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[fio.git] / backend.c
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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;
342f4be4 720 if (!ddir_rw_sum(bytes_done))
2e1df07d
JA		 721 continue;
722
723 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
724 if (check_min_rate(td, &comp_time, bytes_done)) {
725 if (exitall_on_terminate)
726 fio_terminate_threads(td->groupid);
727 td_verror(td, EIO, "check_min_rate");
728 break;
729 }
730 }
731
732 if (td->o.thinktime) {
733 unsigned long long b;
734
342f4be4 735 b = ddir_rw_sum(td->io_blocks);
2e1df07d
JA		 736 if (!(b % td->o.thinktime_blocks)) {
737 int left;
738
739 if (td->o.thinktime_spin)
740 usec_spin(td->o.thinktime_spin);
741
742 left = td->o.thinktime - td->o.thinktime_spin;
743 if (left)
744 usec_sleep(td, left);
745 }
746 }
747 }
748
749 if (td->trim_entries)
750 log_err("fio: %d trim entries leaked?\n", td->trim_entries);
751
752 if (td->o.fill_device && td->error == ENOSPC) {
753 td->error = 0;
754 td->terminate = 1;
755 }
756 if (!td->error) {
757 struct fio_file *f;
758
759 i = td->cur_depth;
760 if (i) {
761 ret = io_u_queued_complete(td, i, NULL);
762 if (td->o.fill_device && td->error == ENOSPC)
763 td->error = 0;
764 }
765
766 if (should_fsync(td) && td->o.end_fsync) {
767 td_set_runstate(td, TD_FSYNCING);
768
769 for_each_file(td, f, i) {
770 if (!fio_file_open(f))
771 continue;
772 fio_io_sync(td, f);
773 }
774 }
775 } else
776 cleanup_pending_aio(td);
777
778 /*
779 * stop job if we failed doing any IO
780 */
342f4be4 781 if (!ddir_rw_sum(td->this_io_bytes))
2e1df07d
JA		 782 td->done = 1;
783}
784
785static void cleanup_io_u(struct thread_data *td)
786{
787 struct flist_head *entry, *n;
788 struct io_u *io_u;
789
790 flist_for_each_safe(entry, n, &td->io_u_freelist) {
791 io_u = flist_entry(entry, struct io_u, list);
792
793 flist_del(&io_u->list);
794 fio_memfree(io_u, sizeof(*io_u));
795 }
796
797 free_io_mem(td);
798}
799
800static int init_io_u(struct thread_data *td)
801{
802 struct io_u *io_u;
9c42684e 803 unsigned int max_bs, min_write;
2e1df07d
JA		 804 int cl_align, i, max_units;
805 char *p;
806
807 max_units = td->o.iodepth;
808 max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
6eaf09d6 809 max_bs = max(td->o.max_bs[DDIR_TRIM], max_bs);
9c42684e 810 min_write = td->o.min_bs[DDIR_WRITE];
2e1df07d
JA		 811 td->orig_buffer_size = (unsigned long long) max_bs
812 * (unsigned long long) max_units;
813
814 if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
815 unsigned long bs;
816
817 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
818 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
819 }
820
821 if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
822 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
823 return 1;
824 }
825
826 if (allocate_io_mem(td))
827 return 1;
828
829 if (td->o.odirect || td->o.mem_align ||
830 (td->io_ops->flags & FIO_RAWIO))
831 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
832 else
833 p = td->orig_buffer;
834
835 cl_align = os_cache_line_size();
836
837 for (i = 0; i < max_units; i++) {
838 void *ptr;
839
840 if (td->terminate)
841 return 1;
842
843 ptr = fio_memalign(cl_align, sizeof(*io_u));
844 if (!ptr) {
845 log_err("fio: unable to allocate aligned memory\n");
846 break;
847 }
848
849 io_u = ptr;
850 memset(io_u, 0, sizeof(*io_u));
851 INIT_FLIST_HEAD(&io_u->list);
852 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
853
854 if (!(td->io_ops->flags & FIO_NOIO)) {
855 io_u->buf = p;
856 dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
857
858 if (td_write(td))
9c42684e 859 io_u_fill_buffer(td, io_u, min_write, max_bs);
2e1df07d
JA		 860 if (td_write(td) && td->o.verify_pattern_bytes) {
861 /*
862 * Fill the buffer with the pattern if we are
863 * going to be doing writes.
