1 /**
2 * collectd - src/load.c
3 * Copyright (C) 2005,2006 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 **/
23 #include "collectd.h"
24 #include "common.h"
25 #include "plugin.h"
27 #define MODULE_NAME "load"
29 #if defined(HAVE_GETLOADAVG) || defined(KERNEL_LINUX) || defined(HAVE_LIBSTATGRAB)
30 # define LOAD_HAVE_READ 1
31 #else
32 # define LOAD_HAVE_READ 0
33 #endif
35 #ifdef HAVE_SYS_LOADAVG_H
36 #include <sys/loadavg.h>
37 #endif
39 #ifdef HAVE_GETLOADAVG
40 #if !defined(LOADAVG_1MIN) || !defined(LOADAVG_5MIN) || !defined(LOADAVG_15MIN)
41 #define LOADAVG_1MIN 0
42 #define LOADAVG_5MIN 1
43 #define LOADAVG_15MIN 2
44 #endif
45 #endif /* defined(HAVE_GETLOADAVG) */
47 static data_source_t dsrc[3] =
48 {
49 {"shortterm", DS_TYPE_GAUGE, 0.0, 100.0},
50 {"midterm", DS_TYPE_GAUGE, 0.0, 100.0},
51 {"longterm", DS_TYPE_GAUGE, 0.0, 100.0}
52 };
54 static data_set_t ds =
55 {
56 "load", 3, dsrc
57 };
59 #if LOAD_HAVE_READ
60 static void load_submit (double snum, double mnum, double lnum)
61 {
62 value_t values[3];
63 value_list_t vl = VALUE_LIST_INIT;
65 values[0].gauge = snum;
66 values[1].gauge = mnum;
67 values[2].gauge = lnum;
69 vl.values = values;
70 vl.values_len = 3;
71 vl.time = time (NULL);
72 strcpy (vl.host, hostname);
73 strcpy (vl.plugin, "load");
74 strcpy (vl.plugin_instance, "");
75 strcpy (vl.type_instance, "");
77 plugin_dispatch_values ("load", &vl);
78 }
80 static int load_read (void)
81 {
82 #if defined(HAVE_GETLOADAVG)
83 double load[3];
85 if (getloadavg (load, 3) == 3)
86 load_submit (load[LOADAVG_1MIN], load[LOADAVG_5MIN], load[LOADAVG_15MIN]);
87 else
88 syslog (LOG_WARNING, "load: getloadavg failed: %s", strerror (errno));
89 /* #endif HAVE_GETLOADAVG */
91 #elif defined(KERNEL_LINUX)
92 double snum, mnum, lnum;
93 FILE *loadavg;
94 char buffer[16];
96 char *fields[8];
97 int numfields;
99 if ((loadavg = fopen ("/proc/loadavg", "r")) == NULL)
100 {
101 syslog (LOG_WARNING, "load: fopen: %s", strerror (errno));
102 return;
103 }
105 if (fgets (buffer, 16, loadavg) == NULL)
106 {
107 syslog (LOG_WARNING, "load: fgets: %s", strerror (errno));
108 fclose (loadavg);
109 return;
110 }
112 if (fclose (loadavg))
113 syslog (LOG_WARNING, "load: fclose: %s", strerror (errno));
115 numfields = strsplit (buffer, fields, 8);
117 if (numfields < 3)
118 return;
120 snum = atof (fields[0]);
121 mnum = atof (fields[1]);
122 lnum = atof (fields[2]);
124 load_submit (snum, mnum, lnum);
125 /* #endif KERNEL_LINUX */
127 #elif defined(HAVE_LIBSTATGRAB)
128 double snum, mnum, lnum;
129 sg_load_stats *ls;
131 if ((ls = sg_get_load_stats ()) == NULL)
132 return;
134 snum = ls->min1;
135 mnum = ls->min5;
136 lnum = ls->min15;
138 load_submit (snum, mnum, lnum);
139 #endif /* HAVE_LIBSTATGRAB */
141 return (0);
142 }
143 #endif /* LOAD_HAVE_READ */
145 void module_register (void)
146 {
147 plugin_register_data_set (&ds);
148 #if LOAD_HAVE_READ
149 plugin_register_read ("load", load_read);
150 #endif
151 }
153 #undef MODULE_NAME