Merge branch 'develop' of https://github.com/PaddlePaddle/Paddle into bi_tensor_prod_op

cmake/cblas.cmake

 # Find the CBlas and lapack libraries
 #
-# It will search MKL, atlas, OpenBlas, reference-cblas in order.
+# It will search MKLML, atlas, OpenBlas, reference-cblas in order.
 #
 # If any cblas implementation found, the following variable will be set.
-#    CBLAS_PROVIDER  # one of MKL, ATLAS, OPENBLAS, REFERENCE
+#    CBLAS_PROVIDER  # one of MKLML, ATLAS, OPENBLAS, REFERENCE
 #    CBLAS_INC_DIR   # the include directory for cblas.
 #    CBLAS_LIBS      # a list of libraries should be linked by paddle.
 #                    # Each library should be full path to object file.
-#
-# User should set one of MKL_ROOT, ATLAS_ROOT, OPENBLAS_ROOT, REFERENCE_CBLAS_ROOT
-# during cmake. If none of them set, it will try to find cblas implementation in
-# system paths.
-#
 
 set(CBLAS_FOUND OFF)
 
@@ -30,44 +25,6 @@ if(WITH_MKLML AND MKLML_INC_DIR AND MKLML_LIB)
   return()
 endif()
 
-## Then find MKL.
-set(INTEL_MKL_ROOT "/opt/intel/mkl" CACHE PATH "Folder contains intel mkl libs")
-set(MKL_ROOT $ENV{MKL_ROOT} CACHE PATH "Folder contains env MKL")
-
-set(MKL_INCLUDE_SEARCH_PATHS
-  ${MKL_ROOT}/include
-  ${INTEL_MKL_ROOT}/include)
-set(MKL_LIB_SEARCH_PATHS
-  ${MKL_ROOT}/lib
-  ${MKL_ROOT}/lib/intel64
-  ${INTEL_MKL_ROOT}/lib
-  ${INTEL_MKL_ROOT}/lib/intel64)
-
-find_path(MKL_INC_DIR mkl.h PATHS
-  ${MKL_INCLUDE_SEARCH_PATHS})
-find_path(MKL_LAPACK_INC_DIR mkl_lapacke.h PATHS
-  ${MKL_INCLUDE_SEARCH_PATHS})
-find_library(MKL_CORE_LIB NAMES mkl_core PATHS
-  ${MKL_LIB_SEARCH_PATHS})
-find_library(MKL_SEQUENTIAL_LIB NAMES mkl_sequential PATHS
-  ${MKL_LIB_SEARCH_PATHS})
-find_library(MKL_INTEL_LP64 NAMES mkl_intel_lp64 PATHS
-  ${MKL_LIB_SEARCH_PATHS})
-
-if(MKL_LAPACK_INC_DIR AND MKL_INC_DIR AND MKL_CORE_LIB AND MKL_SEQUENTIAL_LIB AND MKL_INTEL_LP64)
-  set(CBLAS_FOUND ON)
-  set(CBLAS_PROVIDER MKL)
-  set(CBLAS_INC_DIR ${MKL_INC_DIR} ${MKL_LAPACK_INC_DIR})
-  set(CBLAS_LIBRARIES ${MKL_INTEL_LP64} ${MKL_SEQUENTIAL_LIB} ${MKL_CORE_LIB})
-
-  add_definitions(-DPADDLE_USE_MKL)
-  add_definitions(-DLAPACK_FOUND)
-
-  message(STATUS "Found MKL (include: ${MKL_INC_DIR}, library: ${CBLAS_LIBRARIES})")
-  message(STATUS "Found lapack in MKL (include: ${MKL_LAPACK_INC_DIR})")
-  return()
-endif()
-
 ## Then find atlas.
 set(ATLAS_ROOT $ENV{ATLAS_ROOT} CACHE PATH "Folder contains Atlas")
 set(ATLAS_INCLUDE_SEARCH_PATHS

cmake/external/mkldnn.cmake

@@ -46,16 +46,20 @@ IF(${CBLAS_PROVIDER} STREQUAL "MKLML")
     MESSAGE(STATUS "Build MKLDNN with ${MKLDNN_MKLROOT}")
 ENDIF()
 
+SET(MKLDNN_CFLAG "${CMAKE_C_FLAGS} -Wno-error=strict-overflow")
+SET(MKLDNN_CXXFLAG "${CMAKE_CXX_FLAGS} -Wno-error=strict-overflow")
 ExternalProject_Add(
     ${MKLDNN_PROJECT}
     ${EXTERNAL_PROJECT_LOG_ARGS}
     DEPENDS             ${MKLDNN_DEPENDS}
     GIT_REPOSITORY      "https://github.com/01org/mkl-dnn.git"
-    GIT_TAG             "v0.10"
+    GIT_TAG             "v0.11"
     PREFIX              ${MKLDNN_SOURCES_DIR}
     UPDATE_COMMAND      ""
     CMAKE_ARGS          -DCMAKE_INSTALL_PREFIX=${MKLDNN_INSTALL_DIR}
     CMAKE_ARGS          -DMKLROOT=${MKLDNN_MKLROOT}
+    CMAKE_ARGS          -DCMAKE_C_FLAGS=${MKLDNN_CFLAG}
+    CMAKE_ARGS          -DCMAKE_CXX_FLAGS=${MKLDNN_CXXFLAG}
     CMAKE_CACHE_ARGS    -DCMAKE_INSTALL_PREFIX:PATH=${MKLDNN_INSTALL_DIR}
                         -DMKLROOT:PATH=${MKLDNN_MKLROOT}
 )

cmake/external/mklml.cmake

@@ -27,8 +27,8 @@ ENDIF()
 INCLUDE(ExternalProject)
 
 SET(MKLML_PROJECT       "extern_mklml")
-SET(MKLML_VER           "mklml_lnx_2018.0.20170720")
-SET(MKLML_URL           "https://github.com/01org/mkl-dnn/releases/download/v0.10/${MKLML_VER}.tgz")
+SET(MKLML_VER           "mklml_lnx_2018.0.1.20171007")
+SET(MKLML_URL           "https://github.com/01org/mkl-dnn/releases/download/v0.11/${MKLML_VER}.tgz")
 SET(MKLML_SOURCE_DIR    "${THIRD_PARTY_PATH}/mklml")
 SET(MKLML_DOWNLOAD_DIR  "${MKLML_SOURCE_DIR}/src/${MKLML_PROJECT}")
 SET(MKLML_DST_DIR       "mklml")

cmake/external/openblas.cmake

@@ -86,7 +86,7 @@ IF(NOT ${CBLAS_FOUND})
         UPDATE_COMMAND      ""
         CONFIGURE_COMMAND   ""
     )
-
+    SET(CBLAS_PROVIDER openblas)
     IF(WITH_C_API)
         INSTALL(DIRECTORY ${CBLAS_INC_DIR} DESTINATION third_party/openblas)
         # Because libopenblas.a is a symbolic link of another library, thus need to
@@ -115,7 +115,7 @@ INCLUDE_DIRECTORIES(${CBLAS_INC_DIR})
 # linear algebra libraries for cc_library(xxx SRCS xxx.c DEPS cblas)
 SET(dummyfile ${CMAKE_CURRENT_BINARY_DIR}/cblas_dummy.c)
 FILE(WRITE ${dummyfile} "const char * dummy = \"${dummyfile}\";")
-IF(${CBLAS_PROVIDER} MATCHES MKL)
+IF("${CBLAS_PROVIDER}" STREQUAL "MKLML")
     ADD_LIBRARY(cblas SHARED ${dummyfile})
 ELSE()
     ADD_LIBRARY(cblas STATIC ${dummyfile})

cmake/generic.cmake

@@ -93,7 +93,7 @@ include_directories(${CMAKE_CURRENT_BINARY_DIR})
 if(NOT APPLE AND NOT ANDROID)
     find_package(Threads REQUIRED)
     link_libraries(${CMAKE_THREAD_LIBS_INIT})
-    set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} -ldl -lrt")
+    set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} -pthread -ldl -lrt")
 endif(NOT APPLE AND NOT ANDROID)
 
 function(merge_static_libs TARGET_NAME)

doc/api/v2/config/layer.rst

@@ -82,6 +82,11 @@ maxout
 ..  autoclass:: paddle.v2.layer.maxout
     :noindex:
 
+roi_pool
+--------
+..  autoclass:: paddle.v2.layer.roi_pool
+    :noindex:
+
 Norm Layer
 ==========
 

doc/api/v2/data.rst

@@ -2,112 +2,9 @@
 Data Reader Interface and DataSets
 ==================================
 
+..  toctree::
+    :maxdepth: 1
 
-DataTypes
-=========
-
-..  automodule:: paddle.v2.data_type
-    :members:
-    :noindex:
-
-DataFeeder
-==========
-
-..  automodule:: paddle.v2.data_feeder
-    :members:
-    :noindex:
-
-Reader
-======
-
-..  automodule:: paddle.v2.reader
-    :members:
-    :noindex:
-
-..  automodule:: paddle.v2.reader.creator
-    :members:
-    :noindex:
-
-minibatch
-=========
-
-..  automodule:: paddle.v2.minibatch
-    :members:
-    :noindex:
-
-Dataset
-=======
-
-..  automodule:: paddle.v2.dataset
-    :members:
-    :noindex:
-
-mnist
-+++++
-
-..  automodule:: paddle.v2.dataset.mnist
-    :members:
-    :noindex:
-
-cifar
-+++++
-
-..  automodule:: paddle.v2.dataset.cifar
-    :members:
-    :noindex:
-
-conll05
-+++++++
-
-..  automodule:: paddle.v2.dataset.conll05
-    :members: get_dict,get_embedding,test
-    :noindex:
-
-imdb
-++++
-
-..  automodule:: paddle.v2.dataset.imdb
-    :members:
-    :noindex:
-
-imikolov
-++++++++
-
-..  automodule:: paddle.v2.dataset.imikolov
-    :members:
-    :noindex:
-
-movielens
-+++++++++
-
-..  automodule:: paddle.v2.dataset.movielens
-    :members:
-    :noindex:
-
-..  autoclass:: paddle.v2.dataset.movielens.MovieInfo
-    :noindex:
-    
-..  autoclass:: paddle.v2.dataset.movielens.UserInfo
-    :noindex:
-
-sentiment
-+++++++++
-
-..  automodule:: paddle.v2.dataset.sentiment
-    :members:
-    :noindex:
-
-uci_housing
-+++++++++++
-
-..  automodule:: paddle.v2.dataset.uci_housing
-    :members:
-    :noindex:
-
-wmt14
-+++++
-
-..  automodule:: paddle.v2.dataset.wmt14
-    :members:
-    :noindex:
-
+    data/data_reader.rst
+    data/image.rst
+    data/dataset.rst

doc/api/v2/data/data_reader.rst

+=====================
+Data Reader Interface
+=====================
+
+
+DataTypes
+=========
+
+..  automodule:: paddle.v2.data_type
+    :members:
+    :noindex:
+
+DataFeeder
+==========
+
+..  automodule:: paddle.v2.data_feeder
+    :members:
+    :noindex:
+
+Reader
+======
+
+..  automodule:: paddle.v2.reader
+    :members:
+    :noindex:
+
+..  automodule:: paddle.v2.reader.creator
+    :members:
+    :noindex:
+
+minibatch
+=========
+
+..  automodule:: paddle.v2.minibatch
+    :members:
+    :noindex:

doc/api/v2/data/dataset.rst

+Dataset
+=======
+
+..  automodule:: paddle.v2.dataset
+    :members:
+    :noindex:
+
+mnist
++++++
+
+..  automodule:: paddle.v2.dataset.mnist
+    :members:
+    :noindex:
+
+cifar
++++++
+
+..  automodule:: paddle.v2.dataset.cifar
+    :members:
+    :noindex:
+
+conll05
++++++++
+
+..  automodule:: paddle.v2.dataset.conll05
+    :members: get_dict,get_embedding,test
+    :noindex:
+
+imdb
+++++
+
+..  automodule:: paddle.v2.dataset.imdb
+    :members:
+    :noindex:
+
+imikolov
+++++++++
+
+..  automodule:: paddle.v2.dataset.imikolov
+    :members:
+    :noindex:
+
+movielens
++++++++++
+
+..  automodule:: paddle.v2.dataset.movielens
+    :members:
+    :noindex:
+
+..  autoclass:: paddle.v2.dataset.movielens.MovieInfo
+    :noindex:
+    
+..  autoclass:: paddle.v2.dataset.movielens.UserInfo
+    :noindex:
+
+sentiment
++++++++++
+
+..  automodule:: paddle.v2.dataset.sentiment
+    :members:
+    :noindex:
+
+uci_housing
++++++++++++
+
+..  automodule:: paddle.v2.dataset.uci_housing
+    :members:
+    :noindex:
+
+wmt14
++++++
+
+..  automodule:: paddle.v2.dataset.wmt14
+    :members:
+    :noindex:

doc/api/v2/data/image.rst

+Image Interface
+===============
+
+..  automodule:: paddle.v2.image
+    :members:

doc/design/mkldnn/README.MD

@@ -15,6 +15,7 @@
  	- [CMake](#cmake)
 	- [Layers](#layers)
 	- [Activations](#activations)
+	- [Weights](#weights)
 	- [Unit Tests](#unit-tests)
 	- [Protobuf Messages](#protobuf-messages)
 	- [Python API](#python-api)
@@ -45,17 +46,23 @@ Figure 1. PaddlePaddle on IA.
 
 ### Layers
 所有MKL-DNN相关的C++ layers，都会按照PaddlePaddle的目录结构存放在
-`paddle/gserver/layers`中，并且文件名都会一以*Mkldnn*开头。
+`paddle/gserver/layers`中，并且文件名都会一以*MKLDNN*开头。
 
-所有MKL-DNN的layers都会继承于一个叫做`MkldnnLayer`的父类，该父类继承于PaddlePaddle的基类`Layer`。
+所有MKL-DNN的layers都会继承于一个叫做`MKLDNNLayer`的父类，该父类继承于PaddlePaddle的基类`Layer`。
+
+在`MKLDNNLayer`中会提供一些必要的接口和函数，并且会写好`forward`和`backward`的基本逻辑。部分函数定义为纯虚函数，子类只需要实现这些函数即可。
 
 ### Activations
-由于在PaddlePaddle中，激活函数是独立于layer概念的，所以会在`paddle/gserver/activations`目录下添加一个`MkldnnActivation.h`文件定义一些用于MKL-DNN的接口，实现方法还是会在`ActivationFunction.cpp`文件。
+由于在PaddlePaddle中，激活函数是独立于layer概念的，所以会在`paddle/gserver/activations`目录下添加`MKLDNNActivation.h`和`MKLDNNActivation.cpp`文件用于定义和使用MKL-DNN的接口。
 
-### Unit Tests
-会在`paddle/gserver/test`目录下添加`test_Mkldnn.cpp`和`MkldnnTester.*`用于MKL-DNN的测试。
+### Weights
+由于有些layer是含有参数的，我们会尽量让MKL-DNN的参数与PaddlePaddle中`parameter`共享一块内存。
+同时，由于MKL-DNN在训练时使用的参数layout可能与PaddlePaddle默认的`nchw`不一致，我们会在网络训练的开始和结束时分别转换这个layout，使得最终保存的参数格式与PaddlePaddle一致。
 
-Activation的测试，计划在PaddlePaddle原有的测试文件上直接添加新的测试type。
+### Unit Tests
+会在`paddle/gserver/test`目录下添加`test_MKLDNN.cpp`和`MKLDNNTester.*`用于MKL-DNN的测试。
+测试分为每个layer(或activation)的单元测试和简单网络的整体测试。
+每个测试会对比PaddlePaddle中CPU算出的结果与MKL-DNN的结果，小于某个比较小的阈值认为通过。
 
 ### Protobuf Messages
 根据具体layer的需求可能会在`proto/ModelConfig.proto`里面添加必要的选项。
@@ -82,7 +89,7 @@ if use_mkldnn
 会在`v1_api_demo`目录下添加一个`mkldnn`的文件夹，里面放入一些用于MKL-DNN测试的demo脚本。
 
 ### Benchmarking
-会考虑添加部分逻辑在`benchmark/paddle/image/run.sh`，添加使用MKL-DNN的测试。
+会添加`benchmark/paddle/image/run_mkldnn.sh`，用于测试使用MKL-DNN之后的性能。
 
 ### Others
 1. 如果在使用MKL-DNN的情况下，会把CPU的Buffer对齐为64。
@@ -94,14 +101,16 @@ if use_mkldnn
 
 我们总结出一些特别需要注意的点：
 
-1. 使用**deviceId_**。为了尽可能少的在父类Layer中添加变量或者函数，我们决定使用已有的`deviceId_`变量来区分layer的属性，定义`-2`为`MkldnnLayer`特有的设备ID。
+1. 使用**deviceId_**。为了尽可能少的在父类Layer中添加变量或者函数，我们决定使用已有的`deviceId_`变量来区分layer的属性，定义`-2`为`MKLDNNLayer`特有的设备ID。
 2. 重写父类Layer的**init**函数，修改`deviceId_`为`-2`，代表这个layer是用于跑在MKL-DNN的环境下。
-3. 创建`MkldnnMatrix`，用于管理MKL-DNN会用到的相关memory函数、接口以及会用的到格式信息。
-4. 创建`MkldnnBase`，定义一些除了layer和memory相关的类和函数。包括MKL-DNN会用到`MkldnnStream`和`CpuEngine`，和未来可能还会用到`FPGAEngine`等。
-5. 在**Argument**里添加两个`MkldnnMatrixPtr`，取名为`mkldnnValue`和`mkldnnGrad`，用于存放`MkldnnLayer`会用到的memory buffer。 并且添加函数cvt(会修改为一个更加合适的函数名)，用于处理"CPU device"和"MKL-DNN device"之间memory的相互转化。
-6. 在父类`Layer`中的`getOutput`函数中添加一段逻辑，用于判断`deviceId`，并针对device在MKL-DNN和CPU之间不统一的情况，做一个前期转换。 也就是调用`Argument`的cvt函数把output统一到需要的device上。
-7. 在原来的`FLAGS`中添加一个`use_mkldnn`的flag，用于选择是否使用MKL-DNN的相关功能。
-8. 关于MKLDNN参数的保存。由于MKLDNN参数的格式与PaddlePaddle原有的格式存在不一样的情况，所以需要在保存参数时同时保存该格式信息。目前准备扩展[Header](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/parameter/Parameter.h#L247)里面的`int32_t version`。这个值不管是在v1还是在v2里面，一直保存的是0，所以可以充分利用这个信息，定义一个枚举处理所有MKLDNN的参数格式，从而`MKLDNNLayer`就可以从输入的参数中获取需要的格式信息。
+3. 创建`MKLDNNMatrix`，同时继承`CpuMatrix`和`mkldnn::memory`。用于管理MKL-DNN会用到的相关memory函数、接口以及会用的到格式信息。
+4. 创建`MKLDNNBase`，定义一些除了layer和memory相关的类和函数。包括MKL-DNN会用到`MKLDNNStream`和`CPUEngine`，和未来可能还会用到`FPGAEngine`等。
+5. 每个`MKLDNNlayer`都会有`inVal_`,`inGrad_`,`outVal_`和`outGrad_`，分别代表input value， input gradient，output value和output gradient。他们会存放MKL-DNN用到的internal memory。同时还会定义以*ext*开头的`MKLDNNMatrix`(表示external的memory)，主要是在格式与PaddlePaddle默认的`nchw`格式不匹配时，用于转换内存的工作。必要的转换函数也会在`MKLDNNLayer`中提前定义好，每个子类只需要调用定义好的reset buffer函数即可。
+6. 每个`MKLDNNlayer`的resetbuffer相关的函数（包括reset input、output的Value和grad），他们会根据输入参数reset internal和external的memory，当然这两者也可以相等，即表示不需要转换。只需要把握一个原则，每个`MKLDNNlayer`的子类，只需要使用internal的memory就可以了，所有external的转换工作在父类的reset函数中都提前准备好了。
+7. 一般来说，external的memory会尽量与PaddlePaddle中的`value`和`grad`共享内存。同时每个`MKLDNNLayer`中的external output value和gradient(也就是`extOutVal_`和`extOutGrad_`)必须分别与`output_.value`和`output_.grad`共享内存，因为PaddlePaddle的activation会直接使用`output_.value`和`output_.grad`。如果不需要external的buffer用于转换，那么internal的buffer也会与他们共享内存。
+8. 如果MKL-DNN layer的后面接有cpu device，那么就会使`output_.value`与`extOutVal_`共享内存，同时数据格式就是`nchw`，这样下一个cpu device就能拿到正确的数据。在有cpu device的时候，external的memory的格式始终是`nchw`或者`nc`。
+9. 由于MKL-DNN的输出操作都是覆盖data的，不是在原来的数据上累加，所以当网络出现分支时，在`backward`时会需要merge不同layer的梯度。`MKLDNNlayer`中会实现merge的方法，此时每个小分支的input gradient会先临时保存在一个`MKLDNNMatrix`中，由分支处的layer负责求和，并把结果放到这个layer的`output_.grad`中。所以整体上，每个子类并不会需要关心分支的事情，也是在父类都实现好了。
+10. 在原来的`FLAGS`中添加一个`use_mkldnn`的flag，用于选择是否使用MKL-DNN的相关功能。
 
 ## References
 

doc/design/ops/sequence_decoder.md

+# Design: Sequence Decoder Generating LoDTensors
+In tasks such as machine translation and image to text, 
+a [sequence decoder](https://github.com/PaddlePaddle/book/blob/develop/08.machine_translation/README.md) is necessary to generate sequences.
+
+This documentation describes how to implement the sequence decoder as an operator.
+
+## Beam Search based Decoder
+The [beam search algorithm](https://en.wikipedia.org/wiki/Beam_search) is necessary when generating sequences, 
+it is a heuristic search algorithm that explores the paths by expanding the most promising node in a limited set.
+
+In the old version of PaddlePaddle, a C++ class `RecurrentGradientMachine` implements the general sequence decoder based on beam search, 
+due to the complexity, the implementation relays on a lot of special data structures, 
+quite trivial and hard to be customized by users.
+
+There are a lot of heuristic tricks in the sequence generation tasks, 
+so the flexibility of sequence decoder is very important to users.
+
+During PaddlePaddle's refactoring work,
+some new concept is proposed such as [LoDTensor](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/framework/lod_tensor.md) and [TensorArray](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/design/tensor_array.md) that can better support sequence usage,
+and they can help to make the implementation of beam search based sequence decoder **more transparent and modular** .
+
+For example, the RNN sates, candidates IDs and probabilities of beam search can be represented as `LoDTensors`;
+the selected candidate's IDs in each time step can be stored in a `TensorArray`, and `Packed` to the sentences translated.
+
+## Changing LoD's absolute offset to relative offsets
+The current `LoDTensor` is designed to store levels of variable-length sequences,
+it stores several arrays of integers each represents a level.
+
+The integers in each level represents the begin and end (not inclusive) offset of a sequence **in the underlying tensor**, 
+let's call this format the **absolute-offset LoD** for clear.
+
+The relative-offset LoD can fast retrieve any sequence but fails to represent empty sequences, for example, a two-level LoD is as follows
+```python
+[[0, 3, 9]
+ [0, 2, 3, 3, 3, 9]]
+```
+The first level tells that there are two sequences:
+- the first's offset is `[0, 3)`
+- the second's offset is `[3, 9)`
+
+while on the second level, there are several empty sequences that both begin and end at `3`.
+It is impossible to tell how many empty second-level sequences exist in the first-level sequences.
+
+There are many scenarios that relay on empty sequence representation,
+such as machine translation or image to text, one instance has no translations or the empty candidate set for a prefix.
+
+So let's introduce another format of LoD, 
+it stores **the offsets of the lower level sequences** and is called **relative-offset** LoD.
+
+For example, to represent the same sequences of the above data
+
+```python
+[[0, 3, 6]
+ [0, 2, 3, 3, 3, 9]]
+```
+
+the first level represents that there are two sequences, 
+their offsets in the second-level LoD is `[0, 3)` and `[3, 5)`.
+
+The second level is the same with the relative offset example because the lower level is a tensor.
+It is easy to find out the second sequence in the first-level LoD has two empty sequences.
+
+The following demos are based on relative-offset LoD.
+
+## Usage in a simple machine translation model
+Let's start from a simple machine translation model that is simplified from [machine translation chapter](https://github.com/PaddlePaddle/book/tree/develop/08.machine_translation) to draw a simple blueprint of what a sequence decoder can do and how to use it.
+
+The model has an encoder that learns the semantic vector from a sequence,
+and a decoder which uses the sequence decoder to generate new sentences.
+
+**Encoder**
+```python
+import paddle as pd
+
+dict_size = 8000
+source_dict_size = dict_size
+target_dict_size = dict_size
+word_vector_dim = 128
+encoder_dim = 128
+decoder_dim = 128
+beam_size = 5
+max_length = 120
+
+# encoder
+src_word_id = pd.data(
+    name='source_language_word',
+    type=pd.data.integer_value_sequence(source_dict_dim))
+src_embedding = pd.embedding(size=source_dict_size, size=word_vector_dim)
+
+src_word_vec = pd.lookup(src_embedding, src_word_id)
+
+encoder_out_seq = pd.gru(input=src_word_vec, size=encoder_dim)
+
+encoder_ctx = pd.last_seq(encoder_out_seq)
+# encoder_ctx_proj is the learned semantic vector
+encoder_ctx_proj = pd.fc(
+    encoder_ctx, size=decoder_dim, act=pd.activation.Tanh(), bias=None)
+```
+
+**Decoder**
+
+```python
+def generate():
+    decoder = pd.while_loop()
+    with decoder.step():
+        decoder_mem = decoder.memory(init=encoder_ctx)  # mark the memory
+        generated_ids = decoder.memory() # TODO init to batch_size <s>s
+        generated_scores = decoder.memory() # TODO init to batch_size 1s or 0s
+
+        target_word = pd.lookup(trg_embedding, gendrated_ids)
+        # expand encoder_ctx's batch to fit target_word's lod
+        # for example
+        # decoder_mem.lod is
+        # [[0 1 3],
+        #  [0 1 3 6]]
+        # its tensor content is [a1 a2 a3 a4 a5]
+        # which means there are 2 sentences to translate
+        #   - the first sentence has 1 translation prefixes, the offsets are [0, 1)
+        #   - the second sentence has 2 translation prefixes, the offsets are [1, 3) and [3, 6)
+        # the target_word.lod is 
+        # [[0, 1, 6]
+        #  [0, 2, 4, 7, 9 12]]
+        # which means 2 sentences to translate, each has 1 and 5 prefixes
+        # the first prefix has 2 candidates
+        # the following has 2, 3, 2, 3 candidates
+        # the encoder_ctx_expanded's content will be
+        # [a1 a1 a2 a2 a3 a3 a3 a4 a4 a5 a5 a5]
+        encoder_ctx_expanded = pd.lod_expand(encoder_ctx, target_word)
+        decoder_input = pd.fc(
+            act=pd.activation.Linear(),
+            input=[target_word, encoder_ctx],
+            size=3 * decoder_dim)
+        gru_out, cur_mem = pd.gru_step(
+            decoder_input, mem=decoder_mem, size=decoder_dim)
+        scores = pd.fc(
+            gru_out,
+            size=trg_dic_size,
+            bias=None,
+            act=pd.activation.Softmax())
+        # K is an config
+        topk_scores, topk_ids = pd.top_k(scores, K)
+        topk_generated_scores = pd.add_scalar(topk_scores, generated_scores)
+
+        selected_ids, selected_generation_scores = decoder.beam_search(
+            topk_ids, topk_generated_scores)
+
+        # update the states
+        decoder_mem.update(cur_mem)  # tells how to update state
+        generated_ids.update(selected_ids)
+        generated_scores.update(selected_generation_scores)
+
+        decoder.output(selected_ids)
+        decoder.output(selected_generation_scores)
+
+translation_ids, translation_scores = decoder()
+```
+The `decoder.beam_search` is a operator that given the candidates and the scores of translations including the candidates,
+return the result of the beam search algorithm.
+
+In this way, users can customize anything on the inputs or outputs of beam search, for example, two ways to prune some translation prefixes
+
+1. meke the correspondind elements in `topk_generated_scores` zero or some small values, beam_search will discard this candidate.
+2. remove some specific candidate in `selected_ids`
+3. get the final `translation_ids`, remove the translation sequence in it.
+
+The implementation of sequence decoder can reuse the C++ class [RNNAlgorithm](https://github.com/Superjom/Paddle/blob/68cac3c0f8451fe62a4cdf156747d6dc0ee000b3/paddle/operators/dynamic_recurrent_op.h#L30),
+so the python syntax is quite similar to a [RNN](https://github.com/Superjom/Paddle/blob/68cac3c0f8451fe62a4cdf156747d6dc0ee000b3/doc/design/block.md#blocks-with-for-and-rnnop).
+
+Both of them are two-level `LoDTensors`
+
+- the first level represents `batch_size` of (source) sentences;
+- the second level represents the candidate ID sets for translation prefix.
+
+for example, 3 source sentences to translate, and has 2, 3, 1 candidates.
+
+Unlike an RNN, in sequence decoder, the previous state and the current state have different LoD and shape,
+a `lod_expand` operator is used to expand the LoD of the previous state to fit the current state.
+
+For example, the previous state
+
+* LoD is `[0, 1, 3][0, 2, 5, 6]`
+* content of tensor is `a1 a2 b1 b2 b3 c1`
+
+the current state stored in `encoder_ctx_expanded`
+
+* LoD is `[0, 2, 7][0 3 5 8 9 11 11]`
+* the content is 
+  - a1 a1 a1 (a1 has 3 candidates, so the state should be copied 3 times for each candidates)
+  - a2 a2
+  - b1 b1 b1
+  - b2
+  - b3 b3
+  - None (c1 has 0 candidates, so c1 is dropped)
+
+Benefit from the relative offset LoD, empty candidate set can be represented naturally.
+
+the status in each time step can be stored in `TensorArray`, and `Pack`ed to a final LoDTensor, the corresponding syntax is 
+
+```python
+decoder.output(selected_ids)
+decoder.output(selected_generation_scores)
+```
+
+the `selected_ids` is the candidate ids for the prefixes, 
+it will be `Packed` by `TensorArray` to a two-level `LoDTensor`,
+the first level represents the source sequences,
+the second level represents generated sequences.
+
+Pack the `selected_scores` will get a `LoDTensor` that stores scores of each candidate of translations.
+
+Pack the `selected_generation_scores` will get a `LoDTensor`, and each tail is the probability of the translation.
+
+## LoD and shape changes during decoding
+<p align="center">
+  <img src="./images/LOD-and-shape-changes-during-decoding.jpg"/>
+</p>
+
+According the image above, the only phrase to change LoD is beam search.
+
+## Beam search design
+The beam search algorthm will be implemented as one method of the sequence decoder, it has 3 inputs
+
+1. `topk_ids`, top K candidate ids for each prefix.
+2. `topk_scores`, the corresponding scores for `topk_ids`
+3. `generated_scores`, the score of the prefixes.
+
+All of the are LoDTensors, so that the sequence affilication is clear.
+Beam search will keep a beam for each prefix and select a smaller candidate set for each prefix.
+
+It will return three variables
+
+1. `selected_ids`, the final candidate beam search function selected for the next step.
+2. `selected_scores`, the scores for the candidates.
+3. `generated_scores`, the updated scores for each prefixes (with the new candidates appended).
+
+## Introducing the LoD-based `Pack` and `Unpack` methods in `TensorArray`
+The `selected_ids`, `selected_scores` and `generated_scores` are LoDTensors,
+and they exist in each time step,
+so it is natural to store them in arrays.
+
+Currently, PaddlePaddle has a module called `TensorArray` which can store an array of tensors,
+the results of beam search are better to store in a `TensorArray`.
+
+The `Pack` and `UnPack` in `TensorArray` are used to package tensors in the array to a `LoDTensor` or split the `LoDTensor` to an array of tensors. 
+It needs some extensions to support pack or unpack an array of `LoDTensors`.

doc/faq/local/index_cn.rst

@@ -99,7 +99,7 @@ PaddlePaddle支持Sparse的训练，sparse训练需要训练特征是 :code:`spa
 利用更多的计算资源
 ++++++++++++++++++
 
-利用更多的计算资源可以分为一下几个方式来进行\:
+利用更多的计算资源可以分为以下几个方式来进行\:
 
 * 单机CPU训练
 

doc/howto/dev/new_op_cn.md

@@ -214,7 +214,7 @@ MulOp(const std::string &type, const framework::VariableNameMap &inputs,
 
     ```cpp
     // if use Eigen unsupported module before include head files
-    #define EIGEN_USE_GPU
+    // #define EIGEN_USE_GPU
 
     namespace ops = paddle::operators;
     REGISTER_OP_GPU_KERNEL(mul, ops::MulKernel<paddle::platform::GPUPlace, float>);

paddle/capi/Matrix.cpp

@@ -54,6 +54,46 @@ paddle_error paddle_matrix_set_row(paddle_matrix mat,
   return kPD_NO_ERROR;
 }
 
+PD_API paddle_error paddle_matrix_set_value(paddle_matrix mat,
+                                          paddle_real* value) {
+  if (mat == nullptr || value == nullptr) return kPD_NULLPTR;
+  auto ptr = cast(mat);
+  if (ptr->mat == nullptr) return kPD_NULLPTR;
+  paddle::real* buf = ptr->mat->getRowBuf(0);
+  size_t width = ptr->mat->getWidth();
+  size_t height = ptr->mat->getHeight();
+  if (ptr->mat->useGpu()) {
+#ifdef PADDLE_WITH_CUDA
+    hl_memcpy(buf, value, sizeof(paddle::real) * width * height);
+#else
+    return kPD_NOT_SUPPORTED;
+#endif
+  } else {
+    std::copy(value, value + width * height, buf);
+  }
+  return kPD_NO_ERROR;
+}
+
+PD_API paddle_error paddle_matrix_get_value(paddle_matrix mat,
+                                          paddle_real* result) {
+  if (mat == nullptr || result == nullptr) return kPD_NULLPTR;
+  auto ptr = cast(mat);
+  if (ptr->mat == nullptr) return kPD_NULLPTR;
+  paddle::real* buf = ptr->mat->getRowBuf(0);
+  size_t width = ptr->mat->getWidth();
+  size_t height = ptr->mat->getHeight();
+  if (ptr->mat->useGpu()) {
+#ifdef PADDLE_WITH_CUDA
+    hl_memcpy(result, buf, width * height * sizeof(paddle::real));
+#else
+    return kPD_NOT_SUPPORTED;
+#endif
+  } else {
+    std::copy(buf, buf + width * height, result);
+  }
+  return kPD_NO_ERROR;
+}
+
 paddle_error paddle_matrix_get_row(paddle_matrix mat,
                                    uint64_t rowID,
                                    paddle_real** rawRowBuffer) {

paddle/capi/examples/model_inference/dense/main.c

@@ -27,19 +27,21 @@ int main() {
   CHECK(paddle_arguments_resize(in_args, 1));
 
   // Create input matrix.
-  paddle_matrix mat = paddle_matrix_create(/* sample_num */ 1,
+  paddle_matrix mat = paddle_matrix_create(/* sample_num */ 10,
                                            /* size */ 784,
                                            /* useGPU */ false);
   srand(time(0));
-  paddle_real* array;
 
-  // Get First row.
-  CHECK(paddle_matrix_get_row(mat, 0, &array));
+  std::vector<paddle_real> input;
+  input.resize(784 * 10);
 
-  for (int i = 0; i < 784; ++i) {
-    array[i] = rand() / ((float)RAND_MAX);
+  for (int i = 0; i < input.size(); ++i) {
+    input[i] = rand() / ((float)RAND_MAX);
   }
   
+  // Set value for the input matrix
+  CHECK(paddle_matrix_set_value(mat, input.data()));
+
   CHECK(paddle_arguments_set_value(in_args, 0, mat));
 
   paddle_arguments out_args = paddle_arguments_create_none();
@@ -51,11 +53,17 @@ int main() {
 
   CHECK(paddle_arguments_get_value(out_args, 0, prob));
 
-  CHECK(paddle_matrix_get_row(prob, 0, &array));
+  std::std::vector<paddle_real> result;
+  int height;
+  int width;
+
+  CHECK(paddle_matrix_get_shape(prob, &height, &width);
+  result.resize(height * width);
+  CHECK(paddle_matrix_get_value(prob, result.data()));
 
   printf("Prob: ");
-  for (int i = 0; i < 10; ++i) {
-    printf("%.2f ", array[i]);
+  for (int i = 0; i < height * width; ++i) {
+    printf("%.2f ", result[i]);
   }
   printf("\n");
 

paddle/capi/matrix.h

@@ -70,6 +70,16 @@ PD_API paddle_error paddle_matrix_set_row(paddle_matrix mat,
                                           uint64_t rowID,
                                           paddle_real* rowArray);
 
+/**
+ * @brief paddle_matrix_set_value Set value to matrix.
+ * @param mat Target Matrix
+ * @param value Row data.
+ * @return paddle_error
+ * @note  value should contain enough element of data to init the mat
+ */
+PD_API paddle_error paddle_matrix_set_value(paddle_matrix mat,
+                                          paddle_real* value);
+
 /**
  * @brief PDMatGetRow Get raw row buffer from matrix
  * @param [in] mat Target matrix
@@ -81,6 +91,15 @@ PD_API paddle_error paddle_matrix_get_row(paddle_matrix mat,
                                           uint64_t rowID,
                                           paddle_real** rawRowBuffer);
 
+/**
+ * @brief copy data from the matrix 
+ * @param [in] mat Target matrix
+ * @param [out] result pointer to store the matrix data 
+ * @return paddle_error
+ * @note the space of the result should allocated before invoke this API
+ */
+PD_API paddle_error paddle_matrix_get_value(paddle_matrix mat,
+                                          paddle_real* result);
 /**
  * @brief PDMatCreateNone Create None Matrix
  * @return

paddle/capi/tests/test_Matrix.cpp

@@ -45,3 +45,49 @@ TEST(CAPIMatrix, createNone) {
   paddle_matrix mat = paddle_matrix_create_none();
   ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_destroy(mat));
 }
+
+TEST(CAPIMatrix, cpu_get_set_value) {
+  paddle_matrix mat = paddle_matrix_create(128, 32, false);
+  std::vector<paddle_real> sample;
+  std::vector<paddle_real> result;
+  sample.resize(128 * 32);
+  result.resize(128 * 32);
+  for (size_t i = 0; i < sample.size(); ++i) {
+    sample[i] = 1.0 / (i + 1.0);
+  }
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_set_value(mat, sample.data()));
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_get_value(mat, result.data()));
+  for (size_t i = 0; i < sample.size(); ++i) {
+    ASSERT_NEAR(sample[i], result[i], 1e-5);
+  }
+
+  uint64_t height, width;
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_get_shape(mat, &height, &width));
+  ASSERT_EQ(128UL, height);
+  ASSERT_EQ(32UL, width);
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_destroy(mat));
+}
+
+#ifdef PADDLE_WITH_CUDA
+TEST(CAPIMatrix, gpu_get_set_value) {
+  paddle_matrix mat = paddle_matrix_create(128, 32, true);
+  std::vector<paddle_real> sample;
+  std::vector<paddle_real> result;
+  sample.resize(128 * 32);
+  result.resize(128 * 32);
+  for (size_t i = 0; i < sample.size(); ++i) {
+    sample[i] = 1.0 / (i + 1.0);
+  }
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_set_value(mat, sample.data()));
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_get_value(mat, result.data()));
+  for (size_t i = 0; i < sample.size(); ++i) {
+    ASSERT_NEAR(sample[i], result[i], 1e-5);
+  }
+
+  uint64_t height, width;
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_get_shape(mat, &height, &width));
+  ASSERT_EQ(128UL, height);
+  ASSERT_EQ(32UL, width);
+  ASSERT_EQ(kPD_NO_ERROR, paddle_matrix_destroy(mat));
+}
+#endif

paddle/framework/backward.cc

@@ -321,8 +321,6 @@ static void CreateGradVarInBlock(
         auto* param = block_desc->FindVarRecursive(pname);
         auto* grad = block_desc->FindVar(arg);
         if (param == nullptr) {
-          LOG(WARNING) << "Cannot find forward variable of " << arg
-                       << ". Set its gradient to FP32";
           grad->SetDataType(DataType::FP32);
         } else {
           grad->SetDataType(param->GetDataType());
@@ -408,6 +406,11 @@ std::vector<std::unique_ptr<OpDescBind>> MakeBlockBackward(
 
     for (const auto& desc : op_grads) {
       for (const std::string& out_name : desc->OutputArgumentNames()) {
+        if (out_name.find("@GRAD") == std::string::npos) {
+          // Not all outputs of a backward operator is a gradient. Only gradient
+          // need to be sum. Skip variables are not gradient.
+          continue;
+        }
         dup_out_ops[out_name].emplace_back(grad_desc_idx);
       }
       ++grad_desc_idx;

paddle/framework/backward_test.cc

@@ -21,7 +21,7 @@
 #include "paddle/framework/var_desc.h"
 #include "paddle/operators/net_op.h"
 
-USE_OP(fill_constant);
+USE_NO_KERNEL_OP(fill_constant);
 
 namespace paddle {
 namespace framework {

paddle/framework/block_desc.cc

@@ -50,6 +50,15 @@ VarDescBind *BlockDescBind::FindVarRecursive(const std::string &name) const {
   return it->second.get();
 }
 
+VarDescBind *BlockDescBind::FindRecursiveOrCreateVar(
+    const std::string &name_bytes) {
+  VarDescBind *res = FindVarRecursive(name_bytes);
+  if (res == nullptr) {
+    res = Var(name_bytes);
+  }
+  return res;
+}
+
 bool BlockDescBind::HasVarRecursive(const std::string &name) const {
   return FindVarRecursive(name) != nullptr;
 }

paddle/framework/block_desc.h

@@ -58,6 +58,8 @@ class BlockDescBind {
 
   VarDescBind *FindVarRecursive(const std::string &name_bytes) const;
 
+  VarDescBind *FindRecursiveOrCreateVar(const std::string &name_bytes);
+
   bool HasVarRecursive(const std::string &var_name) const;
 
   std::set<std::string> LocalVarNames() const {

paddle/framework/data_type.h

@@ -34,6 +34,21 @@ inline DataType ToDataType(std::type_index type) {
   }
 }
 
+inline std::type_index ToTypeIndex(DataType type) {
+  switch (type) {
+    case DataType::FP32:
+      return typeid(float);
+    case DataType::FP64:
+      return typeid(double);
+    case DataType::INT32:
+      return typeid(int);
+    case DataType::INT64:
+      return typeid(int64_t);
+    default:
+      PADDLE_THROW("Not support type %d", type);
+  }
+}
+
 template <typename Visitor>
 inline void VisitDataType(DataType type, Visitor visitor) {
   switch (type) {

paddle/framework/ddim.cc

@@ -79,6 +79,13 @@ DDim make_ddim(const std::vector<int64_t>& dims) {
   return result;
 }
 
+DDim make_ddim(const std::vector<int>& dims) {
+  std::vector<int64_t> res(dims.size());
+  std::transform(dims.begin(), dims.end(), res.begin(),
+                 [](int d) { return static_cast<int64_t>(d); });
+  return make_ddim(res);
+}
+
 /// @cond HIDDEN
 // XXX For some reason, putting this in an anonymous namespace causes errors
 class DynamicMutableIndexer : public boost::static_visitor<int64_t&> {

paddle/framework/ddim.h

@@ -81,6 +81,8 @@ struct DDim {
  */
 DDim make_ddim(const std::vector<int64_t>& dims);
 
+DDim make_ddim(const std::vector<int>& dims);
+
 /**
  * \brief Make a DDim from an initializer list
  *

paddle/framework/op_desc.cc

@@ -357,7 +357,8 @@ void OpDescBind::InferVarType(BlockDescBind *block) const {
                 "LOD_TENSOR";
     for (auto &out_pair : this->outputs_) {
       for (auto &out_var_name : out_pair.second) {
-        block->Var(out_var_name)->SetType(VarDesc::LOD_TENSOR);
+        block->FindRecursiveOrCreateVar(out_var_name)
+            ->SetType(VarDesc::LOD_TENSOR);
       }
     }
   }

paddle/framework/scope.cc

@@ -98,5 +98,23 @@ void Scope::DeleteScope(Scope* scope) {
   delete scope;
 }
 
+void Scope::Rename(const std::string& origin_name,
+                   const std::string& new_name) const {
+  auto origin_it = vars_.find(origin_name);
+  PADDLE_ENFORCE(origin_it != vars_.end(),
+                 "Cannot find original variable with name %s", origin_name);
+  auto new_it = vars_.find(new_name);
+  PADDLE_ENFORCE(new_it == vars_.end(),
+                 "The variable with name %s is already in the scope", new_name);
+  vars_[new_name] = origin_it->second;
+  vars_.erase(origin_it);
+}
+
+std::string Scope::Rename(const std::string& origin_name) const {
+  auto var_name = string::Sprintf("%p.%d", this, vars_.size());
+  Rename(origin_name, var_name);
+  return var_name;
+}
+
 }  // namespace framework
 }  // namespace paddle

paddle/framework/scope.h

@@ -68,11 +68,18 @@ class Scope {
   // enumerate all the variables current contains.
   std::vector<std::string> GetAllNames(bool recursive = false) const;
 
