Rename API of DeviceContext

Make them as usual names.

paddle/framework/init.cc

@@ -71,7 +71,7 @@ bool InitDevices(const std::vector<std::string> &devices) {
     places.emplace_back(platform::CPUPlace());
     LOG(WARNING) << "Not specified CPU device, create CPU by Default.";
   }
-  platform::DeviceContextPool::Create(places);
+  platform::DeviceContextPool::Init(places);
   return true;
 }
 

paddle/framework/operator.cc

@@ -388,8 +388,8 @@ void OperatorWithKernel::Run(const Scope& scope,
                              const platform::Place& place) const {
   RuntimeInferShapeContext infer_shape_ctx(*this, scope);
   this->InferShape(&infer_shape_ctx);
-  platform::DeviceContextPool& pool = platform::DeviceContextPool::Get();
-  auto dev_ctx = pool.Borrow(place);
+  platform::DeviceContextPool& pool = platform::DeviceContextPool::Instance();
+  auto dev_ctx = pool.Get(place);
 
   // check if op[type] has kernel registered.
   auto& all_op_kernels = AllOpKernels();

paddle/operators/array_operator.h

@@ -35,8 +35,8 @@ class ArrayOp : public framework::OperatorBase {
     PADDLE_ENFORCE_EQ(i_tensor.numel(), 1);
 
     // get device context from pool
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     size_t offset;
     if (platform::is_gpu_place(i_tensor.place())) {

paddle/operators/array_to_lod_tensor_op.cc

@@ -106,8 +106,9 @@ class ArrayToLoDTensorOp : public framework::OperatorBase {
         }
         auto slice = out->Slice(out_offset, out_offset + len);
 
-        platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-        auto &dev_ctx = *pool.Borrow(place);
+        platform::DeviceContextPool &pool =
+            platform::DeviceContextPool::Instance();
+        auto &dev_ctx = *pool.Get(place);
 
         framework::CopyFrom(x[x_idx].Slice(start_offset, end_offset), place,
                             dev_ctx, &slice);

paddle/operators/assign_op.cc

@@ -82,8 +82,8 @@ class AssignOp : public framework::OperatorBase {
         out != nullptr,
         "The Output(Out) should not be null if the Input(X) is set.");
 
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     framework::VisitVarType(*x, AssignFunctor(out, dev_ctx));
   }

paddle/operators/cond_op.cc

@@ -195,8 +195,8 @@ void CondOp::MergeDataFromSubnet(const framework::Scope& scope,
 
 void CondOp::Run(const Scope& scope, const platform::Place& place) const {
   // get device context from pool
-  platform::DeviceContextPool& pool = platform::DeviceContextPool::Get();
-  auto& dev_ctx = *pool.Borrow(place);
+  platform::DeviceContextPool& pool = platform::DeviceContextPool::Instance();
+  auto& dev_ctx = *pool.Get(place);
 
   PrepareDataForSubnet(scope, dev_ctx);
   std::vector<framework::Scope*>& sub_scopes = GetSubScopes(scope);

paddle/operators/feed_op.cc

@@ -49,8 +49,8 @@ class FeedOp : public framework::OperatorBase {
     auto *out_item = out_var->GetMutable<framework::FeedFetchType>();
 
     // get device context from pool
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     framework::CopyFrom(feed_item, place, dev_ctx, out_item);
     out_item->set_lod(feed_item.lod());

paddle/operators/fetch_op.cc

@@ -52,8 +52,8 @@ class FetchOp : public framework::OperatorBase {
 
     // FIXME(yuyang18): Should we assume the fetch operator always generate
     // CPU outputs?
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     CopyFrom(src_item, platform::CPUPlace(), dev_ctx, &dst_item);
     dev_ctx.Wait();

paddle/operators/fill_constant_op.cc

@@ -49,8 +49,8 @@ class FillConstantOp : public framework::OperatorBase {
       out.mutable_data(dev_place, framework::ToTypeIndex(data_type));
     }
 
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(dev_place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(dev_place);
     math::set_constant(dev_ctx, &out, value);
   }
 };

paddle/operators/fill_op.cc

@@ -69,8 +69,9 @@ class FillOp : public framework::OperatorBase {
 
     if (!force_cpu && platform::is_gpu_place(place)) {
       // Copy tensor to out
-      platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-      auto &dev_ctx = *pool.Borrow(place);
+      platform::DeviceContextPool &pool =
+          platform::DeviceContextPool::Instance();
+      auto &dev_ctx = *pool.Get(place);
       framework::CopyFrom(tensor, place, dev_ctx, &out);
     }
   }

paddle/operators/load_op.cc

@@ -40,8 +40,8 @@ class LoadOp : public framework::OperatorBase {
     auto *tensor = out_var->GetMutable<framework::LoDTensor>();
     framework::DeserializeFromStream(fin, tensor);
 
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     if (platform::is_gpu_place(place)) {
       // copy CPU to GPU

paddle/operators/lod_tensor_to_array_op.cc

@@ -88,8 +88,9 @@ class LoDTensorToArrayOp : public framework::OperatorBase {
         auto slice = out[i].Slice(static_cast<int>(offset),
                                   static_cast<int>(offset + len));
 
