1 /* Copyright 2015 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 16 #ifndef TENSORFLOW_CORE_COMMON_RUNTIME_LOCAL_DEVICE_H_ 17 #define TENSORFLOW_CORE_COMMON_RUNTIME_LOCAL_DEVICE_H_ 18 19 #include "tensorflow/core/common_runtime/device.h" 20 #include "tensorflow/core/framework/device_attributes.pb.h" 21 #include "tensorflow/core/platform/macros.h" 22 23 namespace tensorflow { 24 25 namespace test { 26 class Benchmark; 27 } 28 struct SessionOptions; 29 30 // This class is shared by ThreadPoolDevice and GPUDevice and 31 // initializes a shared Eigen compute device used by both. This 32 // should eventually be removed once we refactor ThreadPoolDevice and 33 // GPUDevice into more 'process-wide' abstractions. 34 class LocalDevice : public Device { 35 public: 36 LocalDevice(const SessionOptions& options, 37 const DeviceAttributes& attributes); 38 ~LocalDevice() override; 39 40 private: 41 static bool use_global_threadpool_; 42 set_use_global_threadpool(bool use_global_threadpool)43 static void set_use_global_threadpool(bool use_global_threadpool) { 44 use_global_threadpool_ = use_global_threadpool; 45 } 46 47 struct EigenThreadPoolInfo; 48 std::unique_ptr<EigenThreadPoolInfo> owned_tp_info_; 49 50 // All ThreadPoolDevices in the process associated with the same 51 // NUMA node will share a single fixed sized threadpool for numerical 52 // computations. 53 static mutex global_tp_mu_; 54 static gtl::InlinedVector<EigenThreadPoolInfo*, 4> global_tp_info_ 55 TF_GUARDED_BY(global_tp_mu_); 56 57 friend class test::Benchmark; 58 59 TF_DISALLOW_COPY_AND_ASSIGN(LocalDevice); 60 }; 61 62 } // namespace tensorflow 63 64 #endif // TENSORFLOW_CORE_COMMON_RUNTIME_LOCAL_DEVICE_H_ 65