]>
Commit | Line | Data |
---|---|---|
718e3744 | 1 | /* Thread management routine |
2 | * Copyright (C) 1998, 2000 Kunihiro Ishiguro <kunihiro@zebra.org> | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra 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, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra 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 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | /* #define DEBUG */ | |
22 | ||
23 | #include <zebra.h> | |
308d14ae | 24 | #include <sys/resource.h> |
718e3744 | 25 | |
26 | #include "thread.h" | |
27 | #include "memory.h" | |
28 | #include "log.h" | |
e04ab74d | 29 | #include "hash.h" |
4becea72 | 30 | #include "pqueue.h" |
e04ab74d | 31 | #include "command.h" |
05c447dd | 32 | #include "sigevent.h" |
3bf2673b | 33 | #include "network.h" |
bd74dc61 | 34 | #include "jhash.h" |
fbcac826 | 35 | #include "frratomic.h" |
9ef9495e | 36 | #include "lib_errors.h" |
d6be5fb9 | 37 | |
d62a17ae | 38 | DEFINE_MTYPE_STATIC(LIB, THREAD, "Thread") |
4a1ab8e4 | 39 | DEFINE_MTYPE_STATIC(LIB, THREAD_MASTER, "Thread master") |
a6f235f3 | 40 | DEFINE_MTYPE_STATIC(LIB, THREAD_POLL, "Thread Poll Info") |
d62a17ae | 41 | DEFINE_MTYPE_STATIC(LIB, THREAD_STATS, "Thread stats") |
4a1ab8e4 | 42 | |
3b96b781 HT |
43 | #if defined(__APPLE__) |
44 | #include <mach/mach.h> | |
45 | #include <mach/mach_time.h> | |
46 | #endif | |
47 | ||
d62a17ae | 48 | #define AWAKEN(m) \ |
49 | do { \ | |
50 | static unsigned char wakebyte = 0x01; \ | |
51 | write(m->io_pipe[1], &wakebyte, 1); \ | |
52 | } while (0); | |
3bf2673b | 53 | |
62f44022 | 54 | /* control variable for initializer */ |
c17faa4b | 55 | static pthread_once_t init_once = PTHREAD_ONCE_INIT; |
e0bebc7c | 56 | pthread_key_t thread_current; |
6b0655a2 | 57 | |
c17faa4b | 58 | static pthread_mutex_t masters_mtx = PTHREAD_MUTEX_INITIALIZER; |
62f44022 QY |
59 | static struct list *masters; |
60 | ||
6655966d | 61 | static void thread_free(struct thread_master *master, struct thread *thread); |
6b0655a2 | 62 | |
62f44022 | 63 | /* CLI start ---------------------------------------------------------------- */ |
d62a17ae | 64 | static unsigned int cpu_record_hash_key(struct cpu_thread_history *a) |
e04ab74d | 65 | { |
883cc51d | 66 | int size = sizeof(a->func); |
bd74dc61 DS |
67 | |
68 | return jhash(&a->func, size, 0); | |
e04ab74d | 69 | } |
70 | ||
74df8d6d | 71 | static bool cpu_record_hash_cmp(const struct cpu_thread_history *a, |
d62a17ae | 72 | const struct cpu_thread_history *b) |
e04ab74d | 73 | { |
d62a17ae | 74 | return a->func == b->func; |
e04ab74d | 75 | } |
76 | ||
d62a17ae | 77 | static void *cpu_record_hash_alloc(struct cpu_thread_history *a) |
e04ab74d | 78 | { |
d62a17ae | 79 | struct cpu_thread_history *new; |
80 | new = XCALLOC(MTYPE_THREAD_STATS, sizeof(struct cpu_thread_history)); | |
81 | new->func = a->func; | |
82 | new->funcname = a->funcname; | |
83 | return new; | |
e04ab74d | 84 | } |
85 | ||
d62a17ae | 86 | static void cpu_record_hash_free(void *a) |
228da428 | 87 | { |
d62a17ae | 88 | struct cpu_thread_history *hist = a; |
89 | ||
90 | XFREE(MTYPE_THREAD_STATS, hist); | |
228da428 CC |
91 | } |
92 | ||
d62a17ae | 93 | static void vty_out_cpu_thread_history(struct vty *vty, |
94 | struct cpu_thread_history *a) | |
e04ab74d | 95 | { |
fa0069c6 DS |
96 | vty_out(vty, "%5zu %10zu.%03lu %9zu %8zu %9zu %8lu %9lu", |
97 | a->total_active, a->cpu.total / 1000, a->cpu.total % 1000, | |
98 | a->total_calls, a->cpu.total / a->total_calls, a->cpu.max, | |
d62a17ae | 99 | a->real.total / a->total_calls, a->real.max); |
100 | vty_out(vty, " %c%c%c%c%c %s\n", | |
101 | a->types & (1 << THREAD_READ) ? 'R' : ' ', | |
102 | a->types & (1 << THREAD_WRITE) ? 'W' : ' ', | |
103 | a->types & (1 << THREAD_TIMER) ? 'T' : ' ', | |
104 | a->types & (1 << THREAD_EVENT) ? 'E' : ' ', | |
105 | a->types & (1 << THREAD_EXECUTE) ? 'X' : ' ', a->funcname); | |
e04ab74d | 106 | } |
107 | ||
e3b78da8 | 108 | static void cpu_record_hash_print(struct hash_bucket *bucket, void *args[]) |
e04ab74d | 109 | { |
d62a17ae | 110 | struct cpu_thread_history *totals = args[0]; |
fbcac826 | 111 | struct cpu_thread_history copy; |
d62a17ae | 112 | struct vty *vty = args[1]; |
fbcac826 | 113 | uint8_t *filter = args[2]; |
d62a17ae | 114 | |
115 | struct cpu_thread_history *a = bucket->data; | |
116 | ||
fbcac826 QY |
117 | copy.total_active = |
118 | atomic_load_explicit(&a->total_active, memory_order_seq_cst); | |
119 | copy.total_calls = | |
120 | atomic_load_explicit(&a->total_calls, memory_order_seq_cst); | |
121 | copy.cpu.total = | |
122 | atomic_load_explicit(&a->cpu.total, memory_order_seq_cst); | |
123 | copy.cpu.max = atomic_load_explicit(&a->cpu.max, memory_order_seq_cst); | |
124 | copy.real.total = | |
125 | atomic_load_explicit(&a->real.total, memory_order_seq_cst); | |
126 | copy.real.max = | |
127 | atomic_load_explicit(&a->real.max, memory_order_seq_cst); | |
128 | copy.types = atomic_load_explicit(&a->types, memory_order_seq_cst); | |
129 | copy.funcname = a->funcname; | |
130 | ||
131 | if (!(copy.types & *filter)) | |
d62a17ae | 132 | return; |
fbcac826 QY |
133 | |
134 | vty_out_cpu_thread_history(vty, ©); | |
135 | totals->total_active += copy.total_active; | |
136 | totals->total_calls += copy.total_calls; | |
137 | totals->real.total += copy.real.total; | |
138 | if (totals->real.max < copy.real.max) | |
139 | totals->real.max = copy.real.max; | |
140 | totals->cpu.total += copy.cpu.total; | |
141 | if (totals->cpu.max < copy.cpu.max) | |
142 | totals->cpu.max = copy.cpu.max; | |
e04ab74d | 143 | } |
144 | ||
fbcac826 | 145 | static void cpu_record_print(struct vty *vty, uint8_t filter) |
e04ab74d | 146 | { |
d62a17ae | 147 | struct cpu_thread_history tmp; |
148 | void *args[3] = {&tmp, vty, &filter}; | |
149 | struct thread_master *m; | |
150 | struct listnode *ln; | |
151 | ||
152 | memset(&tmp, 0, sizeof tmp); | |
153 | tmp.funcname = "TOTAL"; | |
154 | tmp.types = filter; | |
155 | ||
156 | pthread_mutex_lock(&masters_mtx); | |
157 | { | |
158 | for (ALL_LIST_ELEMENTS_RO(masters, ln, m)) { | |
159 | const char *name = m->name ? m->name : "main"; | |
160 | ||
161 | char underline[strlen(name) + 1]; | |
162 | memset(underline, '-', sizeof(underline)); | |
4f113d60 | 163 | underline[sizeof(underline) - 1] = '\0'; |
d62a17ae | 164 | |
165 | vty_out(vty, "\n"); | |
166 | vty_out(vty, "Showing statistics for pthread %s\n", | |
167 | name); | |
168 | vty_out(vty, "-------------------------------%s\n", | |
169 | underline); | |
170 | vty_out(vty, "%21s %18s %18s\n", "", | |
171 | "CPU (user+system):", "Real (wall-clock):"); | |
172 | vty_out(vty, | |
173 | "Active Runtime(ms) Invoked Avg uSec Max uSecs"); | |
174 | vty_out(vty, " Avg uSec Max uSecs"); | |
175 | vty_out(vty, " Type Thread\n"); | |
176 | ||
177 | if (m->cpu_record->count) | |
178 | hash_iterate( | |
179 | m->cpu_record, | |
e3b78da8 | 180 | (void (*)(struct hash_bucket *, |
d62a17ae | 181 | void *))cpu_record_hash_print, |
182 | args); | |
183 | else | |
184 | vty_out(vty, "No data to display yet.\n"); | |
185 | ||
186 | vty_out(vty, "\n"); | |
187 | } | |
188 | } | |
189 | pthread_mutex_unlock(&masters_mtx); | |
190 | ||
191 | vty_out(vty, "\n"); | |
192 | vty_out(vty, "Total thread statistics\n"); | |
193 | vty_out(vty, "-------------------------\n"); | |
194 | vty_out(vty, "%21s %18s %18s\n", "", | |
195 | "CPU (user+system):", "Real (wall-clock):"); | |
196 | vty_out(vty, "Active Runtime(ms) Invoked Avg uSec Max uSecs"); | |
197 | vty_out(vty, " Avg uSec Max uSecs"); | |
198 | vty_out(vty, " Type Thread\n"); | |
199 | ||
200 | if (tmp.total_calls > 0) | |
