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
 *
 * $Id$
 */

#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:	1.14
Committed:	Mon Jan 19 16:49:21 2004 UTC (20 years, 3 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_8_2, LIBSTATGRAB_0_8_1
Changes since 1.13:	+2 -0 lines
Log Message:	A whole bunch of minor cosmetic changes.
#	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	tdb	1.14	*
21			* $Id$
22	pajs	1.1	*/
23
24			#ifdef HAVE_CONFIG_H
25			#include "config.h"
26			#endif
27
28	pajs	1.2	#include "statgrab.h"
29	ats	1.9	#include "tools.h"
30	pajs	1.4	#include <time.h>
31	pajs	1.1	#ifdef SOLARIS
32			#include <kstat.h>
33			#include <sys/sysinfo.h>
34	pajs	1.2	#include <string.h>
35	pajs	1.1	#endif
36	ats	1.11	#if defined(LINUX) \|\| defined(CYGWIN)
37	pajs	1.4	#include <stdio.h>
38	ats	1.10	#include <string.h>
39	pajs	1.4	#endif
40	pajs	1.5	#ifdef FREEBSD
41			#include <sys/types.h>
42			#include <sys/sysctl.h>
43			#endif
44	pajs	1.3
45			static page_stat_t page_stats;
46			static int page_stats_uninit=1;
47
48	pajs	1.1	page_stat_t *get_page_stats(){
49	pajs	1.4	#ifdef SOLARIS
50	pajs	1.1	kstat_ctl_t *kc;
51			kstat_t *ksp;
52			cpu_stat_t cs;
53	pajs	1.4	#endif
54	ats	1.11	#if defined(LINUX) \|\| defined(CYGWIN)
55	pajs	1.4	FILE *f;
56			char *line_ptr;
57			#endif
58	pajs	1.5	#ifdef FREEBSD
59			size_t size;
60			#endif
61	ats	1.9	#ifdef NETBSD
62			struct uvmexp *uvm;
63			#endif
64	pajs	1.2
65	ats	1.9	page_stats.systime = time(NULL);
66	pajs	1.2	page_stats.pages_pagein=0;
67			page_stats.pages_pageout=0;
68	pajs	1.1
69	pajs	1.4	#ifdef SOLARIS
70	pajs	1.1	if ((kc = kstat_open()) == NULL) {
71			return NULL;
72			}
73			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
74			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
75			if (kstat_read(kc, ksp, &cs) == -1) {
76			continue;
77			}
78
79	pajs	1.2	page_stats.pages_pagein+=(long long)cs.cpu_vminfo.pgpgin;
80			page_stats.pages_pageout+=(long long)cs.cpu_vminfo.pgpgout;
81			}
82
83			kstat_close(kc);
84	pajs	1.4	#endif
85	ats	1.11	#if defined(LINUX) \|\| defined(CYGWIN)
86	ats	1.10	if ((f = fopen("/proc/vmstat", "r")) != NULL) {
87			while ((line_ptr = f_read_line(f, "")) != NULL) {
88			long long value;
89
90			if (sscanf(line_ptr, "%*s %lld", &value) != 1) {
91			continue;
92			}
93
94			if (strncmp(line_ptr, "pgpgin ", 7) == 0) {
95			page_stats.pages_pagein = value;
96			} else if (strncmp(line_ptr, "pgpgout ", 8) == 0) {
97			page_stats.pages_pageout = value;
98			}
99			}
100
101			fclose(f);
102			} else if ((f = fopen("/proc/stat", "r")) != NULL) {
103			if ((line_ptr = f_read_line(f, "page")) == NULL) {
104			fclose(f);
105			return NULL;
106			}
107
108			if (sscanf(line_ptr, "page %lld %lld", &page_stats.pages_pagein, &page_stats.pages_pageout) != 2) {
109	pajs	1.12	fclose(f);
110	ats	1.10	return NULL;
111			}
112
113	pajs	1.4	fclose(f);
114	ats	1.10	} else {
115	pajs	1.4	return NULL;
116			}
117	pajs	1.5	#endif
118			#ifdef FREEBSD
119	ats	1.8	size = sizeof page_stats.pages_pagein;
120	ats	1.7	if (sysctlbyname("vm.stats.vm.v_swappgsin", &page_stats.pages_pagein, &size, NULL, 0) < 0){
121	pajs	1.5	return NULL;
122			}
123	ats	1.8	size = sizeof page_stats.pages_pageout;
124	ats	1.7	if (sysctlbyname("vm.stats.vm.v_swappgsout", &page_stats.pages_pageout, &size, NULL, 0) < 0){
125	pajs	1.5	return NULL;
126			}
127	ats	1.9	#endif
128			#ifdef NETBSD
129			if ((uvm = get_uvmexp()) == NULL) {
130			return NULL;
131			}
132			page_stats.pages_pagein = uvm->pgswapin;
133			page_stats.pages_pageout = uvm->pgswapout;
134	pajs	1.4	#endif
135	pajs	1.1
136	pajs	1.2	return &page_stats;
137	pajs	1.3	}
138
139			page_stat_t *get_page_stats_diff(){
140			page_stat_t *page_ptr;
141			static page_stat_t page_stats_diff;
142
143			if(page_stats_uninit){
144			page_ptr=get_page_stats();
145			if(page_ptr==NULL){
146			return NULL;
147			}
148			page_stats_uninit=0;
149			return page_ptr;
150			}
151
152			page_stats_diff.pages_pagein=page_stats.pages_pagein;
153			page_stats_diff.pages_pageout=page_stats.pages_pageout;
154			page_stats_diff.systime=page_stats.systime;
155
156			page_ptr=get_page_stats();
157			if(page_ptr==NULL){
158			return NULL;
159			}
160
161			page_stats_diff.pages_pagein=page_stats.pages_pagein-page_stats_diff.pages_pagein;
162			page_stats_diff.pages_pageout=page_stats.pages_pageout-page_stats_diff.pages_pageout;
163			page_stats_diff.systime=page_stats.systime-page_stats_diff.systime;
164
165			return &page_stats_diff;
166	pajs	1.1	}