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

.travis.yml

@@ -31,7 +31,7 @@ script:
     if [[ "$JOB" != "doc" ]]; then exit 0; fi;
     # For document only
     if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]; then exit 0; fi;
-    if [[ "$TRAVIS_BRANCH" != "develop"  && ! "$TRAVIS_BRANCH" =~ ^v[[:digit:]]+\.[[:digit:]]+(\.[[:digit:]]+)?(-\S*)?$ ]]; then exit 0; fi;
+    if [[ "$TRAVIS_BRANCH" != "develop"  && ! "$TRAVIS_BRANCH" =~ ^v|release/[[:digit:]]+\.[[:digit:]]+(\.[[:digit:]]+)?(-\S*)?$ ]]; then exit 0; fi;
     export DEPLOY_DOCS_SH=https://raw.githubusercontent.com/PaddlePaddle/PaddlePaddle.org/master/scripts/deploy/deploy_docs.sh
     export DOCS_DIR=`pwd`
     cd ..

Dockerfile

@@ -23,7 +23,7 @@ ENV HOME /root
 COPY ./paddle/scripts/docker/root/ /root/
 
 RUN apt-get update && \
-    apt-get install -y --allow-downgrades \
+    apt-get install -y --allow-downgrades patchelf \
     git python-pip python-dev python-opencv openssh-server bison \
     libnccl2=2.1.2-1+cuda8.0 libnccl-dev=2.1.2-1+cuda8.0 \
     wget unzip unrar tar xz-utils bzip2 gzip coreutils ntp \

cmake/external/anakin.cmake

@@ -7,7 +7,17 @@ set(ANAKIN_INSTALL_DIR "${THIRD_PARTY_PATH}/install/anakin" CACHE PATH
 set(ANAKIN_INCLUDE "${ANAKIN_INSTALL_DIR}" CACHE STRING "root of Anakin header files")
 set(ANAKIN_LIBRARY "${ANAKIN_INSTALL_DIR}" CACHE STRING "path of Anakin library")
 
-set(ANAKIN_COMPILE_EXTRA_FLAGS -Wno-error=unused-variable -Wno-error=format-extra-args -Wno-error=comment -Wno-error=format -Wno-error=switch -Wno-error=return-type -Wno-error=non-virtual-dtor -Wno-reorder -Wno-error=cpp)
+set(ANAKIN_COMPILE_EXTRA_FLAGS 
+    -Wno-error=unused-variable -Wno-unused-variable 
+    -Wno-error=format-extra-args -Wno-format-extra-args
+    -Wno-error=comment -Wno-comment 
+    -Wno-error=format -Wno-format 
+    -Wno-error=switch -Wno-switch
+    -Wno-error=return-type -Wno-return-type 
+    -Wno-error=non-virtual-dtor -Wno-non-virtual-dtor
+    -Wno-sign-compare
+    -Wno-reorder 
+    -Wno-error=cpp)
 
 set(ANAKIN_LIBRARY_URL "https://github.com/pangge/Anakin/releases/download/3.0/anakin_release_simple.tar.gz")
 

cmake/generic.cmake

@@ -257,8 +257,8 @@ function(cc_test TARGET_NAME)
     set(multiValueArgs SRCS DEPS ARGS)
     cmake_parse_arguments(cc_test "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
     add_executable(${TARGET_NAME} ${cc_test_SRCS})
-    target_link_libraries(${TARGET_NAME} ${cc_test_DEPS} paddle_gtest_main memory gtest gflags glog)
-    add_dependencies(${TARGET_NAME} ${cc_test_DEPS} paddle_gtest_main memory gtest gflags glog)
+    target_link_libraries(${TARGET_NAME} ${cc_test_DEPS} paddle_gtest_main lod_tensor memory gtest gflags glog)
+    add_dependencies(${TARGET_NAME} ${cc_test_DEPS} paddle_gtest_main lod_tensor memory gtest gflags glog)
     add_test(NAME ${TARGET_NAME}
              COMMAND ${TARGET_NAME} ${cc_test_ARGS}
              WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
@@ -324,8 +324,8 @@ function(nv_test TARGET_NAME)
     set(multiValueArgs SRCS DEPS)
     cmake_parse_arguments(nv_test "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
     cuda_add_executable(${TARGET_NAME} ${nv_test_SRCS})
-    target_link_libraries(${TARGET_NAME} ${nv_test_DEPS} paddle_gtest_main memory gtest gflags glog)
-    add_dependencies(${TARGET_NAME} ${nv_test_DEPS} paddle_gtest_main memory gtest gflags glog)
+    target_link_libraries(${TARGET_NAME} ${nv_test_DEPS} paddle_gtest_main lod_tensor memory gtest gflags glog)
+    add_dependencies(${TARGET_NAME} ${nv_test_DEPS} paddle_gtest_main lod_tensor memory gtest gflags glog)
     add_test(${TARGET_NAME} ${TARGET_NAME})
     if (nv_test_SERIAL)
         set_property(TEST ${TARGET_NAME} PROPERTY SERIAL 1)

cmake/version.cmake

 # Get the latest git tag.
 set(PADDLE_VERSION $ENV{PADDLE_VERSION})
 set(tmp_version "HEAD")
+set(TAG_VERSION_REGEX "[0-9]+\\.[0-9]+\\.[0-9]+(\\.(a|b|rc)\\.[0-9]+)?")
+set(COMMIT_VERSION_REGEX "[0-9a-f]+[0-9a-f]+[0-9a-f]+[0-9a-f]+[0-9a-f]+")
 while ("${PADDLE_VERSION}" STREQUAL "")
   execute_process(
-    COMMAND ${GIT_EXECUTABLE} describe --tags --abbrev=0 ${tmp_version}
+    COMMAND ${GIT_EXECUTABLE} describe --tags --abbrev=0 --always ${tmp_version}
     WORKING_DIRECTORY ${PADDLE_SOURCE_DIR}
     OUTPUT_VARIABLE GIT_TAG_NAME
     RESULT_VARIABLE GIT_RESULT
     ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
   if (NOT ${GIT_RESULT})
     # Check the tag is a correct version
-    if (${GIT_TAG_NAME} MATCHES "v[0-9]+\\.[0-9]+\\.[0-9]+(\\.(a|b|rc)\\.[0-9]+)?")
+    if (${GIT_TAG_NAME} MATCHES "${COMMIT_VERSION_REGEX}")
+      # if no tag was found, set PADDLE_VERSION to latest
+      set(PADDLE_VERSION "latest")
+    elseif (${GIT_TAG_NAME} MATCHES "v${TAG_VERSION_REGEX}")
       string(REPLACE "v" "" PADDLE_VERSION ${GIT_TAG_NAME})
     else()  # otherwise, get the previous git tag name.
       set(tmp_version "${GIT_TAG_NAME}~1")

doc/fluid/api/transpiler.rst

@@ -14,6 +14,15 @@ DistributeTranspiler
     :members:
     :noindex:
 
+.. _api_fluid_transpiler_InferenceTranspiler:
+
+InferenceTranspiler
+-------------------
+
+..  autoclass:: paddle.fluid.transpiler.InferenceTranspiler
+    :members:
+    :noindex:
+
 .. _api_fluid_transpiler_memory_optimize:
 
 memory_optimize

doc/fluid/design/dist_train/dist_train_nccl2.md

+# Distributed Training with NCCL2
+
+We design a pattern that can enable training with `ParallelExecutor` and
+using [NCCL2](https://developer.nvidia.com/nccl) as it's collective
+communication library.
+
+In `ParallelExecutor` we can use `AllReduce` or `Reduce` and `Broadcast`
+to do multi GPU training. And if we initialize NCCL2 communicators as
+ranks in a distributed environment, we can simply run the `ParallelExecutor`
+as a distributed program! The only thing that may be different than in
+the single node version is that we need to broadcast the NCCL unique ID
+to all the nodes, and initialize communicators using that ID, so NCCL2
+will know each other as ranks.
+
+To achieve this feature, we introduce a new operator: `gen_nccl_id` op,
+so we are ***not*** "bind to" running NCCL2 with MPI, we can run it in
+what ever platform you like.
+
+It have two running modes:
+
+1. Generate and broadcast mode, which should be used on trainer 0;
+1. Listen and fetch mode, which should be used on trainers other than 0.
+
+In both two modes, this op can save the NCCL ID into current scope as a
+persistable variable, Then we can insert this op at the end of
+"startup program" of fluid, so that all workers can get the same ID to
+initialize NCCL communicator objects.
+
+<img src="src/ncc2_design.png">
+
+The above figure indicates the general process when training with NCCL2
+distributed. Each trainer have the number of communicators equal to the
+number of GPUs, but the ranks should match the global ranks number: here
+we have total 8 GPUs, so `nranks==8`, for each trainer, the ranks should
+be from 0 ~ 3 on trainer 0 and 4 ~ 7 on trainer 1.

doc/fluid/design/dist_train/distributed_lookup_table_design.md

 # Design Doc: Distributed Lookup Table Operator
 
-A lookup table operator in PaddlePaddle where the table could be out
+A distribute lookup table operator in PaddlePaddle where the table could be out
 of the memory of a computer.
 
 ## Background
@@ -24,14 +24,14 @@ memory, so we'd need a distributed storage service, which supports the
 lookup of rows.
 
 The following figure illustrates the multiplication of x with two
-non-zero elements, or say, two symbols, and a lookup table W:
+non-zero elements, or say two symbols, and a lookup table W:
 
 ![lookup table](./src/lookup_table.png)
 
 ### The Backward Algorithm
 
 The backward algorithm computes W'(x) using W(x).  W'(x) has the same
-scale of size as W(x) and is much smaller than W.
+the scale of size as W(x) and is much smaller than W.
 
 To optimize W given W', we can do simple SGD update:
 
@@ -44,85 +44,46 @@ $$W = f(W, W')$$
 The following figure illustrates the backward pass of the lookup
 operator: ![lookup table training](./src/lookup_table_training.png)
 
-## Distributed Storage Service
-
-The forward algorithm requires a distributed storage service for W.
-The backward algorithm prefers that the storage system can apply the
-optimization algorithm on W.  The following two sections describe two
-solutions -- the former doesn't require that the storage service can
-do optimization, the latter does.
-
-### Storage Service Doesn't Optimize
-
-In this design, we use highly-optimized distributed storage, e.g.,
-memcached, as the storage service, and we run the optimization
-algorithm on parameter servers of PaddlePaddle.  The following figure
-illustrates the training process.
-
-<!--
-Note: please update the following URL when update this digraph.
-<img src='https://g.gravizo.com/svg?
-digraph G {
-  rankdir="LR";
-  subgraph cluster1 {
-  P1 [label="pserver 1"];
-  P2 [label="pserver 2"];
-  T1 [label="trainer 1"];
-  T2 [label="trainer 2"];
-  T3 [label="trainer 3"];
-  }
-  KV [label="memcached"];
-  T1 -> P1;
-  T1 -> P2;
-  T2 -> P1;
-  T2 -> P2;
-  T3 -> P1;
-  T3 -> P2;
-  P1 -> KV [color=gray, weight=0.1];
-  KV -> P1 [color=gray, weight=0.1];
-  P2 -> KV [color=gray, weight=0.1];
-  KV -> P2 [color=gray, weight=0.1];
-  KV -> T1 [color=gray, weight=0.1];
-  KV -> T2 [color=gray, weight=0.1];
-  KV -> T3 [color=gray, weight=0.1];
-}
-)
-'/>
--->
-
-<img src='https://g.gravizo.com/svg?%20digraph%20G%20{%20rankdir=%22LR%22;%20subgraph%20cluster1%20{%20P1%20[label=%22pserver%201%22];%20P2%20[label=%22pserver%202%22];%20T1%20[label=%22trainer%201%22];%20T2%20[label=%22trainer%202%22];%20T3%20[label=%22trainer%203%22];%20}%20KV%20[label=%22memcached%22];%20T1%20-%3E%20P1;%20T1%20-%3E%20P2;%20T2%20-%3E%20P1;%20T2%20-%3E%20P2;%20T3%20-%3E%20P1;%20T3%20-%3E%20P2;%20P1%20-%3E%20KV%20[color=gray,%20weight=0.1];%20KV%20-%3E%20P1%20[color=gray,%20weight=0.1];%20P2%20-%3E%20KV%20[color=gray,%20weight=0.1];%20KV%20-%3E%20P2%20[color=gray,%20weight=0.1];%20KV%20-%3E%20T1%20[color=gray,%20weight=0.1];%20KV%20-%3E%20T2%20[color=gray,%20weight=0.1];%20KV%20-%3E%20T3%20[color=gray,%20weight=0.1];%20}'/>
-
-Each trainer runs the forward and backward passes using their local
-data:
-
-1. In the forward pass, when a trainer runs the forward algorithm of a
-   lookup operator, it retrieves W(x) from the storage service.
-1. The trainer computes W'(x) in the backward pass using W(x).
-
-During the global update process:
-
-1. Each trainer uploads its W'(x) to parameter servers.
-1. The parameter server runs the optimization algorithm, e.g., the
-   Adam optimization algorithm, which requires that
-   1. The parameter server retrieves W(x) from memcached, and
-   1. The parameter server pushes $\Delta W(x)=f(W(x), lambda \sum_j
-      W'(x))$ to memcached, where $f$ denotes the optimization
-      algorithm.
-
-### Storage Service Does Optimize
-
-This design is very similar to the above one, except that the
-optimization algorithm $f$ runs on the storage service.
-
-- Pro: parameter servers do not retrieve W(x) from the storage
-  service, thus saves half network communication.
-- Con: the storage service needs to be able to run the optimization
-  algorithm.
-
-## Conclusion
-
-Let us do the "storage service does not optimize" solution first, as a
-baseline at least, because it is easier to use a well-optimized
-distributed storage service like memcached.  We can do the "storage
-service does optimize" solution later or at the same time, which, if
-implemented carefully, should have better performance than the former.
+## Distributed Lookup Table
+### Problem 1: The lookup table may be very large.
+
+ In the condition like the search engine and recommendation system, the number of feature Id may be very large, say 100,000,000,000, then for a float value lookup table of size 8, the total size of the table is:
+
+ ```
+ 100,000,000,000 * 8 * 4(Bytes) = 2980.23 GB
+ ```
+
+### Solution: Distributed storage
+
+1. Paddle use [SelectedRows](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/fluid/design/modules/selected_rows.md) as the storage format for the lookup table, the lookup table parameter will be split to multi-machine according to the hash of the feature ID, and data will also be split and send to the same machine to prefetch the parameter.
+
+1. For common parameters, the trainer will get the whole parameter for training, but for the big lookup table, the trainer can not store the whole parameter. Because the input data feature is very sparse, every time we only need a few parameters for training, so we use `prefetch_op` to only prefetch the parameter needed to trainer.
+
+### Problem 2. The Id in the lookup table is not sure before training.
+
+ The feature Id is calculated by the hash function because the feature data source is so large, we can not get all the Id before training. So we can not initialize the table before training.
+
+### Solution: Id auto growth
+
+At the beginning of training, paddle only malloc the memory for the lookup table at parameter server side, the Id and it's value will not be initialized. During training, when a parameter server received an Id, if it is already in the lookup table, it will return the existing parameter, if the Id does not exist, paddle will add it into the lookup table and initialize the value for it.
+
+### Problem 3: parameter load and save
+
+For common parameters, paddle use trainer to save and load them. But for distributed lookup table, trainer cannot do this because it's large size.
+
+### Solution: Parameter server side save and load
+
+Paddle support parameter server side save and load for distribute lookup table. Each machine of parameter servers will only save and load part of the whole table.
+
+## Architecture
+The whole architecture of the distribute lookup table is as below:
+
+### Training steps:
+1. Read a batch of data, the data is feature ids.
+1. The input ids will be split by `split_ids_op` with the same hash function of the lookup table.
+1. The `prefetch_op` use the split result to prefetch parameters back from the lookup table.
+1. Run forward-backward to get the gradient of the lookup table.
+1. `split_ids_op` split the gradient and then use `send_op` to the parameter server.
+1. parameter server update the table with the received gradient.
+
+![distribute lookup table](./src/distributed_lookup_table.jpeg)

doc/v2/howto/capi/workflow_of_capi_cn.md

@@ -28,9 +28,9 @@
 
 ### 准备预测模型
 
-准备预测模型部分，我们以手写数字识别任务为例进行介绍。手写数字识别任务定义了一个含有[两个隐层的简单全连接网络](https://github.com/PaddlePaddle/book/blob/develop/02.recognize_digits/README.cn.md#softmax回归softmax-regression)，网络接受一幅图片作为输入，将图片分类到 0 ~ 9 类别标签之一。完整代码可以查看[此目录](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/capi/examples/model_inference/dense) 中的相关脚本。
+准备预测模型部分，我们以手写数字识别任务为例进行介绍。手写数字识别任务定义了一个含有[两个隐层的简单全连接网络](https://github.com/PaddlePaddle/book/blob/develop/02.recognize_digits/README.cn.md#softmax回归softmax-regression)，网络接受一幅图片作为输入，将图片分类到 0 ~ 9 类别标签之一。完整代码可以查看[此目录](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/legacy/capi/examples/model_inference/dense) 中的相关脚本。
 
