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Re-seed random generator when a file is reset
[fio.git] / backend.c
CommitLineData
2e1df07d
JA		 1/*
2 * fio - the flexible io tester
3 *
4 * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
5 * Copyright (C) 2006-2012 Jens Axboe <axboe@kernel.dk>
6 *
7 * The license below covers all files distributed with fio unless otherwise
8 * noted in the file itself.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24#include <unistd.h>
25#include <fcntl.h>
26#include <string.h>
27#include <limits.h>
28#include <signal.h>
29#include <time.h>
30#include <locale.h>
31#include <assert.h>
32#include <time.h>
e43606c2 33#include <inttypes.h>
2e1df07d
JA		 34#include <sys/stat.h>
35#include <sys/wait.h>
36#include <sys/ipc.h>
ec5c6b12 37#ifndef FIO_NO_HAVE_SHM_H
2e1df07d 38#include <sys/shm.h>
ec5c6b12 39#endif
2e1df07d
JA		 40#include <sys/mman.h>
41
42#include "fio.h"
43#include "hash.h"
44#include "smalloc.h"
45#include "verify.h"
46#include "trim.h"
47#include "diskutil.h"
48#include "cgroup.h"
49#include "profile.h"
50#include "lib/rand.h"
51#include "memalign.h"
52#include "server.h"
53
54static pthread_t disk_util_thread;
9ec7779f 55static struct fio_mutex *disk_thread_mutex;
2e1df07d
JA		 56static struct fio_mutex *startup_mutex;
57static struct fio_mutex *writeout_mutex;
58static struct flist_head *cgroup_list;
59static char *cgroup_mnt;
60static int exit_value;
61static volatile int fio_abort;
62
6eaf09d6 63struct io_log *agg_io_log[DDIR_RWDIR_CNT];
2e1df07d 64
a3efc919
JA		 65int groupid = 0;
66unsigned int thread_number = 0;
108fea77 67unsigned int stat_number = 0;
a3efc919
JA		 68unsigned int nr_process = 0;
69unsigned int nr_thread = 0;
70int shm_id = 0;
71int temp_stall_ts;
72unsigned long done_secs = 0;
27357187 73volatile int disk_util_exit = 0;
a3efc919 74
2e1df07d 75#define PAGE_ALIGN(buf) \
e43606c2 76 (char *) (((uintptr_t) (buf) + page_mask) & ~page_mask)
2e1df07d
JA		 77
78#define JOB_START_TIMEOUT (5 * 1000)
79
80static void sig_int(int sig)
81{
82 if (threads) {
83 if (is_backend)
84 fio_server_got_signal(sig);
85 else {
86 log_info("\nfio: terminating on signal %d\n", sig);
87 fflush(stdout);
88 exit_value = 128;
89 }
90
91 fio_terminate_threads(TERMINATE_ALL);
92 }
93}
94
4c6d91e8
JA		 95static void sig_show_status(int sig)
96{
97 show_running_run_stats();
98}
99
2e1df07d
JA		 100static void set_sig_handlers(void)
101{
102 struct sigaction act;
103
104 memset(&act, 0, sizeof(act));
105 act.sa_handler = sig_int;
106 act.sa_flags = SA_RESTART;
107 sigaction(SIGINT, &act, NULL);
108
109 memset(&act, 0, sizeof(act));
110 act.sa_handler = sig_int;
111 act.sa_flags = SA_RESTART;
112 sigaction(SIGTERM, &act, NULL);
113
2f694507
BC		 114/* Windows uses SIGBREAK as a quit signal from other applications */
115#ifdef WIN32
116 memset(&act, 0, sizeof(act));
117 act.sa_handler = sig_int;
118 act.sa_flags = SA_RESTART;
119 sigaction(SIGBREAK, &act, NULL);
120#endif
121
4c6d91e8
JA		 122 memset(&act, 0, sizeof(act));
123 act.sa_handler = sig_show_status;
124 act.sa_flags = SA_RESTART;
125 sigaction(SIGUSR1, &act, NULL);
126
2e1df07d
JA		 127 if (is_backend) {
128 memset(&act, 0, sizeof(act));
129 act.sa_handler = sig_int;
130 act.sa_flags = SA_RESTART;
131 sigaction(SIGPIPE, &act, NULL);
132 }
133}
134
135/*
136 * Check if we are above the minimum rate given.
137 */
138static int __check_min_rate(struct thread_data *td, struct timeval *now,
139 enum fio_ddir ddir)
140{
141 unsigned long long bytes = 0;
142 unsigned long iops = 0;
143 unsigned long spent;
144 unsigned long rate;
145 unsigned int ratemin = 0;
146 unsigned int rate_iops = 0;
147 unsigned int rate_iops_min = 0;
148
149 assert(ddir_rw(ddir));
150
151 if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
152 return 0;
153
154 /*
155 * allow a 2 second settle period in the beginning
156 */
157 if (mtime_since(&td->start, now) < 2000)
158 return 0;
159
160 iops += td->this_io_blocks[ddir];
161 bytes += td->this_io_bytes[ddir];
162 ratemin += td->o.ratemin[ddir];
163 rate_iops += td->o.rate_iops[ddir];
164 rate_iops_min += td->o.rate_iops_min[ddir];
165
166 /*
167 * if rate blocks is set, sample is running
168 */
169 if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
170 spent = mtime_since(&td->lastrate[ddir], now);
171 if (spent < td->o.ratecycle)
172 return 0;
173
174 if (td->o.rate[ddir]) {
175 /*
176 * check bandwidth specified rate
177 */
178 if (bytes < td->rate_bytes[ddir]) {
179 log_err("%s: min rate %u not met\n", td->o.name,
180 ratemin);
181 return 1;
182 } else {
183 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
184 if (rate < ratemin ||
185 bytes < td->rate_bytes[ddir]) {
186 log_err("%s: min rate %u not met, got"
187 " %luKB/sec\n", td->o.name,
188 ratemin, rate);
189 return 1;
190 }
191 }
192 } else {
193 /*
194 * checks iops specified rate
195 */
196 if (iops < rate_iops) {
197 log_err("%s: min iops rate %u not met\n",
198 td->o.name, rate_iops);
199 return 1;
200 } else {
201 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
202 if (rate < rate_iops_min ||
203 iops < td->rate_blocks[ddir]) {
204 log_err("%s: min iops rate %u not met,"
205 " got %lu\n", td->o.name,
206 rate_iops_min, rate);
207 }
208 }
209 }
210 }
211
212 td->rate_bytes[ddir] = bytes;
213 td->rate_blocks[ddir] = iops;
214 memcpy(&td->lastrate[ddir], now, sizeof(*now));
215 return 0;
216}
217
218static int check_min_rate(struct thread_data *td, struct timeval *now,
219 unsigned long *bytes_done)
220{
221 int ret = 0;
222
6eaf09d6
SL		 223 if (bytes_done[DDIR_READ])
224 ret |= __check_min_rate(td, now, DDIR_READ);
225 if (bytes_done[DDIR_WRITE])
226 ret |= __check_min_rate(td, now, DDIR_WRITE);
227 if (bytes_done[DDIR_TRIM])
228 ret |= __check_min_rate(td, now, DDIR_TRIM);
2e1df07d
JA		 229
230 return ret;
231}
232
233/*
234 * When job exits, we can cancel the in-flight IO if we are using async
235 * io. Attempt to do so.
