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cd748f27 | 1 | /* |
bbc27441 | 2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors |
cd748f27 | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
cd748f27 | 7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 43 AIOPS */ |
10 | ||
e4116bdb | 11 | #ifndef _REENTRANT |
12 | #error "_REENTRANT MUST be defined to build squid async io support." | |
13 | #endif | |
14 | ||
582c2af2 | 15 | #include "squid.h" |
074d6a40 | 16 | #include "DiskIO/DiskThreads/CommIO.h" |
b9ae18aa | 17 | #include "DiskThreads.h" |
4d5904f7 | 18 | #include "SquidConfig.h" |
074d6a40 AJ |
19 | #include "SquidTime.h" |
20 | #include "Store.h" | |
cd748f27 | 21 | |
ed6e9fb9 AJ |
22 | /* |
23 | * struct stat and squidaio_xstrdup use explicit pool alloc()/freeOne(). | |
24 | * XXX: convert to MEMPROXY_CLASS() API | |
25 | */ | |
26 | #include "mem/Pool.h" | |
27 | ||
1a30fdf5 | 28 | #include <cerrno> |
074d6a40 | 29 | #include <csignal> |
4d5904f7 FC |
30 | #include <sys/stat.h> |
31 | #include <fcntl.h> | |
32 | #include <pthread.h> | |
4d5904f7 | 33 | #include <dirent.h> |
cd748f27 | 34 | #if HAVE_SCHED_H |
4d5904f7 | 35 | #include <sched.h> |
cd748f27 | 36 | #endif |
37 | ||
38 | #define RIDICULOUS_LENGTH 4096 | |
39 | ||
c04d4f40 | 40 | enum _squidaio_thread_status { |
cd748f27 | 41 | _THREAD_STARTING = 0, |
42 | _THREAD_WAITING, | |
43 | _THREAD_BUSY, | |
44 | _THREAD_FAILED, | |
45 | _THREAD_DONE | |
46 | }; | |
c04d4f40 | 47 | typedef enum _squidaio_thread_status squidaio_thread_status; |
cd748f27 | 48 | |
26ac0430 | 49 | typedef struct squidaio_request_t { |
62e76326 | 50 | |
c04d4f40 | 51 | struct squidaio_request_t *next; |
52 | squidaio_request_type request_type; | |
cd748f27 | 53 | int cancelled; |
54 | char *path; | |
55 | int oflag; | |
56 | mode_t mode; | |
57 | int fd; | |
58 | char *bufferp; | |
ee139403 | 59 | size_t buflen; |
cd748f27 | 60 | off_t offset; |
61 | int whence; | |
62 | int ret; | |
63 | int err; | |
62e76326 | 64 | |
cd748f27 | 65 | struct stat *tmpstatp; |
62e76326 | 66 | |
cd748f27 | 67 | struct stat *statp; |
c04d4f40 | 68 | squidaio_result_t *resultp; |
2fadd50d | 69 | } squidaio_request_t; |
cd748f27 | 70 | |
26ac0430 | 71 | typedef struct squidaio_request_queue_t { |
55f0e6f7 | 72 | pthread_mutex_t mutex; |
73 | pthread_cond_t cond; | |
c04d4f40 | 74 | squidaio_request_t *volatile head; |
75 | squidaio_request_t *volatile *volatile tailp; | |
55f0e6f7 | 76 | unsigned long requests; |
f0debecb | 77 | unsigned long blocked; /* main failed to lock the queue */ |
2fadd50d | 78 | } squidaio_request_queue_t; |
55f0e6f7 | 79 | |
c04d4f40 | 80 | typedef struct squidaio_thread_t squidaio_thread_t; |
62e76326 | 81 | |
26ac0430 | 82 | struct squidaio_thread_t { |
c04d4f40 | 83 | squidaio_thread_t *next; |
cd748f27 | 84 | pthread_t thread; |
c04d4f40 | 85 | squidaio_thread_status status; |
62e76326 | 86 | |
c04d4f40 | 87 | struct squidaio_request_t *current_req; |
55f0e6f7 | 88 | unsigned long requests; |
89 | }; | |
cd748f27 | 90 | |
c04d4f40 | 91 | static void squidaio_queue_request(squidaio_request_t *); |
92 | static void squidaio_cleanup_request(squidaio_request_t *); | |
d9c252f2 | 93 | void *squidaio_thread_loop(void *); |
c04d4f40 | 94 | static void squidaio_do_open(squidaio_request_t *); |
95 | static void squidaio_do_read(squidaio_request_t *); | |
96 | static void squidaio_do_write(squidaio_request_t *); | |
97 | static void squidaio_do_close(squidaio_request_t *); | |
98 | static void squidaio_do_stat(squidaio_request_t *); | |
efa3acd1 | 99 | static void squidaio_do_unlink(squidaio_request_t *); |
cd748f27 | 100 | #if AIO_OPENDIR |
c04d4f40 | 101 | static void *squidaio_do_opendir(squidaio_request_t *); |
cd748f27 | 102 | #endif |
c04d4f40 | 103 | static void squidaio_debug(squidaio_request_t *); |
104 | static void squidaio_poll_queues(void); | |
cd748f27 | 105 | |
c04d4f40 | 106 | static squidaio_thread_t *threads = NULL; |
107 | static int squidaio_initialised = 0; | |
cd748f27 | 108 | |
58cd5bbd | 109 | #define AIO_LARGE_BUFS 16384 |
110 | #define AIO_MEDIUM_BUFS AIO_LARGE_BUFS >> 1 | |
111 | #define AIO_SMALL_BUFS AIO_LARGE_BUFS >> 2 | |
112 | #define AIO_TINY_BUFS AIO_LARGE_BUFS >> 3 | |
55f0e6f7 | 113 | #define AIO_MICRO_BUFS 128 |
58cd5bbd | 114 | |
a3efa961 | 115 | static MemAllocator *squidaio_large_bufs = NULL; /* 16K */ |
116 | static MemAllocator *squidaio_medium_bufs = NULL; /* 8K */ | |
117 | static MemAllocator *squidaio_small_bufs = NULL; /* 4K */ | |
