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

.gitignore

@@ -28,3 +28,4 @@ third_party/
 build_*
 # clion workspace.
 cmake-build-*
+model_test

CMakeLists.txt

@@ -69,6 +69,7 @@ option(WITH_ANAKIN      "Compile with Anakin library"                   OFF)
 option(WITH_GRPC     "Use grpc as the default rpc framework"            ${WITH_DISTRIBUTE})
 option(WITH_BRPC_RDMA     "Use brpc rdma as the rpc protocal"           OFF)
 option(WITH_INFERENCE    "Compile fluid inference library"              ON)
+option(ON_INFER         "Turn on inference optimization."               OFF)
 option(WITH_INFERENCE_API_TEST   "Test fluid inference high-level api interface"  OFF)
 option(WITH_SYSTEM_BLAS   "Use system blas library"           OFF)
 option(PY_VERSION       "Compile PaddlePaddle with python3 support"     ${PY_VERSION})
@@ -179,6 +180,7 @@ include(external/eigen)     # download eigen3
 include(external/pybind11)  # download pybind11
 include(external/cares)
 include(external/cub)
+include(external/xxhash)    # download xxhash
 
 if (NOT WIN32)
 # there is no official support of snappystream, warpctc, nccl, cupti in windows
@@ -301,3 +303,8 @@ if(WITH_DOC)
     find_python_module(recommonmark REQUIRED)
     add_subdirectory(doc)
 endif()
+
+if (ON_INFER)
+    message(WARNING "On inference mode, will take place some specific optimization.")
+    add_definitions(-DPADDLE_ON_INFERENCE)
+endif()

Dockerfile

@@ -75,14 +75,14 @@ RUN pip3 install -U wheel && \
     pip3 install -U docopt PyYAML sphinx==1.5.6 && \
     pip3 install sphinx-rtd-theme==0.1.9 recommonmark && \
     easy_install -U pip && \
-    pip install -U wheel && \
+    pip install -U pip setuptools wheel && \
     pip install -U docopt PyYAML sphinx==1.5.6 && \
     pip install sphinx-rtd-theme==0.1.9 recommonmark
 
-RUN pip3 install pre-commit 'ipython==5.3.0' && \
+RUN pip3 install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
     pip3 install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
     pip3 install opencv-python && \
-    pip install pre-commit 'ipython==5.3.0' && \
+    pip install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
     pip install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
     pip install opencv-python
 

cmake/external/xxhash.cmake

+INCLUDE(ExternalProject)
+
+set(XXHASH_SOURCE_DIR ${THIRD_PARTY_PATH}/xxhash)
+set(XXHASH_INSTALL_DIR ${THIRD_PARTY_PATH}/install/xxhash)
+set(XXHASH_INCLUDE_DIR "${XXHASH_INSTALL_DIR}/include")
+
+IF(WITH_STATIC_LIB)
+  SET(BUILD_CMD make lib)
+ELSE()
+  SET(BUILD_CMD sed -i "s/-Wstrict-prototypes -Wundef/-Wstrict-prototypes -Wundef -fPIC/g" ${XXHASH_SOURCE_DIR}/src/extern_xxhash/Makefile && make lib)
+ENDIF()
+
+ExternalProject_Add(
+    extern_xxhash
+    ${EXTERNAL_PROJECT_LOG_ARGS}
+    GIT_REPOSITORY  "https://github.com/Cyan4973/xxHash"
+    GIT_TAG         "v0.6.5"
+    PREFIX          ${XXHASH_SOURCE_DIR}
+    DOWNLOAD_NAME   "xxhash"
+    UPDATE_COMMAND  ""
+    CONFIGURE_COMMAND ""
+    BUILD_IN_SOURCE 1
+    PATCH_COMMAND
+    BUILD_COMMAND     ${BUILD_CMD}
+    INSTALL_COMMAND   export PREFIX=${XXHASH_INSTALL_DIR}/ && make install
+    TEST_COMMAND      ""
+)
+
+set(XXHASH_LIBRARIES "${XXHASH_INSTALL_DIR}/lib/libxxhash.a")
+INCLUDE_DIRECTORIES(${XXHASH_INCLUDE_DIR})
+
+add_library(xxhash STATIC IMPORTED GLOBAL)
+set_property(TARGET xxhash PROPERTY IMPORTED_LOCATION ${XXHASH_LIBRARIES})
+include_directories(${XXHASH_INCLUDE_DIR})
+add_dependencies(xxhash extern_xxhash)
+
+LIST(APPEND external_project_dependencies xxhash)
+
+IF(WITH_C_API)
+  INSTALL(DIRECTORY ${XXHASH_INCLUDE_DIR} DESTINATION third_party/xxhash)
+  IF(ANDROID)
+    INSTALL(FILES ${XXHASH_LIBRARIES} DESTINATION third_party/xxhash/lib/${ANDROID_ABI})
+  ELSE()
+    INSTALL(FILES ${XXHASH_LIBRARIES} DESTINATION third_party/xxhash/lib)
+  ENDIF()
+ENDIF()

cmake/inference_lib.cmake

@@ -14,6 +14,9 @@
 
 # make package for paddle fluid shared and static library
 function(copy TARGET)
+    if (NOT ON_INFER)
+      message(WARNING "Turn on the ON_INFER flag when building inference_lib only.")
+    endif()
     set(options "")
     set(oneValueArgs "")
     set(multiValueArgs SRCS DSTS DEPS)
@@ -31,7 +34,7 @@ function(copy TARGET)
     foreach(index RANGE ${len})
         list(GET copy_lib_SRCS ${index} src)
         list(GET copy_lib_DSTS ${index} dst)
-        add_custom_command(TARGET ${TARGET} PRE_BUILD 
+        add_custom_command(TARGET ${TARGET} PRE_BUILD
           COMMAND mkdir -p "${dst}"
           COMMAND cp -r "${src}" "${dst}"
           COMMENT "copying ${src} -> ${dst}")
@@ -67,6 +70,13 @@ copy(boost_lib
   DEPS boost
 )
 
+set(dst_dir "${FLUID_INSTALL_DIR}/third_party/install/xxhash")
+copy(xxhash_lib
+  SRCS ${XXHASH_INCLUDE_DIR} ${XXHASH_LIBRARIES}
+  DSTS ${dst_dir} ${dst_dir}/lib
+  DEPS xxhash
+)
+
 if(NOT PROTOBUF_FOUND)
     set(dst_dir "${FLUID_INSTALL_DIR}/third_party/install/protobuf")
     copy(protobuf_lib
@@ -186,7 +196,7 @@ copy(cmake_cache
   DSTS ${FLUID_INSTALL_DIR})
 
 # This command generates a complete fluid library for both train and inference
-add_custom_target(fluid_lib_dist DEPENDS ${fluid_lib_dist_dep}) 
+add_custom_target(fluid_lib_dist DEPENDS ${fluid_lib_dist_dep})
 
 # Following commands generate a inference-only fluid library
 # third_party, version.txt and CMakeCache.txt are the same position with ${FLUID_INSTALL_DIR}

paddle/fluid/API.spec

@@ -86,7 +86,7 @@ paddle.fluid.layers.reduce_prod ArgSpec(args=['input', 'dim', 'keep_dim', 'name'
 paddle.fluid.layers.sequence_first_step ArgSpec(args=['input'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.sequence_last_step ArgSpec(args=['input'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.sequence_slice ArgSpec(args=['input', 'offset', 'length', 'name'], varargs=None, keywords=None, defaults=(None,))
-paddle.fluid.layers.dropout ArgSpec(args=['x', 'dropout_prob', 'is_test', 'seed', 'name'], varargs=None, keywords=None, defaults=(False, None, None))
+paddle.fluid.layers.dropout ArgSpec(args=['x', 'dropout_prob', 'is_test', 'seed', 'name', 'dropout_implementation'], varargs=None, keywords=None, defaults=(False, None, None, 'downgrade_in_infer'))
 paddle.fluid.layers.split ArgSpec(args=['input', 'num_or_sections', 'dim', 'name'], varargs=None, keywords=None, defaults=(-1, None))
 paddle.fluid.layers.ctc_greedy_decoder ArgSpec(args=['input', 'blank', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.edit_distance ArgSpec(args=['input', 'label', 'normalized', 'ignored_tokens'], varargs=None, keywords=None, defaults=(True, None))
@@ -107,7 +107,7 @@ paddle.fluid.layers.softmax_with_cross_entropy ArgSpec(args=['logits', 'label',
 paddle.fluid.layers.smooth_l1 ArgSpec(args=['x', 'y', 'inside_weight', 'outside_weight', 'sigma'], varargs=None, keywords=None, defaults=(None, None, None))
 paddle.fluid.layers.one_hot ArgSpec(args=['input', 'depth'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.layers.autoincreased_step_counter ArgSpec(args=['counter_name', 'begin', 'step'], varargs=None, keywords=None, defaults=(None, 1, 1))
-paddle.fluid.layers.reshape ArgSpec(args=['x', 'shape', 'actual_shape', 'act', 'inplace', 'name'], varargs=None, keywords=None, defaults=(None, None, True, None))
+paddle.fluid.layers.reshape ArgSpec(args=['x', 'shape', 'actual_shape', 'act', 'inplace', 'name'], varargs=None, keywords=None, defaults=(None, None, False, None))
 paddle.fluid.layers.squeeze ArgSpec(args=['input', 'axes', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.unsqueeze ArgSpec(args=['input', 'axes', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.lod_reset ArgSpec(args=['x', 'y', 'target_lod'], varargs=None, keywords=None, defaults=(None, None))
@@ -174,7 +174,9 @@ paddle.fluid.layers.mean ArgSpec(args=['x', 'name'], varargs=None, keywords=None
 paddle.fluid.layers.mul ArgSpec(args=['x', 'y', 'x_num_col_dims', 'y_num_col_dims', 'name'], varargs=None, keywords=None, defaults=(1, 1, None))
 paddle.fluid.layers.sigmoid_cross_entropy_with_logits ArgSpec(args=['x', 'label', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.maxout ArgSpec(args=['x', 'groups', 'name'], varargs=None, keywords=None, defaults=(None,))
+paddle.fluid.layers.sequence_reverse ArgSpec(args=['x', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.affine_channel ArgSpec(args=['x', 'scale', 'bias', 'data_layout', 'name'], varargs=None, keywords=None, defaults=(None, None, 'NCHW', None))
+paddle.fluid.layers.hash ArgSpec(args=['input', 'hash_size', 'num_hash', 'name'], varargs=None, keywords=None, defaults=(1, None))
 paddle.fluid.layers.data ArgSpec(args=['name', 'shape', 'append_batch_size', 'dtype', 'lod_level', 'type', 'stop_gradient'], varargs=None, keywords=None, defaults=(True, 'float32', 0, VarType.LOD_TENSOR, True))
 paddle.fluid.layers.open_files ArgSpec(args=['filenames', 'shapes', 'lod_levels', 'dtypes', 'thread_num', 'buffer_size', 'pass_num', 'is_test'], varargs=None, keywords=None, defaults=(None, None, 1, None))
 paddle.fluid.layers.read_file ArgSpec(args=['reader'], varargs=None, keywords=None, defaults=None)

paddle/fluid/framework/ir/graph_helper.cc

@@ -120,19 +120,25 @@ size_t GraphNum(const Graph &graph) {
   std::deque<ir::Node *> q_nodes;
   std::vector<std::unordered_set<ir::Node *>> graph_nodes;
   std::unordered_set<ir::Node *> g_nodes;
+  // q_set used to record records in the queue.
+  std::unordered_set<ir::Node *> q_set;
   size_t graph_count = 0;
 
-  auto traverse_nodes = [&visited_nodes,
-                         &q_nodes](const std::vector<ir::Node *> &nodes) {
-    std::copy_if(
-        nodes.begin(), nodes.end(), std::back_inserter(q_nodes),
-        [&visited_nodes](Node *node) { return !visited_nodes.count(node); });
+  auto traverse_nodes = [&visited_nodes, &q_nodes,
+                         &q_set](const std::vector<ir::Node *> &nodes) {
+    for (auto n : nodes) {
+      if (visited_nodes.count(n) == 0 && q_set.count(n) == 0) {
+        q_nodes.push_back(n);
+        q_set.insert(n);
+      }
+    }
   };
 
   while (visited_nodes.size() != nodes.size()) {
     if (!q_nodes.empty()) {
       auto cur_node = q_nodes.front();
       q_nodes.pop_front();
+      q_set.erase(cur_node);
       visited_nodes.insert(cur_node);
       g_nodes.insert(cur_node);
       traverse_nodes(cur_node->inputs);
@@ -146,6 +152,7 @@ size_t GraphNum(const Graph &graph) {
       for (auto &n : nodes) {
         if (visited_nodes.count(n) == 0) {
           q_nodes.push_back(n);
+          q_set.insert(n);
           break;
         }
       }