864 */
865 fill_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
866 }
867 }
868
869 io_u->index = i;
870 io_u->flags = IO_U_F_FREE;
871 flist_add(&io_u->list, &td->io_u_freelist);
872 p += max_bs;
873 }
874
875 return 0;
876}
877
878static int switch_ioscheduler(struct thread_data *td)
879{
880 char tmp[256], tmp2[128];
881 FILE *f;
882 int ret;
883
884 if (td->io_ops->flags & FIO_DISKLESSIO)
885 return 0;
886
887 sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
888
889 f = fopen(tmp, "r+");
890 if (!f) {
891 if (errno == ENOENT) {
892 log_err("fio: os or kernel doesn't support IO scheduler"
893 " switching\n");
894 return 0;
895 }
896 td_verror(td, errno, "fopen iosched");
897 return 1;
898 }
899
900 /*
901 * Set io scheduler.
902 */
903 ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
904 if (ferror(f) || ret != 1) {
905 td_verror(td, errno, "fwrite");
906 fclose(f);
907 return 1;
908 }
909
910 rewind(f);
911
912 /*
913 * Read back and check that the selected scheduler is now the default.
914 */
915 ret = fread(tmp, 1, sizeof(tmp), f);
916 if (ferror(f) || ret < 0) {
917 td_verror(td, errno, "fread");
918 fclose(f);
919 return 1;
920 }
921
922 sprintf(tmp2, "[%s]", td->o.ioscheduler);
923 if (!strstr(tmp, tmp2)) {
924 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
925 td_verror(td, EINVAL, "iosched_switch");
926 fclose(f);
927 return 1;
928 }
929
930 fclose(f);
931 return 0;
932}
933
934static int keep_running(struct thread_data *td)
935{
2e1df07d
JA		 936 if (td->done)
937 return 0;
938 if (td->o.time_based)
939 return 1;
940 if (td->o.loops) {
941 td->o.loops--;
942 return 1;
943 }
944
342f4be4 945 if (ddir_rw_sum(td->io_bytes) < td->o.size)
2e1df07d
JA		 946 return 1;
947
948 return 0;
949}
950
951static int exec_string(const char *string)
952{
953 int ret, newlen = strlen(string) + 1 + 8;
954 char *str;
955
956 str = malloc(newlen);
957 sprintf(str, "sh -c %s", string);
958
959 ret = system(str);
960 if (ret == -1)
961 log_err("fio: exec of cmd <%s> failed\n", str);
962
963 free(str);
964 return ret;
965}
966
967/*
968 * Entry point for the thread based jobs. The process based jobs end up
969 * here as well, after a little setup.
970 */
971static void *thread_main(void *data)
972{
973 unsigned long long elapsed;
974 struct thread_data *td = data;
975 pthread_condattr_t attr;
976 int clear_state;
977
978 if (!td->o.use_thread) {
979 setsid();
980 td->pid = getpid();
981 } else
982 td->pid = gettid();
983
984 dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
985
986 INIT_FLIST_HEAD(&td->io_u_freelist);
987 INIT_FLIST_HEAD(&td->io_u_busylist);
988 INIT_FLIST_HEAD(&td->io_u_requeues);
989 INIT_FLIST_HEAD(&td->io_log_list);
990 INIT_FLIST_HEAD(&td->io_hist_list);
991 INIT_FLIST_HEAD(&td->verify_list);
992 INIT_FLIST_HEAD(&td->trim_list);
993 pthread_mutex_init(&td->io_u_lock, NULL);
994 td->io_hist_tree = RB_ROOT;
995
996 pthread_condattr_init(&attr);
997 pthread_cond_init(&td->verify_cond, &attr);
998 pthread_cond_init(&td->free_cond, &attr);
999
1000 td_set_runstate(td, TD_INITIALIZED);
1001 dprint(FD_MUTEX, "up startup_mutex\n");
1002 fio_mutex_up(startup_mutex);
1003 dprint(FD_MUTEX, "wait on td->mutex\n");
1004 fio_mutex_down(td->mutex);
1005 dprint(FD_MUTEX, "done waiting on td->mutex\n");
1006
1007 /*
1008 * the ->mutex mutex is now no longer used, close it to avoid
1009 * eating a file descriptor
1010 */
1011 fio_mutex_remove(td->mutex);
1012
1013 /*
1014 * A new gid requires privilege, so we need to do this before setting
1015 * the uid.
