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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <iostream>
#include "mpitestconf.h"
#include "mpitestcxx.h"
static char MTEST_Descrip[] = "Simple intercomm allgatherv test";
int main(int argc, char *argv[])
{
int errs = 0;
int *rbuf = 0, *sbuf = 0;
int *recvcounts, *recvdispls;
int leftGroup, i, count, rank, rsize;
MPI::Intercomm comm;
MPI::Datatype datatype;
MTest_Init();
datatype = MPI::INT;
while (MTestGetIntercomm(comm, leftGroup, 4)) {
if (comm == MPI::COMM_NULL)
continue;
for (count = 1; count < 65000; count = 2 * count) {
/* Get an intercommunicator */
/* The left group will send rank to the right group;
* The right group will send -rank to the left group */
rank = comm.Get_rank();
rsize = comm.Get_remote_size();
rbuf = new int[count * rsize];
sbuf = new int[count];
recvcounts = new int[rsize];
recvdispls = new int[rsize];
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);
}
try {
comm.Allgatherv(sbuf, count, datatype, rbuf, recvcounts, recvdispls, datatype);
}
catch(MPI::Exception e) {
errs++;
MTestPrintError(e.Get_error_code());
}
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) {
try {
comm.Allgatherv(sbuf, 0, datatype, rbuf, recvcounts, recvdispls, datatype);
}
catch(MPI::Exception e) {
errs++;
MTestPrintError(e.Get_error_code());
}
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;
}
try {
comm.Allgatherv(sbuf, count, datatype, rbuf, recvcounts, recvdispls, datatype);
}
catch(MPI::Exception e) {
errs++;
MTestPrintError(e.Get_error_code());
}
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != -1) {
errs++;
}
}
}
delete[]rbuf;
delete[]sbuf;
delete[]recvcounts;
delete[]recvdispls;
}
MTestFreeComm(comm);
}
MTest_Finalize(errs);
return 0;
}
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