paddle/fluid/framework/lod_tensor_array.h

@@ -18,6 +18,82 @@ limitations under the License. */
 
 namespace paddle {
 namespace framework {
+
+// NOTE The vector<LoDTensor> can't be replaced with the class LoDTensorArray
+// directly, because there are many vector<LoDTensor> used accross the project,
+// and some of them are treated as LoDTensorArray.
+#if !defined(PADDLE_ON_INFERENCE)
+
 using LoDTensorArray = std::vector<LoDTensor>;
-}
+
+#else  // !PADDLE_ON_INFERENCE
+
+#pragma message "LoDTensorArray is replaced with the inference one."
+/*
+ * A LoDTensorArray which will not deallocate buffer when resized, fix the data
+ * diff in inference, and more performance friendly in the concurrency
+ * scenerios.
+ */
+class LoDTensorArray {
+ public:
+  LoDTensorArray() = default;
+
+  using iterator = std::vector<LoDTensor>::iterator;
+  using const_iterator = std::vector<LoDTensor>::const_iterator;
+
+  const_iterator begin() const { return array_.begin(); }
+  const_iterator end() const { return array_.begin() + size_; }
+  iterator begin() { return array_.begin(); }
+  iterator end() { return array_.begin() + size_; }
+
+  void push_back(const LoDTensor& x) {
+    if (size_ < array_.size()) {
+      array_[size_++] = x;
+    } else {
+      array_.push_back(x);
+      ++size_;
+    }
+  }
+  void resize(size_t size) {
+    if (array_.size() < size) {
+      array_.resize(size);
+    }
+    size_ = size;
+  }
+
+  void emplace_back() { array_.emplace_back(); }
+
+  void emplace_back(LoDTensor&& x) { array_.emplace_back(std::move(x)); }
+
+  LoDTensor& back() { return array_.back(); }
+
+  size_t space() const { return array_.size(); }
+
+  void reserve(size_t size) {
+    // Naive warning to tell user this array might be to large. The memory and
+    // buffer used by this TensorArray will not be deleted during the training
+    // and inference phase, so attention not to make it expand too long.
+    if (size > 800UL) {
+      LOG(WARNING) << "TensorArray has more than 800 items";
+    }
+    array_.reserve(size);
+  }
+
+  bool empty() const { return size_ == 0UL; }
+  void clear() { size_ = 0UL; }
+
+  LoDTensor& operator[](size_t id) { return array_[id]; }
+  const LoDTensor& operator[](size_t id) const { return array_[id]; }
+  LoDTensor& at(size_t id) { return array_.at(id); }
+  const LoDTensor& at(size_t id) const { return array_.at(id); }
+
+  size_t size() const { return size_; }
+
+ private:
+  size_t size_{0};
+  std::vector<LoDTensor> array_;
+};
+#endif  // !PADDLE_ON_INFERENCE
+
+}  // namespace framework
 }  // namespace paddle

paddle/fluid/framework/mixed_vector.h

@@ -542,6 +542,33 @@ class CPUVector : public std::vector<T, std::allocator<T>> {
     this->reserve(this->size() + size_t(end - begin));
     this->insert(this->end(), begin, end);
   }
+
+  const T *CUDAData(platform::Place place) const {
+    PADDLE_THROW(
+        "Vector::CUDAData() method is not supported in CPU-only version");
+  }
+
+  T *CUDAMutableData(platform::Place place) {
+    PADDLE_THROW(
+        "Vector::CUDAMutableData() method is not supported in CPU-only "
+        "version");
+  }
+
+  const T *Data(platform::Place place) const {
+    PADDLE_ENFORCE(
+        platform::is_cpu_place(place),
+        "Vector::Data() method is not supported when not in CPUPlace");
+    return this->data();
+  }
+
+  T *MutableData(platform::Place place) {
+    PADDLE_ENFORCE(
+        platform::is_cpu_place(place),
+        "Vector::MutableData() method is not supported when not in CPUPlace");
+    return this->data();
+  }
+
+  const void *Handle() const { return static_cast<const void *>(this); }
 };
 
 template <typename T>

paddle/fluid/framework/naive_executor.cc

@@ -146,22 +146,5 @@ void NaiveExecutor::CleanFeedFetchOps() {
   ops_.swap(ops);
 }
 
-void NaiveExecutor::EnableMKLDNN(const ProgramDesc &program) {
-#ifdef PADDLE_WITH_MKLDNN
-  VLOG(3) << "use_mkldnn=True";
-  for (size_t block_id = 0; block_id < program.Size(); ++block_id) {
-    auto *block = const_cast<ProgramDesc &>(program).MutableBlock(block_id);
-    for (auto *op : block->AllOps()) {
-      if (op->HasAttr("use_mkldnn")) {
-        op->SetAttr("use_mkldnn", true);
-      }
-    }
-  }
-#else
-  LOG(WARNING)
-      << "'MKLDNN' is not supported, Please re-compile with WITH_MKLDNN option";
-#endif
-}
-
 }  // namespace framework
 }  // namespace paddle

paddle/fluid/framework/naive_executor.h

@@ -48,8 +48,6 @@ class NaiveExecutor {
 
   void CleanFeedFetchOps();
 
-  void EnableMKLDNN(const ProgramDesc& program);
-
  protected:
   void CreateVariables(const ProgramDesc& desc, Scope* scope, int block_id);
 

paddle/fluid/framework/op_proto_maker.h

@@ -28,12 +28,12 @@ enum class OpRole {
   kBackward = 0x0001,
   kOptimize = 0x0002,
   // RPC role is for send/recv releated op
-  kRPC = 0x0003,
+  kRPC = 0x0004,
   // Dist role is for split_byref/split_selected_rows/concat
   // used for distributed training.
-  kDist = 0x0004,
+  kDist = 0x0008,
   // Tag all learning rate scheduler operators.
-  kLRSched = 0x0005,
+  kLRSched = 0x0016,
 
   kLoss = 0x0100,
   // The default value of op's role. This should be only used for unittests and

paddle/fluid/framework/parallel_executor.cc

@@ -156,6 +156,12 @@ ParallelExecutor::ParallelExecutor(
                            params, member_->local_scopes_, member_->use_cuda_);
 #endif
 
+  // If the loss_var_name is given, the number of graph should be only one.
+  if (loss_var_name.size()) {
+    PADDLE_ENFORCE_EQ(ir::GraphNum(*graph), 1,
+                      "The number of graph should be only one");
+  }
+
   if (exec_strategy.type_ == ExecutionStrategy::kDefault) {
     member_->executor_.reset(new details::ThreadedSSAGraphExecutor(
         exec_strategy, member_->local_scopes_, places, std::move(graph)));

paddle/fluid/framework/scope.h

@@ -78,6 +78,8 @@ class Scope {
   /// Drop all kids scopes belonged to this scope.
   void DropKids();
 
+  std::list<Scope*>& kids() const { return kids_; }
+
   /// Find if a scope exists in the kid scopes
   bool HasKid(const Scope* scope) const;
 

paddle/fluid/framework/threadpool.cc

@@ -25,7 +25,6 @@ DEFINE_int32(dist_threadpool_size, 0,
 
 namespace paddle {
 namespace framework {
-
 std::unique_ptr<ThreadPool> ThreadPool::threadpool_(nullptr);
 std::once_flag ThreadPool::init_flag_;
 
@@ -47,8 +46,7 @@ void ThreadPool::Init() {
   }
 }
 
-ThreadPool::ThreadPool(int num_threads)
-    : total_threads_(num_threads), idle_threads_(num_threads), running_(true) {
+ThreadPool::ThreadPool(int num_threads) : running_(true) {
   threads_.resize(num_threads);
   for (auto& thread : threads_) {
     // TODO(Yancey1989): binding the thread on the specify CPU number
@@ -59,6 +57,7 @@ ThreadPool::ThreadPool(int num_threads)
 ThreadPool::~ThreadPool() {
   {
     // notify all threads to stop running
+    std::lock_guard<std::mutex> l(mutex_);
     running_ = false;
     scheduled_.notify_all();
   }
@@ -69,36 +68,24 @@ ThreadPool::~ThreadPool() {
   }
 }
 
-void ThreadPool::Wait() {
-  std::unique_lock<std::mutex> lock(mutex_);
-  completed_.wait(lock, [=] { return Done() == true; });
-}
-
 void ThreadPool::TaskLoop() {
-  while (running_) {
+  while (true) {
     std::unique_lock<std::mutex> lock(mutex_);
-    scheduled_.wait(lock, [=] { return !tasks_.empty() || !running_; });
 
-    if (!running_) {
-      break;
+    scheduled_.wait(
+        lock, [this] { return !this->tasks_.empty() || !this->running_; });
+
+    if (!running_ || tasks_.empty()) {
+      return;
     }
+
     // pop a task from the task queue
     auto task = std::move(tasks_.front());
     tasks_.pop();
-
-    --idle_threads_;
     lock.unlock();
 
     // run the task
     task();
-
-    {
-      std::unique_lock<std::mutex> lock(mutex_);
-      ++idle_threads_;
-      if (Done()) {
-        completed_.notify_all();
-      }
-    }
   }
 }
 

paddle/fluid/framework/threadpool.h

@@ -57,15 +57,6 @@ class ThreadPool {
 
   ~ThreadPool();
 
-  // Returns the number of threads created by the constructor.
-  size_t Threads() const { return total_threads_; }
-
-  // Returns the number of currently idle threads.
-  size_t IdleThreads() {
-    std::unique_lock<std::mutex> lock(mutex_);
-    return idle_threads_;
-  }
-
   // Run pushes a function to the task queue and returns a std::future
   // object.  To wait for the completion of the task, call
   // std::future::wait().
@@ -94,25 +85,13 @@ class ThreadPool {
     });
     std::future<std::unique_ptr<platform::EnforceNotMet>> f = task.get_future();
     tasks_.push(std::move(task));
-    lock.unlock();
     scheduled_.notify_one();
     return f;
   }
 
-  // Wait until all the tasks are completed.
-  void Wait();
-
  private:
   DISABLE_COPY_AND_ASSIGN(ThreadPool);
 
-  // If the task queue is empty and avaialbe is equal to the number of
-  // threads, means that all tasks are completed.  Note: this function
-  // is not thread-safe.  Returns true if all tasks are completed.
-  // Note: don't delete the data member total_threads_ and use
-  // threads_.size() instead; because you'd need to lock the mutex
-  // before accessing threads_.
-  bool Done() { return tasks_.empty() && idle_threads_ == total_threads_; }
-
   // The constructor starts threads to run TaskLoop, which retrieves
   // and runs tasks from the queue.
   void TaskLoop();
@@ -125,14 +104,11 @@ class ThreadPool {
   static std::once_flag init_flag_;
 
   std::vector<std::unique_ptr<std::thread>> threads_;
-  const size_t total_threads_;
-  size_t idle_threads_;
 
   std::queue<Task> tasks_;
   std::mutex mutex_;
   bool running_;
   std::condition_variable scheduled_;
-  std::condition_variable completed_;
 };
 
 class ThreadPoolIO : ThreadPool {

paddle/fluid/framework/threadpool_test.cc

@@ -19,10 +19,11 @@ limitations under the License. */
 
 namespace framework = paddle::framework;
 
-void do_sum(framework::ThreadPool* pool, std::atomic<int>* sum, int cnt) {
-  std::vector<std::future<void>> fs;
+void do_sum(std::vector<std::future<void>>* fs, std::mutex* mu,
+            std::atomic<int>* sum, int cnt) {
   for (int i = 0; i < cnt; ++i) {
-    fs.push_back(framework::Async([sum]() { sum->fetch_add(1); }));
+    std::lock_guard<std::mutex> l(*mu);
+    fs->push_back(framework::Async([sum]() { sum->fetch_add(1); }));
   }
 }
 
@@ -40,18 +41,21 @@ TEST(ThreadPool, ConcurrentInit) {
 }
 
 TEST(ThreadPool, ConcurrentRun) {
-  framework::ThreadPool* pool = framework::ThreadPool::GetInstance();
   std::atomic<int> sum(0);
   std::vector<std::thread> threads;
+  std::vector<std::future<void>> fs;
+  std::mutex fs_mu;
   int n = 50;
   // sum = (n * (n + 1)) / 2
   for (int i = 1; i <= n; ++i) {
-    std::thread t(do_sum, pool, &sum, i);
+    std::thread t(do_sum, &fs, &fs_mu, &sum, i);
     threads.push_back(std::move(t));
   }
   for (auto& t : threads) {
     t.join();
   }
-  pool->Wait();
+  for (auto& t : fs) {
+    t.wait();
+  }
   EXPECT_EQ(sum, ((n + 1) * n) / 2);
 }

paddle/fluid/inference/CMakeLists.txt

@@ -31,7 +31,7 @@ if (WITH_GPU AND TENSORRT_FOUND)
 endif()
 
 # Create static library
-cc_library(paddle_fluid DEPS ${fluid_modules} ${STATIC_INFERENCE_APIS} zero_copy_tensor)
+cc_library(paddle_fluid DEPS ${fluid_modules} ${STATIC_INFERENCE_APIS} zero_copy_tensor reset_tensor_array)
 
 if(NOT APPLE)
   # TODO(liuyiqu: Temporarily disable the link flag because it is not support on Mac.
@@ -41,7 +41,7 @@ endif()
 
 # Create shared library
 cc_library(paddle_fluid_shared SHARED SRCS ${SHARED_INFERENCE_SRCS}
-    DEPS ${fluid_modules} paddle_fluid_api)
+    DEPS ${fluid_modules} paddle_fluid_api reset_tensor_array)
 
 set_target_properties(paddle_fluid_shared PROPERTIES OUTPUT_NAME paddle_fluid)
 if(NOT APPLE)

paddle/fluid/inference/analysis/analyzer.cc

@@ -107,6 +107,9 @@ void Analyzer::Run(Argument* argument) {
     passes.push_back("mkldnn_placement_pass");
   }
 #endif
+  // infer_clean_graph_pass should be the first default pass
+  // after mkldnn_placement_pass.
+  passes.push_back("infer_clean_graph_pass");
   for (auto& pass : ir_passes_) {
     if (!disabled_ir_passes_.count(pass)) {
       passes.push_back(pass);

paddle/fluid/inference/analysis/analyzer.h

@@ -67,7 +67,6 @@ class Analyzer : public OrderedRegistry<PassManager> {
   // larger fusion.
   const std::vector<std::string> all_ir_passes_{{
       // Manual update the passes here.
-      "infer_clean_graph_pass",         //
       "attention_lstm_fuse_pass",       //
       "seqconv_eltadd_relu_fuse_pass",  //
       "embedding_fc_lstm_fuse_pass",    //

paddle/fluid/inference/api/CMakeLists.txt

@@ -18,7 +18,8 @@ if(APPLE)
 endif(APPLE)
 
