1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/* test MPI_WIN_ALLOCATE_SHARED when size of total shared memory region is 0. */
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
int main(int argc, char **argv)
{
MPI_Win win;
void *win_buf = NULL;
int world_rank, shm_rank;
MPI_Comm shm_comm;
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
MPI_Comm_split_type(MPI_COMM_WORLD, MPI_COMM_TYPE_SHARED, world_rank, MPI_INFO_NULL, &shm_comm);
MPI_Comm_rank(shm_comm, &shm_rank);
/* Some ranks allocate zero bytes */
if (shm_rank % 2 == 0)
MPI_Win_allocate_shared(0, sizeof(char), MPI_INFO_NULL, shm_comm, &win_buf, &win);
else
MPI_Win_allocate_shared(1, sizeof(char), MPI_INFO_NULL, shm_comm, &win_buf, &win);
MPI_Win_free(&win);
if (world_rank % 2 == 0)
MPI_Win_allocate(0, sizeof(char), MPI_INFO_NULL, MPI_COMM_WORLD, &win_buf, &win);
else
MPI_Win_allocate(1, sizeof(char), MPI_INFO_NULL, MPI_COMM_WORLD, &win_buf, &win);
MPI_Win_free(&win);
win_buf = NULL;
if (world_rank % 2 == 0)
MPI_Win_create(NULL, 0, sizeof(char), MPI_INFO_NULL, MPI_COMM_WORLD, &win);
else {
win_buf = (void *) malloc(sizeof(char));
MPI_Win_create(win_buf, 1, sizeof(char), MPI_INFO_NULL, MPI_COMM_WORLD, &win);
}
MPI_Win_free(&win);
if (win_buf)
free(win_buf);
/* All ranks allocate zero bytes */
MPI_Win_allocate_shared(0, sizeof(char), MPI_INFO_NULL, shm_comm, &win_buf, &win);
MPI_Win_free(&win);
MPI_Win_allocate(0, sizeof(char), MPI_INFO_NULL, MPI_COMM_WORLD, &win_buf, &win);
MPI_Win_free(&win);
MPI_Win_create(NULL, 0, sizeof(char), MPI_INFO_NULL, MPI_COMM_WORLD, &win);
MPI_Win_free(&win);
MPI_Comm_free(&shm_comm);
MTest_Finalize(0);
return 0;
}
|
