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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 allgatherv test";
*/
int main(int argc, char *argv[])
{
int errs = 0, err;
int *rbuf = 0, *sbuf = 0;
int *recvcounts, *recvdispls;
int leftGroup, i, count, rank, rsize;
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);
MPI_Comm_remote_size(comm, &rsize);
/* 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) {
/* The left group will send rank to the right group;
* The right group will send -rank to the left group */
rbuf = (int *) malloc(count * rsize * sizeof(int));
sbuf = (int *) malloc(count * sizeof(int));
recvcounts = (int *) malloc(rsize * sizeof(int));
recvdispls = (int *) malloc(rsize * sizeof(int));
for (i = 0; i < count * rsize; i++)
rbuf[i] = -1;
for (i = 0; i < rsize; i++) {
recvcounts[i] = count;
recvdispls[i] = i * count;
}
if (leftGroup) {
for (i = 0; i < count; i++)
sbuf[i] = i + rank * count;
} else {
for (i = 0; i < count; i++)
sbuf[i] = -(i + rank * count);
}
err = MTest_Allgatherv(sbuf, count, datatype,
rbuf, recvcounts, recvdispls, datatype, comm);
if (err) {
errs++;
MTestPrintError(err);
}
if (leftGroup) {
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != -i) {
errs++;
}
}
} else {
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != i) {
errs++;
}
}
}
/* Use Allgather in a unidirectional way */
for (i = 0; i < count * rsize; i++)
rbuf[i] = -1;
if (leftGroup) {
err = MTest_Allgatherv(sbuf, 0, datatype,
rbuf, recvcounts, recvdispls, datatype, comm);
if (err) {
errs++;
MTestPrintError(err);
}
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != -i) {
errs++;
}
}
} else {
for (i = 0; i < rsize; i++) {
recvcounts[i] = 0;
recvdispls[i] = 0;
}
err = MTest_Allgatherv(sbuf, count, datatype,
rbuf, recvcounts, recvdispls, datatype, comm);
if (err) {
errs++;
MTestPrintError(err);
}
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != -1) {
errs++;
}
}
}
free(rbuf);
free(sbuf);
free(recvcounts);
free(recvdispls);
}
MTestFreeComm(&comm);
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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