 
-set(inference_deps paddle_inference_api paddle_fluid_api analysis pass ir_pass_manager naive_executor ${GLOB_PASS_LIB})
+set(inference_deps paddle_inference_api paddle_fluid_api analysis pass ir_pass_manager naive_executor ${GLOB_PASS_LIB}
+        )
 
 if(WITH_GPU AND TENSORRT_FOUND)
     set(inference_deps ${inference_deps} paddle_inference_tensorrt_subgraph_engine analysis_predictor)
@@ -31,10 +32,17 @@ function(inference_api_test TARGET_NAME)
         set(multiValueArgs ARGS)
         cmake_parse_arguments(inference_test "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
 
-        cc_test(${TARGET_NAME}
-                SRCS ${inference_test_SRC}
-                DEPS "${inference_deps}"
-                ARGS --dirname=${PYTHON_TESTS_DIR}/book/)
+	if (WITH_GPU)
+		cc_test(${TARGET_NAME}
+			SRCS ${inference_test_SRC}
+			DEPS "${inference_deps}"
+			ARGS --dirname=${PYTHON_TESTS_DIR}/book/ --fraction_of_gpu_memory_to_use=0.15)
+        else()
+		cc_test(${TARGET_NAME}
+			SRCS ${inference_test_SRC}
+			DEPS "${inference_deps}"
+			ARGS --dirname=${PYTHON_TESTS_DIR}/book/)
+	endif()
         if(inference_test_ARGS)
             set_tests_properties(${TARGET_NAME}
                     PROPERTIES DEPENDS "${inference_test_ARGS}")
@@ -42,7 +50,8 @@ function(inference_api_test TARGET_NAME)
     endif(WITH_TESTING)
 endfunction(inference_api_test)
 
-cc_library(paddle_inference_api SRCS api.cc api_impl.cc helper.cc DEPS lod_tensor scope)
+cc_library(reset_tensor_array SRCS details/reset_tensor_array.cc DEPS lod_tensor scope)
+cc_library(paddle_inference_api SRCS api.cc api_impl.cc helper.cc DEPS reset_tensor_array lod_tensor scope)
 cc_library(analysis_predictor SRCS analysis_predictor.cc DEPS paddle_inference_api analysis naive_executor zero_copy_tensor)
 cc_library(zero_copy_tensor SRCS details/zero_copy_tensor.cc DEPS paddle_inference_api)
 cc_library(zero_copy_tensor_dummy SRCS details/zero_copy_tensor_dummy.cc DEPS paddle_inference_api)

paddle/fluid/inference/api/analysis_predictor.cc

@@ -82,6 +82,7 @@ bool AnalysisPredictor::Init(
 
   // Get the feed_target_names and fetch_target_names
   PrepareFeedFetch();
+
   return true;
 }
 
@@ -109,6 +110,10 @@ bool AnalysisPredictor::Run(const std::vector<PaddleTensor> &inputs,
     return false;
   }
   VLOG(3) << "predict cost: " << timer.toc() << "ms";
+
+  // Fix TensorArray reuse not cleaned bug.
+  tensor_array_batch_cleaner_.CollectTensorArrays(scope_.get());
+  tensor_array_batch_cleaner_.ResetTensorArray();
   return true;
 }
 
@@ -322,6 +327,9 @@ std::unique_ptr<ZeroCopyTensor> AnalysisPredictor::GetOutputTensor(
 
 bool AnalysisPredictor::ZeroCopyRun() {
   executor_->Run();
+  // Fix TensorArray reuse not cleaned bug.
+  tensor_array_batch_cleaner_.CollectTensorArrays(scope_.get());
+  tensor_array_batch_cleaner_.ResetTensorArray();
   return true;
 }
 

paddle/fluid/inference/api/analysis_predictor.h

@@ -18,6 +18,7 @@
 #include "paddle/fluid/framework/naive_executor.h"
 #include "paddle/fluid/inference/analysis/analyzer.h"
 #include "paddle/fluid/inference/api/api_impl.h"
+#include "paddle/fluid/inference/api/details/reset_tensor_array.h"
 #include "paddle/fluid/inference/api/paddle_inference_api.h"
 #include "paddle/fluid/string/printf.h"
 
@@ -88,6 +89,7 @@ class AnalysisPredictor : public PaddlePredictor {
   // Memory buffer for feed inputs. The temporary LoDTensor will cause serious
   // concurrency problems, so cache them.
   std::vector<framework::LoDTensor> feed_tensors_;
+  details::TensorArrayBatchCleaner tensor_array_batch_cleaner_;
 };
 
 }  // namespace paddle

paddle/fluid/inference/api/api_impl.cc

@@ -22,6 +22,7 @@ limitations under the License. */
 
 #include "paddle/fluid/framework/feed_fetch_method.h"
 #include "paddle/fluid/inference/api/api_impl.h"
+#include "paddle/fluid/inference/api/details/reset_tensor_array.h"
 #include "paddle/fluid/inference/api/helper.h"
 #include "paddle/fluid/platform/cpu_helper.h"
 #include "paddle/fluid/platform/profiler.h"
@@ -157,6 +158,10 @@ bool NativePaddlePredictor::Run(const std::vector<PaddleTensor> &inputs,
     return false;
   }
   VLOG(3) << "predict cost: " << timer.toc() << "ms";
+
+  // Fix TensorArray reuse not cleaned bug.
+  tensor_array_batch_cleaner_.CollectTensorArrays(scope_.get());
+  tensor_array_batch_cleaner_.ResetTensorArray();
   return true;
 }
 

paddle/fluid/inference/api/api_impl.h

@@ -26,11 +26,11 @@ limitations under the License. */
 #include <string>
 #include <vector>
 
-#include "paddle/fluid/inference/api/paddle_inference_api.h"
-
 #include "paddle/fluid/framework/ddim.h"
 #include "paddle/fluid/framework/lod_tensor.h"
+#include "paddle/fluid/framework/lod_tensor_array.h"
 #include "paddle/fluid/framework/naive_executor.h"
+#include "paddle/fluid/inference/api/details/reset_tensor_array.h"
 #include "paddle/fluid/inference/api/paddle_inference_api.h"
 #include "paddle/fluid/inference/io.h"
 #include "paddle/fluid/platform/init.h"
@@ -77,6 +77,7 @@ class NativePaddlePredictor : public PaddlePredictor {
   std::vector<framework::OpDesc *> fetchs_;
   // Do not use unique_ptr, use parent scope to delete
   framework::Scope *sub_scope_{nullptr};
+  details::TensorArrayBatchCleaner tensor_array_batch_cleaner_;
 };
 
 }  // namespace paddle

paddle/fluid/inference/api/demo_ci/CMakeLists.txt

@@ -52,6 +52,7 @@ include_directories("${PADDLE_LIB}")
 include_directories("${PADDLE_LIB}/third_party/install/protobuf/include")
 include_directories("${PADDLE_LIB}/third_party/install/glog/include")
 include_directories("${PADDLE_LIB}/third_party/install/gflags/include")
+include_directories("${PADDLE_LIB}/third_party/install/xxhash/include")
 if (NOT WIN32)
 include_directories("${PADDLE_LIB}/third_party/install/snappy/include")
 include_directories("${PADDLE_LIB}/third_party/install/snappystream/include")
@@ -61,8 +62,8 @@ endif(NOT WIN32)
 include_directories("${PADDLE_LIB}/third_party/boost")
 include_directories("${PADDLE_LIB}/third_party/eigen3")
 
-if (NOT WIN32) 
-  if (USE_TENSORRT AND WITH_GPU) 
+if (NOT WIN32)
+  if (USE_TENSORRT AND WITH_GPU)
       include_directories("${TENSORRT_INCLUDE_DIR}")
       link_directories("${TENSORRT_LIB_DIR}")
   endif()
@@ -77,13 +78,14 @@ endif(NOT WIN32)
 link_directories("${PADDLE_LIB}/third_party/install/protobuf/lib")
 link_directories("${PADDLE_LIB}/third_party/install/glog/lib")
 link_directories("${PADDLE_LIB}/third_party/install/gflags/lib")
+link_directories("${PADDLE_LIB}/third_party/install/xxhash/lib")
 link_directories("${PADDLE_LIB}/paddle/lib")
 
 add_executable(${DEMO_NAME} ${DEMO_NAME}.cc)
 
 if(WITH_MKL)
   include_directories("${PADDLE_LIB}/third_party/install/mklml/include")
-  set(MATH_LIB ${PADDLE_LIB}/third_party/install/mklml/lib/libmklml_intel${CMAKE_SHARED_LIBRARY_SUFFIX} 
+  set(MATH_LIB ${PADDLE_LIB}/third_party/install/mklml/lib/libmklml_intel${CMAKE_SHARED_LIBRARY_SUFFIX}
                ${PADDLE_LIB}/third_party/install/mklml/lib/libiomp5${CMAKE_SHARED_LIBRARY_SUFFIX})
   set(MKLDNN_PATH "${PADDLE_LIB}/third_party/install/mkldnn")
   if(EXISTS ${MKLDNN_PATH})
@@ -107,7 +109,7 @@ if (NOT WIN32)
 set(EXTERNAL_LIB "-lrt -ldl -lpthread")
 set(DEPS ${DEPS}
     ${MATH_LIB} ${MKLDNN_LIB}
-    glog gflags protobuf snappystream snappy z
+    glog gflags protobuf snappystream snappy z xxhash
     ${EXTERNAL_LIB})
 else()
 set(DEPS ${DEPS}
@@ -120,7 +122,7 @@ endif(NOT WIN32)
 
 if(WITH_GPU)
   if(NOT WIN32)
-    if (USE_TENSORRT) 
+    if (USE_TENSORRT)
       set(DEPS ${DEPS} ${TENSORRT_LIB_DIR}/libnvinfer${CMAKE_STATIC_LIBRARY_SUFFIX})
       set(DEPS ${DEPS} ${TENSORRT_LIB_DIR}/libnvinfer_plugin${CMAKE_STATIC_LIBRARY_SUFFIX})
     endif()

paddle/fluid/inference/api/demo_ci/run.sh

@@ -16,7 +16,7 @@ if [ $2 == ON ]; then
 fi
 if [ $3 == ON ]; then
   use_gpu_list='true false'
-else    
+else
   use_gpu_list='false'
 fi
 
@@ -60,7 +60,8 @@ for WITH_STATIC_LIB in ON OFF; do
     -DWITH_MKL=$TURN_ON_MKL \
     -DDEMO_NAME=simple_on_word2vec \
     -DWITH_GPU=$TEST_GPU_CPU \
-    -DWITH_STATIC_LIB=$WITH_STATIC_LIB
+    -DWITH_STATIC_LIB=$WITH_STATIC_LIB \
+    -DON_INFER=ON
   make -j
   word2vec_model=${PADDLE_ROOT}'/build/python/paddle/fluid/tests/book/word2vec.inference.model'
   if [ -d $word2vec_model ]; then
@@ -80,10 +81,11 @@ for WITH_STATIC_LIB in ON OFF; do
     -DWITH_MKL=$TURN_ON_MKL \
     -DDEMO_NAME=vis_demo \
     -DWITH_GPU=$TEST_GPU_CPU \
-    -DWITH_STATIC_LIB=$WITH_STATIC_LIB
+    -DWITH_STATIC_LIB=$WITH_STATIC_LIB \
+    -DON_INFER=ON
   make -j
   for use_gpu in $use_gpu_list; do
-    for vis_demo_name in $vis_demo_list; do 
+    for vis_demo_name in $vis_demo_list; do
       ./vis_demo \
         --modeldir=$DATA_DIR/$vis_demo_name/model \
         --data=$DATA_DIR/$vis_demo_name/data.txt \
@@ -95,7 +97,7 @@ for WITH_STATIC_LIB in ON OFF; do
       fi
     done
   done
-  
+
   # --------tensorrt mobilenet------
   if [ $USE_TENSORRT == ON -a $TEST_GPU_CPU == ON ]; then
     rm -rf *
@@ -106,8 +108,9 @@ for WITH_STATIC_LIB in ON OFF; do
       -DWITH_STATIC_LIB=$WITH_STATIC_LIB \
       -DUSE_TENSORRT=$USE_TENSORRT \
       -DTENSORRT_INCLUDE_DIR=$TENSORRT_INCLUDE_DIR \
-      -DTENSORRT_LIB_DIR=$TENSORRT_LIB_DIR
-    make -j 
+      -DTENSORRT_LIB_DIR=$TENSORRT_LIB_DIR \
+      -DON_INFER=ON
+    make -j
     ./trt_mobilenet_demo \
       --modeldir=$DATA_DIR/mobilenet/model \
       --data=$DATA_DIR/mobilenet/data.txt \

paddle/fluid/inference/api/details/reset_tensor_array.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/inference/api/details/reset_tensor_array.h"
+
+namespace paddle {
+namespace details {
+
+// Should be called after the parameters are loaded.
+void TensorArrayBatchCleaner::CollectTensorArrays(framework::Scope *scope) {
+  if (flag_) {
+    for (auto &var_name : scope->LocalVarNames()) {
+      auto *var = scope->FindVar(var_name);
+      // TODO(Superjomn) should avoid the case when a TensorArray is a
+      // parameter.
+      if (var_name == "feed" || var_name == "fetch") continue;
+      if (var->Type() == typeid(framework::LoDTensorArray)) {
+        VLOG(4) << "collect " << var_name;
+        arrays_.push_back(var->GetMutable<framework::LoDTensorArray>());
+      }
+    }
+    for (auto *kid : scope->kids()) {
+      CollectTensorArrays(kid);
+    }
+
+    VLOG(3) << "Collect " << arrays_.size() << " arrays";
+    flag_ = false;
+  }
+}
+
+// Should be called when `Run` finished.
+void TensorArrayBatchCleaner::ResetTensorArray() {
+  for (auto *arr : arrays_) {
+    arr->clear();
+  }
+}
+
+}  // namespace details
+}  // namespace paddle

paddle/fluid/inference/api/details/reset_tensor_array.h

+// 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.
+
+#pragma once
+
+#include <vector>
+#include "paddle/fluid/framework/lod_tensor_array.h"
+#include "paddle/fluid/framework/scope.h"
+
+namespace paddle {
+namespace details {
+
+// Clean the TensorArray each batch to make the behavior the same with the
+// training phase.
+struct TensorArrayBatchCleaner {
+  // Fix the tensor array not clear in the inference scenarios.
+  void CollectTensorArrays(framework::Scope *scope);
+  void ResetTensorArray();
+
+ private:
+  bool flag_{true};
+  std::vector<framework::LoDTensorArray *> arrays_;
+};
+
+}  // namespace details
+}  // namespace paddle

paddle/fluid/inference/api/paddle_inference_api.h

@@ -124,7 +124,7 @@ class ZeroCopyTensor {
   std::vector<std::vector<size_t>> lod() const;
 
  protected:
-  ZeroCopyTensor(void* scope) : scope_{scope} {}
+  explicit ZeroCopyTensor(void* scope) : scope_{scope} {}
   void SetName(const std::string& name) { name_ = name; }
   void* FindTensor() const;
 