-调用C-API开发预测程序需要一个训练好的模型，运行[MNIST手写数字识别目录](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/capi/examples/model_inference/dense)下的[mnist_v2.py](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/capi/examples/model_inference/dense/mnist_v2.py)脚本，在终端执行`python mnist_v2.py`，会使用 PaddlePaddle 内置的 [MNIST 数据集](http://yann.lecun.com/exdb/mnist/)进行训练。训练好的模型默认保存在当前运行目录下的`models`目录中。
+调用C-API开发预测程序需要一个训练好的模型，运行[MNIST手写数字识别目录](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/legacy/capi/examples/model_inference/dense)下的[mnist_v2.py](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/legacy/capi/examples/model_inference/dense/mnist_v2.py)脚本，在终端执行`python mnist_v2.py`，会使用 PaddlePaddle 内置的 [MNIST 数据集](http://yann.lecun.com/exdb/mnist/)进行训练。训练好的模型默认保存在当前运行目录下的`models`目录中。
 
 下面，我们将训练结束后存储下来的模型转换成预测模型。
 
@@ -48,7 +48,7 @@
     dump_v2_config(predict, "trainer_config.bin", True)
     ```
 
-    对[手写数字识别](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/capi/examples/model_inference/dense)这个示例，[`mnist_v2.py`](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/capi/examples/model_inference/dense/mnist_v2.py)脚本集成了序列化神经网络结构的过程，可以直接运行 `python mnist_v2.py --task dump_config` 对神经网络结构进行序列化，结果会写入当前运行目录下的`trainer_config.bin`文件中。
+    对[手写数字识别](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/legacy/capi/examples/model_inference/dense)这个示例，[`mnist_v2.py`](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/legacy/capi/examples/model_inference/dense/mnist_v2.py)脚本集成了序列化神经网络结构的过程，可以直接运行 `python mnist_v2.py --task dump_config` 对神经网络结构进行序列化，结果会写入当前运行目录下的`trainer_config.bin`文件中。
 
     使用这种方式，需要**在运行时将神经网络的多个可学习参数放在同一个目录中**，C-API可以通过分别指定序列化后的网络结构文件和参数目录来加载训练好的模型。
 
@@ -68,7 +68,7 @@
     merge_v2_model(net, param_file, output_file)
     ```
 
-    对[手写数字识别](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/capi/examples/model_inference/dense)这个示例，可直接运行 `python` [merge_v2_model.py](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/capi/examples/model_inference/dense/merge_v2_model.py)。序列化结果会写入当前运行目录下的`output.paddle.model`文件中。使用这种方式，运行时C-API可以通过指定`output.paddle.model`文件的路径来加载预测模型。
+    对[手写数字识别](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/legacy/capi/examples/model_inference/dense)这个示例，可直接运行 `python` [merge_v2_model.py](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/legacy/capi/examples/model_inference/dense/merge_v2_model.py)。序列化结果会写入当前运行目录下的`output.paddle.model`文件中。使用这种方式，运行时C-API可以通过指定`output.paddle.model`文件的路径来加载预测模型。
 
 #### 注意事项
 1. 为使用C-API，在调用`dump_v2_config`序列化神经网络结构时，参数`binary`必须指定为`True`。
@@ -77,10 +77,10 @@
 
 ### 编写预测代码
 
-预测代码更多详细示例代码请参考[C-API使用示例](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/capi/examples/model_inference) 目录下的代码示例。这一节对图1中预测代码编写的5个步骤进行介绍和说明。
+预测代码更多详细示例代码请参考[C-API使用示例](https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/legacy/capi/examples/model_inference) 目录下的代码示例。这一节对图1中预测代码编写的5个步骤进行介绍和说明。
 
 #### step 1. 初始化PaddlePaddle运行环境
-第一步需调用[`paddle_init`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/capi/main.h#L27) 初始化PaddlePaddle运行环境，该接口接受两个参数：参数的个数和参数列表。
+第一步需调用[`paddle_init`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/legacy/capi/main.h#L27) 初始化PaddlePaddle运行环境，该接口接受两个参数：参数的个数和参数列表。
 
 #### step2. 加载模型
 
@@ -88,8 +88,8 @@
 
 概念上，在 PaddlePaddle 内部，一个GradientMachine类的对象管理着一组计算层（PaddlePaddle Layers）来完成前向和反向计算，并处理与之相关的所有细节。在调用C-API预测时，只需进行前向计算而无需调用反向计算。这篇文档之后部分会使用`gradient machine`来特指调用PaddlePaddle C-API创建的GradientMachine类的对象。每一个 `gradient machine` 都会管理维护一份训练好的模型，下面是C-API提供的，两种常用的模型加载方式：
 
-1. 调用[`paddle_gradient_machine_load_parameter_from_disk`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/capi/gradient_machine.h#L61)接口，从磁盘加载预测模型。这时`gradient machine`会独立拥有一份训练好的模型；
-1. 调用[`paddle_gradient_machine_create_shared_param`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/capi/gradient_machine.h#L88)接口，与其它`gradient machine`的共享已经加载的预测模型。这种情况多出现在使用多线程预测时，通过多个线程共享同一个模型来减少内存开销。可参考[此示例](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/capi/examples/model_inference/multi_thread/main.c)。
+1. 调用[`paddle_gradient_machine_load_parameter_from_disk`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/legacy/capi/gradient_machine.h#L61)接口，从磁盘加载预测模型。这时`gradient machine`会独立拥有一份训练好的模型；
+1. 调用[`paddle_gradient_machine_create_shared_param`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/legacy/capi/gradient_machine.h#L88)接口，与其它`gradient machine`的共享已经加载的预测模型。这种情况多出现在使用多线程预测时，通过多个线程共享同一个模型来减少内存开销。可参考[此示例](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/legacy/capi/examples/model_inference/multi_thread/main.c)。
 
 - 注意事项
 
@@ -117,7 +117,7 @@ C-API支持的所有输入数据类型和他们的组织方式，请参考“输
 
 #### step 4. 前向计算
 
-完成上述准备之后，通过调用 [`paddle_gradient_machine_forward`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/capi/gradient_machine.h#L73) 接口完成神经网络的前向计算。
+完成上述准备之后，通过调用 [`paddle_gradient_machine_forward`](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/legacy/capi/gradient_machine.h#L73) 接口完成神经网络的前向计算。
 
 #### step 5. 清理
 

paddle/contrib/inference/CMakeLists.txt

@@ -46,9 +46,14 @@ cc_library(paddle_inference_api
     SRCS paddle_inference_api.cc paddle_inference_api_impl.cc
     DEPS ${FLUID_CORE_MODULES} ${GLOB_OP_LIB})
 
+# Here the shared library doesn't depend on other fluid libraries, or double free will occur.
 cc_library(paddle_inference_api_shared SHARED
-    SRCS paddle_inference_api.cc paddle_inference_api_impl.cc
-    DEPS ${FLUID_CORE_MODULES} ${GLOB_OP_LIB})
+    SRCS paddle_inference_api.cc paddle_inference_api_impl.cc)
+set_target_properties(paddle_inference_api_shared PROPERTIES OUTPUT_NAME paddle_inference_api)
+if(NOT APPLE)
+  set(LINK_FLAGS "-fPIC -fvisibility=hidden")
+  set_target_properties(paddle_inference_api_shared PROPERTIES LINK_FLAGS "${LINK_FLAGS}")
+endif()
 
 cc_test(test_paddle_inference_api
         SRCS test_paddle_inference_api.cc

paddle/contrib/inference/paddle_inference_api.cc

@@ -23,7 +23,6 @@ int PaddleDtypeSize(PaddleDType dtype) {
     case PaddleDType::INT64:
       return sizeof(int64_t);
     default:
-      //
       assert(false);
       return -1;
   }

paddle/contrib/inference/paddle_inference_api_impl.h

@@ -22,9 +22,9 @@
 #include "paddle/contrib/inference/paddle_inference_api.h"
 
 #include "paddle/fluid/framework/ddim.h"
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/inference/io.h"
+#include "paddle/fluid/platform/init.h"
 #include "paddle/fluid/platform/profiler.h"
 
 namespace paddle {

paddle/contrib/inference/test_paddle_inference_api_impl.cc

@@ -249,7 +249,7 @@ void MainThreadsImageClassification(bool use_gpu) {
       const size_t len = local_outputs[0].data.length();
       float* data = static_cast<float*>(local_outputs[0].data.data());
       float* ref_data = refs[tid].data<float>();
-      EXPECT_EQ(refs[tid].numel(), len / sizeof(float));
+      EXPECT_EQ((size_t)refs[tid].numel(), len / sizeof(float));
       for (int i = 0; i < refs[tid].numel(); ++i) {
         EXPECT_NEAR(ref_data[i], data[i], 1e-3);
       }

paddle/fluid/framework/CMakeLists.txt

@@ -21,12 +21,13 @@ endif()
 
 cc_test(eigen_test SRCS eigen_test.cc DEPS tensor)
 
-nv_test(mixed_vector_test SRCS mixed_vector_test.cu DEPS place memory device_context init)
+nv_test(mixed_vector_test SRCS mixed_vector_test.cu DEPS place memory device_context tensor)
 cc_library(lod_tensor SRCS lod_tensor.cc DEPS ddim place tensor framework_proto recordio)
 cc_test(lod_tensor_test SRCS lod_tensor_test.cc DEPS lod_tensor memory)
-nv_test(lod_tensor_gpu_test SRCS lod_tensor_test.cu DEPS lod_tensor init)
+nv_test(lod_tensor_gpu_test SRCS lod_tensor_test.cu DEPS lod_tensor)
 
 cc_library(reader SRCS reader.cc DEPS lod_tensor ddim)
+cc_test(reader_test SRCS reader_test.cc DEPS reader)
 
 cc_test(variable_test SRCS variable_test.cc)
 
@@ -38,7 +39,7 @@ cc_test(scope_test SRCS scope_test.cc DEPS scope)
 
 cc_library(data_device_transform SRCS data_device_transform.cc DEPS tensor)
 nv_test(data_device_transform_test SRCS data_device_transform_test.cu
-        DEPS operator op_registry init math_function)
+        DEPS operator op_registry device_context math_function)
 
 if(WITH_GPU)
   nv_library(data_type_transform SRCS data_type_transform.cu DEPS tensor)
@@ -63,7 +64,7 @@ cc_library(op_info SRCS op_info.cc DEPS attribute framework_proto)
 cc_library(shape_inference SRCS shape_inference.cc DEPS ddim attribute device_context)
 cc_library(operator SRCS operator.cc DEPS op_info device_context tensor scope glog
     shape_inference data_transform lod_tensor profiler)
-cc_test(operator_test SRCS operator_test.cc DEPS operator op_registry init)
+cc_test(operator_test SRCS operator_test.cc DEPS operator op_registry device_context)
 cc_library(proto_desc SRCS var_desc.cc op_desc.cc block_desc.cc program_desc.cc DEPS shape_inference op_info operator glog)
 
 cc_library(op_registry SRCS op_registry.cc DEPS op_proto_maker op_info operator glog proto_desc)
@@ -101,14 +102,14 @@ cc_test(var_type_inference_test SRCS var_type_inference_test.cc DEPS op_registry
 cc_library(selected_rows SRCS selected_rows.cc DEPS tensor)
 cc_test(selected_rows_test SRCS selected_rows_test.cc DEPS selected_rows)
 
-cc_library(init SRCS init.cc DEPS gflags device_context place stringpiece operator)
-cc_test(init_test SRCS init_test.cc DEPS init)
-
 cc_test(op_kernel_type_test SRCS op_kernel_type_test.cc DEPS place device_context framework_proto)
 cc_test(cow_ptr_tests SRCS details/cow_ptr_test.cc)
       
 # cc_test(channel_test SRCS channel_test.cc)
 cc_test(tuple_test SRCS tuple_test.cc )
-cc_test(concurrency_test SRCS concurrency_test.cc DEPS go_op channel_close_op channel_create_op
-        channel_send_op channel_recv_op sum_op select_op elementwise_add_op compare_op
-        conditional_block_op while_op assign_op print_op executor proto_desc)
+
+# disable test temporarily.
+# TODO https://github.com/PaddlePaddle/Paddle/issues/11971
+# cc_test(concurrency_test SRCS concurrency_test.cc DEPS go_op channel_close_op channel_create_op
+#         channel_send_op channel_recv_op sum_op select_op elementwise_add_op compare_op
+#         conditional_block_op while_op assign_op print_op executor proto_desc)

paddle/fluid/framework/data_device_transform_test.cu

@@ -14,13 +14,13 @@ limitations under the License. */
 
 #include "gtest/gtest.h"
 
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/framework/op_info.h"
 #include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/operators/elementwise_op_function.h"
 #include "paddle/fluid/operators/math/math_function.h"
 #include "paddle/fluid/platform/device_context.h"
+#include "paddle/fluid/platform/init.h"
 
 namespace paddle {
 namespace framework {

paddle/fluid/framework/details/build_strategy.h

@@ -34,7 +34,7 @@ struct BuildStrategy {
 
   std::string debug_graphviz_path_{""};
 
-  bool enable_data_balance_{true};
+  bool enable_data_balance_{false};
 };
 
 }  // namespace details

paddle/fluid/framework/details/data_balance_op_handle.cc

@@ -86,9 +86,9 @@ std::vector<std::array<int, 3>> DataBalanceOpHandle::GetBalancePlan(
 }
 
 void DataBalanceOpHandle::RunImpl() {
-  if (places_.size() == 1) {
-    return;
-  }
+  PADDLE_ENFORCE_GT(places_.size(), 1,
+                    "Data balance can only be enabled when the number of "
+                    "places to run larger than 1.");
   auto in_var_handles = DynamicCast<VarHandle>(inputs_);
   auto out_var_handles = DynamicCast<VarHandle>(outputs_);
   PADDLE_ENFORCE(in_var_handles.size() % places_.size() == 0);

paddle/fluid/framework/details/multi_devices_graph_builder.cc

@@ -59,6 +59,11 @@ MultiDevSSAGraphBuilder::MultiDevSSAGraphBuilder(
     grad_names_.insert(GradVarName(p));
   }
   balance_vars_.resize(places_.size(), 0);
+  if (strategy_.enable_data_balance_ && places_.size() == 1) {
+    LOG(WARNING) << "It is no need to enable data balance when there is only "
+                    "one place. enable_data_balance is set to False.";
+    strategy_.enable_data_balance_ = false;
+  }
 }
 
 void MultiDevSSAGraphBuilder::CreateOpHandleIOs(SSAGraph *result,

paddle/fluid/framework/details/scope_buffered_ssa_graph_executor.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "paddle/fluid/framework/details/scope_buffered_ssa_graph_executor.h"
+#include <stdexcept>
 #include <string>
 #include <vector>
 #include "paddle/fluid/framework/executor.h"
@@ -54,7 +55,13 @@ FeedFetchList ScopeBufferedSSAGraphExecutor::Run(
     }
   }
 