118 | static MemAllocator *squidaio_tiny_bufs = NULL; /* 2K */ | |
119 | static MemAllocator *squidaio_micro_bufs = NULL; /* 128K */ | |
58cd5bbd | 120 | |
cd748f27 | 121 | static int request_queue_len = 0; |
a3efa961 | 122 | static MemAllocator *squidaio_request_pool = NULL; |
123 | static MemAllocator *squidaio_thread_pool = NULL; | |
c04d4f40 | 124 | static squidaio_request_queue_t request_queue; |
62e76326 | 125 | |
26ac0430 | 126 | static struct { |
c04d4f40 | 127 | squidaio_request_t *head, **tailp; |
62e76326 | 128 | } |
f0debecb | 129 | |
62e76326 | 130 | request_queue2 = { |
131 | ||
26ac0430 AJ |
132 | NULL, &request_queue2.head |
133 | }; | |
c04d4f40 | 134 | static squidaio_request_queue_t done_queue; |
62e76326 | 135 | |
26ac0430 | 136 | static struct { |
c04d4f40 | 137 | squidaio_request_t *head, **tailp; |
62e76326 | 138 | } |
f0debecb | 139 | |
62e76326 | 140 | done_requests = { |
141 | ||
26ac0430 AJ |
142 | NULL, &done_requests.head |
143 | }; | |
cd748f27 | 144 | static pthread_attr_t globattr; |
5e5c622b | 145 | #if HAVE_SCHED_H |
62e76326 | 146 | |
cd748f27 | 147 | static struct sched_param globsched; |
5e5c622b | 148 | #endif |
cd748f27 | 149 | static pthread_t main_thread; |
150 | ||
a3efa961 | 151 | static MemAllocator * |
c04d4f40 | 152 | squidaio_get_pool(int size) |
58cd5bbd | 153 | { |
58cd5bbd | 154 | if (size <= AIO_LARGE_BUFS) { |
62e76326 | 155 | if (size <= AIO_MICRO_BUFS) |
a3efa961 | 156 | return squidaio_micro_bufs; |
62e76326 | 157 | else if (size <= AIO_TINY_BUFS) |
a3efa961 | 158 | return squidaio_tiny_bufs; |
62e76326 | 159 | else if (size <= AIO_SMALL_BUFS) |
a3efa961 | 160 | return squidaio_small_bufs; |
62e76326 | 161 | else if (size <= AIO_MEDIUM_BUFS) |
a3efa961 | 162 | return squidaio_medium_bufs; |
62e76326 | 163 | else |
a3efa961 | 164 | return squidaio_large_bufs; |
165 | } | |
62e76326 | 166 | |
a3efa961 | 167 | return NULL; |
58cd5bbd | 168 | } |
169 | ||
211f1d0b | 170 | void * |
c04d4f40 | 171 | squidaio_xmalloc(int size) |
58cd5bbd | 172 | { |
173 | void *p; | |
a3efa961 | 174 | MemAllocator *pool; |
58cd5bbd | 175 | |
c04d4f40 | 176 | if ((pool = squidaio_get_pool(size)) != NULL) { |
b001e822 | 177 | p = pool->alloc(); |
58cd5bbd | 178 | } else |
62e76326 | 179 | p = xmalloc(size); |
58cd5bbd | 180 | |
181 | return p; | |
182 | } | |
183 | ||
55f0e6f7 | 184 | static char * |
c04d4f40 | 185 | squidaio_xstrdup(const char *str) |
55f0e6f7 | 186 | { |
187 | char *p; | |
f0debecb | 188 | int len = strlen(str) + 1; |
55f0e6f7 | 189 | |
e6ccf245 | 190 | p = (char *)squidaio_xmalloc(len); |
55f0e6f7 | 191 | strncpy(p, str, len); |
192 | ||
193 | return p; | |
194 | } | |
195 | ||
211f1d0b | 196 | void |
c04d4f40 | 197 | squidaio_xfree(void *p, int size) |
58cd5bbd | 198 | { |
a3efa961 | 199 | MemAllocator *pool; |
58cd5bbd | 200 | |
c04d4f40 | 201 | if ((pool = squidaio_get_pool(size)) != NULL) { |
dc47f531 | 202 | pool->freeOne(p); |
58cd5bbd | 203 | } else |
62e76326 | 204 | xfree(p); |
58cd5bbd | 205 | } |
206 | ||
55f0e6f7 | 207 | static void |
c04d4f40 | 208 | squidaio_xstrfree(char *str) |
55f0e6f7 | 209 | { |
a3efa961 | 210 | MemAllocator *pool; |
f0debecb | 211 | int len = strlen(str) + 1; |
55f0e6f7 | 212 | |
c04d4f40 | 213 | if ((pool = squidaio_get_pool(len)) != NULL) { |
dc47f531 | 214 | pool->freeOne(str); |
55f0e6f7 | 215 | } else |
62e76326 | 216 | xfree(str); |
55f0e6f7 | 217 | } |
218 | ||
d06925a4 | 219 | void |
c04d4f40 | 220 | squidaio_init(void) |
cd748f27 | 221 | { |
222 | int i; | |
c04d4f40 | 223 | squidaio_thread_t *threadp; |
cd748f27 | 224 | |
c04d4f40 | 225 | if (squidaio_initialised) |
62e76326 | 226 | return; |
cd748f27 | 227 | |
228 | pthread_attr_init(&globattr); | |
62e76326 | 229 | |
cd748f27 | 230 | #if HAVE_PTHREAD_ATTR_SETSCOPE |
62e76326 | 231 | |
cd748f27 | 232 | pthread_attr_setscope(&globattr, PTHREAD_SCOPE_SYSTEM); |
62e76326 | 233 | |
cd748f27 | 234 | #endif |
5e5c622b | 235 | #if HAVE_SCHED_H |
62e76326 | 236 | |
cd748f27 | 237 | globsched.sched_priority = 1; |
62e76326 | 238 | |
5e5c622b | 239 | #endif |
62e76326 | 240 | |
cd748f27 | 241 | main_thread = pthread_self(); |
62e76326 | 242 | |
5e5c622b | 243 | #if HAVE_SCHED_H && HAVE_PTHREAD_SETSCHEDPARAM |
62e76326 | 244 | |
cd748f27 | 245 | pthread_setschedparam(main_thread, SCHED_OTHER, &globsched); |
62e76326 | 246 | |
cd748f27 | 247 | #endif |
5e5c622b | 248 | #if HAVE_SCHED_H |
62e76326 | 249 | |
cd748f27 | 250 | globsched.sched_priority = 2; |
62e76326 | 251 | |
5e5c622b | 252 | #endif |
253 | #if HAVE_SCHED_H && HAVE_PTHREAD_ATTR_SETSCHEDPARAM | |
