1 /**
2 * collectd - src/cpu.c
3 * Copyright (C) 2005-2014 Florian octo Forster
4 * Copyright (C) 2008 Oleg King
5 * Copyright (C) 2009 Simon Kuhnle
6 * Copyright (C) 2009 Manuel Sanmartin
7 * Copyright (C) 2013-2014 Pierre-Yves Ritschard
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; only version 2 of the License is applicable.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 * Authors:
23 * Florian octo Forster <octo at collectd.org>
24 * Oleg King <king2 at kaluga.ru>
25 * Simon Kuhnle <simon at blarzwurst.de>
26 * Manuel Sanmartin
27 * Pierre-Yves Ritschard <pyr at spootnik.org>
28 **/
30 #include "collectd.h"
32 #include "common.h"
33 #include "plugin.h"
35 #ifdef HAVE_MACH_KERN_RETURN_H
36 # include <mach/kern_return.h>
37 #endif
38 #ifdef HAVE_MACH_MACH_INIT_H
39 # include <mach/mach_init.h>
40 #endif
41 #ifdef HAVE_MACH_HOST_PRIV_H
42 # include <mach/host_priv.h>
43 #endif
44 #if HAVE_MACH_MACH_ERROR_H
45 # include <mach/mach_error.h>
46 #endif
47 #ifdef HAVE_MACH_PROCESSOR_INFO_H
48 # include <mach/processor_info.h>
49 #endif
50 #ifdef HAVE_MACH_PROCESSOR_H
51 # include <mach/processor.h>
52 #endif
53 #ifdef HAVE_MACH_VM_MAP_H
54 # include <mach/vm_map.h>
55 #endif
57 #ifdef HAVE_LIBKSTAT
58 # include <sys/sysinfo.h>
59 #endif /* HAVE_LIBKSTAT */
61 #if (defined(HAVE_SYSCTL) && HAVE_SYSCTL) \
62 || (defined(HAVE_SYSCTLBYNAME) && HAVE_SYSCTLBYNAME)
63 # ifdef HAVE_SYS_SYSCTL_H
64 # include <sys/sysctl.h>
65 # endif
67 # ifdef HAVE_SYS_DKSTAT_H
68 # include <sys/dkstat.h>
69 # endif
71 # if !defined(CP_USER) || !defined(CP_NICE) || !defined(CP_SYS) || !defined(CP_INTR) || !defined(CP_IDLE) || !defined(CPUSTATES)
72 # define CP_USER 0
73 # define CP_NICE 1
74 # define CP_SYS 2
75 # define CP_INTR 3
76 # define CP_IDLE 4
77 # define CPUSTATES 5
78 # endif
79 #endif /* HAVE_SYSCTL || HAVE_SYSCTLBYNAME */
81 #if HAVE_SYSCTL
82 # if defined(CTL_HW) && defined(HW_NCPU) \
83 && defined(CTL_KERN) && defined(KERN_CPTIME) && defined(CPUSTATES)
84 # define CAN_USE_SYSCTL 1
85 # else
86 # define CAN_USE_SYSCTL 0
87 # endif
88 #else
89 # define CAN_USE_SYSCTL 0
90 #endif
92 #define COLLECTD_CPU_STATE_USER 0
93 #define COLLECTD_CPU_STATE_SYSTEM 1
94 #define COLLECTD_CPU_STATE_WAIT 2
95 #define COLLECTD_CPU_STATE_NICE 3
96 #define COLLECTD_CPU_STATE_SWAP 4
97 #define COLLECTD_CPU_STATE_INTERRUPT 5
98 #define COLLECTD_CPU_STATE_SOFTIRQ 6
99 #define COLLECTD_CPU_STATE_STEAL 7
100 #define COLLECTD_CPU_STATE_IDLE 8
101 #define COLLECTD_CPU_STATE_ACTIVE 9 /* sum of (!idle) */
102 #define COLLECTD_CPU_STATE_MAX 10 /* #states */
104 #if HAVE_STATGRAB_H
105 # include <statgrab.h>
106 #endif
108 # ifdef HAVE_PERFSTAT
109 # include <sys/protosw.h>
110 # include <libperfstat.h>
111 # endif /* HAVE_PERFSTAT */
113 #if !PROCESSOR_CPU_LOAD_INFO && !KERNEL_LINUX && !HAVE_LIBKSTAT \
114 && !CAN_USE_SYSCTL && !HAVE_SYSCTLBYNAME && !HAVE_LIBSTATGRAB && !HAVE_PERFSTAT
115 # error "No applicable input method."
