3 * Copyright (C) 2005,2006 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 #if HAVE_MACH_MACH_ERROR_H
40 # include <mach/mach_error.h>
42 #ifdef HAVE_MACH_PROCESSOR_INFO_H
43 # include <mach/processor_info.h>
45 #ifdef HAVE_MACH_PROCESSOR_H
46 # include <mach/processor.h>
48 #ifdef HAVE_MACH_VM_MAP_H
49 # include <mach/vm_map.h>
53 # include <sys/sysinfo.h>
54 #endif /* HAVE_LIBKSTAT */
56 #ifdef HAVE_SYSCTLBYNAME
57 # ifdef HAVE_SYS_SYSCTL_H
58 # include <sys/sysctl.h>
61 # ifdef HAVE_SYS_DKSTAT_H
62 # include <sys/dkstat.h>
65 # if !defined(CP_USER) || !defined(CP_NICE) || !defined(CP_SYS) || !defined(CP_INTR) || !defined(CP_IDLE) || !defined(CPUSTATES)
73 #endif /* HAVE_SYSCTLBYNAME */
75 #if defined(PROCESSOR_CPU_LOAD_INFO) || defined(KERNEL_LINUX) || defined(HAVE_LIBKSTAT) || defined(HAVE_SYSCTLBYNAME)
76 # define CPU_HAVE_READ 1
78 # define CPU_HAVE_READ 0
81 #ifdef PROCESSOR_CPU_LOAD_INFO
82 static mach_port_t port_host;
83 static processor_port_array_t cpu_list;
84 static mach_msg_type_number_t cpu_list_len;
86 #if PROCESSOR_TEMPERATURE
87 static int cpu_temp_retry_counter = 0;
88 static int cpu_temp_retry_step = 1;
89 static int cpu_temp_retry_max = 1;
90 #endif /* PROCESSOR_TEMPERATURE */
91 /* #endif PROCESSOR_CPU_LOAD_INFO */
93 #elif defined(KERNEL_LINUX)
94 /* no variables needed */
95 /* #endif KERNEL_LINUX */
97 #elif defined(HAVE_LIBKSTAT)
98 /* colleague tells me that Sun doesn't sell systems with more than 100 or so CPUs.. */
99 # define MAX_NUMCPU 256
100 extern kstat_ctl_t *kc;
101 static kstat_t *ksp[MAX_NUMCPU];
103 /* #endif HAVE_LIBKSTAT */
105 #elif defined(HAVE_SYSCTLBYNAME)
107 #endif /* HAVE_SYSCTLBYNAME */
109 static char *cpu_filename = "cpu-%s.rrd";
111 static char *ds_def[] =
113 "DS:user:COUNTER:"COLLECTD_HEARTBEAT":0:U",
114 "DS:nice:COUNTER:"COLLECTD_HEARTBEAT":0:U",
115 "DS:syst:COUNTER:"COLLECTD_HEARTBEAT":0:U",
116 "DS:idle:COUNTER:"COLLECTD_HEARTBEAT":0:U",
117 "DS:wait:COUNTER:"COLLECTD_HEARTBEAT":0:U",
120 static int ds_num = 5;
122 static void cpu_init (void)
124 #if PROCESSOR_CPU_LOAD_INFO || PROCESSOR_TEMPERATURE
125 kern_return_t status;
128 port_host = mach_host_self ();
130 /* FIXME: Free `cpu_list' if it's not NULL */
131 if ((status = host_processors (port_host, &cpu_list, &cpu_list_len)) != KERN_SUCCESS)
133 syslog (LOG_ERR, "cpu-plugin: host_processors returned %i\n", (int) status);
138 DBG ("host_processors returned %i %s", (int) cpu_list_len, cpu_list_len == 1 ? "processor" : "processors");
139 syslog (LOG_INFO, "cpu-plugin: Found %i processor%s.", (int) cpu_list_len, cpu_list_len == 1 ? "" : "s");
141 collectd_step = atoi (COLLECTD_STEP);
142 if ((collectd_step > 0) && (collectd_step <= 86400))
143 cpu_temp_retry_max = 86400 / collectd_step;
145 /* #endif PROCESSOR_CPU_LOAD_INFO */
147 #elif defined(HAVE_LIBKSTAT)
