Actual source code: MPI_Wtime.c
petsc-3.9.4 2018-09-11
2: #include <petscsys.h>
4: int main(int argc,char **argv)
5: {
6: double x,y;
7: int ierr;
9: PetscInitialize(&argc,&argv,0,0);if (ierr) return ierr;
10: /* To take care of paging effects */
11: y = MPI_Wtime();
13: x = MPI_Wtime();
14: y = MPI_Wtime();
15: y = MPI_Wtime();
16: y = MPI_Wtime();
17: y = MPI_Wtime();
18: y = MPI_Wtime();
19: y = MPI_Wtime();
20: y = MPI_Wtime();
21: y = MPI_Wtime();
22: y = MPI_Wtime();
23: y = MPI_Wtime();
25: fprintf(stdout,"%-15s : %e sec\n","MPI_Wtime",(y-x)/10.0);
26: y = MPI_Wtick();
27: fprintf(stdout,"%-15s : %e sec\n","MPI_Wtick",y);
29: x = MPI_Wtime();
30: PetscSleep(10);
31: y = MPI_Wtime();
32: fprintf(stdout,"%-15s : %e sec - Slept for 10 sec \n","MPI_Wtime",(y-x));
34: PetscFinalize();
35: return ierr;
36: }