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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <mpi.h>
#include "mpitest.h"
#include "squelch.h"
#define ITER 100
int main(int argc, char **argv)
{
int i, rank, nproc;
int errors = 0;
int *val_ptr;
MPI_Win win;
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nproc);
val_ptr = malloc(sizeof(int));
*val_ptr = 0;
MPI_Win_create(val_ptr, sizeof(int), sizeof(int), MPI_INFO_NULL, MPI_COMM_WORLD, &win);
/* Test self communication */
for (i = 0; i < ITER; i++) {
int next = i + 1, result = -1;
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, win);
MPI_Compare_and_swap(&next, &i, &result, MPI_INT, rank, 0, win);
MPI_Win_unlock(rank, win);
if (result != i) {
SQUELCH(printf("%d->%d -- Error: next=%d compare=%d result=%d val=%d\n", rank,
rank, next, i, result, *val_ptr););
errors++;
}
}
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, win);
*val_ptr = 0;
MPI_Win_unlock(rank, win);
MPI_Barrier(MPI_COMM_WORLD);
/* Test neighbor communication */
for (i = 0; i < ITER; i++) {
int next = i + 1, result = -1;
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, (rank + 1) % nproc, 0, win);
MPI_Compare_and_swap(&next, &i, &result, MPI_INT, (rank + 1) % nproc, 0, win);
MPI_Win_unlock((rank + 1) % nproc, win);
if (result != i) {
SQUELCH(printf("%d->%d -- Error: next=%d compare=%d result=%d val=%d\n", rank,
(rank + 1) % nproc, next, i, result, *val_ptr););
errors++;
}
}
fflush(NULL);
MPI_Barrier(MPI_COMM_WORLD);
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, win);
*val_ptr = 0;
MPI_Win_unlock(rank, win);
MPI_Barrier(MPI_COMM_WORLD);
/* Test contention */
if (rank != 0) {
for (i = 0; i < ITER; i++) {
int next = i + 1, result = -1;
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, 0, 0, win);
MPI_Compare_and_swap(&next, &i, &result, MPI_INT, 0, 0, win);
MPI_Win_unlock(0, win);
}
}
MPI_Barrier(MPI_COMM_WORLD);
if (rank == 0 && nproc > 1) {
if (*val_ptr != ITER) {
SQUELCH(printf("%d - Error: expected=%d val=%d\n", rank, ITER, *val_ptr););
errors++;
}
}
MPI_Win_free(&win);
free(val_ptr);
MTest_Finalize(errors);
return MTestReturnValue(errors);
}
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