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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdlib.h>
#include <stdio.h>
#include <mpi.h>
int main(int argc, char **argv)
{
int size;
int rank;
int *msg = NULL;
int msg_sz = 0;
int niter = 1;
int iter;
int i;
if (MPI_Init(&argc, &argv) != MPI_SUCCESS) {
printf("ERROR: problem with MPI_Init\n");
fflush(stdout);
}
if (MPI_Comm_size(MPI_COMM_WORLD, &size) != MPI_SUCCESS) {
printf("ERROR: problem with MPI_Comm_size\n");
fflush(stdout);
}
if (MPI_Comm_rank(MPI_COMM_WORLD, &rank) != MPI_SUCCESS) {
printf("ERROR: problem with MPI_Comm_rank\n");
fflush(stdout);
}
printf("sr: size %d rank %d\n", size, rank);
fflush(stdout);
if (size < 2) {
printf("ERROR: needs to be run with at least 2 procs\n");
fflush(stdout);
}
if (argc > 1) {
sscanf(argv[1], "%d", &msg_sz);
}
if (argc > 2) {
sscanf(argv[2], "%d", &niter);
}
if (rank == 0) {
printf("msg_sz=%d, niter=%d\n", msg_sz, niter);
fflush(stdout);
}
if (msg_sz > 0) {
msg = (int *) malloc(msg_sz * sizeof(int));
}
if (rank == 0) {
/* usleep(10000); */
for (iter = 0; iter < niter; iter++) {
for (i = 0; i < msg_sz; i++) {
msg[i] = iter * msg_sz + i;
}
if (MPI_Send(msg, msg_sz, MPI_INT, 1, iter, MPI_COMM_WORLD)
!= MPI_SUCCESS) {
printf("ERROR: problem with MPI_Send\n");
fflush(stdout);
}
}
} else if (rank == 1) {
MPI_Status status;
for (iter = 0; iter < niter; iter++) {
if (MPI_Recv(msg, msg_sz, MPI_INT, 0, iter, MPI_COMM_WORLD, &status) != MPI_SUCCESS) {
printf("ERROR: problem with MPI_Recv\n");
fflush(stdout);
}
for (i = 0; i < msg_sz; i++) {
if (msg[i] != iter * msg_sz + i) {
printf("ERROR: %d != %d, i=%d iter=%d\n", msg[i], iter * msg_sz + i, i, iter);
fflush(stdout);
abort();
}
}
}
printf("All messages successfully received!\n");
fflush(stdout);
}
printf("sr: process %d finished\n", rank);
fflush(stdout);
if (MPI_Finalize() != MPI_SUCCESS) {
printf("ERROR: problem with MPI_Finalize\n");
fflush(stdout);
}
return 0;
}
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