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
|
/*
* Copyright (c) 2004-2005 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) 2007 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
* This file is only here because some platforms have a broken strncpy
* (e.g., Itanium with RedHat Advanced Server glibc).
*/
#include "opal_config.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <errno.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include "opal/constants.h"
#include "opal/mca/base/mca_base_param.h"
#include "opal/util/sys_limits.h"
#include "opal/util/output.h"
/*
* Create and initialize storage for the system limits
*/
OPAL_DECLSPEC opal_sys_limits_t opal_sys_limits = {
/* initialized = */ false,
/* num_files = */ -1,
/* num_procs = */ -1,
/* file_size = */ 0
};
int opal_util_init_sys_limits(void)
{
#ifndef __WINDOWS__
struct rlimit rlim;
#endif
int value;
bool set_lims;
mca_base_param_reg_int_name("opal", "set_max_sys_limits",
"Set to non-zero to automatically set any system-imposed limits to the maximum allowed",
false, false, (int)false, &value);
set_lims = OPAL_INT_TO_BOOL(value);
#ifdef __WINDOWS__
/* George: please insert whatever is needed here someday */
#else
/* get/set the system limits on number of files we can have open */
if (getrlimit (RLIMIT_NOFILE, &rlim) < 0) {
opal_output(0, "getrlimit (RLIMIT_NOFILE) failed: %s\n", strerror(errno));
} else {
if (set_lims) {
rlim.rlim_cur = rlim.rlim_max;
if (setrlimit (RLIMIT_NOFILE, &rlim) < 0) {
opal_output(0, "setrlimit (RLIMIT_NOFILE) failed: %s\n", strerror(errno));
}
}
opal_sys_limits.num_files = rlim.rlim_cur;
}
#if HAVE_DECL_RLIMIT_NPROC
/* get/set the system limits on number of child procs we can have open */
if (getrlimit (RLIMIT_NPROC, &rlim) < 0) {
opal_output(0, "getrlimit (RLIMIT_NPROC) failed: %s\n", strerror(errno));
} else {
if (set_lims) {
rlim.rlim_cur = rlim.rlim_max;
if (setrlimit (RLIMIT_NPROC, &rlim) < 0) {
opal_output(0, "setrlimit (RLIMIT_NPROC) failed: %s\n", strerror(errno));
}
}
opal_sys_limits.num_procs = rlim.rlim_cur;
}
#endif
/* get/set the system limits on max file size we can create */
if (getrlimit (RLIMIT_FSIZE, &rlim) < 0) {
opal_output(0, "getrlimit (RLIMIT_FSIZE) failed: %s\n", strerror(errno));
} else {
if (set_lims) {
rlim.rlim_cur = rlim.rlim_max;
if (setrlimit (RLIMIT_FSIZE, &rlim) < 0) {
opal_output(0, "setrlimit (RLIMIT_FSIZE) failed: %s\n", strerror(errno));
}
}
opal_sys_limits.file_size = rlim.rlim_cur;
}
/* indicate we initialized the limits structure */
opal_sys_limits.initialized = true;
#endif
return OPAL_SUCCESS;
}
|
