1 #ifdef PETSC_RCS_HEADER 2 static char vcid[] = "$Id: PetscMemcmp.c,v 1.7 1997/07/09 21:01:29 balay Exp bsmith $"; 3 #endif 4 5 #include "petsc.h" 6 7 int main( int argc, char **argv) 8 { 9 PLogDouble x, y, z; 10 Scalar A[10000], B[10000]; 11 int i; 12 13 PetscInitialize(&argc, &argv,0,0); 14 15 for (i=0; i<10000; i++) { 16 A[i] = i%61897; 17 B[i] = i%61897; 18 } 19 /* To take care of paging effects */ 20 PetscMemcmp(A,B,sizeof(Scalar)*0); 21 x = PetscGetTime(); 22 23 x = PetscGetTime(); 24 PetscMemcmp(A,B,sizeof(Scalar)*10000); 25 PetscMemcmp(A,B,sizeof(Scalar)*10000); 26 PetscMemcmp(A,B,sizeof(Scalar)*10000); 27 PetscMemcmp(A,B,sizeof(Scalar)*10000); 28 PetscMemcmp(A,B,sizeof(Scalar)*10000); 29 PetscMemcmp(A,B,sizeof(Scalar)*10000); 30 PetscMemcmp(A,B,sizeof(Scalar)*10000); 31 PetscMemcmp(A,B,sizeof(Scalar)*10000); 32 PetscMemcmp(A,B,sizeof(Scalar)*10000); 33 PetscMemcmp(A,B,sizeof(Scalar)*10000); 34 y = PetscGetTime(); 35 PetscMemcmp(A,B,sizeof(Scalar)*0); 36 PetscMemcmp(A,B,sizeof(Scalar)*0); 37 PetscMemcmp(A,B,sizeof(Scalar)*0); 38 PetscMemcmp(A,B,sizeof(Scalar)*0); 39 PetscMemcmp(A,B,sizeof(Scalar)*0); 40 PetscMemcmp(A,B,sizeof(Scalar)*0); 41 PetscMemcmp(A,B,sizeof(Scalar)*0); 42 PetscMemcmp(A,B,sizeof(Scalar)*0); 43 PetscMemcmp(A,B,sizeof(Scalar)*0); 44 PetscMemcmp(A,B,sizeof(Scalar)*0); 45 z = PetscGetTime(); 46 47 fprintf(stderr,"%s : \n","PetscMemcmp"); 48 fprintf(stderr," %-11s : %e sec\n","Latency",(z-y)/10.0); 49 fprintf(stderr," %-11s : %e sec\n","Per Scalar",(2*y-x-z)/100000); 50 51 PetscFinalize(); 52 PetscFunctionReturn(0); 53 } 54