62e76326 | 254 | |
cd748f27 | 255 | pthread_attr_setschedparam(&globattr, &globsched); |
62e76326 | 256 | |
cd748f27 | 257 | #endif |
258 | ||
5a3501d2 | 259 | /* Give each thread a smaller 256KB stack, should be more than sufficient */ |
260 | pthread_attr_setstacksize(&globattr, 256 * 1024); | |
261 | ||
55f0e6f7 | 262 | /* Initialize request queue */ |
263 | if (pthread_mutex_init(&(request_queue.mutex), NULL)) | |
62e76326 | 264 | fatal("Failed to create mutex"); |
265 | ||
55f0e6f7 | 266 | if (pthread_cond_init(&(request_queue.cond), NULL)) |
62e76326 | 267 | fatal("Failed to create condition variable"); |
268 | ||
55f0e6f7 | 269 | request_queue.head = NULL; |
62e76326 | 270 | |
55f0e6f7 | 271 | request_queue.tailp = &request_queue.head; |
62e76326 | 272 | |
55f0e6f7 | 273 | request_queue.requests = 0; |
62e76326 | 274 | |
55f0e6f7 | 275 | request_queue.blocked = 0; |
276 | ||
277 | /* Initialize done queue */ | |
278 | if (pthread_mutex_init(&(done_queue.mutex), NULL)) | |
62e76326 | 279 | fatal("Failed to create mutex"); |
280 | ||
55f0e6f7 | 281 | if (pthread_cond_init(&(done_queue.cond), NULL)) |
62e76326 | 282 | fatal("Failed to create condition variable"); |
283 | ||
55f0e6f7 | 284 | done_queue.head = NULL; |
62e76326 | 285 | |
55f0e6f7 | 286 | done_queue.tailp = &done_queue.head; |
62e76326 | 287 | |
55f0e6f7 | 288 | done_queue.requests = 0; |
62e76326 | 289 | |
55f0e6f7 | 290 | done_queue.blocked = 0; |
cd748f27 | 291 | |
45bb0381 AJ |
292 | // Initialize the thread I/O pipes before creating any threads |
293 | // see bug 3189 comment 5 about race conditions. | |
294 | CommIO::Initialize(); | |
295 | ||
55f0e6f7 | 296 | /* Create threads and get them to sit in their wait loop */ |
04eb0689 | 297 | squidaio_thread_pool = memPoolCreate("aio_thread", sizeof(squidaio_thread_t)); |
62e76326 | 298 | |
9fbbe256 | 299 | assert(NUMTHREADS); |
62e76326 | 300 | |
cb4185f1 | 301 | for (i = 0; i < NUMTHREADS; ++i) { |
b001e822 | 302 | threadp = (squidaio_thread_t *)squidaio_thread_pool->alloc(); |
62e76326 | 303 | threadp->status = _THREAD_STARTING; |
304 | threadp->current_req = NULL; | |
305 | threadp->requests = 0; | |
306 | threadp->next = threads; | |
307 | threads = threadp; | |
308 | ||
309 | if (pthread_create(&threadp->thread, &globattr, squidaio_thread_loop, threadp)) { | |
310 | fprintf(stderr, "Thread creation failed\n"); | |
311 | threadp->status = _THREAD_FAILED; | |
312 | continue; | |
313 | } | |
cd748f27 | 314 | } |
315 | ||
316 | /* Create request pool */ | |
04eb0689 | 317 | squidaio_request_pool = memPoolCreate("aio_request", sizeof(squidaio_request_t)); |
62e76326 | 318 | |
04eb0689 | 319 | squidaio_large_bufs = memPoolCreate("squidaio_large_bufs", AIO_LARGE_BUFS); |
62e76326 | 320 | |
04eb0689 | 321 | squidaio_medium_bufs = memPoolCreate("squidaio_medium_bufs", AIO_MEDIUM_BUFS); |
62e76326 | 322 | |
04eb0689 | 323 | squidaio_small_bufs = memPoolCreate("squidaio_small_bufs", AIO_SMALL_BUFS); |
62e76326 | 324 | |
04eb0689 | 325 | squidaio_tiny_bufs = memPoolCreate("squidaio_tiny_bufs", AIO_TINY_BUFS); |
62e76326 | 326 | |
04eb0689 | 327 | squidaio_micro_bufs = memPoolCreate("squidaio_micro_bufs", AIO_MICRO_BUFS); |
c04d4f40 | 328 | |
329 | squidaio_initialised = 1; | |
cd748f27 | 330 | } |
331 | ||
d06925a4 | 332 | void |
333 | squidaio_shutdown(void) | |
334 | { | |
335 | if (!squidaio_initialised) | |
336 | return; | |
337 | ||
338 | /* This is the same as in squidaio_sync */ | |
339 | do { | |
340 | squidaio_poll_queues(); | |
341 | } while (request_queue_len > 0); | |
342 | ||
343 | CommIO::NotifyIOClose(); | |
344 | ||
345 | squidaio_initialised = 0; | |
346 | } | |
cd748f27 | 347 | |
59a09b98 | 348 | void * |
c04d4f40 | 349 | squidaio_thread_loop(void *ptr) |
cd748f27 | 350 | { |
e6ccf245 | 351 | squidaio_thread_t *threadp = (squidaio_thread_t *)ptr; |
c04d4f40 | 352 | squidaio_request_t *request; |
e6ccf245 | 353 | sigset_t newSig; |
cd748f27 | 354 | |
355 | /* | |
356 | * Make sure to ignore signals which may possibly get sent to | |
357 | * the parent squid thread. Causes havoc with mutex's and | |
358 | * condition waits otherwise | |
359 | */ | |
360 | ||
e6ccf245 | 361 | sigemptyset(&newSig); |
362 | sigaddset(&newSig, SIGPIPE); | |
363 | sigaddset(&newSig, SIGCHLD); | |
605f2c3e | 364 | #if defined(_SQUID_LINUX_THREADS_) |
62e76326 | 365 | |
e6ccf245 | 366 | sigaddset(&newSig, SIGQUIT); |
367 | sigaddset(&newSig, SIGTRAP); | |
cd748f27 | 368 | #else |
62e76326 | 369 | |
e6ccf245 | 370 | sigaddset(&newSig, SIGUSR1); |