116 #endif
118 static const char *cpu_state_names[] = {
119 "user",
120 "system",
121 "wait",
122 "nice",
123 "swap",
124 "interrupt",
125 "softirq",
126 "steal",
127 "idle",
128 "active"
129 };
131 #ifdef PROCESSOR_CPU_LOAD_INFO
132 static mach_port_t port_host;
133 static processor_port_array_t cpu_list;
134 static mach_msg_type_number_t cpu_list_len;
135 /* #endif PROCESSOR_CPU_LOAD_INFO */
137 #elif defined(KERNEL_LINUX)
138 /* no variables needed */
139 /* #endif KERNEL_LINUX */
141 #elif defined(HAVE_LIBKSTAT)
142 /* colleague tells me that Sun doesn't sell systems with more than 100 or so CPUs.. */
143 # define MAX_NUMCPU 256
144 extern kstat_ctl_t *kc;
145 static kstat_t *ksp[MAX_NUMCPU];
146 static int numcpu;
147 /* #endif HAVE_LIBKSTAT */
149 #elif CAN_USE_SYSCTL
150 static int numcpu;
151 /* #endif CAN_USE_SYSCTL */
153 #elif defined(HAVE_SYSCTLBYNAME)
154 static int numcpu;
155 # ifdef HAVE_SYSCTL_KERN_CP_TIMES
156 static int maxcpu;
157 # endif /* HAVE_SYSCTL_KERN_CP_TIMES */
158 /* #endif HAVE_SYSCTLBYNAME */
160 #elif defined(HAVE_LIBSTATGRAB)
161 /* no variables needed */
162 /* #endif HAVE_LIBSTATGRAB */
164 #elif defined(HAVE_PERFSTAT)
165 static perfstat_cpu_t *perfcpu;
166 static int numcpu;
167 static int pnumcpu;
168 #endif /* HAVE_PERFSTAT */
170 #define RATE_ADD(sum, val) do { \
171 if (isnan (sum)) \
172 (sum) = (val); \
173 else if (!isnan (val)) \
174 (sum) += (val); \
175 } while (0)
177 struct cpu_state_s
178 {
179 value_to_rate_state_t conv;
180 gauge_t rate;
181 _Bool has_value;
182 };
183 typedef struct cpu_state_s cpu_state_t;
185 static cpu_state_t *cpu_states = NULL;
186 static size_t cpu_states_num = 0; /* #cpu_states allocated */
188 /* Highest CPU number in the current iteration. Used by the dispatch logic to
189 * determine how many CPUs there were. Reset to 0 by cpu_reset(). */
190 static size_t global_cpu_num = 0;
192 static _Bool report_by_cpu = 1;
193 static _Bool report_by_state = 1;
194 static _Bool report_percent = 0;
195 static _Bool report_num_cpu = 0;
197 static const char *config_keys[] =
198 {
199 "ReportByCpu",
200 "ReportByState",
201 "ReportNumCpu",
202 "ValuesPercentage"
203 };
204 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
206 static int cpu_config (char const *key, char const *value) /* {{{ */
207 {
208 if (strcasecmp (key, "ReportByCpu") == 0)
209 report_by_cpu = IS_TRUE (value) ? 1 : 0;
210 else if (strcasecmp (key, "ValuesPercentage") == 0)
211 report_percent = IS_TRUE (value) ? 1 : 0;
212 else if (strcasecmp (key, "ReportByState") == 0)
213 report_by_state = IS_TRUE (value) ? 1 : 0;
214 else if (strcasecmp (key, "ReportNumCpu") == 0)
215 report_num_cpu = IS_TRUE (value) ? 1 : 0;
216 else
217 return (-1);
219 return (0);
220 } /* }}} int cpu_config */
222 static int init (void)
223 {
224 #if PROCESSOR_CPU_LOAD_INFO
225 kern_return_t status;
227 port_host = mach_host_self ();
229 status = host_processors (port_host, &cpu_list, &cpu_list_len);
230 if (status == KERN_INVALID_ARGUMENT)
231 {
232 ERROR ("cpu plugin: Don't have a privileged host control port. "
233 "The most common cause for this problem is "
234 "that collectd is running without root "
