1*ac355199SBarry Smith /*$Id: PetscMemcpy.c,v 1.18 2001/01/16 18:21:52 balay Exp bsmith $*/ 2d8e9fea7SSatish Balay 3b0878937SSatish Balay #include "petsc.h" 4b0878937SSatish Balay 55a655dc6SBarry Smith #undef __FUNC__ 65a655dc6SBarry Smith #define __FUNC__ "main" 7b0878937SSatish Balay int main(int argc,char **argv) 8b0878937SSatish Balay { 9b0a32e0cSBarry Smith PetscLogDouble x,y,z; 10d3093643SSatish Balay int i,ierr; 11e24b481bSBarry Smith Scalar *A,*B; 12b0878937SSatish Balay 1377c4ece6SBarry Smith PetscInitialize(&argc,&argv,0,0); 14e24b481bSBarry Smith 15*ac355199SBarry Smith ierr = PetscMalloc(8000000*sizeof(Scalar),&A);CHKERRQ(ierr); 16*ac355199SBarry Smith ierr = PetscMalloc(8000000*sizeof(Scalar),&B);CHKERRQ(ierr); 17e24b481bSBarry Smith 18e24b481bSBarry 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 */ 23*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 24*ac355199SBarry Smith ierr = PetscGetTime(&x);CHKERRQ(ierr); 25b0878937SSatish Balay 26*ac355199SBarry Smith ierr = PetscGetTime(&x);CHKERRQ(ierr); 27e24b481bSBarry Smith /* 28e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 29e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 30e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 31e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 32e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 33e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 34e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 35e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 36e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); 37e24b481bSBarry Smith PetscMemcpy(A,B,sizeof(Scalar)*8000000); */ 38e24b481bSBarry Smith { int j; 39e24b481bSBarry Smith for (j = 0; j<10; j++) { 40e24b481bSBarry Smith for (i=0; i<8000000; i++) { 41e24b481bSBarry Smith B[i] = A[i]; 42e24b481bSBarry Smith } 43e24b481bSBarry Smith }} 44e24b481bSBarry Smith 45*ac355199SBarry Smith ierr = PetscGetTime(&y);CHKERRQ(ierr); 46*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 47*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 48*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 49*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 50*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 51*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 52*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 53*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 54*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 55*ac355199SBarry Smith ierr = PetscMemcpy(A,B,sizeof(Scalar)*0);CHKERRQ(ierr); 56*ac355199SBarry Smith ierr = PetscGetTime(&z);CHKERRQ(ierr); 57b0878937SSatish Balay 5835d8aa7fSBarry Smith fprintf(stdout,"%s : \n","PetscMemcpy"); 5935d8aa7fSBarry Smith fprintf(stdout," %-11s : %e MB/s\n","Bandwidth",10.0*8*8/(y-x)); 6035d8aa7fSBarry Smith fprintf(stdout," %-11s : %e sec\n","Latency",(z-y)/10.0); 6135d8aa7fSBarry Smith fprintf(stdout," %-11s : %e sec\n","Per Scalar",(2*y-x-z)/8000000.0); 62b0878937SSatish Balay 63b0878937SSatish Balay PetscFinalize(); 643a40ed3dSBarry Smith PetscFunctionReturn(0); 65b0878937SSatish Balay } 66