201 | vty_out_cpu_thread_history(vty, &tmp); | |
e04ab74d | 202 | } |
203 | ||
e3b78da8 | 204 | static void cpu_record_hash_clear(struct hash_bucket *bucket, void *args[]) |
e276eb82 | 205 | { |
fbcac826 | 206 | uint8_t *filter = args[0]; |
d62a17ae | 207 | struct hash *cpu_record = args[1]; |
208 | ||
209 | struct cpu_thread_history *a = bucket->data; | |
62f44022 | 210 | |
d62a17ae | 211 | if (!(a->types & *filter)) |
212 | return; | |
f48f65d2 | 213 | |
d62a17ae | 214 | hash_release(cpu_record, bucket->data); |
e276eb82 PJ |
215 | } |
216 | ||
fbcac826 | 217 | static void cpu_record_clear(uint8_t filter) |
e276eb82 | 218 | { |
fbcac826 | 219 | uint8_t *tmp = &filter; |
d62a17ae | 220 | struct thread_master *m; |
221 | struct listnode *ln; | |
222 | ||
223 | pthread_mutex_lock(&masters_mtx); | |
224 | { | |
225 | for (ALL_LIST_ELEMENTS_RO(masters, ln, m)) { | |
226 | pthread_mutex_lock(&m->mtx); | |
227 | { | |
228 | void *args[2] = {tmp, m->cpu_record}; | |
229 | hash_iterate( | |
230 | m->cpu_record, | |
e3b78da8 | 231 | (void (*)(struct hash_bucket *, |
d62a17ae | 232 | void *))cpu_record_hash_clear, |
233 | args); | |
234 | } | |
235 | pthread_mutex_unlock(&m->mtx); | |
236 | } | |
237 | } | |
238 | pthread_mutex_unlock(&masters_mtx); | |
62f44022 QY |
239 | } |
240 | ||
fbcac826 | 241 | static uint8_t parse_filter(const char *filterstr) |
62f44022 | 242 | { |
d62a17ae | 243 | int i = 0; |
244 | int filter = 0; | |
245 | ||
246 | while (filterstr[i] != '\0') { | |
247 | switch (filterstr[i]) { | |
248 | case 'r': | |
249 | case 'R': | |
250 | filter |= (1 << THREAD_READ); | |
251 | break; | |
252 | case 'w': | |
253 | case 'W': | |
254 | filter |= (1 << THREAD_WRITE); | |
255 | break; | |
256 | case 't': | |
257 | case 'T': | |
258 | filter |= (1 << THREAD_TIMER); | |
259 | break; | |
260 | case 'e': | |
261 | case 'E': | |
262 | filter |= (1 << THREAD_EVENT); | |
263 | break; | |
264 | case 'x': | |
265 | case 'X': | |
266 | filter |= (1 << THREAD_EXECUTE); | |
267 | break; | |
268 | default: | |
269 | break; | |
270 | } | |
271 | ++i; | |
272 | } | |
273 | return filter; | |
62f44022 QY |
274 | } |
275 | ||
276 | DEFUN (show_thread_cpu, | |
277 | show_thread_cpu_cmd, | |
278 | "show thread cpu [FILTER]", | |
279 | SHOW_STR | |
280 | "Thread information\n" | |
281 | "Thread CPU usage\n" | |
282 | "Display filter (rwtexb)\n") | |
283 | { | |
fbcac826 | 284 | uint8_t filter = (uint8_t)-1U; |
d62a17ae | 285 | int idx = 0; |
286 | ||
287 | if (argv_find(argv, argc, "FILTER", &idx)) { | |
288 | filter = parse_filter(argv[idx]->arg); | |
289 | if (!filter) { | |
290 | vty_out(vty, | |
291 | "Invalid filter \"%s\" specified; must contain at least" | |
292 | "one of 'RWTEXB'\n", | |
293 | argv[idx]->arg); | |
294 | return CMD_WARNING; | |
295 | } | |
296 | } | |
297 | ||
298 | cpu_record_print(vty, filter); | |
299 | return CMD_SUCCESS; | |
e276eb82 PJ |
300 | } |
301 | ||
8872626b DS |
302 | static void show_thread_poll_helper(struct vty *vty, struct thread_master *m) |
303 | { | |
304 | const char *name = m->name ? m->name : "main"; | |
305 | char underline[strlen(name) + 1]; | |
306 | uint32_t i; | |
307 | ||
308 | memset(underline, '-', sizeof(underline)); | |
309 | underline[sizeof(underline) - 1] = '\0'; | |
310 | ||
311 | vty_out(vty, "\nShowing poll FD's for %s\n", name); | |
312 | vty_out(vty, "----------------------%s\n", underline); | |
313 | vty_out(vty, "Count: %u\n", (uint32_t)m->handler.pfdcount); | |
314 | for (i = 0; i < m->handler.pfdcount; i++) | |
315 | vty_out(vty, "\t%6d fd:%6d events:%2d revents:%2d\n", i, | |
316 | m->handler.pfds[i].fd, | |
317 | m->handler.pfds[i].events, | |
318 | m->handler.pfds[i].revents); | |
319 | } | |
320 | ||
321 | DEFUN (show_thread_poll, | |
322 | show_thread_poll_cmd, | |
323 | "show thread poll", | |
324 | SHOW_STR | |
325 | "Thread information\n" | |
326 | "Show poll FD's and information\n") | |
327 | { | |
328 | struct listnode *node; | |
329 | struct thread_master *m; | |
330 | ||
331 | pthread_mutex_lock(&masters_mtx); | |
332 | { | |
333 | for (ALL_LIST_ELEMENTS_RO(masters, node, m)) { | |
334 | show_thread_poll_helper(vty, m); | |
335 | } | |
336 | } | |
337 | pthread_mutex_unlock(&masters_mtx); | |
338 | ||
339 | return CMD_SUCCESS; | |
340 | } | |
341 | ||
342 | ||
49d41a26 DS |
343 | DEFUN (clear_thread_cpu, |
344 | clear_thread_cpu_cmd, | |
345 | "clear thread cpu [FILTER]", | |
62f44022 | 346 | "Clear stored data in all pthreads\n" |
49d41a26 DS |
347 | "Thread information\n" |
348 | "Thread CPU usage\n" | |
349 | "Display filter (rwtexb)\n") | |
e276eb82 | 350 | { |
fbcac826 | 351 | uint8_t filter = (uint8_t)-1U; |
d62a17ae | 352 | int idx = 0; |
353 | ||
354 | if (argv_find(argv, argc, "FILTER", &idx)) { | |
355 | filter = parse_filter(argv[idx]->arg); | |
356 | if (!filter) { | |
357 | vty_out(vty, | |
358 | "Invalid filter \"%s\" specified; must contain at least" | |
359 | "one of 'RWTEXB'\n", | |
360 | argv[idx]->arg); | |
361 | return CMD_WARNING; | |
362 | } | |
363 | } | |
364 | ||
365 | cpu_record_clear(filter); | |
366 | return CMD_SUCCESS; | |
e276eb82 | 367 | } |
6b0655a2 | 368 | |
d62a17ae | 369 | void thread_cmd_init(void) |
0b84f294 | 370 | { |
d62a17ae | 371 | install_element(VIEW_NODE, &show_thread_cpu_cmd); |
8872626b | 372 | install_element(VIEW_NODE, &show_thread_poll_cmd); |
d62a17ae | 373 | install_element(ENABLE_NODE, &clear_thread_cpu_cmd); |
0b84f294 | 374 | } |
62f44022 QY |
375 | /* CLI end ------------------------------------------------------------------ */ |
376 | ||
0b84f294 | 377 | |
d62a17ae | 378 | static int thread_timer_cmp(void *a, void *b) |
4becea72 | 379 | { |
d62a17ae | 380 | struct thread *thread_a = a; |
381 | struct thread *thread_b = b; | |
382 | ||
383 | if (timercmp(&thread_a->u.sands, &thread_b->u.sands, <)) | |
384 | return -1; | |
385 | if (timercmp(&thread_a->u.sands, &thread_b->u.sands, >)) | |
386 | return 1; | |
387 | return 0; | |
4becea72 CF |
388 | } |
389 | ||
d62a17ae | 390 | static void thread_timer_update(void *node, int actual_position) |
4becea72 | 391 | { |
d62a17ae | 392 | struct thread *thread = node; |
4becea72 | 393 | |
d62a17ae | 394 | thread->index = actual_position; |
4becea72 CF |
395 | } |
396 | ||
d62a17ae | 397 | static void cancelreq_del(void *cr) |
63ccb9cb | 398 | { |
d62a17ae | 399 | XFREE(MTYPE_TMP, cr); |
63ccb9cb QY |
400 | } |
401 | ||
e0bebc7c | 402 | /* initializer, only ever called once */ |
4d762f26 | 403 | static void initializer(void) |
e0bebc7c | 404 | { |
d62a17ae | 405 | pthread_key_create(&thread_current, NULL); |
e0bebc7c QY |
406 | } |
407 | ||
d62a17ae | 408 | struct thread_master *thread_master_create(const char *name) |
718e3744 | 409 | { |
d62a17ae | 410 | struct thread_master *rv; |
411 | struct rlimit limit; | |
412 | ||
413 | pthread_once(&init_once, &initializer); | |
414 | ||
415 | rv = XCALLOC(MTYPE_THREAD_MASTER, sizeof(struct thread_master)); | |
d62a17ae | 416 | |
417 | /* Initialize master mutex */ | |
418 | pthread_mutex_init(&rv->mtx, NULL); | |
419 | pthread_cond_init(&rv->cancel_cond, NULL); | |
420 | ||
421 | /* Set name */ | |
422 | rv->name = name ? XSTRDUP(MTYPE_THREAD_MASTER, name) : NULL; | |
423 | ||
424 | /* Initialize I/O task data structures */ | |
425 | getrlimit(RLIMIT_NOFILE, &limit); | |
426 | rv->fd_limit = (int)limit.rlim_cur; | |
a6f235f3 DS |
427 | rv->read = XCALLOC(MTYPE_THREAD_POLL, |
428 | sizeof(struct thread *) * rv->fd_limit); | |
429 | ||
430 | rv->write = XCALLOC(MTYPE_THREAD_POLL, | |
431 | sizeof(struct thread *) * rv->fd_limit); | |
d62a17ae | 432 | |
bd74dc61 | 433 | rv->cpu_record = hash_create_size( |
