src/libstatgrab/memory_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2003 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "statgrab.h"
#include "tools.h"
#ifdef SOLARIS
#include <unistd.h>
#include <kstat.h>
#endif
#ifdef LINUX
#include <stdio.h>
#include <string.h>
#endif
#ifdef FREEBSD
#include <sys/types.h>
#include <sys/sysctl.h>
#include <unistd.h>
#endif

mem_stat_t *get_memory_stats(){

        static mem_stat_t mem_stat;

#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *kn;
        long totalmem;
        int pagesize;
#endif
#ifdef LINUX
        char *line_ptr;
        FILE *f;
#endif
#ifdef FREEBSD
        int mib[2];
        u_long physmem;
        size_t size;
        u_int free_count;
        u_int cache_count;
        u_int inactive_count;
        int pagesize;
#endif
#ifdef NETBSD
        struct uvmexp *uvm;
#endif

#ifdef SOLARIS
        if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
                return NULL;    
        }

        if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){
                return NULL;
        }

        if ((kc = kstat_open()) == NULL) {
                return NULL;
        }
        if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){
                return NULL;
        }
        if (kstat_read(kc, ksp, 0) == -1) {
                return NULL;
        }
        if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){
                return NULL;
        }
        kstat_close(kc);

        mem_stat.total = (long long)totalmem * (long long)pagesize;
        mem_stat.free = ((long long)kn->value.ul) * (long long)pagesize;
        mem_stat.used = mem_stat.total - mem_stat.free;
#endif

#ifdef LINUX
        f=fopen("/proc/meminfo", "r");
        if(f==NULL){
                return NULL;
        }

        if((line_ptr=f_read_line(f, "Mem:"))==NULL){
                fclose(f);
                return NULL;
        }

        fclose(f);

        /* Linux actually stores this as a unsigned long long, but
         * our structures are just long longs. This shouldn't be a
         * problem for sometime yet :) 
         */
        if((sscanf(line_ptr,"Mem:  %lld %lld %lld %*d %*d %lld", \
                &mem_stat.total, \
                &mem_stat.used, \
                &mem_stat.free, \
                &mem_stat.cache))!=4){
                        return NULL;
        }

#endif

#ifdef FREEBSD
        /* Returns bytes */
        mib[0] = CTL_HW;
        mib[1] = HW_PHYSMEM;
        size = sizeof physmem;
        if (sysctl(mib, 2, &physmem, &size, NULL, 0) < 0) {
                return NULL;
        }
        mem_stat.total = physmem;

        /*returns pages*/
        size = sizeof free_count;
        if (sysctlbyname("vm.stats.vm.v_free_count", &free_count, &size, NULL, 0) < 0){
                return NULL;
        }

        size = sizeof inactive_count;
        if (sysctlbyname("vm.stats.vm.v_inactive_count", &inactive_count , &size, NULL, 0) < 0){
                return NULL;
        }

        size = sizeof cache_count;
        if (sysctlbyname("vm.stats.vm.v_cache_count", &cache_count, &size, NULL, 0) < 0){
                return NULL;
        }

        /* Because all the vm.stats returns pages, I need to get the page size.
         * After that I then need to multiple the anything that used vm.stats to
         * get the system statistics by pagesize 
         */
        if ((pagesize=getpagesize()) == -1){
                return NULL;
        }

        mem_stat.cache=cache_count*pagesize;

        /* Of couse nothing is ever that simple :) And I have inactive pages to
         * deal with too. So I'm going to add them to free memory :)
         */
        mem_stat.free=(free_count*pagesize)+(inactive_count*pagesize);
        mem_stat.used=physmem-mem_stat.free;
#endif

#ifdef NETBSD
        if ((uvm = get_uvmexp()) == NULL) {
                return NULL;
        }
        mem_stat.total = uvm->pagesize * uvm->npages;
        mem_stat.cache = uvm->pagesize * (uvm->filepages + uvm->execpages);
        mem_stat.free = uvm->pagesize * (uvm->free + uvm->inactive);
        mem_stat.used = mem_stat.total - mem_stat.free;
#endif

