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graph: fix bogus used initialized warning
[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;
feb41855 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;
812409e9
JA		 62static unsigned int nr_process = 0;
63static unsigned int nr_thread = 0;
2e1df07d 64
6eaf09d6 65struct io_log *agg_io_log[DDIR_RWDIR_CNT];
2e1df07d 66
a3efc919
JA		 67int groupid = 0;
68unsigned int thread_number = 0;
108fea77 69unsigned int stat_number = 0;
a3efc919
JA		 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
b852e7cf
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
b852e7cf
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;
28727df7 1008 struct thread_options *o = &td->o;
2e1df07d
JA		 1009 pthread_condattr_t attr;
1010 int clear_state;
28727df7 1011 int ret;
2e1df07d 1012
28727df7 1013 if (!o->use_thread) {
2e1df07d
JA		 1014 setsid();
1015 td->pid = getpid();
1016 } else
1017 td->pid = gettid();
1018
5d879392
JA		 1019 fio_local_clock_init(td->o.use_thread);
1020
2e1df07d
JA		 1021 dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1022
122c7725
JA		 1023 if (is_backend)
1024 fio_server_send_start(td);
1025
2e1df07d
JA		 1026 INIT_FLIST_HEAD(&td->io_u_freelist);
1027 INIT_FLIST_HEAD(&td->io_u_busylist);
1028 INIT_FLIST_HEAD(&td->io_u_requeues);
1029 INIT_FLIST_HEAD(&td->io_log_list);
1030 INIT_FLIST_HEAD(&td->io_hist_list);
1031 INIT_FLIST_HEAD(&td->verify_list);
1032 INIT_FLIST_HEAD(&td->trim_list);
1033 pthread_mutex_init(&td->io_u_lock, NULL);
1034 td->io_hist_tree = RB_ROOT;
1035
1036 pthread_condattr_init(&attr);
1037 pthread_cond_init(&td->verify_cond, &attr);
1038 pthread_cond_init(&td->free_cond, &attr);
1039
1040 td_set_runstate(td, TD_INITIALIZED);
1041 dprint(FD_MUTEX, "up startup_mutex\n");
1042 fio_mutex_up(startup_mutex);
1043 dprint(FD_MUTEX, "wait on td->mutex\n");
1044 fio_mutex_down(td->mutex);
1045 dprint(FD_MUTEX, "done waiting on td->mutex\n");
1046
1047 /*
1048 * the ->mutex mutex is now no longer used, close it to avoid
1049 * eating a file descriptor
1050 */
1051 fio_mutex_remove(td->mutex);
812409e9 1052 td->mutex = NULL;
2e1df07d
JA		 1053
1054 /*
1055 * A new gid requires privilege, so we need to do this before setting
1056 * the uid.
1057 */
28727df7 1058 if (o->gid != -1U && setgid(o->gid)) {
2e1df07d
JA		 1059 td_verror(td, errno, "setgid");
1060 goto err;
1061 }
28727df7 1062 if (o->uid != -1U && setuid(o->uid)) {
2e1df07d
JA		 1063 td_verror(td, errno, "setuid");
1064 goto err;
1065 }
1066
1067 /*
1068 * If we have a gettimeofday() thread, make sure we exclude that
1069 * thread from this job
1070 */
28727df7
JA		 1071 if (o->gtod_cpu)
1072 fio_cpu_clear(&o->cpumask, o->gtod_cpu);
2e1df07d
JA		 1073
1074 /*
1075 * Set affinity first, in case it has an impact on the memory
1076 * allocations.
