ihost/libstatgrab/memory_stats.c

/* 
 * i-scream central monitoring system
 * 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.
 */

#include <stdio.h>
#ifdef LINUX
#include <string.h>
#endif
#ifdef SOLARIS
#include <unistd.h>
#include <kstat.h>
#endif
#ifdef FREEBSD
#include <sys/types.h>
#include <sys/sysctl.h>
#include <unistd.h>
#endif
#include "ukcprog.h"

char *get_memory_stats(){
        long long total=0;
        long long free=0;
        long long used=0;
        long long cache=0;
        char *xml_memory_stats;
#ifdef LINUX
        FILE *f;
        char *line;
        long buffers;
#endif
#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *kn;
        u_long totalmem;
        int pagesize;
#endif
#ifdef FREEBSD
#define TOTAL_MEM_NAME "hw.physmem"
#define FREE_MEM_NAME "vm.stats.vm.v_free_count"
#define INACTIVE_MEM_NAME "vm.stats.vm.v_inactive_count"
#define CACHE_MEM_NAME "vm.stats.vm.v_cache_count"
        int pagesize;
        long inactive;
        size_t size;
#endif

#ifdef LINUX
        if ((f=fopen("/proc/meminfo", "r" ))==NULL) {
                errf("Failed to open memory stats (%m)");
                return NULL;
        }
        while((line=fpgetline(f)) != NULL){
                if (((strncmp(line,"Mem:",4)) == 0)) {
                        if((sscanf(line, "%*s %ld %ld %ld %*s %ld %ld", &total, &used, &free, &buffers, &cache)) != 5){
                                errf("Failed to read memory details (%m)");
                                return NULL;
                        }
                        break;
                }
        }
        if ((fclose(f)) != 0) {
                errf("Failed to close file (%m)");
                return NULL;
        }

        cache=cache+buffers;
        used=total-(free+cache);

        total=(total/1024)/1024;
        used=(used/1024)/1024;
        free=(free/1024)/1024;
        cache=(free/1024)/1024;
#endif
#ifdef SOLARIS
        if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
                errf("Failed to get pagesize (%m)");
                return NULL;    
        }

        if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){
                errf("Failed to get total memory");
                return NULL;
        }

        if ((kc = kstat_open()) == NULL) {
                errf("kstat_open failure (%m)");
                return NULL;
        }
        if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){
                errf("kstat lookup for \"system_pages\" (%m)");
                return NULL;
        }
        if (kstat_read(kc, ksp, 0) == -1) {
                errf("Failed to read kstat details (%m)");
                return NULL;
        }
        if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){
                errf("Failed to get free memory (%m)");
                return NULL;
        }
        if((kstat_close(kc)) != 0){
                errf("Failed to close kstat control structure (%m)");
                return NULL;
        }       
        total=((totalmem*pagesize)/1024)/1024;
        free=(((kn->value.ul)*pagesize)/1024)/1024;
        used=total-free;
#endif
#ifdef FREEBSD
        if ((pagesize=getpagesize()) == -1){
                errf("Failed to get page size (%m)");
                return NULL;
        }

        if (sysctlbyname(TOTAL_MEM_NAME, NULL, &size, NULL, NULL) < 0){
                errf("sysctlbyname failed to get total memory (%m)");
                return NULL;
        }
        if (sysctlbyname(TOTAL_MEM_NAME, &total, &size, NULL, NULL) < 0){
                errf("Failed to get total memory stats (%m)");
                return NULL;
        }

        if (sysctlbyname(FREE_MEM_NAME, NULL, &size, NULL, NULL) < 0){
                errf("sysctlbyname failed to get free memory (%m)");
                return NULL;
        }
        if (sysctlbyname(FREE_MEM_NAME, &free, &size, NULL, NULL) < 0){
                errf("Failed to get free memory stats (%m)");
                return NULL;
        }

