Actual source code: PetscGetCPUTime.c
1: /*$Id: PetscGetCPUTime.c,v 1.12 2001/08/29 20:59:41 balay Exp $*/
3: #include petsc.h
7: int main(int argc,char **argv)
8: {
9: PetscLogDouble x,y;
10: long int i,j,A[100000],ierr;
11:
12: PetscInitialize(&argc,&argv,0,0);
13: /* To take care of paging effects */
14: PetscGetCPUTime(&y);
16: for (i=0; i<2; i++) {
17: PetscGetCPUTime(&x);
19: /*
20: Do some work for at least 1 ms. Most CPU timers
21: cannot measure anything less than that
22: */
23:
24: for (j=0; j<20000*(i+1); j++) {
25: A[j]=i+j;
26: }
27: PetscGetCPUTime(&y);
28: fprintf(stdout,"%-15s : %e sec\n","PetscGetCPUTime",(y-x)/10.0);
29: }
31: PetscFinalize();
32: return(0);
33: }