1 /* Copyright 2018 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 #ifndef TENSORFLOW_CORE_COMMON_RUNTIME_EAGER_COPY_TO_DEVICE_NODE_H_ 16 #define TENSORFLOW_CORE_COMMON_RUNTIME_EAGER_COPY_TO_DEVICE_NODE_H_ 17 18 #include "tensorflow/core/common_runtime/device.h" 19 #include "tensorflow/core/common_runtime/eager/eager_executor.h" 20 #include "tensorflow/core/common_runtime/eager/tensor_handle.h" 21 #include "tensorflow/core/framework/tensor.h" 22 #include "tensorflow/core/lib/core/status.h" 23 #include "tensorflow/core/profiler/lib/scoped_memory_debug_annotation.h" 24 25 namespace tensorflow { 26 27 class CopyToDeviceNode : public EagerNode { 28 public: CopyToDeviceNode(TensorHandle * src,TensorHandle * dst,Device * dstd,const EagerContext & ctx,bool async,bool mirror)29 CopyToDeviceNode(TensorHandle* src, TensorHandle* dst, Device* dstd, 30 const EagerContext& ctx, bool async, bool mirror) 31 : EagerNode(), 32 src_(src), 33 dst_(dst), 34 dstd_(dstd), 35 ctx_(ctx), 36 async_(async), 37 mirror_(mirror) { 38 if (async_) { 39 src_->Ref(); 40 dst_->Ref(); 41 } 42 } 43 ~CopyToDeviceNode()44 ~CopyToDeviceNode() override { 45 if (async_) { 46 src_->Unref(); 47 dst_->Unref(); 48 } 49 } 50 Run()51 Status Run() override { 52 tensorflow::Tensor tensor; 53 profiler::ScopedMemoryDebugAnnotation op_annotation( 54 "eager::CopyToDeviceNode", "dynamic", tensor.dtype(), 55 [&tensor]() { return tensor.shape().DebugString(); }); 56 TF_RETURN_IF_ERROR(src_->CopyToDevice(ctx_, dstd_, &tensor)); 57 if (!async_ && mirror_) { 58 Status s = dst_->AddLocalMirror(std::move(tensor), dstd_); 59 // If a mirror was added since we called HasLocalMirror then just return 60 // and ignore the error. 61 if (s.ok() || (s.code() == error::Code::ALREADY_EXISTS)) { 62 return OkStatus(); 63 } 64 return s; 65 } else { 66 return dst_->SetTensor(std::move(tensor), dstd_); 67 } 68 } 69 Abort(Status status)70 void Abort(Status status) override { dst_->Poison(status, dstd_); } 71 DebugString()72 string DebugString() const override { 73 string out = "[CopyToDeviceNode]"; 74 strings::StrAppend(&out, " src_tensor: ", src_->DebugString()); 75 strings::StrAppend(&out, ", dst_tensor: ", dst_->DebugString()); 76 strings::StrAppend(&out, ", dst_device: ", dstd_ ? dstd_->name() : "[]"); 77 return out; 78 } 79 dst()80 TensorHandle* dst() { return dst_; } 81 82 private: 83 TensorHandle* src_; 84 TensorHandle* dst_; 85 Device* dstd_; 86 const EagerContext& ctx_; 87 bool async_; 88 bool mirror_; 89 }; 90 91 } // namespace tensorflow 92 93 #endif // TENSORFLOW_CORE_COMMON_RUNTIME_EAGER_COPY_TO_DEVICE_NODE_H_ 94