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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 alltoall test";
*/
int main(int argc, char *argv[])
{
int errs = 0, err;
int *sendbuf = 0, *recvbuf = 0;
int leftGroup, i, j, idx, count, rrank, rsize;
MPI_Comm comm;
MPI_Datatype datatype;
MTest_Init(&argc, &argv);
datatype = MPI_INT;
while (MTestGetIntercomm(&comm, &leftGroup, 4)) {
if (comm == MPI_COMM_NULL)
continue;
for (count = 1; count < 66000; count = 2 * count) {
/* Get an intercommunicator */
MPI_Comm_remote_size(comm, &rsize);
MPI_Comm_rank(comm, &rrank);
sendbuf = (int *) malloc(rsize * count * sizeof(int));
recvbuf = (int *) malloc(rsize * count * sizeof(int));
for (i = 0; i < rsize * count; i++)
recvbuf[i] = -1;
if (leftGroup) {
idx = 0;
for (j = 0; j < rsize; j++) {
for (i = 0; i < count; i++) {
sendbuf[idx++] = i + rrank;
}
}
err = MTest_Alltoall(sendbuf, count, datatype, NULL, 0, datatype, comm);
if (err) {
errs++;
MTestPrintError(err);
}
} else {
int rank, size;
MPI_Comm_rank(comm, &rank);
MPI_Comm_size(comm, &size);
/* In the right group */
err = MTest_Alltoall(NULL, 0, datatype, recvbuf, count, datatype, comm);
if (err) {
errs++;
MTestPrintError(err);
}
/* Check that we have received the correct data */
idx = 0;
for (j = 0; j < rsize; j++) {
for (i = 0; i < count; i++) {
if (recvbuf[idx++] != i + j) {
errs++;
if (errs < 10)
fprintf(stderr, "buf[%d] = %d on %d\n", i, recvbuf[i], rank);
}
}
}
}
free(recvbuf);
free(sendbuf);
}
MTestFreeComm(&comm);
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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