        if (sysctlbyname(INACTIVE_MEM_NAME, NULL, &size, NULL, NULL) < 0){
                errf("sysctlbyname failed to get inactive memory (%m)");
                return NULL;
        }
        if (sysctlbyname(INACTIVE_MEM_NAME, &inactive, &size, NULL, NULL) < 0){
                errf("Failed to get inactive memory stats (%m)");
                return NULL;
        }

        if (sysctlbyname(CACHE_MEM_NAME, NULL, &size, NULL, NULL) < 0){
                errf("sysctlbyname failed to get cache memory (%m)");
                return NULL;
        }
        if (sysctlbyname(CACHE_MEM_NAME, &cache, &size, NULL, NULL) < 0){
                errf("Failed to get cache memory stats (%m)");
                return NULL;
        }

        total/=(1024*1024);
        free=((free*pagesize)/(1024*1024))+((inactive*pagesize)/(1024*1024));
        cache=((cache*pagesize)/(1024*1024));
        
        /* used should also be cache+active+wired but its less effort this way :) */
        used=total-free;
          
#endif

        
        if((xml_memory_stats=strf("<memory><total>%ld</total><free>%ld</free><used>%ld</used><cache>%ld</cache></memory>", total, free, used, cache)) == NULL){
                errf("strf failed (%m)");
                return NULL;
        }
        return xml_memory_stats;
}
Revision:	1.6
Committed:	Tue May 21 16:16:41 2002 UTC (22 years, 6 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.5:	+4 -4 lines
Log Message:	Bug fixes
#	User	Rev	Content
1	tdb	1.5	/*
2			* i-scream central monitoring system
3			* Copyright (C) 2000-2002 i-scream
4			*
5			* This program is free software; you can redistribute it and/or
6			* modify it under the terms of the GNU General Public License
7			* as published by the Free Software Foundation; either version 2
8			* of the License, or (at your option) any later version.
9			*
10			* This program is distributed in the hope that it will be useful,
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			* GNU General Public License for more details.
14			*
15			* You should have received a copy of the GNU General Public License
16			* along with this program; if not, write to the Free Software
17			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18			*/
19
20	pajs	1.1	#include <stdio.h>
21	pajs	1.2	#ifdef LINUX
22	pajs	1.1	#include <string.h>
23	pajs	1.2	#endif
24			#ifdef SOLARIS
25			#include <unistd.h>
26			#include <kstat.h>
27			#endif
28			#ifdef FREEBSD
29			#include <sys/types.h>
30			#include <sys/sysctl.h>
31			#include <unistd.h>
32			#endif
33	tdb	1.3	#include "ukcprog.h"
34	pajs	1.1
35			char *get_memory_stats(){
36	pajs	1.6	long long total=0;
37			long long free=0;
38			long long used=0;
39			long long cache=0;
40	pajs	1.1	char *xml_memory_stats;
41			#ifdef LINUX
42			FILE *f;
43			char *line;
44			long buffers;
45			#endif
46	pajs	1.2	#ifdef SOLARIS
47			kstat_ctl_t *kc;
48			kstat_t *ksp;
49			kstat_named_t *kn;
50			u_long totalmem;
51			int pagesize;
52			#endif
53			#ifdef FREEBSD
54			#define TOTAL_MEM_NAME "hw.physmem"
55			#define FREE_MEM_NAME "vm.stats.vm.v_free_count"
56			#define INACTIVE_MEM_NAME "vm.stats.vm.v_inactive_count"
57			#define CACHE_MEM_NAME "vm.stats.vm.v_cache_count"
58			int pagesize;
59			long inactive;
60			size_t size;
61			#endif
62	pajs	1.1
63			#ifdef LINUX
64			if ((f=fopen("/proc/meminfo", "r" ))==NULL) {
65			errf("Failed to open memory stats (%m)");
66			return NULL;
67			}
68			while((line=fpgetline(f)) != NULL){
69			if (((strncmp(line,"Mem:",4)) == 0)) {