371 | sigaddset(&newSig, SIGUSR2); | |
cd748f27 | 372 | #endif |
62e76326 | 373 | |
e6ccf245 | 374 | sigaddset(&newSig, SIGHUP); |
375 | sigaddset(&newSig, SIGTERM); | |
376 | sigaddset(&newSig, SIGINT); | |
377 | sigaddset(&newSig, SIGALRM); | |
378 | pthread_sigmask(SIG_BLOCK, &newSig, NULL); | |
cd748f27 | 379 | |
cd748f27 | 380 | while (1) { |
62e76326 | 381 | threadp->current_req = request = NULL; |
382 | request = NULL; | |
383 | /* Get a request to process */ | |
384 | threadp->status = _THREAD_WAITING; | |
385 | pthread_mutex_lock(&request_queue.mutex); | |
386 | ||
387 | while (!request_queue.head) { | |
388 | pthread_cond_wait(&request_queue.cond, &request_queue.mutex); | |
389 | } | |
390 | ||
391 | request = request_queue.head; | |
392 | ||
393 | if (request) | |
394 | request_queue.head = request->next; | |
395 | ||
396 | if (!request_queue.head) | |
397 | request_queue.tailp = &request_queue.head; | |
398 | ||
399 | pthread_mutex_unlock(&request_queue.mutex); | |
400 | ||
401 | /* process the request */ | |
402 | threadp->status = _THREAD_BUSY; | |
403 | ||
404 | request->next = NULL; | |
405 | ||
406 | threadp->current_req = request; | |
407 | ||
408 | errno = 0; | |
409 | ||
410 | if (!request->cancelled) { | |
411 | switch (request->request_type) { | |
412 | ||
413 | case _AIO_OP_OPEN: | |
414 | squidaio_do_open(request); | |
415 | break; | |
416 | ||
417 | case _AIO_OP_READ: | |
418 | squidaio_do_read(request); | |
419 | break; | |
420 | ||
421 | case _AIO_OP_WRITE: | |
422 | squidaio_do_write(request); | |
423 | break; | |
424 | ||
425 | case _AIO_OP_CLOSE: | |
426 | squidaio_do_close(request); | |
427 | break; | |
428 | ||
efa3acd1 | 429 | case _AIO_OP_UNLINK: |
430 | squidaio_do_unlink(request); | |
431 | break; | |
432 | ||
cd748f27 | 433 | #if AIO_OPENDIR /* Opendir not implemented yet */ |
62e76326 | 434 | |
435 | case _AIO_OP_OPENDIR: | |
436 | squidaio_do_opendir(request); | |
437 | break; | |
cd748f27 | 438 | #endif |
62e76326 | 439 | |
440 | case _AIO_OP_STAT: | |
441 | squidaio_do_stat(request); | |
442 | break; | |
443 | ||
444 | default: | |
445 | request->ret = -1; | |
446 | request->err = EINVAL; | |
447 | break; | |
448 | } | |
449 | } else { /* cancelled */ | |
450 | request->ret = -1; | |
451 | request->err = EINTR; | |
452 | } | |
453 | ||
454 | threadp->status = _THREAD_DONE; | |
455 | /* put the request in the done queue */ | |
456 | pthread_mutex_lock(&done_queue.mutex); | |
457 | *done_queue.tailp = request; | |
458 | done_queue.tailp = &request->next; | |
459 | pthread_mutex_unlock(&done_queue.mutex); | |
460 | CommIO::NotifyIOCompleted(); | |
cb4185f1 | 461 | ++ threadp->requests; |
55f0e6f7 | 462 | } /* while forever */ |
62e76326 | 463 | |
cd748f27 | 464 | return NULL; |
c04d4f40 | 465 | } /* squidaio_thread_loop */ |
cd748f27 | 466 | |
467 | static void | |
c04d4f40 | 468 | squidaio_queue_request(squidaio_request_t * request) |
cd748f27 | 469 | { |
cd748f27 | 470 | static int high_start = 0; |
bf8fe701 | 471 | debugs(43, 9, "squidaio_queue_request: " << request << " type=" << request->request_type << " result=" << request->resultp); |
cd748f27 | 472 | /* Mark it as not executed (failing result, no error) */ |
55f0e6f7 | 473 | request->ret = -1; |
474 | request->err = 0; | |
475 | /* Internal housekeeping */ | |
476 | request_queue_len += 1; | |
477 | request->resultp->_data = request; | |
478 | /* Play some tricks with the request_queue2 queue */ | |
479 | request->next = NULL; | |
62e76326 | 480 | |
40173038 | 481 | if (pthread_mutex_trylock(&request_queue.mutex) == 0) { |
62e76326 | 482 | if (request_queue2.head) { |
483 | /* Grab blocked requests */ | |
484 | *request_queue.tailp = request_queue2.head; | |
485 | request_queue.tailp = request_queue2.tailp; | |
486 | } | |
487 | ||
488 | /* Enqueue request */ | |
489 | *request_queue.tailp = request; | |
490 | ||
491 | request_queue.tailp = &request->next; | |
492 | ||
493 | pthread_cond_signal(&request_queue.cond); | |
494 | ||
495 | pthread_mutex_unlock(&request_queue.mutex); | |
496 | ||
497 | if (request_queue2.head) { | |
498 | /* Clear queue of blocked requests */ | |
499 | request_queue2.head = NULL; | |
500 | request_queue2.tailp = &request_queue2.head; | |
501 | } | |
40173038 | 502 | } else { |
62e76326 | 503 | /* Oops, the request queue is blocked, use request_queue2 */ |
504 | *request_queue2.tailp = request; | |
505 | request_queue2.tailp = &request->next; | |
55f0e6f7 | 506 | } |
62e76326 | 507 | |
55f0e6f7 | 508 | if (request_queue2.head) { |
