Merge branch 'master' of ssh://router/data/git/fio
[fio.git] / fio.c
CommitLineData
ebac4655
JA
1/*
2 * fio - the flexible io tester
3 *
4 * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
aae22ca7 5 * Copyright (C) 2006 Jens Axboe <axboe@kernel.dk>
ebac4655 6 *
8e9fe637
JA
7 * The license below covers all files distributed with fio unless otherwise
8 * noted in the file itself.
9 *
ebac4655 10 * This program is free software; you can redistribute it and/or modify
8e9fe637
JA
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
ebac4655
JA
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 */
ebac4655
JA
24#include <unistd.h>
25#include <fcntl.h>
26#include <string.h>
ebac4655
JA
27#include <signal.h>
28#include <time.h>
dbe1125e 29#include <locale.h>
36167d82 30#include <assert.h>
ebac4655
JA
31#include <sys/stat.h>
32#include <sys/wait.h>
33#include <sys/ipc.h>
34#include <sys/shm.h>
ebac4655
JA
35#include <sys/mman.h>
36
37#include "fio.h"
210f43b3 38#include "hash.h"
2e5cdb11 39#include "smalloc.h"
4f5af7b2 40#include "verify.h"
7c9b1bce 41#include "diskutil.h"
ebac4655 42
cfc99db7
JA
43unsigned long page_mask;
44unsigned long page_size;
d529ee19
JA
45
46#define PAGE_ALIGN(buf) \
29d610e1 47 (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
ebac4655
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48
49int groupid = 0;
50int thread_number = 0;
9cedf167
JA
51int nr_process = 0;
52int nr_thread = 0;
ebac4655 53int shm_id = 0;
53cdc686 54int temp_stall_ts;
d3eeeabc 55unsigned long done_secs = 0;
ebac4655 56
cdd18ad8 57static struct fio_mutex *startup_mutex;
d2bbb8d9 58static struct fio_mutex *writeout_mutex;
6ce15a32 59static volatile int fio_abort;
437c9b71 60static int exit_value;
ccb0fa24 61static struct itimerval itimer;
be4ecfdf 62static pthread_t gtod_thread;
ebac4655 63
bb3884d8
JA
64struct io_log *agg_io_log[2];
65
ebac4655 66#define TERMINATE_ALL (-1)
75154845 67#define JOB_START_TIMEOUT (5 * 1000)
ebac4655 68
b29ee5b3 69void td_set_runstate(struct thread_data *td, int runstate)
6ce15a32 70{
d8fab1b6
JA
71 if (td->runstate == runstate)
72 return;
73
5921e80c
JA
74 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
75 td->runstate, runstate);
6ce15a32
JA
76 td->runstate = runstate;
77}
78
390c40e2 79static void terminate_threads(int group_id)
ebac4655 80{
34572e28 81 struct thread_data *td;
ebac4655
JA
82 int i;
83
6f88bcb0
JA
84 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
85
34572e28 86 for_each_td(td, i) {
ebac4655 87 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
6f88bcb0 88 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
5921e80c 89 td->o.name, (int) td->pid);
ad830ed7
JA
90 td->terminate = 1;
91 td->o.start_delay = 0;
92
7a93ab19
JA
93 /*
94 * if the thread is running, just let it exit
95 */
96 if (td->runstate < TD_RUNNING)
c1302d44 97 kill(td->pid, SIGQUIT);
f63f7f3b
JA
98 else {
99 struct ioengine_ops *ops = td->io_ops;
100
101 if (ops && (ops->flags & FIO_SIGQUIT))
102 kill(td->pid, SIGQUIT);
103 }
ebac4655
JA
104 }
105 }
106}
107
ccb0fa24
JA
108static void status_timer_arm(void)
109{
110 itimer.it_value.tv_sec = 0;
111 itimer.it_value.tv_usec = DISK_UTIL_MSEC * 1000;
112 setitimer(ITIMER_REAL, &itimer, NULL);
113}
114
02444ad1 115static void sig_alrm(int fio_unused sig)
ebac4655 116{
697a606c 117 if (threads) {
5ec10eaa 118 update_io_ticks();
5ec10eaa 119 print_thread_status();
ccb0fa24 120 status_timer_arm();
697a606c
JA
121 }
122}
123
5f8f9726
JA
124/*
125 * Happens on thread runs with ctrl-c, ignore our own SIGQUIT
126 */
127static void sig_quit(int sig)
128{
129}
130
697a606c
JA
131static void sig_int(int sig)
132{
133 if (threads) {
5ec10eaa
JA
134 printf("\nfio: terminating on signal %d\n", sig);
135 fflush(stdout);
136 terminate_threads(TERMINATE_ALL);
ebac4655
JA
137 }
138}
139
02444ad1 140static void sig_ill(int fio_unused sig)
de79c915
JA
141{
142 if (!threads)
143 return;
144
145 log_err("fio: illegal instruction. your cpu does not support "
