f1aa4abe6f61098936fe99f0b91cb86e7147eeaf
1 /**
2 * collectd - src/cpu.c
3 * Copyright (C) 2005-2010 Florian octo Forster
4 * Copyright (C) 2008 Oleg King
5 * Copyright (C) 2009 Simon Kuhnle
6 * Copyright (C) 2009 Manuel Sanmartin
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; only version 2 of the License is applicable.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * Authors:
22 * Florian octo Forster <octo at verplant.org>
23 * Oleg King <king2 at kaluga.ru>
24 * Simon Kuhnle <simon at blarzwurst.de>
25 * Manuel Sanmartin
26 **/
28 #include "collectd.h"
29 #include "common.h"
30 #include "plugin.h"
32 #ifdef HAVE_MACH_KERN_RETURN_H
33 # include <mach/kern_return.h>
34 #endif
35 #ifdef HAVE_MACH_MACH_INIT_H
36 # include <mach/mach_init.h>
37 #endif
38 #ifdef HAVE_MACH_HOST_PRIV_H
39 # include <mach/host_priv.h>
40 #endif
41 #if HAVE_MACH_MACH_ERROR_H
42 # include <mach/mach_error.h>
43 #endif
44 #ifdef HAVE_MACH_PROCESSOR_INFO_H
45 # include <mach/processor_info.h>
46 #endif
47 #ifdef HAVE_MACH_PROCESSOR_H
48 # include <mach/processor.h>
49 #endif
50 #ifdef HAVE_MACH_VM_MAP_H
51 # include <mach/vm_map.h>
52 #endif
54 #ifdef HAVE_LIBKSTAT
55 # include <sys/sysinfo.h>
56 #endif /* HAVE_LIBKSTAT */
58 #if (defined(HAVE_SYSCTL) && HAVE_SYSCTL) \
59 || (defined(HAVE_SYSCTLBYNAME) && HAVE_SYSCTLBYNAME)
60 # ifdef HAVE_SYS_SYSCTL_H
61 # include <sys/sysctl.h>
62 # endif
64 # ifdef HAVE_SYS_DKSTAT_H
65 # include <sys/dkstat.h>
66 # endif
68 # if !defined(CP_USER) || !defined(CP_NICE) || !defined(CP_SYS) || !defined(CP_INTR) || !defined(CP_IDLE) || !defined(CPUSTATES)
69 # define CP_USER 0
70 # define CP_NICE 1
71 # define CP_SYS 2
72 # define CP_INTR 3
73 # define CP_IDLE 4
74 # define CPUSTATES 5
75 # endif
76 #endif /* HAVE_SYSCTL || HAVE_SYSCTLBYNAME */
78 #if HAVE_SYSCTL
79 # if defined(CTL_HW) && defined(HW_NCPU) \
80 && defined(CTL_KERN) && defined(KERN_CPTIME) && defined(CPUSTATES)
81 # define CAN_USE_SYSCTL 1
82 # else
83 # define CAN_USE_SYSCTL 0
84 # endif
85 #else
86 # define CAN_USE_SYSCTL 0
87 #endif
89 #if HAVE_STATGRAB_H
90 # include <statgrab.h>
91 #endif
93 # ifdef HAVE_PERFSTAT
94 # include <sys/protosw.h>
95 # include <libperfstat.h>
96 # endif /* HAVE_PERFSTAT */
98 #if !PROCESSOR_CPU_LOAD_INFO && !KERNEL_LINUX && !HAVE_LIBKSTAT \
99 && !CAN_USE_SYSCTL && !HAVE_SYSCTLBYNAME && !HAVE_LIBSTATGRAB && !HAVE_PERFSTAT
100 # error "No applicable input method."