1016 */
1017 if (td->o.gid != -1U && setgid(td->o.gid)) {
1018 td_verror(td, errno, "setgid");
1019 goto err;
1020 }
1021 if (td->o.uid != -1U && setuid(td->o.uid)) {
1022 td_verror(td, errno, "setuid");
1023 goto err;
1024 }
1025
1026 /*
1027 * If we have a gettimeofday() thread, make sure we exclude that
1028 * thread from this job
1029 */
1030 if (td->o.gtod_cpu)
1031 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
1032
1033 /*
1034 * Set affinity first, in case it has an impact on the memory
1035 * allocations.
1036 */
1037 if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1038 td_verror(td, errno, "cpu_set_affinity");
1039 goto err;
1040 }
1041
1042 /*
1043 * May alter parameters that init_io_u() will use, so we need to
1044 * do this first.
1045 */
1046 if (init_iolog(td))
1047 goto err;
1048
1049 if (init_io_u(td))
1050 goto err;
1051
1052 if (td->o.verify_async && verify_async_init(td))
1053 goto err;
1054
1055 if (td->ioprio_set) {
1056 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1057 td_verror(td, errno, "ioprio_set");
1058 goto err;
1059 }
1060 }
1061
5d89ff79 1062 if (td->o.cgroup && cgroup_setup(td, cgroup_list, &cgroup_mnt))
2e1df07d
JA		 1063 goto err;
1064
649c10c5
BC		 1065 errno = 0;
1066 if (nice(td->o.nice) == -1 && errno != 0) {
2e1df07d
JA		 1067 td_verror(td, errno, "nice");
1068 goto err;
1069 }
1070
1071 if (td->o.ioscheduler && switch_ioscheduler(td))
1072 goto err;
1073
1074 if (!td->o.create_serialize && setup_files(td))
1075 goto err;
1076
1077 if (td_io_init(td))
1078 goto err;
1079
1080 if (init_random_map(td))
1081 goto err;
1082
1083 if (td->o.exec_prerun) {
1084 if (exec_string(td->o.exec_prerun))
1085 goto err;
1086 }
1087
1088 if (td->o.pre_read) {
1089 if (pre_read_files(td) < 0)
1090 goto err;
1091 }
1092
1093 fio_gettime(&td->epoch, NULL);
1094 getrusage(RUSAGE_SELF, &td->ru_start);
1095
1096 clear_state = 0;
1097 while (keep_running(td)) {
1098 fio_gettime(&td->start, NULL);
1099 memcpy(&td->bw_sample_time, &td->start, sizeof(td->start));
1100 memcpy(&td->iops_sample_time, &td->start, sizeof(td->start));
1101 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1102
6eaf09d6
SL		 1103 if (td->o.ratemin[DDIR_READ] || td->o.ratemin[DDIR_WRITE] ||
1104 td->o.ratemin[DDIR_TRIM]) {
1105 memcpy(&td->lastrate[DDIR_READ], &td->bw_sample_time,
2e1df07d 1106 sizeof(td->bw_sample_time));
6eaf09d6
SL		 1107 memcpy(&td->lastrate[DDIR_WRITE], &td->bw_sample_time,
1108 sizeof(td->bw_sample_time));
1109 memcpy(&td->lastrate[DDIR_TRIM], &td->bw_sample_time,
2e1df07d
JA		 1110 sizeof(td->bw_sample_time));
1111 }
1112
1113 if (clear_state)
1114 clear_io_state(td);
1115
1116 prune_io_piece_log(td);
1117
1118 do_io(td);
1119
1120 clear_state = 1;
1121
1122 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1123 elapsed = utime_since_now(&td->start);
1124 td->ts.runtime[DDIR_READ] += elapsed;
1125 }
1126 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1127 elapsed = utime_since_now(&td->start);
1128 td->ts.runtime[DDIR_WRITE] += elapsed;
1129 }
6eaf09d6
SL		 1130 if (td_trim(td) && td->io_bytes[DDIR_TRIM]) {