1077 */
28727df7
JA		 1078 if (o->cpumask_set) {
1079 ret = fio_setaffinity(td->pid, o->cpumask);
1080 if (ret == -1) {
1081 td_verror(td, errno, "cpu_set_affinity");
1082 goto err;
1083 }
2e1df07d
JA		 1084 }
1085
1b79a070
JA		 1086 if (fio_pin_memory(td))
1087 goto err;
1088
d0b937ed
YR		 1089#ifdef FIO_HAVE_LIBNUMA
1090 /* numa node setup */
1091 if (td->o.numa_cpumask_set || td->o.numa_memmask_set) {
1092 int ret;
1093
1094 if (numa_available() < 0) {
1095 td_verror(td, errno, "Does not support NUMA API\n");
1096 goto err;
1097 }
1098
1099 if (td->o.numa_cpumask_set) {
1100 ret = numa_run_on_node_mask(td->o.numa_cpunodesmask);
1101 if (ret == -1) {
1102 td_verror(td, errno, \
1103 "numa_run_on_node_mask failed\n");
1104 goto err;
1105 }
1106 }
1107
1108 if (td->o.numa_memmask_set) {
1109
1110 switch (td->o.numa_mem_mode) {
1111 case MPOL_INTERLEAVE:
1112 numa_set_interleave_mask(td->o.numa_memnodesmask);
1113 break;
1114 case MPOL_BIND:
1115 numa_set_membind(td->o.numa_memnodesmask);
1116 break;
1117 case MPOL_LOCAL:
1118 numa_set_localalloc();
1119 break;
1120 case MPOL_PREFERRED:
1121 numa_set_preferred(td->o.numa_mem_prefer_node);
1122 break;
1123 case MPOL_DEFAULT:
1124 default:
1125 break;
1126 }
1127
1128 }
1129 }
1130#endif
1131
2e1df07d
JA		 1132 /*
1133 * May alter parameters that init_io_u() will use, so we need to
1134 * do this first.
1135 */
1136 if (init_iolog(td))
1137 goto err;
1138
1139 if (init_io_u(td))
1140 goto err;
1141
28727df7 1142 if (o->verify_async && verify_async_init(td))
2e1df07d
JA		 1143 goto err;
1144
28727df7
JA		 1145 if (o->ioprio) {
1146 ret = ioprio_set(IOPRIO_WHO_PROCESS, 0, o->ioprio_class, o->ioprio);
1147 if (ret == -1) {
2e1df07d
JA		 1148 td_verror(td, errno, "ioprio_set");
1149 goto err;
1150 }
1151 }
1152
5d89ff79 1153 if (td->o.cgroup && cgroup_setup(td, cgroup_list, &cgroup_mnt))
2e1df07d
JA		 1154 goto err;
1155
649c10c5 1156 errno = 0;
28727df7 1157 if (nice(o->nice) == -1 && errno != 0) {
2e1df07d
JA		 1158 td_verror(td, errno, "nice");
1159 goto err;
1160 }
1161
28727df7 1162 if (o->ioscheduler && switch_ioscheduler(td))
2e1df07d
JA		 1163 goto err;
1164
28727df7 1165 if (!o->create_serialize && setup_files(td))
2e1df07d
JA		 1166 goto err;
1167
1168 if (td_io_init(td))
1169 goto err;
1170
1171 if (init_random_map(td))
1172 goto err;
1173
28727df7
JA		 1174 if (o->exec_prerun && exec_string(o->exec_prerun))
1175 goto err;
2e1df07d 1176
28727df7 1177 if (o->pre_read) {
2e1df07d
JA		 1178 if (pre_read_files(td) < 0)
1179 goto err;
1180 }
1181
83ea422a
JA		 1182 fio_verify_init(td);
1183
2e1df07d
JA		 1184 fio_gettime(&td->epoch, NULL);
1185 getrusage(RUSAGE_SELF, &td->ru_start);
1186
1187 clear_state = 0;
1188 while (keep_running(td)) {
1189 fio_gettime(&td->start, NULL);
1190 memcpy(&td->bw_sample_time, &td->start, sizeof(td->start));
1191 memcpy(&td->iops_sample_time, &td->start, sizeof(td->start));
1192 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1193
6eaf09d6
SL		 1194 if (td->o.ratemin[DDIR_READ] || td->o.ratemin[DDIR_WRITE] ||
1195 td->o.ratemin[DDIR_TRIM]) {
1196 memcpy(&td->lastrate[DDIR_READ], &td->bw_sample_time,
2e1df07d 1197 sizeof(td->bw_sample_time));
6eaf09d6 1198 memcpy(&td->lastrate[DDIR_WRITE], &td->bw_sample_time,
2e1df07d 1199 sizeof(td->bw_sample_time));
6eaf09d6 1200 memcpy(&td->lastrate[DDIR_TRIM], &td->bw_sample_time,
2e1df07d
JA		 1201 sizeof(td->bw_sample_time));
1202 }
1203
1204 if (clear_state)
1205 clear_io_state(td);
1206
1207 prune_io_piece_log(td);
1208
1209 do_io(td);
1210
1211 clear_state = 1;