-  auto fetch_data = underlying_executor_->Run(fetch_tensors);
+  std::vector<framework::LoDTensor> fetch_data;
+  std::exception_ptr eptr;
+  try {
+    fetch_data = underlying_executor_->Run(fetch_tensors);
+  } catch (...) {
+    eptr = std::current_exception();
+  }
   drop_scope_counter_ += 1;
   if (!fetch_tensors.empty() ||
       drop_scope_counter_ == strategy_.num_iteration_per_drop_scope_) {
@@ -69,7 +76,12 @@ FeedFetchList ScopeBufferedSSAGraphExecutor::Run(
       scope->DeleteScope(local_scope);
     }
   }
+
+  if (eptr) {
+    std::rethrow_exception(eptr);
+  } else {
     return fetch_data;
+  }
 }
 }  // namespace details
 }  // namespace framework

paddle/fluid/framework/details/threaded_ssa_graph_executor.cc

@@ -78,6 +78,9 @@ FeedFetchList ThreadedSSAGraphExecutor::Run(
     set.clear();
   };
 
+  run_op_futures_.clear();
+  exception_.reset();
+
   // Step 3. Execution
   while (!pending_vars.empty()) {
     // 1. Run All Ready ops
@@ -98,6 +101,9 @@ FeedFetchList ThreadedSSAGraphExecutor::Run(
     if (timeout) {
       std::lock_guard<std::mutex> l(exception_mu_);
       if (exception_) {
+        for (auto &run_op_future : run_op_futures_) {
+          run_op_future.wait();
+        }
         std::exception *exp = exception_.get();
         if (dynamic_cast<platform::EOFException *>(exp)) {
           auto e = *static_cast<platform::EOFException *>(exp);
@@ -222,7 +228,7 @@ void ThreadedSSAGraphExecutor::RunOp(
     }
   };
   if (pool_) {
-    pool_->enqueue(op_run);
+    run_op_futures_.emplace_back(pool_->enqueue(op_run));
   } else {
     op_run();
   }

paddle/fluid/framework/details/threaded_ssa_graph_executor.h

@@ -15,6 +15,7 @@
 #pragma once
 
 #include <deque>
+#include <list>
 #include <string>
 #include <unordered_set>
 #include <utility>
@@ -77,6 +78,7 @@ class ThreadedSSAGraphExecutor : public SSAGraphExecutor {
 
  private:
   ExecutionStrategy strategy_;
+  std::list<std::future<void>> run_op_futures_;
 };
 
 }  // namespace details

paddle/fluid/framework/lod_tensor_test.cu

@@ -17,9 +17,9 @@
 #include <stdio.h>
 
 #include "gtest/gtest.h"
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/platform/assert.h"
+#include "paddle/fluid/platform/init.h"
 #include "paddle/fluid/platform/place.h"
 
 __global__ void test(size_t* a, int size) {

paddle/fluid/framework/op_info.cc

@@ -21,8 +21,8 @@ namespace framework {
 // a static local variable is already being initialized.
 // https://stackoverflow.com/questions/11711920/how-to-implement-multithread-safe-singleton-in-c11-without-using-mutex
 OpInfoMap& OpInfoMap::Instance() {
-  static OpInfoMap* g_op_info_map = new OpInfoMap();
-  return *g_op_info_map;
+  static OpInfoMap g_op_info_map;
+  return g_op_info_map;
 }
 }  // namespace framework
 }  // namespace paddle

paddle/fluid/framework/op_registry.h

@@ -186,13 +186,7 @@ struct OpKernelRegistrarFunctorEx<PlaceType, false, I,
   STATIC_ASSERT_GLOBAL_NAMESPACE(                                        \
       __reg_op__##op_type,                                               \
       "REGISTER_OPERATOR must be called in global namespace");           \
-  class _OpClass_##op_type##_ : public op_class {                      \
-   public:                                                             \
-    DEFINE_OP_CLONE_METHOD(_OpClass_##op_type##_);                     \
-    DEFINE_OP_CONSTRUCTOR(_OpClass_##op_type##_, op_class);            \
-  };                                                                   \
-  static ::paddle::framework::OperatorRegistrar<_OpClass_##op_type##_, \
-                                                ##__VA_ARGS__>         \
+  static ::paddle::framework::OperatorRegistrar<op_class, ##__VA_ARGS__> \
       __op_registrar_##op_type##__(#op_type);                            \
   int TouchOpRegistrar_##op_type() {                                     \
     __op_registrar_##op_type##__.Touch();                                \

paddle/fluid/framework/op_registry_test.cc

@@ -193,15 +193,10 @@ TEST(OpRegistry, CustomChecker) {
   ASSERT_EQ(test_attr, 4);
 }
 
-class CosineOpComplete : public paddle::framework::CosineOp {
- public:
-  DEFINE_OP_CONSTRUCTOR(CosineOpComplete, paddle::framework::CosineOp);
-  DEFINE_OP_CLONE_METHOD(CosineOpComplete);
-};
-
 TEST(OperatorRegistrar, Test) {
   paddle::framework::OperatorRegistrar<
-      CosineOpComplete, paddle::framework::CosineOpProtoAndCheckerMaker>
+      paddle::framework::CosineOp,
+      paddle::framework::CosineOpProtoAndCheckerMaker>
       reg("cos");
 }
 

paddle/fluid/framework/operator.cc

@@ -633,6 +633,16 @@ void OperatorWithKernel::RunImpl(const Scope& scope,
   VLOG(3) << "expected_kernel_key:" << expected_kernel_key;
 
   auto kernel_iter = kernels.find(expected_kernel_key);
+#ifdef PADDLE_WITH_MKLDNN
+  // workaround for missing MKLDNN kernel when FLAGS_use_mkldnn env var is set
+  if (kernel_iter == kernels.end() &&
+      expected_kernel_key.library_type_ == LibraryType::kMKLDNN) {
+    VLOG(3) << "missing MKLDNN kernel: fallbacking to PLAIN one";
+    expected_kernel_key.library_type_ = LibraryType::kPlain;
+    expected_kernel_key.data_layout_ = DataLayout::kAnyLayout;
+    kernel_iter = kernels.find(expected_kernel_key);
+  }
+#endif
   if (kernel_iter == kernels.end()) {
     PADDLE_THROW("op %s does not have kernel for %s", type_,
                  KernelTypeToString(expected_kernel_key));

paddle/fluid/framework/operator.h

@@ -121,10 +121,6 @@ class OperatorBase {
   //! Get all outputs variable names
   virtual std::vector<std::string> OutputVars(bool has_intermediate) const;
 
-  // Return a new operator instance, which is as same as this.
-  // Use unique_ptr to prevent caller forget to delete this pointer.
-  virtual std::unique_ptr<OperatorBase> Clone() const = 0;
-
  protected:
   std::string type_;
   // NOTE: in case of OpGrad, inputs_ contains:
@@ -145,37 +141,6 @@ class OperatorBase {
                        const platform::Place& place) const = 0;
 };
 
-// Macro for define a clone method.
-// If you are writing an kernel operator, `Clone` will be defined when you
-// register it. i.e. `Clone` method is not needed to define by yourself.
-#define DEFINE_OP_CLONE_METHOD(cls)                                            \
-  std::unique_ptr<::paddle::framework::OperatorBase> Clone() const final {     \
-    return std::unique_ptr<::paddle::framework::OperatorBase>(new cls(*this)); \
-  }
-
-// Macro for define a default constructor for Operator.
-// You can also use
-//   using PARENT_CLASS::PARENT_CLASS;
-// to use parent's constructor.
-#define DEFINE_OP_CONSTRUCTOR(cls, parent_cls)             \
-  cls(const std::string& type,                             \
-      const ::paddle::framework::VariableNameMap& inputs,  \
-      const ::paddle::framework::VariableNameMap& outputs, \
-      const paddle::framework::AttributeMap& attrs)        \
-      : parent_cls(type, inputs, outputs, attrs) {}
-
-class NOP : public OperatorBase {
- public:
-  using OperatorBase::OperatorBase;
-  std::unique_ptr<OperatorBase> Clone() const override {
-    return std::unique_ptr<OperatorBase>(new NOP(*this));
-  }
-
- private:
-  void RunImpl(const Scope& scope,
-               const platform::Place& place) const override {}
-};
-
 class ExecutionContext {
  public:
   ExecutionContext(const OperatorBase& op, const Scope& scope,

paddle/fluid/framework/operator_test.cc

@@ -13,10 +13,10 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 #include "gtest/gtest.h"
 
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/op_info.h"
 #include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/framework/operator.h"
+#include "paddle/fluid/platform/init.h"
 
 namespace paddle {
 namespace framework {
@@ -247,26 +247,3 @@ TEST(OpKernel, multi_inputs) {
   auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   op->Run(scope, cpu_place);
 }
-
-class OperatorClone : public paddle::framework::OperatorBase {
- public:
-  DEFINE_OP_CLONE_METHOD(OperatorClone);
-  OperatorClone(const std::string& type,
-                const paddle::framework::VariableNameMap& inputs,
-                const paddle::framework::VariableNameMap& outputs,
-                const paddle::framework::AttributeMap& attrs)
-      : OperatorBase(type, inputs, outputs, attrs) {}
-
- private:
-  void RunImpl(const paddle::framework::Scope& scope,
-               const paddle::platform::Place& place) const override {}
-};
-
-TEST(Operator, Clone) {
-  paddle::framework::InitDevices(true);
-  OperatorClone a("ABC", paddle::framework::VariableNameMap{},
-                  paddle::framework::VariableNameMap{},
-                  paddle::framework::AttributeMap{});
-  auto b = a.Clone();
-  ASSERT_EQ(a.Type(), b->Type());
-}

paddle/fluid/framework/reader.cc

@@ -13,29 +13,61 @@
 // limitations under the License.
 
 #include "paddle/fluid/framework/reader.h"
+#include <deque>
 
 namespace paddle {
 namespace framework {
-ReaderBase::~ReaderBase() {}
 
-FileReader::FileReader(const std::vector<DDim> &dims) : dims_(dims) {}
-
-void FileReader::ReadNext(std::vector<LoDTensor> *out) {
+void ReaderBase::ReadNext(std::vector<LoDTensor> *out) {
+  std::lock_guard<std::mutex> lock(mu_);
+  PADDLE_ENFORCE_EQ(status_, ReaderStatus::kRunning);
   ReadNextImpl(out);
-  if (out->empty()) {
-    return;
+}
+
+void ReaderBase::InsertDecoratedReader(
+    const std::shared_ptr<ReaderBase> &decorated_reader) {
+  std::lock_guard<std::mutex> guard(mu_);
+  decorated_readers_.emplace_back(decorated_reader);
+}
+
+std::unordered_set<ReaderBase *> ReaderBase::GetEndPoints() {
+  std::unordered_set<ReaderBase *> result;
+  std::deque<ReaderBase *> queue;
+  queue.emplace_back(this);
+  while (!queue.empty()) {  // BFS search
+    auto *front = queue.front();
+    queue.pop_front();
+    if (front->decorated_readers_.empty()) {
+      result.emplace(front);
+    } else {
+      for (auto &reader : front->decorated_readers_) {
+        if (auto *reader_ptr = reader.lock().get()) {
+          queue.emplace_back(reader_ptr);
+        }
+      }
+    }
   }
 
-  PADDLE_ENFORCE_EQ(out->size(), dims_.size());
-  for (size_t i = 0; i < dims_.size(); ++i) {
-    auto &actual = (*out)[i].dims();
-    auto &expect = dims_[i];
+  return result;
+}
 
-    PADDLE_ENFORCE_EQ(actual.size(), expect.size());
-    for (int j = 0; j < actual.size(); ++j) {
-      //      PADDLE_ENFORCE(actual[i] == expect[i] || expect[i] == -1);
+void ReaderBase::Shutdown() {
+  std::lock_guard<std::mutex> lock(mu_);
+  if (status_ != ReaderStatus::kStopped) {
+    ShutdownImpl();
+    status_ = ReaderStatus::kStopped;
   }
+}
+
+void ReaderBase::Start() {
+  std::lock_guard<std::mutex> lock(mu_);
+  if (status_ != ReaderStatus::kRunning) {
+    StartImpl();
+    status_ = ReaderStatus::kRunning;
   }
 }
+
+ReaderBase::~ReaderBase() { Shutdown(); }
+
 }  // namespace framework
 }  // namespace paddle

paddle/fluid/framework/reader.h

@@ -15,6 +15,7 @@
 #pragma once
 
 #include <memory>
+#include <unordered_set>
 #include <vector>
 
 #include "paddle/fluid/framework/ddim.h"
@@ -24,61 +25,116 @@
 namespace paddle {
 namespace framework {
 
+enum ReaderStatus { kRunning, kStopped };
+
 class ReaderBase {
  public:
-  virtual void ReadNext(std::vector<LoDTensor>* out) = 0;
+  virtual void ReadNext(std::vector<LoDTensor>* out);
+
+  virtual void Shutdown();
 
-  virtual void ReInit() = 0;
+  virtual void Start();
+
+  // Return the readers which are the end of decorating chain. Basically
+  // they are readers just before read op.
+  std::unordered_set<ReaderBase*> GetEndPoints();
 
   virtual ~ReaderBase();
+
+ protected:
+  virtual void ReadNextImpl(std::vector<LoDTensor>* out) {}
+
+  virtual void ShutdownImpl() {}
+
+  virtual void StartImpl() {}
+
+  ReaderStatus status_{kRunning};
+
+  mutable std::mutex mu_;
+
+ private:
+  friend class DecoratedReader;
+  // These methods can be only invoked inside DecoratedReader to record the
+  // decorating chain.
+  void InsertDecoratedReader(
+      const std::shared_ptr<ReaderBase>& decorated_reader);
+  // A set of which readers that decorated this reader.
+  std::vector<std::weak_ptr<ReaderBase>> decorated_readers_;
 };
 
-class DecoratedReader : public ReaderBase {
+class DecoratedReader : public ReaderBase,
+                        public std::enable_shared_from_this<DecoratedReader> {
  public:
   explicit DecoratedReader(const std::shared_ptr<ReaderBase>& reader)
       : ReaderBase(), reader_(reader) {
     PADDLE_ENFORCE_NOT_NULL(reader_);
   }
 
-  void ReInit() override { reader_->ReInit(); }
+  void RegisterDecorateChain() {
+    reader_->InsertDecoratedReader(shared_from_this());
+  }
 
  protected:
-  std::shared_ptr<ReaderBase> reader_;
-};
-
-class FileReader : public ReaderBase {
- public:
-  explicit FileReader(const std::vector<DDim>& dims);
+  void ShutdownImpl() override { reader_->Shutdown(); }
 
-  void ReadNext(std::vector<LoDTensor>* out) override;
+  void StartImpl() override { reader_->Start(); }
 
- protected:
-  virtual void ReadNextImpl(std::vector<LoDTensor>* out) = 0;
-
- private:
-  std::vector<DDim> dims_;
+  std::shared_ptr<ReaderBase> reader_;
 };
 
+// FileReader is just a conceptual class.
+class FileReader : public ReaderBase {};
+
 // The ReaderHolder is used as reader' unified wrapper,
 // making it easier to access different type reader in Variables.
 class ReaderHolder {
  public:
-  void Reset(ReaderBase* reader) { reader_.reset(reader); }
+  template <typename T>
+  void Reset(const std::shared_ptr<T>& reader) {
+    auto reader_base = std::dynamic_pointer_cast<ReaderBase>(reader);
+    PADDLE_ENFORCE_NOT_NULL(reader_base);
+    reader_ = reader_base;
+  }
 