1131 elapsed = utime_since_now(&td->start);
1132 td->ts.runtime[DDIR_TRIM] += elapsed;
1133 }
2e1df07d
JA		 1134
1135 if (td->error || td->terminate)
1136 break;
1137
1138 if (!td->o.do_verify ||
1139 td->o.verify == VERIFY_NONE ||
1140 (td->io_ops->flags & FIO_UNIDIR))
1141 continue;
1142
1143 clear_io_state(td);
1144
1145 fio_gettime(&td->start, NULL);
1146
1147 do_verify(td);
1148
1149 td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
1150
1151 if (td->error || td->terminate)
1152 break;
1153 }
1154
1155 update_rusage_stat(td);
6eaf09d6
SL		 1156 td->ts.runtime[DDIR_READ] = (td->ts.runtime[DDIR_READ] + 999) / 1000;
1157 td->ts.runtime[DDIR_WRITE] = (td->ts.runtime[DDIR_WRITE] + 999) / 1000;
1158 td->ts.runtime[DDIR_TRIM] = (td->ts.runtime[DDIR_TRIM] + 999) / 1000;
2e1df07d 1159 td->ts.total_run_time = mtime_since_now(&td->epoch);
6eaf09d6
SL		 1160 td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
1161 td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
1162 td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
2e1df07d
JA		 1163
1164 fio_mutex_down(writeout_mutex);
1165 if (td->bw_log) {
1166 if (td->o.bw_log_file) {
1167 finish_log_named(td, td->bw_log,
1168 td->o.bw_log_file, "bw");
1169 } else
1170 finish_log(td, td->bw_log, "bw");
1171 }
1172 if (td->lat_log) {
1173 if (td->o.lat_log_file) {
1174 finish_log_named(td, td->lat_log,
1175 td->o.lat_log_file, "lat");
1176 } else
1177 finish_log(td, td->lat_log, "lat");
1178 }
1179 if (td->slat_log) {
1180 if (td->o.lat_log_file) {
1181 finish_log_named(td, td->slat_log,
1182 td->o.lat_log_file, "slat");
1183 } else
1184 finish_log(td, td->slat_log, "slat");
1185 }
1186 if (td->clat_log) {
1187 if (td->o.lat_log_file) {
1188 finish_log_named(td, td->clat_log,
1189 td->o.lat_log_file, "clat");
1190 } else
1191 finish_log(td, td->clat_log, "clat");
1192 }
1193 if (td->iops_log) {
1194 if (td->o.iops_log_file) {
1195 finish_log_named(td, td->iops_log,
1196 td->o.iops_log_file, "iops");
1197 } else
1198 finish_log(td, td->iops_log, "iops");
1199 }
1200
1201 fio_mutex_up(writeout_mutex);
1202 if (td->o.exec_postrun)
1203 exec_string(td->o.exec_postrun);
1204
1205 if (exitall_on_terminate)
1206 fio_terminate_threads(td->groupid);
1207
1208err:
1209 if (td->error)
1210 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1211 td->verror);
1212
1213 if (td->o.verify_async)
1214 verify_async_exit(td);
1215
1216 close_and_free_files(td);
1217 close_ioengine(td);
1218 cleanup_io_u(td);
1219 cgroup_shutdown(td, &cgroup_mnt);
1220
1221 if (td->o.cpumask_set) {
1222 int ret = fio_cpuset_exit(&td->o.cpumask);
1223
1224 td_verror(td, ret, "fio_cpuset_exit");
1225 }
1226
1227 /*
1228 * do this very late, it will log file closing as well
1229 */
1230 if (td->o.write_iolog_file)
1231 write_iolog_close(td);
1232
1233 td_set_runstate(td, TD_EXITED);
e43606c2 1234 return (void *) (uintptr_t) td->error;
2e1df07d
JA		 1235}
1236
1237
1238/*
1239 * We cannot pass the td data into a forked process, so attach the td and
1240 * pass it to the thread worker.