996c9314 | 434 | 8, (unsigned int (*)(void *))cpu_record_hash_key, |
74df8d6d | 435 | (bool (*)(const void *, const void *))cpu_record_hash_cmp, |
bd74dc61 | 436 | "Thread Hash"); |
d62a17ae | 437 | |
438 | ||
439 | /* Initialize the timer queues */ | |
440 | rv->timer = pqueue_create(); | |
441 | rv->timer->cmp = thread_timer_cmp; | |
442 | rv->timer->update = thread_timer_update; | |
443 | ||
444 | /* Initialize thread_fetch() settings */ | |
445 | rv->spin = true; | |
446 | rv->handle_signals = true; | |
447 | ||
448 | /* Set pthread owner, should be updated by actual owner */ | |
449 | rv->owner = pthread_self(); | |
450 | rv->cancel_req = list_new(); | |
451 | rv->cancel_req->del = cancelreq_del; | |
452 | rv->canceled = true; | |
453 | ||
454 | /* Initialize pipe poker */ | |
455 | pipe(rv->io_pipe); | |
456 | set_nonblocking(rv->io_pipe[0]); | |
457 | set_nonblocking(rv->io_pipe[1]); | |
458 | ||
459 | /* Initialize data structures for poll() */ | |
460 | rv->handler.pfdsize = rv->fd_limit; | |
461 | rv->handler.pfdcount = 0; | |
462 | rv->handler.pfds = XCALLOC(MTYPE_THREAD_MASTER, | |
463 | sizeof(struct pollfd) * rv->handler.pfdsize); | |
464 | rv->handler.copy = XCALLOC(MTYPE_THREAD_MASTER, | |
465 | sizeof(struct pollfd) * rv->handler.pfdsize); | |
466 | ||
eff09c66 | 467 | /* add to list of threadmasters */ |
d62a17ae | 468 | pthread_mutex_lock(&masters_mtx); |
469 | { | |
eff09c66 QY |
470 | if (!masters) |
471 | masters = list_new(); | |
472 | ||
d62a17ae | 473 | listnode_add(masters, rv); |
474 | } | |
475 | pthread_mutex_unlock(&masters_mtx); | |
476 | ||
477 | return rv; | |
718e3744 | 478 | } |
479 | ||
d8a8a8de QY |
480 | void thread_master_set_name(struct thread_master *master, const char *name) |
481 | { | |
482 | pthread_mutex_lock(&master->mtx); | |
483 | { | |
0a22ddfb | 484 | XFREE(MTYPE_THREAD_MASTER, master->name); |
d8a8a8de QY |
485 | master->name = XSTRDUP(MTYPE_THREAD_MASTER, name); |
486 | } | |
487 | pthread_mutex_unlock(&master->mtx); | |
488 | } | |
489 | ||
718e3744 | 490 | /* Add a new thread to the list. */ |
d62a17ae | 491 | static void thread_list_add(struct thread_list *list, struct thread *thread) |
718e3744 | 492 | { |
d62a17ae | 493 | thread->next = NULL; |
494 | thread->prev = list->tail; | |
495 | if (list->tail) | |
496 | list->tail->next = thread; | |
497 | else | |
498 | list->head = thread; | |
499 | list->tail = thread; | |
500 | list->count++; | |
718e3744 | 501 | } |
502 | ||
718e3744 | 503 | /* Delete a thread from the list. */ |
d62a17ae | 504 | static struct thread *thread_list_delete(struct thread_list *list, |
505 | struct thread *thread) | |
718e3744 | 506 | { |
d62a17ae | 507 | if (thread->next) |
508 | thread->next->prev = thread->prev; | |
509 | else | |
510 | list->tail = thread->prev; | |
511 | if (thread->prev) | |
512 | thread->prev->next = thread->next; | |
513 | else | |
514 | list->head = thread->next; | |
515 | thread->next = thread->prev = NULL; | |
516 | list->count--; | |
517 | return thread; | |
718e3744 | 518 | } |
519 | ||
495f0b13 | 520 | /* Thread list is empty or not. */ |
d62a17ae | 521 | static int thread_empty(struct thread_list *list) |
495f0b13 | 522 | { |
d62a17ae | 523 | return list->head ? 0 : 1; |
495f0b13 DS |
524 | } |
525 | ||
526 | /* Delete top of the list and return it. */ | |
d62a17ae | 527 | static struct thread *thread_trim_head(struct thread_list *list) |
495f0b13 | 528 | { |
d62a17ae | 529 | if (!thread_empty(list)) |
530 | return thread_list_delete(list, list->head); | |
531 | return NULL; | |
495f0b13 DS |
532 | } |
533 | ||
6ed04aa2 DS |
534 | #define THREAD_UNUSED_DEPTH 10 |
535 | ||
718e3744 | 536 | /* Move thread to unuse list. */ |
d62a17ae | 537 | static void thread_add_unuse(struct thread_master *m, struct thread *thread) |
718e3744 | 538 | { |
6655966d RZ |
539 | pthread_mutex_t mtxc = thread->mtx; |
540 | ||
d62a17ae | 541 | assert(m != NULL && thread != NULL); |
542 | assert(thread->next == NULL); | |
543 | assert(thread->prev == NULL); | |
d62a17ae | 544 | |
d62a17ae | 545 | thread->hist->total_active--; |
6ed04aa2 DS |
546 | memset(thread, 0, sizeof(struct thread)); |
547 | thread->type = THREAD_UNUSED; | |
548 | ||
6655966d RZ |
549 | /* Restore the thread mutex context. */ |
550 | thread->mtx = mtxc; | |
551 | ||
552 | if (m->unuse.count < THREAD_UNUSED_DEPTH) { | |
6ed04aa2 | 553 | thread_list_add(&m->unuse, thread); |
6655966d RZ |
554 | return; |
555 | } | |
556 | ||
557 | thread_free(m, thread); | |
718e3744 | 558 | } |
559 | ||
560 | /* Free all unused thread. */ | |
d62a17ae | 561 | static void thread_list_free(struct thread_master *m, struct thread_list *list) |
718e3744 | 562 | { |
d62a17ae | 563 | struct thread *t; |
564 | struct thread *next; | |
565 | ||
566 | for (t = list->head; t; t = next) { | |
567 | next = t->next; | |
6655966d | 568 | thread_free(m, t); |
d62a17ae | 569 | list->count--; |
d62a17ae | 570 | } |
718e3744 | 571 | } |
572 | ||
d62a17ae | 573 | static void thread_array_free(struct thread_master *m, |
574 | struct thread **thread_array) | |
308d14ae | 575 | { |
d62a17ae | 576 | struct thread *t; |
577 | int index; | |
578 | ||
579 | for (index = 0; index < m->fd_limit; ++index) { | |
580 | t = thread_array[index]; | |
581 | if (t) { | |
582 | thread_array[index] = NULL; | |
6655966d | 583 | thread_free(m, t); |
d62a17ae | 584 | } |
585 | } | |
a6f235f3 | 586 | XFREE(MTYPE_THREAD_POLL, thread_array); |
308d14ae DV |
587 | } |
588 | ||
d62a17ae | 589 | static void thread_queue_free(struct thread_master *m, struct pqueue *queue) |
4becea72 | 590 | { |
d62a17ae | 591 | int i; |
4becea72 | 592 | |
d62a17ae | 593 | for (i = 0; i < queue->size; i++) |
6655966d | 594 | thread_free(m, queue->array[i]); |
4becea72 | 595 | |
d62a17ae | 596 | pqueue_delete(queue); |
4becea72 CF |
597 | } |
598 | ||
495f0b13 DS |
599 | /* |
600 | * thread_master_free_unused | |
601 | * | |
602 | * As threads are finished with they are put on the | |
603 | * unuse list for later reuse. | |
604 | * If we are shutting down, Free up unused threads | |
605 | * So we can see if we forget to shut anything off | |
606 | */ | |
d62a17ae | 607 | void thread_master_free_unused(struct thread_master *m) |
495f0b13 | 608 | { |
d62a17ae | 609 | pthread_mutex_lock(&m->mtx); |
610 | { | |
611 | struct thread *t; | |
612 | while ((t = thread_trim_head(&m->unuse)) != NULL) { | |
6655966d | 613 | thread_free(m, t); |
d62a17ae | 614 | } |
615 | } | |
616 | pthread_mutex_unlock(&m->mtx); | |
495f0b13 DS |
617 | } |
618 | ||
718e3744 | 619 | /* Stop thread scheduler. */ |
d62a17ae | 620 | void thread_master_free(struct thread_master *m) |
718e3744 | 621 | { |
d62a17ae | 622 | pthread_mutex_lock(&masters_mtx); |
623 | { | |
624 | listnode_delete(masters, m); | |
eff09c66 | 625 | if (masters->count == 0) { |
6a154c88 | 626 | list_delete(&masters); |
eff09c66 | 627 | } |
d62a17ae | 628 | } |
629 | pthread_mutex_unlock(&masters_mtx); | |
630 | ||
631 | thread_array_free(m, m->read); | |
632 | thread_array_free(m, m->write); | |
633 | thread_queue_free(m, m->timer); | |
634 | thread_list_free(m, &m->event); | |
635 | thread_list_free(m, &m->ready); | |
636 | thread_list_free(m, &m->unuse); | |
637 | pthread_mutex_destroy(&m->mtx); | |
33844bbe | 638 | pthread_cond_destroy(&m->cancel_cond); |
d62a17ae | 639 | close(m->io_pipe[0]); |
640 | close(m->io_pipe[1]); | |
6a154c88 | 641 | list_delete(&m->cancel_req); |
1a0a92ea | 642 | m->cancel_req = NULL; |
d62a17ae | 643 | |
644 | hash_clean(m->cpu_record, cpu_record_hash_free); | |
645 | hash_free(m->cpu_record); | |
646 | m->cpu_record = NULL; | |
647 | ||