-  std::shared_ptr<ReaderBase> Get() const { return reader_; }
+  const std::shared_ptr<ReaderBase>& Get() const { return reader_; }
 
   void ReadNext(std::vector<LoDTensor>* out) {
     PADDLE_ENFORCE_NOT_NULL(reader_);
     reader_->ReadNext(out);
   }
-  void ReInit() {
+
+  void ResetAll() {
+    auto end_readers = reader_->GetEndPoints();
+    for (auto* reader : end_readers) {
+      reader->Shutdown();
+    }
+    for (auto* reader : end_readers) {
+      reader->Start();
+    }
+  }
+
+  void Shutdown() {
+    PADDLE_ENFORCE_NOT_NULL(reader_);
+    reader_->Shutdown();
+  }
+
+  void Start() {
     PADDLE_ENFORCE_NOT_NULL(reader_);
-    reader_->ReInit();
+    reader_->Start();
   }
 
+  operator const std::shared_ptr<ReaderBase>&() const { return this->reader_; }
+
  private:
   std::shared_ptr<ReaderBase> reader_;
 };
 
+template <typename T, typename... ARGS>
+inline std::shared_ptr<DecoratedReader> MakeDecoratedReader(ARGS&&... args) {
+  std::shared_ptr<DecoratedReader> reader(new T(std::forward<ARGS>(args)...));
+  reader->RegisterDecorateChain();
+  return reader;
+}
+
 }  // namespace framework
 }  // namespace paddle

paddle/fluid/framework/reader_test.cc

+// Copyright (c) 2018 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/fluid/framework/reader.h"
+#include <memory>
+#include "gtest/gtest.h"
+
+class StubDecoratedReader : public paddle::framework::DecoratedReader {
+ public:
+  explicit StubDecoratedReader(const std::shared_ptr<ReaderBase> &reader)
+      : DecoratedReader(reader) {}
+
+  void ReadNextImpl(std::vector<paddle::framework::LoDTensor> *out) override {}
+};
+
+class StubRootReader : public paddle::framework::ReaderBase {
+ public:
+  void ReadNextImpl(std::vector<paddle::framework::LoDTensor> *out) override {}
+};
+
+TEST(READER, decorate_chain) {
+  auto root = std::make_shared<StubRootReader>();
+  auto end_point1 =
+      paddle::framework::MakeDecoratedReader<StubDecoratedReader>(root);
+  auto end_point2 =
+      paddle::framework::MakeDecoratedReader<StubDecoratedReader>(root);
+
+  {
+    auto endpoints = root->GetEndPoints();
+    ASSERT_EQ(endpoints.size(), 2U);
+    ASSERT_NE(endpoints.count(end_point1.get()), 0);
+    ASSERT_NE(endpoints.count(end_point2.get()), 0);
+  }
+
+  {
+    auto end_point3 =
+        paddle::framework::MakeDecoratedReader<StubDecoratedReader>(root);
+    ASSERT_EQ(root->GetEndPoints().size(), 3U);
+  }
+  { ASSERT_EQ(root->GetEndPoints().size(), 2U); }
+}

paddle/fluid/framework/var_type_inference_test.cc

@@ -22,6 +22,17 @@ limitations under the License. */
 namespace paddle {
 namespace framework {
 
+class NOP : public OperatorBase {
+ public:
+  NOP(const std::string &type, const VariableNameMap &inputs,
+      const VariableNameMap &outputs, const AttributeMap &attrs)
+      : OperatorBase(type, inputs, outputs, attrs) {}
+
+ private:
+  void RunImpl(const Scope &scope,
+               const platform::Place &place) const override {}
+};
+
 class SumOpMaker : public OpProtoAndCheckerMaker {
  public:
   void Make() {

paddle/fluid/inference/CMakeLists.txt

-set(FLUID_CORE_MODULES proto_desc memory lod_tensor executor init)
+set(FLUID_CORE_MODULES proto_desc memory lod_tensor executor )
 
 # TODO(panyx0718): Should this be called paddle_fluid_inference_api_internal?
 cc_library(paddle_fluid_api

paddle/fluid/inference/analysis/README.md

@@ -54,4 +54,5 @@ It can be used as a helper class that draws the modified graph after each pass.
 There is some helper legacy/function/class for analysis.
 
 - [dot.h](./dot.h) give a easy to use interface for generating `DOT` codes,
-- [graph_traits.h](./graph_traits.h) contains the graph traversal algorithms, it uses `iterator` to make the algorithms easy to share across different passes.
+- [graph_traits.h](./graph_traits.h) contains the interfaces of the graph traversal algorithms, it uses `iterator`to make the algorithms easy to share across different passes,
+there are some implementations in  [data_flow_graph.cc](./data_flow_graph.cc) , such as BFS and DFS..

paddle/fluid/inference/analysis/fluid_to_data_flow_graph_pass_tester.cc

@@ -27,7 +27,7 @@ TEST_F(DFG_Tester, Init) {
   DataFlowGraph graph;
   pass.Run(&graph);
   // Analysis is sensitive to ProgramDesc, careful to change the original model.
-  ASSERT_EQ(graph.nodes.size(), 37);
+  ASSERT_EQ(graph.nodes.size(), 37UL);
   pass.Finalize();
   LOG(INFO) << '\n' << graph.DotString();
 }

paddle/fluid/inference/analysis/pass.h

@@ -32,19 +32,6 @@ class Pass {
  public:
   Pass() = default;
   virtual ~Pass() = default;
-  // Virtual method overridden by subclasses to do only necessary initialization
-  // before any pass is run.
-  // virtual bool Initialize() { return false; }
-  // There is some passes such as FlowToDataFlowGraphPass that needs a
-  // ProgramDesc. Here use the native ProgramDesc ProtoBuf message, so that it
-  // only couple with the proto file.
-  // virtual bool Initialize(const framework::proto::ProgramDesc &desc) { return
-  // false; }
-  // There are some Passes such as DataFlowGraphToFluidPass that will output a
-  // ProgramDesc.
-  // virtual bool Initialize(framework::proto::ProgramDesc *desc) { return
-  // false; }
-
   // Mutable Pass.
   virtual bool Initialize(Argument *argument) { return false; }
   // Readonly Pass.

paddle/fluid/inference/analysis/subgraph_splitter_tester.cc

@@ -82,7 +82,7 @@ TEST_F(DFG_Tester, Fuse) {
 
   // At least one nodes should be deleted.
   ASSERT_EQ(dfg.nodes.size(), count0 + 1);  // added a new FunctionBlock
-  ASSERT_EQ(6UL, count1);
+  ASSERT_EQ(6, count1);
 }
 
 }  // namespace analysis

paddle/fluid/inference/io.cc

@@ -20,7 +20,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/block_desc.h"
 #include "paddle/fluid/framework/feed_fetch_type.h"
 #include "paddle/fluid/framework/op_registry.h"
-#include "paddle/fluid/operators/math/blas.h"
+#include "paddle/fluid/platform/cpu_helper.h"
 #include "paddle/fluid/pybind/pybind.h"
 
 DEFINE_string(devices, "", "The devices to be used which is joined by comma.");
@@ -33,7 +33,7 @@ namespace inference {
 
 void Init(const std::vector<std::string> argv) {
   framework::InitGflags(argv);
-  operators::math::SetNumThreads(FLAGS_math_num_threads);
+  platform::SetNumThreads(FLAGS_math_num_threads);
   // init devices
   std::vector<int> devices;
   std::string token;

paddle/fluid/inference/io.h

@@ -18,9 +18,9 @@ limitations under the License. */
 #include <string>
 #include <vector>
 #include "paddle/fluid/framework/executor.h"
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/program_desc.h"
 #include "paddle/fluid/framework/scope.h"
+#include "paddle/fluid/platform/init.h"
 
 namespace paddle {
 namespace inference {

paddle/fluid/inference/tests/book/test_inference_nlp.cc

@@ -19,7 +19,7 @@ limitations under the License. */
 #include "gflags/gflags.h"
 #include "gtest/gtest.h"
 #include "paddle/fluid/inference/tests/test_helper.h"
-#include "paddle/fluid/operators/math/blas.h"
+#include "paddle/fluid/platform/cpu_helper.h"
 #ifdef PADDLE_WITH_MKLML
 #include <omp.h>
 #endif
@@ -164,7 +164,7 @@ TEST(inference, nlp) {
   // only use 1 thread number per std::thread
   omp_set_dynamic(0);
   omp_set_num_threads(1);
-  paddle::operators::math::SetNumThreads(1);
+  paddle::platform::SetNumThreads(1);
 #endif
 
   double start_ms = 0, stop_ms = 0;

paddle/fluid/memory/detail/buddy_allocator.cc

@@ -19,8 +19,9 @@ namespace paddle {
 namespace memory {
 namespace detail {
 
-BuddyAllocator::BuddyAllocator(SystemAllocator* system_allocator,
-                               size_t min_chunk_size, size_t max_chunk_size)
+BuddyAllocator::BuddyAllocator(
+    std::unique_ptr<SystemAllocator> system_allocator, size_t min_chunk_size,
+    size_t max_chunk_size)
     : min_chunk_size_(min_chunk_size),
       max_chunk_size_(max_chunk_size),
       cache_(system_allocator->UseGpu()),

paddle/fluid/memory/detail/buddy_allocator.h

@@ -14,6 +14,7 @@ limitations under the License. */
 
 #pragma once
 
+#include <memory>
 #include <mutex>  // NOLINT
 #include <set>
 #include <tuple>
@@ -32,8 +33,8 @@ namespace detail {
 
 class BuddyAllocator {
  public:
-  BuddyAllocator(SystemAllocator* system_allocator, size_t min_chunk_size,
-                 size_t max_chunk_size);
+  BuddyAllocator(std::unique_ptr<SystemAllocator> system_allocator,
+                 size_t min_chunk_size, size_t max_chunk_size);
 
   ~BuddyAllocator();
 
@@ -103,7 +104,7 @@ class BuddyAllocator {
 
  private:
   /*! Allocate CPU/GPU memory from system */
-  SystemAllocator* system_allocator_;
+  std::unique_ptr<SystemAllocator> system_allocator_;
   std::mutex mutex_;
 };
 

paddle/fluid/memory/malloc.cc

@@ -12,6 +12,8 @@ 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/fluid/memory/malloc.h"
 
 #include "glog/logging.h"
@@ -34,12 +36,15 @@ namespace memory {
 using BuddyAllocator = detail::BuddyAllocator;
 
 BuddyAllocator* GetCPUBuddyAllocator() {
+  static std::once_flag init_flag;
   static detail::BuddyAllocator* a = nullptr;
-  if (a == nullptr) {
-    a = new detail::BuddyAllocator(new detail::CPUAllocator,
-                                   platform::CpuMinChunkSize(),
-                                   platform::CpuMaxChunkSize());
-  }
+
+  std::call_once(init_flag, []() {
+    a = new detail::BuddyAllocator(
+        std::unique_ptr<detail::SystemAllocator>(new detail::CPUAllocator),
+        platform::CpuMinChunkSize(), platform::CpuMaxChunkSize());
+  });
+
   return a;
 }
 
@@ -68,19 +73,22 @@ size_t Used<platform::CPUPlace>(platform::CPUPlace place) {
 #ifdef PADDLE_WITH_CUDA
 
 BuddyAllocator* GetGPUBuddyAllocator(int gpu_id) {
-  static BuddyAllocator** as = NULL;
-  if (as == NULL) {
+  static std::once_flag init_flag;
+  static detail::BuddyAllocator** a_arr = nullptr;
+
+  std::call_once(init_flag, [gpu_id]() {
     int gpu_num = platform::GetCUDADeviceCount();
-    as = new BuddyAllocator*[gpu_num];
-    for (int gpu = 0; gpu < gpu_num; gpu++) {
-      as[gpu] = nullptr;
-    }
-  }
-  platform::SetDeviceId(gpu_id);
-  if (!as[gpu_id]) {
-    as[gpu_id] = new BuddyAllocator(new detail::GPUAllocator(gpu_id),
-                                    platform::GpuMinChunkSize(),
-                                    platform::GpuMaxChunkSize());
+    PADDLE_ENFORCE(gpu_id < gpu_num, "gpu_id:%d should < gpu_num:%d", gpu_id,
+                   gpu_num);
+
+    a_arr = new BuddyAllocator*[gpu_num];
+    for (int i = 0; i < gpu_num; i++) {
+      a_arr[i] = nullptr;
+      platform::SetDeviceId(i);
+      a_arr[i] = new BuddyAllocator(
+          std::unique_ptr<detail::SystemAllocator>(new detail::GPUAllocator(i)),
+          platform::GpuMinChunkSize(), platform::GpuMaxChunkSize());
+
       VLOG(10) << "\n\nNOTE: each GPU device use "
                << FLAGS_fraction_of_gpu_memory_to_use * 100
                << "% of GPU memory.\n"
@@ -88,7 +96,10 @@ BuddyAllocator* GetGPUBuddyAllocator(int gpu_id) {
                << "FLAGS_fraction_of_gpu_memory_to_use"
                << "' to change the fraction of GPU usage.\n\n";
     }
-  return as[gpu_id];
+  });
+
+  platform::SetDeviceId(gpu_id);
+  return a_arr[gpu_id];
 }
 
 template <>
@@ -125,12 +136,16 @@ void Free<platform::CUDAPlace>(platform::CUDAPlace place, void* p) {
 }
 
 BuddyAllocator* GetCUDAPinnedBuddyAllocator() {
-  static BuddyAllocator* ba = NULL;
-  if (ba == NULL) {
-    ba = new BuddyAllocator(new detail::CUDAPinnedAllocator,
+  static std::once_flag init_flag;
+  static BuddyAllocator* ba = nullptr;
+
+  std::call_once(init_flag, []() {
+    ba = new BuddyAllocator(std::unique_ptr<detail::SystemAllocator>(
+                                new detail::CUDAPinnedAllocator),
                             platform::CUDAPinnedMinChunkSize(),
                             platform::CUDAPinnedMaxChunkSize());
-  }
+  });
+
   return ba;
 }
 

paddle/fluid/operators/batch_norm_op.cc

@@ -216,6 +216,18 @@ class BatchNormKernel<platform::CPUDeviceContext, T>
       saved_mean_e.setZero();
       saved_variance_e.setZero();
 
+      EigenVectorArrayMap<T> running_mean_arr(
+          mean_out->mutable_data<T>(ctx.GetPlace()), C);
+      EigenVectorArrayMap<T> running_var_arr(
+          variance_out->mutable_data<T>(ctx.GetPlace()), C);
+
+      if ((N * sample_size) == 1) {
+        LOG(WARNING) << "Only 1 element in normalization dimension, "
+                     << "we skip the batch norm calculation, let y = x.";
+        framework::TensorCopySync(*x, ctx.GetPlace(), y);
+        return;
+      }
+
       switch (data_layout) {
         case DataLayout::kNCHW: {
           ConstEigenArrayMap<T> x_arr(x->data<T>(), sample_size, N * C);
@@ -247,10 +259,6 @@ class BatchNormKernel<platform::CPUDeviceContext, T>
           PADDLE_THROW("Unknown storage order: %s", data_layout_str);
       }
 
-      EigenVectorArrayMap<T> running_mean_arr(
-          mean_out->mutable_data<T>(ctx.GetPlace()), C);
-      EigenVectorArrayMap<T> running_var_arr(
-          variance_out->mutable_data<T>(ctx.GetPlace()), C);
       running_mean_arr =
           running_mean_arr * momentum + saved_mean_e * (1. - momentum);
       running_var_arr =
@@ -427,6 +435,11 @@ class BatchNormGradKernel<platform::CPUDeviceContext, T>
     d_bias_arr.setZero();
     d_scale_arr.setZero();
 
+    if ((N * sample_size) == 1) {
+      framework::TensorCopySync(*d_y, ctx.GetPlace(), d_x);
+      return;
+    }
+
     const auto scale_inv_var_nhw = scale_arr * inv_var_arr / (N * sample_size);
 
     switch (data_layout) {

paddle/fluid/operators/batch_norm_op.cu.cc

@@ -72,6 +72,9 @@ class BatchNormKernel<platform::CUDADeviceContext, T>
     int N, C, H, W, D;
     ExtractNCWHD(x_dims, data_layout, &N, &C, &H, &W, &D);
 