146 "the sse4.2 instruction for crc32c\n");
147 terminate_threads(TERMINATE_ALL);
148 exit(4);
149}
150
697a606c
JA
151static void set_sig_handlers(void)
152{
153 struct sigaction act;
154
155 memset(&act, 0, sizeof(act));
156 act.sa_handler = sig_alrm;
157 act.sa_flags = SA_RESTART;
158 sigaction(SIGALRM, &act, NULL);
159
160 memset(&act, 0, sizeof(act));
161 act.sa_handler = sig_int;
162 act.sa_flags = SA_RESTART;
163 sigaction(SIGINT, &act, NULL);
de79c915
JA
164
165 memset(&act, 0, sizeof(act));
166 act.sa_handler = sig_ill;
167 act.sa_flags = SA_RESTART;
168 sigaction(SIGILL, &act, NULL);
5f8f9726
JA
169
170 memset(&act, 0, sizeof(act));
171 act.sa_handler = sig_quit;
172 act.sa_flags = SA_RESTART;
173 sigaction(SIGQUIT, &act, NULL);
697a606c
JA
174}
175
906c8d75
JA
176/*
177 * Check if we are above the minimum rate given.
178 */
581e7141
JA
179static int __check_min_rate(struct thread_data *td, struct timeval *now,
180 enum td_ddir ddir)
ebac4655 181{
0904200b 182 unsigned long long bytes = 0;
4e991c23 183 unsigned long iops = 0;
ebac4655
JA
184 unsigned long spent;
185 unsigned long rate;
581e7141
JA
186 unsigned int ratemin = 0;
187 unsigned int rate_iops = 0;
188 unsigned int rate_iops_min = 0;
ebac4655 189
d982d873
JA
190 if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
191 return 0;
192
ebac4655
JA
193 /*
194 * allow a 2 second settle period in the beginning
195 */
196 if (mtime_since(&td->start, now) < 2000)
197 return 0;
198
581e7141
JA
199 iops += td->io_blocks[ddir];
200 bytes += td->this_io_bytes[ddir];
201 ratemin += td->o.ratemin[ddir];
202 rate_iops += td->o.rate_iops[ddir];
203 rate_iops_min += td->o.rate_iops_min[ddir];
0904200b 204
ebac4655
JA
205 /*
206 * if rate blocks is set, sample is running
207 */
581e7141
JA
208 if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
209 spent = mtime_since(&td->lastrate[ddir], now);
2dc1bbeb 210 if (spent < td->o.ratecycle)
ebac4655
JA
211 return 0;
212
581e7141 213 if (td->o.rate[ddir]) {
4e991c23
JA
214 /*
215 * check bandwidth specified rate
216 */
581e7141 217 if (bytes < td->rate_bytes[ddir]) {
5ec10eaa 218 log_err("%s: min rate %u not met\n", td->o.name,
581e7141 219 ratemin);
4e991c23
JA
220 return 1;
221 } else {
581e7141
JA
222 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
223 if (rate < ratemin ||
224 bytes < td->rate_bytes[ddir]) {
5ec10eaa 225 log_err("%s: min rate %u not met, got"
b22989b9 226 " %luKB/sec\n", td->o.name,
581e7141 227 ratemin, rate);
4e991c23
JA
228 return 1;
229 }
230 }
413dd459 231 } else {
4e991c23
JA
232 /*
233 * checks iops specified rate
234 */
581e7141 235 if (iops < rate_iops) {
5ec10eaa 236 log_err("%s: min iops rate %u not met\n",
581e7141 237 td->o.name, rate_iops);
413dd459 238 return 1;
4e991c23 239 } else {
581e7141
JA
240 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
241 if (rate < rate_iops_min ||
242 iops < td->rate_blocks[ddir]) {
5ec10eaa
JA
243 log_err("%s: min iops rate %u not met,"
244 " got %lu\n", td->o.name,
581e7141 245 rate_iops_min, rate);
4e991c23 246 }
413dd459 247 }
ebac4655
JA
248 }
249 }
250
581e7141
JA
251 td->rate_bytes[ddir] = bytes;
252 td->rate_blocks[ddir] = iops;
253 memcpy(&td->lastrate[ddir], now, sizeof(*now));
ebac4655
JA
254 return 0;
255}
256
581e7141
JA
257static int check_min_rate(struct thread_data *td, struct timeval *now,
258 unsigned long *bytes_done)
259{
260 int ret = 0;
261
262 if (bytes_done[0])
263 ret |= __check_min_rate(td, now, 0);
264 if (bytes_done[1])
265 ret |= __check_min_rate(td, now, 1);
266
267 return ret;
268}
269
ebac4655
JA
270static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
271{
2dc1bbeb 272 if (!td->o.timeout)
ebac4655 273 return 0;
2dc1bbeb 274 if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
ebac4655
JA
275 return 1;
276
277 return 0;
278}
279
906c8d75
JA
280/*
281 * When job exits, we can cancel the in-flight IO if we are using async
282 * io. Attempt to do so.