0a22ddfb | 648 | XFREE(MTYPE_THREAD_MASTER, m->name); |
d62a17ae | 649 | XFREE(MTYPE_THREAD_MASTER, m->handler.pfds); |
650 | XFREE(MTYPE_THREAD_MASTER, m->handler.copy); | |
651 | XFREE(MTYPE_THREAD_MASTER, m); | |
718e3744 | 652 | } |
653 | ||
78ca0342 CF |
654 | /* Return remain time in miliseconds. */ |
655 | unsigned long thread_timer_remain_msec(struct thread *thread) | |
718e3744 | 656 | { |
d62a17ae | 657 | int64_t remain; |
1189d95f | 658 | |
d62a17ae | 659 | pthread_mutex_lock(&thread->mtx); |
660 | { | |
78ca0342 | 661 | remain = monotime_until(&thread->u.sands, NULL) / 1000LL; |
d62a17ae | 662 | } |
663 | pthread_mutex_unlock(&thread->mtx); | |
1189d95f | 664 | |
d62a17ae | 665 | return remain < 0 ? 0 : remain; |
718e3744 | 666 | } |
667 | ||
78ca0342 CF |
668 | /* Return remain time in seconds. */ |
669 | unsigned long thread_timer_remain_second(struct thread *thread) | |
670 | { | |
671 | return thread_timer_remain_msec(thread) / 1000LL; | |
672 | } | |
673 | ||
9c7753e4 DL |
674 | #define debugargdef const char *funcname, const char *schedfrom, int fromln |
675 | #define debugargpass funcname, schedfrom, fromln | |
e04ab74d | 676 | |
d62a17ae | 677 | struct timeval thread_timer_remain(struct thread *thread) |
6ac44687 | 678 | { |
d62a17ae | 679 | struct timeval remain; |
680 | pthread_mutex_lock(&thread->mtx); | |
681 | { | |
682 | monotime_until(&thread->u.sands, &remain); | |
683 | } | |
684 | pthread_mutex_unlock(&thread->mtx); | |
685 | return remain; | |
6ac44687 CF |
686 | } |
687 | ||
718e3744 | 688 | /* Get new thread. */ |
d7c0a89a | 689 | static struct thread *thread_get(struct thread_master *m, uint8_t type, |
d62a17ae | 690 | int (*func)(struct thread *), void *arg, |
691 | debugargdef) | |
718e3744 | 692 | { |
d62a17ae | 693 | struct thread *thread = thread_trim_head(&m->unuse); |
694 | struct cpu_thread_history tmp; | |
695 | ||
696 | if (!thread) { | |
697 | thread = XCALLOC(MTYPE_THREAD, sizeof(struct thread)); | |
698 | /* mutex only needs to be initialized at struct creation. */ | |
699 | pthread_mutex_init(&thread->mtx, NULL); | |
700 | m->alloc++; | |
701 | } | |
702 | ||
703 | thread->type = type; | |
704 | thread->add_type = type; | |
705 | thread->master = m; | |
706 | thread->arg = arg; | |
707 | thread->index = -1; | |
708 | thread->yield = THREAD_YIELD_TIME_SLOT; /* default */ | |
709 | thread->ref = NULL; | |
710 | ||
711 | /* | |
712 | * So if the passed in funcname is not what we have | |
713 | * stored that means the thread->hist needs to be | |
714 | * updated. We keep the last one around in unused | |
715 | * under the assumption that we are probably | |
716 | * going to immediately allocate the same | |
717 | * type of thread. | |
718 | * This hopefully saves us some serious | |
719 | * hash_get lookups. | |
720 | */ | |
721 | if (thread->funcname != funcname || thread->func != func) { | |
722 | tmp.func = func; | |
723 | tmp.funcname = funcname; | |
724 | thread->hist = | |
725 | hash_get(m->cpu_record, &tmp, | |
726 | (void *(*)(void *))cpu_record_hash_alloc); | |
727 | } | |
728 | thread->hist->total_active++; | |
729 | thread->func = func; | |
730 | thread->funcname = funcname; | |
731 | thread->schedfrom = schedfrom; | |
732 | thread->schedfrom_line = fromln; | |
733 | ||
734 | return thread; | |
718e3744 | 735 | } |
736 | ||
6655966d RZ |
737 | static void thread_free(struct thread_master *master, struct thread *thread) |
738 | { | |
739 | /* Update statistics. */ | |
740 | assert(master->alloc > 0); | |
741 | master->alloc--; | |
742 | ||
743 | /* Free allocated resources. */ | |
744 | pthread_mutex_destroy(&thread->mtx); | |
745 | XFREE(MTYPE_THREAD, thread); | |
746 | } | |
747 | ||
d62a17ae | 748 | static int fd_poll(struct thread_master *m, struct pollfd *pfds, nfds_t pfdsize, |
749 | nfds_t count, const struct timeval *timer_wait) | |
209a72a6 | 750 | { |
d62a17ae | 751 | /* If timer_wait is null here, that means poll() should block |
752 | * indefinitely, | |
753 | * unless the thread_master has overriden it by setting | |
754 | * ->selectpoll_timeout. | |
755 | * If the value is positive, it specifies the maximum number of | |
756 | * milliseconds | |
757 | * to wait. If the timeout is -1, it specifies that we should never wait | |
758 | * and | |
759 | * always return immediately even if no event is detected. If the value | |
760 | * is | |
761 | * zero, the behavior is default. */ | |
762 | int timeout = -1; | |
763 | ||
764 | /* number of file descriptors with events */ | |
765 | int num; | |
766 | ||
767 | if (timer_wait != NULL | |
768 | && m->selectpoll_timeout == 0) // use the default value | |
769 | timeout = (timer_wait->tv_sec * 1000) | |
770 | + (timer_wait->tv_usec / 1000); | |
771 | else if (m->selectpoll_timeout > 0) // use the user's timeout | |
772 | timeout = m->selectpoll_timeout; | |
773 | else if (m->selectpoll_timeout | |
774 | < 0) // effect a poll (return immediately) | |
775 | timeout = 0; | |
776 | ||
777 | /* add poll pipe poker */ | |
778 | assert(count + 1 < pfdsize); | |
779 | pfds[count].fd = m->io_pipe[0]; | |
780 | pfds[count].events = POLLIN; | |
781 | pfds[count].revents = 0x00; | |
782 | ||
783 | num = poll(pfds, count + 1, timeout); | |
784 | ||
785 | unsigned char trash[64]; | |
786 | if (num > 0 && pfds[count].revents != 0 && num--) | |
787 | while (read(m->io_pipe[0], &trash, sizeof(trash)) > 0) | |
788 | ; | |
789 | ||
790 | return num; | |
209a72a6 DS |
791 | } |
792 | ||
718e3744 | 793 | /* Add new read thread. */ |
d62a17ae | 794 | struct thread *funcname_thread_add_read_write(int dir, struct thread_master *m, |
795 | int (*func)(struct thread *), | |
796 | void *arg, int fd, | |
797 | struct thread **t_ptr, | |
798 | debugargdef) | |
718e3744 | 799 | { |
d62a17ae | 800 | struct thread *thread = NULL; |
801 | ||
9b864cd3 | 802 | assert(fd >= 0 && fd < m->fd_limit); |
d62a17ae | 803 | pthread_mutex_lock(&m->mtx); |
804 | { | |
805 | if (t_ptr | |
806 | && *t_ptr) // thread is already scheduled; don't reschedule | |
807 | { | |
808 | pthread_mutex_unlock(&m->mtx); | |
809 | return NULL; | |
810 | } | |
811 | ||
812 | /* default to a new pollfd */ | |
813 | nfds_t queuepos = m->handler.pfdcount; | |
814 | ||
815 | /* if we already have a pollfd for our file descriptor, find and | |
816 | * use it */ | |
817 | for (nfds_t i = 0; i < m->handler.pfdcount; i++) | |
818 | if (m->handler.pfds[i].fd == fd) { | |
819 | queuepos = i; | |
820 | break; | |
821 | } | |
822 | ||
823 | /* make sure we have room for this fd + pipe poker fd */ | |
824 | assert(queuepos + 1 < m->handler.pfdsize); | |
825 | ||
826 | thread = thread_get(m, dir, func, arg, debugargpass); | |
827 | ||
828 | m->handler.pfds[queuepos].fd = fd; | |
829 | m->handler.pfds[queuepos].events |= | |
830 | (dir == THREAD_READ ? POLLIN : POLLOUT); | |
831 | ||
832 | if (queuepos == m->handler.pfdcount) | |
833 | m->handler.pfdcount++; | |
834 | ||
835 | if (thread) { | |
836 | pthread_mutex_lock(&thread->mtx); | |
837 | { | |
838 | thread->u.fd = fd; | |
839 | if (dir == THREAD_READ) | |
840 | m->read[thread->u.fd] = thread; | |
841 | else | |
842 | m->write[thread->u.fd] = thread; | |
843 | } | |
844 | pthread_mutex_unlock(&thread->mtx); | |
845 | ||
846 | if (t_ptr) { | |
847 | *t_ptr = thread; | |
848 | thread->ref = t_ptr; | |
849 | } | |
850 | } | |
851 | ||
852 | AWAKEN(m); | |
853 | } | |
854 | pthread_mutex_unlock(&m->mtx); | |
855 | ||
856 | return thread; | |
718e3744 | 857 | } |
858 | ||
56a94b36 | 859 | static struct thread * |
d62a17ae | 860 | funcname_thread_add_timer_timeval(struct thread_master *m, |
861 | int (*func)(struct thread *), int type, | |