236 */
237static void cleanup_pending_aio(struct thread_data *td)
238{
239 struct flist_head *entry, *n;
240 struct io_u *io_u;
241 int r;
242
243 /*
244 * get immediately available events, if any
245 */
246 r = io_u_queued_complete(td, 0, NULL);
247 if (r < 0)
248 return;
249
250 /*
251 * now cancel remaining active events
252 */
253 if (td->io_ops->cancel) {
254 flist_for_each_safe(entry, n, &td->io_u_busylist) {
255 io_u = flist_entry(entry, struct io_u, list);
256
257 /*
258 * if the io_u isn't in flight, then that generally
259 * means someone leaked an io_u. complain but fix
260 * it up, so we don't stall here.
261 */
262 if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
263 log_err("fio: non-busy IO on busy list\n");
264 put_io_u(td, io_u);
265 } else {
266 r = td->io_ops->cancel(td, io_u);
267 if (!r)
268 put_io_u(td, io_u);
269 }
270 }
271 }
272
273 if (td->cur_depth)
274 r = io_u_queued_complete(td, td->cur_depth, NULL);
275}
276
277/*
278 * Helper to handle the final sync of a file. Works just like the normal
279 * io path, just does everything sync.
280 */
281static int fio_io_sync(struct thread_data *td, struct fio_file *f)
282{
283 struct io_u *io_u = __get_io_u(td);
284 int ret;
285
286 if (!io_u)
287 return 1;
288
289 io_u->ddir = DDIR_SYNC;
290 io_u->file = f;
291
292 if (td_io_prep(td, io_u)) {
293 put_io_u(td, io_u);
294 return 1;
295 }
296
297requeue:
298 ret = td_io_queue(td, io_u);
299 if (ret < 0) {
300 td_verror(td, io_u->error, "td_io_queue");
301 put_io_u(td, io_u);
302 return 1;
303 } else if (ret == FIO_Q_QUEUED) {
304 if (io_u_queued_complete(td, 1, NULL) < 0)
305 return 1;
306 } else if (ret == FIO_Q_COMPLETED) {
307 if (io_u->error) {
308 td_verror(td, io_u->error, "td_io_queue");
309 return 1;
310 }
311
312 if (io_u_sync_complete(td, io_u, NULL) < 0)
313 return 1;
314 } else if (ret == FIO_Q_BUSY) {
315 if (td_io_commit(td))
316 return 1;
317 goto requeue;
318 }
319
320 return 0;
321}
a3efc919 322
2e1df07d
JA		 323static inline void __update_tv_cache(struct thread_data *td)
324{
325 fio_gettime(&td->tv_cache, NULL);
326}
327
328static inline void update_tv_cache(struct thread_data *td)
329{
330 if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
331 __update_tv_cache(td);
332}
333
334static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
335{
336 if (in_ramp_time(td))
337 return 0;
338 if (!td->o.timeout)
339 return 0;
340 if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
341 return 1;
342
343 return 0;
344}
345
346static int break_on_this_error(struct thread_data *td, enum fio_ddir ddir,
347 int *retptr)
348{
349 int ret = *retptr;
350
351 if (ret < 0 || td->error) {
8b28bd41
DM		 352 int err = td->error;
353 enum error_type_bit eb;
2e1df07d
JA		 354
355 if (ret < 0)
356 err = -ret;
2e1df07d 357
8b28bd41
DM		 358 eb = td_error_type(ddir, err);
359 if (!(td->o.continue_on_error & (1 << eb)))
2e1df07d
JA		 360 return 1;
361
8b28bd41 362 if (td_non_fatal_error(td, eb, err)) {
2e1df07d
JA		 363 /*
364 * Continue with the I/Os in case of
365 * a non fatal error.
366 */
367 update_error_count(td, err);
368 td_clear_error(td);
369 *retptr = 0;
370 return 0;
371 } else if (td->o.fill_device && err == ENOSPC) {
372 /*
373 * We expect to hit this error if
374 * fill_device option is set.
375 */
376 td_clear_error(td);
377 td->terminate = 1;
378 return 1;
379 } else {
380 /*
381 * Stop the I/O in case of a fatal
382 * error.
383 */
384 update_error_count(td, err);
385 return 1;
386 }
387 }
388
389 return 0;
390}
391
2e1df07d
JA		 392/*
393 * The main verify engine. Runs over the writes we previously submitted,
394 * reads the blocks back in, and checks the crc/md5 of the data.
395 */
396static void do_verify(struct thread_data *td)
397{
398 struct fio_file *f;
399 struct io_u *io_u;
400 int ret, min_events;
401 unsigned int i;
402
403 dprint(FD_VERIFY, "starting loop\n");
404
405 /*
406 * sync io first and invalidate cache, to make sure we really
407 * read from disk.
408 */
409 for_each_file(td, f, i) {
410 if (!fio_file_open(f))
411 continue;
412 if (fio_io_sync(td, f))
413 break;
414 if (file_invalidate_cache(td, f))
415 break;
416 }
417
418 if (td->error)
419 return;
420
421 td_set_runstate(td, TD_VERIFYING);
422
423 io_u = NULL;
424 while (!td->terminate) {
fbccf46c 425 enum fio_ddir ddir;
2e1df07d
JA		 426 int ret2, full;
427
428 update_tv_cache(td);
429
430 if (runtime_exceeded(td, &td->tv_cache)) {
431 __update_tv_cache(td);
432 if (runtime_exceeded(td, &td->tv_cache)) {
433 td->terminate = 1;
434 break;
435 }
436 }
437
9e684a49
DE		 438 if (flow_threshold_exceeded(td))
439 continue;
440
2e1df07d
JA		 441 io_u = __get_io_u(td);
442 if (!io_u)
443 break;
444
445 if (get_next_verify(td, io_u)) {
446 put_io_u(td, io_u);
447 break;
448 }
449
450 if (td_io_prep(td, io_u)) {
451 put_io_u(td, io_u);
452 break;
453 }
454
455 if (td->o.verify_async)
456 io_u->end_io = verify_io_u_async;
457 else
458 io_u->end_io = verify_io_u;
459
fbccf46c
JA		 460 ddir = io_u->ddir;
461
2e1df07d
JA		 462 ret = td_io_queue(td, io_u);
463 switch (ret) {
464 case FIO_Q_COMPLETED:
465 if (io_u->error) {
466 ret = -io_u->error;
467 clear_io_u(td, io_u);
468 } else if (io_u->resid) {
469 int bytes = io_u->xfer_buflen - io_u->resid;
470
471 /*
472 * zero read, fail
473 */
474 if (!bytes) {
475 td_verror(td, EIO, "full resid");
476 put_io_u(td, io_u);
477 break;
478 }
479
480 io_u->xfer_buflen = io_u->resid;
481 io_u->xfer_buf += bytes;
482 io_u->offset += bytes;
483
484 if (ddir_rw(io_u->ddir))
485 td->ts.short_io_u[io_u->ddir]++;
486
487 f = io_u->file;
488 if (io_u->offset == f->real_file_size)
489 goto sync_done;
490
491 requeue_io_u(td, &io_u);
492 } else {
493sync_done:
494 ret = io_u_sync_complete(td, io_u, NULL);
495 if (ret < 0)
496 break;
497 }
498 continue;
499 case FIO_Q_QUEUED:
500 break;
501 case FIO_Q_BUSY:
502 requeue_io_u(td, &io_u);
503 ret2 = td_io_commit(td);
504 if (ret2 < 0)
505 ret = ret2;
506 break;
507 default:
508 assert(ret < 0);
509 td_verror(td, -ret, "td_io_queue");
510 break;
511 }
512
fbccf46c 513 if (break_on_this_error(td, ddir, &ret))
2e1df07d
JA		 514 break;
515
516 /*
517 * if we can queue more, do so. but check if there are
518 * completed io_u's first. Note that we can get BUSY even
519 * without IO queued, if the system is resource starved.