1241 */
1242static int fork_main(int shmid, int offset)
1243{
1244 struct thread_data *td;
1245 void *data, *ret;
1246
1247#ifndef __hpux
1248 data = shmat(shmid, NULL, 0);
1249 if (data == (void *) -1) {
1250 int __err = errno;
1251
1252 perror("shmat");
1253 return __err;
1254 }
1255#else
1256 /*
1257 * HP-UX inherits shm mappings?
1258 */
1259 data = threads;
1260#endif
1261
1262 td = data + offset * sizeof(struct thread_data);
1263 ret = thread_main(td);
1264 shmdt(data);
e43606c2 1265 return (int) (uintptr_t) ret;
2e1df07d
JA		 1266}
1267
1268/*
1269 * Run over the job map and reap the threads that have exited, if any.
1270 */
1271static void reap_threads(unsigned int *nr_running, unsigned int *t_rate,
1272 unsigned int *m_rate)
1273{
1274 struct thread_data *td;
1275 unsigned int cputhreads, realthreads, pending;
1276 int i, status, ret;
1277
1278 /*
1279 * reap exited threads (TD_EXITED -> TD_REAPED)
1280 */
1281 realthreads = pending = cputhreads = 0;
1282 for_each_td(td, i) {
1283 int flags = 0;
1284
1285 /*
1286 * ->io_ops is NULL for a thread that has closed its
1287 * io engine
1288 */
1289 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1290 cputhreads++;
1291 else
1292 realthreads++;
1293
1294 if (!td->pid) {
1295 pending++;
1296 continue;
1297 }
1298 if (td->runstate == TD_REAPED)
1299 continue;
1300 if (td->o.use_thread) {
1301 if (td->runstate == TD_EXITED) {
1302 td_set_runstate(td, TD_REAPED);
1303 goto reaped;
1304 }
1305 continue;
1306 }
1307
1308 flags = WNOHANG;
1309 if (td->runstate == TD_EXITED)
1310 flags = 0;
1311
1312 /*
1313 * check if someone quit or got killed in an unusual way
1314 */
1315 ret = waitpid(td->pid, &status, flags);
1316 if (ret < 0) {
1317 if (errno == ECHILD) {
1318 log_err("fio: pid=%d disappeared %d\n",
1319 (int) td->pid, td->runstate);
a5e371a6 1320 td->sig = ECHILD;
2e1df07d
JA		 1321 td_set_runstate(td, TD_REAPED);
1322 goto reaped;
1323 }
1324 perror("waitpid");
1325 } else if (ret == td->pid) {
1326 if (WIFSIGNALED(status)) {
1327 int sig = WTERMSIG(status);
1328
1329 if (sig != SIGTERM)
1330 log_err("fio: pid=%d, got signal=%d\n",
1331 (int) td->pid, sig);
a5e371a6 1332 td->sig = sig;
2e1df07d
JA		 1333 td_set_runstate(td, TD_REAPED);
1334 goto reaped;
1335 }
1336 if (WIFEXITED(status)) {
1337 if (WEXITSTATUS(status) && !td->error)
1338 td->error = WEXITSTATUS(status);
1339
1340 td_set_runstate(td, TD_REAPED);
1341 goto reaped;
1342 }
1343 }
1344
1345 /*
1346 * thread is not dead, continue
1347 */
1348 pending++;
1349 continue;
1350reaped:
1351 (*nr_running)--;
342f4be4
JA		 1352 (*m_rate) -= ddir_rw_sum(td->o.ratemin);
1353 (*t_rate) -= ddir_rw_sum(td->o.rate);
2e1df07d
JA		 1354 if (!td->pid)
1355 pending--;
1356
1357 if (td->error)
1358 exit_value++;
1359
1360 done_secs += mtime_since_now(&td->epoch) / 1000;
1361 }
1362
1363 if (*nr_running == cputhreads && !pending && realthreads)
1364 fio_terminate_threads(TERMINATE_ALL);
1365}
1366
2e1df07d
JA		 1367/*
1368 * Main function for kicking off and reaping jobs, as needed.