235 "privileges, which are required to read CPU "
236 "load information. "
237 "<https://collectd.org/bugs/22>");
238 cpu_list_len = 0;
239 return (-1);
240 }
241 if (status != KERN_SUCCESS)
242 {
243 ERROR ("cpu plugin: host_processors() failed with status %d.", (int) status);
244 cpu_list_len = 0;
245 return (-1);
246 }
248 INFO ("cpu plugin: Found %i processor%s.", (int) cpu_list_len, cpu_list_len == 1 ? "" : "s");
249 /* #endif PROCESSOR_CPU_LOAD_INFO */
251 #elif defined(HAVE_LIBKSTAT)
252 kstat_t *ksp_chain;
254 numcpu = 0;
256 if (kc == NULL)
257 return (-1);
259 /* Solaris doesn't count linear.. *sigh* */
260 for (numcpu = 0, ksp_chain = kc->kc_chain;
261 (numcpu < MAX_NUMCPU) && (ksp_chain != NULL);
262 ksp_chain = ksp_chain->ks_next)
263 if (strncmp (ksp_chain->ks_module, "cpu_stat", 8) == 0)
264 ksp[numcpu++] = ksp_chain;
265 /* #endif HAVE_LIBKSTAT */
267 #elif CAN_USE_SYSCTL
268 size_t numcpu_size;
269 int mib[2] = {CTL_HW, HW_NCPU};
270 int status;
272 numcpu = 0;
273 numcpu_size = sizeof (numcpu);
275 status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
276 &numcpu, &numcpu_size, NULL, 0);
277 if (status == -1)
278 {
279 char errbuf[1024];
280 WARNING ("cpu plugin: sysctl: %s",
281 sstrerror (errno, errbuf, sizeof (errbuf)));
282 return (-1);
283 }
284 /* #endif CAN_USE_SYSCTL */
286 #elif defined (HAVE_SYSCTLBYNAME)
287 size_t numcpu_size;
289 numcpu_size = sizeof (numcpu);
291 if (sysctlbyname ("hw.ncpu", &numcpu, &numcpu_size, NULL, 0) < 0)
292 {
293 char errbuf[1024];
294 WARNING ("cpu plugin: sysctlbyname(hw.ncpu): %s",
295 sstrerror (errno, errbuf, sizeof (errbuf)));
296 return (-1);
297 }
299 #ifdef HAVE_SYSCTL_KERN_CP_TIMES
300 numcpu_size = sizeof (maxcpu);
302 if (sysctlbyname("kern.smp.maxcpus", &maxcpu, &numcpu_size, NULL, 0) < 0)
303 {
304 char errbuf[1024];
305 WARNING ("cpu plugin: sysctlbyname(kern.smp.maxcpus): %s",
306 sstrerror (errno, errbuf, sizeof (errbuf)));
307 return (-1);
308 }
309 #else
310 if (numcpu != 1)
311 NOTICE ("cpu: Only one processor supported when using `sysctlbyname' (found %i)", numcpu);
312 #endif
313 /* #endif HAVE_SYSCTLBYNAME */
315 #elif defined(HAVE_LIBSTATGRAB)
316 /* nothing to initialize */
317 /* #endif HAVE_LIBSTATGRAB */
319 #elif defined(HAVE_PERFSTAT)
320 /* nothing to initialize */
321 #endif /* HAVE_PERFSTAT */
323 return (0);
324 } /* int init */
326 static void submit_value (int cpu_num, int cpu_state, const char *type, value_t value)
327 {
328 value_t values[1];
329 value_list_t vl = VALUE_LIST_INIT;
331 memcpy(&values[0], &value, sizeof(value));
333 vl.values = values;
334 vl.values_len = 1;
336 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
337 sstrncpy (vl.plugin, "cpu", sizeof (vl.plugin));
338 sstrncpy (vl.type, type, sizeof (vl.type));
339 sstrncpy (vl.type_instance, cpu_state_names[cpu_state],
340 sizeof (vl.type_instance));
342 if (cpu_num >= 0) {
343 ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
344 "%i", cpu_num);
345 }
346 plugin_dispatch_values (&vl);
347 }
349 static void submit_percent(int cpu_num, int cpu_state, gauge_t percent)
350 {
351 value_t value;
353 /* This function is called for all known CPU states, but each read
