2 * Test for null proc handling with non-blocking routines
9 #if defined(NEEDS_STDLIB_PROTOTYPES)
13 int main( int argc, char *argv[] )
17 int rank, right, left;
20 int index, it, count, errcnt = 0;
23 MPI_Init(&argc, &argv);
24 MPI_Comm_size(MPI_COMM_WORLD, &nproc);
25 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
27 /* set up processor chain (Apps should use Cart_create/shift) */
28 left = (rank == 0) ? MPI_PROC_NULL : rank - 1;
29 right = (rank == nproc - 1) ? MPI_PROC_NULL : rank + 1;
31 /* initialize local matrix */
32 /* globally: a[i] = i, i = 1 .. 2*nproc */
33 /* locally : a[i] = 2*rank+i, i=1,2 */
39 /* start all receives and sends */
40 MPI_Irecv(&a[0], 1, MPI_INT, left, 1, MPI_COMM_WORLD, &req[0]);
41 MPI_Irecv(&a[3], 1, MPI_INT, right, 0, MPI_COMM_WORLD, &req[3]);
42 MPI_Isend(&a[1], 1, MPI_INT, left, 0, MPI_COMM_WORLD, &req[1]);
43 MPI_Isend(&a[2], 1, MPI_INT, right, 1, MPI_COMM_WORLD, &req[2]);
45 for (it=0; it<4; it++) {
46 status.MPI_SOURCE = nproc;
47 status.MPI_TAG = nproc;
48 MPI_Waitany( 4, req, &index, &status );
49 if (index == 0 && left == MPI_PROC_NULL) {
50 if (status.MPI_TAG != MPI_ANY_TAG ||
51 status.MPI_SOURCE != MPI_PROC_NULL) {
53 fprintf( stderr, "Incorrect null status for left\n" );
55 MPI_Get_count( &status, MPI_INT, &count );
58 fprintf( stderr, "Incorrect null status for left (count)\n" );
61 else if (index == 3 && right == MPI_PROC_NULL) {
62 if (status.MPI_TAG != MPI_ANY_TAG ||
63 status.MPI_SOURCE != MPI_PROC_NULL) {
65 fprintf( stderr, "Incorrect null status for right\n" );
67 MPI_Get_count( &status, MPI_INT, &count );
70 fprintf( stderr, "Incorrect null status for right (count)\n" );
76 if (left == MPI_PROC_NULL) {
78 fprintf( stderr, "Expected -1, found %d in left partner\n", a[0] );
83 if (a[0] != 2 * left + 2) {
84 fprintf( stderr, "Expected %d, found %d in left partner\n",
90 if (right == MPI_PROC_NULL) {
92 fprintf( stderr, "Expected -1, found %d in right partner\n", a[3] );
97 if (a[3] != 2 * right + 1) {
98 fprintf( stderr, "Expected %d, found %d in right partner\n",
99 2 * right + 1, a[3] );
106 MPI_Allreduce( &i, &errcnt, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );
109 printf( "Found %d errors in the run \n", errcnt );
112 printf( "No errors in handling MPI_PROC_NULL\n" );