1212
1213 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1214 elapsed = utime_since_now(&td->start);
1215 td->ts.runtime[DDIR_READ] += elapsed;
1216 }
1217 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1218 elapsed = utime_since_now(&td->start);
1219 td->ts.runtime[DDIR_WRITE] += elapsed;
1220 }
6eaf09d6
SL		 1221 if (td_trim(td) && td->io_bytes[DDIR_TRIM]) {
1222 elapsed = utime_since_now(&td->start);
1223 td->ts.runtime[DDIR_TRIM] += elapsed;
1224 }
2e1df07d
JA		 1225
1226 if (td->error || td->terminate)
1227 break;
1228
1229 if (!td->o.do_verify ||
1230 td->o.verify == VERIFY_NONE ||
1231 (td->io_ops->flags & FIO_UNIDIR))
1232 continue;
1233
1234 clear_io_state(td);
1235
1236 fio_gettime(&td->start, NULL);
1237
1238 do_verify(td);
1239
1240 td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
1241
1242 if (td->error || td->terminate)
1243 break;
1244 }
1245
1246 update_rusage_stat(td);
6eaf09d6
SL		 1247 td->ts.runtime[DDIR_READ] = (td->ts.runtime[DDIR_READ] + 999) / 1000;
1248 td->ts.runtime[DDIR_WRITE] = (td->ts.runtime[DDIR_WRITE] + 999) / 1000;
1249 td->ts.runtime[DDIR_TRIM] = (td->ts.runtime[DDIR_TRIM] + 999) / 1000;
2e1df07d 1250 td->ts.total_run_time = mtime_since_now(&td->epoch);
6eaf09d6
SL		 1251 td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
1252 td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
1253 td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
2e1df07d 1254
1b79a070
JA		 1255 fio_unpin_memory(td);
1256
2e1df07d
JA		 1257 fio_mutex_down(writeout_mutex);
1258 if (td->bw_log) {
1259 if (td->o.bw_log_file) {
1260 finish_log_named(td, td->bw_log,
1261 td->o.bw_log_file, "bw");
1262 } else
1263 finish_log(td, td->bw_log, "bw");
1264 }
1265 if (td->lat_log) {
1266 if (td->o.lat_log_file) {
1267 finish_log_named(td, td->lat_log,
1268 td->o.lat_log_file, "lat");
1269 } else
1270 finish_log(td, td->lat_log, "lat");
1271 }
1272 if (td->slat_log) {
1273 if (td->o.lat_log_file) {
1274 finish_log_named(td, td->slat_log,
1275 td->o.lat_log_file, "slat");
1276 } else
1277 finish_log(td, td->slat_log, "slat");
1278 }
1279 if (td->clat_log) {
1280 if (td->o.lat_log_file) {
1281 finish_log_named(td, td->clat_log,
1282 td->o.lat_log_file, "clat");
1283 } else
1284 finish_log(td, td->clat_log, "clat");
1285 }
1286 if (td->iops_log) {
1287 if (td->o.iops_log_file) {
1288 finish_log_named(td, td->iops_log,
1289 td->o.iops_log_file, "iops");
1290 } else
1291 finish_log(td, td->iops_log, "iops");
1292 }
1293
1294 fio_mutex_up(writeout_mutex);
1295 if (td->o.exec_postrun)
1296 exec_string(td->o.exec_postrun);
1297
1298 if (exitall_on_terminate)
1299 fio_terminate_threads(td->groupid);
1300
1301err:
1302 if (td->error)
1303 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1304 td->verror);
1305
1306 if (td->o.verify_async)
1307 verify_async_exit(td);
1308
1309 close_and_free_files(td);
2e1df07d 1310 cleanup_io_u(td);
32dbca2c 1311 close_ioengine(td);
2e1df07d
JA		 1312 cgroup_shutdown(td, &cgroup_mnt);
1313
28727df7
JA		 1314 if (o->cpumask_set) {
1315 int ret = fio_cpuset_exit(&o->cpumask);
2e1df07d
JA		 1316
1317 td_verror(td, ret, "fio_cpuset_exit");
1318 }
1319
1320 /*
1321 * do this very late, it will log file closing as well
1322 */
1323 if (td->o.write_iolog_file)
1324 write_iolog_close(td);
1325
1326 td_set_runstate(td, TD_EXITED);
e43606c2 1327 return (void *) (uintptr_t) td->error;
2e1df07d
JA		 1328}
1329
1330
1331/*
1332 * We cannot pass the td data into a forked process, so attach the td and
1333 * pass it to the thread worker.