354 * method will only report a subset. The remaining states are left as
355 * NAN and we ignore them here. */
356 if (isnan (percent))
357 return;
359 value.gauge = percent;
360 submit_value (cpu_num, cpu_state, "percent", value);
361 }
363 static void submit_derive(int cpu_num, int cpu_state, derive_t derive)
364 {
365 value_t value;
367 value.derive = derive;
368 submit_value (cpu_num, cpu_state, "cpu", value);
369 }
371 /* Takes the zero-index number of a CPU and makes sure that the module-global
372 * cpu_states buffer is large enough. Returne ENOMEM on erorr. */
373 static int cpu_states_alloc (size_t cpu_num) /* {{{ */
374 {
375 cpu_state_t *tmp;
376 size_t sz;
378 sz = (((size_t) cpu_num) + 1) * COLLECTD_CPU_STATE_MAX;
379 assert (sz > 0);
381 /* We already have enough space. */
382 if (cpu_states_num >= sz)
383 return 0;
385 tmp = realloc (cpu_states, sz * sizeof (*cpu_states));
386 if (tmp == NULL)
387 {
388 ERROR ("cpu plugin: realloc failed.");
389 return (ENOMEM);
390 }
391 cpu_states = tmp;
392 tmp = cpu_states + cpu_states_num;
394 memset (tmp, 0, (sz - cpu_states_num) * sizeof (*cpu_states));
395 cpu_states_num = sz;
396 return 0;
397 } /* }}} cpu_states_alloc */
399 static cpu_state_t *get_cpu_state (size_t cpu_num, size_t state) /* {{{ */
400 {
401 size_t index = ((cpu_num * COLLECTD_CPU_STATE_MAX) + state);
403 if (index >= cpu_states_num)
404 return (NULL);
406 return (&cpu_states[index]);
407 } /* }}} cpu_state_t *get_cpu_state */
409 /* Populates the per-CPU COLLECTD_CPU_STATE_ACTIVE rate and the global rate_by_state
410 * array. */
411 static void aggregate (gauge_t *sum_by_state) /* {{{ */
412 {
413 for (size_t state = 0; state < COLLECTD_CPU_STATE_MAX; state++)
414 sum_by_state[state] = NAN;
416 for (size_t cpu_num = 0; cpu_num < global_cpu_num; cpu_num++)
417 {
418 cpu_state_t *this_cpu_states = get_cpu_state (cpu_num, 0);
420 this_cpu_states[COLLECTD_CPU_STATE_ACTIVE].rate = NAN;
422 for (size_t state = 0; state < COLLECTD_CPU_STATE_ACTIVE; state++)
423 {
424 if (!this_cpu_states[state].has_value)
425 continue;
427 RATE_ADD (sum_by_state[state], this_cpu_states[state].rate);
428 if (state != COLLECTD_CPU_STATE_IDLE)
429 RATE_ADD (this_cpu_states[COLLECTD_CPU_STATE_ACTIVE].rate, this_cpu_states[state].rate);
430 }
432 if (!isnan (this_cpu_states[COLLECTD_CPU_STATE_ACTIVE].rate))
433 this_cpu_states[COLLECTD_CPU_STATE_ACTIVE].has_value = 1;
435 RATE_ADD (sum_by_state[COLLECTD_CPU_STATE_ACTIVE], this_cpu_states[COLLECTD_CPU_STATE_ACTIVE].rate);
436 }
437 } /* }}} void aggregate */
439 /* Commits (dispatches) the values for one CPU or the global aggregation.
440 * cpu_num is the index of the CPU to be committed or -1 in case of the global
441 * aggregation. rates is a pointer to COLLECTD_CPU_STATE_MAX gauge_t values holding the
442 * current rate; each rate may be NAN. Calculates the percentage of each state
443 * and dispatches the metric. */
444 static void cpu_commit_one (int cpu_num, /* {{{ */
445 gauge_t rates[static COLLECTD_CPU_STATE_MAX])
446 {
447 gauge_t sum;
449 sum = rates[COLLECTD_CPU_STATE_ACTIVE];
450 RATE_ADD (sum, rates[COLLECTD_CPU_STATE_IDLE]);
452 if (!report_by_state)
453 {
454 gauge_t percent = 100.0 * rates[COLLECTD_CPU_STATE_ACTIVE] / sum;
