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/* |
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* i-scream libstatgrab |
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* http://www.i-scream.org |
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* Copyright (C) 2000-2004 i-scream |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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* 02111-1307 USA |
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* |
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* $Id: memory_stats.c,v 1.36 2010/02/21 10:04:26 tdb Exp $ |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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|
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#include "statgrab.h" |
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#include "tools.h" |
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#ifdef SOLARIS |
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#include <unistd.h> |
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#include <kstat.h> |
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#endif |
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#if defined(LINUX) || defined(CYGWIN) |
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#include <stdio.h> |
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#include <string.h> |
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#endif |
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#if defined(FREEBSD) || defined(DFBSD) |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#include <unistd.h> |
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#endif |
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#if defined(NETBSD) |
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#include <sys/param.h> |
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#include <sys/time.h> |
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#include <uvm/uvm.h> |
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#endif |
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#if defined(OPENBSD) |
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#include <sys/param.h> |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#include <sys/unistd.h> |
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#endif |
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#ifdef HPUX |
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#include <sys/param.h> |
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#include <sys/pstat.h> |
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#include <unistd.h> |
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#endif |
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#ifdef AIX |
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#include <unistd.h> |
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#include <libperfstat.h> |
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#endif |
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#ifdef WIN32 |
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#include <windows.h> |
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#include "win32.h" |
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#endif |
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|
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sg_mem_stats *sg_get_mem_stats(){ |
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|
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static sg_mem_stats mem_stat; |
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|
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#ifdef HPUX |
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struct pst_static *pstat_static; |
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struct pst_dynamic pstat_dynamic; |
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long long pagesize; |
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#endif |
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#ifdef SOLARIS |
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kstat_ctl_t *kc; |
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kstat_t *ksp; |
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kstat_named_t *kn; |
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long totalmem; |
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int pagesize; |
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#endif |
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#if defined(LINUX) || defined(CYGWIN) |
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char *line_ptr; |
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unsigned long long value; |
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FILE *f; |
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#endif |
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#if defined(FREEBSD) || defined(DFBSD) |
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int mib[2]; |
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u_long physmem; |
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size_t size; |
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u_long free_count; |
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u_long cache_count; |
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u_long inactive_count; |
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int pagesize; |
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#endif |
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#if defined(NETBSD) |
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struct uvmexp *uvm; |
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#endif |
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#if defined(OPENBSD) |
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int mib[2]; |
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struct vmtotal vmtotal; |
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size_t size; |
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int pagesize, page_multiplier; |
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#endif |
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#ifdef AIX |
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perfstat_memory_total_t mem; |
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long long pagesize; |
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#endif |
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#ifdef WIN32 |
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MEMORYSTATUSEX memstats; |
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#endif |
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|
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#ifdef HPUX |
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if((pagesize=sysconf(_SC_PAGESIZE)) == -1){ |
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sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PAGESIZE"); |
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return NULL; |
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} |
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|
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if (pstat_getdynamic(&pstat_dynamic, sizeof(pstat_dynamic), 1, 0) == -1) { |
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sg_set_error_with_errno(SG_ERROR_PSTAT, "pstat_dynamic"); |
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return NULL; |
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} |
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pstat_static = sg_get_pstat_static(); |
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if (pstat_static == NULL) { |
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return NULL; |
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} |
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|
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/* FIXME Does this include swap? */ |
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mem_stat.total = ((long long) pstat_static->physical_memory) * pagesize; |
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mem_stat.free = ((long long) pstat_dynamic.psd_free) * pagesize; |
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mem_stat.used = mem_stat.total - mem_stat.free; |
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#endif |
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#ifdef AIX |
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if((pagesize=sysconf(_SC_PAGESIZE)) == -1){ |
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sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PAGESIZE"); |
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return NULL; |
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} |
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|
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/* return code is number of structures returned */ |
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if(perfstat_memory_total(NULL, &mem, sizeof(perfstat_memory_total_t), 1) != 1) { |
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sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME, "perfstat_memory_total"); |
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return NULL; |
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} |
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|
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mem_stat.total = ((long long) mem.real_total) * pagesize; |
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mem_stat.free = ((long long) mem.real_free) * pagesize; |
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mem_stat.used = ((long long) mem.real_inuse) * pagesize; |
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mem_stat.cache = ((long long) mem.numperm) * pagesize; |
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#endif |
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#ifdef SOLARIS |
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if((pagesize=sysconf(_SC_PAGESIZE)) == -1){ |
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sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PAGESIZE"); |
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return NULL; |
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} |
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|
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if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){ |
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sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PHYS_PAGES"); |
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return NULL; |
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} |
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|
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if ((kc = kstat_open()) == NULL) { |
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sg_set_error(SG_ERROR_KSTAT_OPEN, NULL); |
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return NULL; |
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} |
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if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){ |
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sg_set_error(SG_ERROR_KSTAT_LOOKUP, "unix,0,system_pages"); |
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return NULL; |
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} |
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if (kstat_read(kc, ksp, 0) == -1) { |
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sg_set_error(SG_ERROR_KSTAT_READ, NULL); |
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return NULL; |
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} |
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if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){ |
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sg_set_error(SG_ERROR_KSTAT_DATA_LOOKUP, "freemem"); |
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return NULL; |
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} |
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kstat_close(kc); |
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|
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mem_stat.total = (long long)totalmem * (long long)pagesize; |
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mem_stat.free = ((long long)kn->value.ul) * (long long)pagesize; |