+  // Rename variable to a new name
+  void Rename(const std::string& origin_name,
+              const std::string& new_name) const;
+
+  // Rename variable to a new name and return the new name
+  std::string Rename(const std::string& origin_name) const;
+
  private:
   // Call Scope::NewScope for a sub-scope.
   explicit Scope(Scope const* parent) : parent_(parent) {}
 
-  std::unordered_map<std::string, Variable*> vars_;
+  mutable std::unordered_map<std::string, Variable*> vars_;
   mutable std::list<Scope*> kids_;
   Scope const* parent_{nullptr};
 

paddle/function/CMakeLists.txt

@@ -45,6 +45,7 @@ if(WITH_GPU)
     add_simple_unittest(BlockExpandOpTest)
     add_simple_unittest(CropOpTest)
     add_simple_unittest(SwitchOpTest)
+    add_simple_unittest(ScaleSubRegionOpTest)
 endif()
 
 add_simple_unittest(Im2ColTest)

paddle/function/FunctionTest.h

@@ -110,6 +110,7 @@ public:
         function2_(FunctionBase::funcRegistrar_.createByType(name2)) {
     function1_->init(config);
     function2_->init(config);
+    initArgsCallback_ = nullptr;
   }
 
   ~Compare2Function() {}
@@ -170,6 +171,10 @@ public:
                                       *seq2_));
   }
 
+  void registerInitCallback(std::function<void(BufferArg&, size_t)> callback) {
+    initArgsCallback_ = callback;
+  }
+
   // output need only contains shape, do not contains data.
   void addOutputs(const BufferArg& output, ArgType argType = ASSIGN_TO) {
     size_t size =
@@ -340,6 +345,10 @@ protected:
         initArg(*func1Inputs_[i]);
       }
 
+      if (initArgsCallback_ != nullptr) {
+        initArgsCallback_(*func1Inputs_[i], i);
+      }
+
       copyArg_(*func1Inputs_[i], *func2Inputs_[i]);
     }
   }
@@ -386,6 +395,7 @@ protected:
   std::shared_ptr<SequenceIdArg> seq1_;
   std::shared_ptr<SequenceIdArg> seq2_;
   test::CopyArgument<DType1, DType2> copyArg_;
+  std::function<void(BufferArg&, size_t)> initArgsCallback_;
 };
 
 class CpuGpuFuncCompare

paddle/function/ScaleSubRegionOp.cpp

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "ScaleSubRegionOp.h"
+#include "paddle/function/TensorShape.h"
+
+namespace paddle {
+
+template <>
+void ScaleSubRegion<DEVICE_TYPE_CPU>(real* outputs,
+                                     const real* inputs,
+                                     const real* indices,
+                                     const TensorShape shape,
+                                     const FuncConfig& conf) {
+  real value = conf.get<real>("value");
+
+  int number = shape[0];
+  int channel = shape[1];
+  int height = shape[2];
+  int width = shape[3];
+
+  memcpy(outputs, inputs, number * channel * height * width * sizeof(real));
+
+  for (int n = 0; n < number; ++n) {
+    // indices start from 1
+    int offset = n * 6;
+    for (int c = indices[offset] - 1; c < indices[offset + 1]; ++c) {
+      for (int h = indices[offset + 2] - 1; h < indices[offset + 3]; ++h) {
+        for (int w = indices[offset + 4] - 1; w < indices[offset + 5]; ++w) {
+          int idx = ((n * channel + c) * height + h) * width + w;
+          outputs[idx] *= value;
+        }
+      }
+    }
+  }
+}
+
+template <>
+void ScaleSubRegionGrad<DEVICE_TYPE_CPU>(const real* inGrad,
+                                         real* outGrad,
+                                         const real* indices,
+                                         const TensorShape shape,
+                                         const FuncConfig& conf) {
+  real value = conf.get<real>("value");
+
+  int number = shape[0];
+  int channel = shape[1];
+  int height = shape[2];
+  int width = shape[3];
+
+  for (int n = 0; n < number; ++n) {
+    for (int c = 0; c < channel; ++c) {
+      for (int h = 0; h < height; ++h) {
+        for (int w = 0; w < width; ++w) {
+          int idx = ((n * channel + c) * height + h) * width + w;
+          int offset = n * 6;
+          if (c >= (indices[offset] - 1) && c <= (indices[offset + 1] - 1) &&
+              h >= (indices[offset + 2] - 1) &&
+              h <= (indices[offset + 3] - 1) &&
+              w >= (indices[offset + 4] - 1) &&
+              w <= (indices[offset + 5] - 1)) {
+            outGrad[idx] += inGrad[idx] * value;
+          } else {
+            outGrad[idx] += inGrad[idx];
+          }
+        }
+      }
+    }
+  }
+}
+
+/**
+ * \brief For each instance, ScaleSubRegion can be used to multiply a value to
+ *        a specified sub continuous region. By providing start index and end
+ *        index for C/H/W, you can specify the location and shape of the region.
+ *
+ * Argument in this Function:
+ * \param inputs    A 4-D tensor with shape [N, C, H, W], only one input.
+ * \param indices   A 2-D tensor with shape [N, 6], indicates the sub region.
+ * \param outputs   A 4-D tensor with same shape as inputs, output value.
+ */
+template <DeviceType Device>
+class ScaleSubRegionFunc : public FunctionBase {
+public:
+  void init(const FuncConfig& config) override { conf_ = config; }
+
+  void calc(const BufferArgs& inputs, const BufferArgs& outputs) override {
+    CHECK_EQ(2UL, inputs.size());
+    CHECK_EQ(1UL, outputs.size());
+    CHECK_EQ(outputs[0].getArgType(), ASSIGN_TO);
+
+    TensorShape shape = inputs[0].shape();
+
+    ScaleSubRegion<Device>(outputs[0].data<real>(),
+                           inputs[0].data<real>(),
+                           inputs[1].data<real>(),
+                           shape,
+                           conf_);
+  }
+
+private:
+  FuncConfig conf_;
+};
+
+/**
+ * \brief The backward propagation of ScaleSubRegion Function.
+ *
+ * Argument in this Function:
+ * \param inputs  A 4-D tensor with shape [N, C, H, W], output gradient.
+ * \param indices A 2-D tensor with shape [N, 6], indicates the sub region.
+ * \param outputs A 4-D tensor with shape [N, C, H, W], gradient of input value.
+ */
+
+template <DeviceType Device>
+class ScaleSubRegionGradFunc : public FunctionBase {
+public:
+  void init(const FuncConfig& config) override { conf_ = config; }
+
+  void calc(const BufferArgs& inputs, const BufferArgs& outputs) override {
+    CHECK_EQ(2UL, inputs.size());
+    CHECK_EQ(1UL, outputs.size());
+    CHECK_EQ(outputs[0].getArgType(), ADD_TO);
+
+    TensorShape shape = inputs[0].shape();
+
+    ScaleSubRegionGrad<Device>(inputs[0].data<real>(),
+                               outputs[0].data<real>(),
+                               inputs[1].data<real>(),
+                               shape,
+                               conf_);
+  }
+
+private:
+  FuncConfig conf_;
+};
+
+REGISTER_TYPED_FUNC(ScaleSubRegion, CPU, ScaleSubRegionFunc);
+REGISTER_TYPED_FUNC(ScaleSubRegionGrad, CPU, ScaleSubRegionGradFunc);
+#ifdef PADDLE_WITH_CUDA
+REGISTER_TYPED_FUNC(ScaleSubRegion, GPU, ScaleSubRegionFunc);
+REGISTER_TYPED_FUNC(ScaleSubRegionGrad, GPU, ScaleSubRegionGradFunc);
+#endif
+
+}  // namespace paddle

paddle/function/ScaleSubRegionOp.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#pragma once
+
+#include "Function.h"
+
+namespace paddle {
+
+/**
+ * \brief Function to multiply a value to values in specified sub continuous
+ *        region. Indices must be provided to indcate the location and shape of
+ *        the region and the multiplied value is passed by configure variable.
+ *
+ *
+ * \param[out] outputs  Output value.
+ * \param[in]  inputs   Input data which contains NCHW information.
+ * \param[in]  indices  Indices data to indcate the sub region.
+ * \param[in]  shape    Tensor shape of input value.
+ * \param[in]  conf     Configure variable which contains the multiplied value.
+ */
+template <DeviceType Device>
+void ScaleSubRegion(real* outputs,
+                    const real* inputs,
+                    const real* indices,
+                    const TensorShape shape,
+                    const FuncConfig& conf);
+
+/**
+ * \brief Backward propagation function of ScaleSubRegion.
+ *
+ * \param[out] inGrad   Gradients of previous layer.
+ * \param[in]  outGrad  Output gradient.
+ * \param[in]  indices  Indices data.
+ * \param[in]  shape    The Shape of input tensor.
+ * \param[in]  conf     Configure variable.
+ */
+template <DeviceType Device>
+void ScaleSubRegionGrad(const real* inGrad,
+                        real* outGrad,
+                        const real* indices,
+                        const TensorShape shape,
+                        const FuncConfig& conf);
+}  // namespace paddle

paddle/function/ScaleSubRegionOpGpu.cu

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "ScaleSubRegionOp.h"
+#include "hl_base.h"
+
+namespace paddle {
+
+__global__ void KeScaleSubRegion(real* outputs,
+                                 const real* inputs,
+                                 const real* indices,
+                                 real value,
+                                 int channel,
+                                 int height,
+                                 int width,
+                                 int nthreads) {
+  const int idx = threadIdx.x + blockIdx.x * blockDim.x;
+  if (idx < nthreads) {
+    const int w = idx % width;
+    const int h = (idx / width) % height;
+    const int c = (idx / width / height) % channel;
+    const int n = idx / width / height / channel;
+
+    const int offset = n * 6;
+    if (c >= (indices[offset] - 1) && c <= (indices[offset + 1] - 1) &&
+        h >= (indices[offset + 2] - 1) && h <= (indices[offset + 3] - 1) &&
+        w >= (indices[offset + 4] - 1) && w <= (indices[offset + 5] - 1)) {
+      outputs[idx] = inputs[idx] * value;
+    } else {
+      outputs[idx] = inputs[idx];
+    }
+  }
+}
+
+template <>
+void ScaleSubRegion<DEVICE_TYPE_GPU>(real* outputs,
+                                     const real* inputs,
+                                     const real* indices,
+                                     const TensorShape shape,
+                                     const FuncConfig& conf) {
+  real value = conf.get<real>("value");
+
+  int number = shape[0];
+  int channel = shape[1];
+  int height = shape[2];
+  int width = shape[3];
+
+  size_t nth = number * channel * height * width;
+  int blockSize = 1024;
+  int gridSize = (nth + blockSize - 1) / blockSize;
+
+  KeScaleSubRegion<<<gridSize, blockSize, 0, STREAM_DEFAULT>>>(
+      outputs, inputs, indices, value, channel, height, width, nth);
+  CHECK_SYNC("ScaleSubRegion");
+}
+
+__global__ void KeScaleSubRegionDiff(const real* inGrad,
+                                     real* outGrad,
+                                     const real* indices,
+                                     real value,
+                                     int channel,
+                                     int height,
+                                     int width,
+                                     int nthreads) {
+  const int idx = threadIdx.x + blockIdx.x * blockDim.x;
+  if (idx < nthreads) {
+    const int w = idx % width;
+    const int h = (idx / width) % height;
+    const int c = (idx / width / height) % channel;
+    const int n = idx / width / height / channel;
+
+    const int offset = n * 6;
+    if (c >= (indices[offset] - 1) && c <= (indices[offset + 1] - 1) &&
+        h >= (indices[offset + 2] - 1) && h <= (indices[offset + 3] - 1) &&
+        w >= (indices[offset + 4] - 1) && w <= (indices[offset + 5] - 1)) {
+      outGrad[idx] += inGrad[idx] * value;
+    } else {
+      outGrad[idx] += inGrad[idx];
+    }
+  }
+}
+
+template <>
+void ScaleSubRegionGrad<DEVICE_TYPE_GPU>(const real* inGrad,
+                                         real* outGrad,
+                                         const real* indices,
+                                         const TensorShape shape,
+                                         const FuncConfig& conf) {
+  real value = conf.get<real>("value");
+
+  int number = shape[0];
+  int channel = shape[1];
+  int height = shape[2];
+  int width = shape[3];
+
+  size_t nth = number * channel * height * width;
+  int blockSize = 1024;
+  int gridSize = (nth + blockSize - 1) / blockSize;
+
+  KeScaleSubRegionDiff<<<gridSize, blockSize, 0, STREAM_DEFAULT>>>(
+      inGrad, outGrad, indices, value, channel, height, width, nth);
+  CHECK_SYNC("ScaleSubRegionGrad");
+}
+
+}  // namespace paddle

paddle/function/ScaleSubRegionOpTest.cpp

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include <gtest/gtest.h>
+#include "FunctionTest.h"
+
+namespace paddle {
+
+TEST(ScaleSubRegion, real) {
+  for (size_t numSamples : {5, 32}) {
+    for (size_t channels : {5, 32}) {
+      for (size_t imgSizeH : {5, 33}) {
+        for (size_t imgSizeW : {5, 32}) {
+          for (real value : {-0.5, 0.0, 0.5}) {
+            for (bool firstHalf : {false, true}) {
+              VLOG(3) << " numSamples=" << numSamples
+                      << " channels=" << channels << " imgSizeH=" << imgSizeH
+                      << " imgSizeW=" << imgSizeW;
+
+              for (bool testGrad : {false, true}) {
+                CpuGpuFuncCompare compare(
+                    testGrad ? "ScaleSubRegionGrad" : "ScaleSubRegion",
+                    FuncConfig().set<real>("value", value));
+
+                TensorShape shape{numSamples, channels, imgSizeH, imgSizeW};
+                TensorShape indicesShape{numSamples, 6};
+
+                compare.addInputs(BufferArg(VALUE_TYPE_FLOAT, shape));
+                compare.addInputs(BufferArg(VALUE_TYPE_FLOAT, indicesShape));
+
+                compare.registerInitCallback([=](BufferArg& arg, size_t index) {
+                  if (index == 1) {
+                    real* data = (real*)arg.data();
+
+                    for (size_t i = 0; i < numSamples; ++i) {
+                      size_t offset = i * 6;
+                      data[offset] = firstHalf ? 1 : channels / 2;
+                      data[offset + 1] = firstHalf ? channels / 2 : channels;
+                      data[offset + 2] = firstHalf ? 1 : imgSizeH / 2;
+                      data[offset + 3] = firstHalf ? imgSizeH / 2 : imgSizeH;
+                      data[offset + 4] = firstHalf ? 1 : imgSizeW / 2;
+                      data[offset + 5] = firstHalf ? imgSizeW / 2 : imgSizeW;
+                    }
+                  }
+                });
+
+                compare.addOutputs(
+                    BufferArg(
+                        VALUE_TYPE_FLOAT, shape, testGrad ? ADD_TO : ASSIGN_TO),
+                    testGrad ? ADD_TO : ASSIGN_TO);
+                compare.run();
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
+
+}  // namespace paddle

paddle/gserver/layers/MKLDNNAddtoLayer.cpp

@@ -62,16 +62,14 @@ void MKLDNNAddtoLayer::resetFwd(std::vector<primitive>& pipeline,
                                 MKLDNNMatrixPtr& wgt,
                                 MKLDNNMatrixPtr& bias,
                                 MKLDNNMatrixPtr& out) {
-  if (biases_) {
-    LOG(FATAL) << "not implemented yet";
-  }
-  resetFwdBuffers(inVals_, out);
+  resetFwdBuffers(inVals_, bias, out);
   in = inVals_[0];
 
   std::shared_ptr<sum::primitive_desc> fwdPD;
-  resetFwdPD(fwdPD, inVals_, out);
+  std::shared_ptr<sum::primitive_desc> biasPD;
+  resetFwdPD(fwdPD, biasPD, inVals_, bias, out);
 
-  resetFwdPipeline(pipeline, fwdPD, inVals_, out);
+  resetFwdPipeline(pipeline, fwdPD, biasPD, inVals_, bias, out);
 }
 
 void MKLDNNAddtoLayer::resetBwd(std::vector<primitive>& pipeline,
@@ -79,7 +77,7 @@ void MKLDNNAddtoLayer::resetBwd(std::vector<primitive>& pipeline,
                                 MKLDNNMatrixPtr& wgt,
                                 MKLDNNMatrixPtr& bias,
                                 MKLDNNMatrixPtr& out) {
-  resetBwdBuffers(inGrads_, out);
+  resetBwdBuffers(inGrads_, bias, out);
   in = inGrads_[0];
 
   // backward only need share output grad to input grad
@@ -89,6 +87,20 @@ void MKLDNNAddtoLayer::resetBwd(std::vector<primitive>& pipeline,
       inputLayers_[i]->getOutputGrad()->setData(inGrads_[i]->getData());
     }
   }
+
+  // backward bias
+  bwdBias_ = nullptr;
+  if (bias) {
+    std::vector<float> scales(bs_, 1.0);
+    std::vector<memory::primitive_desc> srcPDs(bs_, bias->getPrimitiveDesc());
+    auto biasPD = sum::primitive_desc(bias->getMemoryDesc(), scales, srcPDs);
+    std::vector<primitive::at> srcs;
+    for (size_t i = 0; i < grads_.size(); ++i) {
+      srcs.push_back(*(grads_[i]));
+    }
+    bwdBias_.reset(new sum(biasPD, srcs, *bias));
+    pipeline.push_back(*bwdBias_);
+  }
 }
 
 void MKLDNNAddtoLayer::updateWeights(const UpdateCallback& callback) {
@@ -97,7 +109,25 @@ void MKLDNNAddtoLayer::updateWeights(const UpdateCallback& callback) {
   }
 }
 
+void MKLDNNAddtoLayer::prepareBias(MKLDNNMatrixPtr& bias,
+                                   const MatrixPtr& biasMat,
+                                   const MKLDNNMatrixPtr& out,
+                                   std::vector<MKLDNNMatrixPtr>& outs) {
+  auto pd = MKLDNNMatrix::createPrimitiveDesc(
+      {(int)layerSize_}, memory::format::x, engine_);
+  bias = MKLDNNMatrix::create(pd, biasMat);
+  outs.clear();
+  real* data = out->getData();
+  CHECK_EQ(bs_ * layerSize_, out->getElementCnt());
+  for (int i = 0; i < bs_; ++i) {
+    MatrixPtr tmp =
+        Matrix::create(data + i * layerSize_, 1, layerSize_, false, false);
+    outs.push_back(MKLDNNMatrix::create(bias->getPrimitiveDesc(), tmp));
+  }
+}
+
 void MKLDNNAddtoLayer::resetFwdBuffers(std::vector<MKLDNNMatrixPtr>& inputs,
+                                       MKLDNNMatrixPtr& bias,
                                        MKLDNNMatrixPtr& out) {
   inputs.resize(inputLayers_.size());
   for (size_t i = 0; i < inputs.size(); i++) {
@@ -110,12 +140,20 @@ void MKLDNNAddtoLayer::resetFwdBuffers(std::vector<MKLDNNMatrixPtr>& inputs,
   }
 
   resetOutValue(out, inputs[0]->getPrimitiveDesc());
+
+  if (biases_ && biases_->getW()) {
+    prepareBias(bias, biases_->getW(), out, vals_);
+  } else {
+    bias = nullptr;
+  }
 }
 
 void MKLDNNAddtoLayer::resetFwdPD(std::shared_ptr<sum::primitive_desc>& pd,
+                                  std::shared_ptr<sum::primitive_desc>& biasPD,
                                   std::vector<MKLDNNMatrixPtr>& inputs,
+                                  MKLDNNMatrixPtr bias,
                                   MKLDNNMatrixPtr out) {
-  std::vector<double> scales(inputs.size(), 1.0);
+  std::vector<float> scales(inputs.size(), 1.0);
   std::vector<memory::primitive_desc> srcPDs;
   for (size_t i = 0; i < inputs.size(); i++) {
     srcPDs.push_back(inputs[i]->getPrimitiveDesc());
@@ -123,12 +161,23 @@ void MKLDNNAddtoLayer::resetFwdPD(std::shared_ptr<sum::primitive_desc>& pd,
   CHECK(out);
   pd.reset(new sum::primitive_desc(out->getMemoryDesc(), scales, srcPDs));
   CHECK_PRIMITIVE_DESC_EQ(out, pd->dst_primitive_desc());
+
+  biasPD = nullptr;
+  if (bias) {
+    std::vector<float> scales(2, 1.0);
+    std::vector<memory::primitive_desc> srcPDs(2, bias->getPrimitiveDesc());
+    biasPD.reset(
+        new sum::primitive_desc(bias->getMemoryDesc(), scales, srcPDs));
+    CHECK_PRIMITIVE_DESC_EQ(bias, biasPD->dst_primitive_desc());
+  }
 }
 
 void MKLDNNAddtoLayer::resetFwdPipeline(
     std::vector<primitive>& pipeline,
     std::shared_ptr<sum::primitive_desc>& pd,
+    std::shared_ptr<sum::primitive_desc>& biasPD,
     std::vector<MKLDNNMatrixPtr>& inputs,
+    MKLDNNMatrixPtr& bias,
     MKLDNNMatrixPtr& out) {
   std::vector<primitive::at> srcs;
   for (size_t i = 0; i < inputs.size(); i++) {
@@ -136,9 +185,23 @@ void MKLDNNAddtoLayer::resetFwdPipeline(
   }
   fwd_.reset(new sum(*pd, srcs, *out));
   pipeline.push_back(*fwd_);
+
+  fwdBias_.clear();
+  if (biasPD == nullptr || bias == nullptr) {
+    return;
+  }
+  fwdBias_.resize(vals_.size());
+  for (size_t i = 0; i < vals_.size(); ++i) {
+    std::vector<primitive::at> srcs;
+    srcs.push_back(*(vals_[i]));
+    srcs.push_back(*bias);
+    fwdBias_[i].reset(new sum(*biasPD, srcs, *vals_[i]));
+    pipeline.push_back(*fwdBias_[i]);
+  }
 }
 
 void MKLDNNAddtoLayer::resetBwdBuffers(std::vector<MKLDNNMatrixPtr>& inputs,
+                                       MKLDNNMatrixPtr& bias,
                                        MKLDNNMatrixPtr& out) {
   CHECK(outVal_);
   resetOutGrad(out, outVal_->getPrimitiveDesc());
@@ -149,6 +212,12 @@ void MKLDNNAddtoLayer::resetBwdBuffers(std::vector<MKLDNNMatrixPtr>& inputs,
     resetInGrad(inputs[i], inVal_->getPrimitiveDesc(), i);
     CHECK_PRIMITIVE_DESC_EQ(inputs[i], out->getPrimitiveDesc());
   }
+
+  if (biases_ && biases_->getWGrad()) {
+    prepareBias(bias, biases_->getWGrad(), out, grads_);
+  } else {
+    bias = nullptr;
+  }
 }
 
 }  // namespace paddle

paddle/gserver/layers/MKLDNNAddtoLayer.h

@@ -32,9 +32,15 @@ protected:
   // layer size == ic * ih * iw == oc * oh *ow, and can not be changed
   size_t layerSize_;
 
-  // TODO(TJ): this part has not been optimized by MKL-DNN
   std::unique_ptr<Weight> biases_;
 
+  // buffers for adding bias
+  std::vector<MKLDNNMatrixPtr> vals_;
+  std::vector<MKLDNNMatrixPtr> grads_;
+  // primitives for adding bias
+  std::vector<std::shared_ptr<mkldnn::primitive>> fwdBias_;
+  std::shared_ptr<mkldnn::primitive> bwdBias_;
+
 public:
   explicit MKLDNNAddtoLayer(const LayerConfig& config) : MKLDNNLayer(config) {}
 
@@ -91,20 +97,34 @@ protected:
    *                    reset pipeline.
    */
   void resetFwdBuffers(std::vector<MKLDNNMatrixPtr>& inputs,
+                       MKLDNNMatrixPtr& bias,
                        MKLDNNMatrixPtr& out);
   void resetFwdPD(std::shared_ptr<mkldnn::sum::primitive_desc>& pd,
+                  std::shared_ptr<mkldnn::sum::primitive_desc>& biasPD,
                   std::vector<MKLDNNMatrixPtr>& inputs,
+                  MKLDNNMatrixPtr bias,
                   MKLDNNMatrixPtr out);
   void resetFwdPipeline(std::vector<mkldnn::primitive>& pipeline,
                         std::shared_ptr<mkldnn::sum::primitive_desc>& pd,
+                        std::shared_ptr<mkldnn::sum::primitive_desc>& biasPD,
                         std::vector<MKLDNNMatrixPtr>& inputs,
+                        MKLDNNMatrixPtr& bias,
                         MKLDNNMatrixPtr& out);
 
   /**
    * Backward functions: reset buffers(inputs, output, bias)
    */
   void resetBwdBuffers(std::vector<MKLDNNMatrixPtr>& inputs,
+                       MKLDNNMatrixPtr& bias,
                        MKLDNNMatrixPtr& out);
+
+  /**
+   * prepare for bias
+   */
+  void prepareBias(MKLDNNMatrixPtr& bias,
+                   const MatrixPtr& biasMat,
+                   const MKLDNNMatrixPtr& out,
+                   std::vector<MKLDNNMatrixPtr>& outs);
 };
 
 }  // namespace paddle

paddle/gserver/layers/MKLDNNBatchNormLayer.cpp

@@ -119,7 +119,7 @@ void MKLDNNBatchNormLayer::reshape(
     int& bs, int& ic, int& ih, int& iw, int oc, int& oh, int& ow) {
   reshapeInput(bs, ih, iw);
   oh = ih;
-  ow = ow;
+  ow = iw;
   // ic_ and oc can not be changed
   CHECK_EQ(inputElemenCnt_ / bs / ih / iw, (size_t)ic)
       << "Input channel can not be changed";

paddle/gserver/layers/MKLDNNLayer.cpp

@@ -287,7 +287,7 @@ void MKLDNNLayer::resetMergeGrad(MKLDNNMatrixPtr& out) {
     return;
   }
   CHECK(out) << "should have reset internal ouput grad";
-  std::vector<double> scales(outputMap_.size(), 1.0);
+  std::vector<float> scales(outputMap_.size(), 1.0);
   std::vector<memory::primitive_desc> srcPDs;
   std::vector<primitive::at> srcs;
   for (auto it = outputMap_.begin(); it != outputMap_.end(); ++it) {

paddle/gserver/layers/ROIPoolLayer.cpp

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "ROIPoolLayer.h"
+
+namespace paddle {
+
+REGISTER_LAYER(roi_pool, ROIPoolLayer);
+
+bool ROIPoolLayer::init(const LayerMap& layerMap,
+                        const ParameterMap& parameterMap) {
+  Layer::init(layerMap, parameterMap);
+
+  const ROIPoolConfig& layerConf = config_.inputs(0).roi_pool_conf();
+  pooledWidth_ = layerConf.pooled_width();
+  pooledHeight_ = layerConf.pooled_height();
+  spatialScale_ = layerConf.spatial_scale();
+
+  return true;
+}
+
+void ROIPoolLayer::forward(PassType passType) {
+  Layer::forward(passType);
+
+  const ROIPoolConfig& layerConf = config_.inputs(0).roi_pool_conf();
+  height_ = getInput(0).getFrameHeight();
+  if (!height_) height_ = layerConf.height();
+  width_ = getInput(0).getFrameWidth();
+  if (!width_) width_ = layerConf.width();
+  channels_ = getInputValue(0)->getWidth() / width_ / height_;
+
+  size_t batchSize = getInput(0).getBatchSize();
+  size_t numROIs = getInput(1).getBatchSize();
+
+  MatrixPtr dataValue = getInputValue(0);
+  MatrixPtr roiValue = getInputValue(1);
+  resetOutput(numROIs, channels_ * pooledHeight_ * pooledWidth_);
+  MatrixPtr outputValue = getOutputValue();
+
+  if (useGpu_) {  // TODO(guosheng): implement on GPU later
+    MatrixPtr dataCpuBuffer;
+    Matrix::resizeOrCreate(dataCpuBuffer,
+                           dataValue->getHeight(),
+                           dataValue->getWidth(),
+                           false,
+                           false);
+    MatrixPtr roiCpuBuffer;
+    Matrix::resizeOrCreate(roiCpuBuffer,
+                           roiValue->getHeight(),
+                           roiValue->getWidth(),
+                           false,
+                           false);
+    dataCpuBuffer->copyFrom(*dataValue);
+    roiCpuBuffer->copyFrom(*roiValue);
+    dataValue = dataCpuBuffer;
+    roiValue = roiCpuBuffer;
+    MatrixPtr outputCpuBuffer;
+    Matrix::resizeOrCreate(outputCpuBuffer,
+                           outputValue->getHeight(),
+                           outputValue->getWidth(),
+                           false,
+                           false);
+    outputCpuBuffer->copyFrom(*outputValue);
+    outputValue = outputCpuBuffer;
+  }
+
+  real* bottomData = dataValue->getData();
+  size_t batchOffset = dataValue->getWidth();
+  size_t channelOffset = height_ * width_;
+  real* bottomROIs = roiValue->getData();
+  size_t roiOffset = roiValue->getWidth();
+  size_t poolChannelOffset = pooledHeight_ * pooledWidth_;
+
+  real* outputData = outputValue->getData();
+  Matrix::resizeOrCreate(maxIdxs_,
+                         numROIs,
+                         channels_ * pooledHeight_ * pooledWidth_,
+                         false,
+                         false);
+  real* argmaxData = maxIdxs_->getData();
+
+  for (size_t n = 0; n < numROIs; ++n) {
+    // the first five elememts of each RoI should be:
+    // batch_idx, roi_x_start, roi_y_start, roi_x_end, roi_y_end
+    size_t roiBatchIdx = bottomROIs[0];
+    size_t roiStartW = round(bottomROIs[1] * spatialScale_);
+    size_t roiStartH = round(bottomROIs[2] * spatialScale_);
+    size_t roiEndW = round(bottomROIs[3] * spatialScale_);
+    size_t roiEndH = round(bottomROIs[4] * spatialScale_);
+    CHECK_GE(roiBatchIdx, 0);
+    CHECK_LT(roiBatchIdx, batchSize);
+    size_t roiHeight = std::max(roiEndH - roiStartH + 1, 1UL);
+    size_t roiWidth = std::max(roiEndW - roiStartW + 1, 1UL);
+    real binSizeH =
+        static_cast<real>(roiHeight) / static_cast<real>(pooledHeight_);
+    real binSizeW =
+        static_cast<real>(roiWidth) / static_cast<real>(pooledWidth_);
+    real* batchData = bottomData + batchOffset * roiBatchIdx;
+    for (size_t c = 0; c < channels_; ++c) {
+      for (size_t ph = 0; ph < pooledHeight_; ++ph) {
+        for (size_t pw = 0; pw < pooledWidth_; ++pw) {
+          size_t hstart = static_cast<size_t>(std::floor(ph * binSizeH));
+          size_t wstart = static_cast<size_t>(std::floor(pw * binSizeW));
+          size_t hend = static_cast<size_t>(std::ceil((ph + 1) * binSizeH));
+          size_t wend = static_cast<size_t>(std::ceil((pw + 1) * binSizeW));
+          hstart = std::min(std::max(hstart + roiStartH, 0UL), height_);
+          wstart = std::min(std::max(wstart + roiStartW, 0UL), width_);
+          hend = std::min(std::max(hend + roiStartH, 0UL), height_);
+          wend = std::min(std::max(wend + roiStartW, 0UL), width_);
+
+          bool isEmpty = (hend <= hstart) || (wend <= wstart);
+          size_t poolIndex = ph * pooledWidth_ + pw;
+          if (isEmpty) {
+            outputData[poolIndex] = 0;
+            argmaxData[poolIndex] = -1;
+          }
+
+          for (size_t h = hstart; h < hend; ++h) {
+            for (size_t w = wstart; w < wend; ++w) {
+              size_t index = h * width_ + w;
+              if (batchData[index] > outputData[poolIndex]) {
+                outputData[poolIndex] = batchData[index];
+                argmaxData[poolIndex] = index;
+              }
+            }
+          }
+        }
+      }
+      batchData += channelOffset;
+      outputData += poolChannelOffset;
+      argmaxData += poolChannelOffset;
+    }
+    bottomROIs += roiOffset;
+  }
+  if (useGpu_) {
+    getOutputValue()->copyFrom(*outputValue);
+  }
+}
+
+void ROIPoolLayer::backward(const UpdateCallback& callback) {
+  MatrixPtr inGradValue = getInputGrad(0);
+  MatrixPtr outGradValue = getOutputGrad();
+  MatrixPtr roiValue = getInputValue(1);
+
+  if (useGpu_) {
+    MatrixPtr inGradCpuBuffer;
+    Matrix::resizeOrCreate(inGradCpuBuffer,
+                           inGradValue->getHeight(),
+                           inGradValue->getWidth(),
+                           false,
+                           false);
+    MatrixPtr outGradCpuBuffer;
+    Matrix::resizeOrCreate(outGradCpuBuffer,
+                           outGradValue->getHeight(),
+                           outGradValue->getWidth(),
+                           false,
+                           false);
+    MatrixPtr roiCpuBuffer;
+    Matrix::resizeOrCreate(roiCpuBuffer,
+                           roiValue->getHeight(),
+                           roiValue->getWidth(),
+                           false,
+                           false);
+    inGradCpuBuffer->copyFrom(*inGradValue);
+    outGradCpuBuffer->copyFrom(*outGradValue);
+    roiCpuBuffer->copyFrom(*roiValue);
+    inGradValue = inGradCpuBuffer;
+    outGradValue = outGradCpuBuffer;
+    roiValue = roiCpuBuffer;
+  }
+
+  real* bottomROIs = roiValue->getData();
+  size_t numROIs = getInput(1).getBatchSize();
+  size_t roiOffset = getInputValue(1)->getWidth();
+
+  real* inDiffData = inGradValue->getData();
+  size_t batchOffset = getInputValue(0)->getWidth();
+  size_t channelOffset = height_ * width_;
+
+  real* outDiffData = outGradValue->getData();
+  size_t poolChannelOffset = pooledHeight_ * pooledWidth_;
+  real* argmaxData = maxIdxs_->getData();
+
+  for (size_t n = 0; n < numROIs; ++n) {
+    size_t roiBatchIdx = bottomROIs[0];
+    real* batchDiffData = inDiffData + batchOffset * roiBatchIdx;
+    for (size_t c = 0; c < channels_; ++c) {
+      for (size_t ph = 0; ph < pooledHeight_; ++ph) {
+        for (size_t pw = 0; pw < pooledWidth_; ++pw) {
+          size_t poolIndex = ph * pooledWidth_ + pw;
+          if (argmaxData[poolIndex] > 0) {
+            size_t index = static_cast<size_t>(argmaxData[poolIndex]);
+            batchDiffData[index] += outDiffData[poolIndex];
+          }
+        }
+      }
+      batchDiffData += channelOffset;
+      outDiffData += poolChannelOffset;
+      argmaxData += poolChannelOffset;
+    }
+    bottomROIs += roiOffset;
+  }
+
+  if (useGpu_) {
+    getInputGrad(0)->copyFrom(*inGradValue);
+  }
+}
+
+}  // namespace paddle

paddle/gserver/layers/ROIPoolLayer.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#pragma once
+
+#include "Layer.h"
+
+namespace paddle {
+
+/**
+ * A layer used by Fast R-CNN to extract feature maps of ROIs from the last
+ * feature map.
+ * - Input: This layer needs two input layers: The first input layer is a
+ *          convolution layer; The second input layer contains the ROI data
+ *          which is the output of ProposalLayer in Faster R-CNN. layers for
+ *          generating bbox location offset and the classification confidence.
+ * - Output: The ROIs' feature map.
+ * Reference:
+ *    Shaoqing Ren, Kaiming He, Ross Girshick, and Jian Sun.
+ *    Faster R-CNN: Towards Real-Time Object Detection with Region Proposal
+ * Networks
+ */
+
+class ROIPoolLayer : public Layer {
+protected:
+  size_t channels_;
+  size_t width_;
+  size_t height_;
+  size_t pooledWidth_;
+  size_t pooledHeight_;
+  real spatialScale_;
+
+  // Since there is no int matrix, use real maxtrix instead.
+  MatrixPtr maxIdxs_;
+
+public:
+  explicit ROIPoolLayer(const LayerConfig& config) : Layer(config) {}
+
+  bool init(const LayerMap& layerMap,
+            const ParameterMap& parameterMap) override;
+
+  void forward(PassType passType) override;
+  void backward(const UpdateCallback& callback = nullptr) override;
+};
+}  // namespace paddle

paddle/gserver/layers/ScaleSubRegionLayer.cpp

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "ScaleSubRegionLayer.h"
+#include "paddle/utils/Stat.h"
+namespace paddle {
+
+REGISTER_LAYER(scale_sub_region, ScaleSubRegionLayer);
+
+bool ScaleSubRegionLayer::init(const LayerMap& layerMap,
+                               const ParameterMap& parameterMap) {
+  Layer::init(layerMap, parameterMap);
+  CHECK_EQ(static_cast<int>(inputLayers_.size()), 2);
+  auto& conf = config_.inputs(0).scale_sub_region_conf();
+  value_ = conf.value();
+
+  createFunction(forward_, "ScaleSubRegion", FuncConfig().set("value", value_));
+  createFunction(
+      backward_, "ScaleSubRegionGrad", FuncConfig().set("value", value_));
+
+  return true;
+}
+
+void ScaleSubRegionLayer::forward(PassType passType) {
+  Layer::forward(passType);
+  auto in0 = getInput(0);
+  imgH_ = in0.getFrameHeight();
+  imgW_ = in0.getFrameWidth();
+  if (imgH_ == 0 || imgW_ == 0) {
+    auto& conf = config_.inputs(0).scale_sub_region_conf();
+    imgH_ = conf.image_conf().img_size_y();
+    imgW_ = conf.image_conf().img_size();
+  }
+  MatrixPtr imgV = in0.value;
+  size_t batchSize = imgV->getHeight();
+  size_t spatialSize = imgH_ * imgW_;
+  channelsNum_ = imgV->getWidth() / spatialSize;
+  shape_ = TensorShape({batchSize, channelsNum_, imgH_, imgW_});
+
+  resetOutput(batchSize, imgV->getWidth());
+  auto& out = getOutput();
+  out.setFrameHeight(imgH_);
+  out.setFrameWidth(imgW_);
+
+  MatrixPtr indicesV = getInputValue(1);
+  indicesShape_ = TensorShape({batchSize, 6});
+
+  REGISTER_TIMER_INFO("ScaleSubRegionForward", getName().c_str());
+  BufferArgs inArgs;
+  BufferArgs outArgs;
+  inArgs.addArg(*imgV, shape_);
+  inArgs.addArg(*indicesV, indicesShape_);
+  outArgs.addArg(*out.value, shape_, ASSIGN_TO);
+  forward_[0]->calc(inArgs, outArgs);
+}
+
+void ScaleSubRegionLayer::backward(const UpdateCallback& callback) {
+  REGISTER_TIMER_INFO("ScaleSubRegionBackward", getName().c_str());
+  BufferArgs inArgs;
+  BufferArgs outArgs;
+  inArgs.addArg(*getOutputGrad(), shape_);
+  inArgs.addArg(*getInputValue(1), indicesShape_);
+  outArgs.addArg(*getInputGrad(0), shape_, ADD_TO);
+  backward_[0]->calc(inArgs, outArgs);
+}
+
+}  // namespace paddle

paddle/operators/fill_constant_op.h → paddle/gserver/layers/ScaleSubRegionLayer.h

@@ -13,25 +13,40 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #pragma once
-#include "paddle/framework/eigen.h"
-#include "paddle/framework/op_registry.h"
+
+#include "Layer.h"
 
 namespace paddle {
-namespace operators {
-
-template <typename Place, typename T>
-class FillConstantOpKernel : public framework::OpKernel<T> {
- public:
-  void Compute(const framework::ExecutionContext& ctx) const override {
-    auto* out = ctx.Output<framework::Tensor>("Out");
-    out->mutable_data<T>(ctx.GetPlace());
-    auto value = ctx.Attr<float>("value");
-
-    auto out_eigen = framework::EigenVector<T>::Flatten(*out);
-    auto place = ctx.GetEigenDevice<Place>();
-    out_eigen.device(place) = out_eigen.constant(static_cast<T>(value));
-  }
+
+/**
+ * \brief  For each instance, this layer can be used to multiply a value to a
+ *         specified sub continuous region. By providing start index and end
+ *         index for C/H/W, you can specify the location and shape of the
+ *         region.
+ *
+ *         input_0: Input value.
+ *         input_1: Indices value to specify the location an shape of the
+ *                  region.
+ */
+class ScaleSubRegionLayer : public Layer {
+public:
+  explicit ScaleSubRegionLayer(const LayerConfig& config) : Layer(config) {}
+
+  ~ScaleSubRegionLayer() {}
+
+  bool init(const LayerMap& layerMap, const ParameterMap& parameterMap);
+
+  void forward(PassType passType);
+
+  void backward(const UpdateCallback& callback = nullptr);
+
+protected:
+  TensorShape shape_;
+  TensorShape indicesShape_;
+  size_t imgH_;
+  size_t imgW_;
+  size_t channelsNum_;
+  real value_;
 };
 
-}  // namespace operators
 }  // namespace paddle

paddle/gserver/tests/test_LayerGrad.cpp

@@ -53,7 +53,7 @@ TEST(Operator, dot_mul) {
 TEST(Projection, context) {
   for (auto contextStart : {-5, -3, -1, 0, 3}) {
     for (auto contextLength : {1, 2, 5, 7}) {
-      for (auto batchSize : {1, 2, 5, 20, 50}) {
+      for (auto batchSize : {1, 2, 5, 20}) {
         for (auto trainablePadding : {false, true}) {
           LOG(INFO) << " contextStart=" << contextStart
                     << " contextLength=" << contextLength
@@ -585,14 +585,14 @@ TEST(Layer, maxoutLayer) {
 }
 void testFcLayer(string format, size_t nnz) {
   TestConfig config;
-  config.biasSize = 4096;
+  config.biasSize = 1024;
   config.layerConfig.set_type("fc");
-  config.layerConfig.set_size(4096);
+  config.layerConfig.set_size(1024);
   config.layerConfig.set_active_type("sigmoid");
   config.layerConfig.set_drop_rate(0.1);
 
   config.inputDefs.push_back(
-      {INPUT_DATA, "layer_0", 8192, nnz, ParaSparse(format)});
+      {INPUT_DATA, "layer_0", 2048, nnz, ParaSparse(format)});
   config.layerConfig.add_inputs();
 
   LOG(INFO) << config.inputDefs[0].sparse.sparse << " "
@@ -609,9 +609,9 @@ void testFcLayer(string format, size_t nnz) {
 }
 
 TEST(Layer, fcLayer) {
-  testFcLayer("", 4096 * 4096 * 2);
-  testFcLayer("csc", 4096 * 40);
-  testFcLayer("csr", 4096 * 40);
+  testFcLayer("", 1024 * 1024 * 2);
+  testFcLayer("csc", 1024 * 10);
+  testFcLayer("csr", 1024 * 10);
 }
 
 TEST(Layer, SelectiveFullyConnectedLayer) {
@@ -1995,7 +1995,7 @@ TEST(Layer, multibox_loss) {
 TEST(Layer, TransLayer) {
   TestConfig config;
   const int height = 128;
-  const int width = 1028;
+  const int width = 256;
   config.layerConfig.set_type("trans");
   config.layerConfig.set_size(width);
 
@@ -2056,6 +2056,43 @@ TEST(Layer, CropLayer) {
   }
 }
 
+TEST(Layer, roi_pool) {
+  TestConfig config;
+  config.layerConfig.set_type("roi_pool");
+  config.biasSize = 0;
+  LayerInputConfig* input = config.layerConfig.add_inputs();
+  ROIPoolConfig* roiPoolConf = input->mutable_roi_pool_conf();
+  roiPoolConf->set_pooled_width(7);
+  roiPoolConf->set_pooled_height(7);
+  roiPoolConf->set_spatial_scale(1. / 16);
+  roiPoolConf->set_width(14);
+  roiPoolConf->set_height(14);
+
+  const size_t roiNum = 10;
+  const size_t roiDim = 10;
+  const size_t batchSize = 5;
+  MatrixPtr roiValue = Matrix::create(roiNum, roiDim, false, false);
+  roiValue->zeroMem();
+  real* roiData = roiValue->getData();
+  for (size_t i = 0; i < roiNum; ++i) {
+    roiData[i * roiDim + 0] = std::rand() % batchSize;
+    roiData[i * roiDim + 1] = std::rand() % 224;  // xMin
+    roiData[i * roiDim + 2] = std::rand() % 224;  // yMin
+    size_t xMin = static_cast<size_t>(roiData[i * roiDim + 1]);
+    size_t yMin = static_cast<size_t>(roiData[i * roiDim + 2]);
+    roiData[i * roiDim + 3] = xMin + std::rand() % (224 - xMin);  // xMax
+    roiData[i * roiDim + 4] = yMin + std::rand() % (224 - yMin);  // yMax
+  }
+
+  config.inputDefs.push_back({INPUT_DATA, "input", 3 * 14 * 14, {}});
+  config.inputDefs.push_back({INPUT_SELF_DEFINE_DATA, "rois", roiValue, {}});
+  config.layerConfig.add_inputs();
+
+  for (auto useGpu : {false, true}) {
+    testLayerGrad(config, "roi_pool", batchSize, false, useGpu, false);
+  }
+}
+
 TEST(Layer, SwitchOrderLayer) {
   TestConfig config;
   // config input_0
@@ -2358,6 +2395,38 @@ TEST(Layer, ScaleShiftLayer) {
   }
 }
 
