1 /* Copyright 2016 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 #include "tensorflow/stream_executor/host/host_timer.h" 17 18 #include "tensorflow/stream_executor/platform/logging.h" 19 #include "tensorflow/stream_executor/stream.h" 20 #include "tensorflow/stream_executor/stream_executor_internal.h" 21 22 namespace stream_executor { 23 namespace host { 24 25 using std::chrono::duration_cast; 26 Start(Stream * stream)27bool HostTimer::Start(Stream* stream) { 28 return stream->ThenDoHostCallback([this]() { this->StartNow(); }).ok(); 29 } 30 Stop(Stream * stream)31bool HostTimer::Stop(Stream* stream) { 32 return stream->ThenDoHostCallback([this]() { this->StopNow(); }).ok(); 33 } 34 Microseconds() const35uint64 HostTimer::Microseconds() const { 36 return duration_cast<std::chrono::microseconds>(duration_).count(); 37 } 38 Nanoseconds() const39uint64 HostTimer::Nanoseconds() const { 40 return duration_cast<std::chrono::nanoseconds>(duration_).count(); 41 } 42 StartNow()43void HostTimer::StartNow() { start_time_ = clock::now(); } 44 StopNow()45void HostTimer::StopNow() { duration_ = clock::now() - start_time_; } 46 47 } // namespace host 48 } // namespace stream_executor 49