2 /* Creator: Bronis R. de Supinski (bronis@llnl.gov) Fri Mar 17 2000 */
3 /* no-error2.c -- do some MPI calls without any errors */
4 /* unlike no-error.c, this uses a raing and calls MPI_Barrier... */
12 main (int argc, char **argv)
17 char processor_name[128];
24 MPI_Init (&argc, &argv);
25 MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
26 MPI_Comm_rank (MPI_COMM_WORLD, &rank);
27 MPI_Get_processor_name (processor_name, &namelen);
28 printf ("(%d) is alive on %s\n", rank, processor_name);
31 src = (rank + 1) % nprocs;
32 dest = (rank - 1 + nprocs) % nprocs;
34 memset (buf0, 0, buf_size*sizeof(int));
36 MPI_Sendrecv (buf0, buf_size, MPI_INT, dest, 0,
37 buf1, buf_size, MPI_INT, src, 0, MPI_COMM_WORLD, &status);
39 memset (buf1, 1, buf_size*sizeof(int));
41 MPI_Sendrecv (buf1, buf_size, MPI_INT, src, 0,
42 buf0, buf_size, MPI_INT, dest, 0, MPI_COMM_WORLD, &status);
44 memset (buf0, 0, buf_size*sizeof(int));
46 MPI_Sendrecv (buf0, buf_size, MPI_INT, dest, 0,
47 buf1, buf_size, MPI_INT, src, 0, MPI_COMM_WORLD, &status);
49 MPI_Barrier (MPI_COMM_WORLD);
52 printf ("(%d) Finished normally\n", rank);