1334 */
1335static int fork_main(int shmid, int offset)
1336{
1337 struct thread_data *td;
1338 void *data, *ret;
1339
1340#ifndef __hpux
1341 data = shmat(shmid, NULL, 0);
1342 if (data == (void *) -1) {
1343 int __err = errno;
1344
1345 perror("shmat");
1346 return __err;
1347 }
1348#else
1349 /*
1350 * HP-UX inherits shm mappings?
1351 */
1352 data = threads;
1353#endif
1354
1355 td = data + offset * sizeof(struct thread_data);
1356 ret = thread_main(td);
1357 shmdt(data);
e43606c2 1358 return (int) (uintptr_t) ret;
2e1df07d
JA		 1359}
1360
1361/*
1362 * Run over the job map and reap the threads that have exited, if any.
1363 */
1364static void reap_threads(unsigned int *nr_running, unsigned int *t_rate,
1365 unsigned int *m_rate)
1366{
1367 struct thread_data *td;
1368 unsigned int cputhreads, realthreads, pending;
1369 int i, status, ret;
1370
1371 /*
1372 * reap exited threads (TD_EXITED -> TD_REAPED)
1373 */
1374 realthreads = pending = cputhreads = 0;
1375 for_each_td(td, i) {
1376 int flags = 0;
1377
1378 /*
1379 * ->io_ops is NULL for a thread that has closed its
1380 * io engine
1381 */
1382 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1383 cputhreads++;
1384 else
1385 realthreads++;
1386
1387 if (!td->pid) {
1388 pending++;
1389 continue;
1390 }
1391 if (td->runstate == TD_REAPED)
1392 continue;
1393 if (td->o.use_thread) {
1394 if (td->runstate == TD_EXITED) {
1395 td_set_runstate(td, TD_REAPED);
1396 goto reaped;
1397 }
1398 continue;
1399 }
1400
1401 flags = WNOHANG;
1402 if (td->runstate == TD_EXITED)
1403 flags = 0;
1404
1405 /*
1406 * check if someone quit or got killed in an unusual way
1407 */
1408 ret = waitpid(td->pid, &status, flags);
1409 if (ret < 0) {
1410 if (errno == ECHILD) {
1411 log_err("fio: pid=%d disappeared %d\n",
1412 (int) td->pid, td->runstate);
a5e371a6 1413 td->sig = ECHILD;
2e1df07d
JA		 1414 td_set_runstate(td, TD_REAPED);
1415 goto reaped;
1416 }
1417 perror("waitpid");
1418 } else if (ret == td->pid) {
1419 if (WIFSIGNALED(status)) {
1420 int sig = WTERMSIG(status);
1421
36d80bc7 1422 if (sig != SIGTERM && sig != SIGUSR2)
2e1df07d
JA		 1423 log_err("fio: pid=%d, got signal=%d\n",
1424 (int) td->pid, sig);
a5e371a6 1425 td->sig = sig;
2e1df07d
JA		 1426 td_set_runstate(td, TD_REAPED);
1427 goto reaped;
1428 }
1429 if (WIFEXITED(status)) {
1430 if (WEXITSTATUS(status) && !td->error)
1431 td->error = WEXITSTATUS(status);
1432
1433 td_set_runstate(td, TD_REAPED);
1434 goto reaped;
1435 }
1436 }
1437
1438 /*
1439 * thread is not dead, continue
1440 */
1441 pending++;
1442 continue;
1443reaped:
1444 (*nr_running)--;
342f4be4
JA		 1445 (*m_rate) -= ddir_rw_sum(td->o.ratemin);
1446 (*t_rate) -= ddir_rw_sum(td->o.rate);
2e1df07d
JA		 1447 if (!td->pid)
1448 pending--;
1449
1450 if (td->error)
1451 exit_value++;
1452
1453 done_secs += mtime_since_now(&td->epoch) / 1000;
1454 }
1455
1456 if (*nr_running == cputhreads && !pending && realthreads)
1457 fio_terminate_threads(TERMINATE_ALL);
1458}
1459
2e1df07d
JA		 1460/*
1461 * Main function for kicking off and reaping jobs, as needed.