62e76326 | 509 | static int filter = 0; |
510 | static int filter_limit = 8; | |
511 | ||
512 | if (++filter >= filter_limit) { | |
513 | filter_limit += filter; | |
514 | filter = 0; | |
e0236918 | 515 | debugs(43, DBG_IMPORTANT, "squidaio_queue_request: WARNING - Queue congestion"); |
62e76326 | 516 | } |
cd748f27 | 517 | } |
62e76326 | 518 | |
cd748f27 | 519 | /* Warn if out of threads */ |
55f0e6f7 | 520 | if (request_queue_len > MAGIC1) { |
62e76326 | 521 | static int last_warn = 0; |
522 | static int queue_high, queue_low; | |
523 | ||
524 | if (high_start == 0) { | |
525 | high_start = squid_curtime; | |
526 | queue_high = request_queue_len; | |
527 | queue_low = request_queue_len; | |
528 | } | |
529 | ||
530 | if (request_queue_len > queue_high) | |
531 | queue_high = request_queue_len; | |
532 | ||
533 | if (request_queue_len < queue_low) | |
534 | queue_low = request_queue_len; | |
535 | ||
536 | if (squid_curtime >= (last_warn + 15) && | |
537 | squid_curtime >= (high_start + 5)) { | |
e0236918 | 538 | debugs(43, DBG_IMPORTANT, "squidaio_queue_request: WARNING - Disk I/O overloading"); |
62e76326 | 539 | |
540 | if (squid_curtime >= (high_start + 15)) | |
e0236918 | 541 | debugs(43, DBG_IMPORTANT, "squidaio_queue_request: Queue Length: current=" << |
bf8fe701 | 542 | request_queue_len << ", high=" << queue_high << |
543 | ", low=" << queue_low << ", duration=" << | |
544 | (long int) (squid_curtime - high_start)); | |
62e76326 | 545 | |
546 | last_warn = squid_curtime; | |
547 | } | |
cd748f27 | 548 | } else { |
62e76326 | 549 | high_start = 0; |
cd748f27 | 550 | } |
62e76326 | 551 | |
55f0e6f7 | 552 | /* Warn if seriously overloaded */ |
cd748f27 | 553 | if (request_queue_len > RIDICULOUS_LENGTH) { |
fa84c01d FC |
554 | debugs(43, DBG_CRITICAL, "squidaio_queue_request: Async request queue growing uncontrollably!"); |
555 | debugs(43, DBG_CRITICAL, "squidaio_queue_request: Syncing pending I/O operations.. (blocking)"); | |
62e76326 | 556 | squidaio_sync(); |
fa84c01d | 557 | debugs(43, DBG_CRITICAL, "squidaio_queue_request: Synced"); |
cd748f27 | 558 | } |
c04d4f40 | 559 | } /* squidaio_queue_request */ |
cd748f27 | 560 | |
cd748f27 | 561 | static void |
c04d4f40 | 562 | squidaio_cleanup_request(squidaio_request_t * requestp) |
cd748f27 | 563 | { |
c04d4f40 | 564 | squidaio_result_t *resultp = requestp->resultp; |
cd748f27 | 565 | int cancelled = requestp->cancelled; |
566 | ||
567 | /* Free allocated structures and copy data back to user space if the */ | |
568 | /* request hasn't been cancelled */ | |
62e76326 | 569 | |
cd748f27 | 570 | switch (requestp->request_type) { |
62e76326 | 571 | |
cd748f27 | 572 | case _AIO_OP_STAT: |
62e76326 | 573 | |
574 | if (!cancelled && requestp->ret == 0) | |
41d00cd3 | 575 | memcpy(requestp->statp, requestp->tmpstatp, sizeof(struct stat)); |
62e76326 | 576 | |
577 | squidaio_xfree(requestp->tmpstatp, sizeof(struct stat)); | |
578 | ||
579 | squidaio_xstrfree(requestp->path); | |
580 | ||
581 | break; | |
582 | ||
cd748f27 | 583 | case _AIO_OP_OPEN: |
62e76326 | 584 | if (cancelled && requestp->ret >= 0) |
585 | /* The open() was cancelled but completed */ | |
586 | close(requestp->ret); | |
587 | ||
588 | squidaio_xstrfree(requestp->path); | |
589 | ||
590 | break; | |
591 | ||
cd748f27 | 592 | case _AIO_OP_CLOSE: |
62e76326 | 593 | if (cancelled && requestp->ret < 0) |
594 | /* The close() was cancelled and never got executed */ | |
595 | close(requestp->fd); | |
596 | ||
597 | break; | |
598 | ||
cd748f27 | 599 | case _AIO_OP_UNLINK: |
62e76326 | 600 | |
cd748f27 | 601 | case _AIO_OP_OPENDIR: |
62e76326 | 602 | squidaio_xstrfree(requestp->path); |
603 | ||
604 | break; | |
605 | ||
cd748f27 | 606 | case _AIO_OP_READ: |
62e76326 | 607 | break; |
608 | ||
cd748f27 | 609 | case _AIO_OP_WRITE: |
62e76326 | 610 | break; |
611 | ||
cd748f27 | 612 | default: |
62e76326 | 613 | break; |
cd748f27 | 614 | } |
62e76326 | 615 | |
cd748f27 | 616 | if (resultp != NULL && !cancelled) { |
62e76326 | 617 | resultp->aio_return = requestp->ret; |
618 | resultp->aio_errno = requestp->err; | |
cd748f27 | 619 | } |
62e76326 | 620 | |
dc47f531 | 621 | squidaio_request_pool->freeOne(requestp); |
c04d4f40 | 622 | } /* squidaio_cleanup_request */ |
cd748f27 | 623 | |
cd748f27 | 624 | int |
c04d4f40 | 625 | squidaio_cancel(squidaio_result_t * resultp) |
cd748f27 | 626 | { |
e6ccf245 | 627 | squidaio_request_t *request = (squidaio_request_t *)resultp->_data; |
cd748f27 | 628 | |
55f0e6f7 | 629 | if (request && request->resultp == resultp) { |
