1*4a2ae208SSatish Balay /*$Id: PetscMemzero.c,v 1.18 2001/01/23 20:58:37 balay Exp balay $*/ 2d8e9fea7SSatish Balay 3b0878937SSatish Balay #include "petsc.h" 4b0878937SSatish Balay 5*4a2ae208SSatish Balay #undef __FUNCT__ 6*4a2ae208SSatish 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 */ 15ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 16ac355199SBarry Smith ierr = PetscGetTime(&x);CHKERRQ(ierr); 17b0878937SSatish Balay 18ac355199SBarry Smith ierr = PetscGetTime(&x);CHKERRQ(ierr); 19ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 20ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 21ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 22ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 23ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 24ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 25ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 26ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 27ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr); 28ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*10000);CHKERRQ(ierr);, 29ac355199SBarry Smith ierr = PetscGetTime(&y);CHKERRQ(ierr); 30ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 31ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 32ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 33ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 34ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 35ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 36ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 37ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 38ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*0);CHKERRQ(ierr); 39ac355199SBarry Smith ierr = PetscMemzero(A,sizeof(Scalar)*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