520 */
521 full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
522 if (full || !td->o.iodepth_batch_complete) {
523 min_events = min(td->o.iodepth_batch_complete,
524 td->cur_depth);
8a74b56d
JA		 525 /*
526 * if the queue is full, we MUST reap at least 1 event
527 */
528 if (full && !min_events)
2e1df07d
JA		 529 min_events = 1;
530
531 do {
532 /*
533 * Reap required number of io units, if any,
534 * and do the verification on them through
535 * the callback handler
536 */
537 if (io_u_queued_complete(td, min_events, NULL) < 0) {
538 ret = -1;
539 break;
540 }
541 } while (full && (td->cur_depth > td->o.iodepth_low));
542 }
543 if (ret < 0)
544 break;
545 }
546
547 if (!td->error) {
548 min_events = td->cur_depth;
549
550 if (min_events)
551 ret = io_u_queued_complete(td, min_events, NULL);
552 } else
553 cleanup_pending_aio(td);
554
555 td_set_runstate(td, TD_RUNNING);
556
557 dprint(FD_VERIFY, "exiting loop\n");
558}
559
f7078f7b
JA		 560static int io_bytes_exceeded(struct thread_data *td)
561{
562 unsigned long long bytes;
563
564 if (td_rw(td))
6eaf09d6 565 bytes = td->this_io_bytes[DDIR_READ] + td->this_io_bytes[DDIR_WRITE];
f7078f7b 566 else if (td_write(td))
6eaf09d6
SL		 567 bytes = td->this_io_bytes[DDIR_WRITE];
568 else if (td_read(td))
569 bytes = td->this_io_bytes[DDIR_READ];
f7078f7b 570 else
6eaf09d6 571 bytes = td->this_io_bytes[DDIR_TRIM];
f7078f7b
JA		 572
573 return bytes >= td->o.size;
574}
575
2e1df07d
JA		 576/*
577 * Main IO worker function. It retrieves io_u's to process and queues
578 * and reaps them, checking for rate and errors along the way.
579 */
580static void do_io(struct thread_data *td)
581{
582 unsigned int i;
583 int ret = 0;
584
585 if (in_ramp_time(td))
586 td_set_runstate(td, TD_RAMP);
587 else
588 td_set_runstate(td, TD_RUNNING);
589
f7078f7b 590 while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
c04e4661
DE		 591 (!flist_empty(&td->trim_list)) || !io_bytes_exceeded(td) ||
592 td->o.time_based) {
2e1df07d 593 struct timeval comp_time;
6eaf09d6 594 unsigned long bytes_done[DDIR_RWDIR_CNT] = { 0, 0, 0 };
2e1df07d
JA		 595 int min_evts = 0;
596 struct io_u *io_u;
597 int ret2, full;
598 enum fio_ddir ddir;
599
7d7803fa 600 if (td->terminate || td->done)
2e1df07d
JA		 601 break;
602
603 update_tv_cache(td);
604
605 if (runtime_exceeded(td, &td->tv_cache)) {
606 __update_tv_cache(td);
607 if (runtime_exceeded(td, &td->tv_cache)) {
608 td->terminate = 1;
609 break;
610 }
611 }
612
9e684a49
DE		 613 if (flow_threshold_exceeded(td))
614 continue;
615
2e1df07d
JA		 616 io_u = get_io_u(td);
617 if (!io_u)
618 break;
619
620 ddir = io_u->ddir;
621
622 /*
82af2a7c
JA		 623 * Add verification end_io handler if:
624 * - Asked to verify (!td_rw(td))
625 * - Or the io_u is from our verify list (mixed write/ver)
2e1df07d
JA		 626 */
627 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
82af2a7c 628 ((io_u->flags & IO_U_F_VER_LIST) || !td_rw(td))) {
2e1df07d
JA		 629 if (td->o.verify_async)
630 io_u->end_io = verify_io_u_async;
631 else
632 io_u->end_io = verify_io_u;
633 td_set_runstate(td, TD_VERIFYING);
634 } else if (in_ramp_time(td))
635 td_set_runstate(td, TD_RAMP);
636 else
637 td_set_runstate(td, TD_RUNNING);
638
639 ret = td_io_queue(td, io_u);
640 switch (ret) {
641 case FIO_Q_COMPLETED:
642 if (io_u->error) {
643 ret = -io_u->error;
644 clear_io_u(td, io_u);
645 } else if (io_u->resid) {
646 int bytes = io_u->xfer_buflen - io_u->resid;
647 struct fio_file *f = io_u->file;
648
649 /*
650 * zero read, fail
651 */
652 if (!bytes) {
653 td_verror(td, EIO, "full resid");
654 put_io_u(td, io_u);
655 break;
656 }
657
658 io_u->xfer_buflen = io_u->resid;
659 io_u->xfer_buf += bytes;
660 io_u->offset += bytes;
661
662 if (ddir_rw(io_u->ddir))
663 td->ts.short_io_u[io_u->ddir]++;
664
665 if (io_u->offset == f->real_file_size)
666 goto sync_done;
667
668 requeue_io_u(td, &io_u);
669 } else {
670sync_done:
6eaf09d6
SL		 671 if (__should_check_rate(td, DDIR_READ) ||
672 __should_check_rate(td, DDIR_WRITE) ||
673 __should_check_rate(td, DDIR_TRIM))
2e1df07d
JA		 674 fio_gettime(&comp_time, NULL);
675
676 ret = io_u_sync_complete(td, io_u, bytes_done);
677 if (ret < 0)
678 break;
679 }
680 break;
681 case FIO_Q_QUEUED:
682 /*
683 * if the engine doesn't have a commit hook,
684 * the io_u is really queued. if it does have such
685 * a hook, it has to call io_u_queued() itself.
686 */
687 if (td->io_ops->commit == NULL)
688 io_u_queued(td, io_u);
689 break;
690 case FIO_Q_BUSY:
691 requeue_io_u(td, &io_u);
692 ret2 = td_io_commit(td);
693 if (ret2 < 0)
694 ret = ret2;
695 break;
696 default:
697 assert(ret < 0);
698 put_io_u(td, io_u);
699 break;
700 }
701
702 if (break_on_this_error(td, ddir, &ret))
703 break;
704
705 /*
706 * See if we need to complete some commands. Note that we
707 * can get BUSY even without IO queued, if the system is
708 * resource starved.
