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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/* test MPI_WIN_ALLOCATE and MPI_WIN_ALLOCATE_SHARED when allocating
SHM memory with size of 1GB per process */
#include "mpi.h"
#include <stdlib.h>
#include <stdio.h>
#include "mpitest.h"
int main(int argc, char **argv)
{
int my_rank, shared_rank;
void *mybase = NULL;
MPI_Win win;
MPI_Info win_info;
MPI_Comm shared_comm;
int i;
int shm_win_size = 1024 * 1024 * 1024 * sizeof(char); /* 1GB */
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
for (i = 0; i < 2; i++) {
if (i == 0) {
MPI_Info_create(&win_info);
MPI_Info_set(win_info, (char *) "alloc_shm", (char *) "true");
} else {
win_info = MPI_INFO_NULL;
}
MPI_Comm_split_type(MPI_COMM_WORLD, MPI_COMM_TYPE_SHARED, my_rank, MPI_INFO_NULL,
&shared_comm);
MPI_Comm_rank(shared_comm, &shared_rank);
/* every processes allocate 1GB window memory */
MPI_Win_allocate(shm_win_size, sizeof(char), win_info, MPI_COMM_WORLD, &mybase, &win);
MPI_Win_free(&win);
MPI_Win_allocate_shared(shm_win_size, sizeof(char), win_info, shared_comm, &mybase, &win);
MPI_Win_free(&win);
/* some processes allocate 1GB and some processes allocate zero bytes */
if (my_rank % 2 == 0)
MPI_Win_allocate(shm_win_size, sizeof(char), win_info, MPI_COMM_WORLD, &mybase, &win);
else
MPI_Win_allocate(0, sizeof(char), win_info, MPI_COMM_WORLD, &mybase, &win);
MPI_Win_free(&win);
if (shared_rank % 2 == 0)
MPI_Win_allocate_shared(shm_win_size, sizeof(char), win_info, shared_comm, &mybase,
&win);
else
MPI_Win_allocate_shared(0, sizeof(char), win_info, shared_comm, &mybase, &win);
MPI_Win_free(&win);
/* some processes allocate 1GB and some processes allocate smaller bytes */
if (my_rank % 2 == 0)
MPI_Win_allocate(shm_win_size, sizeof(char), win_info, MPI_COMM_WORLD, &mybase, &win);
else
MPI_Win_allocate(shm_win_size / 2, sizeof(char), win_info, MPI_COMM_WORLD, &mybase,
&win);
MPI_Win_free(&win);
/* some processes allocate 1GB and some processes allocate smaller bytes */
if (shared_rank % 2 == 0)
MPI_Win_allocate_shared(shm_win_size, sizeof(char), win_info, shared_comm, &mybase,
&win);
else
MPI_Win_allocate_shared(shm_win_size / 2, sizeof(char), win_info, shared_comm, &mybase,
&win);
MPI_Win_free(&win);
MPI_Comm_free(&shared_comm);
if (i == 0)
MPI_Info_free(&win_info);
}
MTest_Finalize(0);
return 0;
}
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