862 | void *arg, struct timeval *time_relative, | |
863 | struct thread **t_ptr, debugargdef) | |
718e3744 | 864 | { |
d62a17ae | 865 | struct thread *thread; |
866 | struct pqueue *queue; | |
867 | ||
868 | assert(m != NULL); | |
869 | ||
870 | assert(type == THREAD_TIMER); | |
871 | assert(time_relative); | |
872 | ||
873 | pthread_mutex_lock(&m->mtx); | |
874 | { | |
875 | if (t_ptr | |
876 | && *t_ptr) // thread is already scheduled; don't reschedule | |
877 | { | |
878 | pthread_mutex_unlock(&m->mtx); | |
879 | return NULL; | |
880 | } | |
881 | ||
882 | queue = m->timer; | |
883 | thread = thread_get(m, type, func, arg, debugargpass); | |
884 | ||
885 | pthread_mutex_lock(&thread->mtx); | |
886 | { | |
887 | monotime(&thread->u.sands); | |
888 | timeradd(&thread->u.sands, time_relative, | |
889 | &thread->u.sands); | |
890 | pqueue_enqueue(thread, queue); | |
891 | if (t_ptr) { | |
892 | *t_ptr = thread; | |
893 | thread->ref = t_ptr; | |
894 | } | |
895 | } | |
896 | pthread_mutex_unlock(&thread->mtx); | |
897 | ||
898 | AWAKEN(m); | |
899 | } | |
900 | pthread_mutex_unlock(&m->mtx); | |
901 | ||
902 | return thread; | |
9e867fe6 | 903 | } |
904 | ||
98c91ac6 | 905 | |
906 | /* Add timer event thread. */ | |
d62a17ae | 907 | struct thread *funcname_thread_add_timer(struct thread_master *m, |
908 | int (*func)(struct thread *), | |
909 | void *arg, long timer, | |
910 | struct thread **t_ptr, debugargdef) | |
9e867fe6 | 911 | { |
d62a17ae | 912 | struct timeval trel; |
9e867fe6 | 913 | |
d62a17ae | 914 | assert(m != NULL); |
9e867fe6 | 915 | |
d62a17ae | 916 | trel.tv_sec = timer; |
917 | trel.tv_usec = 0; | |
9e867fe6 | 918 | |
d62a17ae | 919 | return funcname_thread_add_timer_timeval(m, func, THREAD_TIMER, arg, |
920 | &trel, t_ptr, debugargpass); | |
98c91ac6 | 921 | } |
9e867fe6 | 922 | |
98c91ac6 | 923 | /* Add timer event thread with "millisecond" resolution */ |
d62a17ae | 924 | struct thread *funcname_thread_add_timer_msec(struct thread_master *m, |
925 | int (*func)(struct thread *), | |
926 | void *arg, long timer, | |
927 | struct thread **t_ptr, | |
928 | debugargdef) | |
98c91ac6 | 929 | { |
d62a17ae | 930 | struct timeval trel; |
9e867fe6 | 931 | |
d62a17ae | 932 | assert(m != NULL); |
718e3744 | 933 | |
d62a17ae | 934 | trel.tv_sec = timer / 1000; |
935 | trel.tv_usec = 1000 * (timer % 1000); | |
98c91ac6 | 936 | |
d62a17ae | 937 | return funcname_thread_add_timer_timeval(m, func, THREAD_TIMER, arg, |
938 | &trel, t_ptr, debugargpass); | |
a48b4e6d | 939 | } |
940 | ||
d03c4cbd | 941 | /* Add timer event thread with "millisecond" resolution */ |
d62a17ae | 942 | struct thread *funcname_thread_add_timer_tv(struct thread_master *m, |
943 | int (*func)(struct thread *), | |
944 | void *arg, struct timeval *tv, | |
945 | struct thread **t_ptr, debugargdef) | |
d03c4cbd | 946 | { |
d62a17ae | 947 | return funcname_thread_add_timer_timeval(m, func, THREAD_TIMER, arg, tv, |
948 | t_ptr, debugargpass); | |
d03c4cbd DL |
949 | } |
950 | ||
718e3744 | 951 | /* Add simple event thread. */ |
d62a17ae | 952 | struct thread *funcname_thread_add_event(struct thread_master *m, |
953 | int (*func)(struct thread *), | |
954 | void *arg, int val, | |
955 | struct thread **t_ptr, debugargdef) | |
718e3744 | 956 | { |
d62a17ae | 957 | struct thread *thread; |
958 | ||
959 | assert(m != NULL); | |
960 | ||
961 | pthread_mutex_lock(&m->mtx); | |
962 | { | |
963 | if (t_ptr | |
964 | && *t_ptr) // thread is already scheduled; don't reschedule | |
965 | { | |
966 | pthread_mutex_unlock(&m->mtx); | |
967 | return NULL; | |
968 | } | |
969 | ||
970 | thread = thread_get(m, THREAD_EVENT, func, arg, debugargpass); | |
971 | pthread_mutex_lock(&thread->mtx); | |
972 | { | |
973 | thread->u.val = val; | |
974 | thread_list_add(&m->event, thread); | |
975 | } | |
976 | pthread_mutex_unlock(&thread->mtx); | |
977 | ||
978 | if (t_ptr) { | |
979 | *t_ptr = thread; | |
980 | thread->ref = t_ptr; | |
981 | } | |
982 | ||
983 | AWAKEN(m); | |
984 | } | |
985 | pthread_mutex_unlock(&m->mtx); | |
986 | ||
987 | return thread; | |
718e3744 | 988 | } |
989 | ||
63ccb9cb QY |
990 | /* Thread cancellation ------------------------------------------------------ */ |
991 | ||
8797240e QY |
992 | /** |
993 | * NOT's out the .events field of pollfd corresponding to the given file | |
994 | * descriptor. The event to be NOT'd is passed in the 'state' parameter. | |
995 | * | |
996 | * This needs to happen for both copies of pollfd's. See 'thread_fetch' | |
997 | * implementation for details. | |
998 | * | |
999 | * @param master | |
1000 | * @param fd | |
1001 | * @param state the event to cancel. One or more (OR'd together) of the | |
1002 | * following: | |
1003 | * - POLLIN | |
1004 | * - POLLOUT | |
1005 | */ | |
d62a17ae | 1006 | static void thread_cancel_rw(struct thread_master *master, int fd, short state) |
0a95a0d0 | 1007 | { |
42d74538 QY |
1008 | bool found = false; |
1009 | ||
d62a17ae | 1010 | /* Cancel POLLHUP too just in case some bozo set it */ |
1011 | state |= POLLHUP; | |
1012 | ||
1013 | /* find the index of corresponding pollfd */ | |
1014 | nfds_t i; | |
1015 | ||
1016 | for (i = 0; i < master->handler.pfdcount; i++) | |
42d74538 QY |
1017 | if (master->handler.pfds[i].fd == fd) { |
1018 | found = true; | |
d62a17ae | 1019 | break; |
42d74538 QY |
1020 | } |
1021 | ||
1022 | if (!found) { | |
1023 | zlog_debug( | |
1024 | "[!] Received cancellation request for nonexistent rw job"); | |
1025 | zlog_debug("[!] threadmaster: %s | fd: %d", | |
996c9314 | 1026 | master->name ? master->name : "", fd); |
42d74538 QY |
1027 | return; |
1028 | } | |
d62a17ae | 1029 | |
1030 | /* NOT out event. */ | |
1031 | master->handler.pfds[i].events &= ~(state); | |
1032 | ||
1033 | /* If all events are canceled, delete / resize the pollfd array. */ | |
1034 | if (master->handler.pfds[i].events == 0) { | |
1035 | memmove(master->handler.pfds + i, master->handler.pfds + i + 1, | |
1036 | (master->handler.pfdcount - i - 1) | |
1037 | * sizeof(struct pollfd)); | |
1038 | master->handler.pfdcount--; | |
1039 | } | |
1040 | ||
1041 | /* If we have the same pollfd in the copy, perform the same operations, | |
1042 | * otherwise return. */ | |
1043 | if (i >= master->handler.copycount) | |
1044 | return; | |
1045 | ||
1046 | master->handler.copy[i].events &= ~(state); | |
1047 | ||
1048 | if (master->handler.copy[i].events == 0) { | |
1049 | memmove(master->handler.copy + i, master->handler.copy + i + 1, | |
1050 | (master->handler.copycount - i - 1) | |
1051 | * sizeof(struct pollfd)); | |
1052 | master->handler.copycount--; | |
1053 | } | |
0a95a0d0 DS |
1054 | } |
1055 | ||
1189d95f | 1056 | /** |
63ccb9cb | 1057 | * Process cancellation requests. |
1189d95f | 1058 | * |
63ccb9cb QY |
1059 | * This may only be run from the pthread which owns the thread_master. |
1060 | * | |
1061 | * @param master the thread master to process | |
1062 | * @REQUIRE master->mtx | |
1189d95f | 1063 | */ |
d62a17ae | 1064 | static void do_thread_cancel(struct thread_master *master) |
718e3744 | 1065 | { |
d62a17ae | 1066 | struct thread_list *list = NULL; |
1067 | struct pqueue *queue = NULL; | |
1068 | struct thread **thread_array = NULL; | |
1069 | struct thread *thread; | |
1070 | ||
1071 | struct cancel_req *cr; | |
1072 | struct listnode *ln; | |
1073 | for (ALL_LIST_ELEMENTS_RO(master->cancel_req, ln, cr)) { | |
1074 | /* If this is an event object cancellation, linear search | |
1075 | * through event | |
1076 | * list deleting any events which have the specified argument. | |
1077 | * We also | |
1078 | * need to check every thread in the ready queue. */ | |
1079 | if (cr->eventobj) { | |
