1 #include <petscsys.h> 2 #include <petsctime.h> 3 4 int main(int argc,char **argv) 5 { 6 PetscLogDouble x,y,z; 7 PetscScalar A[10000],B[10000]; 8 PetscInt i; 9 PetscBool flg; 10 11 PetscCall(PetscInitialize(&argc,&argv,0,0)); 12 for (i=0; i<10000; i++) { 13 A[i] = i%61897; 14 B[i] = i%61897; 15 } 16 /* To take care of paging effects */ 17 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 18 PetscCall(PetscTime(&x)); 19 20 PetscCall(PetscTime(&x)); 21 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 22 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 23 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 24 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 25 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 26 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 27 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 28 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 29 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 30 PetscMemcmp(A,B,sizeof(PetscScalar)*10000,&flg); 31 PetscCall(PetscTime(&y)); 32 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 33 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 34 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 35 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 36 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 37 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 38 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 39 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 40 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 41 PetscMemcmp(A,B,sizeof(PetscScalar)*0,&flg); 42 PetscCall(PetscTime(&z)); 43 44 fprintf(stdout,"%s : \n","PetscMemcmp"); 45 fprintf(stdout," %-15s : %e sec\n","Latency",(z-y)/10.0); 46 fprintf(stdout," %-15s : %e sec\n","Per PetscScalar",(2*y-x-z)/100000); 47 48 PetscCall(PetscFinalize()); 49 return 0; 50 } 51