2:  #include <petscvec.h>
  3:  #include <petsctime.h>

  5: int main(int argc,char **argv)
  6: {
  7:   Vec            x;
  8:   PetscReal      norm;
  9:   PetscLogDouble t1,t2;
 11:   PetscInt       n = 10000;

 13:   PetscInitialize(&argc,&argv,0,0);if (ierr) return ierr;
 14:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);

 16:   VecCreate(PETSC_COMM_SELF,&x);
 17:   VecSetSizes(x,n,n);
 18:   VecSetFromOptions(x);

 20:   PetscPreLoadBegin(PETSC_TRUE,"VecNorm");
 21:   PetscTime(&t1);
 22:   VecNorm(x,NORM_2,&norm);
 23:   VecNorm(x,NORM_2,&norm);
 24:   VecNorm(x,NORM_2,&norm);
 25:   VecNorm(x,NORM_2,&norm);
 26:   VecNorm(x,NORM_2,&norm);
 27:   VecNorm(x,NORM_2,&norm);
 28:   VecNorm(x,NORM_2,&norm);
 29:   VecNorm(x,NORM_2,&norm);
 30:   VecNorm(x,NORM_2,&norm);
 31:   VecNorm(x,NORM_2,&norm);
 32:   PetscPreLoadEnd();
 33:   PetscTime(&t2);
 34:   fprintf(stdout,"%s : \n","VecNorm");
 35:   fprintf(stdout," Time %g\n",t2-t1);
 36:   PetscFinalize();
 37:   return ierr;
 38: }