1a5eb4965SSatish Balay #ifdef PETSC_RCS_HEADER 2*3a40ed3dSBarry Smith static char vcid[] = "$Id: PetscMemzero.c,v 1.8 1997/07/09 21:01:29 balay Exp bsmith $"; 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; 107fb9f68cSSatish Balay Scalar A[10000]; 11b0878937SSatish Balay 1277c4ece6SBarry Smith PetscInitialize(&argc, &argv,0,0); 13b0878937SSatish Balay /* To take care of paging effects */ 147fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 15b0878937SSatish Balay x = PetscGetTime(); 16b0878937SSatish Balay 17b0878937SSatish Balay x = PetscGetTime(); 187fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 197fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 207fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 217fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 227fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 237fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 247fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 257fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 267fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 277fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*10000); 28b0878937SSatish Balay y = PetscGetTime(); 297fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 307fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 317fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 327fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 337fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 347fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 357fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 367fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 377fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 387fb9f68cSSatish Balay PetscMemzero(A,sizeof(Scalar)*0); 39b0878937SSatish Balay z = PetscGetTime(); 40b0878937SSatish Balay 41b0878937SSatish Balay fprintf(stderr,"%s : \n","PetscMemzero"); 42b0878937SSatish Balay fprintf(stderr," %-11s : %e sec\n","Latency",(z-y)/10.0); 4377c4ece6SBarry Smith fprintf(stderr," %-11s : %e sec\n","Per Scalar",(2*y-x-z)/100000.0); 44b0878937SSatish Balay 45b0878937SSatish Balay PetscFinalize(); 46*3a40ed3dSBarry Smith PetscFunctionReturn(0); 47b0878937SSatish Balay } 48