101 #endif
103 #ifdef PROCESSOR_CPU_LOAD_INFO
104 static mach_port_t port_host;
105 static processor_port_array_t cpu_list;
106 static mach_msg_type_number_t cpu_list_len;
108 #if PROCESSOR_TEMPERATURE
109 static int cpu_temp_retry_counter = 0;
110 static int cpu_temp_retry_step = 1;
111 static int cpu_temp_retry_max = 1;
112 #endif /* PROCESSOR_TEMPERATURE */
113 /* #endif PROCESSOR_CPU_LOAD_INFO */
115 #elif defined(KERNEL_LINUX)
116 /* no variables needed */
117 /* #endif KERNEL_LINUX */
119 #elif defined(HAVE_LIBKSTAT)
120 /* colleague tells me that Sun doesn't sell systems with more than 100 or so CPUs.. */
121 # define MAX_NUMCPU 256
122 extern kstat_ctl_t *kc;
123 static kstat_t *ksp[MAX_NUMCPU];
124 static int numcpu;
125 /* #endif HAVE_LIBKSTAT */
127 #elif CAN_USE_SYSCTL
128 static int numcpu;
129 /* #endif CAN_USE_SYSCTL */
131 #elif defined(HAVE_SYSCTLBYNAME)
132 static int numcpu;
133 # ifdef HAVE_SYSCTL_KERN_CP_TIMES
134 static int maxcpu;
135 # endif /* HAVE_SYSCTL_KERN_CP_TIMES */
136 /* #endif HAVE_SYSCTLBYNAME */
138 #elif defined(HAVE_LIBSTATGRAB)
139 /* no variables needed */
140 /* #endif HAVE_LIBSTATGRAB */
142 #elif defined(HAVE_PERFSTAT)
143 static perfstat_cpu_t *perfcpu;
144 static int numcpu;
145 static int pnumcpu;
146 #endif /* HAVE_PERFSTAT */
148 static int init (void)
149 {
150 #if PROCESSOR_CPU_LOAD_INFO || PROCESSOR_TEMPERATURE
151 kern_return_t status;
153 port_host = mach_host_self ();
155 /* FIXME: Free `cpu_list' if it's not NULL */
156 if ((status = host_processors (port_host, &cpu_list, &cpu_list_len)) != KERN_SUCCESS)
157 {
158 ERROR ("cpu plugin: host_processors returned %i", (int) status);
159 cpu_list_len = 0;
160 return (-1);
161 }
163 DEBUG ("host_processors returned %i %s", (int) cpu_list_len, cpu_list_len == 1 ? "processor" : "processors");
164 INFO ("cpu plugin: Found %i processor%s.", (int) cpu_list_len, cpu_list_len == 1 ? "" : "s");
166 cpu_temp_retry_max = 86400 / CDTIME_T_TO_TIME_T (plugin_get_interval ());
167 /* #endif PROCESSOR_CPU_LOAD_INFO */
169 #elif defined(HAVE_LIBKSTAT)
170 kstat_t *ksp_chain;
172 numcpu = 0;
174 if (kc == NULL)
175 return (-1);
177 /* Solaris doesn't count linear.. *sigh* */
178 for (numcpu = 0, ksp_chain = kc->kc_chain;
179 (numcpu < MAX_NUMCPU) && (ksp_chain != NULL);
180 ksp_chain = ksp_chain->ks_next)
181 if (strncmp (ksp_chain->ks_module, "cpu_stat", 8) == 0)
182 ksp[numcpu++] = ksp_chain;
183 /* #endif HAVE_LIBKSTAT */
185 #elif CAN_USE_SYSCTL
186 size_t numcpu_size;
187 int mib[2] = {CTL_HW, HW_NCPU};
188 int status;
190 numcpu = 0;
191 numcpu_size = sizeof (numcpu);
193 status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
194 &numcpu, &numcpu_size, NULL, 0);
195 if (status == -1)
196 {
197 char errbuf[1024];
198 WARNING ("cpu plugin: sysctl: %s",
199 sstrerror (errno, errbuf, sizeof (errbuf)));
200 return (-1);
201 }
202 /* #endif CAN_USE_SYSCTL */
204 #elif defined (HAVE_SYSCTLBYNAME)
205 size_t numcpu_size;
207 numcpu_size = sizeof (numcpu);
209 if (sysctlbyname ("hw.ncpu", &numcpu, &numcpu_size, NULL, 0) < 0)
210 {
211 char errbuf[1024];
212 WARNING ("cpu plugin: sysctlbyname(hw.ncpu): %s",