1462 */
1463static void run_threads(void)
1464{
1465 struct thread_data *td;
1466 unsigned long spent;
1467 unsigned int i, todo, nr_running, m_rate, t_rate, nr_started;
1468
2e1df07d
JA		 1469 if (fio_gtod_offload && fio_start_gtod_thread())
1470 return;
1471
1472 set_sig_handlers();
1473
812409e9
JA		 1474 nr_thread = nr_process = 0;
1475 for_each_td(td, i) {
1476 if (td->o.use_thread)
1477 nr_thread++;
1478 else
1479 nr_process++;
1480 }
1481
f3afa57e 1482 if (output_format == FIO_OUTPUT_NORMAL) {
2e1df07d
JA		 1483 log_info("Starting ");
1484 if (nr_thread)
1485 log_info("%d thread%s", nr_thread,
1486 nr_thread > 1 ? "s" : "");
1487 if (nr_process) {
1488 if (nr_thread)
1489 log_info(" and ");
1490 log_info("%d process%s", nr_process,
1491 nr_process > 1 ? "es" : "");
1492 }
1493 log_info("\n");
1494 fflush(stdout);
1495 }
1496
1497 todo = thread_number;
1498 nr_running = 0;
1499 nr_started = 0;
1500 m_rate = t_rate = 0;
1501
1502 for_each_td(td, i) {
1503 print_status_init(td->thread_number - 1);
1504
1505 if (!td->o.create_serialize)
1506 continue;
1507
1508 /*
1509 * do file setup here so it happens sequentially,
1510 * we don't want X number of threads getting their
1511 * client data interspersed on disk
1512 */
1513 if (setup_files(td)) {
1514 exit_value++;
1515 if (td->error)
1516 log_err("fio: pid=%d, err=%d/%s\n",
1517 (int) td->pid, td->error, td->verror);
1518 td_set_runstate(td, TD_REAPED);
1519 todo--;
1520 } else {
1521 struct fio_file *f;
1522 unsigned int j;
1523
1524 /*
1525 * for sharing to work, each job must always open
1526 * its own files. so close them, if we opened them
1527 * for creation
1528 */
1529 for_each_file(td, f, j) {
1530 if (fio_file_open(f))
1531 td_io_close_file(td, f);
1532 }
1533 }
1534 }
1535
1536 set_genesis_time();
1537
1538 while (todo) {
1539 struct thread_data *map[REAL_MAX_JOBS];
1540 struct timeval this_start;
1541 int this_jobs = 0, left;
1542
1543 /*
1544 * create threads (TD_NOT_CREATED -> TD_CREATED)
1545 */
1546 for_each_td(td, i) {
1547 if (td->runstate != TD_NOT_CREATED)
1548 continue;
1549
1550 /*
1551 * never got a chance to start, killed by other
1552 * thread for some reason
1553 */
1554 if (td->terminate) {
1555 todo--;
1556 continue;
1557 }
1558
1559 if (td->o.start_delay) {
1560 spent = mtime_since_genesis();
1561
1562 if (td->o.start_delay * 1000 > spent)
1563 continue;
1564 }
1565
1566 if (td->o.stonewall && (nr_started || nr_running)) {
1567 dprint(FD_PROCESS, "%s: stonewall wait\n",
1568 td->o.name);
1569 break;
1570 }
1571
1572 init_disk_util(td);
1573
1574 /*
1575 * Set state to created. Thread will transition
1576 * to TD_INITIALIZED when it's done setting up.