+    auto *y = ctx.Output<Tensor>("Y");
+    y->mutable_data<T>(ctx.GetPlace());
+
     // ------------------- cudnn descriptors ---------------------
     cudnnTensorDescriptor_t data_desc_;
     cudnnTensorDescriptor_t bn_param_desc_;
@@ -93,7 +96,7 @@ class BatchNormKernel<platform::CUDADeviceContext, T>
     mode_ = CUDNN_BATCHNORM_SPATIAL;
 #endif
 
-    VLOG(1) << "Setting descriptors.";
+    VLOG(3) << "Setting descriptors.";
     std::vector<int> dims;
     std::vector<int> strides;
     if (data_layout == DataLayout::kNCHW) {
@@ -113,11 +116,6 @@ class BatchNormKernel<platform::CUDADeviceContext, T>
     const auto *scale = ctx.Input<Tensor>("Scale");
     const auto *bias = ctx.Input<Tensor>("Bias");
 
-    auto *y = ctx.Output<Tensor>("Y");
-
-    // alloc memory
-    y->mutable_data<T>(ctx.GetPlace());
-
     auto &dev_ctx = ctx.template device_context<platform::CUDADeviceContext>();
 
     auto handle = dev_ctx.cudnn_handle();
@@ -162,6 +160,11 @@ class BatchNormKernel<platform::CUDADeviceContext, T>
       functor(dev_ctx, saved_mean, static_cast<BatchNormParamType<T>>(0));
       functor(dev_ctx, saved_variance, static_cast<BatchNormParamType<T>>(0));
 
+      if ((N * H * W * D) == 1) {
+        LOG(WARNING) << "Only 1 element in normalization dimension, "
+                     << "we skip the batch norm calculation, let y = x.";
+        framework::TensorCopySync(*x, ctx.GetPlace(), y);
+      } else {
         double this_factor = 1. - momentum;
 
         CUDNN_ENFORCE(platform::dynload::cudnnBatchNormalizationForwardTraining(
@@ -179,6 +182,7 @@ class BatchNormKernel<platform::CUDADeviceContext, T>
             saved_variance->template mutable_data<BatchNormParamType<T>>(
                 ctx.GetPlace())));
       }
+    }
 
     // clean when exit.
     CUDNN_ENFORCE(platform::dynload::cudnnDestroyTensorDescriptor(data_desc_));
@@ -209,6 +213,25 @@ class BatchNormGradKernel<platform::CUDADeviceContext, T>
     int N, C, H, W, D;
     ExtractNCWHD(x_dims, data_layout, &N, &C, &H, &W, &D);
 
+    // init output
+    auto *d_x = ctx.Output<Tensor>(framework::GradVarName("X"));
+    auto *d_scale = ctx.Output<Tensor>(framework::GradVarName("Scale"));
+    auto *d_bias = ctx.Output<Tensor>(framework::GradVarName("Bias"));
+
+    d_x->mutable_data<T>(ctx.GetPlace());
+    d_scale->mutable_data<T>(ctx.GetPlace());
+    d_bias->mutable_data<T>(ctx.GetPlace());
+
+    auto &dev_ctx = ctx.template device_context<platform::CUDADeviceContext>();
+    if ((N * H * W * D) == 1) {
+      framework::TensorCopySync(*d_y, ctx.GetPlace(), d_x);
+      math::SetConstant<platform::CUDADeviceContext, BatchNormParamType<T>>
+          functor;
+      functor(dev_ctx, d_scale, static_cast<BatchNormParamType<T>>(0));
+      functor(dev_ctx, d_bias, static_cast<BatchNormParamType<T>>(0));
+      return;
+    }
+
     PADDLE_ENFORCE_EQ(scale->dims().size(), 1UL);
     PADDLE_ENFORCE_EQ(scale->dims()[0], C);
 
@@ -247,21 +270,11 @@ class BatchNormGradKernel<platform::CUDADeviceContext, T>
     CUDNN_ENFORCE(platform::dynload::cudnnDeriveBNTensorDescriptor(
         bn_param_desc_, data_desc_, mode_));
 
-    // init output
-    auto *d_x = ctx.Output<Tensor>(framework::GradVarName("X"));
-    auto *d_scale = ctx.Output<Tensor>(framework::GradVarName("Scale"));
-    auto *d_bias = ctx.Output<Tensor>(framework::GradVarName("Bias"));
-
-    d_x->mutable_data<T>(ctx.GetPlace());
-    d_scale->mutable_data<T>(ctx.GetPlace());
-    d_bias->mutable_data<T>(ctx.GetPlace());
-
     const auto *saved_mean = ctx.Input<Tensor>("SavedMean");
     const auto *saved_var = ctx.Input<Tensor>("SavedVariance");
     const void *saved_mean_data = saved_mean->template data<T>();
     const void *saved_var_data = saved_var->template data<T>();
 
-    auto &dev_ctx = ctx.template device_context<platform::CUDADeviceContext>();
     CUDNN_ENFORCE(platform::dynload::cudnnBatchNormalizationBackward(
         dev_ctx.cudnn_handle(), mode_, CudnnDataType<T>::kOne(),
         CudnnDataType<T>::kZero(), CudnnDataType<T>::kOne(),

paddle/fluid/operators/conditional_block_op.cc

@@ -205,10 +205,11 @@ class ConditionalBlockGradInferShape : public framework::InferShapeBase {
       context->SetOutputsDim(framework::GradVarName("Params"),
                              context->GetInputsDim("Params"));
     }
-    PADDLE_ENFORCE(context->HasOutputs(framework::GradVarName("X")));
+    if (context->HasOutputs(framework::GradVarName("X"))) {
       context->SetOutputsDim(framework::GradVarName("X"),
                              context->GetInputsDim("X"));
     }
+  }
 };
 
 class ConditionalBlockGradMaker : public framework::SingleGradOpDescMaker {

paddle/fluid/operators/cross_entropy_op.cc

@@ -124,8 +124,7 @@ class CrossEntropyOpMaker : public framework::OpProtoAndCheckerMaker {
              "Tensor<float/double> with shape [N x D].");
     AddOutput("Y",
               "(Tensor, default Tensor<float>), a 2-D tensor with shape "
-              "[N x 1]. The cross entropy loss.")
-        .Reuse("X");
+              "[N x 1]. The cross entropy loss.");
     AddAttr<bool>("soft_label",
                   "(bool, default false), a flag indicating whether to "
                   "interpretate the given labels as soft labels.")

paddle/fluid/operators/distributed/CMakeLists.txt

@@ -5,7 +5,7 @@ if(WITH_GRPC)
   set(DISTRIBUTE_COMPILE_FLAGS "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor")
   set_source_files_properties(grpc_serde_test.cc rpc_server_test.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   cc_test(serde_test SRCS grpc_serde_test.cc variable_response.cc DEPS grpc++_unsecure grpc_unsecure gpr
-          cares zlib protobuf sendrecvop_grpc SERIAL)
+          cares zlib protobuf sendrecvop_grpc scope profiler math_function SERIAL)
   cc_test(grpc_server_test SRCS rpc_server_test.cc DEPS sendrecvop_grpc
           grpc++_unsecure grpc_unsecure gpr cares zlib protobuf executor
           proto_desc lookup_table_op SERIAL)

paddle/fluid/operators/elementwise_add_mkldnn_op.cc

@@ -85,7 +85,7 @@ class EltwiseAddMKLDNNKernel : public framework::OpKernel<T> {
                      "Wrong layout/format set for X tensor");
       PADDLE_ENFORCE(y->layout() == DataLayout::kMKLDNN &&
                          y->format() != memory::format::format_undef,
-                     "Wrong layout/format set for X tensor");
+                     "Wrong layout/format set for Y tensor");
 
       std::vector<int> src_x_tz = framework::vectorize2int(x_dims);
       std::vector<int> src_y_tz = framework::vectorize2int(y_dims);

paddle/fluid/operators/math/CMakeLists.txt

@@ -54,13 +54,13 @@ math_library(softmax DEPS math_function)
 math_library(unpooling)
 math_library(vol2col)
 
-cc_test(math_function_test SRCS math_function_test.cc)
+cc_test(math_function_test SRCS math_function_test.cc DEPS math_function)
 cc_test(selected_rows_functor_test SRCS selected_rows_functor_test.cc DEPS selected_rows_functor)
 cc_test(im2col_test SRCS im2col_test.cc DEPS im2col)
 cc_test(vol2col_test SRCS vol2col_test.cc DEPS vol2col)
 cc_test(sequence_padding_test SRCS sequence_padding_test.cc DEPS sequence_padding)
 if(WITH_GPU)
-    nv_test(math_function_gpu_test SRCS math_function_test.cu)
-    nv_test(selected_rows_functor_gpu_test SRCS selected_rows_functor_test.cu DEPS selected_rows_functor)
+    nv_test(math_function_gpu_test SRCS math_function_test.cu DEPS math_function)
+    nv_test(selected_rows_functor_gpu_test SRCS selected_rows_functor_test.cu DEPS selected_rows_functor math_function)
 endif()
 cc_test(concat_test SRCS concat_test.cc DEPS concat)

paddle/fluid/operators/math/blas.h

@@ -23,41 +23,12 @@
 
 #ifdef PADDLE_USE_OPENBLAS
 #include <cblas.h>
-#ifdef LAPACK_FOUND
-#include <lapacke.h>
-#endif
-#endif
-
-#ifndef LAPACK_FOUND
-extern "C" {
-#include <cblas.h>  // NOLINT
-int LAPACKE_sgetrf(int matrix_layout, int m, int n, float* a, int lda,
-                   int* ipiv);
-int LAPACKE_dgetrf(int matrix_layout, int m, int n, double* a, int lda,
-                   int* ipiv);
-int LAPACKE_sgetri(int matrix_layout, int n, float* a, int lda,
-                   const int* ipiv);
-int LAPACKE_dgetri(int matrix_layout, int n, double* a, int lda,
-                   const int* ipiv);
-}
 #endif
 
 namespace paddle {
 namespace operators {
 namespace math {
 
-static void SetNumThreads(int num_threads) {
-#ifdef PADDLE_USE_OPENBLAS
-  int real_num_threads = num_threads > 1 ? num_threads : 1;
-  openblas_set_num_threads(real_num_threads);
-#elif defined(PADDLE_WITH_MKLML)
-  int real_num_threads = num_threads > 1 ? num_threads : 1;
-  platform::dynload::MKL_Set_Num_Threads(real_num_threads);
-#else
-  PADDLE_ENFORCE(false, "To be implemented.");
-#endif
-}
-
 /**
  * Matrix Descriptor of a memory buffer.
  *

paddle/fluid/operators/math/math_function.h

@@ -19,23 +19,6 @@ limitations under the License. */
 
 #ifdef PADDLE_USE_OPENBLAS
 #include <cblas.h>
-#ifdef LAPACK_FOUND
-#include <lapacke.h>
-#endif
-#endif
-
-#ifndef LAPACK_FOUND
-extern "C" {
-#include <cblas.h>  // NOLINT
-int LAPACKE_sgetrf(int matrix_layout, int m, int n, float* a, int lda,
-                   int* ipiv);
-int LAPACKE_dgetrf(int matrix_layout, int m, int n, double* a, int lda,
-                   int* ipiv);
-int LAPACKE_sgetri(int matrix_layout, int n, float* a, int lda,
-                   const int* ipiv);
-int LAPACKE_dgetri(int matrix_layout, int n, double* a, int lda,
-                   const int* ipiv);
-}
 #endif
 
 #include <cmath>

paddle/fluid/operators/merge_lod_tensor_op.cc

@@ -44,8 +44,10 @@ class MergeLoDTensorOp : public framework::OperatorBase {
         scope.FindVar(Output("Out"))->GetMutable<framework::LoDTensor>();
     auto level = static_cast<size_t>(Attr<int>("level"));
 
-    auto &mask_dim = mask.dims();
+    PADDLE_ENFORCE(in_true.numel() || in_false.numel(),
+                   "Input(InTrue) or Input(InFalse) should be initialized.");
 
+    auto &mask_dim = mask.dims();
     std::unique_ptr<framework::LoDTensor> cpu_mask{new framework::LoDTensor()};
     if (platform::is_cpu_place(mask.place())) {
       cpu_mask->ShareDataWith(mask);
@@ -59,19 +61,27 @@ class MergeLoDTensorOp : public framework::OperatorBase {
     }
     auto *mask_data = cpu_mask->data<bool>();
 
-    int rank = in_true.dims().size();
-    platform::Place place = in_true.place();
-    std::type_index data_type = in_true.type();
-    framework::DDim in_true_dims =
-        framework::slice_ddim(in_true.dims(), 1, rank);
-
+    platform::Place place = dev_place;
     int64_t batch_size = in_true.dims()[0] + in_false.dims()[0];
 
-    auto in_true_dim_vec = framework::vectorize(in_true_dims);
-    in_true_dim_vec.insert(in_true_dim_vec.begin(), batch_size);
+    std::type_index data_type =
+        in_true.IsInitialized() ? in_true.type() : in_false.type();
+    int rank;
+    framework::DDim in_dims;
+    if (in_true.IsInitialized()) {
+      rank = in_true.dims().size();
+      in_dims = framework::slice_ddim(in_true.dims(), 1, rank);
+    } else {
+      rank = in_false.dims().size();
+      in_dims = framework::slice_ddim(in_false.dims(), 1, rank);
+    }
+
+    auto in_dim_vec = framework::vectorize(in_dims);
+    in_dim_vec.insert(in_dim_vec.begin(), batch_size);
 
-    framework::DDim out_dims = framework::make_ddim(in_true_dim_vec);
+    framework::DDim out_dims = framework::make_ddim(in_dim_vec);
     out->Resize(out_dims);
+
     out->mutable_data(place, data_type);
 
     auto *out_lod = out->mutable_lod();

paddle/fluid/operators/nccl_op_test.cu.cc

@@ -19,7 +19,6 @@ limitations under the License. */
 #include <thread>  // NOLINT
 #include <vector>
 
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/op_desc.h"
 #include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/framework/program_desc.h"
@@ -27,6 +26,7 @@ limitations under the License. */
 #include "paddle/fluid/platform/device_context.h"
 #include "paddle/fluid/platform/enforce.h"
 #include "paddle/fluid/platform/gpu_info.h"
+#include "paddle/fluid/platform/init.h"
 #include "paddle/fluid/platform/place.h"
 
 USE_NO_KERNEL_OP(ncclInit);

paddle/fluid/operators/read_op.cc

@@ -92,9 +92,13 @@ class ReadOpMaker : public framework::OpProtoAndCheckerMaker {
   void Make() override {
     AddInput("Reader", "(ReaderHolder) The executed reader.");
     AddOutput("Out", "(LoDTensor) The output data.").AsDuplicable();
-    AddAttr<bool>("throw_eof_exp",
+    AddAttr<bool>(
+        "throw_eof_exp",
         "If set true, an exception will be thrown when the Reader "
-                  "yields empty (which means there is no next data).")
+        "yields empty (which means there is no next data).\n"
+        "NOTES: This flag must be true always. It will be set to false"
+        " only when the data-balance is enabled in ParallelExecutor"
+        " and it is set by ParallelExecutor instance, not users.")
         .SetDefault(true);
     AddComment(R"DOC(
       Read Operator

paddle/fluid/operators/reader/CMakeLists.txt

@@ -22,7 +22,6 @@ reader_library(create_batch_reader_op SRCS create_batch_reader_op.cc)
 reader_library(create_recordio_file_reader_op SRCS create_recordio_file_reader_op.cc)
 reader_library(create_double_buffer_reader_op SRCS create_double_buffer_reader_op.cc)
 reader_library(create_multi_pass_reader_op SRCS create_multi_pass_reader_op.cc)
-reader_library(create_threaded_reader_op SRCS create_threaded_reader_op.cc)
 reader_library(create_custom_reader_op SRCS create_custom_reader_op.cc)
 reader_library(create_py_reader_op SRCS create_py_reader_op.cc)
 

paddle/fluid/operators/reader/create_batch_reader_op.cc

@@ -20,15 +20,19 @@ namespace reader {
 
 class BatchReader : public framework::DecoratedReader {
  public:
-  BatchReader(const std::shared_ptr<ReaderBase>& reader, int batch_size)
-      : DecoratedReader(reader), batch_size_(batch_size) {
+  BatchReader(const std::shared_ptr<ReaderBase>& reader, int batch_size,
+              bool discard_leftover)
+      : DecoratedReader(reader),
+        batch_size_(batch_size),
+        discard_leftover_(discard_leftover) {
     buffer_.reserve(batch_size_);
   }
 
