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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/*
* A simple code that can be used to test the basic message passing or
* debug parts of the code. This is less a test than a way to exercise
* the primary code path for short message send-receives
*/
#include <stdio.h>
#include "mpi.h"
int main(int argc, char *argv[])
{
int myrank, size, src = 0, dest = 1, msgsize = 1;
int buf[20];
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
if (myrank == src) {
buf[0] = 0xabcd0123;
MPI_Send(buf, msgsize, MPI_INT, dest, 0, MPI_COMM_WORLD);
} else if (myrank == dest) {
buf[0] = 0xffffffff;
MPI_Recv(buf, msgsize, MPI_INT, src, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
if (buf[0] != 0xabcd0123) {
printf("Expected %x but got %x\n", 0xabcd0123, buf[0]);
fflush(stdout);
}
}
MPI_Finalize();
return 0;
}
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