+TEST(Layer, ScaleSubRegionLayer) {
+  const size_t batchSize = 64;
+  const size_t size = 4096;
+  TestConfig config;
+  config.layerConfig.set_type("scale_sub_region");
+  config.inputDefs.push_back({INPUT_DATA, "input", size, 0});
+  MatrixPtr indicesV = Matrix::create(batchSize, 6, false, false);
+  auto* data = indicesV->getData();
+  for (size_t i = 0; i < batchSize; ++i) {
+    data[i * 2] = 2;
+    data[i * 2 + 1] = 4;
+    data[i * 2 + 2] = 16;
+    data[i * 2 + 3] = 32;
+    data[i * 2 + 4] = 16;
+    data[i * 2 + 5] = 32;
+  }
+  config.inputDefs.push_back({INPUT_SELF_DEFINE_DATA, "indices", indicesV, {}});
+  LayerInputConfig* input = config.layerConfig.add_inputs();
+  ScaleSubRegionConfig* scaleSubRegionConf =
+      input->mutable_scale_sub_region_conf();
+  ImageConfig* imgConf = scaleSubRegionConf->mutable_image_conf();
+  imgConf->set_img_size(32);
+  imgConf->set_img_size_y(32);
+  imgConf->set_channels(4);
+  scaleSubRegionConf->set_value(2.0);
+  config.layerConfig.add_inputs();
+
+  for (auto useGpu : {false, true}) {
+    testLayerGrad(config, "scale_sub_region", batchSize, false, useGpu, false);
+  }
+}
+
 int main(int argc, char** argv) {
   testing::InitGoogleTest(&argc, argv);
   initMain(argc, argv);

paddle/gserver/tests/test_MKLDNN.cpp

@@ -269,6 +269,7 @@ void testBatchNormLayer(const testBatchNormDesc& pm) {
 TEST(MKLDNNLayer, BatchNormLayer) {
   testBatchNormLayer({4, 10, 6, 6});
   testBatchNormLayer({16, 32, 16, 16});
+  testBatchNormLayer({4, 16, 8, 10});
 }
 
 struct testImageDesc {
@@ -300,13 +301,8 @@ void testAddtoLayer(const testImageDesc& pm, const size_t nInputs) {
   TestConfig dnnConfig;
   getAddtoConfig(dnnConfig, pm, nInputs);
   dnnConfig.layerConfig.set_type("mkldnn_addto");
-  // TODO(TJ): test with bias
-  for (auto withBias : {false}) {
-    if (withBias) {
-      dnnConfig.biasSize = pm.ic * pm.ih * pm.iw;
-    } else {
-      dnnConfig.biasSize = 0;
-    }
+  for (auto withBias : {false, true}) {
+    dnnConfig.biasSize = withBias ? pm.ic * pm.ih * pm.iw : 0;
     RUN_MKLDNN_TEST_LAYER(dnnConfig, "addto", pm)
   }
 }

paddle/math/MKLDNNMatrix.cpp

@@ -152,12 +152,7 @@ void MKLDNNMatrix::downSpatial() {
   }
   memory::desc md = memory::desc(dstDims, getDtype(), dstFmt);
   memory::primitive_desc pd = memory::primitive_desc(md, getEngine());
-  mkldnn_primitive_t result;
-  mkldnn::error::wrap_c_api(
-      mkldnn_primitive_create(&result, pd.get(), nullptr, nullptr),
-      "could not create a memory primitive");
-  reset(result);
-  set_data_handle(data_);
+  resetMKLDNNMemory(pd, data_);
 }
 
 }  // namespace paddle

paddle/math/MKLDNNMatrix.h

@@ -145,6 +145,27 @@ public:
     m_.reset();
   }
 
+  /**
+   * override the CpuMatrix::resize
+   */
+  void resize(size_t newHeight, size_t newWidth) override {
+    m_->resize(newHeight, newWidth);
+    if (data_ == m_->getData() && elementCnt_ == newHeight * newWidth) {
+      return;
+    }
+    CpuMatrix::setData(data_);
+    height_ = newHeight;
+    width_ = newWidth;
+    elementCnt_ = newHeight * newWidth;
+    stride_ = width_;
+    auto pd = mkldnn::memory::primitive_desc(
+        mkldnn::memory::desc({(int)newHeight, (int)newWidth},
+                             getDtype(),
+                             mkldnn::memory::format::nc),
+        getEngine());
+    resetMKLDNNMemory(pd, data_);
+  }
+
   /**
    * override Matrix::getData
    * check data before return
@@ -215,6 +236,17 @@ protected:
                    memory::format srcFmt,
                    memory::format dstFmt,
                    memory::dims dm);
+  /**
+   * reset this MKLDNN Memory from primitve desc
+   */
+  void resetMKLDNNMemory(memory::primitive_desc pd, real* data) {
+    mkldnn_primitive_t result;
+    mkldnn::error::wrap_c_api(
+        mkldnn_primitive_create(&result, pd.get(), nullptr, nullptr),
+        "could not create a memory primitive");
+    reset(result);
+    set_data_handle(data);
+  }
 
 private:
   // save the CpuMatrixPtr in case the buffer released outside

paddle/math/MathFunctions.cpp

@@ -206,7 +206,7 @@ double dotProduct<double>(const int n, const double* x, const double* y) {
 }
 #endif
 
-#if defined(PADDLE_USE_MKL) || defined(PADDLE_USE_MKLML)
+#if defined(PADDLE_USE_MKLML)
 
 template <>
 void vExp<float>(const int n, const float* a, float* r) {
@@ -295,38 +295,6 @@ template void vAdd(const int n, const double* a, const double* b, double* r);
 
 #endif
 
-#ifdef PADDLE_USE_MKL
-template <>
-void vInvSqrt<float>(const int n, const float* a, float* r) {
-  vsInvSqrt(n, a, r);
-}
-
-template <>
-void vInvSqrt<double>(const int n, const double* a, double* r) {
-  vdInvSqrt(n, a, r);
-}
-
-template <>
-void vLog1p<float>(const int n, const float* a, float* r) {
-  vsLog1p(n, a, r);
-}
-
-template <>
-void vLog1p<double>(const int n, const double* a, double* r) {
-  vdLog1p(n, a, r);
-}
-
-template <>
-void vTanh<float>(const int n, const float* a, float* r) {
-  vsTanh(n, a, r);
-}
-
-template <>
-void vTanh<double>(const int n, const double* a, double* r) {
-  vdTanh(n, a, r);
-}
-#else
-
 DEFINE_MATRIX_BINARY_OP(vInvSqrt, b = 1.0f / std::sqrt(a));
 template <class T>
 void vInvSqrt(const int n, const T* a, T* r) {
@@ -357,6 +325,4 @@ template void vLog1p(const int n, const double* a, double* r);
 template void vTanh(const int n, const float* a, float* r);
 template void vTanh(const int n, const double* a, double* r);
 
-#endif
-
 }  // namespace paddle

paddle/math/MathFunctions.h

@@ -21,11 +21,6 @@ limitations under the License. */
 #include <mkl_vml_functions.h>
 #endif
 
-#ifdef PADDLE_USE_MKL
-#include <mkl.h>
-#include <mkl_lapacke.h>
-#endif
-
 #if defined(PADDLE_USE_ATLAS) || defined(PADDLE_USE_VECLIB)
 extern "C" {
 #include <cblas.h>

paddle/math/tests/TensorCheck.h

@@ -169,7 +169,7 @@ void TensorCheck(AssertEq compare,
       count++;
     }
   }
-  EXPECT_EQ(count, 0) << "There are " << count << " different element.";
+  EXPECT_EQ(count, 0) << "There are " << count << " different elements.";
 }
 
 template <typename AssertEq, typename Tensor1, typename Tensor2>

paddle/operators/accuracy_op.cu

@@ -65,7 +65,7 @@ class AccuracyOpCUDAKernel : public framework::OpKernel<T> {
 
     size_t num_samples = inference->dims()[0];
     size_t infer_width = inference->dims()[1];
-    cudaMemset((void**)&accuracy_data, 0, sizeof(float));
+    PADDLE_ENFORCE(cudaMemset(accuracy_data, 0, sizeof(float)));
 
     if (num_samples == 0) {
       return;

paddle/operators/accuracy_op.h

@@ -14,7 +14,6 @@ limitations under the License. */
 
 #pragma once
 #include <algorithm>
-#include "paddle/framework/eigen.h"
 #include "paddle/framework/op_registry.h"
 
 namespace paddle {
@@ -22,18 +21,6 @@ namespace operators {
 
 using Tensor = framework::Tensor;
 
-template <typename T, int MajorType = Eigen::RowMajor,
-          typename IndexType = Eigen::DenseIndex>
-using EigenMatrix = framework::EigenMatrix<T, MajorType, IndexType>;
-
-template <typename T, int MajorType = Eigen::RowMajor,
-          typename IndexType = Eigen::DenseIndex>
-using EigenVector = framework::EigenVector<T, MajorType, IndexType>;
-
-template <typename T, int MajorType = Eigen::RowMajor,
-          typename IndexType = Eigen::DenseIndex>
-using EigenScalar = framework::EigenScalar<T, MajorType, IndexType>;
-
 template <typename Place, typename T>
 class AccuracyKernel : public framework::OpKernel<T> {
  public:

paddle/operators/array_operator.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+
+#pragma once
+#include "paddle/framework/lod_tensor_array.h"
+#include "paddle/framework/op_registry.h"
+
+namespace paddle {
+namespace operators {
+class ArrayOp : public framework::OperatorBase {
+ public:
+  ArrayOp(const std::string &type, const framework::VariableNameMap &inputs,
+          const framework::VariableNameMap &outputs,
+          const framework::AttributeMap &attrs)
+      : OperatorBase(type, inputs, outputs, attrs) {}
+
+ protected:
+  size_t GetOffset(const framework::Scope &scope,
+                   const platform::DeviceContext &dev_ctx) const {
+    auto *i = scope.FindVar(Input("I"));
+    PADDLE_ENFORCE(i != nullptr, "I must be set");
+    auto &i_tensor = i->Get<framework::LoDTensor>();
+    PADDLE_ENFORCE_EQ(i_tensor.numel(), 1);
+    size_t offset;
+    if (platform::is_gpu_place(i_tensor.place())) {
+      // FIXME: Avoid copy from GPU to CPU
+      framework::Tensor t;
+      t.CopyFrom(i_tensor, platform::CPUPlace(), dev_ctx);
+      dev_ctx.Wait();
+      offset = static_cast<size_t>(*t.data<int64_t>());
+    } else {
+      offset = static_cast<size_t>(*i_tensor.data<int64_t>());
+    }
+    return offset;
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle

paddle/operators/array_to_lod_tensor_op.cc

@@ -140,6 +140,23 @@ class ArrayToLoDTensorInferShape : public framework::InferShapeBase {
                    "ArrayToLoDTensorOp must has input X.");
     PADDLE_ENFORCE(context->HasInput("RankTable"),
                    "ArrayToLoDTensorOp must has input RankTable.");
+    context->SetOutputDim("Out", context->GetInputDim("X"));
+  }
+};
+
+class ArrayToLoDTensorGradMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+ protected:
+  std::unique_ptr<framework::OpDescBind> Apply() const override {
+    auto *grad_op = new framework::OpDescBind();
+    grad_op->SetType("lod_tensor_to_array");
+    grad_op->SetInput("X", OutputGrad("Out"));
+    grad_op->SetInput("RankTable", Input("RankTable"));
+    grad_op->SetOutput("Out", InputGrad("X"));
+    grad_op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDescBind>(grad_op);
   }
 };
 
@@ -149,4 +166,5 @@ class ArrayToLoDTensorInferShape : public framework::InferShapeBase {
 namespace ops = paddle::operators;
 REGISTER_OPERATOR(array_to_lod_tensor, ops::ArrayToLoDTensorOp,
                   ops::ArrayToLoDTensorOpProtoMaker,
-                  ops::ArrayToLoDTensorInferShape);
+                  ops::ArrayToLoDTensorInferShape,
+                  ops::ArrayToLoDTensorGradMaker);

paddle/operators/batch_norm_op.cc

@@ -19,9 +19,6 @@ namespace operators {
 
 using Tensor = framework::Tensor;
 using LoDTensor = framework::LoDTensor;
-template <typename T, int MajorType = Eigen::RowMajor,
-          typename IndexType = Eigen::DenseIndex>
-using EigenMatrix = framework::EigenMatrix<T, MajorType, IndexType>;
 
 template <typename T>
 using EigenArrayMap =

paddle/operators/chunk_eval_op.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "paddle/operators/chunk_eval_op.h"
+
+namespace paddle {
+namespace operators {
+
+class ChunkEvalOp : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+  void InferShape(framework::InferShapeContext *ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("Inference"),
+                   "Input(Inference) of ChunkEvalOp should not be null.");
+    PADDLE_ENFORCE(ctx->HasInput("Label"),
+                   "Input(Label) of ChunkEvalOp should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("Precision"),
+                   "Output(Precision) of ChunkEvalOp should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("Recall"),
+                   "Output(Recall) of ChunkEvalOp should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("F1-Score"),
+                   "Output(F1-Score) of ChunkEvalOp should not be null.");
+
+    auto inference_dim = ctx->GetInputDim("Inference");
+    auto label_dim = ctx->GetInputDim("Label");
+
+    PADDLE_ENFORCE(inference_dim == label_dim,
+                   "Inference's shape must be the same as Label's shape.");
+
+    ctx->SetOutputDim("Precision", {1});
+    ctx->SetOutputDim("Recall", {1});
+    ctx->SetOutputDim("F1-Score", {1});
+  }
+
+ protected:
+  framework::OpKernelType GetKernelType(
+      const framework::ExecutionContext &ctx) const override {
+    return framework::OpKernelType(framework::DataType::FP32,
+                                   ctx.device_context());
+  }
+};
+
+class ChunkEvalOpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  ChunkEvalOpMaker(framework::OpProto *proto,
+                   framework::OpAttrChecker *op_checker)
+      : OpProtoAndCheckerMaker(proto, op_checker) {
+    AddInput("Inference",
+             "(Tensor, default: Tensor<int>). Predictions from the network.");
+    AddInput("Label",
+             "(Tensor, default: Tensor<int>). The true tag sequences.");
+    AddOutput("Precision",
+              "(float). The evaluated precision (called positive predictive "
+              "value) of chunks on the given mini-batch.");
+    AddOutput("Recall",
+              "(float). The evaluated recall (true positive rate or "
+              "sensitivity) of chunks on the given mini-batch.");
+    AddOutput("F1-Score",
+              "(float). The evaluated F1-Score on the given mini-batch.");
+    AddAttr<int>("num_chunk_types",
+                 "(int). The number of chunk type. See below for details.");
+    AddAttr<std::string>(
+        "chunk_scheme",
+        "(string, default IOB). The labeling scheme indicating "
+        "how to encode the chunks. Must be IOB, IOE, IOBES or plain. See below "
+        "for details.")
+        .SetDefault("IOB");
+    AddAttr<std::vector<int>>("excluded_chunk_types",
+                              "(list<int>) A list including chunk type ids "
+                              "indicating chunk types that are not counted. "
+                              "See below for details.")
+        .SetDefault(std::vector<int>{});
+    AddComment(R"DOC(
+For some basics of chunking, please refer to
+‘Chunking with Support Vector Mechines <https://aclanthology.info/pdf/N/N01/N01-1025.pdf>’.
+
+
+CheckEvalOp computes the precision, recall, and F1-score of chunk detection,
+and supports IOB, IOE, IOBES and IO (also known as plain) tagging schemes.
+Here is a NER example of labeling for these tagging schemes:
+
+ 	     Li     Ming    works  at  Agricultural   Bank   of    China  in  Beijing.
+  IO:    I-PER  I-PER   O      O   I-ORG          I-ORG  I-ORG I-ORG  O   I-LOC
+  IOB:   B-PER  I-PER   O      O   B-ORG          I-ORG  I-ORG I-ORG  O   B-LOC
+  IOE:   I-PER  E-PER   O      O   I-ORG          I-ORG  I-ORG E-ORG  O   E-LOC
+  IOBES: B-PER  E-PER   O      O   I-ORG          I-ORG  I-ORG E-ORG  O   S-LOC
+
+There are three chunk types(named entity types) including PER(person), ORG(orgnazation)
+and LOC(LOCATION), and we can see that the labels have the form <tag type>-<chunk type>.
+
+Since the calculations actually use label ids rather than labels, extra attention
+should be paid when mapping labels to ids to make CheckEvalOp work. The key point
+is that the listed equations are satisfied by ids.
+
+    tag_type = label % num_tag_type
+    chunk_type = label / num_tag_type
+
+where `num_tag_type` is the num of tag types in the tagging scheme, `num_chunk_type`
+is the num of chunk types, and `tag_type` get its value from the following table.
+
+    Scheme Begin Inside End   Single
+     plain   0     -      -     -
+     IOB     0     1      -     -
+     IOE     -     0      1     -
+     IOBES   0     1      2     3
+
+Still use NER as example, assuming the tagging scheme is IOB while chunk types are ORG,
+PER and LOC. To satisfy the above equations, the label map can be like this:
+
+    B-ORG  0
+    I-ORG  1
+    B-PER  2
+    I-PER  3
+    B-LOC  4
+    I-LOC  5
+    O      6
+
+It’s not hard to verify the equations noting that the num of chunk types
+is 3 and the num of tag types in IOB scheme is 2. For example, the label
+id of I-LOC is 5, the tag type id of I-LOC is 1, and the chunk type id of
+I-LOC is 2, which consistent with the results from the equations.
+)DOC");
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+REGISTER_OP_WITHOUT_GRADIENT(chunk_eval, ops::ChunkEvalOp,
+                             ops::ChunkEvalOpMaker);
+REGISTER_OP_CPU_KERNEL(chunk_eval,
+                       ops::ChunkEvalKernel<paddle::platform::CPUPlace, float>);

paddle/operators/chunk_eval_op.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#pragma once
+#include <set>
+#include "paddle/framework/eigen.h"
+#include "paddle/framework/op_registry.h"
+
+namespace paddle {
+namespace operators {
+
+using Tensor = framework::Tensor;
+using LoDTensor = framework::LoDTensor;
+
+template <typename Place, typename T>
+class ChunkEvalKernel : public framework::OpKernel<T> {
+ public:
+  struct Segment {
+    int begin;
+    int end;
+    int type;
+    bool operator==(const Segment& y) const {
+      return begin == y.begin && end == y.end && type == y.type;
+    }
+  };
+
+  void GetSegments(const int* label, int length, std::vector<Segment>& segments,
+                   int num_chunk_types, int num_tag_types, int other_chunk_type,
+                   int tag_begin, int tag_inside, int tag_end,
+                   int tag_single) const {
+    segments.clear();
+    segments.reserve(length);
+    int chunk_start = 0;
+    bool in_chunk = false;
+    int tag = -1;
+    int type = other_chunk_type;
+    for (int i = 0; i < length; ++i) {
+      int prev_tag = tag;
+      int prev_type = type;
+      PADDLE_ENFORCE_LE(label[i], num_chunk_types * num_tag_types);
+      tag = label[i] % num_tag_types;
+      type = label[i] / num_tag_types;
+      if (in_chunk && ChunkEnd(prev_tag, prev_type, tag, type, other_chunk_type,
+                               tag_begin, tag_inside, tag_end, tag_single)) {
+        Segment segment{
+            chunk_start,  // begin
+            i - 1,        // end
+            prev_type,
+        };
+        segments.push_back(segment);
+        in_chunk = false;
+      }
+      if (ChunkBegin(prev_tag, prev_type, tag, type, other_chunk_type,
+                     tag_begin, tag_inside, tag_end, tag_single)) {
+        chunk_start = i;
+        in_chunk = true;
+      }
+    }
+    if (in_chunk) {
+      Segment segment{
+          chunk_start,  // begin
+          length - 1,   // end
+          type,
+      };
+      segments.push_back(segment);
+    }
+  }
+
+  bool ChunkEnd(int prev_tag, int prev_type, int tag, int type,
+                int other_chunk_type, int tag_begin, int tag_inside,
+                int tag_end, int tag_single) const {
+    if (prev_type == other_chunk_type) return false;
+    if (type == other_chunk_type) return true;
+    if (type != prev_type) return true;
+    if (prev_tag == tag_begin) return tag == tag_begin || tag == tag_single;
+    if (prev_tag == tag_inside) return tag == tag_begin || tag == tag_single;
+    if (prev_tag == tag_end) return true;
+    if (prev_tag == tag_single) return true;
+    return false;
+  }
+
+  bool ChunkBegin(int prev_tag, int prev_type, int tag, int type,
+                  int other_chunk_type, int tag_begin, int tag_inside,
+                  int tag_end, int tag_single) const {
+    if (prev_type == other_chunk_type) return type != other_chunk_type;
+    if (type == other_chunk_type) return false;
+    if (type != prev_type) return true;
+    if (tag == tag_begin) return true;
+    if (tag == tag_inside) return prev_tag == tag_end || prev_tag == tag_single;
+    if (tag == tag_end) return prev_tag == tag_end || prev_tag == tag_single;
+    if (tag == tag_single) return true;
+    return false;
+  }
+
+  void Compute(const framework::ExecutionContext& context) const override {
+    // initialize to parse configurations
+    int num_chunk_types, num_tag_types;
+    int other_chunk_type;
+    int tag_begin, tag_inside, tag_end, tag_single;
+    std::vector<Segment> label_segments;
+    std::vector<Segment> output_segments;
+    std::set<int> excluded_chunk_types;
+    int64_t num_output_segments = 0;
+    int64_t num_label_segments = 0;
+    int64_t num_correct = 0;
+    if (context.Attr<std::string>("chunk_scheme") == "IOB") {
+      num_tag_types = 2;
+      tag_begin = 0;
+      tag_inside = 1;
+      tag_end = -1;
+      tag_single = -1;
+    } else if (context.Attr<std::string>("chunk_scheme") == "IOE") {
+      num_tag_types = 2;
+      tag_begin = -1;
+      tag_inside = 0;
+      tag_end = 1;
+      tag_single = -1;
+    } else if (context.Attr<std::string>("chunk_scheme") == "IOBES") {
+      num_tag_types = 4;
+      tag_begin = 0;
+      tag_inside = 1;
+      tag_end = 2;
+      tag_single = 3;
+    } else if (context.Attr<std::string>("chunk_scheme") == "plain") {
+      num_tag_types = 1;
+      tag_begin = -1;
+      tag_inside = -1;
+      tag_end = -1;
+      tag_single = -1;
+    } else {
+      PADDLE_THROW("Unknown chunk scheme.");
+    }
+    other_chunk_type = num_chunk_types = context.Attr<int>("num_chunk_types");
+    excluded_chunk_types.insert(
+        context.Attr<std::vector<int>>("excluded_chunk_types").begin(),
+        context.Attr<std::vector<int>>("excluded_chunk_types").end());
+
+    auto* inference = context.Input<LoDTensor>("Inference");
+    auto* label = context.Input<LoDTensor>("Label");
+    auto* precision = context.Output<Tensor>("Precision");
+    auto* recall = context.Output<Tensor>("Recall");
+    auto* f1 = context.Output<Tensor>("F1-Score");
+
+    const int* inference_data = inference->data<int>();
+    const int* label_data = label->data<int>();
+    T* precision_data = precision->mutable_data<T>(context.GetPlace());
+    T* racall_data = recall->mutable_data<T>(context.GetPlace());
+    T* f1_data = f1->mutable_data<T>(context.GetPlace());
+
+    auto lod = label->lod();
+    PADDLE_ENFORCE_EQ(lod.size(), 1UL, "Only support one level sequence now.");
+    PADDLE_ENFORCE(lod == inference->lod(),
+                   "LoD must be same between Inference and Label.");
+    int num_sequences = lod[0].size() - 1;
+    for (int i = 0; i < num_sequences; ++i) {
+      int seq_length = lod[0][i + 1] - lod[0][i];
+      EvalOneSeq(inference_data + lod[0][i], label_data + lod[0][i], seq_length,
+                 output_segments, label_segments, num_output_segments,
+                 num_label_segments, num_correct, num_chunk_types,
+                 num_tag_types, other_chunk_type, tag_begin, tag_inside,
+                 tag_end, tag_single, excluded_chunk_types);
+    }
+    *precision_data = !num_output_segments ? 0 : static_cast<T>(num_correct) /
+                                                     num_output_segments;
+    *racall_data = !num_label_segments ? 0 : static_cast<T>(num_correct) /
+                                                 num_label_segments;
+    *f1_data = !num_correct ? 0 : 2 * (*precision_data) * (*racall_data) /
+                                      ((*precision_data) + (*racall_data));
+  }
+
+  void EvalOneSeq(const int* output, const int* label, int length,
+                  std::vector<Segment>& output_segments,
+                  std::vector<Segment>& label_segments,
+                  int64_t& num_output_segments, int64_t& num_label_segments,
+                  int64_t& num_correct, int num_chunk_types, int num_tag_types,
+                  int other_chunk_type, int tag_begin, int tag_inside,
+                  int tag_end, int tag_single,
+                  const std::set<int>& excluded_chunk_types) const {
+    GetSegments(output, length, output_segments, num_chunk_types, num_tag_types,
+                other_chunk_type, tag_begin, tag_inside, tag_end, tag_single);
+    GetSegments(label, length, label_segments, num_chunk_types, num_tag_types,
+                other_chunk_type, tag_begin, tag_inside, tag_end, tag_single);
+    size_t i = 0, j = 0;
+    while (i < output_segments.size() && j < label_segments.size()) {
+      if (output_segments[i] == label_segments[j] &&
+          excluded_chunk_types.count(output_segments[i].type) != 1) {
+        ++num_correct;
+      }
+      if (output_segments[i].end < label_segments[j].end) {
+        ++i;
+      } else if (output_segments[i].end > label_segments[j].end) {
+        ++j;
+      } else {
+        ++i;
+        ++j;
+      }
+    }
+    for (auto& segment : label_segments) {
+      if (excluded_chunk_types.count(segment.type) != 1) ++num_label_segments;
+    }
+    for (auto& segment : output_segments) {
+      if (excluded_chunk_types.count(segment.type) != 1) ++num_output_segments;
+    }
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle

paddle/operators/clip_by_norm_op.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+
+#include "paddle/operators/clip_by_norm_op.h"
+
+namespace paddle {
+namespace operators {
+
+class ClipByNormOp : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+ protected:
+  void InferShape(framework::InferShapeContext* ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("X"),
+                   "Input(X) of ClipByNormOp should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("Out"),
+                   "Output(Out) of ClipByNormOp should not be null.");
+    auto max_norm = ctx->Attrs().Get<float>("max_norm");
+    PADDLE_ENFORCE_GT(max_norm, 0, "max_norm should be greater than 0.");
+    auto x_dims = ctx->GetInputDim("X");
+    ctx->SetOutputDim("Out", x_dims);
+    ctx->ShareLoD("X", /*->*/ "Out");
+  }
+};
+
+class ClipByNormOpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  ClipByNormOpMaker(framework::OpProto* proto,
+                    framework::OpAttrChecker* op_checker)
+      : OpProtoAndCheckerMaker(proto, op_checker) {
+    AddInput("X",
+             "(Tensor) The input of clip_by_norm op."
+             "The number of dimensions must be between [1, 9].");
+    AddOutput("Out",
+              "(Tensor) The output of clip_by_norm op with shape as input(X)");
+    AddAttr<float>("max_norm", "(float) The maximum norm value.");
+    AddComment(R"DOC(
+ClipByNorm operator limits the L2 norm of the input 'X' within 'max_norm'. 
+If the L2 norm of 'X' is less than or equal to 'max_norm', 'Out' will be 
+the same as 'X'. If the L2 norm of 'X' is greater than 'max_norm', 'X' will 
+be linearly scaled to make the L2 norm of 'Out' equal to 'max_norm', as 
+shown in the following formula：
+
+'Out' = 'max_norm' * 'X' / norm('X'),
+
+where norm('X') represents the L2 norm of 'X'.
+)DOC");
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+REGISTER_OP_WITHOUT_GRADIENT(clip_by_norm, ops::ClipByNormOp,
+                             ops::ClipByNormOpMaker);
+REGISTER_OP_CPU_KERNEL(
+    clip_by_norm, ops::ClipByNormKernel<paddle::platform::CPUPlace, float>);

paddle/operators/increment_op.cu → paddle/operators/clip_by_norm_op.cu

@@ -12,11 +12,8 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#include "paddle/operators/increment_op.h"
+#include "paddle/operators/clip_by_norm_op.h"
 
+namespace ops = paddle::operators;
 REGISTER_OP_GPU_KERNEL(
-    increment,
-    paddle::operators::IncrementKernel<paddle::platform::GPUPlace, float>,
-    paddle::operators::IncrementKernel<paddle::platform::GPUPlace, double>,
-    paddle::operators::IncrementKernel<paddle::platform::GPUPlace, int>,
-    paddle::operators::IncrementKernel<paddle::platform::GPUPlace, int64_t>);
+    clip_by_norm, ops::ClipByNormKernel<paddle::platform::GPUPlace, float>);

paddle/operators/increment_op.h → paddle/operators/clip_by_norm_op.h

@@ -16,23 +16,35 @@
 
 #include "paddle/framework/eigen.h"
 #include "paddle/framework/op_registry.h"
+#include "paddle/platform/transform.h"
 
 namespace paddle {
 namespace operators {
-template <typename Place, typename T>
-class IncrementKernel : public framework::OpKernel<T> {
- public:
-  virtual void Compute(const framework::ExecutionContext& context) const {
-    auto* tensor = context.Output<framework::Tensor>("Out");
-    auto* in = context.Input<framework::Tensor>("X");
-    tensor->mutable_data<T>(in->place());
 
-    auto step = static_cast<T>(context.Attr<float>("step"));
+using Tensor = framework::Tensor;
+template <typename T, int MajorType = Eigen::RowMajor,
+          typename IndexType = Eigen::DenseIndex>
+using EigenVector = framework::EigenVector<T, MajorType, IndexType>;
 
-    auto eigen_out = framework::EigenVector<T>::Flatten(*tensor);
-    auto eigen_in = framework::EigenVector<T>::Flatten(*in);
-    auto& place = context.GetEigenDevice<Place>();
-    eigen_out.device(place) = eigen_in + step;
+template <typename Place, typename T>
+class ClipByNormKernel : public framework::OpKernel<T> {
+ public:
+  void Compute(const framework::ExecutionContext& context) const override {
+    auto max_norm = context.Attr<T>("max_norm");
+    auto* input = context.Input<Tensor>("X");
+    auto* output = context.Output<Tensor>("Out");
+    output->mutable_data<T>(context.GetPlace());
+
+    auto x = EigenVector<T>::Flatten(*input);
+    auto out = EigenVector<T>::Flatten(*output);
+    auto x_norm = x.square().sum().sqrt();
+    auto place = context.GetEigenDevice<Place>();
+
+    auto temp = (x_norm <= max_norm).template cast<T>().eval();
+    auto scaling = temp + (static_cast<T>(1) - temp) * max_norm / x_norm;
+    Eigen::array<int, 1> one_dim{{1}};
+    Eigen::DSizes<int, 1> m_dsize(input->numel());
+    out.device(place) = x * scaling.reshape(one_dim).broadcast(m_dsize);
   }
 };
 

paddle/operators/compare_op.cc

@@ -14,6 +14,7 @@
 
 #include "paddle/operators/compare_op.h"
 #include "paddle/framework/op_registry.h"
+
 namespace paddle {
 namespace operators {
 template <typename OpComment>
@@ -61,6 +62,20 @@ class CompareOpInferShape : public framework::InferShapeBase {
   }
 };
 
+class CompareOp : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+ protected:
+  framework::OpKernelType GetKernelType(
+      const framework::ExecutionContext &ctx) const override {
+    framework::OpKernelType kt = OperatorWithKernel::GetKernelType(ctx);
+    // CompareOp kernel's device type is decided by input tensor place
+    kt.place_ = ctx.Input<framework::LoDTensor>("X")->place();
+    return kt;
+  }
+};
+
 }  // namespace operators
 }  // namespace paddle
 
@@ -71,8 +86,9 @@ class CompareOpInferShape : public framework::InferShapeBase {
   };                                                                 \
   char _##op_type##Comment::type[]{#op_type};                        \
   char _##op_type##Comment::equation[]{_equation};                   \
-  REGISTER_OP_WITH_KERNEL(                                                    \
-      op_type, ::paddle::operators::CompareOpProtoMaker<_##op_type##Comment>, \
+  REGISTER_OPERATOR(                                                 \
+      op_type, ::paddle::operators::CompareOp,                       \
+      ::paddle::operators::CompareOpProtoMaker<_##op_type##Comment>, \
       ::paddle::operators::CompareOpInferShape<_##op_type##Comment>, \
       ::paddle::framework::EmptyGradOpMaker);
 

paddle/operators/expand_op.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "paddle/operators/expand_op.h"
+
+namespace paddle {
+namespace operators {
+
+using framework::Tensor;
+
+class ExpandOp : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+ protected:
+  void InferShape(framework::InferShapeContext* ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("X"), "Input(X) should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("Out"), "Output(Out) should not be null.");
+
+    std::vector<int> expand_times =
+        ctx->Attrs().Get<std::vector<int>>("expand_times");
+    auto x_dims = ctx->GetInputDim("X");
+
+    PADDLE_ENFORCE_EQ(static_cast<size_t>(x_dims.size()), expand_times.size(),
+                      "The number of Attr(expand_times)'s value must be equal "
+                      "to the rank of Input(X).");
+    PADDLE_ENFORCE_LE(x_dims.size(), 6,
+                      "The rank of Input(X) must not be greater than 6.");
+
+    std::vector<int64_t> out_shape(x_dims.size());
+    for (size_t i = 0; i < expand_times.size(); ++i) {
+      PADDLE_ENFORCE_GE(expand_times[i], 1,
+                        "Each value of Attr(expand_times) should not be "
+                        "less than 1.");
+      out_shape[i] = x_dims[i] * expand_times[i];
+    }
+
+    ctx->SetOutputDim("Out", framework::make_ddim(out_shape));
+    if (out_shape[0] == x_dims[0]) {
+      ctx->ShareLoD("X", "Out");
+    }
+  }
+};
+
+class ExpandOpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  ExpandOpMaker(framework::OpProto* proto, framework::OpAttrChecker* op_checker)
+      : OpProtoAndCheckerMaker(proto, op_checker) {
+    AddInput("X",
+             "(Tensor, default Tensor<float>) A tensor with rank in [1, 6]."
+             "X is the input tensor to be expanded.");
+    AddOutput("Out",
+              "(Tensor, default Tensor<float>) A tensor with rank in [1, 6]."
+              "The rank of Output(Out) is same as Input(X) except that each "
+              "dimension size of Output(Out) is equal to corresponding "
+              "dimension size of Input(X) multiplying corresponding value of "
+              "Attr(expand_times).");
+    AddAttr<std::vector<int>>("expand_times",
+                              "Expand times number for each dimension.");
+    AddComment(R"DOC(
+Expand operator tiles the input by given times number. You should set times
+number for each dimension by providing attribute 'expand_times'. The rank of X
+should be in [1, 6]. Please notice that size of 'expand_times' must be same with
+X's rank. Following is a using case:
+
+Input(X) is a 3-D tensor with shape [2, 3, 1]:
+
+        [
+           [[1], [2], [3]],
+           [[4], [5], [6]]
+        ]
+
+Attr(expand_times):  [1, 2, 2]
+
+Output(Out) is a 3-D tensor with shape [2, 6, 2]:
+
+        [
+            [[1, 1], [2, 2], [3, 3], [1, 1], [2, 2], [3, 3]],
+            [[4, 4], [5, 5], [6, 6], [4, 4], [5, 5], [6, 6]]
+        ]
+
+)DOC");
+  }
+};
+
+class ExpandGradOp : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+ protected:
+  void InferShape(framework::InferShapeContext* ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("X"), "Input(X) should not be null.");
+    PADDLE_ENFORCE(ctx->HasInput(framework::GradVarName("Out")),
+                   "Input(Out@GRAD) should not be null.");
+
+    auto x_dims = ctx->GetInputDim("X");
+    std::vector<int> expand_times =
+        ctx->Attrs().Get<std::vector<int>>("expand_times");
+    auto out_dims = ctx->GetInputDim(framework::GradVarName("Out"));
+
+    for (size_t i = 0; i < expand_times.size(); ++i) {
+      PADDLE_ENFORCE_EQ(x_dims[i] * expand_times[i], out_dims[i],
+                        "Each dimension size of Input(Out@GRAD) should be "
+                        "equal to multiplication of crroresponding dimension "
+                        "size of Input(X) and Attr(expand_times) value.");
+    }
+
+    auto x_grad_name = framework::GradVarName("X");
+
+    if (ctx->HasOutput(x_grad_name)) {
+      ctx->SetOutputDim(x_grad_name, x_dims);
+    }
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+REGISTER_OP(expand, ops::ExpandOp, ops::ExpandOpMaker, expand_grad,
+            ops::ExpandGradOp);
+REGISTER_OP_CPU_KERNEL(expand,
+                       ops::ExpandKernel<paddle::platform::CPUPlace, float>);
+REGISTER_OP_CPU_KERNEL(
+    expand_grad, ops::ExpandGradKernel<paddle::platform::CPUPlace, float>);

paddle/operators/fill_constant_op.cu → paddle/operators/expand_op.cu

@@ -13,12 +13,11 @@
    limitations under the License. */
 
 #define EIGEN_USE_GPU
-#include "paddle/framework/op_registry.h"
-#include "paddle/operators/fill_constant_op.h"
+
+#include "paddle/operators/expand_op.h"
 
 namespace ops = paddle::operators;
+REGISTER_OP_GPU_KERNEL(expand,
+                       ops::ExpandKernel<paddle::platform::GPUPlace, float>);
 REGISTER_OP_GPU_KERNEL(
-    fill_constant, ops::FillConstantOpKernel<paddle::platform::GPUPlace, float>,
-    ops::FillConstantOpKernel<paddle::platform::GPUPlace, double>,
-    ops::FillConstantOpKernel<paddle::platform::GPUPlace, int>,
-    ops::FillConstantOpKernel<paddle::platform::GPUPlace, int64_t>);
+    expand_grad, ops::ExpandGradKernel<paddle::platform::GPUPlace, float>);

paddle/operators/expand_op.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   You may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+
+#pragma once
+
+#include <boost/preprocessor/arithmetic/div.hpp>
+#include <boost/preprocessor/arithmetic/mod.hpp>
+#include <boost/preprocessor/comparison/greater.hpp>
+#include <boost/preprocessor/comparison/greater_equal.hpp>
+#include <boost/preprocessor/control/if.hpp>
+#include <boost/preprocessor/repetition/repeat.hpp>
+#include <iostream>
+#include "paddle/framework/eigen.h"
+#include "paddle/framework/op_registry.h"
+#include "paddle/framework/operator.h"
+
+#define MAX_RANK_SUPPORTED 6
+
+#define EXPAND_TEMPLATE(z, n, data) \
+  case n + 1: {                     \
+    Expand<n + 1>(context);         \
+    break;                          \
+  }
+#define REP_EXPAND_TEMPLATE(n) BOOST_PP_REPEAT(n, EXPAND_TEMPLATE, ~)
+#define COND(n)                                               \
+  BOOST_PP_GREATER_EQUAL(BOOST_PP_DIV(n, MAX_RANK_SUPPORTED), \
+                         BOOST_PP_MOD(n, MAX_RANK_SUPPORTED))
+#define EXPAND_GRAD_CASE(n)                                        \
+  case n: {                                                        \
+    ExpandBackward<n>(context, reshape_dims_vec, reduce_dims_vec); \
+    break;                                                         \
+  }
+#define EXPAND_GRAD_TEMPLATE(z, n, data) \
+  BOOST_PP_IF(COND(n), EXPAND_GRAD_CASE(n), )
+#define REP_EXPAND_GRAD_TEMPLATE(n) BOOST_PP_REPEAT(n, EXPAND_GRAD_TEMPLATE, ~)
+
+namespace paddle {
+namespace operators {
+
+using Tensor = framework::Tensor;
+template <typename T, int MajorType = Eigen::RowMajor,
+          typename IndexType = Eigen::DenseIndex>
+using EigenVector = framework::EigenVector<T, MajorType, IndexType>;
+template <typename T, size_t D, int MajorType = Eigen::RowMajor,
+          typename IndexType = Eigen::DenseIndex>
+using EigenTensor = framework::EigenTensor<T, D, MajorType, IndexType>;
+
+template <typename Place, typename T>
+class ExpandKernel : public framework::OpKernel<T> {
+ public:
+  void Compute(const framework::ExecutionContext& context) const override {
+    auto rank = context.Input<Tensor>("X")->dims().size();
+    switch (rank) {
+      REP_EXPAND_TEMPLATE(MAX_RANK_SUPPORTED)
+      default:
+        PADDLE_ENFORCE(false,
+                       "Only support tensor with rank being between 1 and 6.");
+    }
+  }
+
+ protected:
+  template <int Rank>
+  void Expand(const framework::ExecutionContext& context) const {
+    auto* in0 = context.Input<Tensor>("X");
+    auto& expand_times = context.Attr<std::vector<int>>("expand_times");
+    auto* out0 = context.Output<Tensor>("Out");
+    Eigen::DSizes<int, Rank> bcast_dims;
+    auto x_dims = in0->dims();
+    for (size_t i = 0; i < expand_times.size(); ++i) {
+      bcast_dims[i] = expand_times[i];
+    }
+    auto x = EigenTensor<T, Rank>::From(*in0);
+    out0->mutable_data<T>(context.GetPlace());
+    auto y = EigenTensor<T, Rank>::From(*out0);
+    auto place = context.GetEigenDevice<Place>();
+    y.device(place) = x.broadcast(bcast_dims);
+  }
+};
+
+template <typename Place, typename T>
+class ExpandGradKernel : public framework::OpKernel<T> {
+ public:
+  void Compute(const framework::ExecutionContext& context) const override {
+    auto* in0 = context.Input<Tensor>("X");
+    auto& expand_times = context.Attr<std::vector<int>>("expand_times");
+    auto x_dims = in0->dims();
+    // 1. reshape_dims_vec is the broadcast parameter. For each dimension i,
+    //    if expand_times[i] > 1 and x_dims[i] > 1, i will be splitted to two
+    //    dimensions [expand_times[i], x_dims[i]].
+    // 2. reduce_dims_vec is the dimension parameter to compute gradients. For
+    //    each dimension expanded, the gradients should be summed to original
+    //    size.
+    std::vector<int> reshape_dims_vec;
+    std::vector<int> reduce_dims_vec;
+    for (size_t i = 0; i < expand_times.size(); ++i) {
+      if (expand_times[i] == 1) {
+        reshape_dims_vec.push_back(x_dims[i]);
+      } else {
+        if (x_dims[i] == 1) {
+          reduce_dims_vec.push_back(reshape_dims_vec.size());
+          reshape_dims_vec.push_back(expand_times[i]);
+        } else {
+          reduce_dims_vec.push_back(reshape_dims_vec.size());
+          reshape_dims_vec.push_back(expand_times[i]);
+          reshape_dims_vec.push_back(x_dims[i]);
+        }
+      }
+    }
+
+    int dims = reshape_dims_vec.size() * MAX_RANK_SUPPORTED +
+               reduce_dims_vec.size() - MAX_RANK_SUPPORTED - 1;
+    // no need reduce, just copy
+    if (reduce_dims_vec.size() == 0) {
+      auto* in0 = context.Input<Tensor>(framework::GradVarName("Out"));
+      auto* out0 = context.Output<Tensor>(framework::GradVarName("X"));
+      out0->mutable_data<T>(context.GetPlace());
+      out0->CopyFrom(*in0, context.GetPlace(), context.device_context());
+    } else {
+      switch (dims) {
+        REP_EXPAND_GRAD_TEMPLATE(72)
+        default:
+          PADDLE_ENFORCE(
+              false, "Only support tensor with rank being between 1 and 6.");
+      }
+    }
+  }
+
+ protected:
+  template <int Dims>
+  void ExpandBackward(const framework::ExecutionContext& context,
+                      const std::vector<int>& reshape_dims_vec,
+                      const std::vector<int>& reduce_dims_vec) const {
+    size_t reshape_size = Dims / MAX_RANK_SUPPORTED + 1;
+    size_t reduce_size = Dims % MAX_RANK_SUPPORTED + 1;
+    PADDLE_ENFORCE_EQ(reshape_size, reshape_dims_vec.size(),
+                      "Inconsistent size between template Dims and "
+                      "reshape dimensions.");
+    PADDLE_ENFORCE_EQ(reduce_size, reduce_dims_vec.size(),
+                      "Inconsistent size between template Dims and "
+                      "reduce dimensions.");
+    auto* in0 = context.Input<Tensor>(framework::GradVarName("Out"));
+    auto* out0 = context.Output<Tensor>(framework::GradVarName("X"));
+    auto x = EigenVector<T>::Flatten(*(context.Input<Tensor>("X")));
+    out0->mutable_data<T>(context.GetPlace());
+    auto x_grad = EigenVector<T>::Flatten(*out0);
+    Eigen::DSizes<int, Dims / MAX_RANK_SUPPORTED + 1> reshape_dims;
+    for (size_t i = 0; i < reshape_size; ++i) {
+      reshape_dims[i] = reshape_dims_vec[i];
+    }
+    Eigen::DSizes<int, Dims % MAX_RANK_SUPPORTED + 1> reduce_dims;
+    for (size_t i = 0; i < reduce_size; ++i) {
+      reduce_dims[i] = reduce_dims_vec[i];
+    }
+    auto out_grad = EigenVector<T>::Flatten(*in0);
+    x_grad.device(context.GetEigenDevice<Place>()) =
+        out_grad.reshape(reshape_dims).sum(reduce_dims).reshape(x.dimensions());
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle

paddle/operators/fill_constant_batch_size_like_op.cc

@@ -75,10 +75,10 @@ class FillConstantBatchSizeLikeOpMaker
               "with the specified value");
     AddAttr<std::vector<int>>("shape", "(vector<int>) The shape of the output");
     AddAttr<int>("input_dim_idx",
-                 "(int, default 0) the index of input's batch size dimension")
+                 "(int, default 0) The index of input's batch size dimension")
         .SetDefault(0);
     AddAttr<int>("output_dim_idx",
-                 "(int, default 0) the index of output's batch size dimension")
+                 "(int, default 0) The index of output's batch size dimension")
         .SetDefault(0);
     AddAttr<float>("value", "(float, default 0) The value to be filled")
         .SetDefault(0.0f);

paddle/operators/fill_constant_batch_size_like_op.cu

@@ -12,7 +12,6 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#define EIGEN_USE_GPU
 #include "paddle/framework/op_registry.h"
 #include "paddle/operators/fill_constant_batch_size_like_op.h"
 

paddle/operators/fill_constant_batch_size_like_op.h

@@ -13,8 +13,8 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #pragma once
-#include "paddle/framework/eigen.h"
 #include "paddle/framework/op_registry.h"
+#include "paddle/operators/math/math_function.h"
 
 namespace paddle {
 namespace operators {
@@ -27,9 +27,8 @@ class FillConstantBatchSizeLikeOpKernel : public framework::OpKernel<T> {
     out->mutable_data<T>(ctx.GetPlace());
     auto value = ctx.Attr<float>("value");
 
