1a5eb4965SSatish Balay #ifdef PETSC_RCS_HEADER 2*e24b481bSBarry Smith static char vcid[] = "$Id: PetscMemcpy.c,v 1.10 1998/03/31 23:34:02 balay Exp $"; 3d8e9fea7SSatish Balay #endif 4d8e9fea7SSatish Balay 5b0878937SSatish Balay #include "petsc.h" 6b0878937SSatish Balay 7b0878937SSatish Balay int main( int argc, char **argv) 8b0878937SSatish Balay { 947794344SBarry Smith PLogDouble x, y, z; 10d3093643SSatish Balay int i,ierr; 11*e24b481bSBarry Smith Scalar *A, *B; 12b0878937SSatish Balay 1377c4ece6SBarry Smith PetscInitialize(&argc, &argv,0,0); 14*e24b481bSBarry Smith 15*e24b481bSBarry Smith A = (Scalar *) PetscMalloc(8000000*sizeof(Scalar)); 16*e24b481bSBarry Smith B = (Scalar *) PetscMalloc(8000000*sizeof(Scalar)); 17*e24b481bSBarry Smith 18*e24b481bSBarry Smith for (i=0; i<8000000; i++) { 19b0878937SSatish Balay A[i] = i%61897; 20b0878937SSatish Balay B[i] = i%61897; 21b0878937SSatish Balay } 22b0878937SSatish Balay /* To take care of paging effects */ 237fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 24d3093643SSatish Balay ierr = PetscGetTime(&x); CHKERRA(ierr); 25b0878937SSatish Balay 26d3093643SSatish Balay ierr = PetscGetTime(&x); CHKERRA(ierr); 27*e24b481bSBarry Smith /* 28*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 29*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 30*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 31*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 32*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 33*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 34*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 35*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 36*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 37*e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); */ 38*e24b481bSBarry Smith { int j; 39*e24b481bSBarry Smith for (j = 0; j<10; j++ ) { 40*e24b481bSBarry Smith for ( i=0; i<8000000; i++) { 41*e24b481bSBarry Smith B[i] = A[i]; 42*e24b481bSBarry Smith } 43*e24b481bSBarry Smith }} 44*e24b481bSBarry Smith 45d3093643SSatish Balay ierr = PetscGetTime(&y); CHKERRA(ierr); 467fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 477fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 487fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 497fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 507fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 517fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 527fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 537fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 547fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 557fb9f68cSSatish Balay PetscMemcpy(A,B,sizeof(Scalar)*0); 56d3093643SSatish Balay ierr = PetscGetTime(&z); CHKERRA(ierr); 57b0878937SSatish Balay 58b0878937SSatish Balay fprintf(stderr,"%s : \n","PetscMemcpy"); 59*e24b481bSBarry Smith fprintf(stderr," %-11s : %e MB/s\n","Bandwidth",10.0*8*8/(y-x)); 60b0878937SSatish Balay fprintf(stderr," %-11s : %e sec\n","Latency",(z-y)/10.0); 61*e24b481bSBarry Smith fprintf(stderr," %-11s : %e sec\n","Per Scalar",(2*y-x-z)/8000000.0); 62b0878937SSatish Balay 63b0878937SSatish Balay PetscFinalize(); 643a40ed3dSBarry Smith PetscFunctionReturn(0); 65b0878937SSatish Balay } 66