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 "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


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

        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

        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:	1.4
Committed:	Fri Mar 7 14:44:38 2003 UTC (21 years, 2 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_3_4, LIBSTATGRAB_0_3_3, LIBSTATGRAB_0_3_2, LIBSTATGRAB_0_3_1, LIBSTATGRAB_0_3
Changes since 1.3:	+28 -9 lines
Log Message:	Removed getting of some data we didn't really need or use. Updated page_stats to work with linux. Fixed tools.h to compile nicely :)
#	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	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	1.1
37	pajs	1.3
38			static page_stat_t page_stats;
39			static int page_stats_uninit=1;
40
41	pajs	1.1	page_stat_t *get_page_stats(){
42	pajs	1.4	#ifdef SOLARIS
43	pajs	1.1	kstat_ctl_t *kc;
44			kstat_t *ksp;
45			cpu_stat_t cs;
46	pajs	1.4	#endif
47			#ifdef LINUX
48			FILE *f;
49			char *line_ptr;
50			#endif
51	pajs	1.2
52			page_stats.pages_pagein=0;
53			page_stats.pages_pageout=0;
54	pajs	1.1
55	pajs	1.4	#ifdef SOLARIS
56	pajs	1.1	if ((kc = kstat_open()) == NULL) {
57			return NULL;
58			}
59			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
60			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
61			if (kstat_read(kc, ksp, &cs) == -1) {
62			continue;
63			}
64
65	pajs	1.2	page_stats.pages_pagein+=(long long)cs.cpu_vminfo.pgpgin;
66			page_stats.pages_pageout+=(long long)cs.cpu_vminfo.pgpgout;
67			}
68
69			page_stats.systime=time(NULL);
70
71			kstat_close(kc);
72	pajs	1.4	#endif
73			#ifdef LINUX
74			if((f=fopen("/proc/stat", "r"))==NULL){
75			return NULL;
76			}
77			if((line_ptr=f_read_line(f, "page"))==NULL){
78			fclose(f);
79			return NULL;
80			}
81			if((sscanf(line_ptr, "page %lld %lld", &page_stats.pages_pagein, &page_stats.pages_pageout))!=2){
82			return NULL;
83			}
84			page_stats.systime=time(NULL);
85			fclose(f);
86
87			#endif
88	pajs	1.1
89	pajs	1.2	return &page_stats;
90	pajs	1.3	}
91
92			page_stat_t *get_page_stats_diff(){
93			page_stat_t *page_ptr;
94			static page_stat_t page_stats_diff;
95
96			if(page_stats_uninit){
97			page_ptr=get_page_stats();
98			if(page_ptr==NULL){
99			return NULL;
100			}
101			page_stats_uninit=0;
102			return page_ptr;
103			}
104
105			page_stats_diff.pages_pagein=page_stats.pages_pagein;
106			page_stats_diff.pages_pageout=page_stats.pages_pageout;
107			page_stats_diff.systime=page_stats.systime;
108
109			page_ptr=get_page_stats();
110			if(page_ptr==NULL){
111			return NULL;
112			}
113
114			page_stats_diff.pages_pagein=page_stats.pages_pagein-page_stats_diff.pages_pagein;
115			page_stats_diff.pages_pageout=page_stats.pages_pageout-page_stats_diff.pages_pageout;
116			page_stats_diff.systime=page_stats.systime-page_stats_diff.systime;
117
118			return &page_stats_diff;
119	pajs	1.1	}