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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
#include "mpicolltest.h"
/*
static char MTEST_Descrip[] = "Simple intercomm broadcast test";
*/
int main(int argc, char *argv[])
{
int errs = 0, err;
int *buf = 0;
int leftGroup, i, count, rank;
MPI_Comm comm;
MPI_Datatype datatype;
MTest_Init(&argc, &argv);
datatype = MPI_INT;
/* Get an intercommunicator */
while (MTestGetIntercomm(&comm, &leftGroup, 4)) {
if (comm == MPI_COMM_NULL)
continue;
MPI_Comm_rank(comm, &rank);
/* To improve reporting of problems about operations, we
* change the error handler to errors return */
MPI_Comm_set_errhandler(comm, MPI_ERRORS_RETURN);
for (count = 1; count < 65000; count = 2 * count) {
buf = (int *) malloc(count * sizeof(int));
if (leftGroup) {
if (rank == 0) {
for (i = 0; i < count; i++)
buf[i] = i;
} else {
for (i = 0; i < count; i++)
buf[i] = -1;
}
err = MTest_Bcast(buf, count, datatype,
(rank == 0) ? MPI_ROOT : MPI_PROC_NULL, comm);
if (err) {
errs++;
MTestPrintError(err);
}
/* Test that no other process in this group received the
* broadcast */
if (rank != 0) {
for (i = 0; i < count; i++) {
if (buf[i] != -1) {
errs++;
}
}
}
} else {
/* In the right group */
for (i = 0; i < count; i++)
buf[i] = -1;
err = MTest_Bcast(buf, count, datatype, 0, comm);
if (err) {
errs++;
MTestPrintError(err);
}
/* Check that we have received the correct data */
for (i = 0; i < count; i++) {
if (buf[i] != i) {
errs++;
}
}
}
free(buf);
}
MTestFreeComm(&comm);
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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