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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Simple test of intercommunicator send and receive";
*/
int main(int argc, char *argv[])
{
int errs = 0;
int leftGroup, buf, rank, remote_size, i;
MPI_Comm comm;
MPI_Status status;
MTest_Init(&argc, &argv);
int do_randomize;
MTestArgList *head = MTestArgListCreate(argc, argv);
do_randomize = MTestArgListGetInt_with_default(head, "randomize", 0);
MTestArgListDestroy(head);
if (do_randomize) {
MTestCommRandomize();
}
while (MTestGetIntercomm(&comm, &leftGroup, 4)) {
if (comm == MPI_COMM_NULL)
continue;
if (leftGroup) {
MPI_Comm_rank(comm, &rank);
buf = rank;
MPI_Send(&buf, 1, MPI_INT, 0, 0, comm);
} else {
MPI_Comm_remote_size(comm, &remote_size);
MPI_Comm_rank(comm, &rank);
if (rank == 0) {
for (i = 0; i < remote_size; i++) {
buf = -1;
MPI_Recv(&buf, 1, MPI_INT, i, 0, comm, &status);
if (buf != i) {
errs++;
fprintf(stderr, "buf = %d, should be %d\n", buf, i);
}
}
}
}
/* Now, reverse it and send back */
if (!leftGroup) {
MPI_Comm_rank(comm, &rank);
buf = rank;
MPI_Send(&buf, 1, MPI_INT, 0, 0, comm);
} else {
MPI_Comm_remote_size(comm, &remote_size);
MPI_Comm_rank(comm, &rank);
if (rank == 0) {
for (i = 0; i < remote_size; i++) {
buf = -1;
MPI_Recv(&buf, 1, MPI_INT, i, 0, comm, &status);
if (buf != i) {
errs++;
fprintf(stderr, "buf = %d, should be %d\n", buf, i);
}
}
}
}
MTestFreeComm(&comm);
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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