Actual source code: PetscGetCPUTime.c
1: #include <petsctime.h>
3: int main(int argc,char **argv)
4: {
5: PetscLogDouble x,y;
6: long int i,j,A[100000],ierr;
8: PetscCall(PetscInitialize(&argc,&argv,0,0));
9: /* To take care of paging effects */
10: PetscCall(PetscGetCPUTime(&y));
12: for (i=0; i<2; i++) {
13: PetscCall(PetscGetCPUTime(&x));
15: /*
16: Do some work for at least 1 ms. Most CPU timers
17: cannot measure anything less than that
18: */
20: for (j=0; j<20000*(i+1); j++) A[j]=i+j;
21: PetscCall(PetscGetCPUTime(&y));
22: fprintf(stdout,"%-15s : %e sec\n","PetscGetCPUTime",(y-x)/10.0);
23: }
25: PetscCall(PetscFinalize());
26: return 0;
27: }