70			if((sscanf(line, "%s %ld %ld %ld %s %ld %ld", &total, &used, &free, &buffers, &cache)) != 5){
71			errf("Failed to read memory details (%m)");
72			return NULL;
73			}
74			break;
75			}
76			}
77			if ((fclose(f)) != 0) {
78			errf("Failed to close file (%m)");
79			return NULL;
80			}
81
82			cache=cache+buffers;
83			used=total-(free+cache);
84
85			total=(total/1024)/1024;
86			used=(used/1024)/1024;
87			free=(free/1024)/1024;
88			cache=(free/1024)/1024;
89			#endif
90	pajs	1.2	#ifdef SOLARIS
91			if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
92			errf("Failed to get pagesize (%m)");
93			return NULL;
94			}
95
96			if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){
97			errf("Failed to get total memory");
98			return NULL;
99			}
100
101			if ((kc = kstat_open()) == NULL) {
102			errf("kstat_open failure (%m)");
103			return NULL;
104			}
105			if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){
106			errf("kstat lookup for \"system_pages\" (%m)");
107			return NULL;
108			}
109			if (kstat_read(kc, ksp, 0) == -1) {
110			errf("Failed to read kstat details (%m)");
111			return NULL;
112			}
113			if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){
114			errf("Failed to get free memory (%m)");
115			return NULL;
116			}
117	pajs	1.4	if((kstat_close(kc)) != 0){
118			errf("Failed to close kstat control structure (%m)");
119			return NULL;
120			}
121	pajs	1.2	total=((totalmem*pagesize)/1024)/1024;
122			free=(((kn->value.ul)*pagesize)/1024)/1024;
123			used=total-free;
124			#endif
125			#ifdef FREEBSD
126			if ((pagesize=getpagesize()) == -1){
127			errf("Failed to get page size (%m)");
128			return NULL;
129			}
130
131			if (sysctlbyname(TOTAL_MEM_NAME, NULL, &size, NULL, NULL) < 0){
132			errf("sysctlbyname failed to get total memory (%m)");
133			return NULL;
134			}
135			if (sysctlbyname(TOTAL_MEM_NAME, &total, &size, NULL, NULL) < 0){
136			errf("Failed to get total memory stats (%m)");
137			return NULL;
138			}
139
140			if (sysctlbyname(FREE_MEM_NAME, NULL, &size, NULL, NULL) < 0){
141			errf("sysctlbyname failed to get free memory (%m)");
142			return NULL;
143			}
144			if (sysctlbyname(FREE_MEM_NAME, &free, &size, NULL, NULL) < 0){
145			errf("Failed to get free memory stats (%m)");
146			return NULL;
147			}
148
149			if (sysctlbyname(INACTIVE_MEM_NAME, NULL, &size, NULL, NULL) < 0){
150			errf("sysctlbyname failed to get inactive memory (%m)");
151			return NULL;
152			}
153			if (sysctlbyname(INACTIVE_MEM_NAME, &inactive, &size, NULL, NULL) < 0){
154			errf("Failed to get inactive memory stats (%m)");
155			return NULL;
156			}
157
158			if (sysctlbyname(CACHE_MEM_NAME, NULL, &size, NULL, NULL) < 0){
159			errf("sysctlbyname failed to get cache memory (%m)");
160			return NULL;
161			}
162			if (sysctlbyname(CACHE_MEM_NAME, &cache, &size, NULL, NULL) < 0){
163			errf("Failed to get cache memory stats (%m)");
164			return NULL;
165			}
166
167			total/=(1024*1024);
168			free=((freepagesize)/(10241024))+((inactivepagesize)/(10241024));
169			cache=((cachepagesize)/(10241024));
170
171			/* used should also be cache+active+wired but its less effort this way :) */
172			used=total-free;
173
174			#endif
175
176	pajs	1.1
177			if((xml_memory_stats=strf("<memory><total>%ld</total><free>%ld</free><used>%ld</used><cache>%ld</cache></memory>", total, free, used, cache)) == NULL){
178			errf("strf failed (%m)");
179			return NULL;
180			}
181	pajs	1.2	return xml_memory_stats;
182	pajs	1.1	}