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
|
/* -*- Mode: C++; c-basic-offset:4 ; -*- */
/*
* (C) 2003 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpi.h"
#include <iostream>
#include "mpitestconf.h"
#include "mpitestcxx.h"
static char MTEST_Descrip[] = "Simple intercomm allgather test";
int main(int argc, char *argv[])
{
int errs = 0;
int *rbuf = 0, *sbuf = 0;
int leftGroup, i, count, rank, rsize;
MPI::Intercomm comm;
MPI::Datatype datatype;
MTest_Init();
datatype = MPI_INT;
while (MTestGetIntercomm(comm, leftGroup, 4)) {
if (comm == MPI::COMM_NULL)
continue;
for (count = 1; count < 65000; count = 2 * count) {
/* Get an intercommunicator */
/* The left group will send rank to the right group;
* The right group will send -rank to the left group */
rank = comm.Get_rank();
rsize = comm.Get_remote_size();
rbuf = new int[count * rsize];
sbuf = new int[count];
for (i = 0; i < count * rsize; i++)
rbuf[i] = -1;
if (leftGroup) {
for (i = 0; i < count; i++)
sbuf[i] = i + rank * count;
} else {
for (i = 0; i < count; i++)
sbuf[i] = -(i + rank * count);
}
try {
comm.Allgather(sbuf, count, datatype, rbuf, count, datatype);
}
catch(MPI::Exception e) {
errs++;
MTestPrintError(e.Get_error_code());
}
if (leftGroup) {
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != -i) {
errs++;
}
}
} else {
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != i) {
errs++;
}
}
}
/* Use Allgather in a unidirectional way */
for (i = 0; i < count * rsize; i++)
rbuf[i] = -1;
if (leftGroup) {
try {
comm.Allgather(sbuf, 0, datatype, rbuf, count, datatype);
}
catch(MPI::Exception e) {
errs++;
MTestPrintError(e.Get_error_code());
}
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != -i) {
errs++;
}
}
} else {
try {
comm.Allgather(sbuf, count, datatype, rbuf, 0, datatype);
}
catch(MPI::Exception e) {
errs++;
MTestPrintError(e.Get_error_code());
}
for (i = 0; i < count * rsize; i++) {
if (rbuf[i] != -1) {
errs++;
}
}
}
delete[]rbuf;
delete[]sbuf;
}
MTestFreeComm(comm);
}
MTest_Finalize(errs);
return 0;
}
|
