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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/* This test is going to test the atomicity for "read-modify-write" in FOP
* operations */
/* There are three processes involved in this test: P0 (origin_shm), P1 (origin_am),
* and P2 (dest). P0 and P1 issues multiple FOP with MPI_SUM and integer (value 1)
* to P2 via SHM and AM respectively. The correct results should be that the
* results on P0 and P1 never be the same. */
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"
#define AM_BUF_SIZE 10
#define SHM_BUF_SIZE 1000
#define WIN_BUF_SIZE 1
#define LOOP_SIZE 15
#define CHECK_TAG 123
int main(int argc, char *argv[])
{
int rank, size, i, j, k;
int errors = 0;
int origin_shm, origin_am, dest;
int my_buf_size = 0; /* to avoid warnings */
int *orig_buf = NULL, *result_buf = NULL, *target_buf = NULL, *check_buf = NULL;
MPI_Win win;
MPI_Status status;
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size != 3) {
/* run this test with three processes */
goto exit_test;
}
/* this works when MPIR_PARAM_CH3_ODD_EVEN_CLIQUES is set */
dest = 2;
origin_shm = 0;
origin_am = 1;
if (rank == origin_am)
my_buf_size = AM_BUF_SIZE;
else if (rank == origin_shm)
my_buf_size = SHM_BUF_SIZE;
if (rank != dest) {
MPI_Alloc_mem(sizeof(int) * my_buf_size, MPI_INFO_NULL, &orig_buf);
MPI_Alloc_mem(sizeof(int) * my_buf_size, MPI_INFO_NULL, &result_buf);
}
MPI_Win_allocate(sizeof(int) * WIN_BUF_SIZE, sizeof(int), MPI_INFO_NULL,
MPI_COMM_WORLD, &target_buf, &win);
for (k = 0; k < LOOP_SIZE; k++) {
/* init buffers */
if (rank != dest) {
for (i = 0; i < my_buf_size; i++) {
orig_buf[i] = 1;
result_buf[i] = 0;
}
} else {
MPI_Win_lock(MPI_LOCK_SHARED, rank, 0, win);
for (i = 0; i < WIN_BUF_SIZE; i++) {
target_buf[i] = 0;
}
MPI_Win_unlock(rank, win);
}
MPI_Barrier(MPI_COMM_WORLD);
/* perform FOP */
MPI_Win_lock_all(0, win);
if (rank != dest) {
for (i = 0; i < my_buf_size; i++) {
MPI_Fetch_and_op(&(orig_buf[i]), &(result_buf[i]), MPI_INT, dest, 0, MPI_SUM, win);
MPI_Win_flush(dest, win);
}
}
MPI_Win_unlock_all(win);
MPI_Barrier(MPI_COMM_WORLD);
if (rank != dest) {
/* check results on P0 and P2 (origin) */
if (rank == origin_am) {
MPI_Send(result_buf, AM_BUF_SIZE, MPI_INT, origin_shm, CHECK_TAG, MPI_COMM_WORLD);
} else if (rank == origin_shm) {
MPI_Alloc_mem(sizeof(int) * AM_BUF_SIZE, MPI_INFO_NULL, &check_buf);
MPI_Recv(check_buf, AM_BUF_SIZE, MPI_INT, origin_am, CHECK_TAG, MPI_COMM_WORLD,
&status);
for (i = 0; i < AM_BUF_SIZE; i++) {
for (j = 0; j < SHM_BUF_SIZE; j++) {
if (check_buf[i] == result_buf[j]) {
printf
("LOOP=%d, rank=%d, FOP, both check_buf[%d] and result_buf[%d] equal to %d, expected to be different. \n",
k, rank, i, j, check_buf[i]);
errors++;
}
}
}
MPI_Free_mem(check_buf);
}
} else {
MPI_Win_lock(MPI_LOCK_SHARED, rank, 0, win);
/* check results on P1 */
if (target_buf[0] != AM_BUF_SIZE + SHM_BUF_SIZE) {
printf("LOOP=%d, rank=%d, FOP, target_buf[0] = %d, expected %d. \n",
k, rank, target_buf[0], AM_BUF_SIZE + SHM_BUF_SIZE);
errors++;
}
MPI_Win_unlock(rank, win);
}
}
MPI_Win_free(&win);
if (rank == origin_am || rank == origin_shm) {
MPI_Free_mem(orig_buf);
MPI_Free_mem(result_buf);
}
exit_test:
MTest_Finalize(errors);
return MTestReturnValue(errors);
}
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