cutlass/tools/profiler/src/gpu_timer.h

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/***************************************************************************************************
* Copyright (c) 2017-2019, NVIDIA CORPORATION. All rights reserved.
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*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************************************/
/* \file
\brief Defines a math function
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*/
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#pragma once
#include <cuda_runtime.h>
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namespace cutlass {
namespace profiler {
/////////////////////////////////////////////////////////////////////////////////////////////////
struct GpuTimer {
cudaEvent_t events[2];
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//
// Methods
//
GpuTimer();
~GpuTimer();
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/// Records a start event in the stream
void start(cudaStream_t stream = nullptr);
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/// Records a stop event in the stream
void stop(cudaStream_t stream = nullptr);
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/// Records a stop event in the stream and synchronizes on the stream
void stop_and_wait(cudaStream_t stream = nullptr);
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/// Returns the duration in miliseconds
double duration(int iterations = 1) const;
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};
/////////////////////////////////////////////////////////////////////////////////////////////////
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} // namespace profiler
} // namespace cutlass