src/libstatgrab/page_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 <time.h>
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#include <string.h>
#endif
#ifdef LINUX
#include <stdio.h>
#include "tools.h"
#endif
#ifdef FREEBSD
#include <sys/types.h>
#include <sys/sysctl.h>
#endif

static page_stat_t page_stats;
static int page_stats_uninit=1;

page_stat_t *get_page_stats(){
#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        cpu_stat_t cs;
#endif
#ifdef LINUX
        FILE *f;
        char *line_ptr;
#endif
#ifdef FREEBSD
        size_t size;
#endif

        page_stats.pages_pagein=0;
        page_stats.pages_pageout=0;

#ifdef SOLARIS
        if ((kc = kstat_open()) == NULL) {
                return NULL;
        }
        for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
                if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
                if (kstat_read(kc, ksp, &cs) == -1) {
                        continue;
                }

                page_stats.pages_pagein+=(long long)cs.cpu_vminfo.pgpgin;
                page_stats.pages_pageout+=(long long)cs.cpu_vminfo.pgpgout;
        }

        page_stats.systime=time(NULL);

        kstat_close(kc);
#endif
#ifdef LINUX
        if((f=fopen("/proc/stat", "r"))==NULL){
                return NULL;
        }
        if((line_ptr=f_read_line(f, "page"))==NULL){
                fclose(f);
                return NULL;
        }
        if((sscanf(line_ptr, "page %lld %lld", &page_stats.pages_pagein, &page_stats.pages_pageout))!=2){
                return NULL;
        }
        page_stats.systime=time(NULL);
        fclose(f);

#endif
#ifdef FREEBSD
        size = sizeof page_stats.pages_pagein;
        if (sysctlbyname("vm.stats.vm.v_swappgsin", &page_stats.pages_pagein, &size, NULL, 0) < 0){
                return NULL;
        }
        size = sizeof page_stats.pages_pageout;
        if (sysctlbyname("vm.stats.vm.v_swappgsout", &page_stats.pages_pageout, &size, NULL, 0) < 0){
                return NULL;
        }

#endif

        return &page_stats;
}

page_stat_t *get_page_stats_diff(){
        page_stat_t *page_ptr;
        static page_stat_t page_stats_diff;

        if(page_stats_uninit){
                page_ptr=get_page_stats();
                if(page_ptr==NULL){
                        return NULL;
                }
                page_stats_uninit=0;
                return page_ptr;
        }

        page_stats_diff.pages_pagein=page_stats.pages_pagein;
        page_stats_diff.pages_pageout=page_stats.pages_pageout;
        page_stats_diff.systime=page_stats.systime;

        page_ptr=get_page_stats();
        if(page_ptr==NULL){
                return NULL;
        }

        page_stats_diff.pages_pagein=page_stats.pages_pagein-page_stats_diff.pages_pagein;
        page_stats_diff.pages_pageout=page_stats.pages_pageout-page_stats_diff.pages_pageout;
        page_stats_diff.systime=page_stats.systime-page_stats_diff.systime;
        
        return &page_stats_diff;
}
Revision:	1.8
Committed:	Sat Oct 18 23:04:23 2003 UTC (20 years, 7 months ago) by ats
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+2 -0 lines
Log Message:	... and the size parameter should be initialised to the size of the buffer first (although FreeBSD doesn't actually seem to care, NetBSD does, and the manual page says so).
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3	tdb	1.6	* 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	pajs	1.2	#include "statgrab.h"
26	pajs	1.4	#include <time.h>
27	pajs	1.1	#ifdef SOLARIS
28			#include <kstat.h>
29			#include <sys/sysinfo.h>
30	pajs	1.2	#include <string.h>
31	pajs	1.1	#endif
32	pajs	1.4	#ifdef LINUX
33			#include <stdio.h>
34			#include "tools.h"
35			#endif
36	pajs	1.5	#ifdef FREEBSD
37			#include <sys/types.h>
38			#include <sys/sysctl.h>
39			#endif
40	pajs	1.3
41			static page_stat_t page_stats;
42			static int page_stats_uninit=1;
43
44	pajs	1.1	page_stat_t *get_page_stats(){
45	pajs	1.4	#ifdef SOLARIS
46	pajs	1.1	kstat_ctl_t *kc;
47			kstat_t *ksp;
48			cpu_stat_t cs;
49	pajs	1.4	#endif
50			#ifdef LINUX
51			FILE *f;
52			char *line_ptr;
53			#endif
54	pajs	1.5	#ifdef FREEBSD
55			size_t size;
56			#endif
57	pajs	1.2
58			page_stats.pages_pagein=0;
59			page_stats.pages_pageout=0;
60	pajs	1.1
61	pajs	1.4	#ifdef SOLARIS
62	pajs	1.1	if ((kc = kstat_open()) == NULL) {
63			return NULL;
64			}
65			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
66			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
67			if (kstat_read(kc, ksp, &cs) == -1) {
68			continue;
69			}
70
71	pajs	1.2	page_stats.pages_pagein+=(long long)cs.cpu_vminfo.pgpgin;
72			page_stats.pages_pageout+=(long long)cs.cpu_vminfo.pgpgout;
73			}
74
75			page_stats.systime=time(NULL);
76
77			kstat_close(kc);
78	pajs	1.4	#endif
79			#ifdef LINUX
80			if((f=fopen("/proc/stat", "r"))==NULL){
81			return NULL;
82			}
83			if((line_ptr=f_read_line(f, "page"))==NULL){
84			fclose(f);
85			return NULL;
86			}
87			if((sscanf(line_ptr, "page %lld %lld", &page_stats.pages_pagein, &page_stats.pages_pageout))!=2){
88			return NULL;
89			}
90			page_stats.systime=time(NULL);
91			fclose(f);
92	pajs	1.5
93			#endif
94			#ifdef FREEBSD
95	ats	1.8	size = sizeof page_stats.pages_pagein;
96	ats	1.7	if (sysctlbyname("vm.stats.vm.v_swappgsin", &page_stats.pages_pagein, &size, NULL, 0) < 0){
97	pajs	1.5	return NULL;
98			}
99	ats	1.8	size = sizeof page_stats.pages_pageout;
100	ats	1.7	if (sysctlbyname("vm.stats.vm.v_swappgsout", &page_stats.pages_pageout, &size, NULL, 0) < 0){
101	pajs	1.5	return NULL;
102			}
103	pajs	1.4
104			#endif
105	pajs	1.1
106	pajs	1.2	return &page_stats;
107	pajs	1.3	}
108
109			page_stat_t *get_page_stats_diff(){
110			page_stat_t *page_ptr;
111			static page_stat_t page_stats_diff;
112
113			if(page_stats_uninit){
114			page_ptr=get_page_stats();
115			if(page_ptr==NULL){
116			return NULL;
117			}
118			page_stats_uninit=0;
119			return page_ptr;
120			}
121
122			page_stats_diff.pages_pagein=page_stats.pages_pagein;
123			page_stats_diff.pages_pageout=page_stats.pages_pageout;
124			page_stats_diff.systime=page_stats.systime;
125
126			page_ptr=get_page_stats();
127			if(page_ptr==NULL){
128			return NULL;
129			}
130
131			page_stats_diff.pages_pagein=page_stats.pages_pagein-page_stats_diff.pages_pagein;
132			page_stats_diff.pages_pageout=page_stats.pages_pageout-page_stats_diff.pages_pageout;
133			page_stats_diff.systime=page_stats.systime-page_stats_diff.systime;
134
135			return &page_stats_diff;
136	pajs	1.1	}