bf8fe701 | 630 | debugs(43, 9, "squidaio_cancel: " << request << " type=" << request->request_type << " result=" << request->resultp); |
62e76326 | 631 | request->cancelled = 1; |
632 | request->resultp = NULL; | |
633 | resultp->_data = NULL; | |
634 | resultp->result_type = _AIO_OP_NONE; | |
635 | return 0; | |
55f0e6f7 | 636 | } |
62e76326 | 637 | |
cd748f27 | 638 | return 1; |
c04d4f40 | 639 | } /* squidaio_cancel */ |
cd748f27 | 640 | |
cd748f27 | 641 | int |
c04d4f40 | 642 | squidaio_open(const char *path, int oflag, mode_t mode, squidaio_result_t * resultp) |
cd748f27 | 643 | { |
e65c313f | 644 | squidaio_init(); |
c04d4f40 | 645 | squidaio_request_t *requestp; |
cd748f27 | 646 | |
b001e822 | 647 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 648 | |
c04d4f40 | 649 | requestp->path = (char *) squidaio_xstrdup(path); |
62e76326 | 650 | |
cd748f27 | 651 | requestp->oflag = oflag; |
62e76326 | 652 | |
cd748f27 | 653 | requestp->mode = mode; |
62e76326 | 654 | |
cd748f27 | 655 | requestp->resultp = resultp; |
62e76326 | 656 | |
cd748f27 | 657 | requestp->request_type = _AIO_OP_OPEN; |
62e76326 | 658 | |
cd748f27 | 659 | requestp->cancelled = 0; |
62e76326 | 660 | |
12e137b0 | 661 | resultp->result_type = _AIO_OP_OPEN; |
cd748f27 | 662 | |
c04d4f40 | 663 | squidaio_queue_request(requestp); |
62e76326 | 664 | |
cd748f27 | 665 | return 0; |
666 | } | |
667 | ||
cd748f27 | 668 | static void |
c04d4f40 | 669 | squidaio_do_open(squidaio_request_t * requestp) |
cd748f27 | 670 | { |
671 | requestp->ret = open(requestp->path, requestp->oflag, requestp->mode); | |
672 | requestp->err = errno; | |
673 | } | |
674 | ||
cd748f27 | 675 | int |
ee139403 | 676 | squidaio_read(int fd, char *bufp, size_t bufs, off_t offset, int whence, squidaio_result_t * resultp) |
cd748f27 | 677 | { |
c04d4f40 | 678 | squidaio_request_t *requestp; |
cd748f27 | 679 | |
b001e822 | 680 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 681 | |
cd748f27 | 682 | requestp->fd = fd; |
62e76326 | 683 | |
cd748f27 | 684 | requestp->bufferp = bufp; |
62e76326 | 685 | |
cd748f27 | 686 | requestp->buflen = bufs; |
62e76326 | 687 | |
cd748f27 | 688 | requestp->offset = offset; |
62e76326 | 689 | |
cd748f27 | 690 | requestp->whence = whence; |
62e76326 | 691 | |
cd748f27 | 692 | requestp->resultp = resultp; |
62e76326 | 693 | |
cd748f27 | 694 | requestp->request_type = _AIO_OP_READ; |
62e76326 | 695 | |
cd748f27 | 696 | requestp->cancelled = 0; |
62e76326 | 697 | |
12e137b0 | 698 | resultp->result_type = _AIO_OP_READ; |
cd748f27 | 699 | |
c04d4f40 | 700 | squidaio_queue_request(requestp); |
62e76326 | 701 | |
cd748f27 | 702 | return 0; |
703 | } | |
704 | ||
cd748f27 | 705 | static void |
c04d4f40 | 706 | squidaio_do_read(squidaio_request_t * requestp) |
cd748f27 | 707 | { |
e19994df TH |
708 | if (lseek(requestp->fd, requestp->offset, requestp->whence) >= 0) |
709 | requestp->ret = read(requestp->fd, requestp->bufferp, requestp->buflen); | |
710 | else | |
711 | requestp->ret = -1; | |
cd748f27 | 712 | requestp->err = errno; |
713 | } | |
714 | ||
cd748f27 | 715 | int |
ee139403 | 716 | squidaio_write(int fd, char *bufp, size_t bufs, off_t offset, int whence, squidaio_result_t * resultp) |
cd748f27 | 717 | { |
c04d4f40 | 718 | squidaio_request_t *requestp; |
cd748f27 | 719 | |
b001e822 | 720 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 721 | |
cd748f27 | 722 | requestp->fd = fd; |
62e76326 | 723 | |
d06925a4 | 724 | requestp->bufferp = bufp; |
62e76326 | 725 | |
cd748f27 | 726 | requestp->buflen = bufs; |
62e76326 | 727 | |
cd748f27 | 728 | requestp->offset = offset; |
62e76326 | 729 | |
cd748f27 | 730 | requestp->whence = whence; |
62e76326 | 731 | |
cd748f27 | 732 | requestp->resultp = resultp; |
62e76326 | 733 | |
cd748f27 | 734 | requestp->request_type = _AIO_OP_WRITE; |
62e76326 | 735 | |
cd748f27 | 736 | requestp->cancelled = 0; |
62e76326 | 737 | |
12e137b0 | 738 | resultp->result_type = _AIO_OP_WRITE; |
cd748f27 | 739 | |
c04d4f40 | 740 | squidaio_queue_request(requestp); |
62e76326 | 741 | |
cd748f27 | 742 | return 0; |
743 | } | |
744 | ||
cd748f27 | 745 | static void |
c04d4f40 | 746 | squidaio_do_write(squidaio_request_t * requestp) |
cd748f27 | 747 | { |
d06925a4 | 748 | requestp->ret = write(requestp->fd, requestp->bufferp, requestp->buflen); |
cd748f27 | 749 | requestp->err = errno; |
750 | } | |
751 | ||
cd748f27 | 752 | int |
c04d4f40 | 753 | squidaio_close(int fd, squidaio_result_t * resultp) |
cd748f27 | 754 | { |
c04d4f40 | 755 | squidaio_request_t *requestp; |