@@ -259,12 +259,6 @@ struct AnalysisConfig : public NativeConfig {
     kExclude   // Specify the disabled passes in `ir_passes`.
   };
 
-  void SetIncludeMode() {
-    ir_mode = IrPassMode::kInclude;
-    // this pass has to be run at the beginning of all fuse passes
-    ir_passes = {"infer_clean_graph_pass"};
-  }
-
   // Determine whether to perform graph optimization.
   bool enable_ir_optim = true;
   // Manually determine the IR passes to run.

paddle/fluid/inference/tests/api/analyzer_rnn1_tester.cc

@@ -228,6 +228,7 @@ void SetInput(std::vector<std::vector<PaddleTensor>> *inputs) {
 TEST(Analyzer_rnn1, profile) {
   contrib::AnalysisConfig cfg;
   SetConfig(&cfg);
+  cfg.use_gpu = false;
   std::vector<PaddleTensor> outputs;
 
   std::vector<std::vector<PaddleTensor>> input_slots_all;

paddle/fluid/operators/CMakeLists.txt

@@ -268,6 +268,7 @@ if (WITH_GPU AND TENSORRT_FOUND)
 else()
     set(DEPS_OPS ${DEPS_OPS} tensorrt_engine_op)
 endif()
+op_library(hash_op DEPS xxhash)
 op_library(clip_by_norm_op DEPS selected_rows_functor selected_rows)
 op_library(sum_op DEPS selected_rows_functor)
 op_library(sgd_op DEPS selected_rows_functor)

paddle/fluid/operators/beam_search_decode_op.cc

@@ -79,6 +79,9 @@ struct BeamSearchDecodeFunctor {
   bool tensor_on_gpu_;
   size_t beam_size_;
   int end_id_;
+  // TODO(Superjomn) Here might result serious performance issue in the
+  // concurrency
+  // scenarios.
   const LoDTensorArray& step_ids_origin_;
   const LoDTensorArray& step_scores_origin_;
   LoDTensorArray step_ids_ = LoDTensorArray();

paddle/fluid/operators/detection/generate_proposals_op.cc

@@ -284,7 +284,7 @@ static inline Tensor NMS(const platform::DeviceContext &ctx, Tensor *bbox,
       selected_indices.push_back(idx);
       ++selected_num;
     }
-    sorted_indices.erase(sorted_indices.end());
+    sorted_indices.erase(sorted_indices.end() - 1);
     if (flag && eta < 1 && adaptive_threshold > 0.5) {
       adaptive_threshold *= eta;
     }

paddle/fluid/operators/dropout_op.cc

@@ -13,6 +13,7 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/operators/dropout_op.h"
+#include <string>
 
 namespace paddle {
 namespace operators {
@@ -57,6 +58,29 @@ class DropoutOpMaker : public framework::OpProtoAndCheckerMaker {
                   "will be dropped.")
         .SetDefault(false);
     AddAttr<int>("seed", "Dropout random seed.").SetDefault(0);
+    AddAttr<std::string>(
+        "dropout_implementation",
+        "[\"downgrade_in_infer\"|\"upscale_in_train\"]"
+        "There are two kinds of ways to implement dropout"
+        "(the mask below is a tensor have the same shape with input"
+        "the value of mask is 0 or 1, the ratio of 0 is dropout_prob)"
+        "1. downgrade_in_infer(default), downgrade the outcome at inference "
+        "time"
+        "   train: out = input * mask"
+        "   inference: out = input * dropout_prob"
+        "2. upscale_in_train, upscale the outcome at training time, do nothing "
+        "in inference"
+        "   train: out = input * mask / ( 1.0 - dropout_prob )"
+        "   inference: out = input"
+        "   dropout op can be removed from the program. the program will be "
+        "efficient")
+        .SetDefault("downgrade_in_infer")
+        .AddCustomChecker([](const std::string& type) {
+          PADDLE_ENFORCE(
+              type == "downgrade_in_infer" || type == "upscale_in_train",
+              "dropout_implementation can only be downgrade_in_infer or "
+              "upscale_in_train");
+        });
 
     AddComment(R"DOC(
 Dropout Operator.
@@ -104,7 +128,9 @@ REGISTER_OPERATOR(dropout, ops::DropoutOp, ops::DropoutOpMaker,
                   paddle::framework::DefaultGradOpDescMaker<true>);
 REGISTER_OPERATOR(dropout_grad, ops::DropoutOpGrad);
 REGISTER_OP_CPU_KERNEL(
-    dropout, ops::CPUDropoutKernel<paddle::platform::CPUDeviceContext, float>);
+    dropout, ops::CPUDropoutKernel<paddle::platform::CPUDeviceContext, float>,
+    ops::CPUDropoutKernel<paddle::platform::CPUDeviceContext, double>);
 REGISTER_OP_CPU_KERNEL(
     dropout_grad,
-    ops::DropoutGradKernel<paddle::platform::CPUDeviceContext, float>);
+    ops::DropoutGradKernel<paddle::platform::CPUDeviceContext, float>,
+    ops::DropoutGradKernel<paddle::platform::CPUDeviceContext, double>);

paddle/fluid/operators/dropout_op.cu

@@ -17,6 +17,7 @@ limitations under the License. */
 #include <thrust/iterator/counting_iterator.h>
 #include <thrust/random.h>
 #include <thrust/transform.h>
+#include <string>
 #include "paddle/fluid/operators/dropout_op.h"
 #include "paddle/fluid/platform/float16.h"
 
@@ -26,7 +27,8 @@ namespace operators {
 template <typename T>
 __global__ void RandomGenerator(const size_t n, const int seed,
                                 const float dropout_prob, const T* src,
-                                T* mask_data, T* dst) {
+                                T* mask_data, T* dst,
+                                bool is_upscale_in_train) {
   thrust::minstd_rand rng;
   rng.seed(seed);
   thrust::uniform_real_distribution<float> dist(0, 1);
@@ -47,7 +49,11 @@ __global__ void RandomGenerator(const size_t n, const int seed,
     if (dist(rng) < dropout_prob) {
       mask = static_cast<T>(0);
     } else {
-      mask = static_cast<T>(1);
+      if (is_upscale_in_train) {
+        mask = static_cast<T>(1.0f / (1.0f - dropout_prob));
+      } else {
+        mask = static_cast<T>(1);
+      }
     }
     dest = s * mask;
     mask_data[idx] = mask;
@@ -67,6 +73,8 @@ class GPUDropoutKernel : public framework::OpKernel<T> {
     y->mutable_data<T>(context.GetPlace());
     float dropout_prob = context.Attr<float>("dropout_prob");
 
+    auto dropout_implementation =
+        context.Attr<std::string>("dropout_implementation");
     auto& place = *context.template device_context<Place>().eigen_device();
     if (!context.Attr<bool>("is_test")) {
       auto* mask = context.Output<Tensor>("Mask");
@@ -83,11 +91,16 @@ class GPUDropoutKernel : public framework::OpKernel<T> {
       int grid = (x->numel() + threads - 1) / threads;
       RandomGenerator<
           T><<<grid, threads, 0, context.cuda_device_context().stream()>>>(
-          size, seed, dropout_prob, x_data, mask_data, y_data);
+          size, seed, dropout_prob, x_data, mask_data, y_data,
+          (dropout_implementation == "upscale_in_train"));
     } else {
       auto X = EigenMatrix<T>::Reshape(*x, 1);
       auto Y = EigenMatrix<T>::Reshape(*y, 1);
-      Y.device(place) = X * static_cast<T>(1.0f - dropout_prob);
+      if (dropout_implementation == "upscale_in_train") {
+        Y.device(place) = X;
+      } else {
+        Y.device(place) = X * static_cast<T>(1.0f - dropout_prob);
+      }
     }
   }
 };
@@ -99,6 +112,8 @@ namespace ops = paddle::operators;
 namespace plat = paddle::platform;
 REGISTER_OP_CUDA_KERNEL(
     dropout, ops::GPUDropoutKernel<plat::CUDADeviceContext, float>,
-    ops::GPUDropoutKernel<plat::CUDADeviceContext, plat::float16>);
-REGISTER_OP_CUDA_KERNEL(dropout_grad,
-                        ops::DropoutGradKernel<plat::CUDADeviceContext, float>);
+    ops::GPUDropoutKernel<plat::CUDADeviceContext, plat::float16>,
+    ops::GPUDropoutKernel<plat::CUDADeviceContext, double>);
+REGISTER_OP_CUDA_KERNEL(
+    dropout_grad, ops::DropoutGradKernel<plat::CUDADeviceContext, float>,
+    ops::DropoutGradKernel<plat::CUDADeviceContext, double>);

paddle/fluid/operators/dropout_op.h

@@ -14,6 +14,7 @@ limitations under the License. */
 #pragma once
 
 #include <random>
+#include <string>
 
 #include "paddle/fluid/framework/eigen.h"
 #include "paddle/fluid/framework/op_registry.h"
@@ -36,6 +37,8 @@ class CPUDropoutKernel : public framework::OpKernel<T> {
     auto* y_data = y->mutable_data<T>(context.GetPlace());
     float dropout_prob = context.Attr<float>("dropout_prob");
 
+    auto dropout_implementation =
+        context.Attr<std::string>("dropout_implementation");
     if (!context.Attr<bool>("is_test")) {
       auto* mask = context.Output<Tensor>("Mask");
       auto* mask_data = mask->mutable_data<T>(context.GetPlace());
@@ -49,14 +52,20 @@ class CPUDropoutKernel : public framework::OpKernel<T> {
       engine.seed(seed);
 
       std::uniform_real_distribution<float> dist(0, 1);
+
       size_t size = framework::product(mask->dims());
       for (size_t i = 0; i < size; ++i) {
         if (dist(engine) < dropout_prob) {
           mask_data[i] = 0;
           y_data[i] = 0;
         } else {
-          mask_data[i] = 1;
-          y_data[i] = x_data[i];
+          if (dropout_implementation == "upscale_in_train") {
+            mask_data[i] = 1.0f / static_cast<T>(1.0f - dropout_prob);
+            y_data[i] = x_data[i] / static_cast<T>(1.0f - dropout_prob);
+          } else {
+            mask_data[i] = 1;
+            y_data[i] = x_data[i];
+          }
         }
       }
     } else {
@@ -64,7 +73,11 @@ class CPUDropoutKernel : public framework::OpKernel<T> {
       auto Y = EigenMatrix<T>::Reshape(*y, 1);
       auto& place =
           *context.template device_context<DeviceContext>().eigen_device();
-      Y.device(place) = X * (1.0f - dropout_prob);
+      if (dropout_implementation == "upscale_in_train") {
+        Y.device(place) = X;
+      } else {
+        Y.device(place) = X * static_cast<T>(1.0f - dropout_prob);
+      }
     }
   }
 };

paddle/fluid/operators/hash_op.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "paddle/fluid/operators/hash_op.h"
+#include <string>
+#include <vector>
+
+namespace paddle {
+namespace operators {
+
+class HashOp : public framework::OperatorWithKernel {
+ public:
+  HashOp(const std::string &type, const framework::VariableNameMap &inputs,
+         const framework::VariableNameMap &outputs,
+         const framework::AttributeMap &attrs)
+      : OperatorWithKernel(type, inputs, outputs, attrs) {}
+
+  void InferShape(framework::InferShapeContext *ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("X"),
+                   "Input(X) of HashOp should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("Out"),
+                   "Output(Out) of HashOp should not be null.");
+
+    auto dims = ctx->GetInputDim("X");
+    PADDLE_ENFORCE_EQ(dims.size(), 2UL,
+                      "The input of hash_op's dimensions must be 2");
+    std::vector<int64_t> out_dims;
+    out_dims.reserve(dims.size() + 1);
+    // copy all dims except the last one
+    for (size_t i = 0u; i != dims.size() - 1; ++i) {
+      out_dims.emplace_back(dims[i]);
+    }
+    int num_hash = ctx->Attrs().Get<int>("num_hash");
+    out_dims.emplace_back(num_hash);
+    // keep the last dim to 1
+    out_dims.emplace_back(1);
+
+    ctx->SetOutputDim("Out", framework::make_ddim(out_dims));
+    ctx->ShareLoD("X", /*->*/ "Out");
+  }
+};
+
+class HashOpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  void Make() override {
+    AddInput("X", "(Tensor) Input tensor of scale operator.");
+    AddOutput("Out", "(Tensor) Output tensor of scale operator.");
+    AddComment(R"DOC(
+**Hash Operator**
+$$Out = scale * X$$
+)DOC");
+    AddAttr<int>("num_hash", "").SetDefault(1);
+    AddAttr<int>("mod_by", "").SetDefault(100000);
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+
+REGISTER_OP_WITHOUT_GRADIENT(hash, ops::HashOp, ops::HashOpMaker);
+REGISTER_OP_CPU_KERNEL(hash, ops::HashKerel<int>, ops::HashKerel<int64_t>);