709 */
710 full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
711 if (full || !td->o.iodepth_batch_complete) {
712 min_evts = min(td->o.iodepth_batch_complete,
713 td->cur_depth);
8a74b56d
JA		 714 /*
715 * if the queue is full, we MUST reap at least 1 event
716 */
717 if (full && !min_evts)
2e1df07d
JA		 718 min_evts = 1;
719
6eaf09d6
SL		 720 if (__should_check_rate(td, DDIR_READ) ||
721 __should_check_rate(td, DDIR_WRITE) ||
722 __should_check_rate(td, DDIR_TRIM))
2e1df07d
JA		 723 fio_gettime(&comp_time, NULL);
724
725 do {
726 ret = io_u_queued_complete(td, min_evts, bytes_done);
727 if (ret < 0)
728 break;
729
730 } while (full && (td->cur_depth > td->o.iodepth_low));
731 }
732
733 if (ret < 0)
734 break;
d5abee06 735 if (!ddir_rw_sum(bytes_done) && !(td->io_ops->flags & FIO_NOIO))
2e1df07d
JA		 736 continue;
737
738 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
739 if (check_min_rate(td, &comp_time, bytes_done)) {
740 if (exitall_on_terminate)
741 fio_terminate_threads(td->groupid);
742 td_verror(td, EIO, "check_min_rate");
743 break;
744 }
745 }
746
747 if (td->o.thinktime) {
748 unsigned long long b;
749
342f4be4 750 b = ddir_rw_sum(td->io_blocks);
2e1df07d
JA		 751 if (!(b % td->o.thinktime_blocks)) {
752 int left;
753
754 if (td->o.thinktime_spin)
755 usec_spin(td->o.thinktime_spin);
756
757 left = td->o.thinktime - td->o.thinktime_spin;
758 if (left)
759 usec_sleep(td, left);
760 }
761 }
762 }
763
764 if (td->trim_entries)
765 log_err("fio: %d trim entries leaked?\n", td->trim_entries);
766
767 if (td->o.fill_device && td->error == ENOSPC) {
768 td->error = 0;
769 td->terminate = 1;
770 }
771 if (!td->error) {
772 struct fio_file *f;
773
774 i = td->cur_depth;
775 if (i) {
776 ret = io_u_queued_complete(td, i, NULL);
777 if (td->o.fill_device && td->error == ENOSPC)
778 td->error = 0;
779 }
780
781 if (should_fsync(td) && td->o.end_fsync) {
782 td_set_runstate(td, TD_FSYNCING);
783
784 for_each_file(td, f, i) {
785 if (!fio_file_open(f))
786 continue;
787 fio_io_sync(td, f);
788 }
789 }
790 } else
791 cleanup_pending_aio(td);
792
793 /*
794 * stop job if we failed doing any IO
795 */
342f4be4 796 if (!ddir_rw_sum(td->this_io_bytes))
2e1df07d
JA		 797 td->done = 1;
798}
799
800static void cleanup_io_u(struct thread_data *td)
801{
802 struct flist_head *entry, *n;
803 struct io_u *io_u;
804
805 flist_for_each_safe(entry, n, &td->io_u_freelist) {
806 io_u = flist_entry(entry, struct io_u, list);
807
808 flist_del(&io_u->list);
c73ed246
JA		 809
810 if (td->io_ops->io_u_free)
811 td->io_ops->io_u_free(td, io_u);
812
2e1df07d
JA		 813 fio_memfree(io_u, sizeof(*io_u));
814 }
815
816 free_io_mem(td);
817}
818
819static int init_io_u(struct thread_data *td)
820{
821 struct io_u *io_u;
9c42684e 822 unsigned int max_bs, min_write;
2e1df07d 823 int cl_align, i, max_units;
59d8d0f5 824 int data_xfer = 1;
2e1df07d
JA		 825 char *p;
826
827 max_units = td->o.iodepth;
828 max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
6eaf09d6 829 max_bs = max(td->o.max_bs[DDIR_TRIM], max_bs);
9c42684e 830 min_write = td->o.min_bs[DDIR_WRITE];
2e1df07d
JA		 831 td->orig_buffer_size = (unsigned long long) max_bs
832 * (unsigned long long) max_units;
833
88045e04 834 if ((td->io_ops->flags & FIO_NOIO) || !(td_read(td) || td_write(td)))
59d8d0f5
JA		 835 data_xfer = 0;
836
2e1df07d
JA		 837 if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
838 unsigned long bs;
839
840 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
841 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
842 }
843
844 if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
845 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
846 return 1;
847 }
848
59d8d0f5 849 if (data_xfer && allocate_io_mem(td))
2e1df07d
JA		 850 return 1;
851
852 if (td->o.odirect || td->o.mem_align ||
853 (td->io_ops->flags & FIO_RAWIO))
854 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
855 else
856 p = td->orig_buffer;
857
858 cl_align = os_cache_line_size();
859
860 for (i = 0; i < max_units; i++) {
861 void *ptr;
862
863 if (td->terminate)
864 return 1;
865
866 ptr = fio_memalign(cl_align, sizeof(*io_u));
867 if (!ptr) {
868 log_err("fio: unable to allocate aligned memory\n");
869 break;
870 }
871
872 io_u = ptr;
873 memset(io_u, 0, sizeof(*io_u));
874 INIT_FLIST_HEAD(&io_u->list);
875 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
876
59d8d0f5 877 if (data_xfer) {
2e1df07d
JA		 878 io_u->buf = p;
879 dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
880
881 if (td_write(td))
9c42684e 882 io_u_fill_buffer(td, io_u, min_write, max_bs);
2e1df07d
JA		 883 if (td_write(td) && td->o.verify_pattern_bytes) {
884 /*
885 * Fill the buffer with the pattern if we are
886 * going to be doing writes.
887 */
888 fill_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
889 }
890 }
891
892 io_u->index = i;
893 io_u->flags = IO_U_F_FREE;
894 flist_add(&io_u->list, &td->io_u_freelist);
c73ed246
JA		 895
896 if (td->io_ops->io_u_init) {
897 int ret = td->io_ops->io_u_init(td, io_u);
898
899 if (ret) {
900 log_err("fio: failed to init engine data: %d\n", ret);
901 return 1;
902 }
903 }
904
2e1df07d
JA		 905 p += max_bs;
906 }
907
908 return 0;
909}
910
911static int switch_ioscheduler(struct thread_data *td)
912{
913 char tmp[256], tmp2[128];
914 FILE *f;
915 int ret;
916
917 if (td->io_ops->flags & FIO_DISKLESSIO)
918 return 0;
919
920 sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
921
922 f = fopen(tmp, "r+");
923 if (!f) {
924 if (errno == ENOENT) {
925 log_err("fio: os or kernel doesn't support IO scheduler"
926 " switching\n");
927 return 0;
928 }
929 td_verror(td, errno, "fopen iosched");
930 return 1;
931 }
932
933 /*
934 * Set io scheduler.
