Actual source code: ex12.c


  2: static char help[] = "Tests timing PetscSortInt().\n\n";

  4: #include <petscsys.h>

  6: int main(int argc,char **argv)
  7: {
  8:   PetscInt       i,n = 1000,*values;
  9: #if defined(PETSC_USE_LOG)
 10:   PetscLogEvent  event;
 11: #endif
 12:   PetscRandom    rand;
 13:   PetscReal      value;
 14:   PetscBool      values_view=PETSC_FALSE;
 15:   PetscMPIInt    rank;

 17:   PetscInitialize(&argc,&argv,(char*)0,help);
 18:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 19:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
 20:   PetscOptionsGetBool(NULL,0,"-values_view",&values_view,NULL);

 22:   PetscRandomCreate(PETSC_COMM_SELF,&rand);
 23:   PetscRandomSetFromOptions(rand);

 25:   PetscMalloc1(n,&values);
 26:   for (i=0; i<n; i++) {
 27:     PetscRandomGetValueReal(rand,&value);
 28:     values[i] = (PetscInt)(n*value + 2.0);
 29:   }
 30:   PetscSortInt(n,values);

 32:   PetscLogEventRegister("Sort",0,&event);
 33:   PetscLogEventBegin(event,0,0,0,0);

 35:   for (i=0; i<n; i++) {
 36:     PetscRandomGetValueReal(rand,&value);
 37:     values[i] = (PetscInt)(n*value + 2.0);
 38:   }
 39:   PetscSortInt(n,values);
 40:   PetscLogEventEnd(event,0,0,0,0);

 42:   for (i=1; i<n; i++) {
 44:     if (values_view && rank == 0) PetscPrintf(PETSC_COMM_SELF,"%" PetscInt_FMT " %" PetscInt_FMT "\n",i,values[i]);
 45:   }
 46:   PetscFree(values);
 47:   PetscRandomDestroy(&rand);

 49:   PetscFinalize();
 50:   return 0;
 51: }

 53: /*TEST

 55:    test:
 56:       args: -values_view

 58: TEST*/