2 /* Creator: Bronis R. de Supinski (bronis@llnl.gov) Tue Sep 30 2003 */
3 /* any_src-can-deadlock10.c -- deadlock occurs if task 0 receives */
4 /* from task 1 first; sleeps generally */
5 /* make order 1 before 2 with all task */
6 /* 0 ops being posted before both 1 and 2 */
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");
43 MPI_Irecv (buf0, buf_size, MPI_INT,
44 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &req);
46 MPI_Recv (buf1, buf_size, MPI_INT, 2, 0, MPI_COMM_WORLD, &status);
48 MPI_Send (buf1, buf_size, MPI_INT, 2, 0, MPI_COMM_WORLD);
50 MPI_Recv (buf1, buf_size, MPI_INT,
51 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &status);
53 MPI_Wait (&req, &status);
57 memset (buf0, 0, buf_size);
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);
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);