213 sstrerror (errno, errbuf, sizeof (errbuf)));
214 return (-1);
215 }
217 #ifdef HAVE_SYSCTL_KERN_CP_TIMES
218 numcpu_size = sizeof (maxcpu);
220 if (sysctlbyname("kern.smp.maxcpus", &maxcpu, &numcpu_size, NULL, 0) < 0)
221 {
222 char errbuf[1024];
223 WARNING ("cpu plugin: sysctlbyname(kern.smp.maxcpus): %s",
224 sstrerror (errno, errbuf, sizeof (errbuf)));
225 return (-1);
226 }
227 #else
228 if (numcpu != 1)
229 NOTICE ("cpu: Only one processor supported when using `sysctlbyname' (found %i)", numcpu);
230 #endif
231 /* #endif HAVE_SYSCTLBYNAME */
233 #elif defined(HAVE_LIBSTATGRAB)
234 /* nothing to initialize */
235 /* #endif HAVE_LIBSTATGRAB */
237 #elif defined(HAVE_PERFSTAT)
238 /* nothing to initialize */
239 #endif /* HAVE_PERFSTAT */
241 return (0);
242 } /* int init */
244 static void submit (int cpu_num, const char *type_instance, derive_t value)
245 {
246 value_t values[1];
247 value_list_t vl = VALUE_LIST_INIT;
249 values[0].derive = value;
251 vl.values = values;
252 vl.values_len = 1;
253 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
254 sstrncpy (vl.plugin, "cpu", sizeof (vl.plugin));
255 ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
256 "%i", cpu_num);
257 sstrncpy (vl.type, "cpu", sizeof (vl.type));
258 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
260 plugin_dispatch_values (&vl);
261 }
263 static int cpu_read (void)
264 {
265 #if PROCESSOR_CPU_LOAD_INFO || PROCESSOR_TEMPERATURE
266 int cpu;
268 kern_return_t status;
270 #if PROCESSOR_CPU_LOAD_INFO
271 derive_t cpu_active;
272 processor_cpu_load_info_data_t cpu_info;
273 mach_msg_type_number_t cpu_info_len;
274 #endif
275 #if PROCESSOR_TEMPERATURE
276 processor_info_data_t cpu_temp;
277 mach_msg_type_number_t cpu_temp_len;
278 #endif
280 host_t cpu_host;
282 for (cpu = 0; cpu < cpu_list_len; cpu++)
283 {
284 #if PROCESSOR_CPU_LOAD_INFO
285 cpu_host = 0;
286 cpu_info_len = PROCESSOR_BASIC_INFO_COUNT;
288 if ((status = processor_info (cpu_list[cpu],
289 PROCESSOR_CPU_LOAD_INFO, &cpu_host,
290 (processor_info_t) &cpu_info, &cpu_info_len)) != KERN_SUCCESS)
291 {
292 ERROR ("cpu plugin: processor_info failed with status %i", (int) status);
293 continue;
294 }
296 if (cpu_info_len < CPU_STATE_MAX)
297 {
298 ERROR ("cpu plugin: processor_info returned only %i elements..", cpu_info_len);
299 continue;
300 }
302 submit (cpu, "user", (derive_t) cpu_info.cpu_ticks[CPU_STATE_USER]);
303 submit (cpu, "nice", (derive_t) cpu_info.cpu_ticks[CPU_STATE_NICE]);
304 submit (cpu, "system", (derive_t) cpu_info.cpu_ticks[CPU_STATE_SYSTEM]);
305 submit (cpu, "idle", (derive_t) cpu_info.cpu_ticks[CPU_STATE_IDLE]);
306 cpu_active = (derive_t) (cpu_info.cpu_ticks[CPU_STATE_USER] +
307 cpu_info.cpu_ticks[CPU_STATE_NICE] +
308 cpu_info.cpu_ticks[CPU_STATE_SYSTEM]);
309 submit (cpu, "active", cpu_active);
311 #endif /* PROCESSOR_CPU_LOAD_INFO */
312 #if PROCESSOR_TEMPERATURE
313 /*
314 * Not all Apple computers do have this ability. To minimize
315 * the messages sent to the syslog we do an exponential
316 * stepback if `processor_info' fails. We still try ~once a day
317 * though..
