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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 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) 2009-2010 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
/* This component basically fronts two different memory management
schemes: the Linux "ummunotify" kernel module and hooking in a
substitute ptmalloc2 allocator. Both of these mechanisms are
unified under a single component because the "memory" framework
both only allows one component to be selected, and that one
component must be compile-time linked into libopen-pal. Hence, if
we want to try to use either one of these mechanisms, we have to
have them both in a single component.
When using ptmalloc2, the goal of this component is to wholly
replace the underlying allocator with our internal ptmalloc2
allocator. See the file README-open-mpi.txt for details of how it
works.
When using ummunotify, we can probe to find out when the MMU map
has been changed (i.e., memory has been released back to the OS). */
#include "opal_config.h"
#include "opal/constants.h"
#include "opal/mca/base/mca_base_param.h"
#include "opal/mca/memory/memory.h"
#include "opal/mca/memory/base/empty.h"
#include "opal/memoryhooks/memory.h"
#include "opal/util/output.h"
#include "opal/mca/memory/linux/memory_linux.h"
#undef opal_memory_changed
#include "opal/mca/memory/linux/public.h"
static int linux_open(void);
static int linux_close(void);
static int linux_register(void);
#if MEMORY_LINUX_UMMUNOTIFY
static bool ummunotify_opened = false;
#endif
#if MEMORY_LINUX_PTMALLOC2
static bool ptmalloc2_opened = false;
#endif
opal_memory_linux_component_t mca_memory_linux_component = {
/* First, the opal_memory_base_component_2_0_0_t */
{
/* First, the mca_component_t struct containing meta
information about the component itself */
{
OPAL_MEMORY_BASE_VERSION_2_0_0,
/* Component name and version */
"linux",
OPAL_MAJOR_VERSION,
OPAL_MINOR_VERSION,
OPAL_RELEASE_VERSION,
/* Component open and close functions */
linux_open,
linux_close,
NULL,
linux_register,
},
{
/* The component is checkpoint ready */
MCA_BASE_METADATA_PARAM_CHECKPOINT
},
/* Memory framework functions. These function pointer values
are replaced by memory_linux_ummunotify.c at run time if we
end up using ummunotify support. */
NULL,
opal_memory_base_component_register_empty,
opal_memory_base_component_deregister_empty
},
/* Component-specific data, filled in later (compiler will 0/NULL
it out) */
};
/*
* Register MCA params
*/
static int linux_register(void)
{
/* Information only */
mca_base_param_reg_int(&mca_memory_linux_component.super.memoryc_version,
"ptmalloc2_available",
"Whether ptmalloc2 support is included in Open MPI or not (1 = yes, 0 = no)",
false, true, MEMORY_LINUX_PTMALLOC2, NULL);
mca_base_param_reg_int(&mca_memory_linux_component.super.memoryc_version,
"ummunotify_available",
"Whether ummunotify support is included in Open MPI or not (1 = yes, 0 = no)",
false, true, MEMORY_LINUX_UMMUNOTIFY, NULL);
/* Allow user to manually enable/disable */
mca_base_param_reg_int(&mca_memory_linux_component.super.memoryc_version,
"ptmalloc2_enable",
"Whether to enable ptmalloc2 support or not (negative = try to enable, but continue even if support is not available, 0 = do not enable support, positive = try to enable and fail if support is not available)",
false, false, -1,
&mca_memory_linux_component.enable_ptmalloc2);
mca_base_param_reg_int(&mca_memory_linux_component.super.memoryc_version,
"ummunotify_enable",
"Whether to enable ummunotify support or not (negative = try to enable, but continue even if support is not available, 0 = do not enable support, positive = try to enable and fail if support is not available)",
false, false, -1,
&mca_memory_linux_component.enable_ummunotify);
return OPAL_SUCCESS;
}
static int linux_open(void)
{
int i, v;
i = mca_base_param_find("memory", NULL, "base_verbose");
mca_base_param_lookup_int(i, &v);
mca_memory_linux_component.verbose_level = v;
/* Try initializing ummunotify first; if that fails, try
ptmalloc2. */
#if MEMORY_LINUX_UMMUNOTIFY
if (mca_memory_linux_component.enable_ummunotify) {
if (v >= 10) {
opal_output(0, "memory:linux: attempting to initialize ummunotify support");
}
if (OPAL_SUCCESS == opal_memory_linux_ummunotify_open()) {
ummunotify_opened = true;
if (v >= 10) {
opal_output(0, "memory:linux: ummunotify successfully initialized; we'll use that");
}
return OPAL_SUCCESS;
}
if (v >= 10) {
opal_output(0, "memory:linux: ummunotify failed to initialize");
}
}
#endif
#if MEMORY_LINUX_PTMALLOC2
if (mca_memory_linux_component.enable_ptmalloc2) {
if (v >= 10) {
opal_output(0, "memory:linux: attempting to initialize ptmalloc2 support");
}
if (OPAL_SUCCESS == opal_memory_linux_ptmalloc2_open()) {
ptmalloc2_opened = true;
if (v >= 10) {
opal_output(0, "memory:linux: ptmalloc2 successfully initialized; we'll use that");
}
return OPAL_SUCCESS;
}
if (v >= 10) {
opal_output(0, "memory:linux: ummunotify failed to initialize");
}
}
#endif
/* We can return OPAL_ERR_NOT_AVAILABLE if nothing is
available; that will make the MCA base silently disregard this
component. */
if (v >= 10) {
opal_output(0, "memory:linux: no memory hooks available in this process");
}
return OPAL_ERR_NOT_AVAILABLE;
}
static int linux_close(void)
{
int v = mca_memory_linux_component.verbose_level;
#if MEMORY_LINUX_UMMUNOTIFY
if (ummunotify_opened) {
if (v >= 10) {
opal_output(0, "memory:linux: shutting down ummunotify support");
}
opal_memory_linux_ummunotify_close();
ummunotify_opened = false;
}
#endif
#if MEMORY_LINUX_PTMALLOC2
if (ptmalloc2_opened) {
if (v >= 10) {
opal_output(0, "memory:linux: shutting down ptmalloc2 support");
}
opal_memory_linux_ptmalloc2_close();
ptmalloc2_opened = false;
}
#endif
return OPAL_SUCCESS;
}
|