paddle/fluid/operators/hash_op.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
+
+extern "C" {
+#include <xxhash.h>
+}
+#include "paddle/fluid/framework/eigen.h"
+#include "paddle/fluid/framework/op_registry.h"
+
+namespace paddle {
+namespace operators {
+// template <typename DeviceContext, typename T>
+template <typename T>
+class HashKerel : public framework::OpKernel<T> {
+ public:
+  virtual void Compute(const framework::ExecutionContext& context) const {
+    auto* out_t = context.Output<framework::LoDTensor>("Out");
+    auto* in_t = context.Input<framework::LoDTensor>("X");
+    int mod_by = context.Attr<int>("mod_by");
+    int num_hash = context.Attr<int>("num_hash");
+    auto* output = out_t->mutable_data<T>(context.GetPlace());
+
+    auto in_dims = in_t->dims();
+    auto in_lod = in_t->lod();
+    PADDLE_ENFORCE_EQ(
+        static_cast<uint64_t>(in_dims[0]), in_lod[0].back(),
+        "The actual input data's size mismatched with LoD information.");
+
+    auto seq_length = in_dims[0];
+    auto last_dim = in_dims[in_dims.size() - 1];
+    auto* input = in_t->data<T>();
+    for (int idx = 0; idx < seq_length; ++idx) {
+      for (int ihash = 0; ihash != num_hash; ++ihash) {
+        output[idx * num_hash + ihash] =
+            XXH64(input, sizeof(int) * last_dim, ihash) % mod_by;
+      }
+      input += last_dim;
+    }
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle

paddle/fluid/operators/lookup_table_op.cc

@@ -81,6 +81,12 @@ class LookupTableOpMaker : public framework::OpProtoAndCheckerMaker {
                      "Otherwise the given value indicates padding the output "
                      "with zeros whenever lookup encounters it in Ids.")
         .SetDefault(kNoPadding);
+    // NOTE(minqiyang): grad_inplace is an temporal attribute,
+    // please do NOT set this attribute in python layer.
+    AddAttr<bool>("grad_inplace",
+                  "(boolean, default false) "
+                  "If the grad op reuse the input's variable.")
+        .SetDefault(false);
     AddComment(R"DOC(
 Lookup Table Operator.
 

paddle/fluid/operators/lookup_table_op.h

@@ -21,6 +21,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/framework/selected_rows.h"
+#include "paddle/fluid/operators/math/blas.h"
 
 namespace paddle {
 namespace operators {
@@ -68,6 +69,7 @@ class LookupTableKernel : public framework::OpKernel<T> {
       const auto *table = table_t.value().data<T>();
       auto *output = output_t->mutable_data<T>(context.GetPlace());
 
+      auto blas = math::GetBlas<platform::CPUDeviceContext, T>(context);
       for (int64_t i = 0; i < ids_numel; ++i) {
         if (padding_idx != kNoPadding && ids[i] == padding_idx) {
           memset(output + i * row_width, 0, row_width * sizeof(T));
@@ -75,8 +77,8 @@ class LookupTableKernel : public framework::OpKernel<T> {
           PADDLE_ENFORCE_GE(ids[i], 0);
           auto id_index = table_t.Index(ids[i]);
           PADDLE_ENFORCE_GE(id_index, 0, "the input key should be exists.");
-          memcpy(output + i * row_width, table + id_index * row_width,
-                 row_width * sizeof(T));
+          blas.VCOPY(row_width, table + id_index * row_width,
+                     output + i * row_width);
         }
       }
     }
@@ -111,27 +113,37 @@ class LookupTableGradKernel : public framework::OpKernel<T> {
       auto *ids_data = ids->data<int64_t>();
       int64_t ids_num = ids->numel();
 
-      framework::Vector<int64_t> new_rows;
-      new_rows.reserve(ids_num);
-      for (int64_t i = 0; i < ids_num; i++) {
-        new_rows.push_back(ids_data[i]);
-      }
+      std::vector<int64_t> new_rows;
+      new_rows.resize(ids_num);
+      std::memcpy(&new_rows[0], ids_data, ids_num * sizeof(int64_t));
       d_table->set_rows(new_rows);
 
       auto *d_table_value = d_table->mutable_value();
       d_table_value->Resize({ids_num, table_dim[1]});
-      d_table_value->mutable_data<T>(context.GetPlace());
-
-      d_table->set_height(table_dim[0]);
-
-      auto *d_output_data = d_output->data<T>();
-      auto *d_table_data = d_table_value->data<T>();
-
-      auto d_output_dims = d_output->dims();
-      PADDLE_ENFORCE_EQ(
-          d_table_value->dims(),
-          framework::flatten_to_2d(d_output_dims, d_output_dims.size() - 1));
-      memcpy(d_table_data, d_output_data, sizeof(T) * d_output->numel());
+      // FIXME(minqiyang):
+      // memory optimization will NOT reuse Tensor with SelectedRows
+      // so we could just share the tensor here directly.
+      // However, the InferVarType method will infer the output SelectedRows
+      // to Tensor sometimes, which is a bug, so we will add an attribute
+      // here to indicate the inplace and remove this attribute after
+      // the InferVarType's bug was fixed
+      bool grad_inplace = context.Attr<bool>("grad_inplace");
+      if (grad_inplace) {
+        d_table_value->ShareDataWith(*d_output);
+      } else {
+        d_table_value->mutable_data<T>(context.GetPlace());
+
+        d_table->set_height(table_dim[0]);
+
+        auto *d_output_data = d_output->data<T>();
+        auto *d_table_data = d_table_value->data<T>();
+
+        auto d_output_dims = d_output->dims();
+        PADDLE_ENFORCE_EQ(
+            d_table_value->dims(),
+            framework::flatten_to_2d(d_output_dims, d_output_dims.size() - 1));
+        memcpy(d_table_data, d_output_data, sizeof(T) * d_output->numel());
+      }
     } else {
       auto *ids = context.Input<LoDTensor>("Ids");
       auto *d_output = context.Input<LoDTensor>(framework::GradVarName("Out"));

paddle/fluid/operators/math/algorithm.h

@@ -39,6 +39,52 @@ HOSTDEVICE inline int64_t BinarySearch(const T *x, int64_t num, const T &val) {
   return -1;
 }
 
+template <typename T>
+HOSTDEVICE inline size_t LowerBound(const T *x, size_t num, const T &val) {
+#ifdef __CUDA_ARCH__
+  // The following code is from
+  // https://en.cppreference.com/w/cpp/algorithm/lower_bound
+  auto *first = x;
+  int64_t count = static_cast<int64_t>(num);
+  while (count > 0) {
+    int64_t step = (count >> 1);
+    auto *it = first + step;
+    if (*it < val) {
+      first = ++it;
+      count -= (step + 1);
+    } else {
+      count = step;
+    }
+  }
+  return static_cast<size_t>(first - x);
+#else
+  return static_cast<size_t>(std::lower_bound(x, x + num, val) - x);
+#endif
+}
+
+template <typename T>
+HOSTDEVICE inline size_t UpperBound(const T *x, size_t num, const T &val) {
+#ifdef __CUDA_ARCH__
+  // The following code is from
+  // https://en.cppreference.com/w/cpp/algorithm/upper_bound
+  auto *first = x;
+  int64_t count = static_cast<int64_t>(num);
+  while (count > 0) {
+    auto step = (count >> 1);
+    auto *it = first + step;
+    if (val < *it) {
+      count = step;
+    } else {
+      first = ++it;
+      count -= (step + 1);
+    }
+  }
+  return static_cast<size_t>(first - x);
+#else
+  return static_cast<size_t>(std::upper_bound(x, x + num, val) - x);
+#endif
+}
+
 }  // namespace math
 }  // namespace operators
 }  // namespace paddle

paddle/fluid/operators/sequence_reverse_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/sequence_reverse_op.h"
+
+namespace ops = paddle::operators;
+
+REGISTER_OPERATOR(sequence_reverse, ops::SequenceReverseOp,
+                  ops::SequenceReverseOpMaker,
+                  ops::SequenceReverseGradOpDescMaker);
+
+REGISTER_OP_CPU_KERNEL(
+    sequence_reverse,
+    ops::SequenceReverseOpKernel<paddle::platform::CPUDeviceContext, uint8_t>,
+    ops::SequenceReverseOpKernel<paddle::platform::CPUDeviceContext, int>,
+    ops::SequenceReverseOpKernel<paddle::platform::CPUDeviceContext, int64_t>,
+    ops::SequenceReverseOpKernel<paddle::platform::CPUDeviceContext, float>,
+    ops::SequenceReverseOpKernel<paddle::platform::CPUDeviceContext, double>);

paddle/fluid/operators/sequence_reverse_op.cu

+// 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/sequence_reverse_op.h"
+
+namespace ops = paddle::operators;
+
+REGISTER_OP_CUDA_KERNEL(
+    sequence_reverse,
+    ops::SequenceReverseOpKernel<paddle::platform::CUDADeviceContext, uint8_t>,
+    ops::SequenceReverseOpKernel<paddle::platform::CUDADeviceContext, int>,
+    ops::SequenceReverseOpKernel<paddle::platform::CUDADeviceContext, int64_t>,
+    ops::SequenceReverseOpKernel<paddle::platform::CUDADeviceContext, float>,
+    ops::SequenceReverseOpKernel<paddle::platform::CUDADeviceContext, double>);

paddle/fluid/operators/sequence_reverse_op.h

+// 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.
+
+#pragma once
+
+#include "paddle/fluid/framework/op_registry.h"
+#include "paddle/fluid/operators/math/algorithm.h"
+#include "paddle/fluid/platform/for_range.h"
+
+namespace paddle {
+namespace operators {
+
+class SequenceReverseOp : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+  void InferShape(framework::InferShapeContext *ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("X"), "Input(X) must exist");
+    PADDLE_ENFORCE(ctx->HasOutput("Y"), "Output(Y) must exist");
+
+    auto x_dim = ctx->GetInputDim("X");
+    PADDLE_ENFORCE_GE(x_dim.size(), 2,
+                      "Rank of Input(X) must be not less than 2.");
+
+    ctx->SetOutputDim("Y", x_dim);
+    ctx->ShareLoD("X", "Y");
+  }
+};
+
+class SequenceReverseOpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  void Make() override {
+    AddInput("X", "The input LoDTensor of sequence_reverse op.");
+    AddOutput("Y", "The output LoDTensor of sequence_reverse op.");
+    AddComment(R"DOC(
+SequenceReverse Operator.
+
+Reverse each sequence in input X along dim 0.
+
+Assuming X is a LoDTensor with dims [5, 4] and lod [[0, 2, 5]], where:
+
+X.data() = [
+  [1, 2, 3, 4],
+  [5, 6, 7, 8], # the 0-th sequence with length 2
+  [9, 10, 11, 12],
+  [13, 14, 15, 16],
+  [17, 18, 19, 20] # the 1-st sequence with length 3
+]
+
+The output Y would be a LoDTensor sharing the same dims and lod with input X,
+and:
+
+Y.data() = [
+  [5, 6, 7, 8],
+  [1, 2, 3, 4], # the reversed 0-th sequence with length 2
+  [17, 18, 19, 20],
+  [13, 14, 15, 16],
+  [9, 10, 11, 12] # the reversed 1-st sequence with length 3
+]
+
+This Operator is useful to build a reverse dynamic RNN network.
+
+This Operator only supports one-level lod currently.
+    )DOC");
+  }
+};
+
+template <typename T>
+struct SequenceReverseFunctor {
+  SequenceReverseFunctor(const T *x, T *y, const size_t *lod, size_t lod_count,
+                         size_t row_numel)
+      : x_(x), y_(y), lod_(lod), lod_count_(lod_count), row_numel_(row_numel) {}
+
+  HOSTDEVICE void operator()(size_t idx_x) const {
+    auto row_idx_x = idx_x / row_numel_;
+    auto lod_idx = math::UpperBound(lod_, lod_count_, row_idx_x);
+    auto row_idx_y = lod_[lod_idx - 1] + (lod_[lod_idx] - 1 - row_idx_x);
+    auto idx_y = row_idx_y * row_numel_ + idx_x % row_numel_;
+    y_[idx_y] = x_[idx_x];
+  }
+
+  const T *x_;
+  T *y_;
+  const size_t *lod_;
+  size_t lod_count_;
+  size_t row_numel_;
+};
+
+template <typename DeviceContext, typename T>
+class SequenceReverseOpKernel : public framework::OpKernel<T> {
+  using LoDTensor = framework::LoDTensor;
+
+ public:
+  void Compute(const framework::ExecutionContext &ctx) const override {
+    auto &x = *ctx.Input<LoDTensor>("X");
+    auto *y = ctx.Output<LoDTensor>("Y");
+
+    PADDLE_ENFORCE_EQ(x.lod().size(), 1,
+                      "SequenceReverse Op only support one level lod.");
+
+    auto &dev_ctx = ctx.template device_context<DeviceContext>();
+    const size_t *lod;
+    size_t lod_count = x.lod()[0].size();
+
+#ifdef PADDLE_WITH_CUDA
+    if (platform::is_gpu_place(ctx.GetPlace())) {
+      lod = x.lod()[0].CUDAData(ctx.GetPlace());
+    } else {
+#endif
+      lod = x.lod()[0].data();
+#ifdef PADDLE_WITH_CUDA
+    }
+#endif
+
+    size_t limit = static_cast<size_t>(x.numel());
+    size_t row_numel = static_cast<size_t>(limit / x.dims()[0]);
+    auto *x_data = x.data<T>();
+    auto *y_data = y->mutable_data<T>(ctx.GetPlace());
+
+    PADDLE_ENFORCE_NE(x_data, y_data,
+                      "SequenceReverse Op does not support in-place operation");
+
+    SequenceReverseFunctor<T> functor(x_data, y_data, lod, lod_count,
+                                      row_numel);
+    platform::ForRange<DeviceContext> for_range(dev_ctx, limit);
+    for_range(functor);
+  }
+};
+
+class SequenceReverseGradOpDescMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+ protected:
+  std::unique_ptr<framework::OpDesc> Apply() const override {
+    std::unique_ptr<framework::OpDesc> op(new framework::OpDesc());
+    op->SetType("sequence_reverse");
+    op->SetInput("X", OutputGrad("Y"));
+    op->SetOutput("Y", InputGrad("X"));
+    op->SetAttrMap(Attrs());
+    return op;
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle

