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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include "mpitest.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/*
Basic test for collective large APIs.
It is only intended to test the API interface rather than stress testing the internals.
*/
#define MAX_SIZE 1024
#define MAX_PROC 20
MPI_Comm comm;
int rank, nprocs;
int errs;
int sendbuf[MAX_SIZE];
int recvbuf[MAX_SIZE];
static void init_buf(void)
{
for (int i = 0; i < MAX_SIZE; i++) {
sendbuf[i] = i;
}
for (int i = 0; i < MAX_SIZE; i++) {
recvbuf[i] = -1;
}
}
static void test_alltoallv(void)
{
MPI_Count counts[MAX_PROC];
MPI_Aint displs[MAX_PROC];
for (int i = 0; i < nprocs; i++) {
counts[i] = 1;
}
for (int i = 0; i < nprocs; i++) {
displs[i] = i * 3;
}
init_buf();
MPI_Alltoallv_c(sendbuf, counts, displs, MPI_INT, recvbuf, counts, displs, MPI_INT, comm);
/* check results */
for (int i = 0; i < nprocs; i++) {
if (recvbuf[displs[i]] != rank * 3) {
errs++;
}
}
}
int main(int argc, char **argv)
{
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
MPI_Comm_size(comm, &nprocs);
MPI_Comm_rank(comm, &rank);
test_alltoallv();
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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