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