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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 1.3 by tdb, Thu Feb 20 13:19:52 2003 UTC vs.
Revision 1.14 by ats, Mon Oct 20 18:13:35 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	<	#ifdef LINUX
28	<	#include <string.h>
29	<	#endif
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>
#	Line 48 | Line 49 | mem_stat_t *get_memory_stats(){
49		long totalmem;
50		int pagesize;
51		#endif
52	+	#ifdef LINUX
53	+	char *line_ptr;
54	+	FILE *f;
55	+	#endif
56	+	#ifdef FREEBSD
57	+	int mib[2];
58	+	u_long physmem;
59	+	size_t size;
60	+	u_int free_count;
61	+	u_int cache_count;
62	+	u_int inactive_count;
63	+	int pagesize;
64	+	#endif
65	+	#ifdef NETBSD
66	+	struct uvmexp *uvm;
67	+	#endif
68
69		#ifdef SOLARIS
70		if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
#	Line 77 | Line 94 | mem_stat_t *get_memory_stats(){
94		mem_stat.used = mem_stat.total - mem_stat.free;
95		#endif
96
97	<	return &mem_stat;
97	>	#ifdef LINUX
98	>	f=fopen("/proc/meminfo", "r");
99	>	if(f==NULL){
100	>	return NULL;
101	>	}
102
103	+	if((line_ptr=f_read_line(f, "Mem:"))==NULL){
104	+	fclose(f);
105	+	return NULL;
106	+	}
107	+
108	+	fclose(f);
109	+
110	+	/* Linux actually stores this as a unsigned long long, but
111	+	* our structures are just long longs. This shouldn't be a
112	+	* problem for sometime yet :)
113	+	*/
114	+	if((sscanf(line_ptr,"Mem:  %lld %lld %lld %*d %*d %lld", \
115	+	&mem_stat.total, \
116	+	&mem_stat.used, \
117	+	&mem_stat.free, \
118	+	&mem_stat.cache))!=4){
119	+	return NULL;
120	+	}
121	+
122	+	#endif
123	+
124	+	#ifdef FREEBSD
125	+	/* Returns bytes */
126	+	mib[0] = CTL_HW;
127	+	mib[1] = HW_PHYSMEM;
128	+	size = sizeof physmem;
129	+	if (sysctl(mib, 2, &physmem, &size, NULL, 0) < 0) {
130	+	return NULL;
131	+	}
132	+	mem_stat.total = physmem;
133	+
134	+	/*returns pages*/
135	+	size = sizeof free_count;
136	+	if (sysctlbyname("vm.stats.vm.v_free_count", &free_count, &size, NULL, 0) < 0){
137	+	return NULL;
138	+	}
139	+
140	+	size = sizeof inactive_count;
141	+	if (sysctlbyname("vm.stats.vm.v_inactive_count", &inactive_count , &size, NULL, 0) < 0){
142	+	return NULL;
143	+	}
144	+
145	+	size = sizeof cache_count;
146	+	if (sysctlbyname("vm.stats.vm.v_cache_count", &cache_count, &size, NULL, 0) < 0){
147	+	return NULL;
148	+	}
149	+
150	+	/* Because all the vm.stats returns pages, I need to get the page size.
151	+	* After that I then need to multiple the anything that used vm.stats to
152	+	* get the system statistics by pagesize
153	+	*/
154	+	if ((pagesize=getpagesize()) == -1){
155	+	return NULL;
156	+	}
157	+
158	+	mem_stat.cache=cache_count*pagesize;
159	+
160	+	/* Of couse nothing is ever that simple :) And I have inactive pages to
161	+	* deal with too. So I'm going to add them to free memory :)
162	+	*/
163	+	mem_stat.free=(free_count*pagesize)+(inactive_count*pagesize);
164	+	mem_stat.used=physmem-mem_stat.free;
165	+	#endif
166	+
167	+	#ifdef NETBSD
168	+	if ((uvm = get_uvmexp()) == NULL) {
169	+	return NULL;
170	+	}
171	+	mem_stat.total = uvm->pagesize * uvm->npages;
172	+	mem_stat.cache = uvm->pagesize * (uvm->filepages + uvm->execpages);
173	+	mem_stat.free = uvm->pagesize * (uvm->free + uvm->inactive);
174	+	mem_stat.used = mem_stat.total - mem_stat.free;
175	+	#endif
176	+
177	+	return &mem_stat;
178		}

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