1 /**
2 * collectd - src/processes.c
3 * Copyright (C) 2005 Lyonel Vincent
4 * Copyright (C) 2006 Florian Forster (Mach code)
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Lyonel Vincent <lyonel at ezix.org>
22 * Florian octo Forster <octo at verplant.org>
23 **/
25 #include "collectd.h"
26 #include "common.h"
27 #include "plugin.h"
28 #include "utils_debug.h"
30 /* Include header files for the mach system, if they exist.. */
31 #if HAVE_MACH_MACH_INIT_H
32 # include <mach/mach_init.h>
33 #endif
34 #if HAVE_MACH_HOST_PRIV_H
35 # include <mach/host_priv.h>
36 #endif
37 #if HAVE_MACH_MACH_ERROR_H
38 # include <mach/mach_error.h>
39 #endif
40 #if HAVE_MACH_MACH_HOST_H
41 # include <mach/mach_host.h>
42 #endif
43 #if HAVE_MACH_MACH_PORT_H
44 # include <mach/mach_port.h>
45 #endif
46 #if HAVE_MACH_MACH_TYPES_H
47 # include <mach/mach_types.h>
48 #endif
49 #if HAVE_MACH_MESSAGE_H
50 # include <mach/message.h>
51 #endif
52 #if HAVE_MACH_PROCESSOR_SET_H
53 # include <mach/processor_set.h>
54 #endif
55 #if HAVE_MACH_TASK_H
56 # include <mach/task.h>
57 #endif
58 #if HAVE_MACH_THREAD_ACT_H
59 # include <mach/thread_act.h>
60 #endif
61 #if HAVE_MACH_VM_REGION_H
62 # include <mach/vm_region.h>
63 #endif
64 #if HAVE_MACH_VM_MAP_H
65 # include <mach/vm_map.h>
66 #endif
67 #if HAVE_MACH_VM_PROT_H
68 # include <mach/vm_prot.h>
69 #endif
71 #define MODULE_NAME "processes"
73 #if HAVE_THREAD_INFO || KERNEL_LINUX
74 # define PROCESSES_HAVE_READ 1
75 #else
76 # define PROCESSES_HAVE_READ 0
77 #endif
79 #define BUFSIZE 256
81 static char *ps_file = "processes.rrd";
83 static char *ds_def[] =
84 {
85 "DS:running:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
86 "DS:sleeping:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
87 "DS:zombies:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
88 "DS:stopped:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
89 "DS:paging:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
90 "DS:blocked:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
91 NULL
92 };
93 static int ds_num = 6;
95 typedef struct procstat
96 {
97 #define PROCSTAT_NAME_LEN 256
98 char name[PROCSTAT_NAME_LEN];
99 unsigned int num_proc;
100 unsigned int num_lwp;
101 unsigned int vmem_rss;
102 unsigned int vmem_minflt;
103 unsigned int vmem_majflt;
104 unsigned int cpu_user;
105 unsigned int cpu_system;
106 struct procstat *next;
107 } procstat_t;
109 #if HAVE_THREAD_INFO
110 static mach_port_t port_host_self;
111 static mach_port_t port_task_self;
113 static processor_set_name_array_t pset_list;
114 static mach_msg_type_number_t pset_list_len;
115 /* #endif HAVE_THREAD_INFO */
117 #elif KERNEL_LINUX
118 /* No global variables */
119 #endif /* KERNEL_LINUX */
121 static void ps_list_add (procstat_t *list, procstat_t *entry)
122 {
123 procstat_t *ptr;
125 ptr = list;
126 while ((ptr != NULL) && (strcmp (ptr->name, entry->name) != 0))
127 ptr = ptr->next;
129 if (ptr == NULL)
130 return;
132 ptr->num_proc += entry->num_proc;
133 ptr->num_lwp += entry->num_lwp;
134 ptr->vmem_rss += entry->vmem_rss;
135 ptr->vmem_minflt += entry->vmem_minflt;
136 ptr->vmem_maxflt += entry->vmem_maxflt;
137 ptr->cpu_user += entry->cpu_user;
138 ptr->cpu_system += entry->cpu_system;
139 }
141 static void ps_list_reset (procstat_t *ps)
142 {
143 while (ps != NULL)
144 {
145 ps->num_proc = 0;
146 ps->num_lwp = 0;
147 ps->vmem_rss = 0;
148 ps->vmem_minflt = 0;
149 ps->vmem_maxflt = 0;
150 ps->cpu_user = 0;
151 ps->cpu_system = 0;
152 ps = ps->next;
153 }
154 }
156 static int ps_config (char *key, char *value)
157 {
158 }
160 static void ps_init (void)
161 {
162 #if HAVE_THREAD_INFO
163 kern_return_t status;
165 port_host_self = mach_host_self ();
166 port_task_self = mach_task_self ();
168 if (pset_list != NULL)
169 {
170 vm_deallocate (port_task_self,
171 (vm_address_t) pset_list,
172 pset_list_len * sizeof (processor_set_t));
173 pset_list = NULL;
