src/libstatgrab/page_stats.c

/*
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; 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"
#include <time.h>
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#include <string.h>
#endif
#if defined(LINUX) || defined(CYGWIN)
#include <stdio.h>
#include <string.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
#if defined(LINUX) || defined(CYGWIN)
        FILE *f;
        char *line_ptr;
#endif
#ifdef FREEBSD
        size_t size;
#endif
#ifdef NETBSD
        struct uvmexp *uvm;
#endif

        page_stats.systime = time(NULL);
        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;
        }

        kstat_close(kc);
#endif
#if defined(LINUX) || defined(CYGWIN)
        if ((f = fopen("/proc/vmstat", "r")) != NULL) {
                while ((line_ptr = f_read_line(f, "")) != NULL) {
                        long long value;

                        if (sscanf(line_ptr, "%*s %lld", &value) != 1) {
                                continue;
                        }

                        if (strncmp(line_ptr, "pgpgin ", 7) == 0) {
                                page_stats.pages_pagein = value;
                        } else if (strncmp(line_ptr, "pgpgout ", 8) == 0) {
                                page_stats.pages_pageout = value;
                        }
                }

                fclose(f);
        } else if ((f = fopen("/proc/stat", "r")) != 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) {
                        fclose(f);
                        return NULL;
                }

