1*87828ca2SBarry Smith /*$Id: PetscMemzero.c,v 1.19 2001/03/23 23:25:45 balay Exp bsmith $*/ 2d8e9fea7SSatish Balay 3b0878937SSatish Balay #include "petsc.h" 4b0878937SSatish Balay 54a2ae208SSatish Balay #undef __FUNCT__ 64a2ae208SSatish Balay #define __FUNCT__ "main" 7b0878937SSatish Balay int main(int argc,char **argv) 8b0878937SSatish Balay { 9b0a32e0cSBarry Smith PetscLogDouble x,y,z; 107fb9f68cSSatish Balay Scalar A[10000]; 11d3093643SSatish Balay int ierr; 12b0878937SSatish Balay 1377c4ece6SBarry Smith PetscInitialize(&argc,&argv,0,0); 14b0878937SSatish Balay /* To take care of paging effects */ 15*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 16ac355199SBarry Smith ierr = PetscGetTime(&x);CHKERRQ(ierr); 17b0878937SSatish Balay 18ac355199SBarry Smith ierr = PetscGetTime(&x);CHKERRQ(ierr); 19*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 20*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 21*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 22*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 23*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 24*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 25*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 26*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 27*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr); 28*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*10000);CHKERRQ(ierr);, 29ac355199SBarry Smith ierr = PetscGetTime(&y);CHKERRQ(ierr); 30*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 31*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 32*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 33*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 34*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 35*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 36*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 37*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 38*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 39*87828ca2SBarry Smith ierr = PetscMemzero(A,sizeof(PetscScalar)*0);CHKERRQ(ierr); 40ac355199SBarry Smith ierr = PetscGetTime(&z);CHKERRQ(ierr); 41b0878937SSatish Balay 4235d8aa7fSBarry Smith fprintf(stdout,"%s : \n","PetscMemzero"); 4335d8aa7fSBarry Smith fprintf(stdout," %-11s : %e sec\n","Latency",(z-y)/10.0); 4435d8aa7fSBarry Smith fprintf(stdout," %-11s : %e sec\n","Per Scalar",(2*y-x-z)/100000.0); 45b0878937SSatish Balay 462b7fea2aSSatish Balay ierr = PetscFinalize();CHKERRQ(ierr); 473a40ed3dSBarry Smith PetscFunctionReturn(0); 48b0878937SSatish Balay } 49