-  void ReadNext(std::vector<framework::LoDTensor>* out) override;
+  void ReadNextImpl(std::vector<framework::LoDTensor>* out) override;
 
  private:
   int batch_size_;
+  bool discard_leftover_;
   std::vector<std::vector<framework::LoDTensor>> buffer_;
 };
 
@@ -46,8 +50,9 @@ class CreateBatchReaderOp : public framework::OperatorBase {
     }
     const auto& underlying_reader = scope.FindVar(Input("UnderlyingReader"))
                                         ->Get<framework::ReaderHolder>();
-    out->Reset(
-        new BatchReader(underlying_reader.Get(), Attr<int>("batch_size")));
+    out->Reset(framework::MakeDecoratedReader<BatchReader>(
+        underlying_reader, Attr<int>("batch_size"),
+        Attr<bool>("discard_leftover")));
   }
 };
 
@@ -57,6 +62,10 @@ class CreateBatchReaderOpMaker : public DecoratedReaderMakerBase {
     AddAttr<int>("batch_size",
                  "How many instances the batch reader yields each time.")
         .GreaterThan(0);
+    AddAttr<bool>("discard_leftover",
+                  "If true, the leftover instances that are not enough for a "
+                  "new batch will be discarded.")
+        .SetDefault(true);
     AddComment(R"DOC(
       CreateBatchReader Operator
 
@@ -66,7 +75,7 @@ class CreateBatchReaderOpMaker : public DecoratedReaderMakerBase {
   }
 };
 
-void BatchReader::ReadNext(std::vector<framework::LoDTensor>* out) {
+void BatchReader::ReadNextImpl(std::vector<framework::LoDTensor>* out) {
   buffer_.clear();
   buffer_.reserve(batch_size_);
   for (int i = 0; i < batch_size_; ++i) {
@@ -77,6 +86,9 @@ void BatchReader::ReadNext(std::vector<framework::LoDTensor>* out) {
       break;
     }
   }
+  if (discard_leftover_ && buffer_.size() < batch_size_) {
+    buffer_.clear();
+  }
   // Concat instances
   out->clear();
   if (buffer_.empty()) {

paddle/fluid/operators/reader/create_custom_reader_op.cc

@@ -33,7 +33,7 @@ class CustomReader : public framework::DecoratedReader {
         source_var_names_(source_var_names),
         sink_var_names_(sink_var_names) {}
 
-  void ReadNext(std::vector<framework::LoDTensor>* out) override;
+  void ReadNextImpl(std::vector<framework::LoDTensor>* out) override;
 
  private:
   const framework::ProgramDesc program_;
@@ -60,8 +60,8 @@ class CreateCustomReaderOp : public framework::OperatorBase {
     }
     const auto& underlying_reader = scope.FindVar(Input("UnderlyingReader"))
                                         ->Get<framework::ReaderHolder>();
-    out->Reset(
-        new CustomReader(underlying_reader.Get(), *sub_block,
+    out->Reset(framework::MakeDecoratedReader<CustomReader>(
+        underlying_reader, *sub_block,
         Attr<std::vector<std::string>>("source_var_names"),
         Attr<std::vector<std::string>>("sink_var_names")));
   }
@@ -143,7 +143,7 @@ class CustomReaderInferVarType : public framework::VarTypeInference {
   }
 };
 
-void CustomReader::ReadNext(std::vector<framework::LoDTensor>* out) {
+void CustomReader::ReadNextImpl(std::vector<framework::LoDTensor>* out) {
   out->clear();
   std::vector<framework::LoDTensor> underlying_outs;
   reader_->ReadNext(&underlying_outs);

paddle/fluid/operators/reader/create_double_buffer_reader_op.cc

@@ -23,13 +23,13 @@ namespace reader {
 
 // 'Double buffer' means we shall maintain two batches of input data at the same
 // time. So the kCacheSize shoul be at least 2.
-static constexpr size_t kCacheSize = 5;
+static constexpr size_t kCacheSize = 3;
 // There will be two bacthes out of the channel during training:
 // 1. the one waiting to be sent to the channel
 // 2. the one just be received from the channel, which is also being used by
 // subsequent operators.
 // So the channel size should be kChacheSize - 2
-static constexpr size_t kChannelSize = 3;  // kCacheSize - 2
+static constexpr size_t kChannelSize = 1;  // kCacheSize - 2
 
 class DoubleBufferReader : public framework::DecoratedReader {
  public:
@@ -50,12 +50,21 @@ class DoubleBufferReader : public framework::DecoratedReader {
     StartPrefetcher();
   }
 
-  void ReadNext(std::vector<framework::LoDTensor>* out) override;
-  void ReInit() override;
+  void ReadNextImpl(std::vector<framework::LoDTensor>* out) override;
 
   ~DoubleBufferReader() { EndPrefetcher(); }
 
  private:
+  void ShutdownImpl() override {
+    EndPrefetcher();
+    reader_->Shutdown();
+  }
+
+  void StartImpl() override {
+    reader_->Start();
+    StartPrefetcher();
+  }
+
   void StartPrefetcher() {
     channel_ = new reader::BlockingQueue<size_t>(kChannelSize);
     prefetcher_ = std::thread([this] { PrefetchThreadFunc(); });
@@ -109,7 +118,8 @@ class CreateDoubleBufferReaderOp : public framework::OperatorBase {
       place = platform::CUDAPlace(static_cast<int>(num));
     }
 
-    out->Reset(new DoubleBufferReader(underlying_reader.Get(), place));
+    out->Reset(framework::MakeDecoratedReader<DoubleBufferReader>(
+        underlying_reader, place));
   }
 };
 
@@ -136,7 +146,7 @@ class CreateDoubleBufferReaderOpMaker : public DecoratedReaderMakerBase {
   }
 };
 
-void DoubleBufferReader::ReadNext(std::vector<framework::LoDTensor>* out) {
+void DoubleBufferReader::ReadNextImpl(std::vector<framework::LoDTensor>* out) {
   size_t cached_tensor_id;
   if (channel_->Receive(&cached_tensor_id)) {
     if (platform::is_gpu_place(place_)) {
@@ -150,12 +160,6 @@ void DoubleBufferReader::ReadNext(std::vector<framework::LoDTensor>* out) {
   }
 }
 
-void DoubleBufferReader::ReInit() {
-  reader_->ReInit();
-  EndPrefetcher();
-  StartPrefetcher();
-}
-
 void DoubleBufferReader::PrefetchThreadFunc() {
   VLOG(5) << "A new prefetch thread starts.";
   size_t cached_tensor_id = 0;

paddle/fluid/operators/reader/create_multi_pass_reader_op.cc

@@ -24,23 +24,22 @@ class MultiPassReader : public framework::DecoratedReader {
   MultiPassReader(const std::shared_ptr<ReaderBase>& reader, int pass_num)
       : DecoratedReader(reader), pass_num_(pass_num), pass_count_(0) {}
 
-  void ReadNext(std::vector<framework::LoDTensor>* out) override {
+  void ReadNextImpl(std::vector<framework::LoDTensor>* out) override {
     reader_->ReadNext(out);
-    if (out->empty()) {
-      ++pass_count_;
-      if (pass_count_ < pass_num_) {
-        reader_->ReInit();
+    if (out->empty() && pass_count_ < pass_num_ - 1) {
+      reader_->Shutdown();
+      reader_->Start();
       reader_->ReadNext(out);
-      }
+      ++pass_count_;
     }
   }
 
-  void ReInit() override {
+ private:
+  void StartImpl() override {
     pass_count_ = 0;
-    reader_->ReInit();
+    reader_->Start();
   }
 
- private:
   int pass_num_;
   mutable int pass_count_;
 };
@@ -60,7 +59,8 @@ class CreateMultiPassReaderOp : public framework::OperatorBase {
     const auto& underlying_reader = scope.FindVar(Input("UnderlyingReader"))
                                         ->Get<framework::ReaderHolder>();
     int pass_num = Attr<int>("pass_num");
-    out->Reset(new MultiPassReader(underlying_reader.Get(), pass_num));
+    out->Reset(framework::MakeDecoratedReader<MultiPassReader>(
+        underlying_reader, pass_num));
   }
 };
 

paddle/fluid/operators/reader/create_py_reader_op.cc

@@ -19,9 +19,10 @@ namespace paddle {
 namespace operators {
 namespace reader {
 
-class PyReader : public framework::ReaderBase {
+class PyReader : public framework::FileReader {
  public:
-  explicit PyReader(const std::shared_ptr<LoDTensorBlockingQueue>& queue) {
+  explicit PyReader(const std::shared_ptr<LoDTensorBlockingQueue>& queue)
+      : framework::FileReader() {
     PADDLE_ENFORCE(queue != nullptr, "LoDTensorBlockingQueue must not be null");
     queue_ = queue;
   }
@@ -32,7 +33,9 @@ class PyReader : public framework::ReaderBase {
     if (!success) out->clear();
   }
 
-  void ReInit() override { queue_->ReOpen(); }
+  void Shutdown() override { queue_->Close(); }
+
+  void Start() override { queue_->ReOpen(); }
 
  private:
   std::shared_ptr<LoDTensorBlockingQueue> queue_;
@@ -51,14 +54,14 @@ class CreatePyReaderOp : public framework::OperatorBase {
 
     const std::string& queue_name = Input("blocking_queue");
     auto* queue_holder_var = scope.FindVar(queue_name);
-    PADDLE_ENFORCE(
-        queue_holder_var != nullptr,
+    PADDLE_ENFORCE_NOT_NULL(
+        queue_holder_var,
         "No LoDTensorBlockingQueueHolder variable with name %s found",
         queue_name);
     auto* queue_holder =
         queue_holder_var->template GetMutable<LoDTensorBlockingQueueHolder>();
 
-    out->Reset(new PyReader(queue_holder->GetQueue()));
+    out->Reset(std::make_shared<PyReader>(queue_holder->GetQueue()));
   }
 };
 

paddle/fluid/operators/reader/create_random_data_generator_op.cc

@@ -19,11 +19,11 @@ namespace operators {
 namespace reader {
 
 template <typename T>
-class RandomDataGenerator : public framework::ReaderBase {
+class RandomDataGenerator : public framework::FileReader {
  public:
   RandomDataGenerator(const std::vector<framework::DDim>& shapes, float low,
                       float high)
-      : framework::ReaderBase(), low_(low), high_(high), shapes_(shapes) {
+      : framework::FileReader(), low_(low), high_(high), shapes_(shapes) {
     PADDLE_ENFORCE_LE(low, high,
                       "'low' shouldn't be greater than 'high'.(%f vs %f)", low,
                       high);
@@ -32,7 +32,7 @@ class RandomDataGenerator : public framework::ReaderBase {
     dist_ = std::uniform_real_distribution<float>(low_, high_);
   }
 
-  void ReadNext(std::vector<framework::LoDTensor>* out) override {
+  void ReadNextImpl(std::vector<framework::LoDTensor>* out) override {
     out->clear();
     out->reserve(shapes_.size());
     for (const framework::DDim& shape : shapes_) {
@@ -51,8 +51,6 @@ class RandomDataGenerator : public framework::ReaderBase {
     }
   }
 
-  void ReInit() override { return; }
-
  private:
   float low_;
   float high_;
@@ -79,8 +77,8 @@ class CreateRandomDataGeneratorOp : public framework::OperatorBase {
     std::vector<framework::DDim> shapes = RestoreShapes(shape_concat, ranks);
     auto* out = scope.FindVar(Output("Out"))
                     ->template GetMutable<framework::ReaderHolder>();
-    out->Reset(new RandomDataGenerator<T>(shapes, Attr<float>("low"),
-                                          Attr<float>("high")));
+    out->Reset(std::make_shared<RandomDataGenerator<T>>(
+        shapes, Attr<float>("low"), Attr<float>("high")));
   }
 };
 

paddle/fluid/operators/reader/create_recordio_file_reader_op.cc

@@ -21,10 +21,8 @@ namespace reader {
 template <bool ThreadSafe>
 class RecordIOFileReader : public framework::FileReader {
  public:
-  explicit RecordIOFileReader(const std::string& filename,
-                              const std::vector<framework::DDim>& dims)
-      : FileReader(dims),
-        scanner_(filename),
+  explicit RecordIOFileReader(const std::string& filename)
+      : scanner_(filename),
         dev_ctx_(*platform::DeviceContextPool::Instance().Get(
             platform::CPUPlace())) {
     if (ThreadSafe) {
@@ -33,8 +31,6 @@ class RecordIOFileReader : public framework::FileReader {
     LOG(INFO) << "Creating file reader" << filename;
   }
 
-  void ReInit() override { scanner_.Reset(); }
-
  protected:
   void ReadNextImpl(std::vector<framework::LoDTensor>* out) override {
     if (ThreadSafe) {
@@ -45,6 +41,8 @@ class RecordIOFileReader : public framework::FileReader {
     }
   }
 
+  void StartImpl() override { scanner_.Reset(); }
+
  private:
   std::unique_ptr<std::mutex> mutex_;
   recordio::Scanner scanner_;
@@ -58,20 +56,11 @@ class CreateRecordIOReaderOp : public framework::OperatorBase {
  private:
   void RunImpl(const framework::Scope& scope,
                const platform::Place& dev_place) const override {
-    const auto& shape_concat = Attr<std::vector<int>>("shape_concat");
-    const auto& ranks = Attr<std::vector<int>>("ranks");
-    PADDLE_ENFORCE(!shape_concat.empty() && !ranks.empty());
-    PADDLE_ENFORCE_EQ(std::accumulate(ranks.begin(), ranks.end(), 0),
-                      static_cast<int>(shape_concat.size()),
-                      "The accumulate of all ranks should be equal to the "
-                      "shape concat's length.");
     std::string filename = Attr<std::string>("filename");
-
     auto* out = scope.FindVar(Output("Out"))
                     ->template GetMutable<framework::ReaderHolder>();
 
-    out->Reset(new RecordIOFileReader<true>(
-        filename, RestoreShapes(shape_concat, ranks)));
+    out->Reset(std::make_shared<RecordIOFileReader<true>>(filename));
   }
 };
 

paddle/fluid/operators/reader/create_shuffle_reader_op.cc

@@ -34,7 +34,7 @@ class ShuffleReader : public framework::DecoratedReader {
     ReloadBuffer();
   }
 