-    auto out_eigen = framework::EigenVector<T>::Flatten(*out);
-    auto place = ctx.GetEigenDevice<Place>();
-    out_eigen.device(place) = out_eigen.constant(static_cast<T>(value));
+    math::SetConstant<Place, T> setter;
+    setter(ctx.device_context(), out, static_cast<T>(value));
   }
 };
 

paddle/operators/fill_constant_op.cc

@@ -12,33 +12,41 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
-#include "paddle/operators/fill_constant_op.h"
+#include "paddle/framework/data_type.h"
+#include "paddle/framework/op_registry.h"
+#include "paddle/operators/math/math_function.h"
 
 namespace paddle {
 namespace operators {
 
-class FillConstantOp : public framework::OperatorWithKernel {
+class FillConstantInferShape : public framework::InferShapeBase {
  public:
-  using framework::OperatorWithKernel::OperatorWithKernel;
-
-  void InferShape(framework::InferShapeContext *ctx) const override {
+  void operator()(framework::InferShapeContext *ctx) const override {
     PADDLE_ENFORCE(ctx->HasOutput("Out"),
                    "Output(Out) of FillConstantOp should not be null.");
     auto &shape = ctx->Attrs().Get<std::vector<int>>("shape");
-    std::vector<int64_t> shape_int64(shape.size(), 0);
-    std::transform(shape.begin(), shape.end(), shape_int64.begin(),
-                   [](int a) { return static_cast<int64_t>(a); });
-    auto dims = framework::make_ddim(shape_int64);
-    ctx->SetOutputDim("Out", dims);
+    ctx->SetOutputDim("Out", framework::make_ddim(shape));
   }
+};
 
- protected:
-  framework::OpKernelType GetKernelType(
-      const framework::ExecutionContext &ctx) const override {
-    int data_type = ctx.Attr<int>("data_type");
-    VLOG(10) << " FillConstant data_type = " << data_type;
-    return framework::OpKernelType(static_cast<framework::DataType>(data_type),
-                                   ctx.device_context());
+class FillConstantOp : public framework::OperatorBase {
+ public:
+  using framework::OperatorBase::OperatorBase;
+  void Run(const framework::Scope &scope,
+           const platform::DeviceContext &dev_ctx) const override {
+    auto data_type = static_cast<framework::DataType>(Attr<int>("data_type"));
+    auto value = Attr<float>("value");
+    auto force_cpu = Attr<bool>("force_cpu");
+    auto &out =
+        *scope.FindVar(Output("Out"))->GetMutable<framework::LoDTensor>();
+    out.Resize(framework::make_ddim(Attr<std::vector<int>>("shape")));
+    if (force_cpu) {
+      auto cpu = platform::CPUPlace();
+      out.mutable_data(cpu, framework::ToTypeIndex(data_type));
+    } else {
+      out.mutable_data(dev_ctx.GetPlace(), framework::ToTypeIndex(data_type));
+    }
+    math::set_constant(dev_ctx, &out, value);
   }
 };
 
@@ -54,6 +62,11 @@ class FillConstantOpMaker : public framework::OpProtoAndCheckerMaker {
     AddAttr<std::vector<int>>("shape", "(vector<int>) The shape of the output");
     AddAttr<float>("value", "(float, default 0) The value to be filled")
         .SetDefault(0.0f);
+    AddAttr<bool>("force_cpu",
+                  "(bool, default false) Force fill output variable to cpu "
+                  "memory. Otherwise, fill output variable to the running "
+                  "device")
+        .SetDefault(false);
     AddOutput("Out",
               "(Tensor) Tensor of specified shape will be filled "
               "with the specified value");
@@ -69,10 +82,6 @@ Fill up a variable with specified constant value.
 }  // namespace paddle
 
 namespace ops = paddle::operators;
-REGISTER_OP_WITHOUT_GRADIENT(fill_constant, ops::FillConstantOp,
-                             ops::FillConstantOpMaker);
-REGISTER_OP_CPU_KERNEL(
-    fill_constant, ops::FillConstantOpKernel<paddle::platform::CPUPlace, float>,
-    ops::FillConstantOpKernel<paddle::platform::CPUPlace, double>,
-    ops::FillConstantOpKernel<paddle::platform::CPUPlace, int>,
-    ops::FillConstantOpKernel<paddle::platform::CPUPlace, int64_t>);
+REGISTER_OPERATOR(fill_constant, ops::FillConstantOp,
+                  ops::FillConstantInferShape, ops::FillConstantOpMaker,
+                  paddle::framework::EmptyGradOpMaker);

paddle/operators/fill_zeros_like_op.cu

@@ -12,7 +12,6 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#define EIGEN_USE_GPU
 #include "paddle/framework/op_registry.h"
 #include "paddle/operators/fill_zeros_like_op.h"
 

paddle/operators/fill_zeros_like_op.h

@@ -13,8 +13,8 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #pragma once
-#include "paddle/framework/eigen.h"
 #include "paddle/framework/op_registry.h"
+#include "paddle/operators/math/math_function.h"
 
 namespace paddle {
 namespace operators {
@@ -23,10 +23,11 @@ template <typename Place, typename T>
 class FillZerosLikeKernel : public framework::OpKernel<T> {
  public:
   void Compute(const framework::ExecutionContext& context) const override {
-    auto* output = context.Output<framework::Tensor>("Y");
-    output->mutable_data<T>(context.GetPlace());
-    auto t = framework::EigenVector<T>::Flatten(*output);
-    t.device(context.GetEigenDevice<Place>()) = t.constant(static_cast<T>(0));
+    auto* out = context.Output<framework::Tensor>("Y");
+    out->mutable_data<T>(context.GetPlace());
+
+    math::SetConstant<Place, T> setter;
+    setter(context.device_context(), out, static_cast<T>(0));
   }
 };
 

paddle/operators/increment_op.cc

@@ -12,22 +12,57 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#include "paddle/operators/increment_op.h"
+#include "paddle/framework/op_registry.h"
 
 namespace paddle {
 namespace operators {
 
-class IncrementOp : public framework::OperatorWithKernel {
+class IncrementInferShape : public framework::InferShapeBase {
  public:
-  using framework::OperatorWithKernel::OperatorWithKernel;
-
-  void InferShape(framework::InferShapeContext *ctx) const override {
+  void operator()(framework::InferShapeContext *ctx) const override {
     PADDLE_ENFORCE(ctx->HasInput("X"),
                    "Input(X) of IncrementOp should not be null.");
     PADDLE_ENFORCE(ctx->HasOutput("Out"),
                    "Output(Out) of IncrementOp should not be null.");
+    PADDLE_ENFORCE_EQ(1, framework::product(ctx->GetInputDim("X")));
     ctx->SetOutputDim("Out", ctx->GetInputDim("X"));
-    ctx->ShareLoD("X", /*->*/ "Out");
+  }
+};
+
+struct IncrementFunctor {
+  IncrementFunctor(const framework::LoDTensor &x, framework::LoDTensor *out,
+                   float value)
+      : x_(x), out_(out), value_(value) {}
+
+  template <typename T>
+  void operator()() const {
+    *out_->data<T>() = *x_.data<T>() + static_cast<T>(value_);
+  }
+
+  const framework::LoDTensor &x_;
+  framework::LoDTensor *out_;
+  float value_;
+};
+
+class IncrementOp : public framework::OperatorBase {
+ public:
+  IncrementOp(const std::string &type, const framework::VariableNameMap &inputs,
+              const framework::VariableNameMap &outputs,
+              const framework::AttributeMap &attrs)
+      : OperatorBase(type, inputs, outputs, attrs) {}
+
+  void Run(const framework::Scope &scope,
+           const platform::DeviceContext &dev_ctx) const override {
+    auto &x = scope.FindVar(Input("X"))->Get<framework::LoDTensor>();
+    auto &out =
+        *scope.FindVar(Output("Out"))->GetMutable<framework::LoDTensor>();
+
+    PADDLE_ENFORCE(platform::is_cpu_place(x.place()));
+    out.Resize(x.dims());
+    out.mutable_data(x.place(), x.type());
+    float value = Attr<float>("step");
+    framework::VisitDataType(framework::ToDataType(out.type()),
+                             IncrementFunctor(x, &out, value));
   }
 };
 
@@ -59,10 +94,10 @@ class IncrementGradOpMaker : public framework::SingleGradOpDescMaker {
 
   std::unique_ptr<framework::OpDescBind> Apply() const override {
     auto *grad_op = new framework::OpDescBind();
-    grad_op->SetType("scale");
-    grad_op->SetInput("X", OutputGrad("Out"));
-    grad_op->SetOutput("Out", InputGrad("X"));
-    grad_op->SetAttr("scale", 1.0f);
+    grad_op->SetType("increment");
+    grad_op->SetInput("X", Output("Out"));
+    grad_op->SetOutput("Out", Input("X"));
+    grad_op->SetAttr("step", -boost::get<float>(GetAttr("step")));
     return std::unique_ptr<framework::OpDescBind>(grad_op);
   }
 };
@@ -71,11 +106,5 @@ class IncrementGradOpMaker : public framework::SingleGradOpDescMaker {
 }  // namespace paddle
 
 namespace ops = paddle::operators;
-
-REGISTER_OPERATOR(increment, ops::IncrementOp, ops::IncrementOpMaker,
-                  ops::IncrementGradOpMaker);
-REGISTER_OP_CPU_KERNEL(
-    increment, ops::IncrementKernel<paddle::platform::CPUPlace, float>,
-    ops::IncrementKernel<paddle::platform::CPUPlace, double>,
-    ops::IncrementKernel<paddle::platform::CPUPlace, int>,
-    ops::IncrementKernel<paddle::platform::CPUPlace, int64_t>);
+REGISTER_OPERATOR(increment, ops::IncrementOp, ops::IncrementInferShape,
+                  ops::IncrementOpMaker, ops::IncrementGradOpMaker);

paddle/operators/lod_array_length_op.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+
+#include "paddle/framework/lod_tensor_array.h"
+#include "paddle/framework/op_registry.h"
+
+namespace paddle {
+namespace operators {
+
+class LoDArrayLengthOp : public framework::OperatorBase {
+ public:
+  LoDArrayLengthOp(const std::string &type,
+                   const framework::VariableNameMap &inputs,
+                   const framework::VariableNameMap &outputs,
+                   const framework::AttributeMap &attrs)
+      : OperatorBase(type, inputs, outputs, attrs) {}
+  void Run(const framework::Scope &scope,
+           const platform::DeviceContext &dev_ctx) const override {
+    auto &x = scope.FindVar(Input("X"))->Get<framework::LoDTensorArray>();
+    auto &out =
+        *scope.FindVar(Output("Out"))->GetMutable<framework::LoDTensor>();
+    out.Resize({1});
+    auto cpu = platform::CPUPlace();
+    *out.mutable_data<int64_t>(cpu) = static_cast<int64_t>(x.size());
+  }
+};
+
+class LoDArrayLengthProtoMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  LoDArrayLengthProtoMaker(framework::OpProto *proto,
+                           framework::OpAttrChecker *op_checker)
+      : OpProtoAndCheckerMaker(proto, op_checker) {
+    AddInput("X", "(LoDTensorArray) The input tensor array.");
+    AddOutput("Out", "(Tensor) 1x1 CPU Tensor of length, int64_t");
+    AddComment(R"DOC(Get the length of lod tensor array
+
+Out = len(X)
+
+NOTE: The output is a CPU Tensor since the control variable should be only in
+CPU and the length of LoDTensorArray should be used as control variables.
+)DOC");
+  }
+};
+
+class LoDArrayLengthInferShape : public framework::InferShapeBase {
+ public:
+  void operator()(framework::InferShapeContext *context) const override {
+    PADDLE_ENFORCE(context->HasInput("X"));
+    PADDLE_ENFORCE(context->HasOutput("Out"));
+    context->SetOutputDim("Out", {1});
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+REGISTER_OPERATOR(lod_array_length, ops::LoDArrayLengthOp,
+                  ops::LoDArrayLengthInferShape, ops::LoDArrayLengthProtoMaker,
+                  paddle::framework::EmptyGradOpMaker);

paddle/operators/lod_rank_table_op.cc

@@ -66,7 +66,8 @@ class LoDRankTableInferVarType : public framework::VarTypeInference {
   void operator()(const framework::OpDescBind &op_desc,
                   framework::BlockDescBind *block) const override {
     for (auto &o : op_desc.Output("Out")) {
-      block->Var(o)->SetType(framework::VarDesc::LOD_RANK_TABLE);
+      block->FindRecursiveOrCreateVar(o)->SetType(
+          framework::VarDesc::LOD_RANK_TABLE);
     }
   }
 };

paddle/operators/lod_tensor_to_array_op.cc

@@ -133,6 +133,22 @@ class LoDTensorToArrayInferVarType : public framework::VarTypeInference {
   }
 };
 
+class LoDTensorToArrayGradMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+ protected:
+  std::unique_ptr<framework::OpDescBind> Apply() const override {
+    auto *grad_op = new framework::OpDescBind();
+    grad_op->SetType("array_to_lod_tensor");
+    grad_op->SetInput("X", OutputGrad("Out"));
+    grad_op->SetInput("RankTable", Input("RankTable"));
+    grad_op->SetOutput("Out", InputGrad("X"));
+    grad_op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDescBind>(grad_op);
+  }
+};
+
 }  // namespace operators
 }  // namespace paddle
 
@@ -140,4 +156,5 @@ namespace ops = paddle::operators;
 REGISTER_OPERATOR(lod_tensor_to_array, ops::LoDTensorToArrayOp,
                   ops::LoDTensorToArrayOpProtoMaker,
                   ops::LoDTensorToArrayInferShape,
-                  ops::LoDTensorToArrayInferVarType);
+                  ops::LoDTensorToArrayInferVarType,
+                  ops::LoDTensorToArrayGradMaker);

paddle/operators/lstm_op.cc

@@ -24,6 +24,11 @@ class LSTMOp : public framework::OperatorWithKernel {
   void InferShape(framework::InferShapeContext* ctx) const override {
     PADDLE_ENFORCE(ctx->HasInput("Input"),
                    "Input(Input) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasInput("Weight"),
+                   "Input(Weight) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasInput("Bias"),
+                   "Input(Bias) of LSTM should not be null.");
+
     PADDLE_ENFORCE(ctx->HasOutput("Hidden"),
                    "Output(Hidden) of LSTM should not be null.");
     PADDLE_ENFORCE(ctx->HasOutput("Cell"),
@@ -59,11 +64,13 @@ class LSTMOp : public framework::OperatorWithKernel {
                       "The second dimension of Input(Weight) "
                       "should be 4 * %d.",
                       frame_size);
+
     auto b_dims = ctx->GetInputDim("Bias");
     PADDLE_ENFORCE_EQ(b_dims.size(), 2, "The rank of Input(Bias) should be 2.");
     PADDLE_ENFORCE_EQ(b_dims[0], 1,
                       "The first dimension of Input(Bias) should be 1.");
-    if (ctx->Attrs().Get<bool>("usePeepholes")) {
+
+    if (ctx->Attrs().Get<bool>("use_peepholes")) {
       PADDLE_ENFORCE_EQ(b_dims[1], 7 * frame_size,
                         "The second dimension of Input(Bias) should be "
                         "7 * %d if enable peepholes connection",
@@ -74,6 +81,7 @@ class LSTMOp : public framework::OperatorWithKernel {
                         "4 * %d if disable peepholes connection",
                         frame_size);
     }
+
     framework::DDim out_dims({in_dims[0], frame_size});
     ctx->SetOutputDim("Hidden", out_dims);
     ctx->SetOutputDim("Cell", out_dims);
@@ -118,14 +126,13 @@ class LSTMOpMaker : public framework::OpProtoAndCheckerMaker {
     AddInput("Bias",
              "(Tensor) the learnable weights, which contains two parts: "
              "input-hidden bias weight and peephole connections weight if "
-             "setting `usePeepholes` True. "
-             "1. `usePeepholes = False` "
+             "setting `use_peepholes` True. "
+             "1. `use_peepholes = False` "
              " - The shape is (1 x 4D). "
              " - Bias = {b_c, b_i, b_f, b_o}."
-             "2. `usePeepholes = True` "
+             "2. `use_peepholes = True` "
              " - The shape is (1 x 7D). "
-             " - Bias = {b_c, b_i, b_f, b_o, W_ic, W_fc, W_oc}.")
-        .AsDispensable();
+             " - Bias = {b_c, b_i, b_f, b_o, W_ic, W_fc, W_oc}.");
     AddOutput("Hidden",
               "(LoDTensor) the hidden state of LSTM operator. "
               "The shape is (T x D), and lod is the same with the `Input`.");
@@ -145,29 +152,32 @@ class LSTMOpMaker : public framework::OpProtoAndCheckerMaker {
               "(LoDTensor) This LoDTensor is obtained in the forward and used "
               "in the backward.")
         .AsIntermediate();
-    AddAttr<bool>("usePeepholes",
-                  "(bool, default True) "
+    AddAttr<bool>("use_peepholes",
+                  "(bool, defalut: True) "
                   "whether to enable diagonal/peephole connections.")
         .SetDefault(true);
-    AddAttr<bool>("isReverse",
-                  "(bool, default False) "
+    AddAttr<bool>("is_reverse",
+                  "(bool, defalut: False) "
                   "whether to compute reversed LSTM.")
         .SetDefault(false);
     AddAttr<std::string>(
-        "gateActivation",
-        "(string, default sigmoid)"
+        "gate_activation",
+        "(string, default: sigmoid)"
         "The activation for input gate, forget gate and output "
         "gate, `sigmoid` by default.")
-        .SetDefault("sigmoid");
-    AddAttr<std::string>("cellActivation",
-                         "(string, default tanh)"
+        .SetDefault("sigmoid")
+        .InEnum({"sigmoid", "tanh", "relu", "identity"});
+    AddAttr<std::string>("cell_activation",
+                         "(string, default: tanh)"
                          "The activation for cell output, `tanh` by defalut.")
-        .SetDefault("tanh");
-    AddAttr<std::string>("candidateActivation",
-                         "(string, default tanh)"
+        .SetDefault("tanh")
+        .InEnum({"sigmoid", "tanh", "relu", "identity"});
+    AddAttr<std::string>("candidate_activation",
+                         "(string, default: tanh)"
                          "The activation for candidate hidden state, "
                          "`tanh` by default.")
-        .SetDefault("tanh");
+        .SetDefault("tanh")
+        .InEnum({"sigmoid", "tanh", "relu", "identity"});
     AddComment(R"DOC(
 Long-Short Term Memory (LSTM) Operator.
 
@@ -203,7 +213,7 @@ are the cell input and cell output activation functions and `tanh` is usually
 used for them. \f$\tilde{c_t}\f$ is also called candidate hidden state,
 which is computed based on the current input and the previous hidden state.
 
-Set usePeepholes False to disable peephole connection 
+Set `use_peepholes` False to disable peephole connection 
 (http://www.bioinf.jku.at/publications/older/2604.pdf). The formula
 is omitted here.
 
@@ -226,23 +236,27 @@ class LSTMGradOp : public framework::OperatorWithKernel {
                    "Input(Hidden) of LSTM should not be null.");
     PADDLE_ENFORCE(ctx->HasInput("Cell"),
                    "Input(Cell) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasInput("Weight"),
+                   "Input(Weight) of LSTM should not be null.");
+    PADDLE_ENFORCE(ctx->HasInput("Bias"),
+                   "Input(Bias) of LSTM should not be null.");
 
     PADDLE_ENFORCE(ctx->HasInput("BatchGate"),
                    "Input(BatchGate) of LSTM should not be null.");
     PADDLE_ENFORCE(ctx->HasInput("BatchCellPreAct"),
                    "Input(BatchGate) of LSTM should not be null.");
 
-    auto in_g_name = framework::GradVarName("Input");
-    if (ctx->HasOutput(in_g_name))
-      ctx->SetOutputDim(in_g_name, ctx->GetInputDim("Input"));
-
-    auto w_g_name = framework::GradVarName("Weight");
-    if (ctx->HasOutput(w_g_name))
-      ctx->SetOutputDim(w_g_name, ctx->GetInputDim("Weight"));
-
-    auto b_g_name = framework::GradVarName("Bias");
-    if (ctx->HasOutput(b_g_name))
-      ctx->SetOutputDim(b_g_name, ctx->GetInputDim("Bias"));
+    auto SetOutGradDim = [&ctx](const std::string& name) {
+      auto g_name = framework::GradVarName(name);
+      if (ctx->HasOutput(g_name))
+        ctx->SetOutputDim(g_name, ctx->GetInputDim(name));
+    };
+
+    SetOutGradDim("Input");
+    SetOutGradDim("Weight");
+    SetOutGradDim("Bias");
+    SetOutGradDim("H0");
+    SetOutGradDim("C0");
   }
 
  protected:

paddle/operators/lstm_op.h

@@ -28,6 +28,15 @@ template <typename T, int MajorType = Eigen::RowMajor,
           typename IndexType = Eigen::DenseIndex>
 using EigenMatrix = framework::EigenMatrix<T, MajorType, IndexType>;
 
+template <typename Place, typename T>
+inline void ReorderInitState(const platform::DeviceContext& ctx,
+                             const framework::Tensor& src, const size_t* index,
+                             framework::Tensor* dst, bool indexed_src) {
+  math::CopyMatrixRowsFunctor<Place, T> row_shuffle;
+  dst->mutable_data<T>(src.dims(), ctx.GetPlace());
+  row_shuffle(ctx, src, index, *dst, indexed_src);
+}
+
 template <typename Place, typename T>
 class LSTMKernel : public framework::OpKernel<T> {
  public:
@@ -36,6 +45,9 @@ class LSTMKernel : public framework::OpKernel<T> {
     auto* weight = ctx.Input<Tensor>("Weight");
     auto* bias = ctx.Input<Tensor>("Bias");
 
+    auto* hidden_t0 = ctx.Input<Tensor>("H0");
+    auto* cell_t0 = ctx.Input<Tensor>("C0");
+
     auto* batch_gate = ctx.Output<LoDTensor>("BatchGate");
     batch_gate->mutable_data<T>(ctx.GetPlace());
     auto* hidden_out = ctx.Output<LoDTensor>("Hidden");
@@ -43,12 +55,7 @@ class LSTMKernel : public framework::OpKernel<T> {
     auto* cell_out = ctx.Output<LoDTensor>("Cell");
     cell_out->mutable_data<T>(ctx.GetPlace());
 
-    // Now the function ShareLoD in InferShape is not implemented.
-    // So copy LoD here.
-    ctx.ShareLoD("Input", "Hidden");
-    ctx.ShareLoD("Input", "Cell");
-
-    bool is_reverse = ctx.Attr<bool>("isReverse");
+    bool is_reverse = ctx.Attr<bool>("is_reverse");
     math::LoDTensor2BatchFunctor<Place, T> to_batch;
     auto& device_ctx = ctx.device_context();
     to_batch(device_ctx, *input, *batch_gate, true, is_reverse);
@@ -71,7 +78,7 @@ class LSTMKernel : public framework::OpKernel<T> {
     }
 
     math::LstmMetaValue<T> lstm_value;
-    if (bias) {
+    if (bias && ctx.Attr<bool>("use_peepholes")) {
       T* bias_data = const_cast<T*>(bias->data<T>());
       // the code style in LstmMetaValue will be updated later.
 
@@ -84,6 +91,16 @@ class LSTMKernel : public framework::OpKernel<T> {
       lstm_value.checkOg = nullptr;
     }
     lstm_value.prevStateValue = nullptr;
+    Tensor ordered_c0;
+    const size_t* order = batch_gate->lod()[2].data();
+    if (cell_t0) {
+      // Since the batch computing for LSTM reorders the input sequence
+      // according to their length. The initialized cell state also needs
+      // to reorder.
+      ReorderInitState<Place, T>(device_ctx, *cell_t0, order, &ordered_c0,
+                                 true);
+      lstm_value.prevStateValue = ordered_c0.data<T>();
+    }
 
     // Use the local variable as here.
     LoDTensor batch_hidden, batch_cell;
@@ -94,9 +111,9 @@ class LSTMKernel : public framework::OpKernel<T> {
 
     auto batch_starts = batch_gate->lod()[0];
     size_t num_batch = batch_starts.size() - 1;
-    auto gate_act = ctx.Attr<std::string>("gateActivation");
-    auto cell_act = ctx.Attr<std::string>("cellActivation");
-    auto cand_act = ctx.Attr<std::string>("candidateActivation");
+    auto gate_act = ctx.Attr<std::string>("gate_activation");
+    auto cell_act = ctx.Attr<std::string>("cell_activation");
+    auto cand_act = ctx.Attr<std::string>("candidate_activation");
 
     for (size_t n = 0; n < num_batch; n++) {
       int bstart = static_cast<int>(batch_starts[n]);
@@ -109,15 +126,28 @@ class LSTMKernel : public framework::OpKernel<T> {
 
       int cur_batch_size = bend - bstart;
 
-      if (n != 0) {
+      if (n > 0) {
         int pre_h_start = static_cast<int>(batch_starts[n - 1]);
         int pre_h_end = pre_h_start + cur_batch_size;
         auto pre_hidden_t = batch_hidden.Slice(pre_h_start, pre_h_end);
         math::matmul<Place, T>(device_ctx, pre_hidden_t, false, *weight, false,
                                static_cast<T>(1.0), &gate_t,
                                static_cast<T>(1.0));
+      } else if (hidden_t0) {
+        // If n == 0 and there is no initialized hidden state, that is to say
+        // the H0 is zeros, the calculation W_h * H0 will be skiped.
+        // If n == 0 and there is initialized hidden state, calculate W_h * H0.
+
+        // Since the batch computing for LSTM reorders the input sequence
+        // according to their length. The initialized hidden state also needs
+        // to reorder.
+        Tensor ordered_h0;
+        ReorderInitState<Place, T>(device_ctx, *hidden_t0, order, &ordered_h0,
+                                   true);
+        math::matmul<Place, T>(device_ctx, ordered_h0, false, *weight, false,
+                               static_cast<T>(1.0), &gate_t,
+                               static_cast<T>(1.0));
       }
-      // else if : FIXME support the initial hidden and cell
 
       lstm_value.gateValue = gate_t.data<T>();
       lstm_value.outputValue = out_t.data<T>();
@@ -160,6 +190,12 @@ class LSTMGradKernel : public framework::OpKernel<T> {
     auto* weight_g = ctx.Output<Tensor>(framework::GradVarName("Weight"));
     auto* bias_g = ctx.Output<Tensor>(framework::GradVarName("Bias"));
 
+    auto* h0 = ctx.Input<Tensor>("H0");
+    auto* c0 = ctx.Input<Tensor>("C0");
+
+    auto* h0_g = ctx.Output<Tensor>(framework::GradVarName("H0"));
+    auto* c0_g = ctx.Output<Tensor>(framework::GradVarName("C0"));
+
     auto& device_ctx = ctx.device_context();
     math::SetConstant<Place, T> zero;
     if (weight_g) {
@@ -167,13 +203,25 @@ class LSTMGradKernel : public framework::OpKernel<T> {
       zero(device_ctx, weight_g, static_cast<T>(0.0));
     }
 
+    // ordered_h0/c0 is the reordered hidden/cell initialization.
+    // ordered_h0_g/c0_g is the reordered gradient of hidden/cell
+    // initialization.
+    Tensor ordered_h0, ordered_c0, ordered_h0_g, ordered_c0_g;
+    const size_t* order = batch_gate->lod()[2].data();
+    if (c0) {
+      ReorderInitState<Place, T>(device_ctx, *c0, order, &ordered_c0, true);
+    }
+    if (c0 && c0_g) {
+      ordered_c0_g.mutable_data<T>(c0_g->dims(), ctx.GetPlace());
+    }
+
     auto in_dims = input->dims();
     auto out_dims = hidden_g->dims();
     int frame_size = static_cast<int>(in_dims[1] / 4);
     PADDLE_ENFORCE_EQ(frame_size, out_dims[1]);
 
     math::LstmMetaValue<T> lstm_value;
-    if (bias) {
+    if (bias && ctx.Attr<bool>("use_peepholes")) {
       T* bias_data = const_cast<T*>(bias->data<T>());
       lstm_value.checkIg = bias_data + 4 * frame_size;
       lstm_value.checkFg = lstm_value.checkIg + frame_size;
@@ -185,9 +233,13 @@ class LSTMGradKernel : public framework::OpKernel<T> {
     }
 
     math::LstmMetaGrad<T> lstm_grad;
+
     if (bias && bias_g) {
-      T* bias_g_data = const_cast<T*>(bias_g->mutable_data<T>(ctx.GetPlace()));
+      bias_g->mutable_data<T>(ctx.GetPlace());
       zero(device_ctx, bias_g, static_cast<T>(0.0));
+    }
+    if (bias && bias_g && ctx.Attr<bool>("use_peepholes")) {
+      T* bias_g_data = bias_g->data<T>();
       lstm_grad.checkIgGrad = bias_g_data + 4 * frame_size;
       lstm_grad.checkFgGrad = lstm_grad.checkIgGrad + frame_size;
       lstm_grad.checkOgGrad = lstm_grad.checkFgGrad + frame_size;
@@ -199,36 +251,30 @@ class LSTMGradKernel : public framework::OpKernel<T> {
 
     math::LoDTensor2BatchFunctor<Place, T> to_batch;
 
-    // use the local variable as here.
-    LoDTensor batch_hidden;
-    batch_hidden.mutable_data<T>(out_dims, ctx.GetPlace());
-    batch_hidden.set_lod(batch_gate->lod());
-    to_batch(device_ctx, *hidden_out, batch_hidden, false);
-
-    LoDTensor batch_hidden_g;
-    batch_hidden_g.mutable_data<T>(out_dims, ctx.GetPlace());
-    batch_hidden_g.set_lod(batch_gate->lod());
-    to_batch(device_ctx, *hidden_g, batch_hidden_g, false);
+    auto ToBatch = [&batch_gate, &to_batch](
+        const platform::DeviceContext& ctx, const framework::LoDTensor& src,
+        const framework::DDim& dims, framework::LoDTensor& dst) {
+      dst.mutable_data<T>(dims, ctx.GetPlace());
+      dst.set_lod(batch_gate->lod());
+      to_batch(ctx, src, dst, false);
+    };
 
-    LoDTensor batch_cell;
-    batch_cell.mutable_data<T>(out_dims, ctx.GetPlace());
-    batch_cell.set_lod(batch_gate->lod());
-    to_batch(device_ctx, *cell_out, batch_cell, false);
+    LoDTensor batch_hidden, batch_hidden_g, batch_cell;
+    ToBatch(device_ctx, *hidden_out, out_dims, batch_hidden);
+    ToBatch(device_ctx, *hidden_g, out_dims, batch_hidden_g);
+    ToBatch(device_ctx, *cell_out, out_dims, batch_cell);
 
-    LoDTensor batch_cell_g;
+    LoDTensor batch_cell_g, batch_gate_g;
     batch_cell_g.mutable_data<T>(out_dims, ctx.GetPlace());
-    batch_cell_g.set_lod(batch_gate->lod());
     // TODO(qingqing) support the case output cell has gradient.
     // to_batch(device_ctx, *cell_g, batch_cell_g, false);
     zero(device_ctx, &batch_cell_g, static_cast<T>(0.0));
-
-    LoDTensor batch_gate_g;
     batch_gate_g.mutable_data<T>(batch_gate->dims(), ctx.GetPlace());
     batch_gate_g.set_lod(batch_gate->lod());
 
-    auto gate_act = ctx.Attr<std::string>("gateActivation");
-    auto cell_act = ctx.Attr<std::string>("cellActivation");
-    auto cand_act = ctx.Attr<std::string>("candidateActivation");
+    auto gate_act = ctx.Attr<std::string>("gate_activation");
+    auto cell_act = ctx.Attr<std::string>("cell_activation");
+    auto cand_act = ctx.Attr<std::string>("candidate_activation");
 
     auto batch_starts = batch_gate->lod()[0];
     size_t num_batch = batch_starts.size() - 1;
@@ -250,15 +296,15 @@ class LSTMGradKernel : public framework::OpKernel<T> {
       lstm_grad.gateGrad = gate_g.data<T>();
       lstm_grad.outputGrad = out_g.data<T>();
 
-      if (n) {
+      if (n > 0) {
         int bstart_pre = static_cast<int>(batch_starts[n - 1]);
         Tensor cell_pre = batch_cell.Slice(bstart_pre, bstart);
         Tensor cell_pre_g = batch_cell_g.Slice(bstart_pre, bstart);
         lstm_value.prevStateValue = cell_pre.data<T>();
         lstm_grad.prevStateGrad = cell_pre_g.data<T>();
       } else {
-        lstm_value.prevStateValue = nullptr;
-        lstm_grad.prevStateGrad = nullptr;
+        lstm_value.prevStateValue = c0 ? ordered_c0.data<T>() : nullptr;
+        lstm_grad.prevStateGrad = c0_g ? ordered_c0_g.data<T>() : nullptr;
       }
 
       int cur_batch_size = bend - bstart;
@@ -266,7 +312,7 @@ class LSTMGradKernel : public framework::OpKernel<T> {
           device_ctx, lstm_value, lstm_grad, frame_size, cur_batch_size,
           gate_act, cell_act, cand_act);
 
-      if (n != 0) {
+      if (n > 0) {
         int pre_h_start = static_cast<int>(batch_starts[n - 1]);
         int pre_h_end = pre_h_start + cur_batch_size;
         auto pre_hidden_g = batch_hidden_g.Slice(pre_h_start, pre_h_end);
@@ -280,6 +326,19 @@ class LSTMGradKernel : public framework::OpKernel<T> {
                                  static_cast<T>(1.0), weight_g,
                                  static_cast<T>(1.0));
         }
+      } else {
+        if (h0 && weight_g) {
+          ReorderInitState<Place, T>(device_ctx, *h0, order, &ordered_h0, true);
+          math::matmul<Place, T>(device_ctx, ordered_h0, true, gate_g, false,
+                                 static_cast<T>(1.0), weight_g,
+                                 static_cast<T>(1.0));
+        }
+        if (h0 && h0_g) {
+          ordered_h0_g.mutable_data<T>(h0_g->dims(), ctx.GetPlace());
+          math::matmul<Place, T>(device_ctx, gate_g, false, *weight, true,
+                                 static_cast<T>(1.0), &ordered_h0_g,
+                                 static_cast<T>(0.0));
+        }
       }
     }
 
@@ -302,6 +361,13 @@ class LSTMGradKernel : public framework::OpKernel<T> {
       math::gemv<Place, T>(device_ctx, true, m, n, 1., batch_gate_g.data<T>(),
                            ones.data<T>(), 0., bias_g->data<T>());
     }
+
+    if (h0 && h0_g) {
+      ReorderInitState<Place, T>(device_ctx, ordered_h0_g, order, h0_g, false);
+    }
+    if (c0 && c0_g) {
+      ReorderInitState<Place, T>(device_ctx, ordered_c0_g, order, c0_g, false);
+    }
   }
 };
 

paddle/operators/lstm_unit_op.cc

@@ -34,9 +34,9 @@ class LstmUnitOp : public framework::OperatorWithKernel {
     auto c_prev_dims = ctx->GetInputDim("C_prev");
 
     PADDLE_ENFORCE_EQ(x_dims.size(), 2, "Input(X)'s rank must be 2.");
-    PADDLE_ENFORCE(x_dims[0] == c_prev_dims[0],
+    PADDLE_ENFORCE_EQ(x_dims[0], c_prev_dims[0],
                       "Batch size of inputs and states must be equal");
-    PADDLE_ENFORCE(x_dims[1] == c_prev_dims[1] * 4,
+    PADDLE_ENFORCE_EQ(x_dims[1], c_prev_dims[1] * 4,
                       "Dimension of FC should equal to prev state * 4");
 
     int b_size = c_prev_dims[0];  // batch size

paddle/operators/math/CMakeLists.txt

@@ -13,7 +13,7 @@ if(WITH_GPU)
     nv_library(context_project SRCS context_project.cc context_project.cu DEPS device_context)
     nv_library(sequence2batch SRCS sequence2batch.cc sequence2batch.cu DEPS device_context)
     nv_library(lstm_compute SRCS lstm_compute.cc lstm_compute.cu DEPS device_context activation_functions)
-    nv_library(gru_compute SRCS gru_compute.cc gru_compute.cu DEPS device_context activation_functions)
+    nv_library(gru_compute SRCS gru_compute.cc gru_compute.cu DEPS device_context activation_functions math_function)
 else()
     cc_library(math_function SRCS math_function.cc im2col.cc DEPS cblas device_context operator)
     cc_library(selected_rows_functor SRCS selected_rows_functor.cc DEPS selected_rows math_function)

paddle/operators/math/detail/lstm_cpu_kernel.h

@@ -52,9 +52,9 @@ void naive_lstm_forward_one_sequence(Op op, LstmMetaValue<T> value,
     rValueIg = valueIg[i];
     rValueFg = valueFg[i];
     rValueOg = valueOg[i];
-    rCheckI = value.checkIg[i];
-    rCheckF = value.checkFg[i];
-    rCheckO = value.checkOg[i];
+    rCheckI = value.checkIg ? value.checkIg[i] : 0;
+    rCheckF = value.checkFg ? value.checkFg[i] : 0;
+    rCheckO = value.checkOg ? value.checkOg[i] : 0;
 
     if (value.prevStateValue) {
       rPrevState = value.prevStateValue[i];
@@ -114,9 +114,9 @@ void naive_lstm_backward_one_sequence(Op op, LstmMetaValue<T> value,
     rValueIg = valueIg[i];
     rValueFg = valueFg[i];
     rValueOg = valueOg[i];
-    rCheckI = value.checkIg[i];
-    rCheckF = value.checkFg[i];
-    rCheckO = value.checkOg[i];
+    rCheckI = value.checkIg ? value.checkIg[i] : 0;
+    rCheckF = value.checkFg ? value.checkFg[i] : 0;
+    rCheckO = value.checkOg ? value.checkOg[i] : 0;
     rState = value.stateValue[i];
     rStateAtv = value.stateActiveValue[i];
     rOutputGrad = grad.outputGrad[i];
@@ -155,9 +155,9 @@ void avx_lstm_forward_one_sequence(Op op, LstmMetaValue<T> value, int frameSize,
   __m256 rValueIg;
   __m256 rValueFg;
   __m256 rValueOg;
-  __m256 rCheckI;
-  __m256 rCheckF;
-  __m256 rCheckO;
+  __m256 rCheckI = _mm256_set1_ps(0.0f);
+  __m256 rCheckF = _mm256_set1_ps(0.0f);
+  __m256 rCheckO = _mm256_set1_ps(0.0f);
   __m256 rState;
   __m256 rPrevState = _mm256_set1_ps(0.0f);
   __m256 rStateAtv;
@@ -173,9 +173,11 @@ void avx_lstm_forward_one_sequence(Op op, LstmMetaValue<T> value, int frameSize,
     rValueIg = valueIg[i];
     rValueFg = valueFg[i];
     rValueOg = valueOg[i];
+    if (value.checkIg) {
       rCheckI = ((__m256 *)value.checkIg)[i];
       rCheckF = ((__m256 *)value.checkFg)[i];
       rCheckO = ((__m256 *)value.checkOg)[i];
+    }
 
     if (value.prevStateValue) {
       rPrevState = ((__m256 *)value.prevStateValue)[i];
@@ -216,9 +218,9 @@ void avx_lstm_backward_one_sequence(Op op, LstmMetaValue<T> value,
   __m256 rState;
   __m256 rStateAtv;
   __m256 rOutputGrad;
-  __m256 rCheckI;
-  __m256 rCheckF;
-  __m256 rCheckO;
+  __m256 rCheckI = _mm256_set1_ps(0.0f);
+  __m256 rCheckF = _mm256_set1_ps(0.0f);
+  __m256 rCheckO = _mm256_set1_ps(0.0f);
   __m256 rCheckIGrad;
   __m256 rCheckFGrad;
   __m256 rCheckOGrad;
@@ -237,9 +239,11 @@ void avx_lstm_backward_one_sequence(Op op, LstmMetaValue<T> value,
     rValueIg = valueIg[i];
     rValueFg = valueFg[i];
     rValueOg = valueOg[i];
+    if (value.checkIg) {
       rCheckI = ((__m256 *)value.checkIg)[i];
       rCheckF = ((__m256 *)value.checkFg)[i];
       rCheckO = ((__m256 *)value.checkOg)[i];
+    }
     rState = ((__m256 *)value.stateValue)[i];
     rStateAtv = ((__m256 *)value.stateActiveValue)[i];
     rOutputGrad = ((__m256 *)grad.outputGrad)[i];

paddle/operators/math/detail/lstm_gpu_kernel.h

@@ -55,9 +55,10 @@ __global__ void KeLstmForward(Op op, LstmMetaValue<T> value, int frameSize,
   T rValueIg;
   T rValueFg;
   T rValueOg;
-  T rCheckI = value.checkIg[frameIdx];
-  T rCheckF = value.checkFg[frameIdx];
-  T rCheckO = value.checkOg[frameIdx];
+
+  T rCheckI = value.checkIg ? value.checkIg[frameIdx] : 0;
+  T rCheckF = value.checkFg ? value.checkFg[frameIdx] : 0;
+  T rCheckO = value.checkOg ? value.checkOg[frameIdx] : 0;
 
   rValueIn = value.gateValue[frameIdx];
   rValueIg = value.gateValue[frameIdx + frameSize];
@@ -121,9 +122,10 @@ __global__ void KeLstmBackward(Op op, LstmMetaValue<T> value,
   T rStateGrad;
   T rStateAtv;
   T rOutputGrad;
-  T rCheckI = value.checkIg[frameIdx];
-  T rCheckF = value.checkFg[frameIdx];
-  T rCheckO = value.checkOg[frameIdx];
+  T rCheckI = value.checkIg ? value.checkIg[frameIdx] : 0;
+  T rCheckF = value.checkFg ? value.checkFg[frameIdx] : 0;
+  T rCheckO = value.checkOg ? value.checkOg[frameIdx] : 0;
+
   T rCheckIGrad;
   T rCheckFGrad;
   T rCheckOGrad;

paddle/operators/math/math_function.cc

@@ -234,8 +234,8 @@ void gemv<platform::CPUPlace, double>(const platform::DeviceContext& context,
 
 template struct SetConstant<platform::CPUPlace, float>;
 
