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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2020 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2010-2012 Oak Ridge National Labs. All rights reserved.
* Copyright (c) 2013 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/datatype/ompi_datatype.h"
#include "ompi/op/op.h"
#include "ompi/memchecker.h"
#include "ompi/runtime/ompi_spc.h"
#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Allreduce = PMPI_Allreduce
#endif
#define MPI_Allreduce PMPI_Allreduce
#endif
static const char FUNC_NAME[] = "MPI_Allreduce";
int MPI_Allreduce(const void *sendbuf, void *recvbuf, int count,
MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
{
int err;
SPC_RECORD(OMPI_SPC_ALLREDUCE, 1);
MEMCHECKER(
memchecker_datatype(datatype);
memchecker_comm(comm);
/* check whether receive buffer is defined. */
memchecker_call(&opal_memchecker_base_isaddressable, recvbuf, count, datatype);
/* check whether the actual send buffer is defined. */
if (MPI_IN_PLACE == sendbuf) {
memchecker_call(&opal_memchecker_base_isdefined, recvbuf, count, datatype);
} else {
memchecker_call(&opal_memchecker_base_isdefined, sendbuf, count, datatype);
}
);
if (MPI_PARAM_CHECK) {
char *msg;
/* Unrooted operation -- same checks for all ranks on both
intracommunicators and intercommunicators */
err = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (ompi_comm_invalid(comm)) {
return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_COMM,
FUNC_NAME);
} else if (MPI_OP_NULL == op) {
err = MPI_ERR_OP;
} else if (!ompi_op_is_valid(op, datatype, &msg, FUNC_NAME)) {
int ret = OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_OP, msg);
free(msg);
return ret;
} else if ((MPI_IN_PLACE == sendbuf && OMPI_COMM_IS_INTER(comm)) ||
MPI_IN_PLACE == recvbuf ) {
return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_BUFFER,
FUNC_NAME);
} else if( (sendbuf == recvbuf) &&
(MPI_BOTTOM != sendbuf) &&
(count > 1) ) {
return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_BUFFER,
FUNC_NAME);
} else {
OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
}
OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
}
#if OPAL_ENABLE_FT_MPI
/*
* An early check, so as to return early if we are using a broken
* communicator. This is not absolutely necessary since we will
* check for this, and other, error conditions during the operation.
*/
if( OPAL_UNLIKELY(!ompi_comm_iface_coll_check(comm, &err)) ) {
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
}
#endif
/* MPI-1, p114, says that each process must supply at least
one element. But at least the Pallas benchmarks call
MPI_REDUCE with a count of 0. So be sure to handle it. */
if (0 == count) {
return MPI_SUCCESS;
}
/* Invoke the coll component to perform the back-end operation */
OBJ_RETAIN(op);
err = comm->c_coll->coll_allreduce(sendbuf, recvbuf, count,
datatype, op, comm,
comm->c_coll->coll_allreduce_module);
OBJ_RELEASE(op);
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
}
|