1369 */
1370static void run_threads(void)
1371{
1372 struct thread_data *td;
1373 unsigned long spent;
1374 unsigned int i, todo, nr_running, m_rate, t_rate, nr_started;
1375
1376 if (fio_pin_memory())
1377 return;
1378
1379 if (fio_gtod_offload && fio_start_gtod_thread())
1380 return;
1381
1382 set_sig_handlers();
1383
f3afa57e 1384 if (output_format == FIO_OUTPUT_NORMAL) {
2e1df07d
JA		 1385 log_info("Starting ");
1386 if (nr_thread)
1387 log_info("%d thread%s", nr_thread,
1388 nr_thread > 1 ? "s" : "");
1389 if (nr_process) {
1390 if (nr_thread)
1391 log_info(" and ");
1392 log_info("%d process%s", nr_process,
1393 nr_process > 1 ? "es" : "");
1394 }
1395 log_info("\n");
1396 fflush(stdout);
1397 }
1398
1399 todo = thread_number;
1400 nr_running = 0;
1401 nr_started = 0;
1402 m_rate = t_rate = 0;
1403
1404 for_each_td(td, i) {
1405 print_status_init(td->thread_number - 1);
1406
1407 if (!td->o.create_serialize)
1408 continue;
1409
1410 /*
1411 * do file setup here so it happens sequentially,
1412 * we don't want X number of threads getting their
1413 * client data interspersed on disk
1414 */
1415 if (setup_files(td)) {
1416 exit_value++;
1417 if (td->error)
1418 log_err("fio: pid=%d, err=%d/%s\n",
1419 (int) td->pid, td->error, td->verror);
1420 td_set_runstate(td, TD_REAPED);
1421 todo--;
1422 } else {
1423 struct fio_file *f;
1424 unsigned int j;
1425
1426 /*
1427 * for sharing to work, each job must always open
1428 * its own files. so close them, if we opened them
1429 * for creation
1430 */
1431 for_each_file(td, f, j) {
1432 if (fio_file_open(f))
1433 td_io_close_file(td, f);
1434 }
1435 }
1436 }
1437
1438 set_genesis_time();
1439
1440 while (todo) {
1441 struct thread_data *map[REAL_MAX_JOBS];
1442 struct timeval this_start;
1443 int this_jobs = 0, left;
1444
1445 /*
1446 * create threads (TD_NOT_CREATED -> TD_CREATED)
1447 */
1448 for_each_td(td, i) {
1449 if (td->runstate != TD_NOT_CREATED)
1450 continue;
1451
1452 /*
1453 * never got a chance to start, killed by other
1454 * thread for some reason
1455 */
1456 if (td->terminate) {
1457 todo--;
1458 continue;
1459 }
1460
1461 if (td->o.start_delay) {
1462 spent = mtime_since_genesis();
1463
1464 if (td->o.start_delay * 1000 > spent)
1465 continue;
1466 }
1467
1468 if (td->o.stonewall && (nr_started || nr_running)) {
1469 dprint(FD_PROCESS, "%s: stonewall wait\n",
1470 td->o.name);
1471 break;
1472 }
1473
1474 init_disk_util(td);
1475
1476 /*
1477 * Set state to created. Thread will transition
1478 * to TD_INITIALIZED when it's done setting up.