318 */
319 if (cpu_temp_retry_counter > 0)
320 {
321 cpu_temp_retry_counter--;
322 continue;
323 }
325 cpu_temp_len = PROCESSOR_INFO_MAX;
327 status = processor_info (cpu_list[cpu],
328 PROCESSOR_TEMPERATURE,
329 &cpu_host,
330 cpu_temp, &cpu_temp_len);
331 if (status != KERN_SUCCESS)
332 {
333 ERROR ("cpu plugin: processor_info failed: %s",
334 mach_error_string (status));
336 cpu_temp_retry_counter = cpu_temp_retry_step;
337 cpu_temp_retry_step *= 2;
338 if (cpu_temp_retry_step > cpu_temp_retry_max)
339 cpu_temp_retry_step = cpu_temp_retry_max;
341 continue;
342 }
344 if (cpu_temp_len != 1)
345 {
346 DEBUG ("processor_info (PROCESSOR_TEMPERATURE) returned %i elements..?",
347 (int) cpu_temp_len);
348 continue;
349 }
351 cpu_temp_retry_counter = 0;
352 cpu_temp_retry_step = 1;
353 #endif /* PROCESSOR_TEMPERATURE */
354 }
355 /* #endif PROCESSOR_CPU_LOAD_INFO */
357 #elif defined(KERNEL_LINUX)
358 int cpu;
359 derive_t cpu_active;
360 derive_t user, nice, syst, idle;
361 derive_t wait, intr, sitr; /* sitr == soft interrupt */
362 FILE *fh;
363 char buf[1024];
365 char *fields[9];
366 int numfields;
368 if ((fh = fopen ("/proc/stat", "r")) == NULL)
369 {
370 char errbuf[1024];
371 ERROR ("cpu plugin: fopen (/proc/stat) failed: %s",
372 sstrerror (errno, errbuf, sizeof (errbuf)));
373 return (-1);
374 }
376 while (fgets (buf, 1024, fh) != NULL)
377 {
378 if (strncmp (buf, "cpu", 3))
379 continue;
380 if ((buf[3] < '0') || (buf[3] > '9'))
381 continue;
383 numfields = strsplit (buf, fields, 9);
384 if (numfields < 5)
385 continue;
387 cpu = atoi (fields[0] + 3);
388 user = atoll (fields[1]);
389 nice = atoll (fields[2]);
390 syst = atoll (fields[3]);
391 idle = atoll (fields[4]);
393 submit (cpu, "user", user);
394 submit (cpu, "nice", nice);
395 submit (cpu, "system", syst);
396 submit (cpu, "idle", idle);
397 cpu_active = user + nice + syst;
399 if (numfields >= 8)
400 {
401 wait = atoll (fields[5]);
402 intr = atoll (fields[6]);
403 sitr = atoll (fields[7]);
405 submit (cpu, "wait", wait);
406 submit (cpu, "interrupt", intr);
407 submit (cpu, "softirq", sitr);
409 cpu_active += wait + intr + sitr;
411 if (numfields >= 9)
412 cpu_active += (derive_t) atoll (fields[8]);
413 submit (cpu, "steal", atoll (fields[8]));
414 }
415 submit (cpu, "active", cpu_active);
416 }
418 fclose (fh);
419 /* #endif defined(KERNEL_LINUX) */
421 #elif defined(HAVE_LIBKSTAT)
422 int cpu;
423 derive_t user, syst, idle, wait;
424 static cpu_stat_t cs;
426 if (kc == NULL)
427 return (-1);
429 for (cpu = 0; cpu < numcpu; cpu++)
430 {
431 if (kstat_read (kc, ksp[cpu], &cs) == -1)
432 continue; /* error message? */
434 idle = (derive_t) cs.cpu_sysinfo.cpu[CPU_IDLE];
435 user = (derive_t) cs.cpu_sysinfo.cpu[CPU_USER];
436 syst = (derive_t) cs.cpu_sysinfo.cpu[CPU_KERNEL];