174 pset_list_len = 0;
175 }
177 if ((status = host_processor_sets (port_host_self,
178 &pset_list,
179 &pset_list_len)) != KERN_SUCCESS)
180 {
181 syslog (LOG_ERR, "host_processor_sets failed: %s\n",
182 mach_error_string (status));
183 pset_list = NULL;
184 pset_list_len = 0;
185 return;
186 }
187 /* #endif HAVE_THREAD_INFO */
189 #elif KERNEL_LINUX
190 /* No init */
191 #endif /* KERNEL_LINUX */
193 return;
194 }
196 static void ps_write (char *host, char *inst, char *val)
197 {
198 rrd_update_file (host, ps_file, val, ds_def, ds_num);
199 }
201 #if PROCESSES_HAVE_READ
202 static void ps_submit (int running,
203 int sleeping,
204 int zombies,
205 int stopped,
206 int paging,
207 int blocked)
208 {
209 char buf[BUFSIZE];
211 if (snprintf (buf, BUFSIZE, "%u:%i:%i:%i:%i:%i:%i",
212 (unsigned int) curtime,
213 running, sleeping, zombies, stopped, paging,
214 blocked) >= BUFSIZE)
215 return;
217 plugin_submit (MODULE_NAME, "-", buf);
218 }
220 static void ps_read (void)
221 {
222 #if HAVE_THREAD_INFO
223 kern_return_t status;
225 int pset;
226 processor_set_t port_pset_priv;
228 int task;
229 task_array_t task_list;
230 mach_msg_type_number_t task_list_len;
232 int thread;
233 thread_act_array_t thread_list;
234 mach_msg_type_number_t thread_list_len;
235 thread_basic_info_data_t thread_data;
236 mach_msg_type_number_t thread_data_len;
238 int running = 0;
239 int sleeping = 0;
240 int zombies = 0;
241 int stopped = 0;
242 int blocked = 0;
244 /*
245 * The Mach-concept is a little different from the traditional UNIX
246 * concept: All the work is done in threads. Threads are contained in
247 * `tasks'. Therefore, `task status' doesn't make much sense, since
248 * it's actually a `thread status'.
249 * Tasks are assigned to sets of processors, so that's where you go to
250 * get a list.
251 */
252 for (pset = 0; pset < pset_list_len; pset++)
253 {
254 if ((status = host_processor_set_priv (port_host_self,
255 pset_list[pset],
256 &port_pset_priv)) != KERN_SUCCESS)
257 {
258 syslog (LOG_ERR, "host_processor_set_priv failed: %s\n",
259 mach_error_string (status));
260 continue;
261 }
263 if ((status = processor_set_tasks (port_pset_priv,
264 &task_list,
265 &task_list_len)) != KERN_SUCCESS)
266 {
267 syslog (LOG_ERR, "processor_set_tasks failed: %s\n",
268 mach_error_string (status));
269 mach_port_deallocate (port_task_self, port_pset_priv);
270 continue;
271 }
273 for (task = 0; task < task_list_len; task++)
274 {
275 status = task_threads (task_list[task], &thread_list,
276 &thread_list_len);
277 if (status != KERN_SUCCESS)
278 {
279 /* Apple's `top' treats this case a zombie. It
280 * makes sense to some extend: A `zombie'
281 * thread is nonsense, since the task/process
282 * is dead. */
283 zombies++;
284 DBG ("task_threads failed: %s",
285 mach_error_string (status));
286 if (task_list[task] != port_task_self)
287 mach_port_deallocate (port_task_self,
288 task_list[task]);
289 continue; /* with next task_list */
290 }
292 for (thread = 0; thread < thread_list_len; thread++)
293 {
294 thread_data_len = THREAD_BASIC_INFO_COUNT;
295 status = thread_info (thread_list[thread],
296 THREAD_BASIC_INFO,
297 (thread_info_t) &thread_data,
298 &thread_data_len);
299 if (status != KERN_SUCCESS)
300 {
301 syslog (LOG_ERR, "thread_info failed: %s\n",
302 mach_error_string (status));
303 if (task_list[task] != port_task_self)
304 mach_port_deallocate (port_task_self,
305 thread_list[thread]);
306 continue; /* with next thread_list */
307 }
309 switch (thread_data.run_state)
310 {
311 case TH_STATE_RUNNING:
312 running++;
313 break;
314 case TH_STATE_STOPPED:
315 /* What exactly is `halted'? */
316 case TH_STATE_HALTED:
317 stopped++;
318 break;
319 case TH_STATE_WAITING:
320 sleeping++;
321 break;
322 case TH_STATE_UNINTERRUPTIBLE:
323 blocked++;
324 break;
325 /* There is no `zombie' case here,
326 * since there are no zombie-threads.
