#include <petscsys.h>

int main(int argc, char **argv)
{
  double x, y;
  int    ierr;

  PetscCall(PetscInitialize(&argc, &argv, 0, 0));
  /* To take care of paging effects */
  y = MPI_Wtime();

  x = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();
  y = MPI_Wtime();

  fprintf(stdout, "%-15s : %e sec\n", "MPI_Wtime", (y - x) / 10.0);
  y = MPI_Wtick();
  fprintf(stdout, "%-15s : %e sec\n", "MPI_Wtick", y);

  x = MPI_Wtime();
  PetscCall(PetscSleep(10));
  y = MPI_Wtime();
  fprintf(stdout, "%-15s : %e sec - Slept for 10 sec \n", "MPI_Wtime", (y - x));

  PetscCall(PetscFinalize());
  return 0;
}