paddle/fluid/operators/softmax_cudnn_op.cu.cc

@@ -76,6 +76,8 @@ namespace ops = paddle::operators;
 namespace plat = paddle::platform;
 REGISTER_OP_KERNEL(softmax, CUDNN, plat::CUDAPlace,
                    ops::SoftmaxCUDNNKernel<float>,
+                   ops::SoftmaxCUDNNKernel<double>,
                    ops::SoftmaxCUDNNKernel<plat::float16>);
 REGISTER_OP_KERNEL(softmax_grad, CUDNN, plat::CUDAPlace,
-                   ops::SoftmaxGradCUDNNKernel<float>);
+                   ops::SoftmaxGradCUDNNKernel<float>,
+                   ops::SoftmaxGradCUDNNKernel<double>);

paddle/fluid/operators/transpose_op.cc

@@ -210,18 +210,21 @@ REGISTER_OPERATOR(transpose, ops::TransposeOp, ops::TransposeOpMaker,
 REGISTER_OPERATOR(transpose_grad, ops::TransposeOpGrad);
 
 REGISTER_OP_CPU_KERNEL(
-    transpose, ops::TransposeKernel<paddle::platform::CPUDeviceContext, float>);
+    transpose, ops::TransposeKernel<paddle::platform::CPUDeviceContext, float>,
+    ops::TransposeKernel<paddle::platform::CPUDeviceContext, double>);
 REGISTER_OP_CPU_KERNEL(
     transpose_grad,
-    ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, float>);
+    ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, float>,
+    ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, double>);
 
 REGISTER_OPERATOR(transpose2, ops::Transpose2Op, ops::Transpose2OpMaker,
                   ops::Transpose2GradMaker);
 REGISTER_OPERATOR(transpose2_grad, ops::Transpose2OpGrad);
 
 REGISTER_OP_CPU_KERNEL(
-    transpose2,
-    ops::TransposeKernel<paddle::platform::CPUDeviceContext, float>);
+    transpose2, ops::TransposeKernel<paddle::platform::CPUDeviceContext, float>,
+    ops::TransposeKernel<paddle::platform::CPUDeviceContext, double>);
 REGISTER_OP_CPU_KERNEL(
     transpose2_grad,
-    ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, float>);
+    ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, float>,
+    ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, double>);

paddle/fluid/operators/transpose_op.cu.cc

@@ -16,15 +16,18 @@ limitations under the License. */
 
 namespace ops = paddle::operators;
 REGISTER_OP_CUDA_KERNEL(
-    transpose,
-    ops::TransposeKernel<paddle::platform::CUDADeviceContext, float>);
+    transpose, ops::TransposeKernel<paddle::platform::CUDADeviceContext, float>,
+    ops::TransposeKernel<paddle::platform::CUDADeviceContext, double>);
 REGISTER_OP_CUDA_KERNEL(
     transpose_grad,
-    ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, float>);
+    ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, float>,
+    ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, double>);
 
 REGISTER_OP_CUDA_KERNEL(
     transpose2,
-    ops::TransposeKernel<paddle::platform::CUDADeviceContext, float>);
+    ops::TransposeKernel<paddle::platform::CUDADeviceContext, float>,
+    ops::TransposeKernel<paddle::platform::CUDADeviceContext, double>);
 REGISTER_OP_CUDA_KERNEL(
     transpose2_grad,
-    ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, float>);
+    ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, float>,
+    ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, double>);

paddle/fluid/train/demo/CMakeLists.txt

@@ -15,6 +15,7 @@ include_directories("${PADDLE_LIB}")
 include_directories("${PADDLE_LIB}/third_party/install/protobuf/include")
 include_directories("${PADDLE_LIB}/third_party/install/glog/include")
 include_directories("${PADDLE_LIB}/third_party/install/gflags/include")
+include_directories("${PADDLE_LIB}/third_party/install/xxhash/include")
 include_directories("${PADDLE_LIB}/third_party/install/snappy/include")
 include_directories("${PADDLE_LIB}/third_party/install/snappystream/include")
 include_directories("${PADDLE_LIB}/third_party/install/zlib/include")
@@ -27,6 +28,7 @@ link_directories("${PADDLE_LIB}/third_party/install/snappystream/lib")
 link_directories("${PADDLE_LIB}/third_party/install/protobuf/lib")
 link_directories("${PADDLE_LIB}/third_party/install/glog/lib")
 link_directories("${PADDLE_LIB}/third_party/install/gflags/lib")
+link_directories("${PADDLE_LIB}/third_party/install/xxhash/lib")
 link_directories("${PADDLE_LIB}/third_party/install/zlib/lib")
 
 add_executable(demo_trainer demo_trainer.cc)
@@ -62,5 +64,5 @@ target_link_libraries(demo_trainer
         ${ARCHIVE_END}
         ${MATH_LIB}
         ${MKLDNN_LIB}
-        glog gflags protobuf snappystream snappy z
+        glog gflags protobuf snappystream snappy z xxhash
         ${EXTERNAL_LIB})

paddle/scripts/paddle_build.sh

@@ -95,9 +95,9 @@ function cmake_gen() {
                 exit 1
             fi
         fi
-    else 
+    else
         if [ "$1" != "" ]; then
-            echo "using python abi: $1"     
+            echo "using python abi: $1"
             if [ "$1" == "cp27-cp27m" ]; then
                 export LD_LIBRARY_PATH=/opt/_internal/cpython-2.7.11-ucs2/lib:${LD_LIBRARY_PATH#/opt/_internal/cpython-2.7.11-ucs4/lib:}
                 export PATH=/opt/python/cp27-cp27m/bin/:${PATH}
@@ -119,7 +119,7 @@ function cmake_gen() {
            fi
         fi
     fi
-    
+
     if [ "$SYSTEM" == "Darwin" ]; then
         WITH_DISTRIBUTE=${WITH_DISTRIBUTE:-ON}
         WITH_AVX=${WITH_AVX:-ON}
@@ -127,7 +127,7 @@ function cmake_gen() {
     else
         INFERENCE_DEMO_INSTALL_DIR=${INFERENCE_DEMO_INSTALL_DIR:-/root/.cache/inference_demo}
     fi
-    
+
     cat <<EOF
     ========================================
     Configuring cmake in /paddle/build ...
@@ -394,8 +394,8 @@ EOF
         export http_proxy=
         export https_proxy=
         # TODO: jiabin need to refine this part when these tests fixed on mac
-        ctest --output-on-failure -j $1     
-        # make install should also be test when unittest 
+        ctest --output-on-failure -j $1
+        # make install should also be test when unittest
         make install -j 8
         pip install --user ${INSTALL_PREFIX:-/paddle/build}/opt/paddle/share/wheels/*.whl
         if [[ ${WITH_FLUID_ONLY:-OFF} == "OFF" ]] ; then
@@ -659,7 +659,7 @@ function gen_fluid_lib() {
     Generating fluid library for train and inference ...
     ========================================
 EOF
-        cmake .. -DWITH_DISTRIBUTE=OFF
+        cmake .. -DWITH_DISTRIBUTE=OFF -DON_INFER=ON
         make -j `nproc` fluid_lib_dist
         make -j `nproc` inference_lib_dist
       fi

python/paddle/dataset/wmt16.py

@@ -78,7 +78,7 @@ def __build_dict(tar_file, dict_size, save_path, lang):
                     six.iteritems(word_dict), key=lambda x: x[1],
                     reverse=True)):
             if idx + 3 == dict_size: break
-            fout.write("%s\n" % (word[0]))
+            fout.write("%s\n" % (cpt.to_bytes(word[0])))
 
 
 def __load_dict(tar_file, dict_size, lang, reverse=False):

python/paddle/fluid/clip.py

@@ -272,7 +272,7 @@ class GradientClipByGlobalNorm(BaseGradientClipAttr):
                 )
 
         square = grad * grad
-        local_norm_var = layers.cast(layers.reduce_sum(input=square), 'float64')
+        local_norm_var = layers.reduce_sum(input=square)
         context[self.group_name].append(local_norm_var)
 
         self.context = context
@@ -282,7 +282,6 @@ class GradientClipByGlobalNorm(BaseGradientClipAttr):
         if group_scale_name not in self.context:
             group_norm_var = layers.sums(input=self.context[self.group_name])
             group_norm_var = layers.sqrt(x=group_norm_var)
-            group_norm_var = layers.cast(group_norm_var, 'float32')
             clip_var = self.context[self.group_name + "_clip"]
             group_scale_var = layers.elementwise_div(
                 x=clip_var,

python/paddle/fluid/evaluator.py

@@ -316,7 +316,7 @@ class DetectionMAP(Evaluator):
         gt_label (Variable): The ground truth label index, which is a LoDTensor
             with shape [N, 1].
         gt_box (Variable): The ground truth bounding box (bbox), which is a
-            LoDTensor with shape [N, 6]. The layout is [xmin, ymin, xmax, ymax].
+            LoDTensor with shape [N, 4]. The layout is [xmin, ymin, xmax, ymax].
         gt_difficult (Variable|None): Whether this ground truth is a difficult
             bounding bbox, which can be a LoDTensor [N, 1] or not set. If None,
             it means all the ground truth labels are not difficult bbox.

python/paddle/fluid/layers/nn.py

@@ -154,7 +154,9 @@ __all__ = [
     'mul',
     'sigmoid_cross_entropy_with_logits',
     'maxout',
+    'sequence_reverse',
     'affine_channel',
+    'hash',
 ]
 
 
@@ -980,7 +982,12 @@ def cos_sim(X, Y):
     return out
 
 
-def dropout(x, dropout_prob, is_test=False, seed=None, name=None):
+def dropout(x,
+            dropout_prob,
+            is_test=False,
+            seed=None,
+            name=None,
+            dropout_implementation="downgrade_in_infer"):
     """
     Computes dropout.
 
@@ -1000,6 +1007,21 @@ def dropout(x, dropout_prob, is_test=False, seed=None, name=None):
                     units will be dropped. DO NOT use a fixed seed in training.
         name (str|None): A name for this layer(optional). If set None, the layer
                          will be named automatically.
+        dropout_implementation(string): ['downgrade_in_infer'(defauld)|'upscale_in_train']
+                                        1. downgrade_in_infer(default), downgrade the outcome at inference
+                                           train: out = input * mask
+                                           inference: out = input * dropout_prob
+                                           (make is a tensor same shape with input, value is 0 or 1
+                                            ratio of 0 is dropout_prob)
+                                        2. upscale_in_train, upscale the outcome at training time
+                                           train: out = input * mask / ( 1.0 - dropout_prob )
+                                           inference: out = input
+                                           (make is a tensor same shape with input, value is 0 or 1
+                                            ratio of 0 is dropout_prob)
+                                           dropout op can be removed from the program. 
+                                           the program will be efficient
+                                        
+
 
     Returns:
         Variable: A tensor variable is the shape with `x`.
@@ -1029,7 +1051,8 @@ def dropout(x, dropout_prob, is_test=False, seed=None, name=None):
             'dropout_prob': dropout_prob,
             'is_test': is_test,
             'fix_seed': seed is not None,
-            'seed': seed if seed is not None else 0
+            'seed': seed if seed is not None else 0,
+            'dropout_implementation': dropout_implementation,
         })
     return out
 
@@ -1969,17 +1992,17 @@ def sequence_slice(input, offset, length, name=None):
     """
     **Sequence Slice Layer**
 
-    The layer crops a subsequence from given sequence with given start 
+    The layer crops a subsequence from given sequence with given start
     offset and subsequence length.
 
     It only supports sequence data (LoDTensor with lod_level equal to 1).
 
