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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/* This test test MPI_Comm_create_group tests calling by multiple threads
in parallel, using the same communicator but different tags */
#include <stdio.h>
#include <mpi.h>
#include "mpitest.h"
#include "mpithreadtest.h"
#define NUM_THREADS 4
#define NUM_ITER 100
#define check(X_) \
do { \
if (!(X_)) { \
printf("[%s:%d] -- Assertion failed: %s\n", __FILE__, __LINE__, #X_);\
MPI_Abort(MPI_COMM_WORLD, 1); \
} \
} while (0)
MPI_Group global_group;
int rank, size;
int verbose = 0;
static MTEST_THREAD_RETURN_TYPE test_comm_create_group(void *arg)
{
int i;
MPI_Group half_group, full_group;
int range[1][3];
MPI_Comm comm;
range[0][0] = 0;
range[0][1] = size / 2;
range[0][2] = 1;
for (i = 0; i < NUM_ITER; i++) {
MPI_Comm_group(MPI_COMM_WORLD, &full_group);
MPI_Group_range_incl(full_group, 1, range, &half_group);
/* Every thread paticipates in a distinct MPI_Comm_create_group,
* distinguished by its thread-id (used as the tag).
*/
if (verbose)
printf("%d: Thread %d - Comm_create_group %d start\n", rank, *(int *) arg, i);
if (rank <= size / 2) {
MPI_Comm_create_group(MPI_COMM_WORLD, half_group, *(int *) arg /* tag */ , &comm);
MPI_Barrier(comm);
MPI_Comm_free(&comm);
}
if (verbose)
printf("%d: Thread %d - Comm_create_group %d finish\n", rank, *(int *) arg, i);
MPI_Group_free(&half_group);
MPI_Group_free(&full_group);
/* Repeat the test, using the same group */
if (verbose)
printf("%d: Thread %d - Comm_create_group %d start\n", rank, *(int *) arg, i);
MPI_Comm_create_group(MPI_COMM_WORLD, global_group, *(int *) arg /* tag */ , &comm);
MPI_Barrier(comm);
MPI_Comm_free(&comm);
if (verbose)
printf("%d: Thread %d - Comm_create_group %d finish\n", rank, *(int *) arg, i);
}
if (verbose)
printf("%d: Thread %d - Done.\n", rank, *(int *) arg);
return NULL;
}
int main(int argc, char **argv)
{
int thread_args[NUM_THREADS];
int i, errs, provided;
MTest_Init_thread(&argc, &argv, MPI_THREAD_MULTIPLE, &provided);
check(provided == MPI_THREAD_MULTIPLE);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_group(MPI_COMM_WORLD, &global_group);
for (i = 0; i < NUM_THREADS; i++) {
thread_args[i] = i;
MTest_Start_thread(test_comm_create_group, (void *) &thread_args[i]);
}
errs = MTest_Join_threads();
MPI_Group_free(&global_group);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
|