1080 | struct thread *t; | |
1081 | thread = master->event.head; | |
1082 | ||
1083 | while (thread) { | |
1084 | t = thread; | |
1085 | thread = t->next; | |
1086 | ||
1087 | if (t->arg == cr->eventobj) { | |
1088 | thread_list_delete(&master->event, t); | |
1089 | if (t->ref) | |
1090 | *t->ref = NULL; | |
1091 | thread_add_unuse(master, t); | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | thread = master->ready.head; | |
1096 | while (thread) { | |
1097 | t = thread; | |
1098 | thread = t->next; | |
1099 | ||
1100 | if (t->arg == cr->eventobj) { | |
1101 | thread_list_delete(&master->ready, t); | |
1102 | if (t->ref) | |
1103 | *t->ref = NULL; | |
1104 | thread_add_unuse(master, t); | |
1105 | } | |
1106 | } | |
1107 | continue; | |
1108 | } | |
1109 | ||
1110 | /* The pointer varies depending on whether the cancellation | |
1111 | * request was | |
1112 | * made asynchronously or not. If it was, we need to check | |
1113 | * whether the | |
1114 | * thread even exists anymore before cancelling it. */ | |
1115 | thread = (cr->thread) ? cr->thread : *cr->threadref; | |
1116 | ||
1117 | if (!thread) | |
1118 | continue; | |
1119 | ||
1120 | /* Determine the appropriate queue to cancel the thread from */ | |
1121 | switch (thread->type) { | |
1122 | case THREAD_READ: | |
1123 | thread_cancel_rw(master, thread->u.fd, POLLIN); | |
1124 | thread_array = master->read; | |
1125 | break; | |
1126 | case THREAD_WRITE: | |
1127 | thread_cancel_rw(master, thread->u.fd, POLLOUT); | |
1128 | thread_array = master->write; | |
1129 | break; | |
1130 | case THREAD_TIMER: | |
1131 | queue = master->timer; | |
1132 | break; | |
1133 | case THREAD_EVENT: | |
1134 | list = &master->event; | |
1135 | break; | |
1136 | case THREAD_READY: | |
1137 | list = &master->ready; | |
1138 | break; | |
1139 | default: | |
1140 | continue; | |
1141 | break; | |
1142 | } | |
1143 | ||
1144 | if (queue) { | |
1145 | assert(thread->index >= 0); | |
522f7f99 DS |
1146 | assert(thread == queue->array[thread->index]); |
1147 | pqueue_remove_at(thread->index, queue); | |
d62a17ae | 1148 | } else if (list) { |
1149 | thread_list_delete(list, thread); | |
1150 | } else if (thread_array) { | |
1151 | thread_array[thread->u.fd] = NULL; | |
1152 | } else { | |
1153 | assert(!"Thread should be either in queue or list or array!"); | |
1154 | } | |
1155 | ||
1156 | if (thread->ref) | |
1157 | *thread->ref = NULL; | |
1158 | ||
1159 | thread_add_unuse(thread->master, thread); | |
1160 | } | |
1161 | ||
1162 | /* Delete and free all cancellation requests */ | |
1163 | list_delete_all_node(master->cancel_req); | |
1164 | ||
1165 | /* Wake up any threads which may be blocked in thread_cancel_async() */ | |
1166 | master->canceled = true; | |
1167 | pthread_cond_broadcast(&master->cancel_cond); | |
718e3744 | 1168 | } |
1169 | ||
63ccb9cb QY |
1170 | /** |
1171 | * Cancel any events which have the specified argument. | |
1172 | * | |
1173 | * MT-Unsafe | |
1174 | * | |
1175 | * @param m the thread_master to cancel from | |
1176 | * @param arg the argument passed when creating the event | |
1177 | */ | |
d62a17ae | 1178 | void thread_cancel_event(struct thread_master *master, void *arg) |
718e3744 | 1179 | { |
d62a17ae | 1180 | assert(master->owner == pthread_self()); |
1181 | ||
1182 | pthread_mutex_lock(&master->mtx); | |
1183 | { | |
1184 | struct cancel_req *cr = | |
1185 | XCALLOC(MTYPE_TMP, sizeof(struct cancel_req)); | |
1186 | cr->eventobj = arg; | |
1187 | listnode_add(master->cancel_req, cr); | |
1188 | do_thread_cancel(master); | |
1189 | } | |
1190 | pthread_mutex_unlock(&master->mtx); | |
63ccb9cb | 1191 | } |
1189d95f | 1192 | |
63ccb9cb QY |
1193 | /** |
1194 | * Cancel a specific task. | |
1195 | * | |
1196 | * MT-Unsafe | |
1197 | * | |
1198 | * @param thread task to cancel | |
1199 | */ | |
d62a17ae | 1200 | void thread_cancel(struct thread *thread) |
63ccb9cb | 1201 | { |
6ed04aa2 | 1202 | struct thread_master *master = thread->master; |
d62a17ae | 1203 | |
6ed04aa2 DS |
1204 | assert(master->owner == pthread_self()); |
1205 | ||
1206 | pthread_mutex_lock(&master->mtx); | |
d62a17ae | 1207 | { |
1208 | struct cancel_req *cr = | |
1209 | XCALLOC(MTYPE_TMP, sizeof(struct cancel_req)); | |
1210 | cr->thread = thread; | |
6ed04aa2 DS |
1211 | listnode_add(master->cancel_req, cr); |
1212 | do_thread_cancel(master); | |
d62a17ae | 1213 | } |
6ed04aa2 | 1214 | pthread_mutex_unlock(&master->mtx); |
63ccb9cb | 1215 | } |
1189d95f | 1216 | |
63ccb9cb QY |
1217 | /** |
1218 | * Asynchronous cancellation. | |
1219 | * | |
8797240e QY |
1220 | * Called with either a struct thread ** or void * to an event argument, |
1221 | * this function posts the correct cancellation request and blocks until it is | |
1222 | * serviced. | |
63ccb9cb QY |
1223 | * |
1224 | * If the thread is currently running, execution blocks until it completes. | |
1225 | * | |
8797240e QY |
1226 | * The last two parameters are mutually exclusive, i.e. if you pass one the |
1227 | * other must be NULL. | |
1228 | * | |
1229 | * When the cancellation procedure executes on the target thread_master, the | |
1230 | * thread * provided is checked for nullity. If it is null, the thread is | |
1231 | * assumed to no longer exist and the cancellation request is a no-op. Thus | |
1232 | * users of this API must pass a back-reference when scheduling the original | |
1233 | * task. | |
1234 | * | |
63ccb9cb QY |
1235 | * MT-Safe |
1236 | * | |
8797240e QY |
1237 | * @param master the thread master with the relevant event / task |
1238 | * @param thread pointer to thread to cancel | |
1239 | * @param eventobj the event | |
63ccb9cb | 1240 | */ |
d62a17ae | 1241 | void thread_cancel_async(struct thread_master *master, struct thread **thread, |
1242 | void *eventobj) | |
63ccb9cb | 1243 | { |
d62a17ae | 1244 | assert(!(thread && eventobj) && (thread || eventobj)); |
1245 | assert(master->owner != pthread_self()); | |
1246 | ||
1247 | pthread_mutex_lock(&master->mtx); | |
1248 | { | |
1249 | master->canceled = false; | |
1250 | ||
1251 | if (thread) { | |
1252 | struct cancel_req *cr = | |
1253 | XCALLOC(MTYPE_TMP, sizeof(struct cancel_req)); | |
1254 | cr->threadref = thread; | |
1255 | listnode_add(master->cancel_req, cr); | |
1256 | } else if (eventobj) { | |
1257 | struct cancel_req *cr = | |
1258 | XCALLOC(MTYPE_TMP, sizeof(struct cancel_req)); | |
1259 | cr->eventobj = eventobj; | |
1260 | listnode_add(master->cancel_req, cr); | |
1261 | } | |
1262 | AWAKEN(master); | |
1263 | ||
1264 | while (!master->canceled) | |
1265 | pthread_cond_wait(&master->cancel_cond, &master->mtx); | |
1266 | } | |
1267 | pthread_mutex_unlock(&master->mtx); | |
718e3744 | 1268 | } |
63ccb9cb | 1269 | /* ------------------------------------------------------------------------- */ |
718e3744 | 1270 | |
d62a17ae | 1271 | static struct timeval *thread_timer_wait(struct pqueue *queue, |
1272 | struct timeval *timer_val) | |
718e3744 | 1273 | { |
d62a17ae | 1274 | if (queue->size) { |
1275 | struct thread *next_timer = queue->array[0]; | |
1276 | monotime_until(&next_timer->u.sands, timer_val); | |
1277 | return timer_val; | |
1278 | } | |
1279 | return NULL; | |
718e3744 | 1280 | } |
718e3744 | 1281 | |
d62a17ae | 1282 | static struct thread *thread_run(struct thread_master *m, struct thread *thread, |
1283 | struct thread *fetch) | |
718e3744 | 1284 | { |
d62a17ae | 1285 | *fetch = *thread; |
1286 | thread_add_unuse(m, thread); | |
1287 | return fetch; | |
718e3744 | 1288 | } |
1289 | ||
d62a17ae | 1290 | static int thread_process_io_helper(struct thread_master *m, |
1291 | struct thread *thread, short state, int pos) | |
