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Nvidia Stream Benchmarks with CUDA Events #5

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Nvidia Stream Benchmarks with CUDA Events #5

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7961530
Replaced the depricated function call to cudaThreadSynchronize
Mar 18, 2019
3cbe687
Performing the stream benchmarks with CUDA Events
Apr 3, 2019
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47 changes: 28 additions & 19 deletions stream.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,8 @@

Written by: Massimiliano Fatica, NVIDIA Corporation

Further modifications by: Ben Cumming, CSCS; Andreas Herten (JSC/FZJ)
Further modifications by: Ben Cumming, CSCS; Andreas Herten (JSC/FZJ);
Prashanth Kanduri, CSCS
*/

#define NTIMES 20
Expand Down Expand Up @@ -146,7 +147,7 @@ int main(int argc, char** argv)
{
real *d_a, *d_b, *d_c;
int j,k;
double times[4][NTIMES];
float times[4][NTIMES];
real scalar;
std::vector<std::string> label{"Copy: ", "Scale: ", "Add: ", "Triad: "};

Expand Down Expand Up @@ -181,31 +182,39 @@ int main(int argc, char** argv)
set_array<real><<<dimGrid,dimBlock>>>(d_c, .5f, N);

/* --- MAIN LOOP --- repeat test cases NTIMES times --- */
cudaEvent_t start, stop;
cudaEventCreate(&start);
cudaEventCreate(&stop);


scalar=3.0f;
for (k=0; k<NTIMES; k++)
{
times[0][k]= mysecond();
cudaEventRecord(start);
STREAM_Copy<real><<<dimGrid,dimBlock>>>(d_a, d_c, N);
cudaThreadSynchronize();
times[0][k]= mysecond() - times[0][k];
cudaEventRecord(stop);
cudaEventSynchronize(stop);
cudaEventElapsedTime(&times[0][k], start, stop);

times[1][k]= mysecond();
cudaEventRecord(start);
STREAM_Scale<real><<<dimGrid,dimBlock>>>(d_b, d_c, scalar, N);
cudaThreadSynchronize();
times[1][k]= mysecond() - times[1][k];
cudaEventRecord(stop);
cudaEventSynchronize(stop);
cudaEventElapsedTime(&times[1][k], start, stop);

times[2][k]= mysecond();
cudaEventRecord(start);
STREAM_Add<real><<<dimGrid,dimBlock>>>(d_a, d_b, d_c, N);
cudaThreadSynchronize();
times[2][k]= mysecond() - times[2][k];
cudaEventRecord(stop);
cudaEventSynchronize(stop);
cudaEventElapsedTime(&times[2][k], start, stop);

times[3][k]= mysecond();
cudaEventRecord(start);
STREAM_Triad<real><<<dimGrid,dimBlock>>>(d_b, d_c, d_a, scalar, N);
cudaThreadSynchronize();
times[3][k]= mysecond() - times[3][k];
}
cudaEventRecord(stop);
cudaEventSynchronize(stop);
cudaEventElapsedTime(&times[3][k], start, stop);

}
/* --- SUMMARY --- */

for (k=1; k<NTIMES; k++) /* note -- skip first iteration */
Expand Down Expand Up @@ -235,10 +244,10 @@ int main(int argc, char** argv)
avgtime[j] = avgtime[j]/(double)(NTIMES-1);

printf("%s%11.4f %11.8f %11.8f %11.8f\n", label[j].c_str(),
bytes[j]/mintime[j] / G,
avgtime[j],
mintime[j],
maxtime[j]);
1e3*bytes[j]/mintime[j] / G,
1e-3*avgtime[j],
1e-3*mintime[j],
1e-3*maxtime[j]);
}


Expand Down