-struct TensorSetConstant {
-  TensorSetConstant(framework::Tensor* tensor, float value)
+struct TensorSetConstantCPU {
+  TensorSetConstantCPU(framework::Tensor* tensor, float value)
       : tensor_(tensor), value_(value) {}
   template <typename T>
   void operator()() const {
@@ -252,7 +252,7 @@ void set_constant_with_place<platform::CPUPlace>(
     const platform::DeviceContext& context, framework::Tensor* tensor,
     float value) {
   framework::VisitDataType(framework::ToDataType(tensor->type()),
-                           TensorSetConstant(tensor, value));
+                           TensorSetConstantCPU(tensor, value));
 }
 
 struct TensorSetConstantWithPlace : public boost::static_visitor<void> {

paddle/operators/math/math_function.cu

@@ -233,8 +233,8 @@ void gemv<platform::GPUPlace, double>(const platform::DeviceContext& context,
 
 template struct SetConstant<platform::GPUPlace, float>;
 
-struct TensorSetConstant {
-  TensorSetConstant(const platform::DeviceContext& context,
+struct TensorSetConstantGPU {
+  TensorSetConstantGPU(const platform::DeviceContext& context,
                     framework::Tensor* tensor, float value)
       : context_(context), tensor_(tensor), value_(value) {}
 
@@ -254,7 +254,7 @@ void set_constant_with_place<platform::GPUPlace>(
     const platform::DeviceContext& context, framework::Tensor* tensor,
     float value) {
   framework::VisitDataType(framework::ToDataType(tensor->type()),
-                           TensorSetConstant(context, tensor, value));
+                           TensorSetConstantGPU(context, tensor, value));
 }
 
 }  // namespace math

paddle/operators/math/math_function.h

@@ -19,11 +19,6 @@ limitations under the License. */
 #include <mkl_vml_functions.h>
 #endif
 
-#ifdef PADDLE_USE_MKL
-#include <mkl.h>
-#include <mkl_lapacke.h>
-#endif
-
 #ifdef PADDLE_USE_ATLAS
 extern "C" {
 #include <cblas.h>

paddle/operators/math/sequence2batch.cc

@@ -22,8 +22,8 @@ template <typename T>
 class CopyMatrixRowsFunctor<platform::CPUPlace, T> {
  public:
   void operator()(const platform::DeviceContext& context,
-                  const framework::LoDTensor& src, const size_t* index,
-                  framework::LoDTensor& dst, bool is_src_index) {
+                  const framework::Tensor& src, const size_t* index,
+                  framework::Tensor& dst, bool is_src_index) {
     auto src_dims = src.dims();
     auto dst_dims = dst.dims();
     PADDLE_ENFORCE_EQ(src_dims.size(), 2UL,

paddle/operators/math/sequence2batch.cu

@@ -41,8 +41,8 @@ template <typename T>
 class CopyMatrixRowsFunctor<platform::GPUPlace, T> {
  public:
   void operator()(const platform::DeviceContext& context,
-                  const framework::LoDTensor& src, const size_t* index,
-                  framework::LoDTensor& dst, bool is_src_index) {
+                  const framework::Tensor& src, const size_t* index,
+                  framework::Tensor& dst, bool is_src_index) {
     auto src_dims = src.dims();
     auto dst_dims = dst.dims();
     PADDLE_ENFORCE_EQ(src_dims.size(), 2,

paddle/operators/math/sequence2batch.h

@@ -30,8 +30,8 @@ class CopyMatrixRowsFunctor {
   // copy the input src to the indexed rows of output dst.
   // The indexed rows are based on the input index.
   void operator()(const platform::DeviceContext& context,
-                  const framework::LoDTensor& src, const size_t* index,
-                  framework::LoDTensor& dst, bool is_src_index);
+                  const framework::Tensor& src, const size_t* index,
+                  framework::Tensor& dst, bool is_src_index);
 };
 
 template <typename Place, typename T>
@@ -57,7 +57,7 @@ class LoDTensor2BatchFunctor {
                   bool is_reverse = false) const {
     if (!is_cal_batch_lod) {
       auto lods = batch.lod();
-      PADDLE_ENFORCE_EQ(lods.size(), 2UL);
+      PADDLE_ENFORCE_GT(lods.size(), 2UL);
       PADDLE_ENFORCE_EQ(lods[1].size(),
                         static_cast<size_t>(lod_tensor.dims()[0]));
       CopyMatrixRowsFunctor<Place, T> to_batch;
@@ -66,8 +66,8 @@ class LoDTensor2BatchFunctor {
     }
 
     auto lods = lod_tensor.lod();
-    PADDLE_ENFORCE_EQ(lods.size(), 1UL, "Only support one level sequence now.");
     auto lod = lods[0];
+    PADDLE_ENFORCE_EQ(lods.size(), 1UL, "Only support one level sequence now.");
 
     std::vector<SeqInfo> seq_info;
     for (size_t seq_id = 0; seq_id < lod.size() - 1; ++seq_id) {
@@ -78,8 +78,7 @@ class LoDTensor2BatchFunctor {
     std::sort(seq_info.begin(), seq_info.end(),
               [](SeqInfo a, SeqInfo b) { return a.length > b.length; });
 
-    // calculate the start position of each batch
-    // (numBatch equal the maxLength of sequences)
+    // Calculate the start position of each batch.
     // example:  sequences = {s0, s1, s2}
     //           s0: 0 0 0 0, s1: 1 1 1 1 1, s2: 2 2 2
     //           num_batch = 5,
@@ -95,19 +94,25 @@ class LoDTensor2BatchFunctor {
     //                                6, 2, 11,
     //                                7, 3,
     //                                8}
-    // The batch number represents batch size after rearranging the
+    //           seq_order = {1, 0, 2}, the sort order.
+    //               where 1 is the second sequence,
+    //                     0 is the first sequence,
+    //                     2 is the third sequence.
+    // The num_batch represents batch size after rearranging the
     // input LodTensor. It is also the maximum length of input sequence.
 
     paddle::framework::LoD batch_lods;
     batch_lods.emplace_back(std::vector<size_t>{0});
     batch_lods.emplace_back(std::vector<size_t>{0});
+    batch_lods.emplace_back(std::vector<size_t>{0});
 
     // batch_lods[0] is the start positions for batch LoDTensor
     int num_batch = seq_info[0].length;
     batch_lods[0].resize(static_cast<size_t>(num_batch + 1));
     // batch_lods[1] is the raw index in the input LoDTensor
-    auto dims = lod_tensor.dims();
-    batch_lods[1].resize(static_cast<size_t>(dims[0]));
+    batch_lods[1].resize(static_cast<size_t>(lod_tensor.dims()[0]));
+    // batch_lods[2] is the sort order for the input LoDTensor.
+    batch_lods[2].resize(seq_info.size());
 
     size_t* batch_starts = batch_lods[0].data();
     size_t* seq2batch_idx = batch_lods[1].data();
@@ -127,6 +132,10 @@ class LoDTensor2BatchFunctor {
       }
       batch_starts[n + 1] = static_cast<size_t>(batch_id);
     }
+    size_t* seq_order = batch_lods[2].data();
+    for (size_t i = 0; i < seq_info.size(); ++i) {
+      seq_order[i] = seq_info[i].seq_idx;
+    }
     batch.set_lod(batch_lods);
 
     CopyMatrixRowsFunctor<Place, T> to_batch;
@@ -141,8 +150,7 @@ class Batch2LoDTensorFunctor {
                   const framework::LoDTensor& batch,
                   framework::LoDTensor& lod_tensor) const {
     auto in_lod = batch.lod();
-    PADDLE_ENFORCE_EQ(in_lod.size(), 2UL,
-                      "The LoD size of input `batch` should be 2.");
+    PADDLE_ENFORCE_GT(in_lod.size(), 2UL);
     PADDLE_ENFORCE_EQ(in_lod[1].size(),
                       static_cast<size_t>(lod_tensor.dims()[0]));
     CopyMatrixRowsFunctor<Place, T> to_seq;

paddle/operators/mean_op.cc

@@ -51,6 +51,7 @@ class MeanGradOp : public framework::OperatorWithKernel {
 
   void InferShape(framework::InferShapeContext* ctx) const override {
     ctx->SetOutputDim(framework::GradVarName("X"), ctx->GetInputDim("X"));
+    ctx->ShareLoD("X", framework::GradVarName("X"));
   }
 };
 

paddle/operators/momentum_op.cc

@@ -75,7 +75,7 @@ class MomentumOpMaker : public framework::OpProtoAndCheckerMaker {
     AddOutput("VelocityOut", "(Tensor) Output updated velocity");
 
     AddAttr<float>("mu", "(float) Momentum coefficient");
-    AddAttr<bool>("useNesterov",
+    AddAttr<bool>("use_nesterov",
                   "(bool, default false) "
                   "Use Nesterov Momentum")
         .SetDefault(false);

paddle/operators/momentum_op.h

@@ -34,7 +34,7 @@ class MomentumOpKernel : public framework::OpKernel<T> {
     velocity_out->mutable_data<T>(ctx.GetPlace());
 
     float mu = ctx.Attr<float>("mu");
-    bool use_nesterov = ctx.Attr<bool>("useNesterov");
+    bool use_nesterov = ctx.Attr<bool>("use_nesterov");
 
     auto p_out = framework::EigenVector<T>::Flatten(*param_out);
     auto v_out = framework::EigenVector<T>::Flatten(*velocity_out);

paddle/operators/mul_op.cu

@@ -12,7 +12,6 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#define EIGEN_USE_GPU
 #include "paddle/operators/mul_op.h"
 
 namespace ops = paddle::operators;

paddle/operators/mul_op.h

@@ -16,16 +16,12 @@
 
 #include "paddle/operators/math/math_function.h"
 
-#include "paddle/framework/eigen.h"
 #include "paddle/framework/op_registry.h"
 
 namespace paddle {
 namespace operators {
 
 using Tensor = framework::Tensor;
-template <typename T, int MajorType = Eigen::RowMajor,
-          typename IndexType = Eigen::DenseIndex>
-using EigenMatrix = framework::EigenMatrix<T, MajorType, IndexType>;
 
 template <typename Place, typename T>
 class MulKernel : public framework::OpKernel<T> {

paddle/operators/nccl/nccl_gpu_common.h

@@ -35,6 +35,7 @@ constexpr int kInvalidGPUId = -1;
 struct Communicator {
   std::vector<ncclComm_t> comms_;
   std::unordered_map<int, int> comm_id_map_;
+  bool inited_;
 
   Communicator() {}
 
@@ -42,19 +43,23 @@ struct Communicator {
 
   void InitAll(const std::vector<int>& gpus) {
     comms_.resize(gpus.size());
+    inited_ = false;
     for (size_t i = 0; i < gpus.size(); ++i) {
       comm_id_map_[gpus[i]] = i;
     }
     PADDLE_ENFORCE(
         dynload::ncclCommInitAll(comms_.data(), gpus.size(), gpus.data()));
+    inited_ = true;
   }
 
   ~Communicator() {
+    if (inited_) {
       for (size_t i = 0; i < comms_.size(); ++i) {
         // FIXME(dzh) : PADDLE_ENFORCE return void
         dynload::ncclCommDestroy(comms_[i]);
       }
     }
+  }
 
   DISABLE_COPY_AND_ASSIGN(Communicator);
 };

paddle/operators/nccl_op_test.cu

@@ -26,7 +26,6 @@
 #include "paddle/framework/op_registry.h"
 #include "paddle/framework/program_desc.h"
 #include "paddle/framework/var_desc.h"
-#include "paddle/operators/math/math_function.h"
 #include "paddle/operators/nccl/nccl_gpu_common.h"
 #include "paddle/platform/device_context.h"
 #include "paddle/platform/enforce.h"

paddle/operators/pool_cudnn_op.cu

@@ -37,11 +37,11 @@ class PoolCudnnOpKernel : public framework::OpKernel<T> {
     const T *input_data = input->data<T>();
     T *output_data = output->mutable_data<T>(ctx.GetPlace());
 
-    std::string pooling_type = ctx.Attr<std::string>("poolingType");
+    std::string pooling_type = ctx.Attr<std::string>("pooling_type");
     std::vector<int> ksize = ctx.Attr<std::vector<int>>("ksize");
     std::vector<int> strides = ctx.Attr<std::vector<int>>("strides");
     std::vector<int> paddings = ctx.Attr<std::vector<int>>("paddings");
-    if (ctx.Attr<bool>("globalPooling")) {
+    if (ctx.Attr<bool>("global_pooling")) {
       for (size_t i = 0; i < ksize.size(); ++i) {
         paddings[i] = 0;
         ksize[i] = static_cast<int>(input->dims()[i + 2]);
@@ -92,12 +92,12 @@ class PoolCudnnGradOpKernel : public framework::OpKernel<T> {
         ctx.Input<Tensor>(framework::GradVarName("Out"));
     Tensor *input_grad = ctx.Output<Tensor>(framework::GradVarName("X"));
 
-    std::string pooling_type = ctx.Attr<std::string>("poolingType");
+    std::string pooling_type = ctx.Attr<std::string>("pooling_type");
     std::vector<int> ksize = ctx.Attr<std::vector<int>>("ksize");
     std::vector<int> strides = ctx.Attr<std::vector<int>>("strides");
     std::vector<int> paddings = ctx.Attr<std::vector<int>>("paddings");
 
-    if (ctx.Attr<bool>("globalPooling")) {
+    if (ctx.Attr<bool>("global_pooling")) {
       for (size_t i = 0; i < ksize.size(); ++i) {
         paddings[i] = 0;
         ksize[i] = static_cast<int>(input->dims()[i + 2]);

paddle/operators/pool_op.cc

@@ -29,7 +29,7 @@ void PoolOp::InferShape(framework::InferShapeContext *ctx) const {
 
   auto in_x_dims = ctx->GetInputDim("X");
 
-  std::string pooling_type = ctx->Attrs().Get<std::string>("poolingType");
+  std::string pooling_type = ctx->Attrs().Get<std::string>("pooling_type");
   std::vector<int> ksize = ctx->Attrs().Get<std::vector<int>>("ksize");
   std::vector<int> strides = ctx->Attrs().Get<std::vector<int>>("strides");
   std::vector<int> paddings = ctx->Attrs().Get<std::vector<int>>("paddings");
@@ -37,7 +37,7 @@ void PoolOp::InferShape(framework::InferShapeContext *ctx) const {
   PADDLE_ENFORCE(in_x_dims.size() == 4 || in_x_dims.size() == 5,
                  "Pooling intput should be 4-D or 5-D tensor.");
 
-  if (ctx->Attrs().Get<bool>("globalPooling")) {
+  if (ctx->Attrs().Get<bool>("global_pooling")) {
     ksize.resize(static_cast<size_t>(in_x_dims.size()) - 2);
     for (size_t i = 0; i < ksize.size(); ++i) {
       paddings[i] = 0;
@@ -83,20 +83,20 @@ Pool2dOpMaker::Pool2dOpMaker(framework::OpProto *proto,
             "H is the height of the feature, "
             "and W is the width of the feature.");
 
-  AddAttr<std::string>("poolingType",
+  AddAttr<std::string>("pooling_type",
                        "(string), pooling type, can be \"max\" for max-pooling "
                        "and \"avg\" for average-pooling.")
       .InEnum({"max", "avg"});
   AddAttr<std::vector<int>>("ksize",
                             "(vector<int>) The pooling window "
                             "size(height, width) of the pooling operator. "
-                            "If globalPooling = true, ksize and paddings will "
+                            "If global_pooling = true, ksize and paddings will "
                             "be ignored.");  // TODO(Chengduo): Add checker.
                                              // (Currently,
   // TypedAttrChecker don't support vector type.)
-  AddAttr<bool>("globalPooling",
+  AddAttr<bool>("global_pooling",
                 "(bool, default false) Whether to use the global pooling. "
-                "If globalPooling = true, ksize and paddings will be ignored.")
+                "If global_pooling = true, ksize and paddings will be ignored.")
       .SetDefault(false);
   AddAttr<std::vector<int>>("strides",
                             "(vector<int>, default {1, 1}), strides(height, "
@@ -107,7 +107,7 @@ Pool2dOpMaker::Pool2dOpMaker(framework::OpProto *proto,
       "paddings",
       "(vector<int>, defalut {0,0}), paddings(height, width) of pooling "
       "operator."
-      "If globalPooling = true, paddings and ksize will be ignored.")
+      "If global_pooling = true, paddings and ksize will be ignored.")
       .SetDefault({0, 0});  // TODO(Chengduo): Add checker. (Currently,
   // TypedAttrChecker don't support vector type.)
 
@@ -115,7 +115,7 @@ Pool2dOpMaker::Pool2dOpMaker(framework::OpProto *proto,
 Pool2d Operator.
 
 The pooling2d operation calculates the output based on
-the input, poolingType and ksize, strides, paddings parameters.
+the input, pooling_type and ksize, strides, paddings parameters.
 Input(X) and output(Out) are in NCHW format, where N is batch size, C is the
 number of channels, H is the height of the feature, and W is the width of the feature.
 Parameters(ksize, strides, paddings) are two elements.
@@ -152,7 +152,7 @@ Pool3dOpMaker::Pool3dOpMaker(framework::OpProto *proto,
             "the number of channels, and D, H and W is the depth, height and "
             "width of the feature, respectively.");
 
-  AddAttr<std::string>("poolingType",
+  AddAttr<std::string>("pooling_type",
                        "(string) Pooling type, can be \"max\" for max-pooling "
                        "and \"avg\" for average-pooling.")
       .InEnum({"max", "avg"});
@@ -160,13 +160,14 @@ Pool3dOpMaker::Pool3dOpMaker(framework::OpProto *proto,
       "ksize",
       "(vector<int>) The pooling window size(depth, height, "
       "width) of pooling operator. "
-      "If globalPooling = true, ksize and paddings will "
+      "If global_pooling = true, ksize and paddings will "
       "be ignored.");  // TODO(Chengduo): Add checker.
                        // (Currently,
   // TypedAttrChecker don't support vector type.)
-  AddAttr<bool>("globalPooling",
+  AddAttr<bool>(
+      "global_pooling",
       "(bool, default false) Whether to use the global pooling. "
-                "If globalPooling = true, ksize and paddings wille be ignored.")
+      "If global_pooling = true, ksize and paddings wille be ignored.")
       .SetDefault(false);
   AddAttr<std::vector<int>>(
       "strides",
@@ -178,7 +179,7 @@ Pool3dOpMaker::Pool3dOpMaker(framework::OpProto *proto,
       "paddings",
       "(vector<int>, defalut {0,0,0}), paddings(depth, height, "
       "width) of pooling operator. "
-      "If globalPooling = true, ksize and paddings will be ignored.")
+      "If global_pooling = true, ksize and paddings will be ignored.")
       .SetDefault({0, 0, 0});  // TODO(Chengduo): Add checker. (Currently,
                                // TypedAttrChecker don't support vector type.)
 
@@ -186,7 +187,7 @@ Pool3dOpMaker::Pool3dOpMaker(framework::OpProto *proto,
 Pool3d Operator.
 
 The pooling3d operation calculates the output based on
-the input, poolingType, ksize, strides, and paddings parameters.
+the input, pooling_type, ksize, strides, and paddings parameters.
 Input(X) and output(Out) are in NCDHW format, where N is batch
 size, C is the number of channels, and D, H and W are the depth, height and
 width of the feature, respectively. Parameters(ksize, strides, paddings) 

paddle/operators/pool_op.h

@@ -57,11 +57,11 @@ class PoolKernel : public framework::OpKernel<T> {
     const Tensor* in_x = context.Input<Tensor>("X");
     Tensor* out = context.Output<Tensor>("Out");
 
-    std::string pooling_type = context.Attr<std::string>("poolingType");
+    std::string pooling_type = context.Attr<std::string>("pooling_type");
     std::vector<int> ksize = context.Attr<std::vector<int>>("ksize");
     std::vector<int> strides = context.Attr<std::vector<int>>("strides");
     std::vector<int> paddings = context.Attr<std::vector<int>>("paddings");
-    if (context.Attr<bool>("globalPooling")) {
+    if (context.Attr<bool>("global_pooling")) {
       for (size_t i = 0; i < ksize.size(); ++i) {
         paddings[i] = 0;
         ksize[i] = static_cast<int>(in_x->dims()[i + 2]);
@@ -119,12 +119,12 @@ class PoolGradKernel : public framework::OpKernel<T> {
         context.Input<Tensor>(framework::GradVarName("Out"));
     Tensor* in_x_grad = context.Output<Tensor>(framework::GradVarName("X"));
 
-    std::string pooling_type = context.Attr<std::string>("poolingType");
+    std::string pooling_type = context.Attr<std::string>("pooling_type");
     std::vector<int> ksize = context.Attr<std::vector<int>>("ksize");
     std::vector<int> strides = context.Attr<std::vector<int>>("strides");
     std::vector<int> paddings = context.Attr<std::vector<int>>("paddings");
 
-    if (context.Attr<bool>("globalPooling")) {
+    if (context.Attr<bool>("global_pooling")) {
       for (size_t i = 0; i < ksize.size(); ++i) {
         paddings[i] = 0;
         ksize[i] = static_cast<int>(in_x->dims()[i + 2]);

paddle/operators/pool_with_index_op.cc

@@ -44,7 +44,7 @@ class MaxPoolWithIndexOp : public framework::OperatorWithKernel {
     PADDLE_ENFORCE(in_x_dims.size() == 4 || in_x_dims.size() == 5,
                    "Pooling intput should be 4-D or 5-D tensor.");
 
-    if (ctx->Attrs().Get<bool>("globalPooling")) {
+    if (ctx->Attrs().Get<bool>("global_pooling")) {
       ksize.resize(static_cast<size_t>(in_x_dims.size()) - 2);
       for (size_t i = 0; i < ksize.size(); ++i) {
         paddings[i] = 0;
@@ -110,14 +110,14 @@ class MaxPool2dWithIndexOpMaker : public framework::OpProtoAndCheckerMaker {
     AddAttr<std::vector<int>>("ksize",
                               "(vector<int>) The pooling window size(height, "
                               "width) of pooling operator. "
-                              "If globalPooling = true, ksize and paddings "
+                              "If global_pooling = true, ksize and paddings "
                               "will be ignored.");  // TODO(Chengduo): Add
                                                     // checker. (Currently,
     // TypedAttrChecker don't support vector type.)
     AddAttr<bool>(
-        "globalPooling",
+        "global_pooling",
         "(bool, default false) Whether to use the global pooling. "
-        "If globalPooling = true, ksize and paddings will be ignored.")
+        "If global_pooling = true, ksize and paddings will be ignored.")
         .SetDefault(false);
     AddAttr<std::vector<int>>("strides",
                               "(vector<int>, default {1, 1}), strides(height, "
@@ -128,7 +128,7 @@ class MaxPool2dWithIndexOpMaker : public framework::OpProtoAndCheckerMaker {
         "paddings",
         "(vector<int>, defalut {0, 0}), paddings(height, width) of pooling "
         "operator. "
-        "If globalPooling = true, paddings and will be ignored.")
+        "If global_pooling = true, paddings and will be ignored.")
         .SetDefault({0, 0});  // TODO(Chengduo): Add checker. (Currently,
     // TypedAttrChecker don't support vector type.)
 
@@ -188,14 +188,14 @@ class MaxPool3dWithIndexOpMaker : public framework::OpProtoAndCheckerMaker {
     AddAttr<std::vector<int>>("ksize",
                               "(vector<int>) The pooling window size(depth, "
                               "height, width) of pooling operator. "
-                              "If globalPooling = true, ksize and paddings "
+                              "If global_pooling = true, ksize and paddings "
                               "will be ignored.");  // TODO(Chengduo): Add
                                                     // checker. (Currently,
     // TypedAttrChecker don't support vector type.)
     AddAttr<bool>(
-        "globalPooling",
+        "global_pooling",
         "(bool, default false) Whether to use the global pooling. "
-        "If globalPooling = true, ksize and paddings will be ignored.")
+        "If global_pooling = true, ksize and paddings will be ignored.")
         .SetDefault(false);
     AddAttr<std::vector<int>>("strides",
                               "(vector<int>, default {1,1,1}), strides(depth, "
@@ -206,7 +206,7 @@ class MaxPool3dWithIndexOpMaker : public framework::OpProtoAndCheckerMaker {
         "paddings",
         "(vector, defalut {0,0,0}), paddings(depth, "
         "height, width) of pooling operator. "
-        "If globalPooling = true, paddings and ksize will be ignored.")
+        "If global_pooling = true, paddings and ksize will be ignored.")
         .SetDefault({0, 0, 0});  // TODO(Chengduo): Add checker. (Currently,
     // TypedAttrChecker don't support vector type.)
 

paddle/operators/pool_with_index_op.h

@@ -35,7 +35,7 @@ class MaxPoolWithIndexKernel : public framework::OpKernel<T> {
     std::vector<int> ksize = context.Attr<std::vector<int>>("ksize");
     std::vector<int> strides = context.Attr<std::vector<int>>("strides");
     std::vector<int> paddings = context.Attr<std::vector<int>>("paddings");
-    if (context.Attr<bool>("globalPooling")) {
+    if (context.Attr<bool>("global_pooling")) {
       for (size_t i = 0; i < ksize.size(); ++i) {
         paddings[i] = 0;
         ksize[i] = static_cast<int>(in_x->dims()[i + 2]);
@@ -72,7 +72,7 @@ class MaxPoolWithIndexGradKernel : public framework::OpKernel<T> {
     std::vector<int> ksize = context.Attr<std::vector<int>>("ksize");
     std::vector<int> strides = context.Attr<std::vector<int>>("strides");
     std::vector<int> paddings = context.Attr<std::vector<int>>("paddings");
-    if (context.Attr<bool>("globalPooling")) {
+    if (context.Attr<bool>("global_pooling")) {
       for (size_t i = 0; i < ksize.size(); ++i) {
         paddings[i] = 0;
         ksize[i] = static_cast<int>(in_x_grad->dims()[i + 2]);

paddle/operators/recurrent_op.cc

@@ -387,8 +387,8 @@ class RecurrentGradOp : public RecurrentBase {
         auto &p_names = Inputs(kParameters);
         PADDLE_ENFORCE_EQ(pg_names.size(), p_names.size());
 
-        for (size_t prog_id = 0; prog_id < pg_names.size(); ++prog_id) {
-          auto inside_grad_name = framework::GradVarName(p_names[prog_id]);
+        for (size_t param_id = 0; param_id < pg_names.size(); ++param_id) {
+          auto inside_grad_name = framework::GradVarName(p_names[param_id]);
 
           // If does not compute gradient of that variable inside rnn, just
           // continue
@@ -406,27 +406,19 @@ class RecurrentGradOp : public RecurrentBase {
             attrs["value"] = 0.0f;
 
             auto zero_op = framework::OpRegistry::CreateOp(
-                "fill_constant", {}, {{"Out", {pg_names[prog_id]}}}, attrs);
+                "fill_constant", {}, {{"Out", {pg_names[param_id]}}}, attrs);
             zero_op->Run(scope, dev_ctx);
           }
 
+          auto new_inside_name = cur_scope.Rename(inside_grad_name);
           // sum gradient
-          auto *outside_var = scope.FindVar(pg_names[prog_id]);
-          PADDLE_ENFORCE(outside_var != nullptr);
-          auto &outside_tensor =
-              *outside_var->GetMutable<framework::LoDTensor>();
-
-          std::string result_var_name;
-          auto *local_result_var = cur_scope.Var(&result_var_name);
-          auto &local_result_tensor =
-              *local_result_var->GetMutable<framework::LoDTensor>();
-
-          local_result_tensor.ShareDataWith(outside_tensor);
 
           auto sum_op = framework::OpRegistry::CreateOp(
-              "sum", {{"X", {result_var_name, inside_grad_name}}},
-              {{"Out", {result_var_name}}}, {});
+              "sum", {{"X", {pg_names[param_id], new_inside_name}}},
+              {{"Out", {pg_names[param_id]}}}, {});
           sum_op->Run(cur_scope, dev_ctx);
+
+          cur_scope.Rename(new_inside_name, inside_grad_name);
         }
       }
       VLOG(5) << "Accumulate Parameter finished ";

paddle/operators/sequence_concat_op.cc

@@ -68,12 +68,9 @@ class SequenceConcatOpMaker : public framework::OpProtoAndCheckerMaker {
                  "The level should be less than the level number of inputs.")
         .SetDefault(0);
     AddComment(R"DOC(
-Sequence Concat Operator.
-
 The sequence_concat operator concatenates multiple LoDTensors. 
-It supports a sequence (LoD Tensor with level number is 1)
+It only supports sequence (LoD Tensor with level number is 1) 
 or a nested sequence (LoD tensor with level number is 2) as its input.
-The following examples explain how the operator works:
 - Case1:
   If the axis is other than 0(here, axis is 1 and level is 1),
   each input should have the same LoD information and the LoD 
@@ -86,20 +83,27 @@ The following examples explain how the operator works:
 - Case2:
   If the axis is 0(here, leve is 0), the inputs are concatenated along 
   time steps, the LoD information of the output need to re-compute.
+  The LoD information of level-1 should be same.
 
   LoD(x0) = {{0,2,4}, {0,1,2,3,4}}; Dims(x0) = (4,3,4)
-    LoD(x1) = {{0,3,5}, {0,1,2,3,5}}; Dims(x1) = (5,3,4)
-    LoD(Out) = {{0,5,9}, {0,1,2,3,4,5,6,7,9}}; Dims(Out) = (9,3,4)
+  LoD(x1) = {{0,2,4}, {0,1,3,5,7}}; Dims(x1) = (7,3,4)
+  LoD(Out) = {{0,2,4}, {0,2,5,8,11}}; Dims(Out) = (11,3,4)
 
 - Case3:
   If the axis is 0(here, level is 1).
 
   LoD(x0) = {{0,2,4}, {0,1,2,3,4}}; Dims(x0) = (4,3,4)
-    LoD(x1) = {{0,3,5}, {0,1,3,4,5}}; Dims(x1) = (5,3,4)
-    LoD(Out) = {{0,5,9}, {0,2,5,7,9}}; Dims(Out) = (9,3,4)
+  LoD(x1) = {{0,3,4}, {0,1,3,5,7}}; Dims(x1) = (7,3,4)
+  LoD(Out) = {{0,5,8}, {0,1,2,3,5,7,8,9,11}}; Dims(Out) = (11,3,4)
 
-NOTE: The levels of all the inputs should be the same.
+- Case4:
+  If the LoD number is 1, axis is 0, level is 0
 
+  LoD(x0) = {{0,1,2,3,4}}; Dims(x0) = (4,3,4)
+  LoD(x1) = {{0,1,3,5,7}}; Dims(x1) = (7,3,4)
+  LoD(Out) = {{0,2,5,8,11}}; Dims(Out) = (11,3,4)
+
+NOTE: The levels of all the inputs should be the same.
     )DOC");
   }
 };

paddle/operators/sequence_concat_op.cu

@@ -12,8 +12,6 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
-#define EIGEN_USE_GPU
-
 #include "paddle/operators/sequence_concat_op.h"
 
 namespace ops = paddle::operators;

paddle/operators/sequence_concat_op.h

@@ -24,28 +24,38 @@ using LoDTensor = framework::LoDTensor;
 using LoD = framework::LoD;
 
 template <typename T>
-LoD concatLoD(const std::vector<const T*> ins, const size_t axis,
-              const size_t level) {
+LoD ConcatLoD(const std::vector<const T*> ins, const size_t level) {
   auto out_lod = ins[0]->lod();
+  auto numLevels = ins[0]->NumLevels();
   const size_t n = ins.size();
-  if (axis == 0UL) {
+  const size_t level_idx = ins[0]->NumLevels() - 1 - level;
   for (size_t i = 1; i < n; ++i) {
-      for (size_t j = 0; j < ins[i]->lod()[0].size(); ++j) {
-        out_lod[0][j] += ins[i]->lod()[0][j];
+    for (size_t j = 0; j < ins[i]->lod()[level_idx].size(); ++j) {
+      out_lod[level_idx][j] += ins[i]->lod()[level_idx][j];
+    }
   }
 
-      if (ins[0]->NumLevels() == 2) {
-        for (size_t j = 1; j < ins[i]->lod()[1].size(); ++j) {
-          if (level == 0UL) {
-            out_lod[1].push_back(out_lod[1].back() + ins[i]->lod()[1][j] -
-                                 ins[i]->lod()[1][j - 1]);
-          } else if (level == 1UL) {
-            out_lod[1][j] += ins[1]->lod()[1][j];
+  for (size_t i = level_idx; i < numLevels - 1; ++i) {
+    size_t lod_len = 1;
+    for (size_t j = 0; j < n; ++j) {
+      lod_len += ins[j]->lod()[i + 1].size() - 1;
     }
+    out_lod[i + 1].clear();
+    out_lod[i + 1].resize(lod_len);
+
+    size_t idx = 1;
+    for (size_t j = 0; j < ins[0]->lod()[i].size() - 1; ++j) {
+      for (size_t k = 0; k < n; ++k) {
+        for (size_t m = ins[k]->lod()[i][j]; m < ins[k]->lod()[i][j + 1]; ++m) {
+          out_lod[i + 1][idx] = out_lod[i + 1][idx - 1] +
+                                ins[k]->lod()[i + 1][m + 1] -
+                                ins[k]->lod()[i + 1][m];
+          idx++;
         }
       }
     }
   }
+
   return out_lod;
 }
 
@@ -82,18 +92,21 @@ class SequenceConcatOpKernel : public framework::OpKernel<T> {
                       "should be greater than the specify level");
 
     out->mutable_data<T>(ctx.GetPlace());
-    auto out_lod = concatLoD<LoDTensor>(ins, axis, level);
+    auto out_lod = ins[0]->lod();
+    if (axis == 0) {
+      out_lod = ConcatLoD<LoDTensor>(ins, level);
+    }
     out->set_lod(out_lod);
 
-    auto out_lod_level = out_lod[level];
+    const size_t level_idx = out_lod.size() - level - 1;
+    auto out_lod_level = framework::ToAbsOffset(out_lod)[level_idx];
     for (size_t i = 0; i < out_lod_level.size() - 1; ++i) {
       Tensor out_t = out->Slice(static_cast<int>(out_lod_level[i]),
                                 static_cast<int>(out_lod_level[i + 1]));
       auto out_stride = framework::stride(out_t.dims());
       size_t offset = 0;
-
       for (size_t j = 0; j < n; ++j) {
-        auto in_lod_level = ins[j]->lod()[level];
+        auto in_lod_level = framework::ToAbsOffset(ins[j]->lod())[level_idx];
         auto in_stride = framework::stride(ins[j]->dims());
         Tensor in_t = ins[j]->Slice(static_cast<int>(in_lod_level[i]),
                                     static_cast<int>(in_lod_level[i + 1]));
@@ -124,9 +137,12 @@ class SequenceConcatGradOpKernel : public framework::OpKernel<T> {
       x_grads[i]->set_lod(ins[i]->lod());
       x_grads[i]->mutable_data<T>(ctx.GetPlace());
     }
-
-    auto out_lod = concatLoD<LoDTensor>(ins, axis, level);
-    auto out_lod_level = out_lod[level];
+    auto out_lod = ins[0]->lod();
+    if (axis == 0UL) {
+      out_lod = ConcatLoD<LoDTensor>(ins, level);
+    }
+    const size_t level_idx = out_lod.size() - level - 1;
+    auto out_lod_level = framework::ToAbsOffset(out_lod)[level_idx];
 
     for (size_t i = 0; i < out_lod_level.size() - 1; ++i) {
       Tensor out_grad_t =
@@ -136,7 +152,8 @@ class SequenceConcatGradOpKernel : public framework::OpKernel<T> {
       size_t offset = 0;
 
       for (size_t j = 0; j < n; ++j) {
-        auto x_grad_lod_level = x_grads[j]->lod()[level];
+        auto x_grad_lod_level =
+            framework::ToAbsOffset(x_grads[j]->lod())[level_idx];
         auto x_grad_stride = framework::stride(x_grads[j]->dims());
         Tensor x_grad_t =
             x_grads[j]->Slice(static_cast<int>(x_grad_lod_level[i]),

paddle/operators/sequence_softmax_op.cu

@@ -12,8 +12,6 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
-#define EIGEN_USE_GPU
-
 #include "paddle/operators/sequence_softmax_op.h"
 
 namespace ops = paddle::operators;

paddle/operators/sequence_softmax_op.h

@@ -14,7 +14,6 @@ limitations under the License. */
 
 #pragma once
 
-#include "paddle/framework/eigen.h"
 #include "paddle/framework/op_registry.h"
 #include "paddle/operators/math/softmax.h"
 

paddle/operators/shrink_rnn_memory_op.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+#include "paddle/framework/lod_rank_table.h"
+#include "paddle/operators/array_operator.h"
+#include "paddle/operators/math/math_function.h"
+
+namespace paddle {
+namespace operators {
+
+class ShrinkRNNMemoryOp : public ArrayOp {
+ public:
+  ShrinkRNNMemoryOp(const std::string &type,
+                    const framework::VariableNameMap &inputs,
+                    const framework::VariableNameMap &outputs,
+                    const framework::AttributeMap &attrs)
+      : ArrayOp(type, inputs, outputs, attrs) {}
+
+  void Run(const framework::Scope &scope,
+           const platform::DeviceContext &dev_ctx) const override {
+    auto *x_var = scope.FindVar(Input("X"));
+    PADDLE_ENFORCE(x_var != nullptr, "Input X must be set");
+    auto &x_tensor = x_var->Get<framework::LoDTensor>();
+    size_t offset = this->GetOffset(scope, dev_ctx);
+    auto *rank_table_var = scope.FindVar(Input("RankTable"));
+    PADDLE_ENFORCE(rank_table_var != nullptr, "RankTable must be set");
+    auto &rank_table = rank_table_var->Get<framework::LoDRankTable>();
+
+    auto &rank_items = rank_table.items();
+    int dst_num_rows =
+        std::lower_bound(rank_items.begin(), rank_items.end(), offset,
+                         [](const framework::LoDRankTable::TableItem &a,
+                            size_t b) { return a.length > b; }) -
+        rank_items.begin();
+
+    auto *out_var = scope.FindVar(Output("Out"));
+    PADDLE_ENFORCE(out_var != nullptr, "Output Out must be set");
+    auto &out_tensor = *out_var->GetMutable<framework::LoDTensor>();
+    if (dst_num_rows != 0) {
+      out_tensor.ShareDataWith(x_tensor.Slice(0, dst_num_rows));
+    }
+  }
+};
+
+class ShrinkRNNMemoryOpProtoMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  ShrinkRNNMemoryOpProtoMaker(framework::OpProto *proto,
+                              framework::OpAttrChecker *op_checker)
+      : OpProtoAndCheckerMaker(proto, op_checker) {
+    AddInput("X", "");
+    AddInput("RankTable", "");
+    AddInput("I", "");
+    AddOutput("Out", "");
+    AddComment("");
+  }
+};
+
+class ShrinkRNNMemoryInferShape : public framework::InferShapeBase {
+ public:
+  void operator()(framework::InferShapeContext *context) const override {
+    PADDLE_ENFORCE(context->HasInput("X"));
+    PADDLE_ENFORCE(context->HasInput("I"));
+    PADDLE_ENFORCE(context->HasInput("RankTable"));
+    context->SetOutputDim("Out", context->GetInputDim("X"));
+  }
+};
+
+class ShrinkRNNMemoryGradOp : public ArrayOp {
+ public:
+  ShrinkRNNMemoryGradOp(const std::string &type,
+                        const framework::VariableNameMap &inputs,
+                        const framework::VariableNameMap &outputs,
+                        const framework::AttributeMap &attrs)
+      : ArrayOp(type, inputs, outputs, attrs) {}
+
+  void Run(const framework::Scope &scope,
+           const platform::DeviceContext &dev_ctx) const override {
+    auto *dout_var = scope.FindVar(Input(framework::GradVarName("Out")));
+    auto *dx_var = scope.FindVar(Output(framework::GradVarName("X")));
+    PADDLE_ENFORCE(dx_var != nullptr, "Input Gradient should not be nullptr");
+    auto *x_var = scope.FindVar(Input("X"));
+    PADDLE_ENFORCE(x_var != nullptr);
+
+    auto &x_tensor = x_var->Get<framework::LoDTensor>();
+    auto &dx_tensor = *dx_var->GetMutable<framework::LoDTensor>();
+    dx_tensor.Resize(x_tensor.dims());
+    dx_tensor.mutable_data(x_tensor.place(), x_tensor.type());
+
+    if (dout_var == nullptr) {  // dx_tensor fill zero
+      math::set_constant(dev_ctx, &dx_tensor, 0.0f);
+    } else {
+      auto &dout_tensor = dout_var->Get<framework::LoDTensor>();
+      auto height = dout_tensor.dims()[0];
+      dx_tensor.Slice(0, static_cast<int>(height))
+          .CopyFrom(dout_tensor, dout_tensor.place(), dev_ctx);
+      if (dx_tensor.dims()[0] < height) {
+        auto rest_tensor = dx_tensor.Slice(
+            static_cast<int>(height), static_cast<int>(dout_tensor.dims()[0]));
+        math::set_constant(dev_ctx, &rest_tensor, 0.0f);
+      }
+    }
+  }
+};
+
+class ShrinkRNNMemoryGradInferShape : public framework::InferShapeBase {
+ public:
+  void operator()(framework::InferShapeContext *context) const override {
+    PADDLE_ENFORCE(context->HasInput("X"));
+    PADDLE_ENFORCE(context->HasOutput(framework::GradVarName("X")));
+    context->SetOutputDim(framework::GradVarName("X"),
+                          context->GetInputDim("X"));
+  }
+};
+
+class ShrinkRNNGradOpMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+ protected:
+  std::unique_ptr<framework::OpDescBind> Apply() const override {
+    auto *op = new framework::OpDescBind();
+    op->SetType("shrink_rnn_memory_grad");
+    op->SetInput("X", Input("X"));
+    op->SetInput(framework::GradVarName("Out"), OutputGrad("Out"));
+    op->SetOutput(framework::GradVarName("X"), InputGrad("X"));
+    op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDescBind>(op);
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+REGISTER_OPERATOR(shrink_rnn_memory, ops::ShrinkRNNMemoryOp,
+                  ops::ShrinkRNNMemoryInferShape,
+                  ops::ShrinkRNNMemoryOpProtoMaker, ops::ShrinkRNNGradOpMaker);
+REGISTER_OPERATOR(shrink_rnn_memory_grad, ops::ShrinkRNNMemoryGradOp,
+                  ops::ShrinkRNNMemoryGradInferShape);

paddle/operators/softmax_op.cu

@@ -12,7 +12,6 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#define EIGEN_USE_GPU
 #include "paddle/operators/softmax_op.h"
 
 namespace ops = paddle::operators;

paddle/operators/softmax_op.h

@@ -13,7 +13,6 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #pragma once
-#include "paddle/framework/eigen.h"
 #include "paddle/framework/op_registry.h"
 #include "paddle/operators/math/softmax.h"
 
@@ -21,9 +20,6 @@ namespace paddle {
 namespace operators {
 
 using Tensor = framework::Tensor;
-template <typename T, int MajorType = Eigen::RowMajor,
-          typename IndexType = Eigen::DenseIndex>
-using EigenMatrix = framework::EigenMatrix<T, MajorType, IndexType>;
 
 template <typename Place, typename T>
 class SoftmaxKernel : public framework::OpKernel<T> {

paddle/operators/sum_op.cc

@@ -99,11 +99,12 @@ class SumOpVarTypeInference : public framework::VarTypeInference {
 
     bool any_input_is_lod_tensor = std::any_of(
         inputs.begin(), inputs.end(), [block](const std::string& name) {
-          return block->Var(name)->GetType() == framework::VarDesc::LOD_TENSOR;
+          return block->FindRecursiveOrCreateVar(name)->GetType() ==
+                 framework::VarDesc::LOD_TENSOR;
         });
 
     auto is_tensor_array = [block](const std::string& name) {
-      return block->Var(name)->GetType() ==
+      return block->FindRecursiveOrCreateVar(name)->GetType() ==
              framework::VarDesc::LOD_TENSOR_ARRAY;
     };
 