-        platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-        auto &dev_ctx = *pool.Borrow(place);
+        platform::DeviceContextPool &pool =
+            platform::DeviceContextPool::Instance();
+        auto &dev_ctx = *pool.Get(place);
 
         framework::CopyFrom(x.Slice(static_cast<int>(each_range.begin),
                                     static_cast<int>(each_range.end)),

paddle/operators/merge_lod_tensor_op.cc

@@ -30,8 +30,8 @@ class MergeLoDTensorOp : public framework::OperatorBase {
   void Run(const framework::Scope &scope,
            const platform::Place &dev_place) const override {
     // get device context from pool
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(dev_place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(dev_place);
 
     auto &x = scope.FindVar(Input("X"))->Get<framework::LoDTensor>();
     auto &mask = scope.FindVar(Input("Mask"))->Get<framework::LoDTensor>();

paddle/operators/recurrent_op.cc

@@ -272,8 +272,9 @@ class RecurrentOp : public RecurrentBase {
                    false /*create_local_scope*/);
 
       // get device context from pool
-      platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-      auto &dev_ctx = *pool.Borrow(place);
+      platform::DeviceContextPool &pool =
+          platform::DeviceContextPool::Instance();
+      auto &dev_ctx = *pool.Get(place);
 
       // Copy inside::output -> outside::output
       //    outside::output[seq_offset: seq_offset + 1] = inside::output
@@ -326,8 +327,8 @@ class RecurrentGradOp : public RecurrentBase {
     auto *program = block->Program();
 
     // get device context from pool
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     for (size_t step_id = 0; step_id < seq_len; ++step_id) {
       size_t seq_offset = reverse ? step_id : seq_len - step_id - 1;

paddle/operators/reorder_lod_tensor_by_rank_op.cc

@@ -131,8 +131,8 @@ class ReorderLoDTensorByRankTableBase : public framework::OperatorBase {
     auto x_sliced = x.Slice(x_offset, x_offset + len);
     auto out_sliced = out->Slice(out_offset, out_offset + len);
 
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
     framework::CopyFrom(x_sliced, out_sliced.place(), dev_ctx, &out_sliced);
     out_offset += len;
     return out_offset;

paddle/operators/save_op.cc

@@ -91,8 +91,8 @@ class SaveOp : public framework::OperatorBase {
     auto &tensor = var->Get<framework::LoDTensor>();
 
     // get device context from pool
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     framework::SerializeToStream(fout, tensor, dev_ctx);
   }

paddle/operators/shrink_rnn_memory_op.cc

@@ -106,8 +106,8 @@ class ShrinkRNNMemoryGradOp : public ArrayOp {
     dx_tensor.mutable_data(x_tensor.place(), x_tensor.type());
 
     // get device context from pool
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(place);
 
     if (dout_var == nullptr) {  // dx_tensor fill zero
       math::set_constant(dev_ctx, &dx_tensor, 0.0f);

paddle/operators/split_lod_tensor_op.cc

@@ -45,8 +45,8 @@ class SplitLoDTensorOp : public framework::OperatorBase {
     auto &x_lod = x.lod();
     auto &mask_dim = mask.dims();
 
-    platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-    auto &dev_ctx = *pool.Borrow(dev_place);
+    platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
+    auto &dev_ctx = *pool.Get(dev_place);
 
     std::unique_ptr<framework::LoDTensor> cpu_mask{new framework::LoDTensor()};
     if (platform::is_cpu_place(mask.place())) {

paddle/operators/tensor_array_read_write_op.cc

@@ -40,8 +40,9 @@ class WriteToArrayOp : public ArrayOp {
     if (x_tensor.memory_size() > 0) {
       auto *out_tensor = &out->at(offset);
 
-      platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-      auto &dev_ctx = *pool.Borrow(place);
+      platform::DeviceContextPool &pool =
+          platform::DeviceContextPool::Instance();
+      auto &dev_ctx = *pool.Get(place);
 
       CopyFrom(x_tensor, place, dev_ctx, out_tensor);
       out_tensor->set_lod(x_tensor.lod());
@@ -132,8 +133,9 @@ class ReadFromArrayOp : public ArrayOp {
     auto *out_tensor = out->GetMutable<framework::LoDTensor>();
     size_t offset = GetOffset(scope, place);
     if (offset < x_array.size()) {
-      platform::DeviceContextPool &pool = platform::DeviceContextPool::Get();
-      auto &dev_ctx = *pool.Borrow(place);
+      platform::DeviceContextPool &pool =
+          platform::DeviceContextPool::Instance();
+      auto &dev_ctx = *pool.Get(place);
       framework::CopyFrom(x_array[offset], place, dev_ctx, out_tensor);
       out_tensor->set_lod(x_array[offset].lod());
     } else {

paddle/platform/device_context.cc

@@ -17,7 +17,7 @@ namespace platform {
 
 DeviceContextPool* DeviceContextPool::pool = nullptr;
 