     .. code-block:: text
-    
+
 	- Case:
 
             Given the input Variable **input**:
-                
+
                 input.data = [[a1, a2], [b1, b2], [c1, c2], [d1, d2], [e1, e2]],
                 input.lod = [[3, 2]],
                 input.dims = (5, 2),
@@ -1987,16 +2010,16 @@ def sequence_slice(input, offset, length, name=None):
             with offset.data = [[0], [1]] and length.data = [[2], [1]],
 
             the output Variable will be
-                
+
                 out.data = [[a1, a2], [b1, b2], [e1, e2]],
                 out.lod = [[2, 1]],
                 out.dims = (3, 2).
-	
-    NOTE: The first dimension size of **input**, **offset** and **length** 
+
+    NOTE: The first dimension size of **input**, **offset** and **length**
           should be equal. The **offset** should start from 0.
-    
+
     Args:
-        input(Variable): The input Variable which consists of the complete 
+        input(Variable): The input Variable which consists of the complete
                          sequences.
         offset(Variable): The offset to slice each sequence.
         length(Variable): The length of each subsequence.
@@ -2015,7 +2038,7 @@ def sequence_slice(input, offset, length, name=None):
                               dtype='float32', lod_level=1)
              offset = fluid.layers.assign(input=np.array([[0, 1]]).astype("int32"))
              length = fluid.layers.assign(input=np.array([[2, 1]]).astype("int32"))
-             subseqs = fluid.layers.sequence_slice(input=seqs, offset=offset, 
+             subseqs = fluid.layers.sequence_slice(input=seqs, offset=offset,
                                                    length=length)
     """
     helper = LayerHelper("sequence_slice", **locals())
@@ -2398,12 +2421,12 @@ def layer_norm(input,
         param_attr(ParamAttr|None): The parameter attribute for the learnable
             gain :math:`g`. If :attr:`scale` is False, :attr:`param_attr` is
             omitted. If :attr:`scale` is True and :attr:`param_attr` is None,
-            a default :code:`ParamAttr` would be added as scale. The 
-            :attr:`param_attr` is initialized as 1 if it is added. Default None. 
+            a default :code:`ParamAttr` would be added as scale. The
+            :attr:`param_attr` is initialized as 1 if it is added. Default None.
         bias_attr(ParamAttr|None): The parameter attribute for the learnable
             bias :math:`b`. If :attr:`shift` is False, :attr:`bias_attr` is
             omitted. If :attr:`shift` is True and :attr:`param_attr` is None,
-            a default :code:`ParamAttr` would be added as bias. The 
+            a default :code:`ParamAttr` would be added as bias. The
             :attr:`bias_attr` is initialized as 0 if it is added. Default None.
         act(str): Activation to be applied to the output of layer normalizaiton.
                   Default None.
@@ -3021,8 +3044,8 @@ def sequence_unpad(x, length, name=None):
     """
     **Sequence Unpad Layer**
 
-    This layer removes the padding data in the input sequences and convert 
-    them into sequences with actual length as output, identitied by lod 
+    This layer removes the padding data in the input sequences and convert
+    them into sequences with actual length as output, identitied by lod
     information.
 
     .. code-block:: text
@@ -3032,9 +3055,9 @@ def sequence_unpad(x, length, name=None):
 	Given input Variable **x**:
 	    x.data = [[ 1.0,  2.0,  3.0,  4.0,  5.0],
 		      [ 6.0,  7.0,  8.0,  9.0, 10.0],
-		      [11.0, 12.0, 13.0, 14.0, 15.0]], 
-     
-	in which there are 3 sequences padded to length 5, and the acutal length 
+		      [11.0, 12.0, 13.0, 14.0, 15.0]],
+
+	in which there are 3 sequences padded to length 5, and the acutal length
 	specified by input Variable **length**:
 
 	    length.data = [[2], [3], [4]],
@@ -3042,7 +3065,7 @@ def sequence_unpad(x, length, name=None):
 	after unpadding, the output Variable will be:
 
 	    out.data = [[1.0, 2.0, 6.0, 7.0, 8.0, 11.0, 12.0, 13.0, 14.0]]
-	    out.lod = [[2, 3, 4]]      
+	    out.lod = [[2, 3, 4]]
 
     Args:
         x(Variable): Input Variable which contains the padded sequences with
@@ -4844,7 +4867,7 @@ def autoincreased_step_counter(counter_name=None, begin=1, step=1):
     return counter
 
 
-def reshape(x, shape, actual_shape=None, act=None, inplace=True, name=None):
+def reshape(x, shape, actual_shape=None, act=None, inplace=False, name=None):
     """
     Gives a new shape to the input Tensor without changing its data.
 
@@ -4892,15 +4915,22 @@ def reshape(x, shape, actual_shape=None, act=None, inplace=True, name=None):
                                 :attr:`shape` specifying shape. That is to
                                 say :attr:`actual_shape` has a higher priority
                                 than :attr:`shape`.
-        act (str): The non-linear activation to be applied to output variable.
-        inplace(bool): If this flag is set true, the output
-                       shares data with input without copying, otherwise
-                       a new output tensor is created
-                       whose data is copied from input x.
+        act (str): The non-linear activation to be applied to the reshaped tensor
+                   variable.
+        inplace(bool): Must use :attr:`False` if :attr:`x` is used in multiple
+                       operators. If this flag is set :attr:`True`, reuse input
+                       :attr:`x` to reshape, which will change the shape of
+                       tensor variable :attr:`x` and might cause errors when
+                       :attr:`x` is used in multiple operators. If :attr:`False`,
+                       preserve the shape :attr:`x` and create a new output tensor
+                       variable whose data is copied from input x but reshaped.
         name (str): The name of this layer. It is optional.
 
     Returns:
-        Variable: The output tensor.
+        Variable: The reshaped tensor variable if :attr:`act` is None. It is a \
+                  new tensor variable if :attr:`inplace` is :attr:`False`, \
+                  otherwise it is :attr:`x`. If :attr:`act` is not None, return \
+                  the activated tensor variable.
 
     Raises:
         TypeError: if actual_shape is neither Variable nor None.
@@ -4911,7 +4941,7 @@ def reshape(x, shape, actual_shape=None, act=None, inplace=True, name=None):
             data = fluid.layers.data(
                 name='data', shape=[2, 4, 6], dtype='float32')
             reshaped = fluid.layers.reshape(
-                x=data, shape=[-1, 0, 3, 2], act='tanh', inplace=True)
+                x=data, shape=[-1, 0, 3, 2], inplace=True)
     """
 
     if not (isinstance(shape, list) or isinstance(shape, tuple)):
@@ -4938,7 +4968,8 @@ def reshape(x, shape, actual_shape=None, act=None, inplace=True, name=None):
                 "except one unknown dimension.")
 
     helper = LayerHelper("reshape2", **locals())
-    out = helper.create_variable_for_type_inference(dtype=x.dtype)
+    out = x if inplace else helper.create_variable_for_type_inference(
+        dtype=x.dtype)
     x_shape = helper.create_variable_for_type_inference(dtype=x.dtype)
     helper.append_op(
         type="reshape2",
@@ -5469,9 +5500,9 @@ def roi_align(input,
     Examples:
         .. code-block:: python
 
-            align_out = fluid.layers.roi_align(input=x, 
-                                               rois=rois, 
-                                               pooled_height=7, 
+            align_out = fluid.layers.roi_align(input=x,
+                                               rois=rois,
+                                               pooled_height=7,
                                                pooled_width=7,
                                                spatial_scale=0.5,
                                                sampling_ratio=-1)
@@ -7455,13 +7486,40 @@ def maxout(x, groups, name=None):
     return out
 
 
+@templatedoc()
+def sequence_reverse(x, name=None):
+    """ 
+    ${comment}
+
+    Args:
+        x(${x_type}): ${x_comment}
+        name(basestring|None): Name of the output.
+
+    Returns:
+        out(${y_type}): ${y_comment}
+    """
+    helper = LayerHelper("sequence_reverse", **locals())
+    if name is None:
+        out = helper.create_variable_for_type_inference(dtype=x.dtype)
+    else:
+        out = helper.create_variable(
+            name=name, dtype=x.dtype, persistable=False)
+
+    helper.append_op(
+        type="sequence_reverse",
+        inputs={"X": x},
+        outputs={"Y": out},
+        attrs=dict())
+    return out
+
+
 def affine_channel(x, scale=None, bias=None, data_layout='NCHW', name=None):
     """
     Applies a separate affine transformation to each channel of the input.
     Useful for replacing spatial batch norm with its equivalent fixed
     transformation. The input also can be 2D tensor and applies a affine
     transformation in second dimension.
-    
+
     Args:
         x (Variable): Feature map input can be a 4D tensor with order NCHW
             or NHWC. It also can be a 2D tensor and the affine transformation
@@ -7494,3 +7552,31 @@ def affine_channel(x, scale=None, bias=None, data_layout='NCHW', name=None):
         attrs={"data_layout": data_layout},
         outputs={"Out": out})
     return out
+
+
+def hash(input, hash_size, num_hash=1, name=None):
+    """
+    hash the input
+     Args:
+        input (Variable): The input variable which is a one-hot word.
+        hash_size (int): The space size for hash algorithm.
+        num_hash (int): The times of hash, default 1.
+        name (str, default None): The name of this layer.
+     Returns:
+        Variable: The hash result variable which is a LoDTensor.
+     Examples:
+        .. code-block:: python
+            word_dict = paddle.dataset.imdb.word_dict()
+            x = fluid.layers.data(shape[1], dtype='int32', lod_level=1)
+            out = fluid.layers.hash(input=x, len(word_dict))
+    """
+    helper = LayerHelper('hash', **locals())
+    out = helper.create_variable_for_type_inference(
+        helper.input_dtype(), stop_gradient=True)
+    helper.append_op(
+        type='hash',
+        inputs={'X': input},
+        outputs={'Out': out},
+        attrs={'num_hash': num_hash,
+               'mod_by': hash_size})
+    return out

python/paddle/fluid/metrics.py

@@ -13,8 +13,6 @@
 # limitations under the License.
 """
 Fluid Metrics
-
-The metrics are accomplished via Python natively.
 """
 
 from __future__ import print_function
@@ -24,6 +22,12 @@ import copy
 import warnings
 import six
 
+from .layer_helper import LayerHelper
+from .initializer import Constant
+from . import unique_name
+from .framework import Program, Variable, program_guard
+from . import layers
+
 __all__ = [
     'MetricBase',
     'CompositeMetric',
@@ -474,71 +478,10 @@ class EditDistance(MetricBase):
                 "There is no data in EditDistance Metric. Please check layers.edit_distance output has been added to EditDistance."
             )
         avg_distance = self.total_distance / self.seq_num
-        avg_instance_error = self.instance_error / self.seq_num
+        avg_instance_error = self.instance_error / float(self.seq_num)
         return avg_distance, avg_instance_error
 
 
-class DetectionMAP(MetricBase):
-    """
-    Calculate the detection mean average precision (mAP).
-    mAP is the metric to measure the accuracy of object detectors
-    like Faster R-CNN, SSD, etc.
-    It is the average of the maximum precisions at different recall values.
-    Please get more information from the following articles:
-      https://sanchom.wordpress.com/tag/average-precision/
-
-      https://arxiv.org/abs/1512.02325
-
-    The general steps are as follows:
-
-        1. calculate the true positive and false positive according to the input
-            of detection and labels.
-        2. calculate mAP value, support two versions: '11 point' and 'integral'.
-
-    Examples:
-        .. code-block:: python
-
-            pred = fluid.layers.fc(input=data, size=1000, act="tanh")
-            batch_map = layers.detection_map(
-                input,
-                label,
-                class_num,
-                background_label,
-                overlap_threshold=overlap_threshold,
-                evaluate_difficult=evaluate_difficult,
-                ap_version=ap_version)
-            metric = fluid.metrics.DetectionMAP()
-            for data in train_reader():
-                loss, preds, labels = exe.run(fetch_list=[cost, batch_map])
-                batch_size = data[0]
-                metric.update(value=batch_map, weight=batch_size)
-                numpy_map = metric.eval()
-    """
-
-    def __init__(self, name=None):
-        super(DetectionMAP, self).__init__(name)
-        # the current map value
-        self.value = .0
-        self.weight = .0
-
-    def update(self, value, weight):
-        if not _is_number_or_matrix_(value):
-            raise ValueError(
-                "The 'value' must be a number(int, float) or a numpy ndarray.")
-        if not _is_number_(weight):
-            raise ValueError("The 'weight' must be a number(int, float).")
-        self.value += value
-        self.weight += weight
-
-    def eval(self):
-        if self.weight == 0:
-            raise ValueError(
-                "There is no data in DetectionMAP Metrics. "
-                "Please check layers.detection_map output has added to DetectionMAP."
-            )
-        return self.value / self.weight
-
-
 class Auc(MetricBase):
     """
     Auc metric adapts to the binary classification.
@@ -616,3 +559,179 @@ class Auc(MetricBase):
             idx -= 1
 