1577 */
1578 td_set_runstate(td, TD_CREATED);
1579 map[this_jobs++] = td;
1580 nr_started++;
1581
1582 if (td->o.use_thread) {
1583 int ret;
1584
1585 dprint(FD_PROCESS, "will pthread_create\n");
1586 ret = pthread_create(&td->thread, NULL,
1587 thread_main, td);
1588 if (ret) {
1589 log_err("pthread_create: %s\n",
1590 strerror(ret));
1591 nr_started--;
1592 break;
1593 }
1594 ret = pthread_detach(td->thread);
1595 if (ret)
1596 log_err("pthread_detach: %s",
1597 strerror(ret));
1598 } else {
1599 pid_t pid;
1600 dprint(FD_PROCESS, "will fork\n");
1601 pid = fork();
1602 if (!pid) {
1603 int ret = fork_main(shm_id, i);
1604
1605 _exit(ret);
1606 } else if (i == fio_debug_jobno)
1607 *fio_debug_jobp = pid;
1608 }
1609 dprint(FD_MUTEX, "wait on startup_mutex\n");
1610 if (fio_mutex_down_timeout(startup_mutex, 10)) {
1611 log_err("fio: job startup hung? exiting.\n");
1612 fio_terminate_threads(TERMINATE_ALL);
1613 fio_abort = 1;
1614 nr_started--;
1615 break;
1616 }
1617 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1618 }
1619
1620 /*
1621 * Wait for the started threads to transition to
1622 * TD_INITIALIZED.
1623 */
1624 fio_gettime(&this_start, NULL);
1625 left = this_jobs;
1626 while (left && !fio_abort) {
1627 if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1628 break;
1629
1630 usleep(100000);
1631
1632 for (i = 0; i < this_jobs; i++) {
1633 td = map[i];
1634 if (!td)
1635 continue;
1636 if (td->runstate == TD_INITIALIZED) {
1637 map[i] = NULL;
1638 left--;
1639 } else if (td->runstate >= TD_EXITED) {
1640 map[i] = NULL;
1641 left--;
1642 todo--;
1643 nr_running++; /* work-around... */
1644 }
1645 }
1646 }
1647
1648 if (left) {
4e87c37a
JA		 1649 log_err("fio: %d job%s failed to start\n", left,
1650 left > 1 ? "s" : "");
2e1df07d
JA		 1651 for (i = 0; i < this_jobs; i++) {
1652 td = map[i];
1653 if (!td)
1654 continue;
1655 kill(td->pid, SIGTERM);
1656 }
1657 break;
1658 }
1659
1660 /*
1661 * start created threads (TD_INITIALIZED -> TD_RUNNING).
