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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdlib.h>
#include <stdio.h>
#include "mpitest.h"
/* Similar test as isendirecv.c, but use MPI_Isendrecv_replace */
int errs = 0;
int elems = 20;
int rank, nproc, dest;
float *buf;
MPI_Comm comm;
MPI_Request *reqs;
static void test_sendrecv(int offset)
{
for (int i = 0; i < nproc; i++) {
for (int j = 0; j < elems; j++) {
buf[i * elems + j] = rank * 100.0 + j;
}
}
for (int i = 0; i < nproc; i++) {
int j = (i + offset) % nproc;
MPI_Isendrecv_replace(&buf[elems * j], elems, MPI_FLOAT, i, 0, j, 0, comm, &reqs[i]);
}
MPI_Waitall(nproc, reqs, MPI_STATUSES_IGNORE);
for (int i = 0; i < nproc; i++) {
for (int j = 0; j < elems; j++) {
if (buf[i * elems + j] != i * 100.0 + j) {
if (errs < 10) {
fprintf(stderr, "buf(%d, %d) mismatch, got %f, expect %f\n", i, j,
buf[i * elems + j], (float) i);
}
errs++;
}
}
}
}
/* sendrecv may use the same or different source and destination,
* offset defines the offset between them */
int main(int argc, char *argv[])
{
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
MPI_Comm_rank(comm, &rank);
MPI_Comm_size(comm, &nproc);
reqs = malloc(nproc * sizeof(MPI_Request));
buf = malloc(elems * nproc * sizeof(float));
for (int offset = 0; offset < nproc - 1; offset++) {
test_sendrecv(offset);
}
free(reqs);
free(buf);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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