1 /**
2 * collectd - src/load.c
3 * Copyright (C) 2005-2008 Florian octo Forster
4 * Copyright (C) 2009 Manuel Sanmartin
5 * Copyright (C) 2013 Vedran Bartonicek
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; only version 2 of the License is applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at collectd.org>
22 * Manuel Sanmartin
23 * Vedran Bartonicek <vbartoni at gmail.com>
24 **/
26 #define _DEFAULT_SOURCE
27 #define _BSD_SOURCE
29 #include "collectd.h"
30 #include "common.h"
31 #include "plugin.h"
33 #include <unistd.h>
35 #ifdef HAVE_SYS_LOADAVG_H
36 #include <sys/loadavg.h>
37 #endif
39 #if HAVE_STATGRAB_H
40 # include <statgrab.h>
41 #endif
43 #ifdef HAVE_GETLOADAVG
44 #if !defined(LOADAVG_1MIN) || !defined(LOADAVG_5MIN) || !defined(LOADAVG_15MIN)
45 #define LOADAVG_1MIN 0
46 #define LOADAVG_5MIN 1
47 #define LOADAVG_15MIN 2
48 #endif
49 #endif /* defined(HAVE_GETLOADAVG) */
51 #ifdef HAVE_PERFSTAT
52 # include <sys/proc.h> /* AIX 5 */
53 # include <sys/protosw.h>
54 # include <libperfstat.h>
55 #endif /* HAVE_PERFSTAT */
57 static _Bool report_relative_load = 0;
59 static const char *config_keys[] =
60 {
61 "ReportRelative"
62 };
63 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
65 static int load_config (const char *key, const char *value)
66 {
67 if (strcasecmp (key, "ReportRelative") == 0)
68 #ifdef _SC_NPROCESSORS_ONLN
69 report_relative_load = IS_TRUE (value) ? 1 : 0;
70 #else
71 WARNING ("load plugin: The \"ReportRelative\" configuration "
72 "is not available, because I can't determine the "
73 "number of CPUS on this system. Sorry.");
74 #endif
75 return (-1);
77 }
78 static void load_submit (gauge_t snum, gauge_t mnum, gauge_t lnum)
79 {
80 value_t values[3];
81 value_list_t vl = VALUE_LIST_INIT;
82 int cores = 0;
83 char errbuf[1024];
85 #ifdef _SC_NPROCESSORS_ONLN
86 if (report_relative_load) {
87 if ((cores = sysconf(_SC_NPROCESSORS_ONLN)) < 1) {
88 WARNING ("load: sysconf failed : %s",
89 sstrerror (errno, errbuf, sizeof (errbuf)));
90 }
91 }
92 #endif
93 if (cores > 0) {
94 snum /= cores;
95 mnum /= cores;
96 lnum /= cores;
97 }
99 values[0].gauge = snum;
100 values[1].gauge = mnum;
101 values[2].gauge = lnum;
103 vl.values = values;
104 vl.values_len = STATIC_ARRAY_SIZE (values);
106 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
107 sstrncpy (vl.plugin, "load", sizeof (vl.plugin));
108 sstrncpy (vl.type, "load", sizeof (vl.type));
110 if (cores > 0) {
111 sstrncpy(vl.type_instance, "relative",
112 sizeof (vl.type_instance));
113 }
115 plugin_dispatch_values (&vl);
116 }
118 static int load_read (void)
119 {
120 #if defined(HAVE_GETLOADAVG)
121 double load[3];
123 if (getloadavg (load, 3) == 3)
124 load_submit (load[LOADAVG_1MIN], load[LOADAVG_5MIN], load[LOADAVG_15MIN]);
125 else
126 {
127 char errbuf[1024];
128 WARNING ("load: getloadavg failed: %s",
129 sstrerror (errno, errbuf, sizeof (errbuf)));
130 }
131 /* #endif HAVE_GETLOADAVG */
133 #elif defined(KERNEL_LINUX)
134 gauge_t snum, mnum, lnum;
135 FILE *loadavg;
136 char buffer[16];
138 char *fields[8];
139 int numfields;
141 if ((loadavg = fopen ("/proc/loadavg", "r")) == NULL)
142 {
143 char errbuf[1024];
144 WARNING ("load: fopen: %s",
145 sstrerror (errno, errbuf, sizeof (errbuf)));
146 return (-1);
147 }
149 if (fgets (buffer, 16, loadavg) == NULL)
150 {
151 char errbuf[1024];
152 WARNING ("load: fgets: %s",
153 sstrerror (errno, errbuf, sizeof (errbuf)));
154 fclose (loadavg);
155 return (-1);
156 }
158 if (fclose (loadavg))
159 {
160 char errbuf[1024];
161 WARNING ("load: fclose: %s",
162 sstrerror (errno, errbuf, sizeof (errbuf)));
163 }
165 numfields = strsplit (buffer, fields, 8);
167 if (numfields < 3)
168 return (-1);
170 snum = atof (fields[0]);
171 mnum = atof (fields[1]);
172 lnum = atof (fields[2]);
174 load_submit(snum, mnum, lnum);
175 /* #endif KERNEL_LINUX */
177 #elif HAVE_LIBSTATGRAB
178 gauge_t snum, mnum, lnum;
179 sg_load_stats *ls;
181 if ((ls = sg_get_load_stats ()) == NULL)
182 return;
184 snum = ls->min1;
185 mnum = ls->min5;
186 lnum = ls->min15;
187 load_submit(snum, mnum, lnum);
188 /* #endif HAVE_LIBSTATGRAB */
190 #elif HAVE_PERFSTAT
191 gauge_t snum, mnum, lnum;
192 perfstat_cpu_total_t cputotal;
194 if (perfstat_cpu_total(NULL, &cputotal, sizeof(perfstat_cpu_total_t), 1) < 0)
195 {
196 char errbuf[1024];
197 WARNING ("load: perfstat_cpu : %s",
198 sstrerror (errno, errbuf, sizeof (errbuf)));
199 return (-1);
200 }
202 snum = (float)cputotal.loadavg[0]/(float)(1<<SBITS);
203 mnum = (float)cputotal.loadavg[1]/(float)(1<<SBITS);
204 lnum = (float)cputotal.loadavg[2]/(float)(1<<SBITS);
205 load_submit(snum, mnum, lnum);
206 /* #endif HAVE_PERFSTAT */
208 #else
209 # error "No applicable input method."
210 #endif
212 return (0);
213 }
215 void module_register (void)
216 {
217 plugin_register_config ("load", load_config, config_keys, config_keys_num);
218 plugin_register_read ("load", load_read);
219 } /* void module_register */