3 * Copyright (C) 2005 Florian octo Forster
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.
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.
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
20 * Florian octo Forster <octo at verplant.org>
26 #include "utils_debug.h"
28 #define MODULE_NAME "cpu"
30 #ifdef HAVE_MACH_KERN_RETURN_H
31 # include <mach/kern_return.h>
33 #ifdef HAVE_MACH_MACH_INIT_H
34 # include <mach/mach_init.h>
36 #ifdef HAVE_MACH_HOST_PRIV_H
37 # include <mach/host_priv.h>
39 #ifdef HAVE_MACH_PROCESSOR_INFO_H
40 # include <mach/processor_info.h>
42 #ifdef HAVE_MACH_PROCESSOR_H
43 # include <mach/processor.h>
47 # include <sys/sysinfo.h>
48 #endif /* HAVE_LIBKSTAT */
50 #ifdef HAVE_SYSCTLBYNAME
51 # ifdef HAVE_SYS_SYSCTL_H
52 # include <sys/sysctl.h>
55 # ifdef HAVE_SYS_DKSTAT_H
56 # include <sys/dkstat.h>
59 # if !defined(CP_USER) || !defined(CP_NICE) || !defined(CP_SYS) || !defined(CP_INTR) || !defined(CP_IDLE) || !defined(CPUSTATES)
67 #endif /* HAVE_SYSCTLBYNAME */
69 #if defined(PROCESSOR_CPU_LOAD_INFO) || defined(KERNEL_LINUX) || defined(HAVE_LIBKSTAT) || defined(HAVE_SYSCTLBYNAME)
70 # define CPU_HAVE_READ 1
72 # define CPU_HAVE_READ 0
75 #ifdef PROCESSOR_CPU_LOAD_INFO
76 static mach_port_t port_host;
77 static processor_port_array_t cpu_list;
78 static mach_msg_type_number_t cpu_list_len;
79 /* #endif PROCESSOR_CPU_LOAD_INFO */
81 #elif defined(KERNEL_LINUX)
82 /* no variables needed */
83 /* #endif KERNEL_LINUX */
85 #elif defined(HAVE_LIBKSTAT)
86 /* colleague tells me that Sun doesn't sell systems with more than 100 or so CPUs.. */
87 # define MAX_NUMCPU 256
88 extern kstat_ctl_t *kc;
89 static kstat_t *ksp[MAX_NUMCPU];
91 /* #endif HAVE_LIBKSTAT */
93 #elif defined(HAVE_SYSCTLBYNAME)
95 #endif /* HAVE_SYSCTLBYNAME */
97 static char *cpu_filename = "cpu-%s.rrd";
99 static char *ds_def[] =
101 "DS:user:COUNTER:"COLLECTD_HEARTBEAT":0:U",
102 "DS:nice:COUNTER:"COLLECTD_HEARTBEAT":0:U",
103 "DS:syst:COUNTER:"COLLECTD_HEARTBEAT":0:U",
104 "DS:idle:COUNTER:"COLLECTD_HEARTBEAT":0:U",
105 "DS:wait:COUNTER:"COLLECTD_HEARTBEAT":0:U",
108 static int ds_num = 5;
110 static void cpu_init (void)
112 #ifdef PROCESSOR_CPU_LOAD_INFO
113 kern_return_t status;
115 port_host = mach_host_self ();
117 if ((status = host_processors (port_host, &cpu_list, &cpu_list_len)) != KERN_SUCCESS)
119 syslog (LOG_ERR, "cpu-plugin: host_processors returned %i\n", (int) status);
124 DBG ("host_processors returned %i %s", (int) cpu_list_len, cpu_list_len == 1 ? "processor" : "processors");
125 syslog (LOG_INFO, "cpu-plugin: Found %i processor%s.", (int) cpu_list_len, cpu_list_len == 1 ? "" : "s");
126 /* #endif PROCESSOR_CPU_LOAD_INFO */
128 #elif defined(HAVE_LIBKSTAT)
136 /* Solaris doesn't count linear.. *sigh* */
137 for (numcpu = 0, ksp_chain = kc->kc_chain;
138 (numcpu < MAX_NUMCPU) && (ksp_chain != NULL);
139 ksp_chain = ksp_chain->ks_next)
140 if (strncmp (ksp_chain->ks_module, "cpu_stat", 8) == 0)
141 ksp[numcpu++] = ksp_chain;
142 /* #endif HAVE_LIBKSTAT */
144 #elif defined (HAVE_SYSCTLBYNAME)
147 numcpu_size = sizeof (numcpu);
149 if (sysctlbyname ("hw.ncpu", &numcpu, &numcpu_size, NULL, 0) < 0)
151 syslog (LOG_WARNING, "cpu: sysctlbyname: %s", strerror (errno));
156 syslog (LOG_NOTICE, "cpu: Only one processor supported when using `sysctlbyname' (found %i)", numcpu);
162 static void cpu_write (char *host, char *inst, char *val)
167 status = snprintf (file, 512, cpu_filename, inst);