        return &mem_stat;
}
Revision:	1.14
Committed:	Mon Oct 20 18:13:35 2003 UTC (20 years, 7 months ago) by ats
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_7
Changes since 1.13:	+8 -17 lines
Log Message:	Clean up NetBSD memory calculations.
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3	tdb	1.7	* http://www.i-scream.org
4			* Copyright (C) 2000-2003 i-scream
5	pajs	1.1	*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19			*/
20
21			#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24
25			#include "statgrab.h"
26	ats	1.12	#include "tools.h"
27	pajs	1.1	#ifdef SOLARIS
28			#include <unistd.h>
29			#include <kstat.h>
30			#endif
31	pajs	1.5	#ifdef LINUX
32			#include <stdio.h>
33			#include <string.h>
34			#endif
35	pajs	1.6	#ifdef FREEBSD
36			#include <sys/types.h>
37			#include <sys/sysctl.h>
38			#include <unistd.h>
39			#endif
40	pajs	1.1
41			mem_stat_t *get_memory_stats(){
42
43			static mem_stat_t mem_stat;
44
45			#ifdef SOLARIS
46			kstat_ctl_t *kc;
47			kstat_t *ksp;
48			kstat_named_t *kn;
49			long totalmem;
50			int pagesize;
51			#endif
52	pajs	1.5	#ifdef LINUX
53			char *line_ptr;
54			FILE *f;
55			#endif
56	ats	1.14	#ifdef FREEBSD
57	ats	1.12	int mib[2];
58	ats	1.14	u_long physmem;
59			size_t size;
60	tdb	1.8	u_int free_count;
61			u_int cache_count;
62			u_int inactive_count;
63	ats	1.12	int pagesize;
64			#endif
65			#ifdef NETBSD
66			struct uvmexp *uvm;
67			#endif
68	pajs	1.1
69			#ifdef SOLARIS
70			if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
71			return NULL;
72			}
73
74			if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){
75			return NULL;
76			}
77
78			if ((kc = kstat_open()) == NULL) {
79			return NULL;
80			}
81			if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){
82			return NULL;
83			}
84			if (kstat_read(kc, ksp, 0) == -1) {
85			return NULL;
86			}
87			if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){
88			return NULL;
89			}
90	pajs	1.2	kstat_close(kc);
91
92	pajs	1.1	mem_stat.total = (long long)totalmem * (long long)pagesize;
93			mem_stat.free = ((long long)kn->value.ul) * (long long)pagesize;
94			mem_stat.used = mem_stat.total - mem_stat.free;
95	pajs	1.5	#endif
96
97			#ifdef LINUX
98			f=fopen("/proc/meminfo", "r");
99			if(f==NULL){
100			return NULL;
101			}
102
103			if((line_ptr=f_read_line(f, "Mem:"))==NULL){
104			fclose(f);
105			return NULL;
106			}
107
108			fclose(f);
109
110			/* Linux actually stores this as a unsigned long long, but
111			* our structures are just long longs. This shouldn't be a
112			* problem for sometime yet :)
113			*/
114			if((sscanf(line_ptr,"Mem: %lld %lld %lld %d %d %lld", \
115			&mem_stat.total, \
116			&mem_stat.used, \
117			&mem_stat.free, \
118			&mem_stat.cache))!=4){
119			return NULL;
120			}
121	pajs	1.6
122			#endif
123
124	ats	1.14	#ifdef FREEBSD
125	tdb	1.8	/* Returns bytes */
126	ats	1.12	mib[0] = CTL_HW;
127			mib[1] = HW_PHYSMEM;
128	ats	1.11	size = sizeof physmem;
129	ats	1.12	if (sysctl(mib, 2, &physmem, &size, NULL, 0) < 0) {
130	pajs	1.6	return NULL;
131	ats	1.12	}
132			mem_stat.total = physmem;
133	pajs	1.6
134			/returns pages/
135	ats	1.11	size = sizeof free_count;
136	ats	1.10	if (sysctlbyname("vm.stats.vm.v_free_count", &free_count, &size, NULL, 0) < 0){
137	pajs	1.6	return NULL;
138			}
139
140	ats	1.11	size = sizeof inactive_count;
141	ats	1.10	if (sysctlbyname("vm.stats.vm.v_inactive_count", &inactive_count , &size, NULL, 0) < 0){
142	pajs	1.6	return NULL;
143			}
144
145	ats	1.11	size = sizeof cache_count;
146	ats	1.10	if (sysctlbyname("vm.stats.vm.v_cache_count", &cache_count, &size, NULL, 0) < 0){
147	pajs	1.6	return NULL;
148			}
149
150	tdb	1.8	/* Because all the vm.stats returns pages, I need to get the page size.
151			* After that I then need to multiple the anything that used vm.stats to
152			* get the system statistics by pagesize
153	pajs	1.6	*/
154			if ((pagesize=getpagesize()) == -1){
155			return NULL;
156			}
157
158	tdb	1.8	mem_stat.cache=cache_count*pagesize;
159
160			/* Of couse nothing is ever that simple :) And I have inactive pages to
161			* deal with too. So I'm going to add them to free memory :)
162	pajs	1.6	*/
163	tdb	1.8	mem_stat.free=(free_countpagesize)+(inactive_countpagesize);
164			mem_stat.used=physmem-mem_stat.free;
165	ats	1.12	#endif
166	ats	1.14
167	ats	1.12	#ifdef NETBSD
168			if ((uvm = get_uvmexp()) == NULL) {
169			return NULL;
170			}
171	ats	1.14	mem_stat.total = uvm->pagesize * uvm->npages;
172	ats	1.12	mem_stat.cache = uvm->pagesize * (uvm->filepages + uvm->execpages);
173	ats	1.14	mem_stat.free = uvm->pagesize * (uvm->free + uvm->inactive);
174			mem_stat.used = mem_stat.total - mem_stat.free;
175	pajs	1.1	#endif
176
177			return &mem_stat;
178			}