src/libstatgrab/page_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 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 <stdio.h>
#include "statgrab.h"
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#include <string.h>
#endif


static page_stat_t page_stats;
static int page_stats_uninit=1;

page_stat_t *get_page_stats(){
        kstat_ctl_t *kc;
        kstat_t *ksp;
        cpu_stat_t cs;

        page_stats.num_pagein=0;
        page_stats.num_pageout=0;
        page_stats.pages_pagein=0;
        page_stats.pages_pageout=0;

        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.num_pagein+=(long long)cs.cpu_vminfo.pgin;
                page_stats.num_pageout+=(long long)cs.cpu_vminfo.pgout;
                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);

        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.num_pagein=page_stats.num_pagein;
        page_stats_diff.num_pageout=page_stats.num_pageout;
        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.num_pagein=page_stats.num_pagein-page_stats_diff.num_pagein;
        page_stats_diff.num_pageout=page_stats.num_pageout-page_stats_diff.num_pageout;
        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:	1.3
Committed:	Wed Feb 19 00:25:36 2003 UTC (21 years, 2 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_2
Changes since 1.2:	+37 -1 lines
Log Message:	Added get_page_stats_diff() which returns the number of pages in/out etc since last time it was called, and the time difference since last time it was called. This makes it very easy for a host to know how many pages averaged over a period of time.
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3			* http://www.i-scream.org.uk
4			* Copyright (C) 2000-2002 i-scream
5			*
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 <stdio.h>
26	pajs	1.2	#include "statgrab.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
33	pajs	1.3
34			static page_stat_t page_stats;
35			static int page_stats_uninit=1;
36
37	pajs	1.1	page_stat_t *get_page_stats(){
38			kstat_ctl_t *kc;
39			kstat_t *ksp;
40			cpu_stat_t cs;
41	pajs	1.2
42			page_stats.num_pagein=0;
43			page_stats.num_pageout=0;
44			page_stats.pages_pagein=0;
45			page_stats.pages_pageout=0;
46	pajs	1.1
47			if ((kc = kstat_open()) == NULL) {
48			return NULL;
49			}
50			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
51			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
52			if (kstat_read(kc, ksp, &cs) == -1) {
53			continue;
54			}
55
56	pajs	1.2	page_stats.num_pagein+=(long long)cs.cpu_vminfo.pgin;
57			page_stats.num_pageout+=(long long)cs.cpu_vminfo.pgout;
58			page_stats.pages_pagein+=(long long)cs.cpu_vminfo.pgpgin;
59			page_stats.pages_pageout+=(long long)cs.cpu_vminfo.pgpgout;
60			}
61
62			page_stats.systime=time(NULL);
63
64			kstat_close(kc);
65	pajs	1.1
66	pajs	1.2	return &page_stats;
67	pajs	1.3	}
68
69			page_stat_t *get_page_stats_diff(){
70			page_stat_t *page_ptr;
71			static page_stat_t page_stats_diff;
72
73			if(page_stats_uninit){
74			page_ptr=get_page_stats();
75			if(page_ptr==NULL){
76			return NULL;
77			}
78			page_stats_uninit=0;
79			return page_ptr;
80			}
81
82			page_stats_diff.num_pagein=page_stats.num_pagein;
83			page_stats_diff.num_pageout=page_stats.num_pageout;
84			page_stats_diff.pages_pagein=page_stats.pages_pagein;
85			page_stats_diff.pages_pageout=page_stats.pages_pageout;
86			page_stats_diff.systime=page_stats.systime;
87
88			page_ptr=get_page_stats();
89			if(page_ptr==NULL){
90			return NULL;
91			}
92
93			page_stats_diff.num_pagein=page_stats.num_pagein-page_stats_diff.num_pagein;
94			page_stats_diff.num_pageout=page_stats.num_pageout-page_stats_diff.num_pageout;
95			page_stats_diff.pages_pagein=page_stats.pages_pagein-page_stats_diff.pages_pagein;
96			page_stats_diff.pages_pageout=page_stats.pages_pageout-page_stats_diff.pages_pageout;
97			page_stats_diff.systime=page_stats.systime-page_stats_diff.systime;
98
99			return &page_stats_diff;
100	pajs	1.1	}