155 /* Solaris doesn't count linear.. *sigh* */
156 for (numcpu = 0, ksp_chain = kc->kc_chain;
157 (numcpu < MAX_NUMCPU) && (ksp_chain != NULL);
158 ksp_chain = ksp_chain->ks_next)
159 if (strncmp (ksp_chain->ks_module, "cpu_stat", 8) == 0)
160 ksp[numcpu++] = ksp_chain;
161 /* #endif HAVE_LIBKSTAT */
163 #elif defined (HAVE_SYSCTLBYNAME)
166 numcpu_size = sizeof (numcpu);
168 if (sysctlbyname ("hw.ncpu", &numcpu, &numcpu_size, NULL, 0) < 0)
170 syslog (LOG_WARNING, "cpu: sysctlbyname: %s", strerror (errno));
175 syslog (LOG_NOTICE, "cpu: Only one processor supported when using `sysctlbyname' (found %i)", numcpu);
181 static void cpu_write (char *host, char *inst, char *val)
186 status = snprintf (file, 512, cpu_filename, inst);
189 else if (status >= 512)
192 rrd_update_file (host, file, val, ds_def, ds_num);
197 static void cpu_submit (int cpu_num, unsigned long long user,
198 unsigned long long nice, unsigned long long syst,
199 unsigned long long idle, unsigned long long wait)
204 if (snprintf (buf, BUFSIZE, "%u:%llu:%llu:%llu:%llu:%llu", (unsigned int) curtime,
205 user, nice, syst, idle, wait) >= BUFSIZE)
207 snprintf (cpu, 16, "%i", cpu_num);
209 plugin_submit (MODULE_NAME, cpu, buf);
213 static void cpu_read (void)
215 #if PROCESSOR_CPU_LOAD_INFO || PROCESSOR_TEMPERATURE
218 kern_return_t status;
220 #if PROCESSOR_CPU_LOAD_INFO
221 processor_cpu_load_info_data_t cpu_info;
222 mach_msg_type_number_t cpu_info_len;
224 #if PROCESSOR_TEMPERATURE
225 processor_info_data_t cpu_temp;
226 mach_msg_type_number_t cpu_temp_len;
231 for (cpu = 0; cpu < cpu_list_len; cpu++)
233 #if PROCESSOR_CPU_LOAD_INFO
235 cpu_info_len = PROCESSOR_BASIC_INFO_COUNT;
237 if ((status = processor_info (cpu_list[cpu],
238 PROCESSOR_CPU_LOAD_INFO, &cpu_host,
239 (processor_info_t) &cpu_info, &cpu_info_len)) != KERN_SUCCESS)
241 syslog (LOG_ERR, "cpu-plugin: processor_info failed with status %i\n", (int) status);
245 if (cpu_info_len < CPU_STATE_MAX)
247 syslog (LOG_ERR, "cpu-plugin: processor_info returned only %i elements..\n", cpu_info_len);
251 cpu_submit (cpu, cpu_info.cpu_ticks[CPU_STATE_USER],
252 cpu_info.cpu_ticks[CPU_STATE_NICE],
253 cpu_info.cpu_ticks[CPU_STATE_SYSTEM],
254 cpu_info.cpu_ticks[CPU_STATE_IDLE],
256 #endif /* PROCESSOR_CPU_LOAD_INFO */
257 #if PROCESSOR_TEMPERATURE
259 * Not all Apple computers do have this ability. To minimize
260 * the messages sent to the syslog we do an exponential
261 * stepback if `processor_info' fails. We still try ~once a day
264 if (cpu_temp_retry_counter > 0)
266 cpu_temp_retry_counter--;
270 cpu_temp_len = PROCESSOR_INFO_MAX;
272 status = processor_info (cpu_list[cpu],
273 PROCESSOR_TEMPERATURE,
275 cpu_temp, &cpu_temp_len);
276 if (status != KERN_SUCCESS)
278 syslog (LOG_ERR, "cpu-plugin: processor_info failed: %s",
279 mach_error_string (status));