455 submit_percent (cpu_num, COLLECTD_CPU_STATE_ACTIVE, percent);
456 return;
457 }
459 for (size_t state = 0; state < COLLECTD_CPU_STATE_ACTIVE; state++)
460 {
461 gauge_t percent = 100.0 * rates[state] / sum;
462 submit_percent (cpu_num, state, percent);
463 }
464 } /* }}} void cpu_commit_one */
466 /* Commits the number of cores */
467 static void cpu_commit_num_cpu (gauge_t num_cpu) /* {{{ */
468 {
469 //// static void submit_value (int cpu_num, int cpu_state, const char *type, value_t value)
470 value_t values[1];
471 value_list_t vl = VALUE_LIST_INIT;
473 /// memcpy(&values[0], &value, sizeof(value));
474 values[0].gauge = num_cpu;
476 vl.values = values;
477 vl.values_len = 1;
479 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
480 sstrncpy (vl.plugin, "cpu", sizeof (vl.plugin));
481 sstrncpy (vl.type, "gauge", sizeof (vl.type));
482 sstrncpy (vl.type_instance, "ncpu",
483 sizeof (vl.type_instance));
485 plugin_dispatch_values (&vl);
486 } /* }}} void cpu_commit_num_cpu */
488 /* Resets the internal aggregation. This is called by the read callback after
489 * each iteration / after each call to cpu_commit(). */
490 static void cpu_reset (void) /* {{{ */
491 {
492 for (size_t i = 0; i < cpu_states_num; i++)
493 cpu_states[i].has_value = 0;
495 global_cpu_num = 0;
496 } /* }}} void cpu_reset */
498 /* Legacy behavior: Dispatches the raw derive values without any aggregation. */
499 static void cpu_commit_without_aggregation (void) /* {{{ */
500 {
501 for (int state = 0; state < COLLECTD_CPU_STATE_ACTIVE; state++)
502 {
503 for (size_t cpu_num = 0; cpu_num < global_cpu_num; cpu_num++)
504 {
505 cpu_state_t *s = get_cpu_state (cpu_num, state);
507 if (!s->has_value)
508 continue;
510 submit_derive ((int) cpu_num, (int) state, s->conv.last_value.derive);
511 }
512 }
513 } /* }}} void cpu_commit_without_aggregation */
515 /* Aggregates the internal state and dispatches the metrics. */
516 static void cpu_commit (void) /* {{{ */
517 {
518 gauge_t global_rates[COLLECTD_CPU_STATE_MAX] = {
519 NAN, NAN, NAN, NAN, NAN, NAN, NAN, NAN, NAN, NAN /* Batman! */
520 };
522 if (report_num_cpu)
523 {
524 cpu_commit_num_cpu ((gauge_t) global_cpu_num);
525 }
527 if (report_by_state && report_by_cpu && !report_percent)
528 {
529 cpu_commit_without_aggregation ();
530 return;
531 }
533 aggregate (global_rates);
535 if (!report_by_cpu)
536 {
537 cpu_commit_one (-1, global_rates);
538 return;
539 }
541 for (size_t cpu_num = 0; cpu_num < global_cpu_num; cpu_num++)
542 {
543 cpu_state_t *this_cpu_states = get_cpu_state (cpu_num, 0);
544 gauge_t local_rates[COLLECTD_CPU_STATE_MAX] = {
545 NAN, NAN, NAN, NAN, NAN, NAN, NAN, NAN, NAN, NAN
546 };
548 for (size_t state = 0; state < COLLECTD_CPU_STATE_MAX; state++)
549 if (this_cpu_states[state].has_value)
550 local_rates[state] = this_cpu_states[state].rate;
552 cpu_commit_one ((int) cpu_num, local_rates);
553 }
554 } /* }}} void cpu_commit */
556 /* Adds a derive value to the internal state. This should be used by each read
557 * function for each state. At the end of the iteration, the read function
558 * should call cpu_commit(). */
559 static int cpu_stage (size_t cpu_num, size_t state, derive_t d, cdtime_t now) /* {{{ */