-  void ReadNext(std::vector<framework::LoDTensor>* out) override {
+  void ReadNextImpl(std::vector<framework::LoDTensor>* out) override {
     out->clear();
     if (iteration_pos_ >= buffer_.size()) {
       VLOG(10) << "Resetting shuffle buffer";
@@ -47,6 +47,17 @@ class ShuffleReader : public framework::DecoratedReader {
   }
 
  private:
+  void ShutdownImpl() override {
+    buffer_.clear();
+    iteration_pos_ = 0;
+    reader_->Shutdown();
+  }
+
+  void StartImpl() override {
+    reader_->Start();
+    ReloadBuffer();
+  }
+
   void ReloadBuffer() {
     buffer_.clear();
     buffer_.reserve(buffer_size_);
@@ -86,9 +97,8 @@ class CreateShuffleReaderOp : public framework::OperatorBase {
     }
     const auto& underlying_reader = scope.FindVar(Input("UnderlyingReader"))
                                         ->Get<framework::ReaderHolder>();
-    out->Reset(
-        new ShuffleReader(underlying_reader.Get(),
-                          static_cast<size_t>(Attr<int>("buffer_size"))));
+    out->Reset(framework::MakeDecoratedReader<ShuffleReader>(
+        underlying_reader, static_cast<size_t>(Attr<int>("buffer_size"))));
   }
 };
 

paddle/fluid/operators/reader/create_threaded_reader_op.cc

-//   Copyright (c) 2018 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/fluid/operators/detail/safe_ref.h"
-#include "paddle/fluid/operators/reader/reader_op_registry.h"
-
-namespace paddle {
-namespace operators {
-namespace reader {
-
-class ThreadedReader : public framework::DecoratedReader {
- public:
-  explicit ThreadedReader(const std::shared_ptr<ReaderBase>& reader)
-      : DecoratedReader(reader) {}
-
-  void ReadNext(std::vector<framework::LoDTensor>* out) override {
-    std::lock_guard<std::mutex> lock(mutex_);
-    reader_->ReadNext(out);
-  }
-
-  void ReInit() override { reader_->ReInit(); }
-
- private:
-  std::mutex mutex_;
-};
-
-class CreateThreadedReaderOp : public framework::OperatorBase {
- public:
-  using framework::OperatorBase::OperatorBase;
-
- private:
-  void RunImpl(const framework::Scope& scope,
-               const platform::Place& dev_place) const override {
-    auto* out = detail::Ref(scope.FindVar(Output("Out")))
-                    .GetMutable<framework::ReaderHolder>();
-    if (out->Get() != nullptr) {
-      return;
-    }
-    const auto& underlying_reader = scope.FindVar(Input("UnderlyingReader"))
-                                        ->Get<framework::ReaderHolder>();
-    out->Reset(new ThreadedReader(underlying_reader.Get()));
-  }
-};
-
-class CreateThreadedReaderOpMaker : public DecoratedReaderMakerBase {
- protected:
-  void Apply() override {
-    AddComment(R"DOC(
-      CreateThreadedReader Operator
-
-      This operator creates a threaded reader. A threaded reader's
-      'ReadNext()' can be invoked by several threads at the same
-      time.
-      When the attribute 'safe_mode' is true, the threaded reader's
-      'ReInit()' is disabled to avoid unexpected bugs in multi-thread
-      environment.
-    )DOC");
-  }
-};
-
-}  // namespace reader
-}  // namespace operators
-}  // namespace paddle
-
-namespace reader = paddle::operators::reader;
-REGISTER_DECORATED_READER_OPERATOR(create_threaded_reader,
-                                   reader::CreateThreadedReaderOp,
-                                   reader::CreateThreadedReaderOpMaker);

paddle/fluid/operators/reader/open_files_op.cc

@@ -23,24 +23,26 @@ namespace reader {
 
 class MultiFileReader : public framework::ReaderBase {
  public:
-  MultiFileReader(const std::vector<std::string>& file_names,
-                  const std::vector<framework::DDim>& dims, size_t thread_num,
+  MultiFileReader(const std::vector<std::string>& file_names, size_t thread_num,
                   size_t buffer_size)
       : buffer_size_(buffer_size) {
     readers_.reserve(file_names.size());
     for (const std::string& f_name : file_names) {
-      readers_.emplace_back(CreateReaderByFileName(f_name, dims));
+      readers_.emplace_back(CreateReaderByFileName(f_name));
     }
     prefetchers_.resize(thread_num);
     StartNewScheduler();
   }
 
-  void ReadNext(std::vector<framework::LoDTensor>* out) override;
-  void ReInit() override;
+  void ReadNextImpl(std::vector<framework::LoDTensor>* out) override;
 
   ~MultiFileReader() { EndScheduler(); }
 
  private:
+  void ShutdownImpl() override { EndScheduler(); }
+
+  void StartImpl() override { StartNewScheduler(); }
+
   void StartNewScheduler();
   void EndScheduler();
   void ScheduleThreadFunc();
@@ -55,17 +57,12 @@ class MultiFileReader : public framework::ReaderBase {
   reader::BlockingQueue<std::vector<framework::LoDTensor>>* buffer_;
 };
 
-void MultiFileReader::ReadNext(std::vector<framework::LoDTensor>* out) {
+void MultiFileReader::ReadNextImpl(std::vector<framework::LoDTensor>* out) {
   if (!buffer_->Receive(out)) {
     out->clear();
   }
 }
 
-void MultiFileReader::ReInit() {
-  EndScheduler();
-  StartNewScheduler();
-}
-
 void MultiFileReader::StartNewScheduler() {
   size_t thread_num = prefetchers_.size();
   waiting_reader_idx_ = new reader::BlockingQueue<size_t>(readers_.size());
@@ -120,7 +117,7 @@ void MultiFileReader::ScheduleThreadFunc() {
       }
     }
   }
-  // If users invoke ReInit() when scheduler is running, it will close the
+  // If users invoke Shutdown() when scheduler is running, it will close the
   // 'avaiable_thread_idx_' and prefecther threads have no way to tell scheduler
   // to release their resource. So a check is needed before scheduler ends.
   for (auto& p : prefetchers_) {
@@ -138,7 +135,8 @@ void MultiFileReader::PrefetchThreadFunc(size_t reader_idx, size_t thread_idx) {
     std::vector<framework::LoDTensor> ins;
     reader->ReadNext(&ins);
     if (ins.empty()) {
-      reader->ReInit();
+      reader->Shutdown();
+      reader->Start();
       break;
     }
     try {
@@ -180,9 +178,8 @@ class OpenFilesOp : public framework::OperatorBase {
 
     auto* out = scope.FindVar(Output("Out"))
                     ->template GetMutable<framework::ReaderHolder>();
-    out->Reset(new MultiFileReader(file_names,
-                                   RestoreShapes(shape_concat, ranks),
-                                   thread_num, buffer_size));
+    out->Reset(
+        std::make_shared<MultiFileReader>(file_names, thread_num, buffer_size));
   }
 };
 

paddle/fluid/operators/reader/reader_op_registry.cc

@@ -39,7 +39,7 @@ std::unordered_map<std::string, FileReaderCreator>& FileReaderRegistry() {
 }
 
 std::unique_ptr<framework::ReaderBase> CreateReaderByFileName(
-    const std::string& file_name, const std::vector<framework::DDim>& dims) {
+    const std::string& file_name) {
   size_t separator_pos = file_name.find_last_of(kFileFormatSeparator);
   PADDLE_ENFORCE_NE(separator_pos, std::string::npos,
                     "File name illegal! A legal file name should be like: "
@@ -49,7 +49,7 @@ std::unique_ptr<framework::ReaderBase> CreateReaderByFileName(
   auto itor = FileReaderRegistry().find(filetype);
   PADDLE_ENFORCE(itor != FileReaderRegistry().end(),
                  "No file reader registered for '%s' format.", filetype);
-  framework::ReaderBase* reader = (itor->second)(file_name, dims);
+  framework::ReaderBase* reader = (itor->second)(file_name);
   return std::unique_ptr<framework::ReaderBase>(reader);
 }
 

paddle/fluid/operators/reader/reader_op_registry.h

@@ -25,22 +25,21 @@ namespace reader {
 
 static constexpr char kFileFormatSeparator[] = ".";
 
-using FileReaderCreator = std::function<framework::ReaderBase*(
-    const std::string&, const std::vector<framework::DDim>&)>;
+using FileReaderCreator =
+    std::function<framework::ReaderBase*(const std::string&)>;
 
 std::unordered_map<std::string, FileReaderCreator>& FileReaderRegistry();
 
 template <typename Reader>
 int RegisterFileReader(const std::string& filetype) {
-  FileReaderRegistry()[filetype] = [](
-      const std::string& fn, const std::vector<framework::DDim>& dims) {
-    return new Reader(fn, dims);
+  FileReaderRegistry()[filetype] = [](const std::string& fn) {
+    return new Reader(fn);
   };
   return 0;
 }
 
 std::unique_ptr<framework::ReaderBase> CreateReaderByFileName(
-    const std::string& file_name, const std::vector<framework::DDim>& dims);
+    const std::string& file_name);
 
 extern std::vector<framework::DDim> RestoreShapes(
     const std::vector<int>& shape_concat, const std::vector<int>& ranks);

paddle/fluid/platform/CMakeLists.txt

@@ -28,6 +28,9 @@ cc_test(place_test SRCS place_test.cc DEPS place glog gflags)
 
 add_subdirectory(dynload)
 
+cc_library(cpu_helper SRCS cpu_helper.cc DEPS cblas enforce)
+cc_test(cpu_helper_test SRCS cpu_helper_test.cc DEPS cpu_helper)
+
 IF(WITH_GPU)
     set(GPU_CTX_DEPS dynload_cuda dynamic_loader)
 ELSE()
@@ -42,10 +45,12 @@ ENDIF()
 
 # memcpy depends on device_context, here add deps individually for
 # avoiding cycle dependencies
-cc_library(device_context SRCS device_context.cc DEPS malloc
-    place eigen3 ${GPU_CTX_DEPS} ${MKLDNN_CTX_DEPS})
+cc_library(device_context SRCS device_context.cc init.cc DEPS malloc
+    place eigen3 stringpiece cpu_helper ${GPU_CTX_DEPS} ${MKLDNN_CTX_DEPS})
 nv_test(device_context_test SRCS device_context_test.cu DEPS device_context gpu_info)
 
+cc_test(init_test SRCS init_test.cc DEPS device_context)
+
 nv_test(cudnn_helper_test SRCS cudnn_helper_test.cc DEPS dynload_cuda)
 nv_test(transform_test SRCS transform_test.cu DEPS memory place device_context)
 
@@ -53,5 +58,5 @@ cc_library(device_tracer SRCS device_tracer.cc DEPS boost profiler_proto framewo
 cc_library(profiler SRCS profiler.cc DEPS device_context device_tracer)
 cc_test(profiler_test SRCS profiler_test.cc DEPS profiler)
 
-nv_test(float16_gpu_test SRCS float16_test.cu)
-cc_test(float16_test SRCS float16_test.cc)
+nv_test(float16_gpu_test SRCS float16_test.cu DEPS lod_tensor)
+cc_test(float16_test SRCS float16_test.cc DEPS lod_tensor)

paddle/fluid/platform/cpu_helper.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/fluid/platform/cpu_helper.h"
+#include "paddle/fluid/platform/enforce.h"
+
+#ifdef PADDLE_WITH_MKLML
+#include "paddle/fluid/platform/dynload/mklml.h"
+#endif
+
+#ifdef PADDLE_USE_OPENBLAS
+#include <cblas.h>
+#endif
+
+namespace paddle {
+namespace platform {
+
+void SetNumThreads(int num_threads) {
+#ifdef PADDLE_USE_OPENBLAS
+  int real_num_threads = num_threads > 1 ? num_threads : 1;
+  openblas_set_num_threads(real_num_threads);
+#elif defined(PADDLE_WITH_MKLML)
+  int real_num_threads = num_threads > 1 ? num_threads : 1;
+  platform::dynload::MKL_Set_Num_Threads(real_num_threads);
+#else
+  PADDLE_ENFORCE(false, "To be implemented.");
+#endif
+}
+
+}  // namespace platform
+}  // namespace paddle

paddle/fluid/platform/cpu_helper.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 <stddef.h>
+
+namespace paddle {
+namespace platform {
+
+//! Set the number of threads in use.
+void SetNumThreads(int num_threads);
+
+}  // namespace platform
+}  // namespace paddle

paddle/fluid/platform/cpu_helper_test.cc

+/* Copyright (c) 2018 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/fluid/platform/cpu_helper.h"
+
+#include "gtest/gtest.h"
+
+TEST(CpuHelper, SetNumThread) {
+  paddle::platform::SetNumThreads(1);
+  paddle::platform::SetNumThreads(4);
+}

paddle/fluid/platform/device_context_test.cu

@@ -69,19 +69,3 @@ TEST(Device, DeviceContextPool) {
     ASSERT_NE(dev_ctx, nullptr);
   }
 }
-
-int main(int argc, char** argv) {
-  std::vector<paddle::platform::Place> places;
-
-  places.emplace_back(paddle::platform::CPUPlace());
-  int count = paddle::platform::GetCUDADeviceCount();
-  for (int i = 0; i < count; ++i) {
-    places.emplace_back(paddle::platform::CUDAPlace(i));
-  }
-
-  VLOG(0) << " DeviceCount " << count;
-  paddle::platform::DeviceContextPool::Init(places);
-
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}

paddle/fluid/platform/dynload/dynamic_loader.cc

@@ -36,8 +36,6 @@ DEFINE_string(cuda_dir, "",
 
 DEFINE_string(warpctc_dir, "", "Specify path for loading libwarpctc.so.");
 
-DEFINE_string(lapack_dir, "", "Specify path for loading liblapack.so.");
-
 DEFINE_string(nccl_dir, "",
               "Specify path for loading nccl library, such as libcublas, "
               "libcurand. For instance, /usr/local/cuda/lib64. If default, "
@@ -189,14 +187,6 @@ void* GetWarpCTCDsoHandle() {
 #endif
 }
 
-void* GetLapackDsoHandle() {
-#if defined(__APPLE__) || defined(__OSX__)
-  return GetDsoHandleFromSearchPath(FLAGS_lapack_dir, "liblapacke.dylib");
-#else
-  return GetDsoHandleFromSearchPath(FLAGS_lapack_dir, "liblapacke.so");
-#endif
-}
-
 void* GetNCCLDsoHandle() {
 #if defined(__APPLE__) || defined(__OSX__)
   return GetDsoHandleFromSearchPath(FLAGS_nccl_dir, "libnccl.dylib");

paddle/fluid/platform/dynload/dynamic_loader.h

@@ -23,7 +23,6 @@ void* GetCUDNNDsoHandle();
 void* GetCUPTIDsoHandle();
 void* GetCurandDsoHandle();
 void* GetWarpCTCDsoHandle();
-void* GetLapackDsoHandle();
 void* GetNCCLDsoHandle();
 void* GetTensorRtDsoHandle();
 void* GetMKLMLDsoHandle();

paddle/fluid/platform/float16_test.cc

@@ -13,8 +13,8 @@ limitations under the License. */
 #include <vector>
 
 #include "gtest/gtest.h"
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/lod_tensor.h"
+#include "paddle/fluid/platform/init.h"
 
 namespace paddle {
 namespace platform {

paddle/fluid/framework/init.cc → paddle/fluid/platform/init.cc

@@ -16,10 +16,10 @@ limitations under the License. */
 #include <stdexcept>
 #include <string>
 
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/operator.h"
-#include "paddle/fluid/operators/math/blas.h"
+#include "paddle/fluid/platform/cpu_helper.h"
 #include "paddle/fluid/platform/device_context.h"
+#include "paddle/fluid/platform/init.h"
 #include "paddle/fluid/platform/place.h"
 #include "paddle/fluid/string/piece.h"
 
@@ -115,7 +115,7 @@ void InitDevices(bool init_p2p, const std::vector<int> devices) {
   places.emplace_back(platform::CPUPlace());
   platform::DeviceContextPool::Init(places);
 #ifndef PADDLE_WITH_MKLDNN
-  operators::math::SetNumThreads(1);
+  platform::SetNumThreads(1);
 #endif
 }
 

paddle/fluid/framework/init_test.cc → paddle/fluid/platform/init_test.cc

@@ -13,8 +13,8 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 #include "gtest/gtest.h"
 
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/platform/device_context.h"
+#include "paddle/fluid/platform/init.h"
 
