3 * Copyright (C) 2005-2007 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; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
26 #ifdef HAVE_MACH_KERN_RETURN_H
27 # include <mach/kern_return.h>
29 #ifdef HAVE_MACH_MACH_INIT_H
30 # include <mach/mach_init.h>
32 #ifdef HAVE_MACH_HOST_PRIV_H
33 # include <mach/host_priv.h>
35 #if HAVE_MACH_MACH_ERROR_H
36 # include <mach/mach_error.h>
38 #ifdef HAVE_MACH_PROCESSOR_INFO_H
39 # include <mach/processor_info.h>
41 #ifdef HAVE_MACH_PROCESSOR_H
42 # include <mach/processor.h>
44 #ifdef HAVE_MACH_VM_MAP_H
45 # include <mach/vm_map.h>
49 # include <sys/sysinfo.h>
50 #endif /* HAVE_LIBKSTAT */
52 #ifdef HAVE_SYSCTLBYNAME
53 # ifdef HAVE_SYS_SYSCTL_H
54 # include <sys/sysctl.h>
57 # ifdef HAVE_SYS_DKSTAT_H
58 # include <sys/dkstat.h>
61 # if !defined(CP_USER) || !defined(CP_NICE) || !defined(CP_SYS) || !defined(CP_INTR) || !defined(CP_IDLE) || !defined(CPUSTATES)
69 #endif /* HAVE_SYSCTLBYNAME */
71 #if defined(PROCESSOR_CPU_LOAD_INFO) || defined(KERNEL_LINUX) || defined(HAVE_LIBKSTAT) || defined(HAVE_SYSCTLBYNAME)
72 # define CPU_HAVE_READ 1
74 # define CPU_HAVE_READ 0
78 #ifdef PROCESSOR_CPU_LOAD_INFO
79 static mach_port_t port_host;
80 static processor_port_array_t cpu_list;
81 static mach_msg_type_number_t cpu_list_len;
83 #if PROCESSOR_TEMPERATURE
84 static int cpu_temp_retry_counter = 0;
85 static int cpu_temp_retry_step = 1;
86 static int cpu_temp_retry_max = 1;
87 #endif /* PROCESSOR_TEMPERATURE */
88 /* #endif PROCESSOR_CPU_LOAD_INFO */
90 #elif defined(KERNEL_LINUX)
91 /* no variables needed */
92 /* #endif KERNEL_LINUX */
94 #elif defined(HAVE_LIBKSTAT)
95 /* colleague tells me that Sun doesn't sell systems with more than 100 or so CPUs.. */
96 # define MAX_NUMCPU 256
97 extern kstat_ctl_t *kc;
98 static kstat_t *ksp[MAX_NUMCPU];
100 /* #endif HAVE_LIBKSTAT */
102 #elif defined(HAVE_SYSCTLBYNAME)
104 #endif /* HAVE_SYSCTLBYNAME */
106 static int init (void)
108 #if PROCESSOR_CPU_LOAD_INFO || PROCESSOR_TEMPERATURE
109 kern_return_t status;
111 port_host = mach_host_self ();
113 /* FIXME: Free `cpu_list' if it's not NULL */
114 if ((status = host_processors (port_host, &cpu_list, &cpu_list_len)) != KERN_SUCCESS)
116 ERROR ("cpu plugin: host_processors returned %i", (int) status);
121 DEBUG ("host_processors returned %i %s", (int) cpu_list_len, cpu_list_len == 1 ? "processor" : "processors");
122 INFO ("cpu plugin: Found %i processor%s.", (int) cpu_list_len, cpu_list_len == 1 ? "" : "s");
124 cpu_temp_retry_max = 86400 / interval_g;
125 /* #endif PROCESSOR_CPU_LOAD_INFO */
127 #elif defined(HAVE_LIBKSTAT)
135 /* Solaris doesn't count linear.. *sigh* */
136 for (numcpu = 0, ksp_chain = kc->kc_chain;
137 (numcpu < MAX_NUMCPU) && (ksp_chain != NULL);
138 ksp_chain = ksp_chain->ks_next)
139 if (strncmp (ksp_chain->ks_module, "cpu_stat", 8) == 0)
140 ksp[numcpu++] = ksp_chain;
