| /* Copyright 2016 The TensorFlow 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. |
| ==============================================================================*/ |
| |
| #ifndef TENSORFLOW_STREAM_EXECUTOR_HOST_HOST_TIMER_H_ |
| #define TENSORFLOW_STREAM_EXECUTOR_HOST_HOST_TIMER_H_ |
| |
| #include <chrono> |
| |
| #include "tensorflow/stream_executor/stream_executor_internal.h" |
| |
| namespace stream_executor { |
| namespace host { |
| |
| class HostTimer : public internal::TimerInterface { |
| public: |
| HostTimer() {} |
| ~HostTimer() override {} |
| |
| // Begins the timer at the present point in the stream. |
| bool Start(Stream *stream); |
| |
| // Stops the timer at the present point in the stream. |
| bool Stop(Stream *stream); |
| |
| // Returns the most recent value recorded for a start/stopcycle, in |
| // microseconds. |
| uint64 Microseconds() const override; |
| |
| // Returns the most recent value recorded for a start/stopcycle, in |
| // nanoseconds. |
| uint64 Nanoseconds() const override; |
| |
| private: |
| using clock = std::chrono::high_resolution_clock; |
| |
| clock::time_point start_time_; |
| clock::duration duration_; |
| |
| // Actually starts (rather than enqueues starting) the timer. |
| void StartNow(); |
| |
| // Actually stops (rather than enqueues stopping) the timer. |
| void StopNow(); |
| }; |
| |
| } // namespace host |
| } // namespace stream_executor |
| |
| #endif // TENSORFLOW_STREAM_EXECUTOR_HOST_HOST_TIMER_H_ |