1 #ifdef PETSC_RCS_HEADER 2 static char vcid[] = "$Id: PetscGetCPUTime.c,v 1.1 1997/07/23 16:22:44 balay Exp bsmith $"; 3 #endif 4 5 #include "petsc.h" 6 7 int main( int argc, char **argv) 8 { 9 PLogDouble x, y; 10 long int i,j,A[100000]; 11 12 PetscInitialize(&argc, &argv,0,0); 13 /* To take care of paging effects */ 14 y = PetscGetCPUTime(); 15 16 for ( i=0; i<2; i++ ) { 17 x = PetscGetCPUTime(); 18 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 y = PetscGetCPUTime(); 28 fprintf(stderr,"%-15s : %e sec\n","PetscGetCPUTime", (y-x)/10.0); 29 } 30 31 PetscFinalize(); 32 PetscFunctionReturn(0); 33 } 34