Actual source code: PetscVecNorm.c
petsc-3.4.2 2013-07-02

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

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

     14:   PetscInitialize(&argc,&argv,0,0);
     15:   PetscOptionsGetInt(NULL,"-n",&n,NULL);

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

     21:   PetscPreLoadBegin(PETSC_TRUE,"VecNorm");
     22:   PetscTime(&t1);
     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:   VecNorm(x,NORM_2,&norm);
     33:   PetscPreLoadEnd();
     34:   PetscTime(&t2);

     37:   fprintf(stdout,"%s : \n","VecNorm");
     38:   fprintf(stdout," Time %g\n",t2-t1);

     40:   PetscFinalize();
     41:   return(0);
     42: }