560 {
561 int status;
562 cpu_state_t *s;
563 gauge_t rate = NAN;
564 value_t val = {.derive = d};
566 if (state >= COLLECTD_CPU_STATE_ACTIVE)
567 return (EINVAL);
569 status = cpu_states_alloc (cpu_num);
570 if (status != 0)
571 return (status);
573 if (global_cpu_num <= cpu_num)
574 global_cpu_num = cpu_num + 1;
576 s = get_cpu_state (cpu_num, state);
578 status = value_to_rate (&rate, val, DS_TYPE_DERIVE, now, &s->conv);
579 if (status != 0)
580 return (status);
582 s->rate = rate;
583 s->has_value = 1;
584 return (0);
585 } /* }}} int cpu_stage */
587 static int cpu_read (void)
588 {
589 cdtime_t now = cdtime ();
591 #if PROCESSOR_CPU_LOAD_INFO /* {{{ */
592 kern_return_t status;
594 processor_cpu_load_info_data_t cpu_info;
595 mach_msg_type_number_t cpu_info_len;
597 host_t cpu_host;
599 for (int cpu = 0; cpu < cpu_list_len; cpu++)
600 {
601 cpu_host = 0;
602 cpu_info_len = PROCESSOR_BASIC_INFO_COUNT;
604 status = processor_info (cpu_list[cpu], PROCESSOR_CPU_LOAD_INFO, &cpu_host,
605 (processor_info_t) &cpu_info, &cpu_info_len);
606 if (status != KERN_SUCCESS)
607 {
608 ERROR ("cpu plugin: processor_info (PROCESSOR_CPU_LOAD_INFO) failed: %s",
609 mach_error_string (status));
610 continue;
611 }
613 if (cpu_info_len < CPU_STATE_MAX)
614 {
615 ERROR ("cpu plugin: processor_info returned only %i elements..", cpu_info_len);
616 continue;
617 }
619 cpu_stage (cpu, COLLECTD_CPU_STATE_USER, (derive_t) cpu_info.cpu_ticks[CPU_STATE_USER], now);
620 cpu_stage (cpu, COLLECTD_CPU_STATE_NICE, (derive_t) cpu_info.cpu_ticks[CPU_STATE_NICE], now);
621 cpu_stage (cpu, COLLECTD_CPU_STATE_SYSTEM, (derive_t) cpu_info.cpu_ticks[CPU_STATE_SYSTEM], now);
622 cpu_stage (cpu, COLLECTD_CPU_STATE_IDLE, (derive_t) cpu_info.cpu_ticks[CPU_STATE_IDLE], now);
623 }
624 /* }}} #endif PROCESSOR_CPU_LOAD_INFO */
626 #elif defined(KERNEL_LINUX) /* {{{ */
627 int cpu;
628 FILE *fh;
629 char buf[1024];
631 char *fields[9];
632 int numfields;
634 if ((fh = fopen ("/proc/stat", "r")) == NULL)
635 {
636 char errbuf[1024];
637 ERROR ("cpu plugin: fopen (/proc/stat) failed: %s",
638 sstrerror (errno, errbuf, sizeof (errbuf)));
639 return (-1);
640 }
642 while (fgets (buf, 1024, fh) != NULL)
643 {
644 if (strncmp (buf, "cpu", 3))
645 continue;
646 if ((buf[3] < '0') || (buf[3] > '9'))
647 continue;
649 numfields = strsplit (buf, fields, 9);
650 if (numfields < 5)
651 continue;
653 cpu = atoi (fields[0] + 3);
655 cpu_stage (cpu, COLLECTD_CPU_STATE_USER, (derive_t) atoll(fields[1]), now);
656 cpu_stage (cpu, COLLECTD_CPU_STATE_NICE, (derive_t) atoll(fields[2]), now);
657 cpu_stage (cpu, COLLECTD_CPU_STATE_SYSTEM, (derive_t) atoll(fields[3]), now);
658 cpu_stage (cpu, COLLECTD_CPU_STATE_IDLE, (derive_t) atoll(fields[4]), now);
660 if (numfields >= 8)
661 {
662 cpu_stage (cpu, COLLECTD_CPU_STATE_WAIT, (derive_t) atoll(fields[5]), now);
663 cpu_stage (cpu, COLLECTD_CPU_STATE_INTERRUPT, (derive_t) atoll(fields[6]), now);
664 cpu_stage (cpu, COLLECTD_CPU_STATE_SOFTIRQ, (derive_t) atoll(fields[7]), now);
666 if (numfields >= 9)
667 cpu_stage (cpu, COLLECTD_CPU_STATE_STEAL, (derive_t) atoll(fields[8]), now);
668 }
669 }
670 fclose (fh);
671 /* }}} #endif defined(KERNEL_LINUX) */
