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ispc generates slooow code ..

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This commit is contained in:
Evghenii
2014-01-30 14:47:18 +01:00
parent f90688b089
commit 5e37370618
4 changed files with 60 additions and 42 deletions
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6
examples_ptx/nbody/nbody.cpp
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@@ -13,9 +13,11 @@ typedef double real;
int main (int argc, char *argv[])
{
int i, j, n = argc == 1 ? 1024*1024: atoi(argv[1]), m = n < 100 ? 1 : 50, l = n < 100 ? n : RAND_MAX;
int i, j, n = argc == 1 ? 2048: atoi(argv[1]), m = n < 100 ? 1 : 50, l = n < 100 ? n : RAND_MAX;
double tISPC1 = 0.0, tISPC2 = 0.0, tSerial = 0.0;
printf(" nbodies= %d\n", n);
Plummer plummer(n);
real *posx = new real[n];
@@ -55,7 +57,7 @@ int main (int argc, char *argv[])
tISPC2 = get_elapsed_msec();
fprintf(stderr, " %d iterations took %g sec; perf= %g GFlops\n",
nSteps, tISPC2/1e3,
20*n*n/(tISPC2/1e3/1e9));
nSteps * 22.0*n*n/(tISPC2/1e3)/1e9);
}
ispc::closeNbody();