327 * There's only zombie tasks, which are
328 * handled above. */
329 default:
330 syslog (LOG_WARNING,
331 "Unknown thread status: %s",
332 thread_data.run_state);
333 break;
334 } /* switch (thread_data.run_state) */
336 if (task_list[task] != port_task_self)
337 {
338 status = mach_port_deallocate (port_task_self,
339 thread_list[thread]);
340 if (status != KERN_SUCCESS)
341 syslog (LOG_ERR, "mach_port_deallocate failed: %s",
342 mach_error_string (status));
343 }
344 } /* for (thread_list) */
346 if ((status = vm_deallocate (port_task_self,
347 (vm_address_t) thread_list,
348 thread_list_len * sizeof (thread_act_t)))
349 != KERN_SUCCESS)
350 {
351 syslog (LOG_ERR, "vm_deallocate failed: %s",
352 mach_error_string (status));
353 }
354 thread_list = NULL;
355 thread_list_len = 0;
357 /* Only deallocate the task port, if it isn't our own.
358 * Don't know what would happen in that case, but this
359 * is what Apple's top does.. ;) */
360 if (task_list[task] != port_task_self)
361 {
362 status = mach_port_deallocate (port_task_self,
363 task_list[task]);
364 if (status != KERN_SUCCESS)
365 syslog (LOG_ERR, "mach_port_deallocate failed: %s",
366 mach_error_string (status));
367 }
368 } /* for (task_list) */
370 if ((status = vm_deallocate (port_task_self,
371 (vm_address_t) task_list,
372 task_list_len * sizeof (task_t))) != KERN_SUCCESS)
373 {
374 syslog (LOG_ERR, "vm_deallocate failed: %s",
375 mach_error_string (status));
376 }
377 task_list = NULL;
378 task_list_len = 0;
380 if ((status = mach_port_deallocate (port_task_self, port_pset_priv))
381 != KERN_SUCCESS)
382 {
383 syslog (LOG_ERR, "mach_port_deallocate failed: %s",
384 mach_error_string (status));
385 }
386 } /* for (pset_list) */
388 ps_submit (running, sleeping, zombies, stopped, -1, blocked);
389 /* #endif HAVE_THREAD_INFO */
391 #elif KERNEL_LINUX
392 int running = 0;
393 int sleeping = 0;
394 int zombies = 0;
395 int stopped = 0;
396 int paging = 0;
397 int blocked = 0;
399 char buf[BUFSIZE];
400 char filename[20]; /* need 17 bytes */
401 char *fields[BUFSIZE];
403 struct dirent *ent;
404 DIR *proc;
405 FILE *fh;
407 running = sleeping = zombies = stopped = paging = blocked = 0;
409 if ((proc = opendir ("/proc")) == NULL)
410 {
411 syslog (LOG_ERR, "Cannot open `/proc': %s", strerror (errno));
412 return;
413 }
415 while ((ent = readdir (proc)) != NULL)
416 {
417 if (!isdigit (ent->d_name[0]))
418 continue;
420 if (snprintf (filename, 20, "/proc/%s/stat", ent->d_name) >= 20)
421 continue;
423 if ((fh = fopen (filename, "r")) == NULL)
424 {
425 syslog (LOG_ERR, "Cannot open `%s': %s", filename, strerror (errno));
426 continue;
427 }
429 if (fgets (buf, BUFSIZE, fh) == NULL)
430 {
431 fclose (fh);
432 continue;
433 }
435 fclose (fh);
437 if (strsplit (buf, fields, BUFSIZE) < 3)
438 continue;
440 switch (fields[2][0])
441 {
442 case 'R': running++; break;
443 case 'S': sleeping++; break;
444 case 'D': blocked++; break;
445 case 'Z': zombies++; break;
446 case 'T': stopped++; break;
447 case 'W': paging++; break;
448 }
449 }
451 closedir(proc);
453 ps_submit (running, sleeping, zombies, stopped, paging, blocked);
454 #endif /* KERNEL_LINUX */
455 }
456 #else
457 # define ps_read NULL
458 #endif /* PROCESSES_HAVE_READ */
460 void module_register (void)
461 {
462 plugin_register (MODULE_NAME, ps_init, ps_read, ps_write);
463 }
465 #undef BUFSIZE
466 #undef MODULE_NAME