935 */
936 ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
937 if (ferror(f) || ret != 1) {
938 td_verror(td, errno, "fwrite");
939 fclose(f);
940 return 1;
941 }
942
943 rewind(f);
944
945 /*
946 * Read back and check that the selected scheduler is now the default.
947 */
948 ret = fread(tmp, 1, sizeof(tmp), f);
949 if (ferror(f) || ret < 0) {
950 td_verror(td, errno, "fread");
951 fclose(f);
952 return 1;
953 }
954
955 sprintf(tmp2, "[%s]", td->o.ioscheduler);
956 if (!strstr(tmp, tmp2)) {
957 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
958 td_verror(td, EINVAL, "iosched_switch");
959 fclose(f);
960 return 1;
961 }
962
963 fclose(f);
964 return 0;
965}
966
967static int keep_running(struct thread_data *td)
968{
2e1df07d
JA		 969 if (td->done)
970 return 0;
971 if (td->o.time_based)
972 return 1;
973 if (td->o.loops) {
974 td->o.loops--;
975 return 1;
976 }
977
342f4be4 978 if (ddir_rw_sum(td->io_bytes) < td->o.size)
2e1df07d
JA		 979 return 1;
980
981 return 0;
982}
983
984static int exec_string(const char *string)
985{
986 int ret, newlen = strlen(string) + 1 + 8;
987 char *str;
988
989 str = malloc(newlen);
990 sprintf(str, "sh -c %s", string);
991
992 ret = system(str);
993 if (ret == -1)
994 log_err("fio: exec of cmd <%s> failed\n", str);
995
996 free(str);
997 return ret;
998}
999
1000/*
1001 * Entry point for the thread based jobs. The process based jobs end up
1002 * here as well, after a little setup.
1003 */
1004static void *thread_main(void *data)
1005{
1006 unsigned long long elapsed;
1007 struct thread_data *td = data;
1008 pthread_condattr_t attr;
1009 int clear_state;
1010
1011 if (!td->o.use_thread) {
1012 setsid();
1013 td->pid = getpid();
1014 } else
1015 td->pid = gettid();
1016
5d879392
JA		 1017 fio_local_clock_init(td->o.use_thread);
1018
2e1df07d
JA		 1019 dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1020
1021 INIT_FLIST_HEAD(&td->io_u_freelist);
1022 INIT_FLIST_HEAD(&td->io_u_busylist);
1023 INIT_FLIST_HEAD(&td->io_u_requeues);
1024 INIT_FLIST_HEAD(&td->io_log_list);
1025 INIT_FLIST_HEAD(&td->io_hist_list);
1026 INIT_FLIST_HEAD(&td->verify_list);
1027 INIT_FLIST_HEAD(&td->trim_list);
1ae83d45 1028 INIT_FLIST_HEAD(&td->next_rand_list);
2e1df07d
JA		 1029 pthread_mutex_init(&td->io_u_lock, NULL);
1030 td->io_hist_tree = RB_ROOT;
1031
1032 pthread_condattr_init(&attr);
1033 pthread_cond_init(&td->verify_cond, &attr);
1034 pthread_cond_init(&td->free_cond, &attr);
1035
1036 td_set_runstate(td, TD_INITIALIZED);
1037 dprint(FD_MUTEX, "up startup_mutex\n");
1038 fio_mutex_up(startup_mutex);
1039 dprint(FD_MUTEX, "wait on td->mutex\n");
1040 fio_mutex_down(td->mutex);
1041 dprint(FD_MUTEX, "done waiting on td->mutex\n");
1042
1043 /*
1044 * the ->mutex mutex is now no longer used, close it to avoid
1045 * eating a file descriptor
1046 */
1047 fio_mutex_remove(td->mutex);
1048
1049 /*
1050 * A new gid requires privilege, so we need to do this before setting
1051 * the uid.
1052 */
1053 if (td->o.gid != -1U && setgid(td->o.gid)) {
1054 td_verror(td, errno, "setgid");
1055 goto err;
1056 }
1057 if (td->o.uid != -1U && setuid(td->o.uid)) {
1058 td_verror(td, errno, "setuid");
1059 goto err;
1060 }
1061
1062 /*
1063 * If we have a gettimeofday() thread, make sure we exclude that
1064 * thread from this job
1065 */
1066 if (td->o.gtod_cpu)
1067 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
1068
1069 /*
1070 * Set affinity first, in case it has an impact on the memory
1071 * allocations.
1072 */
1073 if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1074 td_verror(td, errno, "cpu_set_affinity");
1075 goto err;
1076 }
1077
67bf9823 1078#ifdef CONFIG_LIBNUMA
d0b937ed
YR		 1079 /* numa node setup */
1080 if (td->o.numa_cpumask_set || td->o.numa_memmask_set) {
1081 int ret;
1082
1083 if (numa_available() < 0) {
1084 td_verror(td, errno, "Does not support NUMA API\n");
1085 goto err;
1086 }
1087
1088 if (td->o.numa_cpumask_set) {
1089 ret = numa_run_on_node_mask(td->o.numa_cpunodesmask);
1090 if (ret == -1) {
1091 td_verror(td, errno, \
1092 "numa_run_on_node_mask failed\n");
1093 goto err;
1094 }
1095 }
1096
1097 if (td->o.numa_memmask_set) {
1098
1099 switch (td->o.numa_mem_mode) {
1100 case MPOL_INTERLEAVE:
1101 numa_set_interleave_mask(td->o.numa_memnodesmask);
1102 break;
1103 case MPOL_BIND:
1104 numa_set_membind(td->o.numa_memnodesmask);
1105 break;
1106 case MPOL_LOCAL:
1107 numa_set_localalloc();
1108 break;
1109 case MPOL_PREFERRED:
1110 numa_set_preferred(td->o.numa_mem_prefer_node);
1111 break;
1112 case MPOL_DEFAULT:
1113 default:
1114 break;
1115 }
1116
1117 }
1118 }
1119#endif
1120
2e1df07d
JA		 1121 /*
1122 * May alter parameters that init_io_u() will use, so we need to
1123 * do this first.