@@ -120,7 +121,7 @@ class SumOpVarTypeInference : public framework::VarTypeInference {
     }
 
     auto out_var_name = op_desc.Output("Out").front();
-    block->Var(out_var_name)->SetType(var_type);
+    block->FindRecursiveOrCreateVar(out_var_name)->SetType(var_type);
   }
 };
 

paddle/operators/tensor_array_read_write_op.cc

@@ -11,48 +11,18 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License. */
-#include "paddle/framework/lod_tensor_array.h"
-#include "paddle/framework/op_registry.h"
+#include "paddle/operators/array_operator.h"
 
 namespace paddle {
 namespace operators {
-class ArrayOpBase : public framework::OperatorBase {
- public:
-  ArrayOpBase(const std::string &type, const framework::VariableNameMap &inputs,
-              const framework::VariableNameMap &outputs,
-              const framework::AttributeMap &attrs)
-      : OperatorBase(type, inputs, outputs, attrs) {}
-  void Run(const framework::Scope &scope,
-           const platform::DeviceContext &dev_ctx) const override {}
-
- protected:
-  size_t GetOffset(const framework::Scope &scope,
-                   const platform::DeviceContext &dev_ctx) const {
-    auto *i = scope.FindVar(Input("I"));
-    PADDLE_ENFORCE(i != nullptr, "I must be set");
-    auto &i_tensor = i->Get<framework::LoDTensor>();
-    PADDLE_ENFORCE_EQ(i_tensor.numel(), 1);
-    size_t offset;
-    if (platform::is_gpu_place(i_tensor.place())) {
-      // FIXME: Avoid copy from GPU to CPU
-      framework::Tensor t;
-      t.CopyFrom(i_tensor, platform::CPUPlace(), dev_ctx);
-      dev_ctx.Wait();
-      offset = static_cast<size_t>(*t.data<int64_t>());
-    } else {
-      offset = static_cast<size_t>(*i_tensor.data<int64_t>());
-    }
-    return offset;
-  }
-};
 
-class WriteToArrayOp : public ArrayOpBase {
+class WriteToArrayOp : public ArrayOp {
  public:
   WriteToArrayOp(const std::string &type,
                  const framework::VariableNameMap &inputs,
                  const framework::VariableNameMap &outputs,
                  const framework::AttributeMap &attrs)
-      : ArrayOpBase(type, inputs, outputs, attrs) {}
+      : ArrayOp(type, inputs, outputs, attrs) {}
 
   void Run(const framework::Scope &scope,
            const platform::DeviceContext &dev_ctx) const override {
@@ -117,18 +87,19 @@ class WriteToArrayInferVarType : public framework::VarTypeInference {
                   framework::BlockDescBind *block) const override {
     for (auto &out_var : op_desc.OutputArgumentNames()) {
       VLOG(10) << "Set Variable " << out_var << " as LOD_TENSOR_ARRAY";
-      block->Var(out_var)->SetType(framework::VarDesc::LOD_TENSOR_ARRAY);
+      block->FindRecursiveOrCreateVar(out_var)->SetType(
+          framework::VarDesc::LOD_TENSOR_ARRAY);
     }
   }
 };
 
-class ReadFromArrayOp : public ArrayOpBase {
+class ReadFromArrayOp : public ArrayOp {
  public:
   ReadFromArrayOp(const std::string &type,
                   const framework::VariableNameMap &inputs,
                   const framework::VariableNameMap &outputs,
                   const framework::AttributeMap &attrs)
-      : ArrayOpBase(type, inputs, outputs, attrs) {}
+      : ArrayOp(type, inputs, outputs, attrs) {}
   void Run(const framework::Scope &scope,
            const platform::DeviceContext &dev_ctx) const override {
     auto *x = scope.FindVar(Input("X"));

paddle/operators/while_op.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+
+#include <vector>
+#include "paddle/framework/executor.h"
+#include "paddle/framework/op_registry.h"
+#include "paddle/framework/operator.h"
+
+namespace paddle {
+namespace operators {
+
+using StepScopeVar = std::vector<framework::Scope *>;
+using LoDTensor = framework::LoDTensor;
+
+constexpr char kStepBlock[] = "step_block";
+constexpr char kCondition[] = "Condition";
+constexpr char kStepScopes[] = "StepScopes";
+constexpr char kParamGrads[] = "X@Grad";
+constexpr char kParameters[] = "X";
+
+class WhileOp : public framework::OperatorBase {
+ public:
+  WhileOp(const std::string &type, const framework::VariableNameMap &inputs,
+          const framework::VariableNameMap &outputs,
+          const framework::AttributeMap &attrs)
+      : framework::OperatorBase(type, inputs, outputs, attrs) {}
+
+  void Run(const framework::Scope &scope,
+           const platform::DeviceContext &dev_ctx) const override {
+    PADDLE_ENFORCE_NOT_NULL(scope.FindVar(Input(kCondition)));
+    auto &cond = scope.FindVar(Input(kCondition))->Get<LoDTensor>();
+    PADDLE_ENFORCE_EQ(cond.dims(), paddle::framework::make_ddim({1}));
+
+    framework::Executor executor(dev_ctx);
+    auto *block = Attr<framework::BlockDescBind *>(kStepBlock);
+    auto *program = block->Program();
+
+    auto step_scopes =
+        scope.FindVar(Output(kStepScopes))->GetMutable<StepScopeVar>();
+
+    while (cond.data<bool>()[0]) {
+      auto &current_scope = scope.NewScope();
+      step_scopes->push_back(&current_scope);
+
+      executor.Run(*program, &current_scope, block->ID(),
+                   false /*create_local_scope*/);
+    }
+  }
+};
+
+class WhileOpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  WhileOpMaker(framework::OpProto *proto, framework::OpAttrChecker *op_checker)
+      : OpProtoAndCheckerMaker(proto, op_checker) {
+    AddInput(kParameters,
+             "A set of variables, which are required by operators inside the "
+             "block of While Op.")
+        .AsDuplicable();
+    AddInput(
+        kCondition,
+        "(Bool) An scalar. When it's False, the While Op will be terminated.")
+        .AsDuplicable();
+    AddOutput("Out",
+              "A set of variables, which will be assigned with values "
+              "generated by perators inside the block of While Op.")
+        .AsDuplicable();
+    AddOutput(kStepScopes,
+              "(StepScopeVar) A vector of local scope, which size equals the "
+              "step number of While Op. The i'th scope storages temporary "
+              "variables generated in the i'th step.");
+    AddAttr<framework::BlockDescBind *>(kStepBlock,
+                                        "The step block inside WhileOp");
+    AddComment(R"DOC(
+)DOC");
+  }
+};
+
+class WhileGradOp : public framework::OperatorBase {
+ public:
+  WhileGradOp(const std::string &type, const framework::VariableNameMap &inputs,
+              const framework::VariableNameMap &outputs,
+              const framework::AttributeMap &attrs)
+      : framework::OperatorBase(type, inputs, outputs, attrs) {}
+
+  void Run(const framework::Scope &scope,
+           const platform::DeviceContext &dev_ctx) const override {
+    //    PADDLE_ENFORCE(...)
+
+    framework::Executor executor(dev_ctx);
+    auto *block = Attr<framework::BlockDescBind *>(kStepBlock);
+    auto *program = block->Program();
+
+    auto *step_scopes =
+        scope.FindVar(Input(kStepScopes))->GetMutable<StepScopeVar>();
+
+    for (auto cur_scope_iter = step_scopes->rbegin();
+         cur_scope_iter != step_scopes->rend(); ++cur_scope_iter) {
+      executor.Run(*program, *cur_scope_iter, block->ID(), false);
+
+      auto &pg_names = Outputs(kParamGrads);
+      auto &p_names = Inputs(kParameters);
+      PADDLE_ENFORCE_EQ(pg_names.size(), p_names.size());
+      for (size_t prog_id = 0; prog_id < pg_names.size(); ++prog_id) {
+        auto inside_grad_name = framework::GradVarName(p_names[prog_id]);
+
+        //  // TODO(tonyyang-savil: Not sure we need the following
+        //  // If does not compute gradient of that variable inside rnn,
+        //  just
+        //  // continue
+        //  if (local_var_names.find(inside_grad_name) ==
+        //  local_var_names.end()) {
+        //    continue;
+        //  }
+
+        // zero gradient variable in step 0
+        if (cur_scope_iter == step_scopes->rbegin()) {
+          auto *var = (*cur_scope_iter)->FindVar(inside_grad_name);
+          PADDLE_ENFORCE_NOT_NULL(var);
+          if (var->IsType<LoDTensor>()) {
+            auto &inside_tensor = var->Get<framework::LoDTensor>();
+            framework::AttributeMap attrs;
+            attrs["data_type"] = framework::ToDataType(inside_tensor.type());
+            attrs["shape"] = framework::vectorize2int(inside_tensor.dims());
+            attrs["value"] = 0.0f;
+
+            auto zero_op = framework::OpRegistry::CreateOp(
+                "fill_constant", {}, {{"Out", {pg_names[prog_id]}}}, attrs);
+            zero_op->Run(scope, dev_ctx);
+          }
+        }
+
+        // sum gradient
+        auto *outside_var = scope.FindVar(pg_names[prog_id]);
+        PADDLE_ENFORCE_NOT_NULL(outside_var);
+        auto &outside_tensor = *outside_var->GetMutable<framework::LoDTensor>();
+
+        std::string result_var_name;
+        auto *local_result_var = (*cur_scope_iter)->Var(&result_var_name);
+        auto &local_result_tensor =
+            *local_result_var->GetMutable<framework::LoDTensor>();
+
+        local_result_tensor.ShareDataWith(outside_tensor);
+
+        auto sum_op = framework::OpRegistry::CreateOp(
+            "sum", {{"X", {result_var_name, inside_grad_name}}},
+            {{"Out", {result_var_name}}}, {});
+        sum_op->Run(**cur_scope_iter, dev_ctx);
+      }
+    }
+  }
+};
+
+class WhileGradOpDescMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+ protected:
+  virtual std::unique_ptr<framework::OpDescBind> Apply() const {
+    auto *grad = new framework::OpDescBind();
+    grad->SetType("while_grad");
+    for (auto &input_param : this->InputNames()) {
+      grad->SetInput(input_param, this->Input(input_param));
+      grad->SetOutput(framework::GradVarName(input_param),
+                      this->InputGrad(input_param));
+    }
+
+    for (auto &output_param : this->OutputNames()) {
+      grad->SetInput(output_param, this->Output(output_param));
+      if (output_param != kStepScopes) {
+        grad->SetInput(framework::GradVarName(output_param),
+                       this->OutputGrad(output_param));
+      }
+    }
+    grad->SetAttrMap(this->Attrs());
+    grad->SetBlockAttr(kStepBlock, *grad_block_[0]);
+
+    return std::unique_ptr<framework::OpDescBind>(grad);
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+REGISTER_OPERATOR(while, paddle::operators::WhileOp,
+                  paddle::operators::WhileOpMaker,
+                  paddle::operators::WhileGradOpDescMaker);

paddle/platform/call_once.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+
+#pragma once
+
+#include <mutex>
+
+namespace paddle {
+namespace platform {
+
+/*
+ The current implementation of std::call_once has a bug described in
+ https://stackoverflow.com/questions/41717579/stdcall-once-hangs-on-second-call-after-callable-threw-on-first-call.
+ This is likely caused by a deeper bug of pthread_once, which is discussed in
+ https://patchwork.ozlabs.org/patch/482350/
+
+ This wrap is a hack to avoid this bug.
+*/
+template <class Callable, class... Args>
+inline void call_once(std::once_flag& flag, Callable&& f, Args&&... args) {
+  bool good = false;
+  std::exception ex;
+  std::call_once(flag, [&]() {
+    try {
+      f(args...);
+      good = true;
+    } catch (const std::exception& e) {
+      ex = e;
+    } catch (...) {
+      ex = std::runtime_error("excption caught in call_once");
+    }
+  });
+  if (!good) {
+    throw std::exception(ex);
+  }
+}
+
+}  // namespace platform
+}  // namespace paddle

paddle/platform/dynload/nccl.h

@@ -17,6 +17,7 @@
 #include <dlfcn.h>
 #include <nccl.h>
 #include <mutex>
+#include "paddle/platform/call_once.h"
 #include "paddle/platform/dynload/dynamic_loader.h"
 
 namespace paddle {
@@ -32,7 +33,7 @@ extern void* nccl_dso_handle;
     template <typename... Args>                                        \
     auto operator()(Args... args) -> decltype(__name(args...)) {       \
       using nccl_func = decltype(__name(args...)) (*)(Args...);        \
-      std::call_once(nccl_dso_flag,                               \
+      platform::call_once(nccl_dso_flag,                               \
                           paddle::platform::dynload::GetNCCLDsoHandle, \
                           &nccl_dso_handle);                           \
       void* p_##__name = dlsym(nccl_dso_handle, #__name);              \

paddle/platform/transform.h

@@ -49,8 +49,6 @@ struct Transform<platform::CPUPlace> {
   template <typename InputIter, typename OutputIter, typename UnaryOperation>
   void operator()(const DeviceContext& context, InputIter first, InputIter last,
                   OutputIter result, UnaryOperation op) {
-    auto place = context.GetPlace();
-    PADDLE_ENFORCE(is_cpu_place(place), "It must use CPU place.");
     std::transform(first, last, result, op);
   }
 
@@ -59,8 +57,6 @@ struct Transform<platform::CPUPlace> {
   void operator()(const DeviceContext& context, InputIter1 first1,
                   InputIter1 last1, InputIter2 first2, OutputIter result,
                   BinaryOperation op) {
-    auto place = context.GetPlace();
-    PADDLE_ENFORCE(is_cpu_place(place), "It must use CPU place.");
     std::transform(first1, last1, first2, result, op);
   }
 };

proto/ModelConfig.proto

@@ -321,6 +321,19 @@ message ClipConfig {
   required double max = 2;
 }
 
+message ROIPoolConfig {
+  required uint32 pooled_width = 1;
+  required uint32 pooled_height = 2;
+  required float spatial_scale = 3;
+  optional uint32 height = 4 [ default = 1 ];
+  optional uint32 width = 5 [ default = 1 ];
+}
+
+message ScaleSubRegionConfig {
+  required ImageConfig image_conf = 1;
+  required float value = 2;
+}
+
 message LayerInputConfig {
   required string input_layer_name = 1;
   optional string input_parameter_name = 2;
@@ -342,6 +355,8 @@ message LayerInputConfig {
   optional MultiBoxLossConfig multibox_loss_conf = 16;
   optional DetectionOutputConfig detection_output_conf = 17;
   optional ClipConfig clip_conf = 18;
+  optional ScaleSubRegionConfig scale_sub_region_conf = 19;
+  optional ROIPoolConfig roi_pool_conf = 20;
 }
 
 message LayerConfig {

python/paddle/trainer/config_parser.py

@@ -1969,6 +1969,18 @@ class DetectionOutputLayer(LayerBase):
         self.config.size = size
 
 
+@config_layer('roi_pool')
+class ROIPoolLayer(LayerBase):
+    def __init__(self, name, inputs, pooled_width, pooled_height, spatial_scale,
+                 num_channels, **xargs):
+        super(ROIPoolLayer, self).__init__(name, 'roi_pool', 0, inputs)
+        config_assert(len(inputs) == 2, 'ROIPoolLayer must have 2 inputs')
+        self.config.inputs[0].roi_pool_conf.pooled_width = pooled_width
+        self.config.inputs[0].roi_pool_conf.pooled_height = pooled_height
+        self.config.inputs[0].roi_pool_conf.spatial_scale = spatial_scale
+        self.set_cnn_layer(name, pooled_height, pooled_width, num_channels)
+
+
 @config_layer('data')
 class DataLayer(LayerBase):
     def __init__(self,
@@ -3801,6 +3813,25 @@ class SwitchOrderLayer(LayerBase):
         self.config.reshape_conf.width_axis.extend(reshape['width'])
 
 
+@config_layer('scale_sub_region')
+class ScaleSubRegionLayer(LayerBase):
+    def __init__(self, name, inputs, value, **xargs):
+        super(ScaleSubRegionLayer, self).__init__(
+            name, 'scale_sub_region', 0, inputs=inputs, **xargs)
+        scale_sub_region_conf = self.config.inputs[0].scale_sub_region_conf
+        scale_sub_region_conf.value = value
+
+        # get channel, width and height from input_0 layer
+        input_layer = self.get_input_layer(0)
+        image_conf = scale_sub_region_conf.image_conf
+        image_conf.img_size = input_layer.width
+        image_conf.img_size_y = input_layer.height
+        image_conf.channels = input_layer.size / (input_layer.width *
+                                                  input_layer.height)
+        self.set_cnn_layer(name, image_conf.img_size_y, image_conf.img_size,
+                           image_conf.channels)
+
+
 # Deprecated, use a new layer specific class instead
 @config_func
 def Layer(name, type, **xargs):

python/paddle/trainer_config_helpers/layers.py

@@ -122,6 +122,7 @@ __all__ = [
     'cross_channel_norm_layer',
     'multibox_loss_layer',
     'detection_output_layer',
+    'roi_pool_layer',
     'spp_layer',
     'pad_layer',
     'eos_layer',
@@ -144,6 +145,7 @@ __all__ = [
     'img_conv3d_layer',
     'resize_layer',
     'sub_seq_layer',
+    'scale_sub_region_layer',
 ]
 
 
@@ -220,6 +222,7 @@ class LayerType(object):
     PRIORBOX_LAYER = 'priorbox'
     MULTIBOX_LOSS_LAYER = 'multibox_loss'
     DETECTION_OUTPUT_LAYER = 'detection_output'
+    ROI_POOL_LAYER = 'roi_pool'
 
     CTC_LAYER = 'ctc'
     WARP_CTC_LAYER = 'warp_ctc'
@@ -255,6 +258,8 @@ class LayerType(object):
     RESIZE = 'resize'
     SUB_SEQ_LAYER = 'subseq'
 
+    SCALE_SUB_REGION_LAYER = 'scale_sub_region'
+
     @staticmethod
     def is_layer_type(type_name):
         """
@@ -786,10 +791,9 @@ class MixedLayerType(LayerOutput):
         :type size: int
         :param act: Activation type.
         :type act: BaseActivation
-        :param bias_attr: The Bias Attribute. If the parameter is set to
-                          False or something not type of ParameterAttribute,
-                          no bias is defined. If the parameter is set to
-                          True, the bias is initialized to zero.
+        :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                          whose type is not ParameterAttribute, no bias is defined. If the
+                          parameter is set to True, the bias is initialized to zero.
         :type bias_attr: ParameterAttribute | None | bool | Any
         :param layer_attr: Extra Layer Attribute.
         :type layer_attr: ExtraLayerAttribute or None
@@ -886,10 +890,9 @@ def mixed_layer(size=0,
                   then this function will just return layer's name.
     :param act: Activation Type. LinearActivation is the default.
     :type act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: The extra layer config. Default is None.
     :type layer_attr: ExtraLayerAttribute
@@ -1031,10 +1034,9 @@ def fc_layer(input,
     :type act: BaseActivation
     :param param_attr: The Parameter Attribute|list.
     :type param_attr: ParameterAttribute
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: Extra Layer config.
     :type layer_attr: ExtraLayerAttribute | None
@@ -1305,6 +1307,50 @@ def detection_output_layer(input_loc,
         name, LayerType.DETECTION_OUTPUT_LAYER, parents=parents, size=size)
 
 
+@wrap_name_default("roi_pool")
+def roi_pool_layer(input,
+                   rois,
+                   pooled_width,
+                   pooled_height,
+                   spatial_scale,
+                   num_channels=None,
+                   name=None):
+    """
+    A layer used by Fast R-CNN to extract feature maps of ROIs from the last
+    feature map.
+
+    :param name: The Layer Name.
+    :type name: basestring
+    :param input: The input layer.
+    :type input: LayerOutput.
+    :param rois: The input ROIs' data.
+    :type rois: LayerOutput.
+    :param pooled_width: The width after pooling.
+    :type pooled_width: int
+    :param pooled_height: The height after pooling.
+    :type pooled_height: int
+    :param spatial_scale: The spatial scale between the image and feature map.
+    :type spatial_scale: float
+    :param num_channels: number of input channel.
+    :type num_channels: int
+    :return: LayerOutput
+    """
+    if num_channels is None:
+        assert input.num_filters is not None
+        num_channels = input.num_filters
+    size = num_channels * pooled_width * pooled_height
+    Layer(
+        name=name,
+        type=LayerType.ROI_POOL_LAYER,
+        inputs=[input.name, rois.name],
+        pooled_width=pooled_width,
+        pooled_height=pooled_height,
+        spatial_scale=spatial_scale,
+        num_channels=num_channels)
+    return LayerOutput(
+        name, LayerType.ROI_POOL_LAYER, parents=[input, rois], size=size)
+
+
 @wrap_name_default("cross_channel_norm")
 def cross_channel_norm_layer(input, name=None, param_attr=None):
     """
@@ -1387,10 +1433,9 @@ def pooling_layer(input,
     :type pooling_type: BasePoolingType | None
     :param stride: The step size between successive pooling regions.
     :type stride: Int
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: The Extra Attributes for layer, such as dropout.
     :type layer_attr: ExtraLayerAttribute | None
@@ -1488,10 +1533,9 @@ def lstmemory(input,
     :type gate_act: BaseActivation
     :param state_act: state activation type, TanhActivation by default.
     :type state_act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param param_attr: Parameter Attribute.
     :type param_attr: ParameterAttribute | None | False
@@ -1614,10 +1658,9 @@ def grumemory(input,
                      This activation affects the :math:`z_t` and :math:`r_t`. It is the
                      :math:`\\sigma` in the above formula.
     :type gate_act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param param_attr: Parameter Attribute.
     :type param_attr: ParameterAttribute | None | False
@@ -1814,10 +1857,9 @@ def expand_layer(input,
     :type expand_as: LayerOutput
     :param name: The name of this layer. It is optional.
     :type name: basestring
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param expand_level: whether input layer is timestep(default) or sequence.
     :type expand_level: ExpandLevel
@@ -1936,10 +1978,9 @@ def seq_reshape_layer(input,
     :type act: BaseActivation
     :param layer_attr: extra layer attributes.
     :type layer_attr: ExtraLayerAttribute.
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -2323,10 +2364,9 @@ def hsigmoid(input,
     :type num_classes: int | None
     :param name: The name of this layer. It is optional.
     :type name: basestring
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param param_attr: Parameter Attribute. None means default parameter.
     :type param_attr: ParameterAttribute | None
@@ -2466,10 +2506,9 @@ def img_conv_layer(input,
     :type dilation: int | tuple | list
     :param dilation_y: The y dimension of the dilation.
     :type dilation_y: int
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param num_channels: number of input channels. If None will be set
                         automatically from previous output.
@@ -3216,10 +3255,9 @@ def addto_layer(input, act=None, name=None, bias_attr=None, layer_attr=None):
     :type input: LayerOutput | list | tuple
     :param act: Activation Type. LinearActivation is the default.
     :type act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: Extra Layer attribute.
     :type layer_attr: ExtraLayerAttribute
@@ -3372,10 +3410,9 @@ def seq_concat_layer(a, b, act=None, name=None, layer_attr=None,
     :type act: BaseActivation
     :param layer_attr: Extra Layer Attribute.
     :type layer_attr: ExtraLayerAttribute
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -3555,10 +3592,9 @@ def lstm_step_layer(input,
     :type gate_act: BaseActivation
     :param state_act: State Activation Type. TanhActivation is the default.
     :type state_act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: layer's extra attribute.
     :type layer_attr: ExtraLayerAttribute
@@ -3614,10 +3650,9 @@ def gru_step_layer(input,
     :param name: The name of this layer. It is optional.
     :param gate_act: Activation type of this layer's two gates. Default is Sigmoid.
     :type gate_act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param param_attr: the parameter_attribute for transforming the output_mem
                        from previous step.
@@ -3677,10 +3712,9 @@ def gru_step_naive_layer(input,
     :type act: BaseActivation
     :param gate_act: Activation type of this layer's two gates. Default is Sigmoid.
     :type gate_act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param param_attr:
     :param layer_attr:
@@ -3810,10 +3844,9 @@ def recurrent_layer(input,
     :type input: LayerOutput
     :param act: Activation type. TanhActivation is the default.
     :type act: BaseActivation
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param param_attr: parameter attribute.
     :type param_attr: ParameterAttribute
@@ -4803,10 +4836,9 @@ def tensor_layer(a,
     :type act: BaseActivation
     :param param_attr: The Parameter Attribute.
     :type param_attr: ParameterAttribute
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: Extra Layer config.
     :type layer_attr: ExtraLayerAttribute | None
@@ -4868,10 +4900,9 @@ def selective_fc_layer(input,
     :type act: BaseActivation
     :param param_attr: The Parameter Attribute.
     :type param_attr: ParameterAttribute
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: Extra Layer config.
     :type layer_attr: ExtraLayerAttribute | None
@@ -5494,7 +5525,11 @@ def crf_decoding_layer(input,
     return LayerOutput(name, LayerType.CRF_DECODING_LAYER, parents, size=1)
 
 
-@wrap_act_default(act=SigmoidActivation())
+"""
+Following are cost Layers.
+"""
+
+
 @wrap_bias_attr_default(has_bias=True)
 @wrap_param_attr_default()
 @wrap_name_default()
@@ -5502,7 +5537,6 @@ def crf_decoding_layer(input,
 def nce_layer(input,
               label,
               num_classes=None,
-              act=None,
               param_attr=None,
               weight=None,
               num_neg_samples=10,
@@ -5511,9 +5545,12 @@ def nce_layer(input,
               bias_attr=None,
               layer_attr=None):
     """
-    Noise-contrastive estimation.
-    Implements the method in the following paper:
-    A fast and simple algorithm for training neural probabilistic language models.
+    Noise-contrastive estimation. This layer implements the method in the
+    following paper:
+
+    Reference:
+        A fast and simple algorithm for training neural probabilistic language
+        models. https://www.cs.toronto.edu/~amnih/papers/ncelm.pdf
 
     The example usage is:
 
@@ -5525,32 +5562,37 @@ def nce_layer(input,
 
     :param name: The name of this layer. It is optional.
     :type name: basestring
-    :param input: The input layers. It could be a LayerOutput of list/tuple of LayerOutput.
+    :param input: The input layers. It should be a LayerOutput or a list/tuple
+                  of LayerOutput.
     :type input: LayerOutput | list | tuple | collections.Sequence
-    :param label: label layer
+    :param label: The ground truth.
     :type label: LayerOutput
-    :param weight: weight layer, can be None(default)
+    :param weight: The weight layer defines a weight for each sample in the
+                   mini-batch. The default value is None.
     :type weight: LayerOutput
-    :param num_classes: number of classes.
+    :param num_classes: The class number.
     :type num_classes: int
-    :param act: Activation type. SigmoidActivation is the default.
-    :type act: BaseActivation
-    :param param_attr: The Parameter Attribute|list.
-    :type param_attr: ParameterAttribute
-    :param num_neg_samples: number of negative samples. Default is 10.
+    :param param_attr: The parameter attributes.
+    :type param_attr: ParameterAttribute|list
+    :param num_neg_samples: The number of sampled negative labels. The default
+                            value is 10.
     :type num_neg_samples: int
-    :param neg_distribution: The distribution for generating the random negative labels.
-                             A uniform distribution will be used if not provided.
-                             If not None, its length must be equal to num_classes.
+    :param neg_distribution: The discrete noisy distribution over the output
+                             space from which num_neg_samples negative labels
+                             are sampled. If this parameter is not set, a
+                             uniform distribution will be used. A user defined
+                             distribution is a list whose length must be equal
+                             to the num_classes. Each member of the list defines
+                             the probability of a class given input x.
     :type neg_distribution: list | tuple | collections.Sequence | None
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The attribute for bias. If this parameter is set False or
+                      any object whose type is not ParameterAttribute, no bias
+                      is added. If this parameter is set True, the bias is
+                      initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param layer_attr: Extra Layer Attribute.
     :type layer_attr: ExtraLayerAttribute
-    :return: layer name.
+    :return: The LayerOutput object.
     :rtype: LayerOutput
     """
     if isinstance(input, LayerOutput):
@@ -5573,8 +5615,6 @@ def nce_layer(input,
         assert isinstance(neg_distribution, collections.Sequence)
         assert len(neg_distribution) == num_classes
         assert abs(sum(neg_distribution) - 1.0) < 1e-5
-    if not isinstance(act, BaseActivation):
-        raise TypeError()
 
     ipts_for_layer = []
     parents = []
@@ -5596,7 +5636,7 @@ def nce_layer(input,
         type=LayerType.NCE_LAYER,
         num_classes=num_classes,
         neg_sampling_dist=neg_distribution,
-        active_type=act.name,
+        active_type=SigmoidActivation().name,
         num_neg_samples=num_neg_samples,
         inputs=ipts_for_layer,
         bias=ParamAttr.to_bias(bias_attr),
@@ -5606,12 +5646,7 @@ def nce_layer(input,
         LayerType.NCE_LAYER,
         parents=parents,
         size=l.config.size,
-        activation=act)
-
-
-"""
-following are cost Layers.
-"""
+        activation=SigmoidActivation())
 
 
 @wrap_name_default()
@@ -5770,20 +5805,21 @@ def cross_entropy(input,
     :param input: The first input layer.
     :type input: LayerOutput.
     :param label: The input label.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param name: The name of this layer. It is optional.
-    :type name: None | basestring.
-    :param coeff: The cost is multiplied with coeff.
-                  The coefficient affects the gradient in the backward.
-    :type coeff: float.
+    :type name: basestring
+    :param coeff: The weight of the gradient in the back propagation.
+                  1.0 is the default.
+    :type coeff: float
     :param weight: The cost of each sample is multiplied with each weight.
                    The weight should be a layer with size=1. Note that gradient
                    will not be calculated for weight.
     :type weight: LayerOutout
-    :param layer_attr: Extra Layer Attribute.
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
-    :rtype: LayerOutput.
+    :rtype: LayerOutput
     """
 
     ipts, parents = __cost_input__(input, label, weight)
@@ -5816,19 +5852,21 @@ def cross_entropy_with_selfnorm(input,
                                           label=label_layer)
 
     :param input: The first input layer.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param label: The input label.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param name: The name of this layer. It is optional.
-    :type name: None | basestring.
-    :param coeff: The coefficient affects the gradient in the backward.
-    :type coeff: float.
+    :type name: basestring
+    :param coeff: The weight of the gradient in the back propagation.
+                  1.0 is the default.
+    :type coeff: float
     :param softmax_selfnorm_alpha: The scale factor affects the cost.
-    :type softmax_selfnorm_alpha: float.
-    :param layer_attr: Extra Layer Attribute.
+    :type softmax_selfnorm_alpha: float
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
-    :rtype: LayerOutput.
+    :rtype: LayerOutput
     """
     Layer(
         name=name,
@@ -5849,7 +5887,7 @@ def cross_entropy_with_selfnorm(input,
 @layer_support()
 def sum_cost(input, name=None, layer_attr=None):
     """
-    A loss layer which calculate the sum of the input as loss
+    A loss layer which calculates the sum of the input as loss.
 
     The example usage is:
 
@@ -5858,10 +5896,11 @@ def sum_cost(input, name=None, layer_attr=None):
        cost = sum_cost(input=input_layer)
 
     :param input: The input of this layer.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param name: The name of this layer. It is optional.
-    :type name: None | basestring.
-    :param layer_attr: Extra Layer Attribute.
+    :type name: basestring
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
     :rtype: LayerOutput.
@@ -5901,16 +5940,18 @@ def huber_regression_cost(input,
        cost = huber_regression_cost(input=input_layer, label=label_layer)
 
     :param input: The first input layer.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param label: The input label.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param name: The name of this layer. It is optional.
-    :type name: None | basestring.
+    :type name: basestring
     :param delta: The difference between the observed and predicted values.
-    :type delta: float.
-    :param coeff: The coefficient affects the gradient in the backward.
-    :type coeff: float.
-    :param layer_attr: Extra Layer Attribute.
+    :type delta: float
+    :param coeff: The weight of the gradient in the back propagation.
+                  1.0 is the default.
+    :type coeff: float
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
     :rtype: LayerOutput.
@@ -5951,17 +5992,19 @@ def huber_classification_cost(input,
        cost = huber_classification_cost(input=input_layer, label=label_layer)
 
     :param input: The first input layer.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param label: The input label.
-    :type input: LayerOutput.
+    :type input: LayerOutput
     :param name: The name of this layer. It is optional.
-    :type name: None | basestring.
-    :param coeff: The coefficient affects the gradient in the backward.
-    :type coeff: float.
-    :param layer_attr: Extra Layer Attribute.
+    :type name: basestring
+    :param coeff: The weight of the gradient in the back propagation.
+                  1.0 is the default.
+    :type coeff: float
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
-    :rtype: LayerOutput.
+    :rtype: LayerOutput
     """
     assert isinstance(input, LayerOutput)
     if input.size is not None:
@@ -5998,10 +6041,12 @@ def multi_binary_label_cross_entropy(input,
     :param label: The input label.
     :type input: LayerOutput
     :param name: The name of this layer. It is optional.
-    :type name: None | basestring
-    :param coeff: The coefficient affects the gradient in the backward.
+    :type name: basestring
+    :param coeff: The weight of the gradient in the back propagation.
+                  1.0 is the default.
     :type coeff: float
-    :param layer_attr: Extra Layer Attribute.
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -6104,7 +6149,7 @@ def cross_entropy_over_beam(input, name=None):
 
     :param input: Input beams for this layer.
     :type input: BeamInput
-    :param name: The name of this layer.
+    :param name: The name of this layer. It is optional.
     :type name: basestring
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -6139,7 +6184,7 @@ def cross_entropy_over_beam(input, name=None):
 def smooth_l1_cost(input, label, name=None, coeff=1.0, layer_attr=None):
     """
     This is a L1 loss but more smooth. It requires that the
-    size of input and label are equal. The formula is as follows,
+    sizes of input and label are equal. The formula is as follows,
 
     .. math::
 
@@ -6151,8 +6196,9 @@ def smooth_l1_cost(input, label, name=None, coeff=1.0, layer_attr=None):
 
         smooth_{L1}(x) = \\begin{cases} 0.5x^2& \\text{if}  \\ |x| < 1 \\\\ |x|-0.5& \\text{otherwise} \end{cases}
 
-    More details can be found by referring to `Fast R-CNN
-    <https://arxiv.org/pdf/1504.08083v2.pdf>`_
+    Reference:
+        Fast R-CNN
+        https://arxiv.org/pdf/1504.08083v2.pdf
 
     The example usage is:
 
@@ -6166,10 +6212,12 @@ def smooth_l1_cost(input, label, name=None, coeff=1.0, layer_attr=None):
     :param label: The input label.
     :type input: LayerOutput
     :param name: The name of this layer. It is optional.
-    :type name: None | basestring
-    :param coeff: The coefficient affects the gradient in the backward.
+    :type name: basestring
+    :param coeff: The weight of the gradient in the back propagation.
+                  1.0 is the default.
     :type coeff: float
-    :param layer_attr: Extra Layer Attribute.
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -6191,12 +6239,12 @@ def smooth_l1_cost(input, label, name=None, coeff=1.0, layer_attr=None):
 @wrap_name_default()
 def multiplex_layer(input, name=None, layer_attr=None):
     """
-    This layer multiplex multiple layers according to the index,
-    which is provided by the first input layer.
-    inputs[0]: the index of the layer to output of size batchSize.
+    This layer multiplex multiple layers according to the indexes,
+    which are provided by the first input layer.
+    inputs[0]: the indexes of the layers to form the output of size batchSize.
     inputs[1:N]; the candidate output data.
-    For each index i from 0 to batchSize -1, the output is the i-th row of the
-    (index[i] + 1)-th layer.
+    For each index i from 0 to batchSize - 1, the i-th row of the output is the
+    the same to the i-th row of the (index[i] + 1)-th layer.
 
     For each i-th row of output:
     .. math::
@@ -6215,7 +6263,8 @@ def multiplex_layer(input, name=None, layer_attr=None):
     :type input: list of LayerOutput
     :param name: The name of this layer. It is optional.
     :type name: basestring
-    :param layer_attr: extra layer attributes.
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute.
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -6319,14 +6368,14 @@ def row_conv_layer(input,
     :type context_len: int
     :param act: Activation Type. LinearActivation is the default.
     :type act: BaseActivation
-    :param param_attr: The Parameter Attribute. If None, the parameter will be
-                       initialized smartly. It's better to set it by yourself.
+    :param param_attr: The parameter attribute. See ParameterAttribute for
+                       details.
     :type param_attr: ParameterAttribute
-    :param layer_attr: Extra Layer config.
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute | None
     :return: LayerOutput object.
     :rtype: LayerOutput
-
     """
     assert isinstance(input, LayerOutput)
     assert context_len > 0, "the context_len must be greatet than 0."
@@ -6351,7 +6400,7 @@ def prelu_layer(input,
                 param_attr=None,
                 layer_attr=None):
     """
-    The Parameter Relu activation that actives outputs with a learnable weight.
+    The Parametric Relu activation that actives outputs with a learnable weight.
 
     Reference:
         Delving Deep into Rectifiers: Surpassing Human-Level Performance on
@@ -6371,16 +6420,17 @@ def prelu_layer(input,
     :type name: basestring
     :param input: The input of this layer.
     :type input: LayerOutput
-    :param partial_sum: this parameter makes a group of inputs share a same weight.
+    :param partial_sum: this parameter makes a group of inputs share the same weight.
 
         - partial_sum = 1, indicates the element-wise activation: each element has a weight.
-        - partial_sum = number of elements in one channel, indicates the channel-wise activation, elements in a channel share a same weight.
-        - partial_sum = number of outputs, indicates all elements share a same weight.
+        - partial_sum = number of elements in one channel, indicates the channel-wise activation, elements in a channel share the same weight.
+        - partial_sum = number of outputs, indicates all elements share the same weight.
 
     :type partial_sum: int
     :param param_attr: The parameter attribute. See ParameterAttribute for details.
-    :type param_attr: ParameterAttribute | None
-    :param layer_attr: Extra layer configurations. Default is None.
+    :type param_attr: ParameterAttribute
+    :param layer_attr: The extra layer attribute. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute | None
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -6436,34 +6486,34 @@ def gated_unit_layer(input,
 
     :param input: The input of this layer.
     :type input: LayerOutput
-    :param size: output size of the gated unit.
+    :param size: The dimension of this layer's output.
     :type size: int
-    :param act: Activation type of the projected input. LinearActivation is the default.
+    :param act: Activation type of the projection. LinearActivation is the default.
     :type act: BaseActivation
     :param name: The name of this layer. It is optional.
     :type name: basestring
-    :param gate_attr: Attributes to tune the gate output, for example, error
-        clipping threshold, dropout and so on. See ExtraLayerAttribute for
-        more details.
+    :param gate_attr: The extra layer attribute of the gate. See ExtraLayerAttribute for
+                      details.
     :type gate_attr: ExtraLayerAttribute | None
-    :param gate_param_attr: Attributes to tune the learnable projected matrix
-        parameter of the gate.
-    :type gate_param_attr: ParameterAttribute | None
-    :param gate_bias_attr: Attributes to tune the learnable bias of the gate.
-    :type gate_bias_attr: ParameterAttribute | None
-    :param inproj_attr: Attributes to the tune the projected input, for
-        example, error clipping threshold, dropout and so on. See
-        ExtraLayerAttribute for more details.
+    :param gate_param_attr: The parameter attribute of the gate. See ParameterAttribute
+                            for details.
+    :type gate_param_attr: ParameterAttribute
+    :param gate_bias_attr: The bias attribute of the gate. If the parameter is set to False or
+                           an object whose type is not ParameterAttribute, no bias is defined.
+                           If the parameter is set to True, the bias is initialized to zero.
+    :type gate_bias_attr: ParameterAttribute | bool | None | Any
+    :param inproj_attr: Extra layer attributes of the projection. See ExtraLayerAttribute for
+                        details.
     :type inproj_attr: ExtraLayerAttribute | None
-    :param inproj_param_attr: Attributes to tune the learnable parameter of
-        the projection of input.
-    :type inproj_param_attr: ParameterAttribute | None
-    :param inproj_bias_attr: Attributes to tune the learnable bias of
-        projection of the input.
-    :type inproj_bias_attr: ParameterAttribute | None
-    :param layer_attr: Attributes to tune the final output of the gated unit,
-        for example, error clipping threshold, dropout and so on. See
-        ExtraLayerAttribute for more details.
+    :param inproj_param_attr: The parameter attribute of the projection. See ParameterAttribute
+                              for details.
+    :type inproj_param_attr: ParameterAttribute
+    :param inproj_bias_attr: The bias attribute of the projection. If the parameter is set to False
+                             or an object whose type is not ParameterAttribute, no bias is defined.
+                             If the parameter is set to True, the bias is initialized to zero.
+    :type inproj_bias_attr: ParameterAttribute | bool | None | Any
+    :param layer_attr: Extra layer attribute of the product. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute | None
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -6659,9 +6709,9 @@ def clip_layer(input, min, max, name=None):
     :param input: The input of this layer.
     :type input: LayerOutput.
     :param min: The lower threshold for clipping.
-    :type min: double
+    :type min: float
     :param max: The upper threshold for clipping.
-    :type max: double
+    :type max: float
     :return: LayerOutput object.
     :rtype: LayerOutput
     """
@@ -6709,7 +6759,6 @@ def seq_slice_layer(input, starts, ends, name=None):
     :type ends: LayerOutput | None
     :return: LayerOutput object.
     :rtype: LayerOutput
-
     """
 
     assert isinstance(input, LayerOutput), (
@@ -6830,20 +6879,21 @@ def img_conv3d_layer(input,
     :param padding: The numbers of padding along three axises. If the parameter is set to
                     one integer, they will be same.
     :type padding: int | tuple | list
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :param num_channels: The number of input channels. If the parameter is not set or
                          set to None,  its actual value will be automatically set to
                          the channels number of the input .
     :type num_channels: int
-    :param param_attr: The parameter attribute of the convolution.
+    :param param_attr: The parameter attribute of the convolution. See ParameterAttribute for
+                       details.
     :type param_attr: ParameterAttribute
     :param shared_biases: Whether biases will be shared between filters or not.
     :type shared_biases: bool
-    :param layer_attr: Extra layer attributes.
+    :param layer_attr: The extra layer attributes. See ExtraLayerAttribute for
+                       details.
     :type layer_attr: ExtraLayerAttribute
     :param trans: True if it is a convTransLayer, False if it is a convLayer
     :type trans: bool
@@ -6950,12 +7000,12 @@ def scale_shift_layer(input, name=None, param_attr=None, bias_attr=None):
     :type name: basestring
     :param input: The input of this layer.
     :type input: LayerOutput
-    :param param_attr: The parameter attribute of scaling.
+    :param param_attr: The parameter attribute of scaling. See ParameterAttribute for
+                      details.
     :type param_attr: ParameterAttribute
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -7013,10 +7063,9 @@ def sub_seq_layer(input, offsets, sizes, act=None, bias_attr=None, name=None):
     :type sizes: LayerOutput
     :param act: Activation type, LinearActivation is the default.
     :type act: BaseActivation.
-    :param bias_attr: The Bias Attribute. If the parameter is set to
-                      False or something not type of ParameterAttribute,
-                      no bias is defined. If the parameter is set to
-                      True, the bias is initialized to zero.
+    :param bias_attr: The bias attribute. If the parameter is set to False or an object
+                      whose type is not ParameterAttribute, no bias is defined. If the
+                      parameter is set to True, the bias is initialized to zero.
     :type bias_attr: ParameterAttribute | None | bool | Any
     :return: LayerOutput object.
     :rtype: LayerOutput
@@ -7042,3 +7091,54 @@ def sub_seq_layer(input, offsets, sizes, act=None, bias_attr=None, name=None):
         LayerType.SUB_SEQ_LAYER,
         parents=[input, offsets, sizes],
         size=input.size)
+
+
+@wrap_name_default('scale_sub_region')
+def scale_sub_region_layer(input, indices, value, name=None):
+    """
+    Given an image or feature map with CHW information, scale_sub_region_layer
+    can be used to multiply a real value to values of a sub continuous region.
+    You can provide start and end indices of CHW for each instance.
+    Please notice that all start indices are counting from 1.
+    The shape of indices should be [batch_size, 6] and the layout for each row
+    is [C_Start, C_End, H_Start, H_End, W_Start, W_End].
+
+    .. code-block:: python
+
+        scale_sub_region = scale_sub_region_layer(input=input,
+                                                  indices=indices,
+                                                  value=value)
+
+    :param name: The name of this layer. It is optional.
+    :type name: basestring
+    :param input: The input of this layer which should contains CHW information.
+    :type input: LayerOutput
+    :param indices: Start index and end index for C H W, the input value should
+                    be a 2-D matrix with shape [batch_size, 6].
+    :type indices: LayerOutput.
+    :param value: value to multiply.
+    :type value: float
+    :return: LayerOutput object.
+    :rtype: LayerOutput
+    """
+
+    assert isinstance(input, LayerOutput), (
+        'The first input of scale_sub_region_layer, '
+        'must be a PaddlePaddle layer.')
+    assert isinstance(indices, LayerOutput), (
+        'The start and end indices for CHW, must be a PaddlePaddle layer.')
+    assert isinstance(value, float), (
+        'The value to multiply, must be a real value.')
+
+    Layer(
+        name=name,
+        type=LayerType.SCALE_SUB_REGION_LAYER,
+        inputs=[input.name, indices.name],
+        value=value)
+
+    return LayerOutput(
+        name,
+        LayerType.SCALE_SUB_REGION_LAYER,
+        parents=[input, indices],
+        num_filters=input.num_filters,
+        size=input.size)

python/paddle/trainer_config_helpers/tests/configs/file_list.sh

@@ -9,7 +9,7 @@ test_seq_concat_reshape test_pad test_smooth_l1 test_multiplex_layer
 test_prelu_layer test_row_conv test_detection_output_layer test_multibox_loss_layer
 test_recursive_topology test_gated_unit_layer test_clip_layer test_row_l2_norm_layer
 test_kmax_seq_socre_layer test_sub_nested_seq_select_layer test_scale_shift_layer
-test_seq_slice_layer test_cross_entropy_over_beam test_pooling3D_layer
-test_conv3d_layer test_deconv3d_layer test_BatchNorm3D test_resize_layer)
+test_seq_slice_layer test_cross_entropy_over_beam test_roi_pool_layer test_pooling3D_layer
+test_conv3d_layer test_deconv3d_layer test_BatchNorm3D test_resize_layer test_scale_sub_region_layer)
 
 export whole_configs=(test_split_datasource)

python/paddle/trainer_config_helpers/tests/configs/protostr/test_roi_pool_layer.protostr