1479 */
1480 td_set_runstate(td, TD_CREATED);
1481 map[this_jobs++] = td;
1482 nr_started++;
1483
1484 if (td->o.use_thread) {
1485 int ret;
1486
1487 dprint(FD_PROCESS, "will pthread_create\n");
1488 ret = pthread_create(&td->thread, NULL,
1489 thread_main, td);
1490 if (ret) {
1491 log_err("pthread_create: %s\n",
1492 strerror(ret));
1493 nr_started--;
1494 break;
1495 }
1496 ret = pthread_detach(td->thread);
1497 if (ret)
1498 log_err("pthread_detach: %s",
1499 strerror(ret));
1500 } else {
1501 pid_t pid;
1502 dprint(FD_PROCESS, "will fork\n");
1503 pid = fork();
1504 if (!pid) {
1505 int ret = fork_main(shm_id, i);
1506
1507 _exit(ret);
1508 } else if (i == fio_debug_jobno)
1509 *fio_debug_jobp = pid;
1510 }
1511 dprint(FD_MUTEX, "wait on startup_mutex\n");
1512 if (fio_mutex_down_timeout(startup_mutex, 10)) {
1513 log_err("fio: job startup hung? exiting.\n");
1514 fio_terminate_threads(TERMINATE_ALL);
1515 fio_abort = 1;
1516 nr_started--;
1517 break;
1518 }
1519 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1520 }
1521
1522 /*
1523 * Wait for the started threads to transition to
1524 * TD_INITIALIZED.
1525 */
1526 fio_gettime(&this_start, NULL);
1527 left = this_jobs;
1528 while (left && !fio_abort) {
1529 if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1530 break;
1531
1532 usleep(100000);
1533
1534 for (i = 0; i < this_jobs; i++) {
1535 td = map[i];
1536 if (!td)
1537 continue;
1538 if (td->runstate == TD_INITIALIZED) {
1539 map[i] = NULL;
1540 left--;
1541 } else if (td->runstate >= TD_EXITED) {
1542 map[i] = NULL;
1543 left--;
1544 todo--;
1545 nr_running++; /* work-around... */
1546 }
1547 }
1548 }
1549
1550 if (left) {
4e87c37a
JA		 1551 log_err("fio: %d job%s failed to start\n", left,
1552 left > 1 ? "s" : "");
2e1df07d
JA		 1553 for (i = 0; i < this_jobs; i++) {
1554 td = map[i];
1555 if (!td)
1556 continue;
1557 kill(td->pid, SIGTERM);
1558 }
1559 break;
1560 }
1561
1562 /*
1563 * start created threads (TD_INITIALIZED -> TD_RUNNING).
1564 */
1565 for_each_td(td, i) {
1566 if (td->runstate != TD_INITIALIZED)
1567 continue;
1568
1569 if (in_ramp_time(td))
1570 td_set_runstate(td, TD_RAMP);
1571 else
1572 td_set_runstate(td, TD_RUNNING);
1573 nr_running++;
1574 nr_started--;
342f4be4
JA		 1575 m_rate += ddir_rw_sum(td->o.ratemin);
1576 t_rate += ddir_rw_sum(td->o.rate);
2e1df07d
JA		 1577 todo--;
1578 fio_mutex_up(td->mutex);
1579 }
1580
1581 reap_threads(&nr_running, &t_rate, &m_rate);
1582
1583 if (todo) {
1584 if (is_backend)
1585 fio_server_idle_loop();
1586 else
1587 usleep(100000);
1588 }
1589 }
1590
1591 while (nr_running) {
1592 reap_threads(&nr_running, &t_rate, &m_rate);
1593
1594 if (is_backend)
1595 fio_server_idle_loop();
1596 else
1597 usleep(10000);
1598 }
1599
1600 update_io_ticks();
1601 fio_unpin_memory();
1602}
1603
9ec7779f
JA		 1604void wait_for_disk_thread_exit(void)
1605{
1606 fio_mutex_down(disk_thread_mutex);
1607}
1608
2e1df07d
