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root/i-scream/projects/libstatgrab/src/libstatgrab/page_stats.c
Revision: 1.22
Committed: Sun Jul 18 21:30:11 2004 UTC (19 years, 10 months ago) by ats
Content type: text/plain
Branch: MAIN
CVS Tags: LIBSTATGRAB_0_12, LIBSTATGRAB_0_11_1, LIBSTATGRAB_0_11, LIBSTATGRAB_0_10_3, LIBSTATGRAB_0_10_2, LIBSTATGRAB_0_10_1
Changes since 1.21: +6 -4 lines
Log Message: 
Use sg_set_error_with_errno whenever errno's valid.
Change the one user of SG_ERROR_ENOENT to SG_ERROR_SYSCTL instead (since
that's what it should have been).

File Contents

# User Rev Content
1 tdb 1.13 /*
2 tdb 1.19 * i-scream libstatgrab
3 tdb 1.6 * http://www.i-scream.org
4 tdb 1.13 * Copyright (C) 2000-2004 i-scream
5 pajs 1.1 *
6 tdb 1.13 * This library is free software; you can redistribute it and/or
7     * modify it under the terms of the GNU Lesser General Public
8     * License as published by the Free Software Foundation; either
9     * version 2.1 of the License, or (at your option) any later version.
10 pajs 1.1 *
11 tdb 1.13 * This library is distributed in the hope that it will be useful,
12 pajs 1.1 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 tdb 1.13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14     * Lesser General Public License for more details.
15 pajs 1.1 *
16 tdb 1.13 * You should have received a copy of the GNU Lesser General Public
17     * License along with this library; if not, write to the Free Software
18     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19     * 02111-1307 USA
20 tdb 1.14 *
21 ats 1.22 * $Id: page_stats.c,v 1.21 2004/04/07 21:08:40 tdb Exp $
22 pajs 1.1 */
23    
24     #ifdef HAVE_CONFIG_H
25     #include "config.h"
26     #endif
27    
28 pajs 1.2 #include "statgrab.h"
29 ats 1.9 #include "tools.h"
30 pajs 1.4 #include <time.h>
31 pajs 1.1 #ifdef SOLARIS
32     #include <kstat.h>
33     #include <sys/sysinfo.h>
34 pajs 1.2 #include <string.h>
35 pajs 1.1 #endif
36 ats 1.11 #if defined(LINUX) || defined(CYGWIN)
37 pajs 1.4 #include <stdio.h>
38 ats 1.10 #include <string.h>
39 pajs 1.4 #endif
40 tdb 1.17 #if defined(FREEBSD) || defined(DFBSD)
41 pajs 1.5 #include <sys/types.h>
42     #include <sys/sysctl.h>
43     #endif
44 tdb 1.16 #if defined(NETBSD) || defined(OPENBSD)
45 tdb 1.15 #include <sys/param.h>
46     #include <uvm/uvm.h>
47     #endif
48 pajs 1.3
49 ats 1.18 static sg_page_stats page_stats;
50 pajs 1.3 static int page_stats_uninit=1;
51    
52 ats 1.18 sg_page_stats *sg_get_page_stats(){
53 pajs 1.4 #ifdef SOLARIS
54 tdb 1.20 kstat_ctl_t *kc;
55     kstat_t *ksp;
56     cpu_stat_t cs;
57 pajs 1.4 #endif
58 ats 1.11 #if defined(LINUX) || defined(CYGWIN)
59 pajs 1.4 FILE *f;
60     char *line_ptr;
61     #endif
62 tdb 1.17 #if defined(FREEBSD) || defined(DFBSD)
63 pajs 1.5 size_t size;
64     #endif
65 tdb 1.15 #if defined(NETBSD) || defined(OPENBSD)
66 ats 1.9 struct uvmexp *uvm;
67     #endif
68 pajs 1.2
69 ats 1.9 page_stats.systime = time(NULL);
70 tdb 1.20 page_stats.pages_pagein=0;
71     page_stats.pages_pageout=0;
72 pajs 1.1
73 pajs 1.4 #ifdef SOLARIS
74 tdb 1.20 if ((kc = kstat_open()) == NULL) {
75 tdb 1.21 sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
76 tdb 1.20 return NULL;
77     }
78     for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
79     if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
80     if (kstat_read(kc, ksp, &cs) == -1) {