cd748f27 | 756 | |
b001e822 | 757 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 758 | |
cd748f27 | 759 | requestp->fd = fd; |
62e76326 | 760 | |
cd748f27 | 761 | requestp->resultp = resultp; |
62e76326 | 762 | |
cd748f27 | 763 | requestp->request_type = _AIO_OP_CLOSE; |
62e76326 | 764 | |
cd748f27 | 765 | requestp->cancelled = 0; |
62e76326 | 766 | |
12e137b0 | 767 | resultp->result_type = _AIO_OP_CLOSE; |
cd748f27 | 768 | |
c04d4f40 | 769 | squidaio_queue_request(requestp); |
62e76326 | 770 | |
cd748f27 | 771 | return 0; |
772 | } | |
773 | ||
cd748f27 | 774 | static void |
c04d4f40 | 775 | squidaio_do_close(squidaio_request_t * requestp) |
cd748f27 | 776 | { |
777 | requestp->ret = close(requestp->fd); | |
778 | requestp->err = errno; | |
779 | } | |
780 | ||
cd748f27 | 781 | int |
62e76326 | 782 | |
c04d4f40 | 783 | squidaio_stat(const char *path, struct stat *sb, squidaio_result_t * resultp) |
cd748f27 | 784 | { |
e65c313f | 785 | squidaio_init(); |
c04d4f40 | 786 | squidaio_request_t *requestp; |
cd748f27 | 787 | |
b001e822 | 788 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 789 | |
c04d4f40 | 790 | requestp->path = (char *) squidaio_xstrdup(path); |
62e76326 | 791 | |
cd748f27 | 792 | requestp->statp = sb; |
62e76326 | 793 | |
c04d4f40 | 794 | requestp->tmpstatp = (struct stat *) squidaio_xmalloc(sizeof(struct stat)); |
62e76326 | 795 | |
cd748f27 | 796 | requestp->resultp = resultp; |
62e76326 | 797 | |
cd748f27 | 798 | requestp->request_type = _AIO_OP_STAT; |
62e76326 | 799 | |
cd748f27 | 800 | requestp->cancelled = 0; |
62e76326 | 801 | |
12e137b0 | 802 | resultp->result_type = _AIO_OP_STAT; |
cd748f27 | 803 | |
c04d4f40 | 804 | squidaio_queue_request(requestp); |
62e76326 | 805 | |
cd748f27 | 806 | return 0; |
807 | } | |
808 | ||
cd748f27 | 809 | static void |
c04d4f40 | 810 | squidaio_do_stat(squidaio_request_t * requestp) |
cd748f27 | 811 | { |
812 | requestp->ret = stat(requestp->path, requestp->tmpstatp); | |
813 | requestp->err = errno; | |
814 | } | |
815 | ||
15a47d1d | 816 | int |
efa3acd1 | 817 | squidaio_unlink(const char *path, squidaio_result_t * resultp) |
15a47d1d | 818 | { |
e65c313f | 819 | squidaio_init(); |
c04d4f40 | 820 | squidaio_request_t *requestp; |
15a47d1d | 821 | |
b001e822 | 822 | requestp = (squidaio_request_t *)squidaio_request_pool->alloc(); |
62e76326 | 823 | |
efa3acd1 | 824 | requestp->path = squidaio_xstrdup(path); |
62e76326 | 825 | |
15a47d1d | 826 | requestp->resultp = resultp; |
62e76326 | 827 | |
efa3acd1 | 828 | requestp->request_type = _AIO_OP_UNLINK; |
62e76326 | 829 | |
15a47d1d | 830 | requestp->cancelled = 0; |
62e76326 | 831 | |
efa3acd1 | 832 | resultp->result_type = _AIO_OP_UNLINK; |
15a47d1d | 833 | |
c04d4f40 | 834 | squidaio_queue_request(requestp); |
62e76326 | 835 | |
15a47d1d | 836 | return 0; |
837 | } | |
838 | ||
15a47d1d | 839 | static void |
efa3acd1 | 840 | squidaio_do_unlink(squidaio_request_t * requestp) |
15a47d1d | 841 | { |
efa3acd1 | 842 | requestp->ret = unlink(requestp->path); |
15a47d1d | 843 | requestp->err = errno; |
844 | } | |
845 | ||
cd748f27 | 846 | #if AIO_OPENDIR |
c04d4f40 | 847 | /* XXX squidaio_opendir NOT implemented yet.. */ |
cd748f27 | 848 | |
849 | int | |
c04d4f40 | 850 | squidaio_opendir(const char *path, squidaio_result_t * resultp) |
cd748f27 | 851 | { |
c04d4f40 | 852 | squidaio_request_t *requestp; |
cd748f27 | 853 | int len; |
854 | ||
b001e822 | 855 | requestp = squidaio_request_pool->alloc(); |
62e76326 | 856 | |
12e137b0 | 857 | resultp->result_type = _AIO_OP_OPENDIR; |
62e76326 | 858 | |
cd748f27 | 859 | return -1; |
860 | } | |
861 | ||
862 | static void | |
c04d4f40 | 863 | squidaio_do_opendir(squidaio_request_t * requestp) |
cd748f27 | 864 | { |
865 | /* NOT IMPLEMENTED */ | |
866 | } | |
867 | ||
868 | #endif | |
869 | ||
55f0e6f7 | 870 | static void |
c04d4f40 | 871 | squidaio_poll_queues(void) |
55f0e6f7 | 872 | { |
873 | /* kick "overflow" request queue */ | |
62e76326 | 874 | |
55f0e6f7 | 875 | if (request_queue2.head && |
62e76326 | 876 | pthread_mutex_trylock(&request_queue.mutex) == 0) { |
877 | *request_queue.tailp = request_queue2.head; | |
878 | request_queue.tailp = request_queue2.tailp; | |
879 | pthread_cond_signal(&request_queue.cond); | |
880 | pthread_mutex_unlock(&request_queue.mutex); | |
881 | request_queue2.head = NULL; | |
882 | request_queue2.tailp = &request_queue2.head; | |
55f0e6f7 | 883 | } |
62e76326 | 884 | |
55f0e6f7 | 885 | /* poll done queue */ |
886 | if (done_queue.head && pthread_mutex_trylock(&done_queue.mutex) == 0) { | |
