1*d8e9fea7SSatish Balay #ifndef lint 2*d8e9fea7SSatish Balay static char vcid[] = "$Id: MPI_Wtime.c,v 1.3 1996/03/06 17:40:32 balay Exp $"; 3*d8e9fea7SSatish Balay #endif 4*d8e9fea7SSatish Balay 5b0878937SSatish Balay #include "stdio.h" 6b0878937SSatish Balay #include "petsc.h" 7b0878937SSatish Balay 8b0878937SSatish Balay int main( int argc, char **argv) 9b0878937SSatish Balay { 10b0878937SSatish Balay double x, y,z; 11b0878937SSatish Balay int A[10000]; 12b0878937SSatish Balay 13b0878937SSatish Balay PetscInitialize(&argc, &argv,0,0,0); 14b0878937SSatish Balay /* To take care of paging effects */ 15b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 16b0878937SSatish Balay x = PetscGetTime(); 17b0878937SSatish Balay 18b0878937SSatish Balay x = PetscGetTime(); 19b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 20b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 21b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 22b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 23b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 24b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 25b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 26b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 27b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 28b0878937SSatish Balay PetscMemzero(A,sizeof(int)*10000); 29b0878937SSatish Balay y = PetscGetTime(); 30b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 31b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 32b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 33b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 34b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 35b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 36b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 37b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 38b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 39b0878937SSatish Balay PetscMemzero(A,sizeof(int)*0); 40b0878937SSatish Balay z = PetscGetTime(); 41b0878937SSatish Balay 42b0878937SSatish Balay fprintf(stderr,"%s : \n","PetscMemzero"); 43b0878937SSatish Balay fprintf(stderr," %-11s : %e sec\n","Latency",(z-y)/10.0); 44b0878937SSatish Balay fprintf(stderr," %-11s : %e sec\n","Per byte",(2*y-x-z)/100000.0); 45b0878937SSatish Balay 46b0878937SSatish Balay PetscFinalize(); 47b0878937SSatish Balay return 0; 48b0878937SSatish Balay } 49