5d4ccd4e | 1292 | { |
d62a17ae | 1293 | struct thread **thread_array; |
1294 | ||
1295 | if (!thread) | |
1296 | return 0; | |
1297 | ||
1298 | if (thread->type == THREAD_READ) | |
1299 | thread_array = m->read; | |
1300 | else | |
1301 | thread_array = m->write; | |
1302 | ||
1303 | thread_array[thread->u.fd] = NULL; | |
1304 | thread_list_add(&m->ready, thread); | |
1305 | thread->type = THREAD_READY; | |
1306 | /* if another pthread scheduled this file descriptor for the event we're | |
1307 | * responding to, no problem; we're getting to it now */ | |
1308 | thread->master->handler.pfds[pos].events &= ~(state); | |
1309 | return 1; | |
5d4ccd4e DS |
1310 | } |
1311 | ||
8797240e QY |
1312 | /** |
1313 | * Process I/O events. | |
1314 | * | |
1315 | * Walks through file descriptor array looking for those pollfds whose .revents | |
1316 | * field has something interesting. Deletes any invalid file descriptors. | |
1317 | * | |
1318 | * @param m the thread master | |
1319 | * @param num the number of active file descriptors (return value of poll()) | |
1320 | */ | |
d62a17ae | 1321 | static void thread_process_io(struct thread_master *m, unsigned int num) |
0a95a0d0 | 1322 | { |
d62a17ae | 1323 | unsigned int ready = 0; |
1324 | struct pollfd *pfds = m->handler.copy; | |
1325 | ||
1326 | for (nfds_t i = 0; i < m->handler.copycount && ready < num; ++i) { | |
1327 | /* no event for current fd? immediately continue */ | |
1328 | if (pfds[i].revents == 0) | |
1329 | continue; | |
1330 | ||
1331 | ready++; | |
1332 | ||
1333 | /* Unless someone has called thread_cancel from another pthread, | |
1334 | * the only | |
1335 | * thing that could have changed in m->handler.pfds while we | |
1336 | * were | |
1337 | * asleep is the .events field in a given pollfd. Barring | |
1338 | * thread_cancel() | |
1339 | * that value should be a superset of the values we have in our | |
1340 | * copy, so | |
1341 | * there's no need to update it. Similarily, barring deletion, | |
1342 | * the fd | |
1343 | * should still be a valid index into the master's pfds. */ | |
1344 | if (pfds[i].revents & (POLLIN | POLLHUP)) | |
1345 | thread_process_io_helper(m, m->read[pfds[i].fd], POLLIN, | |
1346 | i); | |
1347 | if (pfds[i].revents & POLLOUT) | |
1348 | thread_process_io_helper(m, m->write[pfds[i].fd], | |
1349 | POLLOUT, i); | |
1350 | ||
1351 | /* if one of our file descriptors is garbage, remove the same | |
1352 | * from | |
1353 | * both pfds + update sizes and index */ | |
1354 | if (pfds[i].revents & POLLNVAL) { | |
1355 | memmove(m->handler.pfds + i, m->handler.pfds + i + 1, | |
1356 | (m->handler.pfdcount - i - 1) | |
1357 | * sizeof(struct pollfd)); | |
1358 | m->handler.pfdcount--; | |
1359 | ||
1360 | memmove(pfds + i, pfds + i + 1, | |
1361 | (m->handler.copycount - i - 1) | |
1362 | * sizeof(struct pollfd)); | |
1363 | m->handler.copycount--; | |
1364 | ||
1365 | i--; | |
1366 | } | |
1367 | } | |
718e3744 | 1368 | } |
1369 | ||
8b70d0b0 | 1370 | /* Add all timers that have popped to the ready list. */ |
d62a17ae | 1371 | static unsigned int thread_process_timers(struct pqueue *queue, |
1372 | struct timeval *timenow) | |
a48b4e6d | 1373 | { |
d62a17ae | 1374 | struct thread *thread; |
1375 | unsigned int ready = 0; | |
1376 | ||
1377 | while (queue->size) { | |
1378 | thread = queue->array[0]; | |
1379 | if (timercmp(timenow, &thread->u.sands, <)) | |
1380 | return ready; | |
1381 | pqueue_dequeue(queue); | |
1382 | thread->type = THREAD_READY; | |
1383 | thread_list_add(&thread->master->ready, thread); | |
1384 | ready++; | |
1385 | } | |
1386 | return ready; | |
a48b4e6d | 1387 | } |
1388 | ||
2613abe6 | 1389 | /* process a list en masse, e.g. for event thread lists */ |
d62a17ae | 1390 | static unsigned int thread_process(struct thread_list *list) |
2613abe6 | 1391 | { |
d62a17ae | 1392 | struct thread *thread; |
1393 | struct thread *next; | |
1394 | unsigned int ready = 0; | |
1395 | ||
1396 | for (thread = list->head; thread; thread = next) { | |
1397 | next = thread->next; | |
1398 | thread_list_delete(list, thread); | |
1399 | thread->type = THREAD_READY; | |
1400 | thread_list_add(&thread->master->ready, thread); | |
1401 | ready++; | |
1402 | } | |
1403 | return ready; | |
2613abe6 PJ |
1404 | } |
1405 | ||
1406 | ||
718e3744 | 1407 | /* Fetch next ready thread. */ |
d62a17ae | 1408 | struct thread *thread_fetch(struct thread_master *m, struct thread *fetch) |
718e3744 | 1409 | { |
d62a17ae | 1410 | struct thread *thread = NULL; |
1411 | struct timeval now; | |
1412 | struct timeval zerotime = {0, 0}; | |
1413 | struct timeval tv; | |
1414 | struct timeval *tw = NULL; | |
1415 | ||
1416 | int num = 0; | |
1417 | ||
1418 | do { | |
1419 | /* Handle signals if any */ | |
1420 | if (m->handle_signals) | |
1421 | quagga_sigevent_process(); | |
1422 | ||
1423 | pthread_mutex_lock(&m->mtx); | |
1424 | ||
1425 | /* Process any pending cancellation requests */ | |
1426 | do_thread_cancel(m); | |
1427 | ||
e3c9529e QY |
1428 | /* |
1429 | * Attempt to flush ready queue before going into poll(). | |
1430 | * This is performance-critical. Think twice before modifying. | |
1431 | */ | |
1432 | if ((thread = thread_trim_head(&m->ready))) { | |
1433 | fetch = thread_run(m, thread, fetch); | |
1434 | if (fetch->ref) | |
1435 | *fetch->ref = NULL; | |
1436 | pthread_mutex_unlock(&m->mtx); | |
1437 | break; | |
1438 | } | |
1439 | ||
1440 | /* otherwise, tick through scheduling sequence */ | |
1441 | ||
bca37d17 QY |
1442 | /* |
1443 | * Post events to ready queue. This must come before the | |
1444 | * following block since events should occur immediately | |
1445 | */ | |
d62a17ae | 1446 | thread_process(&m->event); |
1447 | ||
bca37d17 QY |
1448 | /* |
1449 | * If there are no tasks on the ready queue, we will poll() | |
1450 | * until a timer expires or we receive I/O, whichever comes | |
1451 | * first. The strategy for doing this is: | |
d62a17ae | 1452 | * |
1453 | * - If there are events pending, set the poll() timeout to zero | |
1454 | * - If there are no events pending, but there are timers | |
1455 | * pending, set the | |
1456 | * timeout to the smallest remaining time on any timer | |
1457 | * - If there are neither timers nor events pending, but there | |
1458 | * are file | |
1459 | * descriptors pending, block indefinitely in poll() | |
1460 | * - If nothing is pending, it's time for the application to die | |
1461 | * | |
1462 | * In every case except the last, we need to hit poll() at least | |
bca37d17 QY |
1463 | * once per loop to avoid starvation by events |
1464 | */ | |
d62a17ae | 1465 | if (m->ready.count == 0) |
1466 | tw = thread_timer_wait(m->timer, &tv); | |
1467 | ||
1468 | if (m->ready.count != 0 || (tw && !timercmp(tw, &zerotime, >))) | |
1469 | tw = &zerotime; | |
1470 | ||
1471 | if (!tw && m->handler.pfdcount == 0) { /* die */ | |
1472 | pthread_mutex_unlock(&m->mtx); | |
1473 | fetch = NULL; | |
1474 | break; | |
1475 | } | |
1476 | ||
bca37d17 QY |
1477 | /* |
1478 | * Copy pollfd array + # active pollfds in it. Not necessary to | |
1479 | * copy the array size as this is fixed. | |
1480 | */ | |
d62a17ae | 1481 | m->handler.copycount = m->handler.pfdcount; |
1482 | memcpy(m->handler.copy, m->handler.pfds, | |
1483 | m->handler.copycount * sizeof(struct pollfd)); | |
1484 | ||
e3c9529e QY |
1485 | pthread_mutex_unlock(&m->mtx); |
1486 | { | |
1487 | num = fd_poll(m, m->handler.copy, m->handler.pfdsize, | |
1488 | m->handler.copycount, tw); | |
1489 | } | |
1490 | pthread_mutex_lock(&m->mtx); | |
d764d2cc | 1491 | |
e3c9529e QY |
1492 | /* Handle any errors received in poll() */ |
