4d43dd45cb7f9a93f391117d2048b70ced049261
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 char *load_file = "load.rrd";
49 static char *ds_def[] =
50 {
51 "DS:shortterm:GAUGE:"COLLECTD_HEARTBEAT":0:100",
52 "DS:midterm:GAUGE:"COLLECTD_HEARTBEAT":0:100",
53 "DS:longterm:GAUGE:"COLLECTD_HEARTBEAT":0:100",
54 NULL
55 };
56 static int ds_num = 3;
58 static void load_init (void)
59 {
60 return;
61 }
63 static void load_write (char *host, char *inst, char *val)
64 {
65 rrd_update_file (host, load_file, val, ds_def, ds_num);
66 }
68 #if LOAD_HAVE_READ
69 #define BUFSIZE 256
70 static void load_submit (double snum, double mnum, double lnum)
71 {
72 char buf[BUFSIZE];
74 if (snprintf (buf, BUFSIZE, "%u:%.2f:%.2f:%.2f", (unsigned int) curtime,
75 snum, mnum, lnum) >= BUFSIZE)
76 return;
78 plugin_submit (MODULE_NAME, "-", buf);
79 }
80 #undef BUFSIZE
82 static void load_read (void)
83 {
84 #if defined(HAVE_GETLOADAVG)
85 double load[3];
87 if (getloadavg (load, 3) == 3)
88 load_submit (load[LOADAVG_1MIN], load[LOADAVG_5MIN], load[LOADAVG_15MIN]);
89 else
90 syslog (LOG_WARNING, "load: getloadavg failed: %s", strerror (errno));
91 /* #endif HAVE_GETLOADAVG */
93 #elif defined(KERNEL_LINUX)
94 double snum, mnum, lnum;
95 FILE *loadavg;
96 char buffer[16];
98 char *fields[8];
99 int numfields;
101 if ((loadavg = fopen ("/proc/loadavg", "r")) == NULL)
102 {
103 syslog (LOG_WARNING, "load: fopen: %s", strerror (errno));
104 return;
105 }
107 if (fgets (buffer, 16, loadavg) == NULL)
108 {
109 syslog (LOG_WARNING, "load: fgets: %s", strerror (errno));
110 return;
111 }
113 if (fclose (loadavg))
114 syslog (LOG_WARNING, "load: fclose: %s", strerror (errno));
116 numfields = strsplit (buffer, fields, 8);
118 if (numfields < 3)
119 return;
121 snum = atof (fields[0]);
122 mnum = atof (fields[1]);
123 lnum = atof (fields[2]);
125 load_submit (snum, mnum, lnum);
126 /* #endif KERNEL_LINUX */
128 #elif defined(HAVE_LIBSTATGRAB)
129 double snum, mnum, lnum;
130 sg_load_stats *ls;
132 if ((ls = sg_get_load_stats ()) == NULL)
133 return;
135 snum = ls->min1;
136 mnum = ls->min5;
137 lnum = ls->min15;
139 load_submit (snum, mnum, lnum);
140 #endif /* HAVE_LIBSTATGRAB */
141 }
142 #else
143 # define load_read NULL
144 #endif /* LOAD_HAVE_READ */
146 void module_register (void)
147 {
148 plugin_register (MODULE_NAME, load_init, load_read, load_write);
149 }
151 #undef MODULE_NAME