673 #elif defined(HAVE_LIBKSTAT) /* {{{ */
674 static cpu_stat_t cs;
676 if (kc == NULL)
677 return (-1);
679 for (int cpu = 0; cpu < numcpu; cpu++)
680 {
681 if (kstat_read (kc, ksp[cpu], &cs) == -1)
682 continue; /* error message? */
684 cpu_stage (ksp[cpu]->ks_instance, COLLECTD_CPU_STATE_IDLE, (derive_t) cs.cpu_sysinfo.cpu[CPU_IDLE], now);
685 cpu_stage (ksp[cpu]->ks_instance, COLLECTD_CPU_STATE_USER, (derive_t) cs.cpu_sysinfo.cpu[CPU_USER], now);
686 cpu_stage (ksp[cpu]->ks_instance, COLLECTD_CPU_STATE_SYSTEM, (derive_t) cs.cpu_sysinfo.cpu[CPU_KERNEL], now);
687 cpu_stage (ksp[cpu]->ks_instance, COLLECTD_CPU_STATE_WAIT, (derive_t) cs.cpu_sysinfo.cpu[CPU_WAIT], now);
688 }
689 /* }}} #endif defined(HAVE_LIBKSTAT) */
691 #elif CAN_USE_SYSCTL /* {{{ */
692 uint64_t cpuinfo[numcpu][CPUSTATES];
693 size_t cpuinfo_size;
694 int status;
696 if (numcpu < 1)
697 {
698 ERROR ("cpu plugin: Could not determine number of "
699 "installed CPUs using sysctl(3).");
700 return (-1);
701 }
703 memset (cpuinfo, 0, sizeof (cpuinfo));
705 #if defined(KERN_CPTIME2)
706 if (numcpu > 1) {
707 for (int i = 0; i < numcpu; i++) {
708 int mib[] = {CTL_KERN, KERN_CPTIME2, i};
710 cpuinfo_size = sizeof (cpuinfo[0]);
712 status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
713 cpuinfo[i], &cpuinfo_size, NULL, 0);
714 if (status == -1) {
715 char errbuf[1024];
716 ERROR ("cpu plugin: sysctl failed: %s.",
717 sstrerror (errno, errbuf, sizeof (errbuf)));
718 return (-1);
719 }
720 }
721 }
722 else
723 #endif /* defined(KERN_CPTIME2) */
724 {
725 int mib[] = {CTL_KERN, KERN_CPTIME};
726 long cpuinfo_tmp[CPUSTATES];
728 cpuinfo_size = sizeof(cpuinfo_tmp);
730 status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
731 &cpuinfo_tmp, &cpuinfo_size, NULL, 0);
732 if (status == -1)
733 {
734 char errbuf[1024];
735 ERROR ("cpu plugin: sysctl failed: %s.",
736 sstrerror (errno, errbuf, sizeof (errbuf)));
737 return (-1);
738 }
740 for(int i = 0; i < CPUSTATES; i++) {
741 cpuinfo[0][i] = cpuinfo_tmp[i];
742 }
743 }
745 for (int i = 0; i < numcpu; i++) {
746 cpu_stage (i, COLLECTD_CPU_STATE_USER, (derive_t) cpuinfo[i][CP_USER], now);
747 cpu_stage (i, COLLECTD_CPU_STATE_NICE, (derive_t) cpuinfo[i][CP_NICE], now);
748 cpu_stage (i, COLLECTD_CPU_STATE_SYSTEM, (derive_t) cpuinfo[i][CP_SYS], now);
749 cpu_stage (i, COLLECTD_CPU_STATE_IDLE, (derive_t) cpuinfo[i][CP_IDLE], now);
750 cpu_stage (i, COLLECTD_CPU_STATE_INTERRUPT, (derive_t) cpuinfo[i][CP_INTR], now);
751 }
752 /* }}} #endif CAN_USE_SYSCTL */
754 #elif defined(HAVE_SYSCTLBYNAME) && defined(HAVE_SYSCTL_KERN_CP_TIMES) /* {{{ */
755 long cpuinfo[maxcpu][CPUSTATES];
756 size_t cpuinfo_size;
758 memset (cpuinfo, 0, sizeof (cpuinfo));
760 cpuinfo_size = sizeof (cpuinfo);
761 if (sysctlbyname("kern.cp_times", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
762 {
763 char errbuf[1024];
764 ERROR ("cpu plugin: sysctlbyname failed: %s.",
765 sstrerror (errno, errbuf, sizeof (errbuf)));
766 return (-1);
767 }
769 for (int i = 0; i < numcpu; i++) {
770 cpu_stage (i, COLLECTD_CPU_STATE_USER, (derive_t) cpuinfo[i][CP_USER], now);
771 cpu_stage (i, COLLECTD_CPU_STATE_NICE, (derive_t) cpuinfo[i][CP_NICE], now);
