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/*
* Copyright 2008-2009 NVIDIA Corporation
*
* 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.
*/
#pragma once
#include <cuda.h>
namespace cusp
{
namespace detail
{
class timer
{
public:
size_t calls;
bool paused;
double milliseconds;
cudaEvent_t _start;
cudaEvent_t _end;
timer() : _start(NULL), _end(NULL)
{
reset();
}
~timer()
{
stop();
}
void operator+=(const timer &b)
{
milliseconds += b.milliseconds;
calls += b.calls;
}
bool is_empty(void) const { return milliseconds == 0.0; }
bool is_paused(void) const { return paused; }
void unpause(void)
{
cudaEventRecord(_start,0);
paused = false;
}
void pause(void)
{
stop();
cudaEventCreate(&_start);
cudaEventCreate(&_end);
paused = true;
}
void start(void)
{
++calls;
cudaEventCreate(&_start);
cudaEventCreate(&_end);
cudaEventRecord(_start,0);
}
void stop(void)
{
if(_start != NULL && _end != NULL )
{
milliseconds += milliseconds_elapsed();
cudaEventDestroy(_start);
cudaEventDestroy(_end);
_start = NULL;
_end = NULL;
}
}
void soft_stop(void)
{
if ( !paused )
milliseconds = milliseconds_elapsed();
}
void reset(void)
{
if(_start != NULL ) cudaEventDestroy(_start);
if(_end != NULL ) cudaEventDestroy(_end);
cudaEventCreate(&_start);
cudaEventCreate(&_end);
calls = 0;
paused = false;
milliseconds = 0.0;
}
void soft_reset(void)
{
calls = 0;
milliseconds = 0.0;
cudaEventDestroy(_start);
cudaEventDestroy(_end);
cudaEventCreate(&_start);
cudaEventCreate(&_end);
}
float milliseconds_elapsed()
{
float elapsed_time;
cudaEventRecord(_end, 0);
cudaEventSynchronize(_end);
cudaEventElapsedTime(&elapsed_time, _start, _end);
return elapsed_time;
}
float seconds_elapsed()
{
return milliseconds_elapsed() / 1000.0;
}
};
} // end namespace detail
} // end namespace cusp
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