         return auc / tot_pos / tot_neg if tot_pos > 0.0 and tot_neg > 0.0 else 0.0
+
+
+class DetectionMAP(object):
+    """
+    Calculate the detection mean average precision (mAP).
+
+    The general steps are as follows:
+    1. calculate the true positive and false positive according to the input
+        of detection and labels.
+    2. calculate mAP value, support two versions: '11 point' and 'integral'.
+
+    Please get more information from the following articles:
+      https://sanchom.wordpress.com/tag/average-precision/
+      https://arxiv.org/abs/1512.02325
+
+    Args:
+        input (Variable): The detection results, which is a LoDTensor with shape
+            [M, 6]. The layout is [label, confidence, xmin, ymin, xmax, ymax].
+        gt_label (Variable): The ground truth label index, which is a LoDTensor
+            with shape [N, 1].
+        gt_box (Variable): The ground truth bounding box (bbox), which is a
+            LoDTensor with shape [N, 4]. The layout is [xmin, ymin, xmax, ymax].
+        gt_difficult (Variable|None): Whether this ground truth is a difficult
+            bounding bbox, which can be a LoDTensor [N, 1] or not set. If None,
+            it means all the ground truth labels are not difficult bbox.
+        class_num (int): The class number.
+        background_label (int): The index of background label, the background
+            label will be ignored. If set to -1, then all categories will be
+            considered, 0 by defalut.
+        overlap_threshold (float): The threshold for deciding true/false
+            positive, 0.5 by defalut.
+        evaluate_difficult (bool): Whether to consider difficult ground truth
+            for evaluation, True by defalut. This argument does not work when
+            gt_difficult is None.
+        ap_version (string): The average precision calculation ways, it must be
+            'integral' or '11point'. Please check
+            https://sanchom.wordpress.com/tag/average-precision/ for details.
+            - 11point: the 11-point interpolated average precision.
+            - integral: the natural integral of the precision-recall curve.
+
+    Examples:
+        .. code-block:: python
+
+            exe = fluid.Executor(place)
+            map_evaluator = fluid.Evaluator.DetectionMAP(input,
+                gt_label, gt_box, gt_difficult)
+            cur_map, accum_map = map_evaluator.get_map_var()
+            fetch = [cost, cur_map, accum_map]
+            for epoch in PASS_NUM:
+                map_evaluator.reset(exe)
+                for data in batches:
+                    loss, cur_map_v, accum_map_v = exe.run(fetch_list=fetch)
+
+        In the above example:
+
+            'cur_map_v' is the mAP of current mini-batch.
+            'accum_map_v' is the accumulative mAP of one pass.
+    """
+
+    def __init__(self,
+                 input,
+                 gt_label,
+                 gt_box,
+                 gt_difficult=None,
+                 class_num=None,
+                 background_label=0,
+                 overlap_threshold=0.5,
+                 evaluate_difficult=True,
+                 ap_version='integral'):
+
+        self.helper = LayerHelper('map_eval')
+        gt_label = layers.cast(x=gt_label, dtype=gt_box.dtype)
+        if gt_difficult:
+            gt_difficult = layers.cast(x=gt_difficult, dtype=gt_box.dtype)
+            label = layers.concat([gt_label, gt_difficult, gt_box], axis=1)
+        else:
+            label = layers.concat([gt_label, gt_box], axis=1)
+
+        # calculate mean average precision (mAP) of current mini-batch
+        map = layers.detection_map(
+            input,
+            label,
+            class_num,
+            background_label,
+            overlap_threshold=overlap_threshold,
+            evaluate_difficult=evaluate_difficult,
+            ap_version=ap_version)
+
+        states = []
+        states.append(
+            self._create_state(
+                dtype='int32', shape=None, suffix='accum_pos_count'))
+        states.append(
+            self._create_state(
+                dtype='float32', shape=None, suffix='accum_true_pos'))
+        states.append(
+            self._create_state(
+                dtype='float32', shape=None, suffix='accum_false_pos'))
+        var = self._create_state(dtype='int32', shape=[1], suffix='has_state')
+        self.helper.set_variable_initializer(
+            var, initializer=Constant(value=int(0)))
+        self.has_state = var
+
+        # calculate accumulative mAP
+        accum_map = layers.detection_map(
+            input,
+            label,
+            class_num,
+            background_label,
+            overlap_threshold=overlap_threshold,
+            evaluate_difficult=evaluate_difficult,
+            has_state=self.has_state,
+            input_states=states,
+            out_states=states,
+            ap_version=ap_version)
+
+        layers.fill_constant(
+            shape=self.has_state.shape,
+            value=1,
+            dtype=self.has_state.dtype,
+            out=self.has_state)
+
+        self.cur_map = map
+        self.accum_map = accum_map
+
+    def _create_state(self, suffix, dtype, shape):
+        """
+        Create state variable.
+        Args:
+            suffix(str): the state suffix.
+            dtype(str|core.VarDesc.VarType): the state data type
+            shape(tuple|list): the shape of state
+        Returns: State variable
+        """
+        state = self.helper.create_variable(
+            name="_".join([unique_name.generate(self.helper.name), suffix]),
+            persistable=True,
+            dtype=dtype,
+            shape=shape)
+        return state
+
+    def get_map_var(self):
+        """
+        Returns: mAP variable of current mini-batch and
+            accumulative mAP variable cross mini-batches.
+        """
+        return self.cur_map, self.accum_map
+
+    def reset(self, executor, reset_program=None):
+        """
+        Reset metric states at the begin of each pass/user specified batch.
+
+        Args:
+            executor(Executor): a executor for executing
+                the reset_program.
+            reset_program(Program|None): a single Program for reset process.
+                If None, will create a Program.
+        """
+
+        def _clone_var_(block, var):
+            assert isinstance(var, Variable)
+            return block.create_var(
+                name=var.name,
+                shape=var.shape,
+                dtype=var.dtype,
+                type=var.type,
+                lod_level=var.lod_level,
+                persistable=var.persistable)
+
+        if reset_program is None:
+            reset_program = Program()
+        with program_guard(main_program=reset_program):
+            var = _clone_var_(reset_program.current_block(), self.has_state)
+            layers.fill_constant(
+                shape=var.shape, value=0, dtype=var.dtype, out=var)
+        executor.run(reset_program)

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

@@ -1159,6 +1159,7 @@ def prepare_encoder(src_word,
             name=pos_enc_param_name,
             trainable=False,
             initializer=fluid.initializer.ConstantInitializer(0.001)))
+    src_pos_enc.stop_gradient = True
     enc_input = src_word_emb + src_pos_enc
     return layers.dropout(
         enc_input,

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

@@ -23,9 +23,8 @@ class TestDistCTR2x2(TestDistBase):
         self._sync_mode = True
         self._enforce_place = "CPU"
 
-
-def test_dist_ctr(self):
-    self.check_with_place("dist_ctr.py", delta=1e-7, check_error_log=False)
+    def test_dist_ctr(self):
+        self.check_with_place("dist_ctr.py", delta=1e-7, check_error_log=False)
 
 
 if __name__ == "__main__":

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

@@ -40,8 +40,7 @@ class TestDistMnistAsync(TestDistBase):
         self._sync_mode = False
         self._use_reduce = False
 
-    # FIXME(typhoonzero): fix async mode test later
-    def no_test_dist_train(self):
+    def test_dist_train(self):
         self.check_with_place("dist_mnist.py", delta=200)
 
 

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

@@ -40,8 +40,7 @@ class TestDistSeResneXt2x2Async(TestDistBase):
         self._sync_mode = False
         self._use_reader_alloc = False
 
-    #FIXME(typhoonzero): fix async mode later
-    def no_test_dist_train(self):
+    def test_dist_train(self):
         self.check_with_place("dist_se_resnext.py", delta=100)
 
 

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

@@ -79,8 +79,7 @@ class TestDistSimnetBow2x2SparseAsync(TestDistBase):
         self._sync_mode = False
         self._enforce_place = "CPU"
 
-    #FIXME(typhoonzero): fix async tests later
-    def no_test_simnet_bow(self):
+    def test_simnet_bow(self):
         need_envs = {
             "IS_DISTRIBUTED": '0',
             "IS_SPARSE": '1',

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

@@ -85,6 +85,69 @@ class TestDropoutOp5(OpTest):
         self.check_output()
 
 
+class TestDropoutOp6(TestDropoutOp):
+    def setUp(self):
+        self.op_type = "dropout"
+        self.inputs = {'X': np.random.random((32, 64)).astype("float32")}
+        self.attrs = {
+            'dropout_prob': 1.0,
+            'fix_seed': True,
+            'is_test': False,
+            'dropout_implementation': 'upscale_in_train'
+        }
+        self.outputs = {
+            'Out': np.zeros((32, 64)).astype('float32'),
+            'Mask': np.zeros((32, 64)).astype('float32')
+        }
+
+
+class TestDropoutOp7(TestDropoutOp):
+    def setUp(self):
+        self.op_type = "dropout"
+        self.inputs = {'X': np.random.random((32, 64, 2)).astype("float32")}
+        self.attrs = {
+            'dropout_prob': 0.0,
+            'fix_seed': True,
+            'is_test': False,
+            'dropout_implementation': 'upscale_in_train'
+        }
+        self.outputs = {
+            'Out': self.inputs['X'],
+            'Mask': np.ones((32, 64, 2)).astype('float32')
+        }
+
+
+class TestDropoutOp8(OpTest):
+    def setUp(self):
+        self.op_type = "dropout"
+        self.inputs = {'X': np.random.random((32, 64)).astype("float32")}
+        self.attrs = {
+            'dropout_prob': 0.35,
+            'fix_seed': True,
+            'is_test': True,
+            'dropout_implementation': 'upscale_in_train'
+        }
+        self.outputs = {'Out': self.inputs['X']}
+
+    def test_check_output(self):
+        self.check_output()
+
+
+class TestDropoutOp9(OpTest):
+    def setUp(self):
+        self.op_type = "dropout"
+        self.inputs = {'X': np.random.random((32, 64, 3)).astype("float32")}
+        self.attrs = {
+            'dropout_prob': 0.75,
+            'is_test': True,
+            'dropout_implementation': 'upscale_in_train'
+        }
+        self.outputs = {'Out': self.inputs['X']}
+
+    def test_check_output(self):
+        self.check_output()
+
+
 class TestFP16DropoutOp(OpTest):
     def setUp(self):
         self.op_type = "dropout"

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

+#   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.
+
+import unittest
+import numpy as np
+from op_test import OpTest
+
+
+class TestScaleOp(OpTest):
+    def setUp(self):
+        self.op_type = "hash"
+        self.init_test_case()
+        self.inputs = {'X': (self.in_seq, self.lod)}
+        self.attrs = {'num_hash': 4, 'mod_by': 10000}
+        self.outputs = {'Out': (self.out_seq, self.lod)}
+
+    def init_test_case(self):
+        np.random.seed = 1
+        self.in_seq = np.random.randint(0, 10, (30, 1)).astype("int32")
+        self.lod = [[9, 4, 11, 6]]
+        #  self.out_seq = np.ones([30, 4, 1], dtype=np.int32)
+        self.out_seq = [
+            [[9662], [9217], [1129], [8487]], [[9662], [9217], [1129], [8487]],
+            [[8310], [1327], [1654], [4567]], [[6897], [3218], [2013], [1241]],
+            [[9407], [6715], [6949], [8094]], [[8473], [694], [5142], [2479]],
+            [[8310], [1327], [1654], [4567]], [[6897], [3218], [2013], [1241]],
+            [[4372], [9456], [8204], [6695]], [[6897], [3218], [2013], [1241]],
+            [[8473], [694], [5142], [2479]], [[4372], [9456], [8204], [6695]],
+            [[4372], [9456], [8204], [6695]], [[8473], [694], [5142], [2479]],
+            [[9407], [6715], [6949], [8094]], [[9369], [4525], [8935], [9210]],
+            [[4372], [9456], [8204], [6695]], [[4372], [9456], [8204], [6695]],
+            [[9369], [4525], [8935], [9210]], [[6897], [3218], [2013], [1241]],
+            [[9038], [7951], [5953], [8657]], [[9407], [6715], [6949], [8094]],
+            [[9662], [9217], [1129], [8487]], [[9369], [4525], [8935], [9210]],
+            [[9038], [7951], [5953], [8657]], [[9662], [9217], [1129], [8487]],
+            [[9369], [4525], [8935], [9210]], [[1719], [5986], [9919], [3421]],
+            [[4372], [9456], [8204], [6695]], [[9038], [7951], [5953], [8657]]
+        ]
+        self.out_seq = np.array(self.out_seq)
+
+    def test_check_output(self):
+        self.check_output()
+
+
+if __name__ == "__main__":
+    unittest.main()

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

+#   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.
+
+import unittest
+
+import paddle.fluid as fluid
+from paddle.fluid.framework import Program, program_guard
+
+
+class TestMetricsDetectionMap(unittest.TestCase):
+    def test_detection_map(self):
+        program = fluid.Program()
+        with program_guard(program):
+            detect_res = fluid.layers.data(
+                name='detect_res',
+                shape=[10, 6],
+                append_batch_size=False,
+                dtype='float32')
+            label = fluid.layers.data(
+                name='label',
+                shape=[10, 1],
+                append_batch_size=False,
+                dtype='float32')
+            box = fluid.layers.data(
+                name='bbox',
+                shape=[10, 4],
+                append_batch_size=False,
+                dtype='float32')
+            map_eval = fluid.metrics.DetectionMAP(
+                detect_res, label, box, class_num=21)
+            cur_map, accm_map = map_eval.get_map_var()
+            self.assertIsNotNone(cur_map)
+            self.assertIsNotNone(accm_map)
+        print(str(program))
+
+
+if __name__ == '__main__':
+    unittest.main()

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

+# 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.
+
+import unittest
+import paddle.fluid as fluid
+import paddle.fluid.core as core
+from op_test import OpTest
+import numpy as np
+
+
+class TestSequenceReverseBase(OpTest):
+    def initParameters(self):
+        pass
+
+    def setUp(self):
+        self.size = (10, 3, 4)
+        self.lod = [2, 3, 5]
+        self.dtype = 'float32'
+        self.initParameters()
+        self.op_type = 'sequence_reverse'
+        self.x = np.random.random(self.size).astype(self.dtype)
+        self.y = self.get_output()
+
+        self.inputs = {'X': (self.x, [self.lod, ]), }
+        self.outputs = {'Y': (self.y, [self.lod, ]), }
+
+    def get_output(self):
+        tmp_x = np.reshape(self.x, newshape=[self.x.shape[0], -1])
+        tmp_y = np.ndarray(tmp_x.shape).astype(self.dtype)
+        prev_idx = 0
+        for cur_len in self.lod:
+            idx_range = range(prev_idx, prev_idx + cur_len)
+            tmp_y[idx_range, :] = np.flip(tmp_x[idx_range, :], 0)
+            prev_idx += cur_len
+
+        return np.reshape(tmp_y, newshape=self.x.shape).astype(self.dtype)
+
+    def test_output(self):
+        self.check_output(0)
+
+    def test_grad(self):
+        self.check_grad(['X'], 'Y')
+
+
+class TestSequenceReserve1(TestSequenceReverseBase):
+    def initParameters(self):
+        self.size = (12, 10)
+        self.lod = [4, 5, 3]
+
+
+class TestSequenceReverse2(TestSequenceReverseBase):
+    def initParameters(self):
+        self.size = (12, 10)
+        self.lod = [12]
+
+
+if __name__ == '__main__':
+    unittest.main()