170 else if (status >= 512)
173 rrd_update_file (host, file, val, ds_def, ds_num);
178 static void cpu_submit (int cpu_num, unsigned long long user,
179 unsigned long long nice, unsigned long long syst,
180 unsigned long long idle, unsigned long long wait)
185 if (snprintf (buf, BUFSIZE, "%u:%llu:%llu:%llu:%llu:%llu", (unsigned int) curtime,
186 user, nice, syst, idle, wait) >= BUFSIZE)
188 snprintf (cpu, 16, "%i", cpu_num);
190 plugin_submit (MODULE_NAME, cpu, buf);
194 static void cpu_read (void)
196 #ifdef PROCESSOR_CPU_LOAD_INFO
199 kern_return_t status;
201 processor_cpu_load_info_data_t cpu_info;
202 processor_cpu_load_info_t cpu_info_ptr;
203 mach_msg_type_number_t cpu_info_len;
207 for (cpu = 0; cpu < cpu_list_len; cpu++)
210 cpu_info_ptr = &cpu_info;
211 cpu_info_len = sizeof (cpu_info);
213 if ((status = processor_info (cpu_list[cpu],
214 PROCESSOR_CPU_LOAD_INFO, &cpu_host,
215 (processor_info_t) cpu_info_ptr, &cpu_info_len)) != KERN_SUCCESS)
217 syslog (LOG_ERR, "processor_info failed with status %i\n", (int) status);
221 if (cpu_info_len < CPU_STATE_MAX)
223 syslog (LOG_ERR, "processor_info returned only %i elements..\n", cpu_info_len);
227 cpu_submit (cpu, cpu_info.cpu_ticks[CPU_STATE_USER],
228 cpu_info.cpu_ticks[CPU_STATE_NICE],
229 cpu_info.cpu_ticks[CPU_STATE_SYSTEM],
230 cpu_info.cpu_ticks[CPU_STATE_IDLE],
233 /* #endif PROCESSOR_CPU_LOAD_INFO */
235 #elif defined(KERNEL_LINUX)
236 # define BUFSIZE 1024
238 unsigned long long user, nice, syst, idle;
239 unsigned long long wait, intr, sitr; /* sitr == soft interrupt */
246 if ((fh = fopen ("/proc/stat", "r")) == NULL)
248 syslog (LOG_WARNING, "cpu: fopen: %s", strerror (errno));
252 while (fgets (buf, BUFSIZE, fh) != NULL)
254 if (strncmp (buf, "cpu", 3))
256 if ((buf[3] < '0') || (buf[3] > '9'))
259 numfields = strsplit (buf, fields, 9);
263 cpu = atoi (fields[0] + 3);
264 user = atoll (fields[1]);
265 nice = atoll (fields[2]);
266 syst = atoll (fields[3]);
267 idle = atoll (fields[4]);
271 wait = atoll (fields[5]);
272 intr = atoll (fields[6]);
273 sitr = atoll (fields[7]);
275 /* I doubt anyone cares about the time spent in
276 * interrupt handlers.. */
284 cpu_submit (cpu, user, nice, syst, idle, wait);
289 /* #endif defined(KERNEL_LINUX) */
291 #elif defined(HAVE_LIBKSTAT)
293 unsigned long long user, syst, idle, wait;
294 static cpu_stat_t cs;
299 for (cpu = 0; cpu < numcpu; cpu++)
301 if (kstat_read (kc, ksp[cpu], &cs) == -1)
302 continue; /* error message? */
304 idle = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_IDLE];
305 user = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_USER];
306 syst = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_KERNEL];
307 wait = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_WAIT];
309 cpu_submit (ksp[cpu]->ks_instance,
310 user, 0LL, syst, idle, wait);
312 /* #endif defined(HAVE_LIBKSTAT) */
314 #elif defined(HAVE_SYSCTLBYNAME)
315 long cpuinfo[CPUSTATES];
318 cpuinfo_size = sizeof (cpuinfo);
320 if (sysctlbyname("kern.cp_time", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
322 syslog (LOG_WARNING, "cpu: sysctlbyname: %s", strerror (errno));
326 cpuinfo[CP_SYS] += cpuinfo[CP_INTR];
328 /* FIXME: Instance is always `0' */
329 cpu_submit (0, cpuinfo[CP_USER], cpuinfo[CP_NICE], cpuinfo[CP_SYS], cpuinfo[CP_IDLE], 0LL);
335 # define cpu_read NULL
336 #endif /* CPU_HAVE_READ */
338 void module_register (void)
340 plugin_register (MODULE_NAME, cpu_init, cpu_read, cpu_write);