1124 */
1125 if (init_iolog(td))
1126 goto err;
1127
1128 if (init_io_u(td))
1129 goto err;
1130
1131 if (td->o.verify_async && verify_async_init(td))
1132 goto err;
1133
1134 if (td->ioprio_set) {
1135 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1136 td_verror(td, errno, "ioprio_set");
1137 goto err;
1138 }
1139 }
1140
5d89ff79 1141 if (td->o.cgroup && cgroup_setup(td, cgroup_list, &cgroup_mnt))
2e1df07d
JA		 1142 goto err;
1143
649c10c5
BC		 1144 errno = 0;
1145 if (nice(td->o.nice) == -1 && errno != 0) {
2e1df07d
JA		 1146 td_verror(td, errno, "nice");
1147 goto err;
1148 }
1149
1150 if (td->o.ioscheduler && switch_ioscheduler(td))
1151 goto err;
1152
1153 if (!td->o.create_serialize && setup_files(td))
1154 goto err;
1155
1156 if (td_io_init(td))
1157 goto err;
1158
1159 if (init_random_map(td))
1160 goto err;
1161
1162 if (td->o.exec_prerun) {
1163 if (exec_string(td->o.exec_prerun))
1164 goto err;
1165 }
1166
1167 if (td->o.pre_read) {
1168 if (pre_read_files(td) < 0)
1169 goto err;
1170 }
1171
1172 fio_gettime(&td->epoch, NULL);
1173 getrusage(RUSAGE_SELF, &td->ru_start);
1174
1175 clear_state = 0;
1176 while (keep_running(td)) {
1177 fio_gettime(&td->start, NULL);
1178 memcpy(&td->bw_sample_time, &td->start, sizeof(td->start));
1179 memcpy(&td->iops_sample_time, &td->start, sizeof(td->start));
1180 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1181
6eaf09d6
SL		 1182 if (td->o.ratemin[DDIR_READ] || td->o.ratemin[DDIR_WRITE] ||
1183 td->o.ratemin[DDIR_TRIM]) {
1184 memcpy(&td->lastrate[DDIR_READ], &td->bw_sample_time,
2e1df07d 1185 sizeof(td->bw_sample_time));
6eaf09d6
SL		 1186 memcpy(&td->lastrate[DDIR_WRITE], &td->bw_sample_time,
1187 sizeof(td->bw_sample_time));
1188 memcpy(&td->lastrate[DDIR_TRIM], &td->bw_sample_time,
2e1df07d
JA		 1189 sizeof(td->bw_sample_time));
1190 }
1191
1192 if (clear_state)
1193 clear_io_state(td);
1194
1195 prune_io_piece_log(td);
1196
1197 do_io(td);
1198
1199 clear_state = 1;
1200
1201 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1202 elapsed = utime_since_now(&td->start);
1203 td->ts.runtime[DDIR_READ] += elapsed;
1204 }
1205 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1206 elapsed = utime_since_now(&td->start);
1207 td->ts.runtime[DDIR_WRITE] += elapsed;
1208 }
6eaf09d6
SL		 1209 if (td_trim(td) && td->io_bytes[DDIR_TRIM]) {
1210 elapsed = utime_since_now(&td->start);
1211 td->ts.runtime[DDIR_TRIM] += elapsed;
1212 }
2e1df07d
JA		 1213
1214 if (td->error || td->terminate)
1215 break;
1216
1217 if (!td->o.do_verify ||
1218 td->o.verify == VERIFY_NONE ||
1219 (td->io_ops->flags & FIO_UNIDIR))
1220 continue;
1221
1222 clear_io_state(td);
1223
1224 fio_gettime(&td->start, NULL);
1225
1226 do_verify(td);
1227
1228 td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
1229
1230 if (td->error || td->terminate)
1231 break;
1232 }
1233
1234 update_rusage_stat(td);
6eaf09d6
SL		 1235 td->ts.runtime[DDIR_READ] = (td->ts.runtime[DDIR_READ] + 999) / 1000;
1236 td->ts.runtime[DDIR_WRITE] = (td->ts.runtime[DDIR_WRITE] + 999) / 1000;
1237 td->ts.runtime[DDIR_TRIM] = (td->ts.runtime[DDIR_TRIM] + 999) / 1000;
2e1df07d 1238 td->ts.total_run_time = mtime_since_now(&td->epoch);
6eaf09d6
SL		 1239 td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
1240 td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
1241 td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
2e1df07d
JA		 1242
1243 fio_mutex_down(writeout_mutex);
1244 if (td->bw_log) {
1245 if (td->o.bw_log_file) {
1246 finish_log_named(td, td->bw_log,
1247 td->o.bw_log_file, "bw");
1248 } else
1249 finish_log(td, td->bw_log, "bw");
1250 }
1251 if (td->lat_log) {
1252 if (td->o.lat_log_file) {
1253 finish_log_named(td, td->lat_log,
1254 td->o.lat_log_file, "lat");
1255 } else
1256 finish_log(td, td->lat_log, "lat");
1257 }
1258 if (td->slat_log) {
1259 if (td->o.lat_log_file) {
1260 finish_log_named(td, td->slat_log,
1261 td->o.lat_log_file, "slat");
1262 } else
1263 finish_log(td, td->slat_log, "slat");
1264 }
1265 if (td->clat_log) {
1266 if (td->o.lat_log_file) {
1267 finish_log_named(td, td->clat_log,
1268 td->o.lat_log_file, "clat");
1269 } else
1270 finish_log(td, td->clat_log, "clat");
1271 }
1272 if (td->iops_log) {
1273 if (td->o.iops_log_file) {
1274 finish_log_named(td, td->iops_log,
1275 td->o.iops_log_file, "iops");
1276 } else
1277 finish_log(td, td->iops_log, "iops");
1278 }
1279
1280 fio_mutex_up(writeout_mutex);
1281 if (td->o.exec_postrun)
1282 exec_string(td->o.exec_postrun);
1283
1284 if (exitall_on_terminate)
1285 fio_terminate_threads(td->groupid);
1286
1287err:
1288 if (td->error)
1289 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1290 td->verror);
1291
1292 if (td->o.verify_async)
1293 verify_async_exit(td);
1294
1295 close_and_free_files(td);
2e1df07d 1296 cleanup_io_u(td);
32dbca2c 1297 close_ioengine(td);
2e1df07d
JA		 1298 cgroup_shutdown(td, &cgroup_mnt);
1299
1300 if (td->o.cpumask_set) {
1301 int ret = fio_cpuset_exit(&td->o.cpumask);
1302
1303 td_verror(td, ret, "fio_cpuset_exit");
1304 }
1305
1306 /*
1307 * do this very late, it will log file closing as well
1308 */
1309 if (td->o.write_iolog_file)
1310 write_iolog_close(td);
1311
1312 td_set_runstate(td, TD_EXITED);
e43606c2 1313 return (void *) (uintptr_t) td->error;
2e1df07d
JA		 1314}
1315
1316
1317/*
1318 * We cannot pass the td data into a forked process, so attach the td and
1319 * pass it to the thread worker.
1320 */
1321static int fork_main(int shmid, int offset)
1322{
1323 struct thread_data *td;
1324 void *data, *ret;
1325
1326#ifndef __hpux
1327 data = shmat(shmid, NULL, 0);
1328 if (data == (void *) -1) {
1329 int __err = errno;
1330
1331 perror("shmat");
1332 return __err;
1333 }
1334#else
1335 /*
1336 * HP-UX inherits shm mappings?
1337 */
1338 data = threads;
1339#endif
1340
1341 td = data + offset * sizeof(struct thread_data);
1342 ret = thread_main(td);
1343 shmdt(data);
e43606c2 1344 return (int) (uintptr_t) ret;
2e1df07d
JA		 1345}
1346
1347/*
1348 * Run over the job map and reap the threads that have exited, if any.