141 /* #endif HAVE_LIBKSTAT */
143 #elif defined (HAVE_SYSCTLBYNAME)
146 numcpu_size = sizeof (numcpu);
148 if (sysctlbyname ("hw.ncpu", &numcpu, &numcpu_size, NULL, 0) < 0)
151 WARNING ("cpu plugin: sysctlbyname: %s",
152 sstrerror (errno, errbuf, sizeof (errbuf)));
157 NOTICE ("cpu: Only one processor supported when using `sysctlbyname' (found %i)", numcpu);
163 static void submit (int cpu_num, const char *type_instance, counter_t value)
166 value_list_t vl = VALUE_LIST_INIT;
168 values[0].counter = value;
172 vl.time = time (NULL);
173 strcpy (vl.host, hostname_g);
174 strcpy (vl.plugin, "cpu");
175 snprintf (vl.plugin_instance, sizeof (vl.type_instance),
177 vl.plugin_instance[DATA_MAX_NAME_LEN - 1] = '\0';
178 strcpy (vl.type_instance, type_instance);
180 plugin_dispatch_values ("cpu", &vl);
183 static int cpu_read (void)
185 #if PROCESSOR_CPU_LOAD_INFO || PROCESSOR_TEMPERATURE
188 kern_return_t status;
190 #if PROCESSOR_CPU_LOAD_INFO
191 processor_cpu_load_info_data_t cpu_info;
192 mach_msg_type_number_t cpu_info_len;
194 #if PROCESSOR_TEMPERATURE
195 processor_info_data_t cpu_temp;
196 mach_msg_type_number_t cpu_temp_len;
201 for (cpu = 0; cpu < cpu_list_len; cpu++)
203 #if PROCESSOR_CPU_LOAD_INFO
205 cpu_info_len = PROCESSOR_BASIC_INFO_COUNT;
207 if ((status = processor_info (cpu_list[cpu],
208 PROCESSOR_CPU_LOAD_INFO, &cpu_host,
209 (processor_info_t) &cpu_info, &cpu_info_len)) != KERN_SUCCESS)
211 ERROR ("cpu plugin: processor_info failed with status %i", (int) status);
215 if (cpu_info_len < CPU_STATE_MAX)
217 ERROR ("cpu plugin: processor_info returned only %i elements..", cpu_info_len);
221 submit (cpu, "user", (counter_t) cpu_info.cpu_ticks[CPU_STATE_USER]);
222 submit (cpu, "nice", (counter_t) cpu_info.cpu_ticks[CPU_STATE_NICE]);
223 submit (cpu, "system", (counter_t) cpu_info.cpu_ticks[CPU_STATE_SYSTEM]);
224 submit (cpu, "idle", (counter_t) cpu_info.cpu_ticks[CPU_STATE_IDLE]);
225 #endif /* PROCESSOR_CPU_LOAD_INFO */
226 #if PROCESSOR_TEMPERATURE
228 * Not all Apple computers do have this ability. To minimize
229 * the messages sent to the syslog we do an exponential
230 * stepback if `processor_info' fails. We still try ~once a day
233 if (cpu_temp_retry_counter > 0)
235 cpu_temp_retry_counter--;
239 cpu_temp_len = PROCESSOR_INFO_MAX;
241 status = processor_info (cpu_list[cpu],
242 PROCESSOR_TEMPERATURE,
244 cpu_temp, &cpu_temp_len);
245 if (status != KERN_SUCCESS)
247 ERROR ("cpu plugin: processor_info failed: %s",
248 mach_error_string (status));
250 cpu_temp_retry_counter = cpu_temp_retry_step;
251 cpu_temp_retry_step *= 2;
252 if (cpu_temp_retry_step > cpu_temp_retry_max)
253 cpu_temp_retry_step = cpu_temp_retry_max;
258 if (cpu_temp_len != 1)
260 DEBUG ("processor_info (PROCESSOR_TEMPERATURE) returned %i elements..?",
265 cpu_temp_retry_counter = 0;
266 cpu_temp_retry_step = 1;