437 wait = (derive_t) cs.cpu_sysinfo.cpu[CPU_WAIT];
439 submit (ksp[cpu]->ks_instance, "user", user);
440 submit (ksp[cpu]->ks_instance, "system", syst);
441 submit (ksp[cpu]->ks_instance, "idle", idle);
442 submit (ksp[cpu]->ks_instance, "wait", wait);
443 submit (ksp[cpu]->ks_instance, "active", user + syst + wait);
444 }
445 /* #endif defined(HAVE_LIBKSTAT) */
447 #elif CAN_USE_SYSCTL
448 uint64_t cpuinfo[numcpu][CPUSTATES];
449 size_t cpuinfo_size;
450 int status;
451 int i;
453 if (numcpu < 1)
454 {
455 ERROR ("cpu plugin: Could not determine number of "
456 "installed CPUs using sysctl(3).");
457 return (-1);
458 }
460 memset (cpuinfo, 0, sizeof (cpuinfo));
462 #if defined(KERN_CPTIME2)
463 if (numcpu > 1) {
464 for (i = 0; i < numcpu; i++) {
465 int mib[] = {CTL_KERN, KERN_CPTIME2, i};
467 cpuinfo_size = sizeof (cpuinfo[0]);
469 status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
470 cpuinfo[i], &cpuinfo_size, NULL, 0);
471 if (status == -1) {
472 char errbuf[1024];
473 ERROR ("cpu plugin: sysctl failed: %s.",
474 sstrerror (errno, errbuf, sizeof (errbuf)));
475 return (-1);
476 }
477 }
478 }
479 else
480 #endif /* defined(KERN_CPTIME2) */
481 {
482 int mib[] = {CTL_KERN, KERN_CPTIME};
483 long cpuinfo_tmp[CPUSTATES];
485 cpuinfo_size = sizeof(cpuinfo_tmp);
487 status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
488 &cpuinfo_tmp, &cpuinfo_size, NULL, 0);
489 if (status == -1)
490 {
491 char errbuf[1024];
492 ERROR ("cpu plugin: sysctl failed: %s.",
493 sstrerror (errno, errbuf, sizeof (errbuf)));
494 return (-1);
495 }
497 for(i = 0; i < CPUSTATES; i++) {
498 cpuinfo[0][i] = cpuinfo_tmp[i];
499 }
500 }
502 for (i = 0; i < numcpu; i++) {
503 submit (i, "user", cpuinfo[i][CP_USER]);
504 submit (i, "nice", cpuinfo[i][CP_NICE]);
505 submit (i, "system", cpuinfo[i][CP_SYS]);
506 submit (i, "idle", cpuinfo[i][CP_IDLE]);
507 submit (i, "interrupt", cpuinfo[i][CP_INTR]);
508 submit (i, "active", cpuinfo[i][CP_USER] +
509 cpuinfo[i][CP_NICE] +
510 cpuinfo[i][CP_SYS] +
511 cpuinfo[i][CP_INTR]);
512 }
513 /* #endif CAN_USE_SYSCTL */
514 #elif defined(HAVE_SYSCTLBYNAME) && defined(HAVE_SYSCTL_KERN_CP_TIMES)
515 long cpuinfo[maxcpu][CPUSTATES];
516 size_t cpuinfo_size;
517 int i;
519 memset (cpuinfo, 0, sizeof (cpuinfo));
521 cpuinfo_size = sizeof (cpuinfo);
522 if (sysctlbyname("kern.cp_times", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
523 {
524 char errbuf[1024];
525 ERROR ("cpu plugin: sysctlbyname failed: %s.",
526 sstrerror (errno, errbuf, sizeof (errbuf)));
527 return (-1);
528 }
530 for (i = 0; i < numcpu; i++) {
531 submit (i, "user", cpuinfo[i][CP_USER]);
532 submit (i, "nice", cpuinfo[i][CP_NICE]);
533 submit (i, "system", cpuinfo[i][CP_SYS]);
534 submit (i, "idle", cpuinfo[i][CP_IDLE]);
535 submit (i, "interrupt", cpuinfo[i][CP_INTR]);