                fclose(f);
        } else {
                return NULL;
        }
#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
#ifdef NETBSD
        if ((uvm = get_uvmexp()) == NULL) {
                return NULL;
        }
        page_stats.pages_pagein = uvm->pgswapin;
        page_stats.pages_pageout = uvm->pgswapout;
#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:	1.13
Committed:	Fri Jan 16 15:54:54 2004 UTC (20 years, 4 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+13 -12 lines
Log Message:	Alter the licensing of libstatgrab. The library part is now under the LGPL, whilst the tools/examples are under the GPL. Both licenses are included in the distribution (and are both now in CVS). Also made a minor alteration to the webpage where it said everything was licensed under the GPL.
#	User	Rev	Content
1	tdb	1.13	/*
2	pajs	1.1	* i-scream central monitoring system
3	tdb	1.6	* http://www.i-scream.org
4	tdb	1.13	* Copyright (C) 2000-2004 i-scream
5	pajs	1.1	*
6	tdb	1.13	* This library is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10	pajs	1.1	*
11	tdb	1.13	* This library is distributed in the hope that it will be useful,
12	pajs	1.1	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	tdb	1.13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15	pajs	1.1	*
16	tdb	1.13	* You should have received a copy of the GNU Lesser General Public
17			* License along with this library; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19			* 02111-1307 USA
20	pajs	1.1	*/
21
22			#ifdef HAVE_CONFIG_H
23			#include "config.h"
24			#endif
25
26	pajs	1.2	#include "statgrab.h"
27	ats	1.9	#include "tools.h"
28	pajs	1.4	#include <time.h>
29	pajs	1.1	#ifdef SOLARIS
30			#include <kstat.h>
31			#include <sys/sysinfo.h>
32	pajs	1.2	#include <string.h>
33	pajs	1.1	#endif
34	ats	1.11	#if defined(LINUX) \|\| defined(CYGWIN)
35	pajs	1.4	#include <stdio.h>
36	ats	1.10	#include <string.h>
37	pajs	1.4	#endif
38	pajs	1.5	#ifdef FREEBSD
39			#include <sys/types.h>
40			#include <sys/sysctl.h>
41			#endif
42	pajs	1.3
43			static page_stat_t page_stats;
44			static int page_stats_uninit=1;
45
46	pajs	1.1	page_stat_t *get_page_stats(){
47	pajs	1.4	#ifdef SOLARIS
48	pajs	1.1	kstat_ctl_t *kc;
49			kstat_t *ksp;
50			cpu_stat_t cs;
51	pajs	1.4	#endif
52	ats	1.11	#if defined(LINUX) \|\| defined(CYGWIN)
53	pajs	1.4	FILE *f;
54			char *line_ptr;
55			#endif
56	pajs	1.5	#ifdef FREEBSD
57			size_t size;
58			#endif
59	ats	1.9	#ifdef NETBSD
60			struct uvmexp *uvm;
61			#endif
62	pajs	1.2
63	ats	1.9	page_stats.systime = time(NULL);
64	pajs	1.2	page_stats.pages_pagein=0;
65			page_stats.pages_pageout=0;
66	pajs	1.1
67	pajs	1.4	#ifdef SOLARIS
68	pajs	1.1	if ((kc = kstat_open()) == NULL) {
69			return NULL;
70			}
71			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
72			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
73			if (kstat_read(kc, ksp, &cs) == -1) {
74			continue;
75			}
76
77	pajs	1.2	page_stats.pages_pagein+=(long long)cs.cpu_vminfo.pgpgin;
78			page_stats.pages_pageout+=(long long)cs.cpu_vminfo.pgpgout;
79			}
80
81			kstat_close(kc);
82	pajs	1.4	#endif
83	ats	1.11	#if defined(LINUX) \|\| defined(CYGWIN)
84	ats	1.10	if ((f = fopen("/proc/vmstat", "r")) != NULL) {
85			while ((line_ptr = f_read_line(f, "")) != NULL) {
86			long long value;
87
88			if (sscanf(line_ptr, "%*s %lld", &value) != 1) {
89			continue;
90			}
91
92			if (strncmp(line_ptr, "pgpgin ", 7) == 0) {
93			page_stats.pages_pagein = value;
94			} else if (strncmp(line_ptr, "pgpgout ", 8) == 0) {
95			page_stats.pages_pageout = value;
96			}
97			}
98
99			fclose(f);
100			} else if ((f = fopen("/proc/stat", "r")) != NULL) {
101			if ((line_ptr = f_read_line(f, "page")) == NULL) {
102			fclose(f);
103			return NULL;
104			}
105
106			if (sscanf(line_ptr, "page %lld %lld", &page_stats.pages_pagein, &page_stats.pages_pageout) != 2) {
107	pajs	1.12	fclose(f);
108	ats	1.10	return NULL;
109			}
110
111	pajs	1.4	fclose(f);
112	ats	1.10	} else {
113	pajs	1.4	return NULL;
114			}
115	pajs	1.5	#endif
116			#ifdef FREEBSD
117	ats	1.8	size = sizeof page_stats.pages_pagein;
118	ats	1.7	if (sysctlbyname("vm.stats.vm.v_swappgsin", &page_stats.pages_pagein, &size, NULL, 0) < 0){
119	pajs	1.5	return NULL;
120			}
121	ats	1.8	size = sizeof page_stats.pages_pageout;
122	ats	1.7	if (sysctlbyname("vm.stats.vm.v_swappgsout", &page_stats.pages_pageout, &size, NULL, 0) < 0){
123	pajs	1.5	return NULL;
124			}
125	ats	1.9	#endif
126			#ifdef NETBSD
127			if ((uvm = get_uvmexp()) == NULL) {
128			return NULL;
129			}
130			page_stats.pages_pagein = uvm->pgswapin;
131			page_stats.pages_pageout = uvm->pgswapout;
132	pajs	1.4	#endif
133	pajs	1.1
134	pajs	1.2	return &page_stats;
135	pajs	1.3	}
136
137			page_stat_t *get_page_stats_diff(){
138			page_stat_t *page_ptr;
139			static page_stat_t page_stats_diff;
140
141			if(page_stats_uninit){
142			page_ptr=get_page_stats();
143			if(page_ptr==NULL){
144			return NULL;
145			}
146			page_stats_uninit=0;
147			return page_ptr;
148			}
149
150			page_stats_diff.pages_pagein=page_stats.pages_pagein;
151			page_stats_diff.pages_pageout=page_stats.pages_pageout;
152			page_stats_diff.systime=page_stats.systime;
153
154			page_ptr=get_page_stats();
155			if(page_ptr==NULL){
156			return NULL;
157			}
158
159			page_stats_diff.pages_pagein=page_stats.pages_pagein-page_stats_diff.pages_pagein;
160			page_stats_diff.pages_pageout=page_stats.pages_pageout-page_stats_diff.pages_pageout;
161			page_stats_diff.systime=page_stats.systime-page_stats_diff.systime;
162
163			return &page_stats_diff;
164	pajs	1.1	}