281 cpu_temp_retry_counter = cpu_temp_retry_step;
282 cpu_temp_retry_step *= 2;
283 if (cpu_temp_retry_step > cpu_temp_retry_max)
284 cpu_temp_retry_step = cpu_temp_retry_max;
289 if (cpu_temp_len != 1)
291 DBG ("processor_info (PROCESSOR_TEMPERATURE) returned %i elements..?",
296 cpu_temp_retry_counter = 0;
297 cpu_temp_retry_step = 1;
299 DBG ("cpu_temp = %i", (int) cpu_temp);
300 #endif /* PROCESSOR_TEMPERATURE */
302 /* #endif PROCESSOR_CPU_LOAD_INFO */
304 #elif defined(KERNEL_LINUX)
305 # define BUFSIZE 1024
307 unsigned long long user, nice, syst, idle;
308 unsigned long long wait, intr, sitr; /* sitr == soft interrupt */
315 static complain_t complain_obj;
317 if ((fh = fopen ("/proc/stat", "r")) == NULL)
319 plugin_complain (LOG_ERR, &complain_obj, "cpu plugin: "
320 "fopen (/proc/stat) failed: %s",
325 plugin_relief (LOG_NOTICE, &complain_obj, "cpu plugin: "
326 "fopen (/proc/stat) succeeded.");
328 while (fgets (buf, BUFSIZE, fh) != NULL)
330 if (strncmp (buf, "cpu", 3))
332 if ((buf[3] < '0') || (buf[3] > '9'))
335 numfields = strsplit (buf, fields, 9);
339 cpu = atoi (fields[0] + 3);
340 user = atoll (fields[1]);
341 nice = atoll (fields[2]);
342 syst = atoll (fields[3]);
343 idle = atoll (fields[4]);
347 wait = atoll (fields[5]);
348 intr = atoll (fields[6]);
349 sitr = atoll (fields[7]);
351 /* I doubt anyone cares about the time spent in
352 * interrupt handlers.. */
360 cpu_submit (cpu, user, nice, syst, idle, wait);
365 /* #endif defined(KERNEL_LINUX) */
367 #elif defined(HAVE_LIBKSTAT)
369 unsigned long long user, syst, idle, wait;
370 static cpu_stat_t cs;
375 for (cpu = 0; cpu < numcpu; cpu++)
377 if (kstat_read (kc, ksp[cpu], &cs) == -1)
378 continue; /* error message? */
380 idle = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_IDLE];
381 user = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_USER];
382 syst = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_KERNEL];
383 wait = (unsigned long long) cs.cpu_sysinfo.cpu[CPU_WAIT];
385 cpu_submit (ksp[cpu]->ks_instance,
386 user, 0LL, syst, idle, wait);
388 /* #endif defined(HAVE_LIBKSTAT) */
390 #elif defined(HAVE_SYSCTLBYNAME)
391 long cpuinfo[CPUSTATES];
394 static complain_t complain_obj;
396 cpuinfo_size = sizeof (cpuinfo);
398 if (sysctlbyname("kern.cp_time", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
400 plugin_complain (LOG_ERR, &complain_obj, "cpu plugin: "
401 "sysctlbyname failed: %s.",
406 plugin_relief (LOG_NOTICE, &complain_obj, "cpu plugin: "
407 "sysctlbyname succeeded.");
409 cpuinfo[CP_SYS] += cpuinfo[CP_INTR];
411 /* FIXME: Instance is always `0' */
412 cpu_submit (0, cpuinfo[CP_USER], cpuinfo[CP_NICE], cpuinfo[CP_SYS], cpuinfo[CP_IDLE], 0LL);
418 # define cpu_read NULL
419 #endif /* CPU_HAVE_READ */
421 void module_register (void)
423 plugin_register (MODULE_NAME, cpu_init, cpu_read, cpu_write);