536 submit (i, "active", cpuinfo[i][CP_USER] +
537 cpuinfo[i][CP_NICE] +
538 cpuinfo[i][CP_SYS] +
539 cpuinfo[i][CP_INTR]);
540 }
541 /* #endif HAVE_SYSCTL_KERN_CP_TIMES */
542 #elif defined(HAVE_SYSCTLBYNAME)
543 long cpuinfo[CPUSTATES];
544 size_t cpuinfo_size;
546 cpuinfo_size = sizeof (cpuinfo);
548 if (sysctlbyname("kern.cp_time", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
549 {
550 char errbuf[1024];
551 ERROR ("cpu plugin: sysctlbyname failed: %s.",
552 sstrerror (errno, errbuf, sizeof (errbuf)));
553 return (-1);
554 }
556 submit (0, "user", cpuinfo[CP_USER]);
557 submit (0, "nice", cpuinfo[CP_NICE]);
558 submit (0, "system", cpuinfo[CP_SYS]);
559 submit (0, "idle", cpuinfo[CP_IDLE]);
560 submit (0, "interrupt", cpuinfo[CP_INTR]);
561 submit (0, "active", cpuinfo[CP_USER] +
562 cpuinfo[CP_NICE] +
563 cpuinfo[CP_SYS] +
564 cpuinfo[CP_INTR]);
565 /* #endif HAVE_SYSCTLBYNAME */
567 #elif defined(HAVE_LIBSTATGRAB)
568 sg_cpu_stats *cs;
569 cs = sg_get_cpu_stats ();
571 if (cs == NULL)
572 {
573 ERROR ("cpu plugin: sg_get_cpu_stats failed.");
574 return (-1);
575 }
577 submit (0, "idle", (derive_t) cs->idle);
578 submit (0, "nice", (derive_t) cs->nice);
579 submit (0, "swap", (derive_t) cs->swap);
580 submit (0, "system", (derive_t) cs->kernel);
581 submit (0, "user", (derive_t) cs->user);
582 submit (0, "wait", (derive_t) cs->iowait);
583 submit (0, "active", (derive_t) cs->nice +
584 cs->swap +
585 cs->kernel +
586 cs->user +
587 cs->iowait +
588 cs->nice);
589 /* #endif HAVE_LIBSTATGRAB */
591 #elif defined(HAVE_PERFSTAT)
592 perfstat_id_t id;
593 int i, cpus;
595 numcpu = perfstat_cpu(NULL, NULL, sizeof(perfstat_cpu_t), 0);
596 if(numcpu == -1)
597 {
598 char errbuf[1024];
599 WARNING ("cpu plugin: perfstat_cpu: %s",
600 sstrerror (errno, errbuf, sizeof (errbuf)));
601 return (-1);
602 }
604 if (pnumcpu != numcpu || perfcpu == NULL)
605 {
606 if (perfcpu != NULL)
607 free(perfcpu);
608 perfcpu = malloc(numcpu * sizeof(perfstat_cpu_t));
609 }
610 pnumcpu = numcpu;
612 id.name[0] = '\0';
613 if ((cpus = perfstat_cpu(&id, perfcpu, sizeof(perfstat_cpu_t), numcpu)) < 0)
614 {
615 char errbuf[1024];
616 WARNING ("cpu plugin: perfstat_cpu: %s",
617 sstrerror (errno, errbuf, sizeof (errbuf)));
618 return (-1);
619 }
621 for (i = 0; i < cpus; i++)
622 {
623 submit (i, "idle", (derive_t) perfcpu[i].idle);
624 submit (i, "system", (derive_t) perfcpu[i].sys);
625 submit (i, "user", (derive_t) perfcpu[i].user);
626 submit (i, "wait", (derive_t) perfcpu[i].wait);
627 submit (i, "active", (derive_t) perfcpu[i].sys +
628 perfcpu[i].user +
629 perfcpu[i].wait);
630 }
631 #endif /* HAVE_PERFSTAT */
633 return (0);
634 }
636 void module_register (void)
637 {
638 plugin_register_init ("cpu", init);
639 plugin_register_read ("cpu", cpu_read);
640 } /* void module_register */