62e76326 | 887 | |
888 | struct squidaio_request_t *requests = done_queue.head; | |
889 | done_queue.head = NULL; | |
890 | done_queue.tailp = &done_queue.head; | |
891 | pthread_mutex_unlock(&done_queue.mutex); | |
892 | *done_requests.tailp = requests; | |
893 | request_queue_len -= 1; | |
894 | ||
895 | while (requests->next) { | |
896 | requests = requests->next; | |
897 | request_queue_len -= 1; | |
898 | } | |
899 | ||
900 | done_requests.tailp = &requests->next; | |
55f0e6f7 | 901 | } |
55f0e6f7 | 902 | } |
cd748f27 | 903 | |
c04d4f40 | 904 | squidaio_result_t * |
905 | squidaio_poll_done(void) | |
cd748f27 | 906 | { |
c04d4f40 | 907 | squidaio_request_t *request; |
908 | squidaio_result_t *resultp; | |
cd748f27 | 909 | int cancelled; |
55f0e6f7 | 910 | int polled = 0; |
cd748f27 | 911 | |
62e76326 | 912 | AIO_REPOLL: |
55f0e6f7 | 913 | request = done_requests.head; |
62e76326 | 914 | |
55f0e6f7 | 915 | if (request == NULL && !polled) { |
62e76326 | 916 | CommIO::ResetNotifications(); |
917 | squidaio_poll_queues(); | |
918 | polled = 1; | |
919 | request = done_requests.head; | |
55f0e6f7 | 920 | } |
62e76326 | 921 | |
55f0e6f7 | 922 | if (!request) { |
62e76326 | 923 | return NULL; |
cd748f27 | 924 | } |
62e76326 | 925 | |
bf8fe701 | 926 | debugs(43, 9, "squidaio_poll_done: " << request << " type=" << request->request_type << " result=" << request->resultp); |
55f0e6f7 | 927 | done_requests.head = request->next; |
62e76326 | 928 | |
55f0e6f7 | 929 | if (!done_requests.head) |
62e76326 | 930 | done_requests.tailp = &done_requests.head; |
931 | ||
55f0e6f7 | 932 | resultp = request->resultp; |
62e76326 | 933 | |
55f0e6f7 | 934 | cancelled = request->cancelled; |
62e76326 | 935 | |
c04d4f40 | 936 | squidaio_debug(request); |
62e76326 | 937 | |
bf8fe701 | 938 | debugs(43, 5, "DONE: " << request->ret << " -> " << request->err); |
62e76326 | 939 | |
c04d4f40 | 940 | squidaio_cleanup_request(request); |
62e76326 | 941 | |
cd748f27 | 942 | if (cancelled) |
62e76326 | 943 | goto AIO_REPOLL; |
944 | ||
cd748f27 | 945 | return resultp; |
c04d4f40 | 946 | } /* squidaio_poll_done */ |
cd748f27 | 947 | |
948 | int | |
c04d4f40 | 949 | squidaio_operations_pending(void) |
cd748f27 | 950 | { |
55f0e6f7 | 951 | return request_queue_len + (done_requests.head ? 1 : 0); |
cd748f27 | 952 | } |
953 | ||
954 | int | |
c04d4f40 | 955 | squidaio_sync(void) |
cd748f27 | 956 | { |
55f0e6f7 | 957 | /* XXX This might take a while if the queue is large.. */ |
62e76326 | 958 | |
cd748f27 | 959 | do { |
62e76326 | 960 | squidaio_poll_queues(); |
cd748f27 | 961 | } while (request_queue_len > 0); |
62e76326 | 962 | |
c04d4f40 | 963 | return squidaio_operations_pending(); |
cd748f27 | 964 | } |
965 | ||
966 | int | |
c04d4f40 | 967 | squidaio_get_queue_len(void) |
cd748f27 | 968 | { |
969 | return request_queue_len; | |
970 | } | |
971 | ||
972 | static void | |
c04d4f40 | 973 | squidaio_debug(squidaio_request_t * request) |
cd748f27 | 974 | { |
55f0e6f7 | 975 | switch (request->request_type) { |
62e76326 | 976 | |
cd748f27 | 977 | case _AIO_OP_OPEN: |
bf8fe701 | 978 | debugs(43, 5, "OPEN of " << request->path << " to FD " << request->ret); |
62e76326 | 979 | break; |
980 | ||
cd748f27 | 981 | case _AIO_OP_READ: |
bf8fe701 | 982 | debugs(43, 5, "READ on fd: " << request->fd); |
62e76326 | 983 | break; |
984 | ||
cd748f27 | 985 | case _AIO_OP_WRITE: |
bf8fe701 | 986 | debugs(43, 5, "WRITE on fd: " << request->fd); |
62e76326 | 987 | break; |
988 | ||
cd748f27 | 989 | case _AIO_OP_CLOSE: |
bf8fe701 | 990 | debugs(43, 5, "CLOSE of fd: " << request->fd); |
62e76326 | 991 | break; |
992 | ||
cd748f27 | 993 | case _AIO_OP_UNLINK: |
bf8fe701 | 994 | debugs(43, 5, "UNLINK of " << request->path); |
62e76326 | 995 | break; |
996 | ||
cd748f27 | 997 | default: |
62e76326 | 998 | break; |
cd748f27 | 999 | } |
1000 | } | |
b0465494 | 1001 | |
1002 | void | |
1003 | squidaio_stats(StoreEntry * sentry) | |
1004 | { | |
1005 | squidaio_thread_t *threadp; | |
1006 | int i; | |
1007 | ||
1008 | if (!squidaio_initialised) | |
1009 | return; | |
1010 | ||
1011 | storeAppendPrintf(sentry, "\n\nThreads Status:\n"); | |
1012 | ||
1013 | storeAppendPrintf(sentry, "#\tID\t# Requests\n"); | |
1014 | ||
1015 | threadp = threads; | |
1016 | ||
cb4185f1 | 1017 | for (i = 0; i < NUMTHREADS; ++i) { |
691aef5a | 1018 | storeAppendPrintf(sentry, "%i\t0x%lx\t%ld\n", i + 1, (unsigned long)threadp->thread, threadp->requests); |
b0465494 | 1019 | threadp = threadp->next; |
1020 | } | |
1021 | } |