1493 | if (num < 0) { | |
1494 | if (errno == EINTR) { | |
d62a17ae | 1495 | pthread_mutex_unlock(&m->mtx); |
e3c9529e QY |
1496 | /* loop around to signal handler */ |
1497 | continue; | |
d62a17ae | 1498 | } |
1499 | ||
e3c9529e | 1500 | /* else die */ |
450971aa | 1501 | flog_err(EC_LIB_SYSTEM_CALL, "poll() error: %s", |
9ef9495e | 1502 | safe_strerror(errno)); |
e3c9529e QY |
1503 | pthread_mutex_unlock(&m->mtx); |
1504 | fetch = NULL; | |
1505 | break; | |
bca37d17 | 1506 | } |
d62a17ae | 1507 | |
1508 | /* Post timers to ready queue. */ | |
1509 | monotime(&now); | |
1510 | thread_process_timers(m->timer, &now); | |
1511 | ||
1512 | /* Post I/O to ready queue. */ | |
1513 | if (num > 0) | |
1514 | thread_process_io(m, num); | |
1515 | ||
d62a17ae | 1516 | pthread_mutex_unlock(&m->mtx); |
1517 | ||
1518 | } while (!thread && m->spin); | |
1519 | ||
1520 | return fetch; | |
718e3744 | 1521 | } |
1522 | ||
d62a17ae | 1523 | static unsigned long timeval_elapsed(struct timeval a, struct timeval b) |
62f44022 | 1524 | { |
d62a17ae | 1525 | return (((a.tv_sec - b.tv_sec) * TIMER_SECOND_MICRO) |
1526 | + (a.tv_usec - b.tv_usec)); | |
62f44022 QY |
1527 | } |
1528 | ||
d62a17ae | 1529 | unsigned long thread_consumed_time(RUSAGE_T *now, RUSAGE_T *start, |
1530 | unsigned long *cputime) | |
718e3744 | 1531 | { |
d62a17ae | 1532 | /* This is 'user + sys' time. */ |
1533 | *cputime = timeval_elapsed(now->cpu.ru_utime, start->cpu.ru_utime) | |
1534 | + timeval_elapsed(now->cpu.ru_stime, start->cpu.ru_stime); | |
1535 | return timeval_elapsed(now->real, start->real); | |
8b70d0b0 | 1536 | } |
1537 | ||
50596be0 DS |
1538 | /* We should aim to yield after yield milliseconds, which defaults |
1539 | to THREAD_YIELD_TIME_SLOT . | |
8b70d0b0 | 1540 | Note: we are using real (wall clock) time for this calculation. |
1541 | It could be argued that CPU time may make more sense in certain | |
1542 | contexts. The things to consider are whether the thread may have | |
1543 | blocked (in which case wall time increases, but CPU time does not), | |
1544 | or whether the system is heavily loaded with other processes competing | |
d62a17ae | 1545 | for CPU time. On balance, wall clock time seems to make sense. |
8b70d0b0 | 1546 | Plus it has the added benefit that gettimeofday should be faster |
1547 | than calling getrusage. */ | |
d62a17ae | 1548 | int thread_should_yield(struct thread *thread) |
718e3744 | 1549 | { |
d62a17ae | 1550 | int result; |
1551 | pthread_mutex_lock(&thread->mtx); | |
1552 | { | |
1553 | result = monotime_since(&thread->real, NULL) | |
1554 | > (int64_t)thread->yield; | |
1555 | } | |
1556 | pthread_mutex_unlock(&thread->mtx); | |
1557 | return result; | |
50596be0 DS |
1558 | } |
1559 | ||
d62a17ae | 1560 | void thread_set_yield_time(struct thread *thread, unsigned long yield_time) |
50596be0 | 1561 | { |
d62a17ae | 1562 | pthread_mutex_lock(&thread->mtx); |
1563 | { | |
1564 | thread->yield = yield_time; | |
1565 | } | |
1566 | pthread_mutex_unlock(&thread->mtx); | |
718e3744 | 1567 | } |
1568 | ||
d62a17ae | 1569 | void thread_getrusage(RUSAGE_T *r) |
db9c0df9 | 1570 | { |
231db9a6 DS |
1571 | #if defined RUSAGE_THREAD |
1572 | #define FRR_RUSAGE RUSAGE_THREAD | |
1573 | #else | |
1574 | #define FRR_RUSAGE RUSAGE_SELF | |
1575 | #endif | |
d62a17ae | 1576 | monotime(&r->real); |
231db9a6 | 1577 | getrusage(FRR_RUSAGE, &(r->cpu)); |
db9c0df9 PJ |
1578 | } |
1579 | ||
fbcac826 QY |
1580 | /* |
1581 | * Call a thread. | |
1582 | * | |
1583 | * This function will atomically update the thread's usage history. At present | |
1584 | * this is the only spot where usage history is written. Nevertheless the code | |
1585 | * has been written such that the introduction of writers in the future should | |
1586 | * not need to update it provided the writers atomically perform only the | |
1587 | * operations done here, i.e. updating the total and maximum times. In | |
1588 | * particular, the maximum real and cpu times must be monotonically increasing | |
1589 | * or this code is not correct. | |
1590 | */ | |
d62a17ae | 1591 | void thread_call(struct thread *thread) |
718e3744 | 1592 | { |
fbcac826 QY |
1593 | _Atomic unsigned long realtime, cputime; |
1594 | unsigned long exp; | |
1595 | unsigned long helper; | |
d62a17ae | 1596 | RUSAGE_T before, after; |
cc8b13a0 | 1597 | |
d62a17ae | 1598 | GETRUSAGE(&before); |
1599 | thread->real = before.real; | |
718e3744 | 1600 | |
d62a17ae | 1601 | pthread_setspecific(thread_current, thread); |
1602 | (*thread->func)(thread); | |
1603 | pthread_setspecific(thread_current, NULL); | |
718e3744 | 1604 | |
d62a17ae | 1605 | GETRUSAGE(&after); |
718e3744 | 1606 | |
fbcac826 QY |
1607 | realtime = thread_consumed_time(&after, &before, &helper); |
1608 | cputime = helper; | |
1609 | ||
1610 | /* update realtime */ | |
1611 | atomic_fetch_add_explicit(&thread->hist->real.total, realtime, | |
1612 | memory_order_seq_cst); | |
1613 | exp = atomic_load_explicit(&thread->hist->real.max, | |
1614 | memory_order_seq_cst); | |
1615 | while (exp < realtime | |
1616 | && !atomic_compare_exchange_weak_explicit( | |
1617 | &thread->hist->real.max, &exp, realtime, | |
1618 | memory_order_seq_cst, memory_order_seq_cst)) | |
1619 | ; | |
1620 | ||
1621 | /* update cputime */ | |
1622 | atomic_fetch_add_explicit(&thread->hist->cpu.total, cputime, | |
1623 | memory_order_seq_cst); | |
1624 | exp = atomic_load_explicit(&thread->hist->cpu.max, | |
1625 | memory_order_seq_cst); | |
1626 | while (exp < cputime | |
1627 | && !atomic_compare_exchange_weak_explicit( | |
1628 | &thread->hist->cpu.max, &exp, cputime, | |
1629 | memory_order_seq_cst, memory_order_seq_cst)) | |
1630 | ; | |
1631 | ||
1632 | atomic_fetch_add_explicit(&thread->hist->total_calls, 1, | |
1633 | memory_order_seq_cst); | |
1634 | atomic_fetch_or_explicit(&thread->hist->types, 1 << thread->add_type, | |
1635 | memory_order_seq_cst); | |
718e3744 | 1636 | |
924b9229 | 1637 | #ifdef CONSUMED_TIME_CHECK |
d62a17ae | 1638 | if (realtime > CONSUMED_TIME_CHECK) { |
1639 | /* | |
1640 | * We have a CPU Hog on our hands. | |
1641 | * Whinge about it now, so we're aware this is yet another task | |
1642 | * to fix. | |
1643 | */ | |
9ef9495e | 1644 | flog_warn( |
450971aa | 1645 | EC_LIB_SLOW_THREAD, |
d62a17ae | 1646 | "SLOW THREAD: task %s (%lx) ran for %lums (cpu time %lums)", |
1647 | thread->funcname, (unsigned long)thread->func, | |
1648 | realtime / 1000, cputime / 1000); | |
1649 | } | |
924b9229 | 1650 | #endif /* CONSUMED_TIME_CHECK */ |
718e3744 | 1651 | } |
1652 | ||
1653 | /* Execute thread */ | |
d62a17ae | 1654 | void funcname_thread_execute(struct thread_master *m, |
1655 | int (*func)(struct thread *), void *arg, int val, | |
1656 | debugargdef) | |
718e3744 | 1657 | { |
c4345fbf | 1658 | struct thread *thread; |
718e3744 | 1659 | |
c4345fbf RZ |
1660 | /* Get or allocate new thread to execute. */ |
1661 | pthread_mutex_lock(&m->mtx); | |
1662 | { | |
1663 | thread = thread_get(m, THREAD_EVENT, func, arg, debugargpass); | |
9c7753e4 | 1664 | |
c4345fbf RZ |
1665 | /* Set its event value. */ |
1666 | pthread_mutex_lock(&thread->mtx); | |
1667 | { | |
1668 | thread->add_type = THREAD_EXECUTE; | |
1669 | thread->u.val = val; | |
1670 | thread->ref = &thread; | |
1671 | } | |
1672 | pthread_mutex_unlock(&thread->mtx); | |
1673 | } | |
1674 | pthread_mutex_unlock(&m->mtx); | |
f7c62e11 | 1675 | |
c4345fbf RZ |
1676 | /* Execute thread doing all accounting. */ |
1677 | thread_call(thread); | |
9c7753e4 | 1678 | |
c4345fbf RZ |
1679 | /* Give back or free thread. */ |
1680 | thread_add_unuse(m, thread); | |
718e3744 | 1681 | } |