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91 lines
2.5 KiB
91 lines
2.5 KiB
/* |
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* |
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* nullKernelAsync.cu |
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* |
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* Microbenchmark for throughput of asynchronous kernel launch. |
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* |
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* Build with: nvcc -I ../chLib <options> nullKernelAsync.cu |
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* Requires: No minimum SM requirement. |
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* |
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* Copyright (c) 2011-2014, Archaea Software, LLC. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include <stdio.h> |
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//#include "chError.h" |
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#include "chTimer.h" |
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#include <hip/hip_runtime.h> |
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#define cuda( fn ) do { \ |
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status = (hip##fn); \ |
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if ( hipSuccess != (status) ) { \ |
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goto Error; \ |
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} \ |
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} while (0); |
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__global__ |
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void |
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NullKernel() |
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{ |
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} |
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double |
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usPerLaunch( int cIterations ) |
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{ |
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hipError_t status; |
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double microseconds, ret; |
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chTimerTimestamp start, stop; |
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cuda(Free(0)); |
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chTimerGetTime( &start ); |
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for ( int i = 0; i < cIterations; i++ ) { |
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NullKernel<<<1,1>>>(); |
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} |
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cuda(DeviceSynchronize()); |
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chTimerGetTime( &stop ); |
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microseconds = 1e6*chTimerElapsedTime( &start, &stop ); |
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ret = microseconds / (float) cIterations; |
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Error: |
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return (status) ? 0.0 : ret; |
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} |
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int |
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main( int argc, char *argv[] ) |
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{ |
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const int cIterations = 100000; |
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printf( "Measuring asynchronous launch time... " ); fflush( stdout ); |
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printf( "%.2f us\n", usPerLaunch(cIterations) ); |
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return 0; |
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}
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