1349 */
1350static void reap_threads(unsigned int *nr_running, unsigned int *t_rate,
1351 unsigned int *m_rate)
1352{
1353 struct thread_data *td;
1354 unsigned int cputhreads, realthreads, pending;
1355 int i, status, ret;
1356
1357 /*
1358 * reap exited threads (TD_EXITED -> TD_REAPED)
1359 */
1360 realthreads = pending = cputhreads = 0;
1361 for_each_td(td, i) {
1362 int flags = 0;
1363
1364 /*
1365 * ->io_ops is NULL for a thread that has closed its
1366 * io engine
1367 */
1368 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1369 cputhreads++;
1370 else
1371 realthreads++;
1372
1373 if (!td->pid) {
1374 pending++;
1375 continue;
1376 }
1377 if (td->runstate == TD_REAPED)
1378 continue;
1379 if (td->o.use_thread) {
1380 if (td->runstate == TD_EXITED) {
1381 td_set_runstate(td, TD_REAPED);
1382 goto reaped;
1383 }
1384 continue;
1385 }
1386
1387 flags = WNOHANG;
1388 if (td->runstate == TD_EXITED)
1389 flags = 0;
1390
1391 /*
1392 * check if someone quit or got killed in an unusual way
1393 */
1394 ret = waitpid(td->pid, &status, flags);
1395 if (ret < 0) {
1396 if (errno == ECHILD) {
1397 log_err("fio: pid=%d disappeared %d\n",
1398 (int) td->pid, td->runstate);
a5e371a6 1399 td->sig = ECHILD;
2e1df07d
JA		 1400 td_set_runstate(td, TD_REAPED);
1401 goto reaped;
1402 }
1403 perror("waitpid");
1404 } else if (ret == td->pid) {
1405 if (WIFSIGNALED(status)) {
1406 int sig = WTERMSIG(status);
1407
36d80bc7 1408 if (sig != SIGTERM && sig != SIGUSR2)
2e1df07d
JA		 1409 log_err("fio: pid=%d, got signal=%d\n",
1410 (int) td->pid, sig);
a5e371a6 1411 td->sig = sig;
2e1df07d
JA		 1412 td_set_runstate(td, TD_REAPED);
1413 goto reaped;
1414 }
1415 if (WIFEXITED(status)) {
1416 if (WEXITSTATUS(status) && !td->error)
1417 td->error = WEXITSTATUS(status);
1418
1419 td_set_runstate(td, TD_REAPED);
1420 goto reaped;
1421 }
1422 }
1423
1424 /*
1425 * thread is not dead, continue
1426 */
1427 pending++;
1428 continue;
1429reaped:
1430 (*nr_running)--;
342f4be4
JA		 1431 (*m_rate) -= ddir_rw_sum(td->o.ratemin);
1432 (*t_rate) -= ddir_rw_sum(td->o.rate);
2e1df07d
JA		 1433 if (!td->pid)
1434 pending--;
1435
1436 if (td->error)
1437 exit_value++;
1438
1439 done_secs += mtime_since_now(&td->epoch) / 1000;
1440 }
1441
1442 if (*nr_running == cputhreads && !pending && realthreads)
1443 fio_terminate_threads(TERMINATE_ALL);
1444}
1445
2e1df07d
JA		 1446/*
1447 * Main function for kicking off and reaping jobs, as needed.
1448 */
1449static void run_threads(void)
1450{
1451 struct thread_data *td;
1452 unsigned long spent;
1453 unsigned int i, todo, nr_running, m_rate, t_rate, nr_started;
1454
1455 if (fio_pin_memory())
1456 return;
1457
1458 if (fio_gtod_offload && fio_start_gtod_thread())
1459 return;
1460
1461 set_sig_handlers();
1462
f3afa57e 1463 if (output_format == FIO_OUTPUT_NORMAL) {
2e1df07d
JA		 1464 log_info("Starting ");
1465 if (nr_thread)
1466 log_info("%d thread%s", nr_thread,
1467 nr_thread > 1 ? "s" : "");
1468 if (nr_process) {
1469 if (nr_thread)
1470 log_info(" and ");
1471 log_info("%d process%s", nr_process,
1472 nr_process > 1 ? "es" : "");
1473 }
1474 log_info("\n");
1475 fflush(stdout);
1476 }
1477
1478 todo = thread_number;
1479 nr_running = 0;
1480 nr_started = 0;
1481 m_rate = t_rate = 0;
1482
1483 for_each_td(td, i) {
1484 print_status_init(td->thread_number - 1);
1485
1486 if (!td->o.create_serialize)
1487 continue;
1488
1489 /*
1490 * do file setup here so it happens sequentially,
1491 * we don't want X number of threads getting their
1492 * client data interspersed on disk
1493 */
1494 if (setup_files(td)) {
1495 exit_value++;
1496 if (td->error)
1497 log_err("fio: pid=%d, err=%d/%s\n",
1498 (int) td->pid, td->error, td->verror);
1499 td_set_runstate(td, TD_REAPED);
1500 todo--;
1501 } else {
1502 struct fio_file *f;
1503 unsigned int j;
1504
1505 /*
1506 * for sharing to work, each job must always open
1507 * its own files. so close them, if we opened them
1508 * for creation
1509 */
1510 for_each_file(td, f, j) {
1511 if (fio_file_open(f))
1512 td_io_close_file(td, f);
1513 }
1514 }
1515 }
1516
1517 set_genesis_time();
1518
1519 while (todo) {
1520 struct thread_data *map[REAL_MAX_JOBS];
1521 struct timeval this_start;
1522 int this_jobs = 0, left;
1523
1524 /*
1525 * create threads (TD_NOT_CREATED -> TD_CREATED)
1526 */
1527 for_each_td(td, i) {
1528 if (td->runstate != TD_NOT_CREATED)
1529 continue;
1530
1531 /*
1532 * never got a chance to start, killed by other
1533 * thread for some reason
1534 */
1535 if (td->terminate) {
1536 todo--;
1537 continue;
1538 }
1539
1540 if (td->o.start_delay) {
1541 spent = mtime_since_genesis();
1542
1543 if (td->o.start_delay * 1000 > spent)
1544 continue;
1545 }
1546
1547 if (td->o.stonewall && (nr_started || nr_running)) {
1548 dprint(FD_PROCESS, "%s: stonewall wait\n",
1549 td->o.name);
1550 break;
1551 }
1552
1553 init_disk_util(td);
1554
1555 /*
1556 * Set state to created. Thread will transition
1557 * to TD_INITIALIZED when it's done setting up.
1558 */
1559 td_set_runstate(td, TD_CREATED);
1560 map[this_jobs++] = td;
1561 nr_started++;
1562
1563 if (td->o.use_thread) {
1564 int ret;
1565
1566 dprint(FD_PROCESS, "will pthread_create\n");
1567 ret = pthread_create(&td->thread, NULL,
1568 thread_main, td);
1569 if (ret) {
1570 log_err("pthread_create: %s\n",
1571 strerror(ret));
1572 nr_started--;
1573 break;
1574 }
1575 ret = pthread_detach(td->thread);
1576 if (ret)
1577 log_err("pthread_detach: %s",
1578 strerror(ret));
1579 } else {
1580 pid_t pid;
1581 dprint(FD_PROCESS, "will fork\n");
1582 pid = fork();
1583 if (!pid) {
1584 int ret = fork_main(shm_id, i);
1585
1586 _exit(ret);
1587 } else if (i == fio_debug_jobno)
1588 *fio_debug_jobp = pid;
1589 }
1590 dprint(FD_MUTEX, "wait on startup_mutex\n");
1591 if (fio_mutex_down_timeout(startup_mutex, 10)) {
1592 log_err("fio: job startup hung? exiting.\n");
1593 fio_terminate_threads(TERMINATE_ALL);
1594 fio_abort = 1;
1595 nr_started--;
1596 break;
1597 }
1598 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1599 }
1600
1601 /*
1602 * Wait for the started threads to transition to
1603 * TD_INITIALIZED.