+type: "nn"
+layers {
+  name: "data"
+  type: "data"
+  size: 588
+  active_type: ""
+  height: 14
+  width: 14
+}
+layers {
+  name: "rois"
+  type: "data"
+  size: 10
+  active_type: ""
+}
+layers {
+  name: "__conv_0__"
+  type: "exconv"
+  size: 3136
+  active_type: ""
+  inputs {
+    input_layer_name: "data"
+    input_parameter_name: "___conv_0__.w0"
+    conv_conf {
+      filter_size: 3
+      channels: 3
+      stride: 1
+      padding: 1
+      groups: 1
+      filter_channels: 3
+      output_x: 14
+      img_size: 14
+      caffe_mode: true
+      filter_size_y: 3
+      padding_y: 1
+      stride_y: 1
+      output_y: 14
+      img_size_y: 14
+    }
+  }
+  bias_parameter_name: "___conv_0__.wbias"
+  num_filters: 16
+  shared_biases: true
+  height: 14
+  width: 14
+}
+layers {
+  name: "__roi_pool_0__"
+  type: "roi_pool"
+  size: 784
+  active_type: ""
+  inputs {
+    input_layer_name: "__conv_0__"
+    roi_pool_conf {
+      pooled_width: 7
+      pooled_height: 7
+      spatial_scale: 0.0625
+    }
+  }
+  inputs {
+    input_layer_name: "rois"
+  }
+  height: 7
+  width: 7
+}
+parameters {
+  name: "___conv_0__.w0"
+  size: 432
+  initial_mean: 0.0
+  initial_std: 0.272165526976
+  initial_strategy: 0
+  initial_smart: false
+}
+parameters {
+  name: "___conv_0__.wbias"
+  size: 16
+  initial_mean: 0.0
+  initial_std: 0.0
+  dims: 16
+  dims: 1
+  initial_strategy: 0
+  initial_smart: false
+}
+input_layer_names: "data"
+input_layer_names: "rois"
+output_layer_names: "__roi_pool_0__"
+sub_models {
+  name: "root"
+  layer_names: "data"
+  layer_names: "rois"
+  layer_names: "__conv_0__"
+  layer_names: "__roi_pool_0__"
+  input_layer_names: "data"
+  input_layer_names: "rois"
+  output_layer_names: "__roi_pool_0__"
+  is_recurrent_layer_group: false
+}
+

python/paddle/trainer_config_helpers/tests/configs/protostr/test_scale_sub_region_layer.protostr

+type: "nn"
+layers {
+  name: "data"
+  type: "data"
+  size: 2016
+  active_type: ""
+  height: 48
+  width: 42
+}
+layers {
+  name: "indices"
+  type: "data"
+  size: 6
+  active_type: ""
+}
+layers {
+  name: "__scale_sub_region_0__"
+  type: "scale_sub_region"
+  size: 2016
+  active_type: ""
+  inputs {
+    input_layer_name: "data"
+    scale_sub_region_conf {
+      image_conf {
+        channels: 1
+        img_size: 42
+        img_size_y: 48
+      }
+      value: 0.0
+    }
+  }
+  inputs {
+    input_layer_name: "indices"
+  }
+  height: 48
+  width: 42
+}
+input_layer_names: "data"
+input_layer_names: "indices"
+output_layer_names: "__scale_sub_region_0__"
+sub_models {
+  name: "root"
+  layer_names: "data"
+  layer_names: "indices"
+  layer_names: "__scale_sub_region_0__"
+  input_layer_names: "data"
+  input_layer_names: "indices"
+  output_layer_names: "__scale_sub_region_0__"
+  is_recurrent_layer_group: false
+}
+

python/paddle/trainer_config_helpers/tests/configs/test_roi_pool_layer.py

+from paddle.trainer_config_helpers import *
+
+data = data_layer(name='data', size=3 * 14 * 14, height=14, width=14)
+
+rois = data_layer(name='rois', size=10)
+
+conv = img_conv_layer(
+    input=data,
+    filter_size=3,
+    num_channels=3,
+    num_filters=16,
+    padding=1,
+    act=LinearActivation(),
+    bias_attr=True)
+
+roi_pool = roi_pool_layer(
+    input=conv,
+    rois=rois,
+    pooled_width=7,
+    pooled_height=7,
+    spatial_scale=1. / 16)
+
+outputs(roi_pool)

python/paddle/trainer_config_helpers/tests/configs/test_scale_sub_region_layer.py

+from paddle.trainer_config_helpers import *
+
+settings(batch_size=1000, learning_rate=1e-5)
+
+data = data_layer(name='data', size=2016, height=48, width=42)
+indices = data_layer(name='indices', size=6)
+
+scale_sub_region = scale_sub_region_layer(
+    input=data, indices=indices, value=0.0)
+
+outputs(scale_sub_region)

python/paddle/v2/framework/framework.py

@@ -285,7 +285,7 @@ class Operator(object):
         self.desc.check_attrs()
         no_kernel_op_set = {
             'feed', 'fetch', 'save', 'load', 'recurrent',
-            'rnn_memory_helper_grad'
+            'rnn_memory_helper_grad', 'while'
         }
         if type not in no_kernel_op_set:
             self.desc.infer_var_type(self.block.desc)

python/paddle/v2/framework/layers.py

@@ -22,12 +22,36 @@ def fc(input,
        num_flatten_dims=1,
        main_program=None,
        startup_program=None):
-    # create helper
+    """
+    Fully Connected Layer.
+
+    Args:
+       input: The input tensor to the function
+       size: The size of the layer
+       param_attr: The parameters/weights to the FC Layer
+       bias_attr: The bias parameter for the FC layer
+       name: Name/alias of the function
+       act: Activation to be applied to the output of FC layer
+       num_flatten_dims: Number of columns in input
+       main_program: Name of the main program that calls this
+       startup_program: Name of the startup program
+
+    This function can take in multiple inputs and performs the Fully Connected
+    function (linear transformation) on top of each of them.
+    So for input x, the output will be : Wx + b. Where W is the parameter,
+    b the bias and x is the input.
+
+    The function also applies an activation (non-linearity) on top of the
+    output, if activation is passed in the input.
+
+    All the input variables of this function are passed in as local variables
+    to the LayerHelper constructor.
+
+    """
     helper = LayerHelper('fc', **locals())
 
     dtype = helper.input_dtype()
 
-    # mul
     mul_results = []
     for input_var, param_attr in helper.iter_inputs_and_params():
         input_shape = input_var.shape
@@ -68,6 +92,26 @@ def embedding(input,
               param_attr=None,
               main_program=None,
               startup_program=None):
+    """
+    Embedding Layer.
+
+    Args:
+       input: The input to the function
+       size: The size of the layer
+       data_type: The type of data : float32, float_16, int etc
+       is_sparse: A flag that decleares whether the input is sparse
+       param_attr: Parameters for this layer
+       main_program: Name of the main program that calls this
+       startup_program: Name of the startup program
+
+    This function can take in the input (which is a vector of IDs) and
+    performs a lookup in the lookup_table using these IDs, to result into
+    the embedding of each ID in the input.
+
+    All the input variables of this function are passed in as local variables
+    to the LayerHelper constructor.
+
+    """
     helper = LayerHelper('embedding', **locals())
     w = helper.create_parameter(
         attr=helper.param_attr, shape=size, dtype=data_type)
@@ -87,7 +131,30 @@ def data(name,
          type=core.VarDesc.VarType.LOD_TENSOR,
          append_batch_size=True,
          main_program=None,
-         startup_program=None):
+         startup_program=None,
+         stop_gradient=True):
+    """
+    Data Layer.
+
+    Args:
+       name: The name/alias of the function
+       shape: Tuple declaring the shape.
+       data_type: The type of data : float32, float_16, int etc
+       type: The output type. By default it is LOD_TENSOR.
+       append_batch_size: Whether or not to append the data as a batch.
+       main_program: Name of the main program that calls this
+       startup_program: Name of the startup program
+       stop_gradient: A boolean that mentions whether gradient should flow.
+
+    This function takes in input and based on whether data has
+    to be returned back as a minibatch, it creates the global variable using
+    the helper functions. The global variables can be accessed by all the
+    following operations and layers in the graph.
+
+    All the input variables of this function are passed in as local variables
+    to the LayerHelper constructor.
+
+    """
     helper = LayerHelper('data', **locals())
     shape = list(shape)
     for i in xrange(len(shape)):
@@ -101,15 +168,40 @@ def data(name,
         shape = [-1] + shape  # append batch size as -1
 
     return helper.create_global_variable(
-        name=name, shape=shape, dtype=data_type, type=type, stop_gradient=True)
+        name=name,
+        shape=shape,
+        dtype=data_type,
+        type=type,
+        stop_gradient=stop_gradient)
 
 
 def _convert_(name):
+    """
+    Formatting.
+
+    Args:
+       name: The name/alias
+
+    This function takes in a name and converts it to a standard format of
+    group1_group2. Where as per the regular expression, group1 can have
+    alphabets and numbers and group2 has capital alphabets.
+
+    """
     s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
     return re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower()
 
 
 def _create_op_func_(op_type):
+    """
+    Create an Operator for a Function.
+
+    Args:
+       op_type: The name of the operator to be created
+
+    This function takes in the operator type (sigmoid, mean , average etc) and
+    creates the operator functionality.
+
+    """
     op_proto = OpProtoHolder.instance().get_op_proto(op_type)
     not_intermediate_outputs = \
         filter(lambda output: not output.intermediate, op_proto.outputs)
@@ -117,26 +209,26 @@ def _create_op_func_(op_type):
         filter(lambda output: output.intermediate, op_proto.outputs)
 
     if len(not_intermediate_outputs) != 1:
-        raise ValueError(
-            "Only one not intermediate output operator can be automatically generated"
-        )
+        raise ValueError("Only one non intermediate output operator can be",
+                         "automatically generated")
 
     if not_intermediate_outputs[0].duplicable:
         raise ValueError(
-            "Only not duplicable op can be automatically generated")
+            "Only non duplicable op can be automatically generated")
 
     for output in intermediate_outputs:
         if output.duplicable:
-            raise ValueError(
-                "Only when all intermediate ops are not duplicable, "
-                "this op can be automatically generated")
+            raise ValueError("The op can be automatically generated only when ",
+                             "all intermediate ops are not duplicable")
 
     o_name = not_intermediate_outputs[0].name
     intermediate_output_names = [output.name for output in intermediate_outputs]
 
-    def func(**kwargs):
-        helper = LayerHelper(op_type, **kwargs)
-        inputs = dict()
+    def infer_and_check_data_type(op_proto, **kwargs):
+        """
+        This function performs the sanity check for data_type and
+        instance type.
+        """
         dtype = None
         for ipt in op_proto.inputs:
             name = _convert_(ipt.name)
@@ -153,6 +245,25 @@ def _create_op_func_(op_type):
                 elif dtype != each.data_type:
                     raise ValueError(
                         "operator {0} must input same dtype".format(op_type))
+
+        return dtype
+
+    def func(**kwargs):
+        """
+        This function implements the function for the operator. This process
+        involves doing the sanity check (using the function above), reading
+        inputs from protobuf and applying the activations on top.
+        """
+        helper = LayerHelper(op_type, **kwargs)
+
+        dtype = infer_and_check_data_type(op_proto, **kwargs)
+
+        inputs = dict()
+        for ipt in op_proto.inputs:
+            name = _convert_(ipt.name)
+            val = kwargs.pop(name, [])
+            if not isinstance(val, list) and not isinstance(val, tuple):
+                val = [val]
             inputs[ipt.name] = val
 
         outputs = dict()
@@ -178,9 +289,32 @@ _create_op_func_('reshape')
 _create_op_func_('elementwise_add')
 _create_op_func_('sigmoid')
 _create_op_func_('scale')
+_create_op_func_('reshape')
+_create_op_func_('transpose')
+
+
+def fill_constant(data_type, shape, value=None, program=None):
+    """
+    This function creates a tensor , with shape as mentioned in the input and
+    specified data_type and fills this up with a constant value that
+    comes in the input.
+    """
+    helper = LayerHelper('fill_constant', **locals())
+    out = helper.create_tmp_variable(dtype=data_type)
+    helper.append_op(
+        type='fill_constant',
+        outputs={'Out': [out]},
+        attrs={'data_type': data_type,
+               'shape': shape,
+               'value': value})
+    return out
 
 
 def cast(x, data_type, main_program=None):
+    """
+    This function takes in the input with input_data_type
+    and casts it to the output_data_type as the output.
+    """
     helper = LayerHelper('cast', **locals())
     out = helper.create_tmp_variable(dtype=data_type)
     helper.append_op(
@@ -193,6 +327,10 @@ def cast(x, data_type, main_program=None):
 
 
 def concat(input, axis, main_program=None, startup_program=None):
+    """
+    This function concats the input along the axis mentioned
+    and returns that as the output.
+    """
     helper = LayerHelper('concat', **locals())
     out = helper.create_tmp_variable(dtype=helper.input_dtype())
     helper.append_op(
@@ -204,6 +342,10 @@ def concat(input, axis, main_program=None, startup_program=None):
 
 
 def sums(input, main_program=None, startup_program=None):
+    """
+    This function takes in the input and performs the sum operation on it
+    and returns that as the output.
+    """
     helper = LayerHelper('sum', **locals())
     out = helper.create_tmp_variable(dtype=helper.input_dtype())
     helper.append_op(type='sum', inputs={'X': input}, outputs={'Out': out})
@@ -211,6 +353,10 @@ def sums(input, main_program=None, startup_program=None):
 
 
 def cos_sim(X, Y, **kwargs):
+    """
+    This function performs the cosine similarity between two tensors
+    X and Y and returns that as the output.
+    """
     helper = LayerHelper('cos_sim', **kwargs)
     out = helper.create_tmp_variable(dtype=X.data_type)
     xnorm = helper.create_tmp_variable(dtype=X.data_type)
@@ -226,6 +372,9 @@ def cos_sim(X, Y, **kwargs):
 
 
 def cross_entropy(input, label, **kwargs):
+    """
+    This function computes cross_entropy using the input and label.
+    """
     helper = LayerHelper('cross_entropy', **kwargs)
     out = helper.create_tmp_variable(dtype=input.data_type)
     helper.append_op(
@@ -238,6 +387,10 @@ def cross_entropy(input, label, **kwargs):
 
 
 def square_error_cost(input, label, **kwargs):
+    """
+    This functions returns the squared error cost using the input and label.
+    The output is appending the op to do the above.
+    """
     helper = LayerHelper('square_error_cost', **kwargs)
     minus_out = helper.create_tmp_variable(dtype=input.data_type)
     helper.append_op(
@@ -253,6 +406,10 @@ def square_error_cost(input, label, **kwargs):
 
 
 def accuracy(input, label, k=1, **kwargs):
+    """
+    This function computes the accuracy using the input and label.
+    The output is the top_k inputs and their indices.
+    """
     helper = LayerHelper("accuracy", **kwargs)
     topk_out = helper.create_tmp_variable(dtype=input.data_type)
     topk_indices = helper.create_tmp_variable(dtype="int64")
@@ -285,6 +442,11 @@ def sequence_conv(input,
                   param_attr=None,
                   main_program=None,
                   startup_program=None):
+    """
+    This function creates the op for sequence_conv, using the inputs and
+    other convolutional configurations for the filters and stride as given
+    in the input parameters to the function.
+    """
     # FIXME(dzh) : want to unify the argument of python layer
     # function. So we ignore some unecessary attributes.
     # such as, padding_trainable, context_start.
@@ -325,6 +487,13 @@ def conv2d(input,
            param_attr=None,
            main_program=None,
            startup_program=None):
+    """
+    This function creates the op for a 2-dimensional Convolution.
+    This is performed using the parameters of filters(size, dimensionality etc)
+    , stride and other configurations for a Convolution operation.
+    This funciton can also append an activation on top of the
+    conv-2d output, if mentioned in the input parameters.
+    """
     helper = LayerHelper('conv2d', **locals())
     dtype = helper.input_dtype()
 
@@ -371,6 +540,11 @@ def conv2d(input,
 
 
 def sequence_pool(input, pool_type, **kwargs):
+    """
+    This function add the operator for sequence pooling.
+    This is applied on top of the input using pool_type mentioned
+    in the parameters.
+    """
     helper = LayerHelper('sequence_pool', input=input, **kwargs)
     dtype = helper.input_dtype()
     pool_out = helper.create_tmp_variable(dtype)
@@ -394,6 +568,10 @@ def pool2d(input,
            global_pooling=False,
            main_program=None,
            startup_program=None):
+    """
+    This function adds the operator for pooling in 2 dimensions, using the
+    pooling configurations mentioned in input parameters.
+    """
     if pool_type not in ["max", "avg"]:
         raise ValueError(
             "Unknown pool_type: '%s'. It can only be 'max' or 'avg'.",
@@ -414,9 +592,9 @@ def pool2d(input,
         inputs={"X": input},
         outputs={"Out": pool_out},
         attrs={
-            "poolingType": pool_type,
+            "pooling_type": pool_type,
             "ksize": pool_size,
-            "globalPooling": global_pooling,
+            "global_pooling": global_pooling,
             "strides": pool_stride,
             "paddings": pool_padding
         })
@@ -434,6 +612,10 @@ def batch_norm(input,
                data_layout='NCHW',
                main_program=None,
                startup_program=None):
+    """
+    This function helps create an operator to implement
+    the BatchNorm layer using the configurations from the input parameters.
+    """
     helper = LayerHelper('batch_norm', **locals())
     dtype = helper.input_dtype()
 
@@ -505,8 +687,10 @@ def batch_norm(input,
 
 class BlockGuard(object):
     """
-    BlockGuard used to create sub-block in program by using Python `with` 
-    keyword.
+    BlockGuard class.
+
+    BlockGuard class is used to create a sub-block in a program by
+    using the Python `with` keyword.
     """
 
     def __init__(self, main_program):
@@ -525,9 +709,15 @@ class BlockGuard(object):
 
 
 class StaticRNNGuard(BlockGuard):
+    """
+    StaticRNNGuard class.
+
+    StaticRNNGuard class is used to create a StaticRNN block in a program.
+    """
+
     def __init__(self, rnn):
         if not isinstance(rnn, StaticRNN):
-            raise TypeError("StaticRNNGuard takes an StaticRNN")
+            raise TypeError("StaticRNNGuard takes a StaticRNN")
         super(StaticRNNGuard, self).__init__(rnn.helper.main_program)
         self.rnn = rnn
 
@@ -545,12 +735,18 @@ class StaticRNNGuard(BlockGuard):
 
 class StaticRNNMemoryLink(object):
     """
-    :param init: the initial variable for Memory
-    :type init: Variable
-    :param pre_mem: the memory variable in previous time step
-    :type pre_mem: Variable
-    :param mem: the memory variable in current time step
-    :type mem: Variable
+    StaticRNNMemoryLink class.
+
+    Args:
+        init: the initial variable for Memory
+        init: Variable
+        pre_mem: the memory variable in previous time step
+        pre_mem: Variable
+        mem: the memory variable in current time step
+        mem: Variable
+
+    StaticRNNMemoryLink class is used to create a link between two
+    memory cells of a StaticRNN.
     """
 
     def __init__(self, init, pre_mem, mem=None):
@@ -560,6 +756,12 @@ class StaticRNNMemoryLink(object):
 
 
 class StaticRNN(object):
+    """
+    StaticRNN class.
+
+    StaticRNN class is used to create a StaticRNN. The RNN will have its
+    own parameters like inputs, outputs, memories, status and length.
+    """
     BEFORE_RNN_BLOCK = 0
     IN_RNN_BLOCK = 1
     AFTER_RNN_BLOCK = 2
@@ -588,15 +790,15 @@ class StaticRNN(object):
                init_value=0.0,
                init_batch_dim_idx=0,
                ref_batch_dim_idx=1):
-        '''
-        :param init: boot memory, if not set, a shape, batch_ref must be provided
-        :param shape: shape of the boot memory
-        :param batch_ref: batch size reference variable
-        :param init_value: the init value of boot memory
-        :param init_batch_dim_idx: the index of batch size in init's dimension
-        :param ref_batch_dim_idx: the index of batch size in batch_ref's dimension
-        :return: boot memory
-        '''
+        """
+        Args:
+            init: boot memory, if not set, a shape, batch_ref must be provided
+            shape: shape of the boot memory
+            batch_ref: batch size reference variable
+            init_value: the init value of boot memory
+            init_batch_dim_idx: the index of batch size in init's dimension
+            ref_batch_dim_idx: the index of batch size in batch_ref's dimension
+        """
         self._assert_in_rnn_block_('memory')
         if init is None:
             if shape is None or batch_ref is None:
@@ -762,7 +964,131 @@ class StaticRNN(object):
             })
 
 
+class WhileGuard(BlockGuard):
+    def __init__(self, while_op):
+        if not isinstance(while_op, While):
+            raise TypeError("WhileGuard takes a while op")
+        super(WhileGuard, self).__init__(while_op.helper.main_program)
+        self.while_op = while_op
+
+    def __enter__(self):
+        self.while_op.status = While.IN_WHILE_BLOCK
+        return super(WhileGuard, self).__enter__()
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        if exc_type is not None:
+            return False
+        self.while_op.status = While.AFTER_WHILE_BLOCK
+        self.while_op.complete()
+        return super(WhileGuard, self).__exit__(exc_type, exc_val, exc_tb)
+
+
+class While(object):
+    BEFORE_WHILE_BLOCK = 0
+    IN_WHILE_BLOCK = 1
+    AFTER_WHILE_BLOCK = 2
+
+    def __init__(self, cond, name=None, main_program=None):
+        self.helper = LayerHelper("while", name=name, main_program=main_program)
+        self.status = While.BEFORE_WHILE_BLOCK
+        if not isinstance(cond, Variable):
+            raise TypeError("condition should be a variable")
+        assert isinstance(cond, Variable)
+        if cond.data_type != core.DataType.BOOL:
+            raise TypeError("condition should be a bool variable")
+        if reduce(lambda a, b: a * b, cond.shape, 1) != 1:
+            raise TypeError("condition should be a bool scalar")
+        self.cond_var = cond
+
+    def block(self):
+        return WhileGuard(self)
+
+    def complete(self):
+        main_program = self.helper.main_program
+        while_block = main_program.current_block()
+        parent_block = main_program.block(main_program.current_block()
+                                          .parent_idx)
+
+        inner_outputs = {self.cond_var.name}
+        x_name_list = set()
+        for op in while_block.ops:
+            for iname in op.input_names:
+                for in_var_name in op.input(iname):
+                    if in_var_name not in inner_outputs:
+                        x_name_list.add(in_var_name)
+
+            for oname in op.output_names:
+                for out_var_name in op.output(oname):
+                    inner_outputs.add(out_var_name)
+
+        out_vars = []
+        for inner_out_name in inner_outputs:
+            if inner_out_name in parent_block.vars:
+                out_vars.append(parent_block.var(inner_out_name))
+
+        step_scope = parent_block.create_var(
+            type=core.VarDesc.VarType.STEP_SCOPES)
+
+        parent_block.append_op(
+            type='while',
+            inputs={
+                'X': [parent_block.var(x_name) for x_name in x_name_list],
+                'Condition': [self.cond_var]
+            },
+            outputs={'Out': out_vars,
+                     'StepScopes': [step_scope]},
+            attrs={'step_block': while_block})
+
+
+def lstm(x,
+         c_pre_init,
+         hidden_dim,
+         forget_bias=None,
+         main_program=None,
+         startup_program=None):
+    """
+    This function helps create an operator for the LSTM (Long Short Term
+    Memory) cell that can be used inside an RNN.
+    """
+    helper = LayerHelper('lstm_unit', **locals())
+    rnn = StaticRNN()
+    with rnn.step():
+        c_pre = rnn.memory(init=c_pre_init)
+        x_t = rnn.step_input(x)
+
+        before_fc = concat(
+            input=[x_t, c_pre],
+            axis=1,
+            main_program=main_program,
+            startup_program=startup_program)
+        after_fc = fc(input=before_fc,
+                      size=hidden_dim * 4,
+                      main_program=main_program,
+                      startup_program=startup_program)
+
+        data_type = x.data_type
+        c = helper.create_tmp_variable(data_type)
+        h = helper.create_tmp_variable(data_type)
+
+        helper.append_op(
+            type='lstm_unit',
+            inputs={"X": after_fc,
+                    "C_prev": c_pre},
+            outputs={"C": c,
+                     "H": h},
+            attrs={"forget_bias": forget_bias})
+
+        rnn.update_memory(c_pre, c)
+        rnn.output(h)
+
+    return rnn()
+
+
 def lod_rank_table(x, level=0, main_program=None):
+    """
+    This function creates an operator for creating a LOD_RANK_TABLE
+    using the input x.
+    """
     helper = LayerHelper("lod_rank_table", **locals())
     table = helper.create_variable(
         type=core.VarDesc.VarType.LOD_RANK_TABLE,
@@ -776,10 +1102,15 @@ def lod_rank_table(x, level=0, main_program=None):
 
 
 def lod_tensor_to_array(x, table, main_program=None):
+    """
+    This function creates an operator to convert an LOD_Tensor to
+    an array.
+    """
     helper = LayerHelper("lod_tensor_to_array", **locals())
     array = helper.create_variable(
         name=unique_name("lod_tensor_to_array"),
-        type=core.VarDesc.VarType.LOD_TENSOR_ARRAY)
+        type=core.VarDesc.VarType.LOD_TENSOR_ARRAY,
+        dtype=x.data_type)
     helper.append_op(
         type='lod_tensor_to_array',
         inputs={'X': x,
@@ -789,6 +1120,10 @@ def lod_tensor_to_array(x, table, main_program=None):
 
 
 def array_to_lod_tensor(x, table, main_program=None):
+    """
+    This function creates an operator to convert an array to a
+    LOD_Tensor.
+    """
     helper = LayerHelper("array_to_lod_tensor", **locals())
     tmp = helper.create_tmp_variable(dtype=x.data_type)
     helper.append_op(
@@ -800,7 +1135,12 @@ def array_to_lod_tensor(x, table, main_program=None):
 
 
 def fill_constant(shape, dtype, value, main_program=None):
-    helper = LayerHelper("ones", **locals())
+    """
+    This function creates a tensor , with shape as mentioned in the input and
+    specified data_type and fills this up with a constant value that
+    comes in the input. It also sets the stop_gradient to be True.
+    """
+    helper = LayerHelper("fill_constant", **locals())
     out = helper.create_tmp_variable(dtype=dtype)
     helper.append_op(
         type='fill_constant',
@@ -816,25 +1156,45 @@ def fill_constant(shape, dtype, value, main_program=None):
 
 
 def ones(shape, dtype, main_program=None):
+    """
+    This function performs the same function as fill_constant() declared above
+    with the constant value being 1.0.
+    """
     return fill_constant(value=1.0, **locals())
 
 
 def zeros(shape, dtype, main_program=None):
+    """
+    This function performs the same function as fill_constant() declared above
+    with the constant value being 0.0.
+    """
     return fill_constant(value=0.0, **locals())
 
 
-def increment(x, value=1.0, main_program=None):
+def increment(x, value=1.0, in_place=True, main_program=None):
+    """
+    This function creates an operator to increment each value in the input
+    `x` by an amount: `value` as mentioned in the input parameter. This
+    operation is performed in-place by default.
+    """
     helper = LayerHelper("increment", **locals())
-    tmp = helper.create_tmp_variable(dtype=x.data_type)
+    if not in_place:
+        out = helper.create_tmp_variable(dtype=x.data_type)
+    else:
+        out = x
     helper.append_op(
         type='increment',
         inputs={'X': [x]},
-        outputs={'Out': [tmp]},
+        outputs={'Out': [out]},
         attrs={'step': value})
-    return tmp
+    return out
 
 
 def array_write(x, i, array=None, main_program=None):
+    """
+    This function creates an operator to write the data out as a
+    LOD_TENSOR_ARRAY.
+    """
     helper = LayerHelper('array_write', **locals())
     if array is None:
         array = helper.create_variable(
@@ -849,7 +1209,31 @@ def array_write(x, i, array=None, main_program=None):
     return array
 
 
+def create_array(dtype, main_program=None):
+    helper = LayerHelper("array", **locals())
+    return helper.create_variable(
+        name="{0}.out".format(helper.name),
+        type=core.VarDesc.VarType.LOD_TENSOR_ARRAY,
+        dtype=dtype)
+
+
+def less_than(x, y, cond=None, main_program=None):
+    helper = LayerHelper("less_than", **locals())
+    if cond is None:
+        cond = helper.create_tmp_variable(dtype='bool')
+        cond.stop_gradient = True
+
+    helper.append_op(
+        type='less_than', inputs={'X': [x],
+                                  'Y': [y]}, outputs={'Out': [cond]})
+    return cond
+
+
 def array_read(array, i, main_program=None):
+    """
+    This function creates an operator to read the data in as a
+    LOD_TENSOR_ARRAY.
+    """
     helper = LayerHelper('array_read', **locals())
     if not isinstance(
             array,
@@ -862,3 +1246,33 @@ def array_read(array, i, main_program=None):
                 'I': [i]},
         outputs={'Out': [out]})
     return out
+
+
+def shrink_memory(x, i, table, main_program=None):
+    """
+    This function creates an operator to shrink_rnn_memory using the RankTable
+    as mentioned in the input parameter.
+    """
+    helper = LayerHelper('shrink_memory', **locals())
+    out = helper.create_tmp_variable(dtype=x.data_type)
+    helper.append_op(
+        type='shrink_rnn_memory',
+        inputs={'X': [x],
+                'I': [i],
+                'RankTable': [table]},
+        outputs={'Out': [out]},
+        attrs={})
+    return out
+
+
+def array_length(array, main_program=None):
+    """
+    This function creates an operator to find the length of the
+    LOD_TENSOR_ARRAY.
+    """
+    helper = LayerHelper('array_length', **locals())
+    tmp = helper.create_tmp_variable(dtype='int64')
+    tmp.stop_gradient = True
+    helper.append_op(
+        type='lod_array_length', inputs={'X': [array]}, outputs={'Out': [tmp]})
+    return tmp

python/paddle/v2/framework/optimizer.py

@@ -35,15 +35,21 @@ class Optimizer(object):
         """
         raise NotImplementedError()
 
-    def _initialize_tensors(self, block):
-        """Create all necessary tensors, that will be shared for all parameter updates.
-
-        Tensors like learning rate should be initialized here.
-
-        Args:
-            block: the block in which the loss variable is present
-        """
-        pass
+    def _create_param_lr(self, param_and_grad):
+        # create learning rate variable for every parameter
+        param = param_and_grad[0]
+        param_lr = param.optimize_attr['learning_rate']
+        param_lr_shape = [1]
+        param_lr_var = self.helper.create_global_variable(
+            name=unique_name("learning_rate"),
+            dtype='float32',
+            shape=param_lr_shape,
+            lod_level=1,
+            persistable=True)
+        param_lr = param_lr * self._learning_rate
+        self.helper.set_variable_initializer(
+            var=param_lr_var, initializer=ConstantInitializer(param_lr))
+        return param_lr_var
 
     def _create_accumulators(self, block, parameters):
         """Create all accumulators needed by the parameters
@@ -161,8 +167,6 @@ class Optimizer(object):
             startup_program=startup_program)
         self._create_accumulators(loss.block,
                                   [p[0] for p in parameters_and_grads])
-        # Create any necessary tensors
-        self._initialize_tensors(loss.block)
 
         optimize_ops = []
         for param_and_grad in parameters_and_grads:
@@ -214,27 +218,16 @@ class SGDOptimizer(Optimizer):
         self.type = "sgd"
         self._learning_rate = learning_rate
 
-    def _initialize_tensors(self, block):
-        lr_shape = [1]
-        # create a variable for learning_rate
-        self._lr = self.helper.create_global_variable(
-            name=unique_name("learning_rate"),
-            dtype='float32',
-            shape=lr_shape,
-            lod_level=1,
-            persistable=True)
-        self.helper.set_variable_initializer(
-            var=self._lr, initializer=ConstantInitializer(self._learning_rate))
-
     def _append_optimize_op(self, block, param_and_grad):
         assert isinstance(block, framework.Block)
+
         # create the optimize op
         sgd_op = block.append_op(
             type=self.type,
             inputs={
                 "Param": param_and_grad[0],
                 "Grad": param_and_grad[1],
-                "LearningRate": self._lr
+                "LearningRate": self._create_param_lr(param_and_grad)
             },
             outputs={"ParamOut": param_and_grad[0]})
 
@@ -259,19 +252,6 @@ class MomentumOptimizer(Optimizer):
         self._momentum = momentum
         self._use_nesterov = bool(use_nesterov)
 
-    def _initialize_tensors(self, block):
-        assert isinstance(block, framework.Block)
-        lr_shape = [1]
-        # create a variable for learning_rate
-        self._lr = self.helper.create_global_variable(
-            name=unique_name("learning_rate"),
-            dtype='float32',
-            shape=lr_shape,
-            lod_level=1,
-            persistable=True)
-        self.helper.set_variable_initializer(
-            var=self._lr, initializer=ConstantInitializer(self._learning_rate))
-
     def _create_accumulators(self, block, parameters):
         assert isinstance(block, framework.Block)
 
@@ -290,14 +270,14 @@ class MomentumOptimizer(Optimizer):
                 "Param": param_and_grad[0],
                 "Grad": param_and_grad[1],
                 "Velocity": velocity_acc,
-                "LearningRate": self._lr
+                "LearningRate": self._create_param_lr(param_and_grad)
             },
             outputs={
                 "ParamOut": param_and_grad[0],
                 "VelocityOut": velocity_acc
             },
             attrs={"mu": self._momentum,
-                   "useNesterov": self._use_nesterov})
+                   "use_nesterov": self._use_nesterov})
 
         return momentum_op
 
@@ -315,18 +295,6 @@ class AdagradOptimizer(Optimizer):
         self._learning_rate = learning_rate
         self._epsilon = epsilon
 
-    def _initialize_tensors(self, block):
-        lr_shape = [1]
-        # create a variable for learning_rate
-        self._lr = self.helper.create_global_variable(
-            name=unique_name("learning_rate"),
-            dtype='float32',
-            shape=lr_shape,
-            lod_level=1,
-            persistable=True)
-        self.helper.set_variable_initializer(
-            var=self._lr, initializer=ConstantInitializer(self._learning_rate))
-
     def _create_accumulators(self, block, parameters):
         assert isinstance(block, framework.Block)
 
@@ -346,7 +314,7 @@ class AdagradOptimizer(Optimizer):
                 "Param": param_and_grad[0],
                 "Grad": param_and_grad[1],
                 "Moment": moment_acc,
-                "LearningRate": self._lr
+                "LearningRate": self._create_param_lr(param_and_grad)
             },
             outputs={"ParamOut": param_and_grad[0],
                      "MomentOut": moment_acc},
@@ -378,18 +346,6 @@ class AdamOptimizer(Optimizer):
         self._beta2 = beta2
         self._epsilon = epsilon
 
-    def _initialize_tensors(self, block):
-        lr_shape = [1]
-        # create a variable for learning_rate
-        self._lr = self.helper.create_global_variable(
-            name=unique_name("learning_rate"),
-            dtype='float32',
-            shape=lr_shape,
-            lod_level=1,
-            persistable=True)
-        self.helper.set_variable_initializer(
-            var=self._lr, initializer=ConstantInitializer(self._learning_rate))
-
     def _create_accumulators(self, block, parameters):
         assert isinstance(block, framework.Block)
 
@@ -433,7 +389,7 @@ class AdamOptimizer(Optimizer):
             inputs={
                 "Param": param_and_grad[0],
                 "Grad": param_and_grad[1],
-                "LearningRate": self._lr,
+                "LearningRate": self._create_param_lr(param_and_grad),
                 "Moment1": moment1,
                 "Moment2": moment2,
                 "Beta1Pow": self._beta1_pow_acc,
@@ -495,18 +451,6 @@ class AdamaxOptimizer(Optimizer):
         self._beta2 = beta2
         self._epsilon = epsilon
 
-    def _initialize_tensors(self, block):
-        lr_shape = [1]
-        # create a variable for learning_rate
-        self._lr = self.helper.create_global_variable(
-            name=unique_name("learning_rate"),
-            dtype='float32',
-            shape=lr_shape,
-            lod_level=1,
-            persistable=True)
-        self.helper.set_variable_initializer(
-            var=self._lr, initializer=ConstantInitializer(self._learning_rate))
-
     def _create_accumulators(self, block, parameters):
         # Create beta1 power accumulator tensor
         beta_shape = [1]
@@ -536,7 +480,7 @@ class AdamaxOptimizer(Optimizer):
             inputs={
                 "Param": param_and_grad[0],
                 "Grad": param_and_grad[1],
-                "LearningRate": self._lr,
+                "LearningRate": self._create_param_lr(param_and_grad),
                 "Moment": moment,
                 "InfNorm": inf_norm,
                 "Beta1Pow": self._beta1_pow_acc

python/paddle/v2/framework/tests/op_test.py

@@ -215,6 +215,10 @@ class OpTest(unittest.TestCase):
             if isinstance(input_vars[var_name], list):
                 for name, np_value in self.inputs[var_name]:
                     tensor = core.LoDTensor()
+                    if isinstance(np_value, tuple):
+                        tensor.set(np_value[0], place)
+                        tensor.set_lod(np_value[1])
+                    else:
                         tensor.set(np_value, place)
                     feed_map[name] = tensor
             else:
@@ -236,7 +240,6 @@ class OpTest(unittest.TestCase):
 
         inputs = append_input_output(block, op_proto, self.inputs, True)
         outputs = append_input_output(block, op_proto, self.outputs, False)
-
         op = block.append_op(
             type=self.op_type,
             inputs=inputs,
@@ -397,9 +400,11 @@ class OpTest(unittest.TestCase):
                 if not isinstance(item[0], basestring):
                     item = [[param_name] + list(item)]
                 if len(item) == 2:
+                    if isinstance(item[1], tuple):
+                        var[i] = [item[0], item[1][0], item[1][1]]
+                    else:
                         # only set var name and value, set lod to None
                         var[i] = list(item) + [None]
-
             var_descs = [(block.create_var(
                 name=name, shape=each.shape, dtype=each.dtype), each, lod)
                          for name, each, lod in var]

python/paddle/v2/framework/tests/test_accuracy_op.py

@@ -26,5 +26,4 @@ class TestAccuracyOp(OpTest):
 
 
 if __name__ == '__main__':
-    exit(0)
     unittest.main()

python/paddle/v2/framework/tests/test_array_read_write_op.py

@@ -20,21 +20,19 @@ class TestArrayReadWrite(unittest.TestCase):
             each_x.stop_gradient = False
 
         i = layers.zeros(shape=[1], dtype='int64')
+        i.stop_gradient = False
         arr = layers.array_write(x=x[0], i=i)
         i = layers.increment(x=i)
-        i.stop_gradient = True
         arr = layers.array_write(x=x[1], i=i, array=arr)
         i = layers.increment(x=i)
-        i.stop_gradient = True
         arr = layers.array_write(x=x[2], i=i, array=arr)
 
         i = layers.zeros(shape=[1], dtype='int64')
+        i.stop_gradient = False
         a0 = layers.array_read(array=arr, i=i)
         i = layers.increment(x=i)
-        i.stop_gradient = True  # index should not calculate gradient
         a1 = layers.array_read(array=arr, i=i)
         i = layers.increment(x=i)
-        i.stop_gradient = True
         a2 = layers.array_read(array=arr, i=i)
 
         mean_a0 = layers.mean(x=a0)

python/paddle/v2/framework/tests/test_chunk_eval_op.py

+import unittest
+import numpy as np
+from op_test import OpTest
+
+
+class Segment(object):
+    def __init__(self, chunk_type, start_idx, end_idx):
+        self.chunk_type = chunk_type
+        self.start_idx = start_idx
+        self.end_idx = end_idx
+
+    def __str__(self):
+        return '(Segment: %s, %s, %s)' % (self.chunk_type, self.start_idx,
+                                          self.end_idx)
+
+    __repr__ = __str__
+
+
+class TestChunkEvalOp(OpTest):
+    num_sequences = 5
+    batch_size = 50
+
+    def parse_scheme(self):
+        if self.scheme == 'IOB':
+            self.num_tag_types = 2
+        elif self.scheme == 'IOE':
+            self.num_tag_types = 2
+
+    def fill_with_chunks(self, data, chunks):
+        for chunk in chunks:
+            if self.scheme == 'IOB':
+                data[chunk.start_idx] = chunk.chunk_type * self.num_tag_types
+                data[chunk.start_idx + 1:
+                     chunk.end_idx] = chunk.chunk_type * self.num_tag_types + (
+                         self.num_tag_types - 1)
+                data[chunk.end_idx] = chunk.chunk_type * self.num_tag_types + (
+                    self.num_tag_types - 1
+                ) if chunk.start_idx < chunk.end_idx else data[chunk.start_idx]
+            elif self.scheme == 'IOE':
+                data[chunk.start_idx:
+                     chunk.end_idx] = chunk.chunk_type * self.num_tag_types
+                data[chunk.end_idx] = chunk.chunk_type * self.num_tag_types + (
+                    self.num_tag_types - 1)
+
+    def rand_chunks(self, starts, num_chunks):
+        if num_chunks < 0:
+            num_chunks = np.random.randint(starts[-1])
+        chunks = []
+        # generate chunk beginnings
+        chunk_begins = sorted(
+            np.random.choice(
+                range(starts[-1]), num_chunks, replace=False))
+        seq_chunk_begins = []
+        begin_idx = 0
+        # divide chunks into sequences
+        for i in range(len(starts) - 1):
+            tmp_chunk_begins = []
+            while begin_idx < len(chunk_begins) and chunk_begins[
+                    begin_idx] < starts[i + 1]:
+                tmp_chunk_begins.append(chunk_begins[begin_idx])
+                begin_idx += 1
+            seq_chunk_begins.append(tmp_chunk_begins)
+        # generate chunk ends
+        chunk_ends = []
+        for i in range(len(seq_chunk_begins)):
+            for j in range(len(seq_chunk_begins[i])):
+                low = seq_chunk_begins[i][j]
+                high = seq_chunk_begins[i][j + 1] if j < len(seq_chunk_begins[
+                    i]) - 1 else starts[i + 1]
+                chunk_ends.append(np.random.randint(low, high))
+        # generate chunks
+        for chunk_pos in zip(chunk_begins, chunk_ends):
+            chunk_type = np.random.randint(self.num_chunk_types)
+            chunks.append(Segment(chunk_type, *chunk_pos))
+        return chunks
+
+    def gen_chunks(self, infer, label, starts):
+        chunks = self.rand_chunks(starts,
+                                  self.num_infer_chunks + self.num_label_chunks
+                                  - self.num_correct_chunks)
+        correct_chunks = np.random.choice(
+            range(len(chunks)), self.num_correct_chunks, replace=False)
+        infer_chunks = np.random.choice(
+            [x for x in range(len(chunks)) if x not in correct_chunks],
+            self.num_infer_chunks - self.num_correct_chunks,
+            replace=False)
+        infer_chunks = sorted(correct_chunks.tolist() + infer_chunks.tolist())
+        label_chunks = np.random.choice(
+            [x for x in range(len(chunks)) if x not in infer_chunks],
+            self.num_label_chunks - self.num_correct_chunks,
+            replace=False)
+        label_chunks = sorted(correct_chunks.tolist() + label_chunks.tolist())
+        self.fill_with_chunks(infer, [chunks[idx] for idx in infer_chunks])
+        self.fill_with_chunks(label, [chunks[idx] for idx in label_chunks])
+        # exclude types in excluded_chunk_types
+        if len(self.excluded_chunk_types) > 0:
+            for idx in correct_chunks:
+                if chunks[idx].chunk_type in self.excluded_chunk_types:
+                    self.num_correct_chunks -= 1
+            for idx in infer_chunks:
+                if chunks[idx].chunk_type in self.excluded_chunk_types:
+                    self.num_infer_chunks -= 1
+            for idx in label_chunks:
+                if chunks[idx].chunk_type in self.excluded_chunk_types:
+                    self.num_label_chunks -= 1
+        return self.num_correct_chunks, self.num_infer_chunks, self.num_label_chunks
+
+    def set_confs(self):
+        # Use the IOB scheme and labels with 2 chunk types
+        self.scheme = 'IOB'
+        self.num_chunk_types = 2
+        self.excluded_chunk_types = []
+        self.other_chunk_type = self.num_chunk_types
+        self.attrs = {
+            'num_chunk_types': self.num_chunk_types,
+            'chunk_scheme': self.scheme,
+            'excluded_chunk_types': self.excluded_chunk_types
+        }
+        self.parse_scheme()
+        self.num_correct_chunks, self.num_infer_chunks, self.num_label_chunks = 4, 5, 9
+
+    def set_data(self):
+        infer = np.zeros((self.batch_size, )).astype('int32')
+        infer.fill(self.num_chunk_types * self.num_tag_types)
+        label = np.copy(infer)
+        starts = np.random.choice(
+            range(1, self.batch_size), self.num_sequences - 1,
+            replace=False).tolist()
+        starts.extend([0, self.batch_size])
+        starts = sorted(starts)
+        self.num_correct_chunks, self.num_infer_chunks, self.num_label_chunks = self.gen_chunks(
+            infer, label, starts)
+        self.inputs = {
+            'Inference': (infer, [starts]),
+            'Label': (label, [starts])
+        }
+        precision = float(
+            self.num_correct_chunks
+        ) / self.num_infer_chunks if self.num_infer_chunks else 0
+        recall = float(self.num_correct_chunks
+                       ) / self.num_label_chunks if self.num_label_chunks else 0
+        f1 = float(2 * precision * recall) / (
+            precision + recall) if self.num_correct_chunks else 0
+        self.outputs = {
+            'Precision': np.asarray(
+                [precision], dtype='float32'),
+            'Recall': np.asarray(
+                [recall], dtype='float32'),
+            'F1-Score': np.asarray(
+                [f1], dtype='float32')
+        }
+
+    def setUp(self):
+        self.op_type = 'chunk_eval'
+        self.set_confs()
+        self.set_data()
+
+    def test_check_output(self):
+        self.check_output()
+
+
+class TestChunkEvalOpWithExclude(TestChunkEvalOp):
+    def set_confs(self):
+        # Use the IOE scheme and labels with 3 chunk types
+        self.scheme = 'IOE'
+        self.num_chunk_types = 3
+        self.excluded_chunk_types = [1]
+        self.other_chunk_type = self.num_chunk_types
+        self.attrs = {
+            'num_chunk_types': self.num_chunk_types,
+            'chunk_scheme': self.scheme,
+            'excluded_chunk_types': self.excluded_chunk_types
+        }
+        self.parse_scheme()
+        self.num_correct_chunks, self.num_infer_chunks, self.num_label_chunks = 15, 18, 20
+
+
+if __name__ == '__main__':
+    unittest.main()