1662 */
1663 for_each_td(td, i) {
1664 if (td->runstate != TD_INITIALIZED)
1665 continue;
1666
1667 if (in_ramp_time(td))
1668 td_set_runstate(td, TD_RAMP);
1669 else
1670 td_set_runstate(td, TD_RUNNING);
1671 nr_running++;
1672 nr_started--;
342f4be4
JA		 1673 m_rate += ddir_rw_sum(td->o.ratemin);
1674 t_rate += ddir_rw_sum(td->o.rate);
2e1df07d
JA		 1675 todo--;
1676 fio_mutex_up(td->mutex);
1677 }
1678
1679 reap_threads(&nr_running, &t_rate, &m_rate);
1680
122c7725
JA		 1681 if (todo)
1682 usleep(100000);
2e1df07d
JA		 1683 }
1684
1685 while (nr_running) {
1686 reap_threads(&nr_running, &t_rate, &m_rate);
122c7725 1687 usleep(10000);
2e1df07d
JA		 1688 }
1689
1690 update_io_ticks();
2e1df07d
JA		 1691}
1692
feb41855
JA		 1693void wait_for_disk_thread_exit(void)
1694{
1695 fio_mutex_down(disk_thread_mutex);
1696}
1697
27357187
JA		 1698static void free_disk_util(void)
1699{
1700 disk_util_start_exit();
1701 wait_for_disk_thread_exit();
1702 disk_util_prune_entries();
1703}
1704
2e1df07d
JA		 1705static void *disk_thread_main(void *data)
1706{
feb41855
JA		 1707 int ret = 0;
1708
2e1df07d
JA		 1709 fio_mutex_up(startup_mutex);
1710
feb41855 1711 while (threads && !ret) {
2e1df07d
JA		 1712 usleep(DISK_UTIL_MSEC * 1000);
1713 if (!threads)
1714 break;
feb41855 1715 ret = update_io_ticks();
2e1df07d
JA		 1716
1717 if (!is_backend)
1718 print_thread_status();
1719 }
1720
feb41855 1721 fio_mutex_up(disk_thread_mutex);
2e1df07d
JA		 1722 return NULL;
1723}
1724
1725static int create_disk_util_thread(void)
1726{
1727 int ret;
1728
feb41855
JA		 1729 setup_disk_util();
1730
521da527 1731 disk_thread_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
feb41855 1732
2e1df07d
JA		 1733 ret = pthread_create(&disk_util_thread, NULL, disk_thread_main, NULL);
1734 if (ret) {
feb41855 1735 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1736 log_err("Can't create disk util thread: %s\n", strerror(ret));
1737 return 1;
1738 }
1739
1740 ret = pthread_detach(disk_util_thread);
1741 if (ret) {
feb41855 1742 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1743 log_err("Can't detatch disk util thread: %s\n", strerror(ret));
1744 return 1;
1745 }
1746
1747 dprint(FD_MUTEX, "wait on startup_mutex\n");
1748 fio_mutex_down(startup_mutex);
1749 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1750 return 0;
1751}
1752
2e1df07d
JA		 1753int fio_backend(void)
1754{
1755 struct thread_data *td;
1756 int i;
1757
1758 if (exec_profile) {
1759 if (load_profile(exec_profile))
1760 return 1;
1761 free(exec_profile);
1762 exec_profile = NULL;
1763 }
1764 if (!thread_number)
1765 return 0;
1766
1767 if (write_bw_log) {
ea51b956
JA		 1768 setup_log(&agg_io_log[DDIR_READ], 0, IO_LOG_TYPE_BW);
1769 setup_log(&agg_io_log[DDIR_WRITE], 0, IO_LOG_TYPE_BW);
d79db122 1770 setup_log(&agg_io_log[DDIR_TRIM], 0, IO_LOG_TYPE_BW);
2e1df07d
JA		 1771 }
1772
521da527 1773 startup_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
2e1df07d
JA		 1774 if (startup_mutex == NULL)
1775 return 1;
521da527 1776 writeout_mutex = fio_mutex_init(FIO_MUTEX_UNLOCKED);
2e1df07d
JA		 1777 if (writeout_mutex == NULL)
1778 return 1;
1779
1780 set_genesis_time();
1781 create_disk_util_thread();
1782
1783 cgroup_list = smalloc(sizeof(*cgroup_list));
1784 INIT_FLIST_HEAD(cgroup_list);
1785
1786 run_threads();
1787
1788 if (!fio_abort) {
1789 show_run_stats();
1790 if (write_bw_log) {
1791 __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1792 __finish_log(agg_io_log[DDIR_WRITE],
1793 "agg-write_bw.log");
6eaf09d6
SL		 1794 __finish_log(agg_io_log[DDIR_TRIM],
1795 "agg-write_bw.log");
2e1df07d
JA		 1796 }
1797 }
1798
1799 for_each_td(td, i)
1800 fio_options_free(td);
1801
d44256b0 1802 free_disk_util();
2e1df07d
JA		 1803 cgroup_kill(cgroup_list);
1804 sfree(cgroup_list);
1805 sfree(cgroup_mnt);
1806
1807 fio_mutex_remove(startup_mutex);
1808 fio_mutex_remove(writeout_mutex);
feb41855 1809 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1810 return exit_value;
1811}
fio - Flexible IO Tester