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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpitest.h"
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mtest_dtp.h"
/*
static char MTEST_Descrip[] = "Test MPI_Allreduce with MPI_IN_PLACE";
*/
static void set_buf(int rank, int count, int *buf)
{
int i;
for (i = 0; i < count; i++) {
int val = rank + i;
buf[i] = val;
}
}
static void check_buf(int size, int count, int *errs, int *buf)
{
int i;
for (i = 0; i < count; i++) {
int result = i * size + (size * (size - 1)) / 2;
if (buf[i] != result) {
(*errs)++;
if ((*errs) < 10) {
fprintf(stderr, "buf[%d] = %d expected %d\n", i, buf[i], result);
}
}
}
}
static int test_allred(mtest_mem_type_e oddmem, mtest_mem_type_e evenmem)
{
int errs = 0;
int rank, size;
int minsize = 2, count;
MPI_Comm comm;
void *buf_h, *buf;
mtest_mem_type_e memtype;
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (rank % 2 == 0)
memtype = evenmem;
else
memtype = oddmem;
while (MTestGetIntracommGeneral(&comm, minsize, 1)) {
if (comm == MPI_COMM_NULL)
continue;
MPI_Comm_size(comm, &size);
MPI_Comm_rank(comm, &rank);
MTestMalloc(32768 * sizeof(int), memtype, &buf_h, &buf, rank);
for (count = 1; count < 65000; count = count * 8) {
set_buf(rank, count, buf_h);
MTestCopyContent(buf_h, buf, count * sizeof(int), memtype);
MPI_Allreduce(MPI_IN_PLACE, buf, count, MPI_INT, MPI_SUM, comm);
MTestCopyContent(buf, buf_h, count * sizeof(int), memtype);
check_buf(size, count, &errs, buf_h);
}
MTestFree(memtype, buf_h, buf);
MTestFreeComm(&comm);
}
return errs;
}
int main(int argc, char *argv[])
{
int errs = 0;
MTest_Init(&argc, &argv);
struct dtp_args dtp_args;
dtp_args_init(&dtp_args, MTEST_COLL_NOCOUNT, argc, argv);
while (dtp_args_get_next(&dtp_args)) {
errs += test_allred(dtp_args.u.coll.evenmem, dtp_args.u.coll.oddmem);
}
dtp_args_finalize(&dtp_args);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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