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