python/paddle/v2/framework/tests/test_clip_by_norm_op.py

+import unittest
+import numpy as np
+from op_test import OpTest
+
+
+class TestClipByNormOp(OpTest):
+    def setUp(self):
+        self.max_relative_error = 0.006
+        self.initTestCase()
+        input = np.random.random(self.shape).astype("float32")
+        input[np.abs(input) < self.max_relative_error] = 0.5
+        self.op_type = "clip_by_norm"
+        self.inputs = {'X': input, }
+        self.attrs = {}
+        self.attrs['max_norm'] = self.max_norm
+        norm = np.sqrt(np.sum(np.square(input)))
+        if norm > self.max_norm:
+            output = self.max_norm * input / norm
+        else:
+            output = input
+        self.outputs = {'Out': output}
+
+    def test_check_output(self):
+        self.check_output()
+
+    def initTestCase(self):
+        self.shape = (100, )
+        self.max_norm = 1.0
+
+
+class TestCase1(TestClipByNormOp):
+    def initTestCase(self):
+        self.shape = (100, )
+        self.max_norm = 1e20
+
+
+class TestCase2(TestClipByNormOp):
+    def initTestCase(self):
+        self.shape = (16, 16)
+        self.max_norm = 0.1
+
+
+class TestCase3(TestClipByNormOp):
+    def initTestCase(self):
+        self.shape = (4, 8, 16)
+        self.max_norm = 1.0
+
+
+if __name__ == '__main__':
+    unittest.main()

python/paddle/v2/framework/tests/test_expand_op.py

+import unittest
+import numpy as np
+from op_test import OpTest
+
+
+class TestExpandOpRank1(OpTest):
+    def setUp(self):
+        self.op_type = "expand"
+        self.inputs = {'X': np.random.random(12).astype("float32")}
+        self.attrs = {'expand_times': [2]}
+        output = np.tile(self.inputs['X'], 2)
+        self.outputs = {'Out': output}
+
+    def test_check_output(self):
+        self.check_output()
+
+    def test_check_grad(self):
+        self.check_grad(['X'], 'Out')
+
+
+class TestExpandOpRank2_Corner(OpTest):
+    def setUp(self):
+        self.op_type = "expand"
+        self.inputs = {'X': np.random.random((12, 14)).astype("float32")}
+        self.attrs = {'expand_times': [1, 1]}
+        output = np.tile(self.inputs['X'], (1, 1))
+        self.outputs = {'Out': output}
+
+    def test_check_output(self):
+        self.check_output()
+
+    def test_check_grad(self):
+        self.check_grad(['X'], 'Out')
+
+
+class TestExpandOpRank2(OpTest):
+    def setUp(self):
+        self.op_type = "expand"
+        self.inputs = {'X': np.random.random((12, 14)).astype("float32")}
+        self.attrs = {'expand_times': [2, 3]}
+        output = np.tile(self.inputs['X'], (2, 3))
+        self.outputs = {'Out': output}
+
+    def test_check_output(self):
+        self.check_output()
+
+    def test_check_grad(self):
+        self.check_grad(['X'], 'Out')
+
+
+class TestExpandOpRank3_Corner(OpTest):
+    def setUp(self):
+        self.op_type = "expand"
+        self.inputs = {'X': np.random.random((2, 4, 5)).astype("float32")}
+        self.attrs = {'expand_times': [1, 1, 1]}
+        output = np.tile(self.inputs['X'], (1, 1, 1))
+        self.outputs = {'Out': output}
+
+    def test_check_output(self):
+        self.check_output()
+
+    def test_check_grad(self):
+        self.check_grad(['X'], 'Out')
+
+
+class TestExpandOpRank3(OpTest):
+    def setUp(self):
+        self.op_type = "expand"
+        self.inputs = {'X': np.random.random((2, 4, 5)).astype("float32")}
+        self.attrs = {'expand_times': [2, 1, 4]}
+        output = np.tile(self.inputs['X'], (2, 1, 4))
+        self.outputs = {'Out': output}
+
+    def test_check_output(self):
+        self.check_output()
+
+    def test_check_grad(self):
+        self.check_grad(['X'], 'Out')
+
+
+class TestExpandOpRank4(OpTest):
+    def setUp(self):
+        self.op_type = "expand"
+        self.inputs = {'X': np.random.random((2, 4, 5, 7)).astype("float32")}
+        self.attrs = {'expand_times': [3, 2, 1, 2]}
+        output = np.tile(self.inputs['X'], (3, 2, 1, 2))
+        self.outputs = {'Out': output}
+
+    def test_check_output(self):
+        self.check_output()
+
+    def test_check_grad(self):
+        self.check_grad(['X'], 'Out')
+
+
+if __name__ == "__main__":
+    unittest.main()

python/paddle/v2/framework/tests/test_fit_a_line.py

@@ -3,7 +3,7 @@ import paddle.v2.framework.layers as layers
 import paddle.v2.framework.core as core
 import paddle.v2.framework.optimizer as optimizer
 
-from paddle.v2.framework.framework import Program, g_main_program
+from paddle.v2.framework.framework import Program
 from paddle.v2.framework.io import save_persistables, load_persistables
 from paddle.v2.framework.executor import Executor
 

python/paddle/v2/framework/tests/test_increment_op.py

-import unittest
-import numpy as np
-from op_test import OpTest
-
-
-class TestIncrementOpPositiveStep(OpTest):
-    """Test increment op with positive step
-    """
-
-    def setUp(self):
-        self.op_type = "increment"
-        self.inputs = {'X': np.random.random((10, 10)).astype("float32")}
-        self.attrs = {'step': 14.8}
-        self.outputs = {'Out': self.inputs['X'] + self.attrs['step']}
-
-    def test_check_output(self):
-        self.check_output()
-
-    def test_check_grad(self):
-        self.check_grad(['X'], 'Out')
-
-
-class TestIncrementOpNegativeStep(OpTest):
-    """Test increment op with negative step
-    """
-
-    def setUp(self):
-        self.op_type = "increment"
-        self.inputs = {'X': np.random.random((10, 10)).astype("float32")}
-        self.attrs = {'step': -3.8}
-        self.outputs = {'Out': self.inputs['X'] + self.attrs['step']}
-
-    def test_check_output(self):
-        self.check_output()
-
-    def test_check_grad(self):
-        self.check_grad(['X'], 'Out')
-
-
-if __name__ == "__main__":
-    unittest.main()

python/paddle/v2/framework/tests/test_inference_model_io.py

@@ -3,7 +3,7 @@ import paddle.v2.framework.layers as layers
 import paddle.v2.framework.core as core
 import paddle.v2.framework.optimizer as optimizer
 
-from paddle.v2.framework.framework import Program, g_main_program
+from paddle.v2.framework.framework import Program
 from paddle.v2.framework.io import save_inference_model, load_inference_model
 import paddle.v2.framework.executor as executor
 import unittest

python/paddle/v2/framework/tests/test_layers.py

 import paddle.v2.framework.layers as layers
 import paddle.v2.framework.nets as nets
-from paddle.v2.framework.framework import Program, g_main_program
+from paddle.v2.framework.framework import Program
 import paddle.v2.framework.core as core
 import unittest
 

python/paddle/v2/framework/tests/test_lod_array_length_op.py

+import unittest
+import paddle.v2.framework.layers as layers
+from paddle.v2.framework.executor import Executor
+import paddle.v2.framework.core as core
+import numpy
+
+
+class TestLoDArrayLength(unittest.TestCase):
+    def test_array_length(self):
+        tmp = layers.zeros(shape=[10], dtype='int32')
+        i = layers.fill_constant(shape=[1], dtype='int64', value=10)
+        arr = layers.array_write(tmp, i=i)
+        arr_len = layers.array_length(arr)
+        cpu = core.CPUPlace()
+        exe = Executor(cpu)
+        result = numpy.array(exe.run(fetch_list=[arr_len])[0])
+        self.assertEqual(11, result[0])
+
+
+if __name__ == '__main__':
+    unittest.main()

python/paddle/v2/framework/tests/test_lod_tensor_array_ops.py

@@ -4,6 +4,7 @@ import numpy
 import paddle.v2.framework.layers as layers
 from paddle.v2.framework.framework import Program
 from paddle.v2.framework.executor import Executor
+from paddle.v2.framework.backward import append_backward_ops
 
 
 class TestCPULoDTensorArrayOps(unittest.TestCase):
@@ -123,5 +124,42 @@ class TestCPULoDTensorArrayOps(unittest.TestCase):
         self.assertEqual(actual.lod(), expect.lod())
 
 
+class TestCPULoDTensorArrayOpGrad(unittest.TestCase):
+    def test_grad(self):
+        place = core.CPUPlace()
+        program = Program()
+
+        x = layers.data(
+            name='x',
+            shape=[1],
+            data_type='float32',
+            main_program=program,
+            stop_gradient=False)
+        table = layers.lod_rank_table(x, level=0, main_program=program)
+        array = layers.lod_tensor_to_array(x, table, main_program=program)
+        result = layers.array_to_lod_tensor(array, table, main_program=program)
+
+        mean = layers.mean(x=result, main_program=program)
+
+        append_backward_ops(mean)
+
+        tensor = core.LoDTensor()
+        tensor.set(numpy.arange(10).reshape(10, 1).astype('float32'), place)
+        tensor.set_lod([[0, 3, 9, 10]])
+
+        g_vars = program.global_block().var(x.name + "@GRAD")
+
+        exe = Executor(place)
+        g_out = [
+            item.sum()
+            for item in map(
+                numpy.array,
+                exe.run(program, feed={'x': tensor}, fetch_list=[g_vars]))
+        ]
+        g_out_sum = numpy.array(g_out).sum()
+
+        self.assertAlmostEqual(1.0, g_out_sum, delta=0.1)
+
+
 if __name__ == '__main__':
     unittest.main()

python/paddle/v2/framework/tests/test_lstm_op.py

@@ -117,8 +117,9 @@ class TestLstmOp(OpTest):
         self.act_cell = 'tanh'
         self.act_cand = 'tanh'
 
-        self.has_initial_state = True
+        self.has_initial_state = False
         self.is_reverse = False
+        self.use_peepholes = True
 
     def setUp(self):
         self.set_argument()
@@ -128,18 +129,28 @@ class TestLstmOp(OpTest):
         N = len(self.lod[0]) - 1
 
         x = np.random.normal(size=(T, 4 * self.D)).astype('float64')
+        if self.has_initial_state:
+            h0 = np.random.normal(size=(N, self.D)).astype('float64')
+            c0 = np.random.normal(size=(N, self.D)).astype('float64')
+        else:
             h0 = np.zeros((N, self.D)).astype('float64')
             c0 = np.zeros((N, self.D)).astype('float64')
         w = np.random.normal(size=(self.D, 4 * self.D)).astype('float64')
+        if self.use_peepholes:
             b = np.random.normal(size=(1, 7 * self.D)).astype('float64')
+        else:
+            b = np.random.normal(size=(1, 4 * self.D)).astype('float64')
 
         w_b = b[:, 0:4 * self.D]
-        w_c = b[:, 4 * self.D:]
+        w_c = b[:, 4 * self.D:] if self.use_peepholes else None
         h, c = lstm(x, self.lod, h0, c0, w, w_b, w_c, self.is_reverse,
                     ACTVATION[self.act_gate], ACTVATION[self.act_cell],
                     ACTVATION[self.act_cand])
 
-        self.inputs = {'Input': (x, self.lod), 'Weight': w, 'Bias': b}
+        self.inputs = {'Input': (x, self.lod), 'Weight': w}
+
+        self.inputs['Bias'] = b
+
         if self.has_initial_state:
             self.inputs['H0'] = h0
             self.inputs['C0'] = c0
@@ -149,17 +160,16 @@ class TestLstmOp(OpTest):
             'Cell': (c, self.lod),
         }
         self.attrs = {
-            'usePeepholes': True,
-            'isReverse': self.is_reverse,
-            'gateActivation': self.act_gate,
-            'cellActivation': self.act_cell,
-            'candidateActivation': self.act_cand
+            'use_peepholes': self.use_peepholes,
+            'is_reverse': self.is_reverse,
+            'gate_activation': self.act_gate,
+            'cell_activation': self.act_cell,
+            'candidate_activation': self.act_cand
         }
 
     def test_check_output(self):
         self.check_output(atol=1e-8)
 
-    #TODO(qingqing) add more unit testing case
     def test_check_grad(self):
         # TODO(qingqing) remove folowing lines after the check_grad is refined.
         N = len(self.lod[0]) - 1
@@ -170,7 +180,7 @@ class TestLstmOp(OpTest):
             ['Input', 'Weight', 'Bias'], ['Hidden'], max_relative_error=5e-4)
 
 
-class TestLstmOpHasNoInitial(TestLstmOp):
+class TestLstmOpHasInitial(TestLstmOp):
     def set_argument(self):
         self.lod = [[0, 2, 5, 7]]
         self.D = 16
@@ -179,8 +189,69 @@ class TestLstmOpHasNoInitial(TestLstmOp):
         self.act_cell = 'tanh'
         self.act_cand = 'tanh'
 
-        self.has_initial_state = False
+        self.has_initial_state = True
         self.is_reverse = True
+        self.use_peepholes = True
+
+    def test_check_grad(self):
+        # TODO(qingqing) remove folowing lines after the check_grad is refined.
+        N = len(self.lod[0]) - 1
+        self.outputs['BatchGate'] = np.zeros((N, 4 * self.D)).astype('float64')
+        self.outputs['BatchCellPreAct'] = np.zeros(
+            (N, self.D)).astype('float64')
+        self.check_grad(
+            ['Input', 'Weight', 'Bias', 'H0', 'C0'], ['Hidden'],
+            max_relative_error=5e-4)
+
+    def test_check_grad_ingore_bias(self):
+        N = len(self.lod[0]) - 1
+        self.outputs['BatchGate'] = np.zeros((N, 4 * self.D)).astype('float64')
+        self.outputs['BatchCellPreAct'] = np.zeros(
+            (N, self.D)).astype('float64')
+        self.check_grad(
+            ['Input', 'Weight'], ['Hidden'],
+            max_relative_error=5e-4,
+            no_grad_set=set('Bias'))
+
+    def test_check_grad_ingore_weight(self):
+        N = len(self.lod[0]) - 1
+        self.outputs['BatchGate'] = np.zeros((N, 4 * self.D)).astype('float64')
+        self.outputs['BatchCellPreAct'] = np.zeros(
+            (N, self.D)).astype('float64')
+        self.check_grad(
+            ['Input', 'Bias'], ['Hidden'],
+            max_relative_error=5e-4,
+            no_grad_set=set('Weight'))
+
+    def test_check_grad_ingore_input(self):
+        N = len(self.lod[0]) - 1
+        self.outputs['BatchGate'] = np.zeros((N, 4 * self.D)).astype('float64')
+        self.outputs['BatchCellPreAct'] = np.zeros(
+            (N, self.D)).astype('float64')
+        self.check_grad(
+            ['Weight', 'Bias'], ['Hidden'],
+            max_relative_error=5e-4,
+            no_grad_set=set('Input'))
+
+    def test_check_grad_ingore_h0(self):
+        N = len(self.lod[0]) - 1
+        self.outputs['BatchGate'] = np.zeros((N, 4 * self.D)).astype('float64')
+        self.outputs['BatchCellPreAct'] = np.zeros(
+            (N, self.D)).astype('float64')
+        self.check_grad(
+            ['Input', 'Weight', 'Bias', 'C0'], ['Hidden'],
+            max_relative_error=5e-4,
+            no_grad_set=set('H0'))
+
+    def test_check_grad_ingore_c0(self):
+        N = len(self.lod[0]) - 1
+        self.outputs['BatchGate'] = np.zeros((N, 4 * self.D)).astype('float64')
+        self.outputs['BatchCellPreAct'] = np.zeros(
+            (N, self.D)).astype('float64')
+        self.check_grad(
+            ['Input', 'Weight', 'Bias', 'H0'], ['Hidden'],
+            max_relative_error=5e-4,
+            no_grad_set=set('C0'))
 
 
 class TestLstmOpRerverse(TestLstmOp):
@@ -192,8 +263,23 @@ class TestLstmOpRerverse(TestLstmOp):
         self.act_cell = 'tanh'
         self.act_cand = 'tanh'
 
-        self.has_initial_state = True
+        self.has_initial_state = False
+        self.is_reverse = True
+        self.use_peepholes = True
+
+
+class TestLstmOpNotUsePeepholes(TestLstmOp):
+    def set_argument(self):
+        self.lod = [[0, 2, 5, 7]]
+        self.D = 16
+
+        self.act_gate = 'sigmoid'
+        self.act_cell = 'tanh'
+        self.act_cand = 'tanh'
+
+        self.has_initial_state = False
         self.is_reverse = True
+        self.use_peepholes = False
 
 
 if __name__ == '__main__':

python/paddle/v2/framework/tests/test_momentum_op.py

@@ -37,7 +37,7 @@ class TestMomentumOp1(OpTest):
 
 
 class TestMomentumOp2(OpTest):
-    '''Test Momentum with defaukt values for attributes
+    '''Test Momentum with default values for attributes
     '''
 
     def setUp(self):
@@ -57,7 +57,7 @@ class TestMomentumOp2(OpTest):
             'LearningRate': learning_rate
         }
 
-        self.attrs = {'mu': mu, 'useNesterov': use_nesterov}
+        self.attrs = {'mu': mu, 'use_nesterov': use_nesterov}
 
         velocity_out = mu * velocity + grad
         if use_nesterov:

python/paddle/v2/framework/tests/test_optimizer.py

@@ -98,7 +98,7 @@ class TestMomentumOptimizer(unittest.TestCase):
         self.assertEqual(len(opts), 1)
         sgd_op = opts[0]
         self.assertEqual(sgd_op.type, "momentum")
-        self.assertFalse(sgd_op.attr('useNesterov'))
+        self.assertFalse(sgd_op.attr('use_nesterov'))
 
         # Check accumulators
         accumulators = momentum_optimizer.get_accumulators()
@@ -143,7 +143,7 @@ class TestMomentumOptimizer(unittest.TestCase):
         self.assertEqual(len(opts), 1)
         sgd_op = opts[0]
         self.assertEqual(sgd_op.type, "momentum")
-        self.assertTrue(sgd_op.attr('useNesterov'))
+        self.assertTrue(sgd_op.attr('use_nesterov'))
 
         # Check accumulators
         accumulators = momentum_optimizer.get_accumulators()

python/paddle/v2/framework/tests/test_pool2d_op.py

@@ -61,8 +61,8 @@ class TestPool2d_Op(OpTest):
             'strides': self.strides,
             'paddings': self.paddings,
             'ksize': self.ksize,
-            'poolingType': self.pool_type,
-            'globalPooling': self.global_pool,
+            'pooling_type': self.pool_type,
+            'global_pooling': self.global_pool,
         }
 
         self.outputs = {'Out': output.astype('float32')}

python/paddle/v2/framework/tests/test_pool3d_op.py

@@ -67,8 +67,8 @@ class TestPool3d_Op(OpTest):
             'strides': self.strides,
             'paddings': self.paddings,
             'ksize': self.ksize,
-            'poolingType': self.pool_type,
-            'globalPooling': self.global_pool,
+            'pooling_type': self.pool_type,
+            'global_pooling': self.global_pool,
         }
 
         self.outputs = {'Out': output.astype('float32')}

python/paddle/v2/framework/tests/test_pool_max_op.py

@@ -86,7 +86,7 @@ class TestMaxPoolWithIndex_Op(OpTest):
             'strides': self.strides,
             'paddings': self.paddings,
             'ksize': self.ksize,
-            'globalPooling': self.global_pool,
+            'global_pooling': self.global_pool,
         }
 
         self.inputs = {'X': input}

python/paddle/v2/framework/tests/test_recognize_digits_conv.py

@@ -4,7 +4,7 @@ import paddle.v2.framework.nets as nets
 import paddle.v2.framework.core as core
 import paddle.v2.framework.optimizer as optimizer
 
-from paddle.v2.framework.framework import Program, g_main_program
+from paddle.v2.framework.framework import Program
 from paddle.v2.framework.executor import Executor
 
 import numpy as np

python/paddle/v2/framework/tests/test_recommender_system.py

@@ -4,7 +4,7 @@ import paddle.v2.framework.nets as nets
 import paddle.v2.framework.core as core
 import paddle.v2.framework.optimizer as optimizer
 
-from paddle.v2.framework.framework import Program, g_main_program
+from paddle.v2.framework.framework import Program
 from paddle.v2.framework.executor import Executor
 
 import numpy as np

python/paddle/v2/framework/tests/test_seq_concat_op.py

@@ -2,9 +2,36 @@ import unittest
 import numpy as np
 import sys
 from op_test import OpTest
+exit(0)
 
 
-class TestConcatOp(OpTest):
+def to_abs_lod(lod):
+    if len(lod) == 0 or len(lod) == 1:
+        return lod
+    import copy
+    new_lod = copy.deepcopy(lod)
+    for idx, val in enumerate(lod[0]):
+        new_lod[0][idx] = lod[1][val]
+    return new_lod
+
+
+def seq_concat(inputs, level):
+    lod0 = inputs['X'][0][1][1]
+    lod1 = inputs['X'][1][1][1]
+    x0 = inputs['X'][0][1][0]
+    x1 = inputs['X'][1][1][0]
+    level_idx = len(lod0) - level - 1
+    outs = []
+    for i in range(len(lod0[level_idx]) - 1):
+        sub_x0 = x0[to_abs_lod(lod0)[level_idx][i]:to_abs_lod(lod0)[level_idx][
+            i + 1], :]
+        sub_x1 = x1[to_abs_lod(lod1)[level_idx][i]:to_abs_lod(lod1)[level_idx][
+            i + 1], :]
+        outs.append(np.concatenate((sub_x0, sub_x1), axis=0))
+    return np.concatenate(outs, axis=0)
+
+
+class TestSeqConcatOp(OpTest):
     def set_data(self):
         # two level, batch size is 3
         x0 = np.random.random((4, 6, 3)).astype('float32')
@@ -15,13 +42,7 @@ class TestConcatOp(OpTest):
         level = 1
         self.inputs = {'X': [('x0', (x0, lod0)), ('x1', (x1, lod1))]}
         self.attrs = {'axis': axis, 'level': level}
-        outs = []
-        for i in range(4):
-            sub_x0 = x0[lod0[level][i]:lod0[level][i + 1], :]
-            sub_x1 = x1[lod1[level][i]:lod1[level][i + 1], :]
-            outs.append(np.concatenate((sub_x0, sub_x1), axis=axis))
-
-        self.outputs = {'Out': np.concatenate(outs, axis=0)}
+        self.outputs = {'Out': (np.concatenate([x0, x1], axis=1), lod0)}
 
     def setUp(self):
         self.op_type = "sequence_concat"
@@ -34,46 +55,50 @@ class TestConcatOp(OpTest):
         self.check_grad(['x0'], 'Out')
 
 
-class TestConcatOpDiffLod(TestConcatOp):
+class TestSeqConcatOpLevelZeroNestedSequence(TestSeqConcatOp):
     def set_data(self):
         # two level, batch size is 3
         x0 = np.random.random((4, 6, 3)).astype('float32')
         lod0 = [[0, 2, 4], [0, 1, 2, 3, 4]]
-        x1 = np.random.random((5, 6, 3)).astype('float32')
-        lod1 = [[0, 3, 5], [0, 1, 2, 3, 5]]
+        x1 = np.random.random((7, 6, 3)).astype('float32')
+        lod1 = [[0, 2, 4], [0, 1, 3, 5, 7]]
         axis = 0
-        level = 1
+        level = 0
         self.inputs = {'X': [('x0', (x0, lod0)), ('x1', (x1, lod1))]}
         self.attrs = {'axis': axis, 'level': level}
-        outs = []
-        for i in range(4):
-            sub_x0 = x0[lod0[level][i]:lod0[level][i + 1], :]
-            sub_x1 = x1[lod1[level][i]:lod1[level][i + 1], :]
-            outs.append(np.concatenate((sub_x0, sub_x1), axis=axis))
+        out_lod = [[0, 2, 4], [0, 2, 5, 8, 11]]
+        self.outputs = {'Out': (seq_concat(self.inputs, level), out_lod)}
+
 
-        self.outputs = {'Out': np.concatenate(outs, axis=0)}
+class TestSeqConcatOplevelOneNestedSequence(TestSeqConcatOp):
+    def set_data(self):
+        # two level, batch size is 3
+        x0 = np.random.random((4, 6, 3)).astype('float32')
+        lod0 = [[0, 2, 4], [0, 1, 2, 3, 4]]
+        x1 = np.random.random((7, 6, 3)).astype('float32')
+        lod1 = [[0, 3, 4], [0, 1, 3, 5, 7]]
+        axis = 0
+        level = 1
+        self.inputs = {'X': [('x0', (x0, lod0)), ('x1', (x1, lod1))]}
+        self.attrs = {'axis': axis, 'level': level}
+        out_lod = [[0, 5, 8], [0, 1, 2, 3, 5, 7, 8, 9, 11]]
+        self.outputs = {'Out': (seq_concat(self.inputs, level), out_lod)}
 
 
-class TestConcatOpLevelZero(TestConcatOp):
+class TestSeqConcatOpLevelZeroSequence(TestSeqConcatOp):
     def set_data(self):
         # two level, batch size is 3
         x0 = np.random.random((4, 3, 4)).astype('float32')
-        lod0 = [[0, 2, 4], [0, 1, 2, 3, 4]]
-        x1 = np.random.random((5, 3, 4)).astype('float32')
-        lod1 = [[0, 3, 5], [0, 1, 3, 4, 5]]
+        lod0 = [[0, 1, 2, 3, 4]]
+        x1 = np.random.random((7, 3, 4)).astype('float32')
+        lod1 = [[0, 1, 3, 5, 7]]
         axis = 0
         level = 0
         self.inputs = {'X': [('x0', (x0, lod0)), ('x1', (x1, lod1))]}
         self.attrs = {'axis': axis, 'level': level}
-        outs = []
-        for i in range(2):
-            sub_x0 = x0[lod0[level][i]:lod0[level][i + 1], :]
-            sub_x1 = x1[lod1[level][i]:lod1[level][i + 1], :]
-            outs.append(np.concatenate((sub_x0, sub_x1), axis=axis))
-
-        self.outputs = {'Out': np.concatenate(outs, axis=0)}
+        out_lod = [[0, 2, 5, 8, 11]]
+        self.outputs = {'Out': (seq_concat(self.inputs, level), out_lod)}
 
 
 if __name__ == '__main__':
-    sys.exit(0)
     unittest.main()

python/paddle/v2/framework/tests/test_shrink_rnn_memory.py

+import unittest
+import paddle.v2.framework.core as core
+from paddle.v2.framework.executor import Executor
+import paddle.v2.framework.layers as layers
+from paddle.v2.framework.backward import append_backward_ops
+from paddle.v2.framework.framework import g_main_program
+import numpy
+
+
+class TestShrinkRNNMemory(unittest.TestCase):
+    def test_shrink_rnn_memory(self):
+        x = layers.data('x', shape=[100], data_type='float32')
+        x.stop_gradient = False
+        table = layers.lod_rank_table(x=x)
+        i = layers.zeros(dtype='int64', shape=[1])
+        mem1 = layers.shrink_memory(x=x, i=i, table=table)
+        i = layers.increment(x=i)
+        i.stop_gradient = True
+        mem2 = layers.shrink_memory(x=mem1, i=i, table=table)
+        i = layers.increment(x=i)
+        i.stop_gradient = True
+        mem3 = layers.shrink_memory(x=mem2, i=i, table=table)
+
+        cpu = core.CPUPlace()
+        tensor = core.LoDTensor()
+        tensor.set_lod([[0, 2, 5, 6]])
+        tensor_np = numpy.random.random(size=(3, 100)).astype('float32')
+        tensor.set(tensor_np, cpu)
+        exe = Executor(cpu)
+        outs = map(numpy.array,
+                   exe.run(feed={'x': tensor}, fetch_list=[mem1, mem2, mem3]))
+        self.assertTrue(numpy.allclose(tensor_np[0:3], outs[0]))
+        self.assertTrue(numpy.allclose(tensor_np[0:2], outs[1]))
+        self.assertTrue(numpy.allclose(tensor_np[0:1], outs[2]))
+
+        mem3_mean = layers.mean(x=mem3)
+        append_backward_ops(loss=mem3_mean)
+        x_grad = map(numpy.array,
+                     exe.run(feed={'x': tensor},
+                             fetch_list=[
+                                 g_main_program.global_block().var('x@GRAD')
+                             ]))[0]
+        self.assertAlmostEqual(1.0, x_grad.sum(), delta=0.1)
+
+
+if __name__ == '__main__':
+    unittest.main()

python/paddle/v2/framework/tests/test_understand_sentiment_lstm.py

+import paddle.v2 as paddle
+import paddle.v2.framework.layers as layers
+import paddle.v2.framework.core as core
+import paddle.v2.framework.optimizer as optimizer
+
+from paddle.v2.framework.framework import g_main_program, g_startup_program
+from paddle.v2.framework.executor import Executor
+
+import numpy as np
+
+
+def lstm_net(dict_dim, class_dim=2, emb_dim=32, seq_len=80, batch_size=50):
+    data = layers.data(
+        name="words",
+        shape=[seq_len * batch_size, 1],
+        append_batch_size=False,
+        data_type="int64")
+    label = layers.data(
+        name="label",
+        shape=[batch_size, 1],
+        append_batch_size=False,
+        data_type="int64")
+
+    emb = layers.embedding(input=data, size=[dict_dim, emb_dim])
+    emb = layers.reshape(x=emb, shape=[batch_size, seq_len, emb_dim])
+    emb = layers.transpose(x=emb, axis=[1, 0, 2])
+
+    c_pre_init = layers.fill_constant(
+        dtype=emb.data_type, shape=[batch_size, emb_dim], value=0.0)
+    layer_1_out = layers.lstm(emb, c_pre_init=c_pre_init, hidden_dim=emb_dim)
+    layer_1_out = layers.transpose(x=layer_1_out, axis=[1, 0, 2])
+
+    prediction = layers.fc(input=layer_1_out, size=class_dim, act="softmax")
+    cost = layers.cross_entropy(input=prediction, label=label)
+
+    avg_cost = layers.mean(x=cost)
+    adam_optimizer = optimizer.AdamOptimizer(learning_rate=0.002)
+    opts = adam_optimizer.minimize(avg_cost)
+    acc = layers.accuracy(input=prediction, label=label)
+
+    return avg_cost, acc
+
+
+def to_lodtensor(data, place):
+    seq_lens = [len(seq) for seq in data]
+    cur_len = 0
+    lod = [cur_len]
+    for l in seq_lens:
+        cur_len += l
+        lod.append(cur_len)
+    flattened_data = np.concatenate(data, axis=0).astype("int64")
+    flattened_data = flattened_data.reshape([len(flattened_data), 1])
+    res = core.LoDTensor()
+    res.set(flattened_data, place)
+    res.set_lod([lod])
+    return res
+
+
+def chop_data(data, chop_len=80, batch_len=50):
+    data = [(x[0][:chop_len], x[1]) for x in data if len(x[0]) >= chop_len]
+
+    return data[:batch_len]
+
+
+def prepare_feed_data(data, place):
+    tensor_words = to_lodtensor(map(lambda x: x[0], data), place)
+
+    label = np.array(map(lambda x: x[1], data)).astype("int64")
+    label = label.reshape([50, 1])
+    tensor_label = core.LoDTensor()
+    tensor_label.set(label, place)
+
+    return tensor_words, tensor_label
+
+
+def main():
+    word_dict = paddle.dataset.imdb.word_dict()
+    cost, acc = lstm_net(dict_dim=len(word_dict), class_dim=2)
+
+    batch_size = 100
+    train_data = paddle.batch(
+        paddle.reader.buffered(
+            paddle.dataset.imdb.train(word_dict), size=batch_size * 10),
+        batch_size=batch_size)
+
+    data = chop_data(next(train_data()))
+
+    place = core.CPUPlace()
+    tensor_words, tensor_label = prepare_feed_data(data, place)
+    exe = Executor(place)
+    exe.run(g_startup_program)
+
+    while True:
+        outs = exe.run(g_main_program,
+                       feed={"words": tensor_words,
+                             "label": tensor_label},
+                       fetch_list=[cost, acc])
+        cost_val = np.array(outs[0])
+        acc_val = np.array(outs[1])
+
+        print("cost=" + str(cost_val) + " acc=" + str(acc_val))
+        if acc_val > 0.9:
+            break
+
+
+if __name__ == '__main__':
+    main()

python/paddle/v2/framework/tests/test_while_op.py

+import unittest
+import paddle.v2.framework.layers as layers
+from paddle.v2.framework.executor import Executor
+import paddle.v2.framework.core as core
+import numpy
+
+
+class TestWhileOp(unittest.TestCase):
+    def test_simple_forward(self):
+        d0 = layers.data(
+            "d0", shape=[10], append_batch_size=False, data_type='float32')
+        d1 = layers.data(
+            "d1", shape=[10], append_batch_size=False, data_type='float32')
+        d2 = layers.data(
+            "d2", shape=[10], append_batch_size=False, data_type='float32')
+        i = layers.zeros(shape=[1], dtype='int64')
+        i.stop_gradient = True
+        init = layers.zeros(shape=[10], dtype='float32')
+        mem_array = layers.array_write(init, i=i)
+        data_array = layers.array_write(x=d0, i=i)
+
+        i = layers.increment(i)
+        layers.array_write(d1, i, array=data_array)
+
+        i = layers.increment(i)
+        layers.array_write(d2, i, array=data_array)
+
+        i = layers.zeros(shape=[1], dtype='int64')
+        i.stop_gradient = True
+
+        array_len = layers.fill_constant(shape=[1], dtype='int64', value=3)
+        cond = layers.less_than(x=i, y=array_len)
+
+        while_op = layers.While(cond=cond)
+        with while_op.block():
+            d = layers.array_read(array=data_array, i=i)
+            prev = layers.array_read(array=mem_array, i=i)
+            i = layers.increment(x=i, in_place=True)
+            result = layers.sums(input=[d, prev])
+            layers.array_write(result, i=i, array=mem_array)
+            layers.less_than(x=i, y=array_len, cond=cond)
+        sum_result = layers.array_read(mem_array, i=array_len)
+
+        cpu = core.CPUPlace()
+        exe = Executor(cpu)
+        d = []
+
+        for i in xrange(3):
+            d.append(numpy.random.random(size=[10]).astype('float32'))
+
+        d_tensor = []
+        for item in d:
+            t = core.LoDTensor()
+            t.set(item, cpu)
+            d_tensor.append(t)
+
+        outs = map(numpy.array,
+                   exe.run(feed={
+                       'd0': d_tensor[0],
+                       'd1': d_tensor[1],
+                       'd2': d_tensor[2]
+                   },
+                           fetch_list=[sum_result]))
+        self.assertAlmostEqual(numpy.sum(d), numpy.sum(outs[0]), delta=0.01)
+
+
+if __name__ == '__main__':
+    unittest.main()

python/paddle/v2/framework/tests/test_word2vec.py

@@ -3,7 +3,7 @@ import paddle.v2.framework.layers as layers
 import paddle.v2.framework.core as core
 import paddle.v2.framework.optimizer as optimizer
 
-from paddle.v2.framework.framework import Program, g_main_program
+from paddle.v2.framework.framework import Program
 from paddle.v2.framework.executor import Executor
 
 import numpy as np

python/paddle/v2/image.py

-import numpy as np
-try:
-    import cv2
-except ImportError:
-    cv2 = None
-import os
-import tarfile
-import cPickle
-
-__all__ = [
-    "load_image_bytes", "load_image", "resize_short", "to_chw", "center_crop",
-    "random_crop", "left_right_flip", "simple_transform", "load_and_transform",
-    "batch_images_from_tar"
-]
 """
 This file contains some common interfaces for image preprocess.
 Many users are confused about the image layout. We introduce
 the image layout as follows.
 
 - CHW Layout
+
   - The abbreviations: C=channel, H=Height, W=Width
   - The default layout of image opened by cv2 or PIL is HWC.
     PaddlePaddle only supports the CHW layout. And CHW is simply
     a transpose of HWC. It must transpose the input image.
 
 - Color format: RGB or BGR
+
   OpenCV use BGR color format. PIL use RGB color format. Both
   formats can be used for training. Noted that, the format should
   be keep consistent between the training and inference peroid.
 """
+import numpy as np
+try:
+    import cv2
+except ImportError:
+    cv2 = None
+import os
+import tarfile
+import cPickle
+
+__all__ = [
+    "load_image_bytes", "load_image", "resize_short", "to_chw", "center_crop",
+    "random_crop", "left_right_flip", "simple_transform", "load_and_transform",
+    "batch_images_from_tar"
+]
 
 
 def batch_images_from_tar(data_file,
@@ -36,17 +38,18 @@ def batch_images_from_tar(data_file,
                           num_per_batch=1024):
     """
     Read images from tar file and batch them into batch file.
-    param data_file: path of image tar file
-    type data_file: string
-    param dataset_name: 'train','test' or 'valid'
-    type dataset_name: string
-    param img2label: a dic with image file name as key 
+
+    :param data_file: path of image tar file
+    :type data_file: string
+    :param dataset_name: 'train','test' or 'valid'
+    :type dataset_name: string
+    :param img2label: a dic with image file name as key 
                     and image's label as value
-    type img2label: dic
-    param num_per_batch: image number per batch file
-    type num_per_batch: int
-    return: path of list file containing paths of batch file
-    rtype: string
+    :type img2label: dic
+    :param num_per_batch: image number per batch file
+    :type num_per_batch: int
+    :return: path of list file containing paths of batch file
+    :rtype: string
     """
     batch_dir = data_file + "_batch"
     out_path = "%s/%s" % (batch_dir, dataset_name)
@@ -99,14 +102,16 @@ def load_image_bytes(bytes, is_color=True):
     Example usage:
     
     .. code-block:: python
+
         with open('cat.jpg') as f:
             im = load_image_bytes(f.read())
 
     :param bytes: the input image bytes array.
-    :type file: str
+    :type bytes: str
     :param is_color: If set is_color True, it will load and
                      return a color image. Otherwise, it will
                      load and return a gray image.
+    :type is_color: bool
     """
     flag = 1 if is_color else 0
     file_bytes = np.asarray(bytearray(bytes), dtype=np.uint8)
@@ -121,6 +126,7 @@ def load_image(file, is_color=True):
     Example usage:
     
     .. code-block:: python
+
         im = load_image('cat.jpg')
 
     :param file: the input image path.
@@ -128,6 +134,7 @@ def load_image(file, is_color=True):
     :param is_color: If set is_color True, it will load and
                      return a color image. Otherwise, it will
                      load and return a gray image.
+    :type is_color: bool
     """
     # cv2.IMAGE_COLOR for OpenCV3
     # cv2.CV_LOAD_IMAGE_COLOR for older OpenCV Version
@@ -147,6 +154,7 @@ def resize_short(im, size):
     Example usage:
     
     .. code-block:: python
+
         im = load_image('cat.jpg')
         im = resize_short(im, 256)
     
@@ -175,6 +183,7 @@ def to_chw(im, order=(2, 0, 1)):
     Example usage:
     
     .. code-block:: python
+
         im = load_image('cat.jpg')
         im = resize_short(im, 256)
         im = to_chw(im)
@@ -196,6 +205,7 @@ def center_crop(im, size, is_color=True):
     Example usage:
     
     .. code-block:: python
+
         im = center_crop(im, 224)
     
     :param im: the input image with HWC layout.
@@ -223,6 +233,7 @@ def random_crop(im, size, is_color=True):
     Example usage:
     
     .. code-block:: python
+
         im = random_crop(im, 224)
     
     :param im: the input image with HWC layout.
@@ -251,6 +262,7 @@ def left_right_flip(im):
     Example usage:
     
     .. code-block:: python
+
         im = left_right_flip(im)
     
     :paam im: input image with HWC layout
@@ -275,6 +287,7 @@ def simple_transform(im,
     Example usage:
     
     .. code-block:: python
+
         im = simple_transform(im, 256, 224, True)
 
     :param im: The input image with HWC layout.
@@ -285,6 +298,11 @@ def simple_transform(im,
     :type crop_size: int
     :param is_train: Whether it is training or not.
     :type is_train: bool
+    :param is_color: whether the image is color or not.
+    :type is_color: bool
+    :param mean: the mean values, which can be element-wise mean values or 
+                 mean values per channel.
+    :type mean: numpy array | list
     """
     im = resize_short(im, resize_size)
     if is_train:
@@ -324,6 +342,7 @@ def load_and_transform(filename,
     Example usage:
     
     .. code-block:: python
+
         im = load_and_transform('cat.jpg', 256, 224, True)
 
     :param filename: The file name of input image.
@@ -334,6 +353,11 @@ def load_and_transform(filename,
     :type crop_size: int
     :param is_train: Whether it is training or not.
     :type is_train: bool
+    :param is_color: whether the image is color or not.
+    :type is_color: bool
+    :param mean: the mean values, which can be element-wise mean values or 
+                 mean values per channel.
+    :type mean: numpy array | list
     """
     im = load_image(filename)
     im = simple_transform(im, resize_size, crop_size, is_train, is_color, mean)

python/paddle/v2/optimizer.py

@@ -102,7 +102,7 @@ class Momentum(Optimizer):
 
     ..  math::
 
-        v_{t} &= k * v_{t-1} - \\gamma_t / (g_{t} + \\lambda w_{t-1}) \\\\
+        v_{t} &= k * v_{t-1} - \\gamma_t (g_{t} + \\lambda w_{t-1}) \\\\
         w_{t} &= w_{t-1} + v_{t} \\\\
 
     where, :math:`k` is momentum, :math:`\\lambda` is decay rate,