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root/i-scream/projects/libstatgrab/src/libstatgrab/memory_stats.c

Comparing projects/libstatgrab/src/libstatgrab/memory_stats.c (file contents):
Revision 1.4 by tdb, Fri Feb 28 22:59:35 2003 UTC vs.
Revision 1.15 by ats, Fri Oct 24 17:03:20 2003 UTC

#	Line 1 | Line 1
1		/*
2		* i-scream central monitoring system
3	<	* http://www.i-scream.org.uk
4	<	* Copyright (C) 2000-2002 i-scream
3	>	* http://www.i-scream.org
4	>	* Copyright (C) 2000-2003 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
#	Line 22 | Line 22
22		#include "config.h"
23		#endif
24
25	–	#include <stdio.h>
25		#include "statgrab.h"
26	+	#include "tools.h"
27		#ifdef SOLARIS
28		#include <unistd.h>
29		#include <kstat.h>
30		#endif
31	+	#ifdef LINUX
32	+	#include <stdio.h>
33	+	#include <string.h>
34	+	#endif
35	+	#ifdef FREEBSD
36	+	#include <sys/types.h>
37	+	#include <sys/sysctl.h>
38	+	#include <unistd.h>
39	+	#endif
40
41		mem_stat_t *get_memory_stats(){
42
#	Line 40 | Line 49 | mem_stat_t *get_memory_stats(){
49		long totalmem;
50		int pagesize;
51		#endif
52	+	#ifdef LINUX
53	+	char *line_ptr;
54	+	unsigned long long value;
55	+	FILE *f;
56	+	#endif
57	+	#ifdef FREEBSD
58	+	int mib[2];
59	+	u_long physmem;
60	+	size_t size;
61	+	u_int free_count;
62	+	u_int cache_count;
63	+	u_int inactive_count;
64	+	int pagesize;
65	+	#endif
66	+	#ifdef NETBSD
67	+	struct uvmexp *uvm;
68	+	#endif
69
70		#ifdef SOLARIS
71		if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
#	Line 69 | Line 95 | mem_stat_t *get_memory_stats(){
95		mem_stat.used = mem_stat.total - mem_stat.free;
96		#endif
97
98	<	return &mem_stat;
98	>	#ifdef LINUX
99	>	f = fopen("/proc/meminfo", "r");
100	>	if (f == NULL) {
101	>	return NULL;
102	>	}
103
104	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
105	+	if (sscanf(line_ptr, "%*s %lld kB", &value) != 2) {
106	+	continue;
107	+	}
108	+	value *= 1024;
109	+
110	+	if (strncmp(line_ptr, "MemTotal:", 9) == 0) {
111	+	mem_stat.total = value;
112	+	} else if (strncmp(line_ptr, "MemFree:", 8) == 0) {
113	+	mem_stat.free = value;
114	+	} else if (strncmp(line_ptr, "Cached:", 7) == 0) {
115	+	mem_stat.cache = value;
116	+	}
117	+	}
118	+
119	+	fclose(f);
120	+	mem_stat.used = mem_stat.total - mem_stat.free;
121	+	#endif
122	+
123	+	#ifdef FREEBSD
124	+	/* Returns bytes */
125	+	mib[0] = CTL_HW;
126	+	mib[1] = HW_PHYSMEM;
127	+	size = sizeof physmem;
128	+	if (sysctl(mib, 2, &physmem, &size, NULL, 0) < 0) {
129	+	return NULL;
130	+	}
131	+	mem_stat.total = physmem;
132	+
133	+	/*returns pages*/
134	+	size = sizeof free_count;
135	+	if (sysctlbyname("vm.stats.vm.v_free_count", &free_count, &size, NULL, 0) < 0){
136	+	return NULL;
137	+	}
138	+
139	+	size = sizeof inactive_count;
140	+	if (sysctlbyname("vm.stats.vm.v_inactive_count", &inactive_count , &size, NULL, 0) < 0){
141	+	return NULL;
142	+	}
143	+
144	+	size = sizeof cache_count;
145	+	if (sysctlbyname("vm.stats.vm.v_cache_count", &cache_count, &size, NULL, 0) < 0){
146	+	return NULL;
147	+	}
148	+
149	+	/* Because all the vm.stats returns pages, I need to get the page size.
150	+	* After that I then need to multiple the anything that used vm.stats to
151	+	* get the system statistics by pagesize
152	+	*/
153	+	if ((pagesize=getpagesize()) == -1){
154	+	return NULL;
155	+	}
156	+
157	+	mem_stat.cache=cache_count*pagesize;
158	+
159	+	/* Of couse nothing is ever that simple :) And I have inactive pages to
160	+	* deal with too. So I'm going to add them to free memory :)
161	+	*/
162	+	mem_stat.free=(free_count*pagesize)+(inactive_count*pagesize);
163	+	mem_stat.used=physmem-mem_stat.free;
164	+	#endif
165	+
166	+	#ifdef NETBSD
167	+	if ((uvm = get_uvmexp()) == NULL) {
168	+	return NULL;
169	+	}
170	+	mem_stat.total = uvm->pagesize * uvm->npages;
171	+	mem_stat.cache = uvm->pagesize * (uvm->filepages + uvm->execpages);
172	+	mem_stat.free = uvm->pagesize * (uvm->free + uvm->inactive);
173	+	mem_stat.used = mem_stat.total - mem_stat.free;
174	+	#endif
175	+
176	+	return &mem_stat;
177		}

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