1604 */
1605 fio_gettime(&this_start, NULL);
1606 left = this_jobs;
1607 while (left && !fio_abort) {
1608 if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1609 break;
1610
1611 usleep(100000);
1612
1613 for (i = 0; i < this_jobs; i++) {
1614 td = map[i];
1615 if (!td)
1616 continue;
1617 if (td->runstate == TD_INITIALIZED) {
1618 map[i] = NULL;
1619 left--;
1620 } else if (td->runstate >= TD_EXITED) {
1621 map[i] = NULL;
1622 left--;
1623 todo--;
1624 nr_running++; /* work-around... */
1625 }
1626 }
1627 }
1628
1629 if (left) {
4e87c37a
JA		 1630 log_err("fio: %d job%s failed to start\n", left,
1631 left > 1 ? "s" : "");
2e1df07d
JA		 1632 for (i = 0; i < this_jobs; i++) {
1633 td = map[i];
1634 if (!td)
1635 continue;
1636 kill(td->pid, SIGTERM);
1637 }
1638 break;
1639 }
1640
1641 /*
1642 * start created threads (TD_INITIALIZED -> TD_RUNNING).
1643 */
1644 for_each_td(td, i) {
1645 if (td->runstate != TD_INITIALIZED)
1646 continue;
1647
1648 if (in_ramp_time(td))
1649 td_set_runstate(td, TD_RAMP);
1650 else
1651 td_set_runstate(td, TD_RUNNING);
1652 nr_running++;
1653 nr_started--;
342f4be4
JA		 1654 m_rate += ddir_rw_sum(td->o.ratemin);
1655 t_rate += ddir_rw_sum(td->o.rate);
2e1df07d
JA		 1656 todo--;
1657 fio_mutex_up(td->mutex);
1658 }
1659
1660 reap_threads(&nr_running, &t_rate, &m_rate);
1661
1662 if (todo) {
1663 if (is_backend)
1664 fio_server_idle_loop();
1665 else
1666 usleep(100000);
1667 }
1668 }
1669
1670 while (nr_running) {
1671 reap_threads(&nr_running, &t_rate, &m_rate);
1672
1673 if (is_backend)
1674 fio_server_idle_loop();
1675 else
1676 usleep(10000);
1677 }
1678
1679 update_io_ticks();
1680 fio_unpin_memory();
1681}
1682
9ec7779f
JA		 1683void wait_for_disk_thread_exit(void)
1684{
1685 fio_mutex_down(disk_thread_mutex);
1686}
1687
27357187
JA		 1688static void free_disk_util(void)
1689{
1690 disk_util_start_exit();
1691 wait_for_disk_thread_exit();
1692 disk_util_prune_entries();
1693}
1694
2e1df07d
JA		 1695static void *disk_thread_main(void *data)
1696{
9ec7779f
JA		 1697 int ret = 0;
1698
2e1df07d
JA		 1699 fio_mutex_up(startup_mutex);
1700
9ec7779f 1701 while (threads && !ret) {
2e1df07d
JA		 1702 usleep(DISK_UTIL_MSEC * 1000);
1703 if (!threads)
1704 break;
9ec7779f 1705 ret = update_io_ticks();
2e1df07d
JA		 1706
1707 if (!is_backend)
1708 print_thread_status();
1709 }
1710
9ec7779f 1711 fio_mutex_up(disk_thread_mutex);
2e1df07d
JA		 1712 return NULL;
1713}
1714
1715static int create_disk_util_thread(void)
1716{
1717 int ret;
1718
9ec7779f
JA		 1719 setup_disk_util();
1720
521da527 1721 disk_thread_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
9ec7779f 1722
2e1df07d
JA		 1723 ret = pthread_create(&disk_util_thread, NULL, disk_thread_main, NULL);
1724 if (ret) {
9ec7779f 1725 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1726 log_err("Can't create disk util thread: %s\n", strerror(ret));
1727 return 1;
1728 }
1729
1730 ret = pthread_detach(disk_util_thread);
1731 if (ret) {
9ec7779f 1732 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1733 log_err("Can't detatch disk util thread: %s\n", strerror(ret));
1734 return 1;
1735 }
1736
1737 dprint(FD_MUTEX, "wait on startup_mutex\n");
1738 fio_mutex_down(startup_mutex);
1739 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1740 return 0;
1741}
1742
2e1df07d
JA		 1743int fio_backend(void)
1744{
1745 struct thread_data *td;
1746 int i;
1747
1748 if (exec_profile) {
1749 if (load_profile(exec_profile))
1750 return 1;
1751 free(exec_profile);
1752 exec_profile = NULL;
1753 }
1754 if (!thread_number)
1755 return 0;
1756
1757 if (write_bw_log) {
1758 setup_log(&agg_io_log[DDIR_READ], 0);
1759 setup_log(&agg_io_log[DDIR_WRITE], 0);
6eaf09d6 1760 setup_log(&agg_io_log[DDIR_TRIM], 0);
2e1df07d
JA		 1761 }
1762
521da527 1763 startup_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
2e1df07d
JA		 1764 if (startup_mutex == NULL)
1765 return 1;
521da527 1766 writeout_mutex = fio_mutex_init(FIO_MUTEX_UNLOCKED);
2e1df07d
JA		 1767 if (writeout_mutex == NULL)
1768 return 1;
1769
1770 set_genesis_time();
1771 create_disk_util_thread();
1772
1773 cgroup_list = smalloc(sizeof(*cgroup_list));
1774 INIT_FLIST_HEAD(cgroup_list);
1775
1776 run_threads();
1777
1778 if (!fio_abort) {
1779 show_run_stats();
1780 if (write_bw_log) {
1781 __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1782 __finish_log(agg_io_log[DDIR_WRITE],
1783 "agg-write_bw.log");
6eaf09d6
SL		 1784 __finish_log(agg_io_log[DDIR_TRIM],
1785 "agg-write_bw.log");
2e1df07d
JA		 1786 }
1787 }
1788
1789 for_each_td(td, i)
1790 fio_options_free(td);
1791
a462baef 1792 free_disk_util();
2e1df07d
JA		 1793 cgroup_kill(cgroup_list);
1794 sfree(cgroup_list);
1795 sfree(cgroup_mnt);
1796
1797 fio_mutex_remove(startup_mutex);
1798 fio_mutex_remove(writeout_mutex);
9ec7779f 1799 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1800 return exit_value;
1801}
fio - Flexible IO Tester