-const platform::DeviceContext* DeviceContextPool::Borrow(
+const platform::DeviceContext* DeviceContextPool::Get(
     const platform::Place& place) {
   auto it = device_contexts_.find(place);
   if (it == device_contexts_.end()) {
@@ -28,24 +28,6 @@ const platform::DeviceContext* DeviceContextPool::Borrow(
   return it->second;
 }
 
-std::vector<const platform::DeviceContext*> DeviceContextPool::Borrow(
-    const std::vector<platform::Place>& places) {
-  PADDLE_ENFORCE_GT(places.size(), 0);
-  PADDLE_ENFORCE_LE(places.size(), device_contexts_.size());
-  std::vector<const platform::DeviceContext*> borrowed_contexts;
-  for (auto& place : places) {
-    auto it = device_contexts_.find(place);
-    if (it != device_contexts_.end()) {
-      borrowed_contexts.emplace_back(it->second);
-    } else {
-      PADDLE_THROW(
-          "'Place' is not supported, Please re-compile with WITH_GPU "
-          "option");
-    }
-  }
-  return borrowed_contexts;
-}
-
 DeviceContextPool::DeviceContextPool(
     const std::vector<platform::Place>& places) {
   PADDLE_ENFORCE_GT(places.size(), 0);

paddle/platform/device_context.h

@@ -109,13 +109,13 @@ class DeviceContextPool {
  public:
   explicit DeviceContextPool(const std::vector<platform::Place>& places);
 
-  static DeviceContextPool& Get() {
+  static DeviceContextPool& Instance() {
     PADDLE_ENFORCE_NOT_NULL(pool, "Need to Create DeviceContextPool first!");
     return *pool;
   }
 
   /*! \brief  Create should only called by Init function */
-  static DeviceContextPool& Create(const std::vector<platform::Place>& places) {
+  static DeviceContextPool& Init(const std::vector<platform::Place>& places) {
     if (pool == nullptr) {
       pool = new DeviceContextPool(places);
     }
@@ -123,13 +123,7 @@ class DeviceContextPool {
   }
 
   /*! \brief  Return handle of single device context. */
-  const platform::DeviceContext* Borrow(const platform::Place& place);
-
-  /*! \brief  Return handle of multi-device context. */
-  std::vector<const platform::DeviceContext*> Borrow(
-      const std::vector<platform::Place>& places);
-
-  ~DeviceContextPool() {}
+  const platform::DeviceContext* Get(const platform::Place& place);
 
  private:
   static DeviceContextPool* pool;

paddle/platform/device_context_test.cu

@@ -71,35 +71,20 @@ TEST(Device, DeviceContextPool) {
   using paddle::platform::CPUPlace;
   using paddle::platform::CUDAPlace;
 
-  DeviceContextPool& pool = DeviceContextPool::Get();
-  auto cpu_dev_ctx1 = pool.Borrow(CPUPlace());
-  auto cpu_dev_ctx2 = pool.Borrow(CPUPlace());
-  EXPECT_TRUE(cpu_dev_ctx2 == cpu_dev_ctx1);
+  DeviceContextPool& pool = DeviceContextPool::Instance();
+  auto cpu_dev_ctx1 = pool.Get(CPUPlace());
+  auto cpu_dev_ctx2 = pool.Get(CPUPlace());
+  ASSERT_EQ(cpu_dev_ctx2, cpu_dev_ctx1);
 
   std::vector<Place> gpu_places;
   int count = paddle::platform::GetCUDADeviceCount();
   for (int i = 0; i < count; ++i) {
-    gpu_places.emplace_back(CUDAPlace(i));
-  }
-  auto dev_ctxs = pool.Borrow(gpu_places);
-  for (size_t i = 0; i < dev_ctxs.size(); ++i) {
-    auto* dev_ctx = static_cast<const CUDADeviceContext*>(dev_ctxs[i]);
-
-    // check same as CUDAPlace(i)
-    CUDAPlace place = boost::get<CUDAPlace>(dev_ctx->GetPlace());
-    EXPECT_EQ(place.GetDeviceId(), static_cast<int>(i));
+    auto dev_ctx = pool.Get(CUDAPlace(i));
+    ASSERT_NE(dev_ctx, nullptr);
   }
 }
 
 int main(int argc, char** argv) {
-  int dev_count = paddle::platform::GetCUDADeviceCount();
-  if (dev_count <= 1) {
-    LOG(WARNING) << "Cannot test multi-gpu DeviceContextPool, because the CUDA "
-                    "device count is "
-                 << dev_count;
-    return 0;
-  }
-
   std::vector<paddle::platform::Place> places;
 
   places.emplace_back(paddle::platform::CPUPlace());
@@ -109,7 +94,7 @@ int main(int argc, char** argv) {
   }
 
   VLOG(0) << " DeviceCount " << count;
-  paddle::platform::DeviceContextPool::Create(places);
+  paddle::platform::DeviceContextPool::Init(places);
 
   testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();

paddle/platform/nccl_test.cu

@@ -144,7 +144,7 @@ int main(int argc, char** argv) {
   }
 
   VLOG(0) << " DeviceCount " << count;
-  paddle::platform::DeviceContextPool::Create(places);
+  paddle::platform::DeviceContextPool::Init(places);
 
   testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();