2 /* Creator: Bronis R. de Supinski (bronis@llnl.gov) Tue Aug 26 2003 */
3 /* any_src-can-deadlock9.c -- deadlock occurs if task 0 receives */
4 /* from task 2 first; sleeps generally */
5 /* make order 2 before 1 with all task */
6 /* 0 ops being posted after both 1 and 2 */
7 /* same as any_src-can-deadlock5.c */
8 /* except tasks 1 and 2 are interchanged */
16 main (int argc, char **argv)
20 char processor_name[128];
28 MPI_Init (&argc, &argv);
29 MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
30 MPI_Comm_rank (MPI_COMM_WORLD, &rank);
31 MPI_Get_processor_name (processor_name, &namelen);
32 printf ("(%d) is alive on %s\n", rank, processor_name);
35 MPI_Barrier (MPI_COMM_WORLD);
39 printf ("not enough tasks\n");
45 MPI_Irecv (buf0, buf_size, MPI_INT,
46 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &req);
48 MPI_Recv (buf1, buf_size, MPI_INT, 2, 0, MPI_COMM_WORLD, &status);
50 MPI_Send (buf1, buf_size, MPI_INT, 2, 0, MPI_COMM_WORLD);
52 MPI_Recv (buf1, buf_size, MPI_INT,
53 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &status);
55 MPI_Wait (&req, &status);
59 memset (buf0, 0, buf_size*sizeof(int));
61 MPI_Send (buf0, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
63 MPI_Recv (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD, &status);
65 MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
69 memset (buf1, 1, buf_size*sizeof(int));
73 MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
76 MPI_Barrier (MPI_COMM_WORLD);
79 printf ("(%d) Finished normally\n", rank);