2 /* Creator: Jeffrey Vetter (j-vetter@llnl.gov) Mon Nov 1 1999 */
3 /* lost-request.c -- overwrite a request and essentially lose a synch point */
7 "$Header: /usr/gapps/asde/cvs-vault/umpire/tests/change-send-buffer.c,v 1.3 2002/07/30 21:34:42 bronis Exp $";
15 main (int argc, char **argv)
21 MPI_Comm comm = MPI_COMM_WORLD;
22 char processor_name[128];
28 MPI_Status aStatus[2];
31 MPI_Init (&argc, &argv);
32 MPI_Comm_size (comm, &nprocs);
33 MPI_Comm_rank (comm, &rank);
34 MPI_Get_processor_name (processor_name, &namelen);
35 printf ("(%d) is alive on %s\n", rank, processor_name);
37 for (i = 0; i < 128; i++)
43 MPI_Barrier(MPI_COMM_WORLD);
48 MPI_Isend (buf0, 128, MPI_INT, 1, tag1, comm, &aReq[0]);
49 MPI_Isend (buf1, 128, MPI_INT, 1, tag2, comm, &aReq[1]);
50 /* do some work here */
54 MPI_Wait (&aReq[0], &aStatus[0]);
55 MPI_Wait (&aReq[1], &aStatus[1]);
60 MPI_Irecv (buf0, 128, MPI_INT, 0, tag1, comm, &aReq[0]);
61 MPI_Irecv (buf1, 128, MPI_INT, 0, tag2, comm, &aReq[1]);
62 /* do some work here ... */
63 MPI_Wait (&aReq[0], &aStatus[0]);
64 MPI_Wait (&aReq[1], &aStatus[1]);
73 MPI_Barrier(MPI_COMM_WORLD);
75 for (i = 0; i < 128; i++)
83 MPI_Isend (buf0, 128, MPI_INT, 1, tag1, comm, &aReq[0]);
84 MPI_Isend (buf1, 128, MPI_INT, 1, tag2, comm, &aReq[1]);
85 /* do some work here */
89 MPI_Waitall (2, aReq, aStatus);
94 MPI_Irecv (buf0, 128, MPI_INT, 0, tag1, comm, &aReq[0]);
95 MPI_Irecv (buf1, 128, MPI_INT, 0, tag2, comm, &aReq[1]);
96 /* do some work here ... */
97 MPI_Waitall (2, aReq, aStatus);
106 printf ("(%d) Finished normally\n", rank);