 TEST(InitDevices, CPU) {
   using paddle::framework::InitDevices;

paddle/fluid/pybind/CMakeLists.txt

@@ -2,13 +2,13 @@ if(WITH_PYTHON)
   if(WITH_AMD_GPU)
     hip_library(paddle_pybind SHARED
       SRCS pybind.cc exception.cc protobuf.cc const_value.cc recordio.cc
-      DEPS pybind python proto_desc memory executor prune init profiler feed_fetch_method
+      DEPS pybind python proto_desc memory executor prune profiler feed_fetch_method
            parallel_executor
       ${GLOB_OP_LIB})
   else()
     cc_library(paddle_pybind SHARED
       SRCS pybind.cc exception.cc protobuf.cc const_value.cc recordio.cc
-      DEPS pybind python proto_desc memory executor prune init profiler feed_fetch_method
+      DEPS pybind python proto_desc memory executor prune profiler feed_fetch_method
            parallel_executor
       ${GLOB_OP_LIB})
     if(NOT APPLE AND NOT ANDROID)

paddle/fluid/pybind/pybind.cc

@@ -25,7 +25,6 @@ limitations under the License. */
 #include "paddle/fluid/framework/executor.h"
 #include "paddle/fluid/framework/feed_fetch_method.h"
 #include "paddle/fluid/framework/framework.pb.h"
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/lod_rank_table.h"
 #include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/framework/lod_tensor_array.h"
@@ -37,6 +36,7 @@ limitations under the License. */
 #include "paddle/fluid/operators/activation_op.h"
 #include "paddle/fluid/operators/reader/lod_tensor_blocking_queue.h"
 #include "paddle/fluid/platform/enforce.h"
+#include "paddle/fluid/platform/init.h"
 #include "paddle/fluid/platform/place.h"
 #include "paddle/fluid/platform/profiler.h"
 #include "paddle/fluid/pybind/const_value.h"
@@ -297,7 +297,7 @@ All parameter, weight, gradient are variables in Paddle.
            py::return_value_policy::reference);
 
   py::class_<framework::ReaderHolder>(m, "Reader", "")
-      .def("reset", &framework::ReaderHolder::ReInit);
+      .def("reset", &framework::ReaderHolder::ResetAll);
 
   using LoDTensorBlockingQueue =
       ::paddle::operators::reader::LoDTensorBlockingQueue;

paddle/fluid/string/printf.h

@@ -83,6 +83,13 @@ void Fprintf(std::ostream& out, const char* fmt, const Args&... args) {
   tinyformat::vformat(out, fmt, tinyformat::makeFormatList(args...));
 }
 
+template <typename... Args>
+std::string Sprintf(const Args&... args) {
+  std::ostringstream oss;
+  Fprintf(oss, "");
+  return oss.str();
+}
+
 template <typename... Args>
 std::string Sprintf(const char* fmt, const Args&... args) {
   std::ostringstream oss;

paddle/fluid/string/printf_test.cc

@@ -27,4 +27,5 @@ TEST(StringPrintf, StringPrintf) {
   EXPECT_EQ(std::string("Wednesday, July 27, 14:44"),
             paddle::string::Sprintf("%s, %s %d, %.2d:%.2d", weekday, month, day,
                                     hour, min));
+  EXPECT_EQ(std::string(""), paddle::string::Sprintf());
 }

paddle/fluid/train/demo/demo_trainer.cc

@@ -15,11 +15,11 @@
 #include <fstream>
 
 #include "paddle/fluid/framework/executor.h"
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/framework/program_desc.h"
 #include "paddle/fluid/framework/tensor_util.h"
 #include "paddle/fluid/platform/device_context.h"
+#include "paddle/fluid/platform/init.h"
 #include "paddle/fluid/platform/place.h"
 
 namespace paddle {

paddle/legacy/gserver/gradientmachines/MultiGradientMachine.cpp

@@ -532,6 +532,7 @@ void TrainerThread::computeThread() {
         break;
     }
   }
+  hl_fini();
 }
 
 void TrainerThread::prefetch() {
@@ -651,6 +652,7 @@ void TrainerThread::copyGradToBufferThread() {
     }
     partnerThread->notifyGradientCollect(pid);
   }
+  hl_fini();
 }
 
 void TrainerThread::gradCollectThread() {
@@ -693,6 +695,7 @@ void TrainerThread::gradCollectThread() {
       notifyCopyGradToBuffer(pid);
     }
   }
+  hl_fini();
 }
 
 void TrainerThread::doCallback(int pid) {
@@ -741,6 +744,7 @@ void TrainerThread::valueDispatchThread() {
 
     thread->notifyValueReady(pid);
   }
+  hl_fini();
 }
 
 void TrainerThread::notifyValueReady(int paramId) {

paddle/legacy/gserver/gradientmachines/ParallelNeuralNetwork.cpp

@@ -197,6 +197,7 @@ void ParallelThread::computeThread() {
       job_work.layer_->markAllInputGrad();
     }
   }
+  hl_fini();
 }
 
 void ParallelThread::start() {

paddle/scripts/paddle_build.sh

@@ -312,6 +312,20 @@ EOF
     fi
 }
 
+function assert_api_not_changed() {
+    mkdir -p ${PADDLE_ROOT}/build/.check_api_workspace
+    cd ${PADDLE_ROOT}/build/.check_api_workspace
+    virtualenv .env
+    source .env/bin/activate
+    pip install ${PADDLE_ROOT}/build/python/dist/*whl
+    curl ${PADDLE_API_SPEC_URL:-https://raw.githubusercontent.com/PaddlePaddle/FluidAPISpec/master/API.spec} \
+        > origin.spec
+    python ${PADDLE_ROOT}/tools/print_signatures.py paddle.fluid > new.spec
+    python ${PADDLE_ROOT}/tools/diff_api.py origin.spec new.spec
+    deactivate
+}
+
+
 function single_test() {
     TEST_NAME=$1
     if [ -z "${TEST_NAME}" ]; then
@@ -550,6 +564,7 @@ function main() {
       cicheck)
         cmake_gen ${PYTHON_ABI:-""}
         build
+        assert_api_not_changed
         run_test
         gen_capi_package
         gen_fluid_inference_lib

paddle/testing/CMakeLists.txt

@@ -6,6 +6,6 @@ if(WITH_TESTING)
   add_library(paddle_test_util STATIC TestUtil.cpp)
   add_dependencies(paddle_test_util paddle_proto ${external_project_dependencies})
   if(NOT MOBILE_INFERENCE)
-    cc_library(paddle_gtest_main SRCS paddle_gtest_main.cc DEPS init memory gtest gflags)
+    cc_library(paddle_gtest_main SRCS paddle_gtest_main.cc DEPS device_context memory gtest gflags)
   endif()
 endif()

paddle/testing/paddle_gtest_main.cc

@@ -16,8 +16,8 @@ limitations under the License. */
 
 #include "gflags/gflags.h"
 #include "gtest/gtest.h"
-#include "paddle/fluid/framework/init.h"
 #include "paddle/fluid/memory/memory.h"
+#include "paddle/fluid/platform/init.h"
 
 int main(int argc, char** argv) {
   testing::InitGoogleTest(&argc, argv);

python/paddle/fluid/framework.py

@@ -26,7 +26,7 @@ except ImportError, e:
         """NOTE: You may need to run \"export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH\"
     if you encounters \"libmkldnn.so not found\" errors. If you have python
     installed in other directory, replace \"/usr/local/lib\" with your own
-    directory. The original error is: """ % str(e))
+    directory. The original error is: \n""" + e.message)
 except Exception, e:
     raise e
 import unique_name

python/paddle/fluid/layers/io.py

@@ -376,9 +376,6 @@ def open_recordio_file(filename,
     if pass_num > 1:
         main_prog_var = multi_pass(reader=main_prog_var, pass_num=pass_num)
 
-    if for_parallel:
-        main_prog_var = parallel(reader=main_prog_var)
-
     return monkey_patch_reader_methods(main_prog_var)
 
 
@@ -610,9 +607,6 @@ def open_files(filenames,
         main_prog_reader = multi_pass(
             reader=main_prog_reader, pass_num=pass_num)
 
-    if for_parallel:
-        main_prog_reader = parallel(reader=main_prog_reader)
-
     return monkey_patch_reader_methods(main_prog_reader)
 
 
@@ -728,11 +722,6 @@ def multi_pass(reader, pass_num):
         'create_multi_pass_reader', reader, {'pass_num': int(pass_num)})
 
 
-def parallel(reader):
-    return __create_shared_decorated_reader__('create_threaded_reader', reader,
-                                              {})
-
-
 def read_file(reader):
     """
     Execute the given reader and get data via it.

python/paddle/fluid/tests/test_mnist_if_else_op.py → python/paddle/fluid/tests/test_if_else_op.py

@@ -14,10 +14,11 @@
 
 import paddle
 import paddle.fluid.layers as layers
-from paddle.fluid.framework import Program, program_guard, default_main_program, default_startup_program
+from paddle.fluid.framework import Program, program_guard
 from paddle.fluid.executor import Executor
 from paddle.fluid.optimizer import MomentumOptimizer
 import paddle.fluid.core as core
+import paddle.fluid as fluid
 import unittest
 import numpy as np
 
@@ -31,14 +32,13 @@ class TestMNISTIfElseOp(unittest.TestCase):
 
             label = layers.data(name='y', shape=[1], dtype='int64')
 
-            limit = layers.fill_constant_batch_size_like(
-                input=label, dtype='int64', shape=[1], value=5.0)
+            limit = layers.fill_constant(shape=[1], dtype='int64', value=5)
             cond = layers.less_than(x=label, y=limit)
             true_image, false_image = layers.split_lod_tensor(
                 input=image, mask=cond)
 
             true_out = layers.create_tensor(dtype='float32')
-            true_cond = layers.ConditionalBlock([true_image])
+            true_cond = layers.ConditionalBlock([cond])
 
             with true_cond.block():
                 hidden = layers.fc(input=true_image, size=100, act='tanh')
@@ -46,7 +46,7 @@ class TestMNISTIfElseOp(unittest.TestCase):
                 layers.assign(input=prob, output=true_out)
 
             false_out = layers.create_tensor(dtype='float32')
-            false_cond = layers.ConditionalBlock([false_image])
+            false_cond = layers.ConditionalBlock([cond])
 
             with false_cond.block():
                 hidden = layers.fc(input=false_image, size=200, act='tanh')
@@ -64,7 +64,7 @@ class TestMNISTIfElseOp(unittest.TestCase):
         train_reader = paddle.batch(
             paddle.reader.shuffle(
                 paddle.dataset.mnist.train(), buf_size=8192),
-            batch_size=200)
+            batch_size=10)
 
         place = core.CPUPlace()
         exe = Executor(place)
@@ -94,8 +94,7 @@ class TestMNISTIfElseOp(unittest.TestCase):
 
             label = layers.data(name='y', shape=[1], dtype='int64')
 
-            limit = layers.fill_constant_batch_size_like(
-                input=label, dtype='int64', shape=[1], value=5.0)
+            limit = layers.fill_constant(shape=[1], dtype='int64', value=5)
             cond = layers.less_than(x=label, y=limit)
             ie = layers.IfElse(cond)
 
@@ -125,7 +124,7 @@ class TestMNISTIfElseOp(unittest.TestCase):
         place = core.CPUPlace()
         exe = Executor(place)
 
-        exe.run(kwargs['startup_program'])
+        exe.run(startup_prog)
         PASS_NUM = 100
         for pass_id in range(PASS_NUM):
             for data in train_reader():
@@ -133,7 +132,7 @@ class TestMNISTIfElseOp(unittest.TestCase):
                 y_data = np.array(map(lambda x: x[1], data)).astype("int64")
                 y_data = y_data.reshape((y_data.shape[0], 1))
 
-                outs = exe.run(kwargs['main_program'],
+                outs = exe.run(prog,
                                feed={'x': x_data,
                                      'y': y_data},
                                fetch_list=[avg_loss])
@@ -143,6 +142,67 @@ class TestMNISTIfElseOp(unittest.TestCase):
         self.assertFalse(True)
 
 
+class TestIfElse(unittest.TestCase):
+    def set_test_case(self):
+        # condiction is: self.data < self.cond_value
+        self.cond_value = 0.5
+        self.data = np.random.rand(25, 1).astype(np.float32)
+
+    def compare_ifelse_op_and_numpy(self, place):
+        self.set_test_case()
+
+        prog = Program()
+        startup_prog = Program()
+        with program_guard(prog, startup_prog):
+            src = layers.data(name='data', shape=[1], dtype='float32')
+            cond = layers.fill_constant(
+                [1], dtype='float32', value=self.cond_value)
+            ifcond = layers.less_than(x=src, y=cond)
+            ie = layers.IfElse(ifcond)
+            with ie.true_block():
+                true_target = ie.input(src)
+                ie.output(true_target)
+
+            with ie.false_block():
+                false_target = ie.input(src)
+                ie.output(false_target)
+            if_out = ie()
+            out = layers.reduce_sum(if_out)
+
+            exe = fluid.Executor(place)
+            exe.run(fluid.default_startup_program())
+            fetch_list = [out]
+            o1, = exe.run(fluid.default_main_program(),
+                          feed={'data': self.data},
+                          fetch_list=[out])
+            o2 = np.sum(self.data)
+            self.assertTrue(
+                np.allclose(
+                    o1, o2, atol=1e-8),
+                "IfElse result : " + str(o1) + "\n Numpy result :" + str(o2))
+
+    def test_cpu(self):
+        self.compare_ifelse_op_and_numpy(fluid.CPUPlace())
+
+    def test_cuda(self):
+        if not core.is_compiled_with_cuda():
+            return
+        self.compare_ifelse_op_and_numpy(fluid.CUDAPlace(0))
+
+
+class TestIfElseTrueBranch(TestIfElse):
+    def set_test_case(self):
+        # condiction is: self.data < self.cond_value
+        self.cond_value = 10.
+        self.data = np.random.rand(25, 1).astype(np.float32)
+
+
+class TestIfElseFalseBranch(TestIfElse):
+    def set_test_case(self):
+        # condiction is: self.data < self.cond_value
+        self.cond_value = -10.
+        self.data = np.random.rand(25, 1).astype(np.float32)
+
+
 if __name__ == '__main__':
-    # temp disable if else unittest since it could be buggy.
-    exit(0)
+    unittest.main()

python/paddle/fluid/tests/unittests/test_data_balance.py

@@ -103,8 +103,12 @@ class TestDataBalance(unittest.TestCase):
             exe = fluid.Executor(place)
             exe.run(startup_prog)
 
+            build_strategy = fluid.BuildStrategy()
+            build_strategy.enable_data_balance = True
             parallel_exe = fluid.ParallelExecutor(
-                use_cuda=self.use_cuda, main_program=main_prog)
+                use_cuda=self.use_cuda,
+                main_program=main_prog,
+                build_strategy=build_strategy)
 
             if (parallel_exe.device_count > self.batch_size):
                 print("WARNING: Unittest TestDataBalance skipped. \
@@ -145,9 +149,12 @@ class TestDataBalance(unittest.TestCase):
             place = fluid.CUDAPlace(0) if self.use_cuda else fluid.CPUPlace()
             exe = fluid.Executor(place)
             exe.run(startup_prog)
-
+            build_strategy = fluid.BuildStrategy()
+            build_strategy.enable_data_balance = True
             parallel_exe = fluid.ParallelExecutor(
-                use_cuda=self.use_cuda, main_program=main_prog)
+                use_cuda=self.use_cuda,
+                main_program=main_prog,
+                build_strategy=build_strategy)
 
             if (parallel_exe.device_count > self.batch_size):
                 print("WARNING: Unittest TestDataBalance skipped. \

python/paddle/fluid/tests/unittests/test_fake_dequantize_op.py

@@ -40,7 +40,6 @@ class TestFakeDequantizeMaxAbsOp(OpTest):
         self.op_type = "fake_dequantize_max_abs"
         x = np.random.randn(31, 65).astype("float32")
         yq, scale = quantize_max_abs(x, self.num_bits)
-        print 'scale ', scale
         ydq = dequantize_max_abs(yq, self.num_bits, scale)
 
         self.inputs = {'X': yq}