772 cpu_stage (i, COLLECTD_CPU_STATE_SYSTEM, (derive_t) cpuinfo[i][CP_SYS], now);
773 cpu_stage (i, COLLECTD_CPU_STATE_IDLE, (derive_t) cpuinfo[i][CP_IDLE], now);
774 cpu_stage (i, COLLECTD_CPU_STATE_INTERRUPT, (derive_t) cpuinfo[i][CP_INTR], now);
775 }
776 /* }}} #endif HAVE_SYSCTL_KERN_CP_TIMES */
778 #elif defined(HAVE_SYSCTLBYNAME) /* {{{ */
779 long cpuinfo[CPUSTATES];
780 size_t cpuinfo_size;
782 cpuinfo_size = sizeof (cpuinfo);
784 if (sysctlbyname("kern.cp_time", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
785 {
786 char errbuf[1024];
787 ERROR ("cpu plugin: sysctlbyname failed: %s.",
788 sstrerror (errno, errbuf, sizeof (errbuf)));
789 return (-1);
790 }
792 cpu_stage (0, COLLECTD_CPU_STATE_USER, (derive_t) cpuinfo[CP_USER], now);
793 cpu_stage (0, COLLECTD_CPU_STATE_NICE, (derive_t) cpuinfo[CP_NICE], now);
794 cpu_stage (0, COLLECTD_CPU_STATE_SYSTEM, (derive_t) cpuinfo[CP_SYS], now);
795 cpu_stage (0, COLLECTD_CPU_STATE_IDLE, (derive_t) cpuinfo[CP_IDLE], now);
796 cpu_stage (0, COLLECTD_CPU_STATE_INTERRUPT, (derive_t) cpuinfo[CP_INTR], now);
797 /* }}} #endif HAVE_SYSCTLBYNAME */
799 #elif defined(HAVE_LIBSTATGRAB) /* {{{ */
800 sg_cpu_stats *cs;
801 cs = sg_get_cpu_stats ();
803 if (cs == NULL)
804 {
805 ERROR ("cpu plugin: sg_get_cpu_stats failed.");
806 return (-1);
807 }
809 cpu_state (0, COLLECTD_CPU_STATE_IDLE, (derive_t) cs->idle);
810 cpu_state (0, COLLECTD_CPU_STATE_NICE, (derive_t) cs->nice);
811 cpu_state (0, COLLECTD_CPU_STATE_SWAP, (derive_t) cs->swap);
812 cpu_state (0, COLLECTD_CPU_STATE_SYSTEM, (derive_t) cs->kernel);
813 cpu_state (0, COLLECTD_CPU_STATE_USER, (derive_t) cs->user);
814 cpu_state (0, COLLECTD_CPU_STATE_WAIT, (derive_t) cs->iowait);
815 /* }}} #endif HAVE_LIBSTATGRAB */
817 #elif defined(HAVE_PERFSTAT) /* {{{ */
818 perfstat_id_t id;
819 int cpus;
821 numcpu = perfstat_cpu(NULL, NULL, sizeof(perfstat_cpu_t), 0);
822 if(numcpu == -1)
823 {
824 char errbuf[1024];
825 WARNING ("cpu plugin: perfstat_cpu: %s",
826 sstrerror (errno, errbuf, sizeof (errbuf)));
827 return (-1);
828 }
830 if (pnumcpu != numcpu || perfcpu == NULL)
831 {
832 free(perfcpu);
833 perfcpu = malloc(numcpu * sizeof(perfstat_cpu_t));
834 }
835 pnumcpu = numcpu;
837 id.name[0] = '\0';
838 if ((cpus = perfstat_cpu(&id, perfcpu, sizeof(perfstat_cpu_t), numcpu)) < 0)
839 {
840 char errbuf[1024];
841 WARNING ("cpu plugin: perfstat_cpu: %s",
842 sstrerror (errno, errbuf, sizeof (errbuf)));
843 return (-1);
844 }
846 for (int i = 0; i < cpus; i++)
847 {
848 cpu_stage (i, COLLECTD_CPU_STATE_IDLE, (derive_t) perfcpu[i].idle, now);
849 cpu_stage (i, COLLECTD_CPU_STATE_SYSTEM, (derive_t) perfcpu[i].sys, now);
850 cpu_stage (i, COLLECTD_CPU_STATE_USER, (derive_t) perfcpu[i].user, now);
851 cpu_stage (i, COLLECTD_CPU_STATE_WAIT, (derive_t) perfcpu[i].wait, now);
852 }
853 #endif /* }}} HAVE_PERFSTAT */
855 cpu_commit ();
856 cpu_reset ();
857 return (0);
858 }
860 void module_register (void)
861 {
862 plugin_register_init ("cpu", init);
863 plugin_register_config ("cpu", cpu_config, config_keys, config_keys_num);
864 plugin_register_read ("cpu", cpu_read);
865 } /* void module_register */
867 /* vim: set sw=8 sts=8 noet fdm=marker : */