81     continue;
82     }
83 pajs 1.1
84 pajs 1.2 page_stats.pages_pagein+=(long long)cs.cpu_vminfo.pgpgin;
85     page_stats.pages_pageout+=(long long)cs.cpu_vminfo.pgpgout;
86     }
87    
88     kstat_close(kc);
89 pajs 1.4 #endif
90 ats 1.11 #if defined(LINUX) || defined(CYGWIN)
91 ats 1.10 if ((f = fopen("/proc/vmstat", "r")) != NULL) {
92 ats 1.18 while ((line_ptr = sg_f_read_line(f, "")) != NULL) {
93 ats 1.10 long long value;
94    
95     if (sscanf(line_ptr, "%*s %lld", &value) != 1) {
96     continue;
97     }
98    
99     if (strncmp(line_ptr, "pgpgin ", 7) == 0) {
100     page_stats.pages_pagein = value;
101     } else if (strncmp(line_ptr, "pgpgout ", 8) == 0) {
102     page_stats.pages_pageout = value;
103     }
104     }
105    
106     fclose(f);
107     } else if ((f = fopen("/proc/stat", "r")) != NULL) {
108 ats 1.18 if ((line_ptr = sg_f_read_line(f, "page")) == NULL) {
109 tdb 1.21 sg_set_error(SG_ERROR_PARSE, "page");
110 ats 1.10 fclose(f);
111     return NULL;
112     }
113    
114     if (sscanf(line_ptr, "page %lld %lld", &page_stats.pages_pagein, &page_stats.pages_pageout) != 2) {
115 tdb 1.21 sg_set_error(SG_ERROR_PARSE, "page");
116 pajs 1.12 fclose(f);
117 ats 1.10 return NULL;
118     }
119    
120 pajs 1.4 fclose(f);
121 ats 1.10 } else {
122 ats 1.22 sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/stat");
123 pajs 1.4 return NULL;
124     }
125 pajs 1.5 #endif
126 tdb 1.17 #if defined(FREEBSD) || defined(DFBSD)
127 ats 1.8 size = sizeof page_stats.pages_pagein;
128 tdb 1.20 if (sysctlbyname("vm.stats.vm.v_swappgsin", &page_stats.pages_pagein, &size, NULL, 0) < 0){
129 ats 1.22 sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME,
130     "vm.stats.vm.v_swappgsin");
131 tdb 1.20 return NULL;
132     }
133 ats 1.8 size = sizeof page_stats.pages_pageout;
134 tdb 1.20 if (sysctlbyname("vm.stats.vm.v_swappgsout", &page_stats.pages_pageout, &size, NULL, 0) < 0){
135 ats 1.22 sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME,
136     "vm.stats.vm.v_swappgsout");
137 tdb 1.20 return NULL;
138     }
139 ats 1.9 #endif
140 tdb 1.16 #if defined(NETBSD) || defined(OPENBSD)
141 ats 1.18 if ((uvm = sg_get_uvmexp()) == NULL) {
142 ats 1.9 return NULL;
143     }
144 tdb 1.15
145 ats 1.9 page_stats.pages_pagein = uvm->pgswapin;
146     page_stats.pages_pageout = uvm->pgswapout;
147 pajs 1.4 #endif
148 pajs 1.1
149 pajs 1.2 return &page_stats;
150 pajs 1.3 }
151    
152 ats 1.18 sg_page_stats *sg_get_page_stats_diff(){
153     sg_page_stats *page_ptr;
154     static sg_page_stats page_stats_diff;
155 pajs 1.3
156     if(page_stats_uninit){
157 ats 1.18 page_ptr=sg_get_page_stats();
158 pajs 1.3 if(page_ptr==NULL){
159     return NULL;
160     }
161     page_stats_uninit=0;
162     return page_ptr;
163     }
164    
165     page_stats_diff.pages_pagein=page_stats.pages_pagein;
166     page_stats_diff.pages_pageout=page_stats.pages_pageout;
167     page_stats_diff.systime=page_stats.systime;
168    
169 ats 1.18 page_ptr=sg_get_page_stats();
170 pajs 1.3 if(page_ptr==NULL){
171     return NULL;
172     }
173    
174 tdb 1.20 page_stats_diff.pages_pagein=page_stats.pages_pagein-page_stats_diff.pages_pagein;
175     page_stats_diff.pages_pageout=page_stats.pages_pageout-page_stats_diff.pages_pageout;
176     page_stats_diff.systime=page_stats.systime-page_stats_diff.systime;
177 pajs 1.3
178     return &page_stats_diff;
179 pajs 1.1 }