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mem_stat.used = mem_stat.total - mem_stat.free; |
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#endif |
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|
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#if defined(LINUX) || defined(CYGWIN) |
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if ((f = fopen("/proc/meminfo", "r")) == NULL) { |
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sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/meminfo"); |
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return NULL; |
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} |
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|
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while ((line_ptr = sg_f_read_line(f, "")) != NULL) { |
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if (sscanf(line_ptr, "%*s %llu kB", &value) != 1) { |
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continue; |
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} |
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value *= 1024; |
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|
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if (strncmp(line_ptr, "MemTotal:", 9) == 0) { |
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mem_stat.total = value; |
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} else if (strncmp(line_ptr, "MemFree:", 8) == 0) { |
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mem_stat.free = value; |
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} else if (strncmp(line_ptr, "Cached:", 7) == 0) { |
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mem_stat.cache = value; |
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} |
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} |
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|
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fclose(f); |
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mem_stat.used = mem_stat.total - mem_stat.free; |
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#endif |
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|
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#if defined(FREEBSD) || defined(DFBSD) |
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/* Returns bytes */ |
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mib[0] = CTL_HW; |
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mib[1] = HW_PHYSMEM; |
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size = sizeof physmem; |
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if (sysctl(mib, 2, &physmem, &size, NULL, 0) < 0) { |
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sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_PHYSMEM"); |
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return NULL; |
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} |
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mem_stat.total = physmem; |
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|
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/*returns pages*/ |
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size = sizeof free_count; |
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if (sysctlbyname("vm.stats.vm.v_free_count", &free_count, &size, NULL, 0) < 0){ |
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sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME, |
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"vm.stats.vm.v_free_count"); |
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return NULL; |
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} |
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|
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size = sizeof inactive_count; |
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if (sysctlbyname("vm.stats.vm.v_inactive_count", &inactive_count , &size, NULL, 0) < 0){ |
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sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME, |
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"vm.stats.vm.v_inactive_count"); |
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return NULL; |
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} |
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|
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size = sizeof cache_count; |
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if (sysctlbyname("vm.stats.vm.v_cache_count", &cache_count, &size, NULL, 0) < 0){ |
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sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME, |
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"vm.stats.vm.v_cache_count"); |
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return NULL; |
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} |
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|
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/* Because all the vm.stats returns pages, I need to get the page size. |
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* After that I then need to multiple the anything that used vm.stats to |
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* get the system statistics by pagesize |
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*/ |
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pagesize = getpagesize(); |
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mem_stat.cache=cache_count*pagesize; |
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|
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/* Of couse nothing is ever that simple :) And I have inactive pages to |
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* deal with too. So I'm going to add them to free memory :) |
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*/ |
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mem_stat.free=(free_count*pagesize)+(inactive_count*pagesize); |
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mem_stat.used=physmem-mem_stat.free; |
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#endif |
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|
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#if defined(NETBSD) |
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if ((uvm = sg_get_uvmexp()) == NULL) { |
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return NULL; |
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} |
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|
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mem_stat.total = uvm->pagesize * uvm->npages; |
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mem_stat.cache = uvm->pagesize * (uvm->filepages + uvm->execpages); |
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mem_stat.free = uvm->pagesize * (uvm->free + uvm->inactive); |
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mem_stat.used = mem_stat.total - mem_stat.free; |
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#endif |
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|
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#if defined(OPENBSD) |
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/* The code in this section is based on the code in the OpenBSD |
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* top utility, located at src/usr.bin/top/machine.c in the |
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* OpenBSD source tree. |
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* |
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* For fun, and like OpenBSD top, we will do the multiplication |
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* converting the memory stats in pages to bytes in base 2. |
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*/ |
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|
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/* All memory stats in OpenBSD are returned as the number of pages. |
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* To convert this into the number of bytes we need to know the |
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* page size on this system. |
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*/ |
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pagesize = sysconf(_SC_PAGESIZE); |
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|
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/* The pagesize gives us the base 10 multiplier, so we need to work |
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* out what the base 2 multiplier is. This means dividing |
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* pagesize by 2 until we reach unity, and counting the number of |
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* divisions required. |
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*/ |
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page_multiplier = 0; |
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|
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while (pagesize > 1) { |
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page_multiplier++; |
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pagesize >>= 1; |
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} |
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|
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/* We can now ret the the raw VM stats (in pages) using the |
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* sysctl interface. |
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*/ |
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mib[0] = CTL_VM; |
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mib[1] = VM_METER; |
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size = sizeof(vmtotal); |
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|
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if (sysctl(mib, 2, &vmtotal, &size, NULL, 0) < 0) { |
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bzero(&vmtotal, sizeof(vmtotal)); |
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sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_VM.VM_METER"); |
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return NULL; |
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} |
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|
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/* Convert the raw stats to bytes, and return these to the caller |
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*/ |
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mem_stat.used = (vmtotal.t_rm << page_multiplier); /* total real mem in use */ |
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mem_stat.cache = 0; /* no cache stats */ |
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mem_stat.free = (vmtotal.t_free << page_multiplier); /* free memory pages */ |
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mem_stat.total = (mem_stat.used + mem_stat.free); |
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#endif |
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|
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#ifdef WIN32 |
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memstats.dwLength = sizeof(memstats); |
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if (!GlobalMemoryStatusEx(&memstats)) { |
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sg_set_error_with_errno(SG_ERROR_MEMSTATUS, NULL); |
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return NULL; |
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} |
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mem_stat.free = memstats.ullAvailPhys; |
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mem_stat.total = memstats.ullTotalPhys; |
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mem_stat.used = mem_stat.total - mem_stat.free; |
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if(read_counter_large(SG_WIN32_MEM_CACHE, &mem_stat.cache)) { |
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mem_stat.cache = 0; |
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} |
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#endif |
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return &mem_stat; |
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} |