268 DEBUG ("cpu_temp = %i", (int) cpu_temp);
269 #endif /* PROCESSOR_TEMPERATURE */
271 /* #endif PROCESSOR_CPU_LOAD_INFO */
273 #elif defined(KERNEL_LINUX)
275 counter_t user, nice, syst, idle;
276 counter_t wait, intr, sitr; /* sitr == soft interrupt */
283 static complain_t complain_obj;
285 if ((fh = fopen ("/proc/stat", "r")) == NULL)
288 plugin_complain (LOG_ERR, &complain_obj, "cpu plugin: "
289 "fopen (/proc/stat) failed: %s",
290 sstrerror (errno, errbuf, sizeof (errbuf)));
294 plugin_relief (LOG_NOTICE, &complain_obj, "cpu plugin: "
295 "fopen (/proc/stat) succeeded.");
297 while (fgets (buf, 1024, fh) != NULL)
299 if (strncmp (buf, "cpu", 3))
301 if ((buf[3] < '0') || (buf[3] > '9'))
304 numfields = strsplit (buf, fields, 9);
308 cpu = atoi (fields[0] + 3);
309 user = atoll (fields[1]);
310 nice = atoll (fields[2]);
311 syst = atoll (fields[3]);
312 idle = atoll (fields[4]);
314 submit (cpu, "user", user);
315 submit (cpu, "nice", nice);
316 submit (cpu, "system", syst);
317 submit (cpu, "idle", idle);
321 wait = atoll (fields[5]);
322 intr = atoll (fields[6]);
323 sitr = atoll (fields[7]);
325 submit (cpu, "wait", wait);
326 submit (cpu, "interrupt", intr);
327 submit (cpu, "softirq", sitr);
330 submit (cpu, "steal", atoll (fields[8]));
335 /* #endif defined(KERNEL_LINUX) */
337 #elif defined(HAVE_LIBKSTAT)
339 counter_t user, syst, idle, wait;
340 static cpu_stat_t cs;
345 for (cpu = 0; cpu < numcpu; cpu++)
347 if (kstat_read (kc, ksp[cpu], &cs) == -1)
348 continue; /* error message? */
350 idle = (counter_t) cs.cpu_sysinfo.cpu[CPU_IDLE];
351 user = (counter_t) cs.cpu_sysinfo.cpu[CPU_USER];
352 syst = (counter_t) cs.cpu_sysinfo.cpu[CPU_KERNEL];
353 wait = (counter_t) cs.cpu_sysinfo.cpu[CPU_WAIT];
355 submit (ksp[cpu]->ks_instance, "user", user);
356 submit (ksp[cpu]->ks_instance, "system", syst);
357 submit (ksp[cpu]->ks_instance, "idle", idle);
358 submit (ksp[cpu]->ks_instance, "wait", wait);
360 /* #endif defined(HAVE_LIBKSTAT) */
362 #elif defined(HAVE_SYSCTLBYNAME)
363 long cpuinfo[CPUSTATES];
366 static complain_t complain_obj;
368 cpuinfo_size = sizeof (cpuinfo);
370 if (sysctlbyname("kern.cp_time", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
373 plugin_complain (LOG_ERR, &complain_obj, "cpu plugin: "
374 "sysctlbyname failed: %s.",
375 sstrerror (errno, errbuf, sizeof (errbuf)));
379 plugin_relief (LOG_NOTICE, &complain_obj, "cpu plugin: "
380 "sysctlbyname succeeded.");
382 cpuinfo[CP_SYS] += cpuinfo[CP_INTR];
384 submit (0, "user", cpuinfo[CP_USER]);
385 submit (0, "nice", cpuinfo[CP_NICE]);
386 submit (0, "system", cpuinfo[CP_SYS]);
387 submit (0, "idle", cpuinfo[CP_IDLE]);
392 #endif /* CPU_HAVE_READ */
394 void module_register (void)
397 plugin_register_init ("cpu", init);
398 plugin_register_read ("cpu", cpu_read);
399 #endif /* CPU_HAVE_READ */
400 } /* void module_register */