JA		 1609static void *disk_thread_main(void *data)
1610{
9ec7779f
JA		 1611 int ret = 0;
1612
2e1df07d
JA		 1613 fio_mutex_up(startup_mutex);
1614
9ec7779f 1615 while (threads && !ret) {
2e1df07d
JA		 1616 usleep(DISK_UTIL_MSEC * 1000);
1617 if (!threads)
1618 break;
9ec7779f 1619 ret = update_io_ticks();
2e1df07d
JA		 1620
1621 if (!is_backend)
1622 print_thread_status();
1623 }
1624
9ec7779f 1625 fio_mutex_up(disk_thread_mutex);
2e1df07d
JA		 1626 return NULL;
1627}
1628
1629static int create_disk_util_thread(void)
1630{
1631 int ret;
1632
9ec7779f
JA		 1633 setup_disk_util();
1634
521da527 1635 disk_thread_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
9ec7779f 1636
2e1df07d
JA		 1637 ret = pthread_create(&disk_util_thread, NULL, disk_thread_main, NULL);
1638 if (ret) {
9ec7779f 1639 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1640 log_err("Can't create disk util thread: %s\n", strerror(ret));
1641 return 1;
1642 }
1643
1644 ret = pthread_detach(disk_util_thread);
1645 if (ret) {
9ec7779f 1646 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1647 log_err("Can't detatch disk util thread: %s\n", strerror(ret));
1648 return 1;
1649 }
1650
1651 dprint(FD_MUTEX, "wait on startup_mutex\n");
1652 fio_mutex_down(startup_mutex);
1653 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1654 return 0;
1655}
1656
2e1df07d
JA		 1657int fio_backend(void)
1658{
1659 struct thread_data *td;
1660 int i;
1661
1662 if (exec_profile) {
1663 if (load_profile(exec_profile))
1664 return 1;
1665 free(exec_profile);
1666 exec_profile = NULL;
1667 }
1668 if (!thread_number)
1669 return 0;
1670
1671 if (write_bw_log) {
1672 setup_log(&agg_io_log[DDIR_READ], 0);
1673 setup_log(&agg_io_log[DDIR_WRITE], 0);
6eaf09d6 1674 setup_log(&agg_io_log[DDIR_TRIM], 0);
2e1df07d
JA		 1675 }
1676
521da527 1677 startup_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
2e1df07d
JA		 1678 if (startup_mutex == NULL)
1679 return 1;
521da527 1680 writeout_mutex = fio_mutex_init(FIO_MUTEX_UNLOCKED);
2e1df07d
JA		 1681 if (writeout_mutex == NULL)
1682 return 1;
1683
1684 set_genesis_time();
1685 create_disk_util_thread();
1686
1687 cgroup_list = smalloc(sizeof(*cgroup_list));
1688 INIT_FLIST_HEAD(cgroup_list);
1689
1690 run_threads();
1691
1692 if (!fio_abort) {
1693 show_run_stats();
1694 if (write_bw_log) {
1695 __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1696 __finish_log(agg_io_log[DDIR_WRITE],
1697 "agg-write_bw.log");
6eaf09d6
SL		 1698 __finish_log(agg_io_log[DDIR_TRIM],
1699 "agg-write_bw.log");
2e1df07d
JA		 1700 }
1701 }
1702
1703 for_each_td(td, i)
1704 fio_options_free(td);
1705
a462baef 1706 free_disk_util();
2e1df07d
JA		 1707 cgroup_kill(cgroup_list);
1708 sfree(cgroup_list);
1709 sfree(cgroup_mnt);
1710
1711 fio_mutex_remove(startup_mutex);
1712 fio_mutex_remove(writeout_mutex);
9ec7779f 1713 fio_mutex_remove(disk_thread_mutex);
2e1df07d
JA		 1714 return exit_value;
1715}
fio - Flexible IO Tester