1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
3 * (C) 2001 by Argonne National Laboratory.
4 * See COPYRIGHT in top-level directory.
11 int main(int argc, char *argv[])
15 int buf[BUFSIZE], *bptr, bl, i, j, rank, size;
19 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
20 MPI_Comm_size(MPI_COMM_WORLD, &size);
21 MPI_Buffer_attach(buf, BUFSIZE);
23 for (j = 0; j < 10; j++) {
24 for (i = 0; i < 10; i++) {
25 a[i] = (rank + 10 * j) * size + i;
27 MPI_Bsend(a, 10, MPI_INT, 0, 27 + j, MPI_COMM_WORLD);
31 for (i = 0; i < size; i++) {
32 for (j = 0; j < 10; j++) {
35 status.MPI_SOURCE = -20;
36 MPI_Recv(b, 10, MPI_INT, i, 27 + j, MPI_COMM_WORLD, &status);
38 if (status.MPI_TAG != 27 + j) {
40 printf("Wrong tag = %d\n", status.MPI_TAG);
42 if (status.MPI_SOURCE != i) {
44 printf("Wrong source = %d\n", status.MPI_SOURCE);
46 for (k = 0; k < 10; k++) {
47 if (b[k] != (i + 10 * j) * size + k) {
49 printf("received b[%d] = %d from %d tag %d\n", k, b[k], i, 27 + j);
55 MPI_Buffer_detach(&bptr, &bl);