283 */
ebac4655
JA
284static void cleanup_pending_aio(struct thread_data *td)
285{
01743ee1 286 struct flist_head *entry, *n;
ebac4655
JA
287 struct io_u *io_u;
288 int r;
289
290 /*
291 * get immediately available events, if any
292 */
581e7141 293 r = io_u_queued_complete(td, 0, NULL);
b2fdda43
JA
294 if (r < 0)
295 return;
ebac4655
JA
296
297 /*
298 * now cancel remaining active events
299 */
2866c82d 300 if (td->io_ops->cancel) {
01743ee1
JA
301 flist_for_each_safe(entry, n, &td->io_u_busylist) {
302 io_u = flist_entry(entry, struct io_u, list);
ebac4655 303
0c6e7517
JA
304 /*
305 * if the io_u isn't in flight, then that generally
306 * means someone leaked an io_u. complain but fix
307 * it up, so we don't stall here.
308 */
309 if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
310 log_err("fio: non-busy IO on busy list\n");
ebac4655 311 put_io_u(td, io_u);
0c6e7517
JA
312 } else {
313 r = td->io_ops->cancel(td, io_u);
314 if (!r)
315 put_io_u(td, io_u);
316 }
ebac4655
JA
317 }
318 }
319
97601024 320 if (td->cur_depth)
581e7141 321 r = io_u_queued_complete(td, td->cur_depth, NULL);
ebac4655
JA
322}
323
858a3d47
JA
324/*
325 * Helper to handle the final sync of a file. Works just like the normal
326 * io path, just does everything sync.
327 */
328static int fio_io_sync(struct thread_data *td, struct fio_file *f)
329{
330 struct io_u *io_u = __get_io_u(td);
858a3d47
JA
331 int ret;
332
333 if (!io_u)
334 return 1;
335
336 io_u->ddir = DDIR_SYNC;
337 io_u->file = f;
338
339 if (td_io_prep(td, io_u)) {
340 put_io_u(td, io_u);
341 return 1;
342 }
343
755200a3 344requeue:
858a3d47 345 ret = td_io_queue(td, io_u);
36167d82 346 if (ret < 0) {
e1161c32 347 td_verror(td, io_u->error, "td_io_queue");
858a3d47 348 put_io_u(td, io_u);
858a3d47 349 return 1;
36167d82 350 } else if (ret == FIO_Q_QUEUED) {
581e7141 351 if (io_u_queued_complete(td, 1, NULL) < 0)
36167d82 352 return 1;
36167d82
JA
353 } else if (ret == FIO_Q_COMPLETED) {
354 if (io_u->error) {
e1161c32 355 td_verror(td, io_u->error, "td_io_queue");
36167d82
JA
356 return 1;
357 }
858a3d47 358
581e7141 359 if (io_u_sync_complete(td, io_u, NULL) < 0)
b2fdda43 360 return 1;
755200a3
JA
361 } else if (ret == FIO_Q_BUSY) {
362 if (td_io_commit(td))
363 return 1;
364 goto requeue;
858a3d47
JA
365 }
366
367 return 0;
368}
369
993bf48b
JA
370static inline void update_tv_cache(struct thread_data *td)
371{
372 if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
373 fio_gettime(&td->tv_cache, NULL);
374}
375
f2bba182
RR
376static int break_on_this_error(struct thread_data *td, int *retptr)
377{
378 int ret = *retptr;
379
380 if (ret < 0 || td->error) {
381 int err;
382
1ec99eea
JA
383 if (!td->o.continue_on_error)
384 return 1;
f2bba182
RR
385
386 if (ret < 0)
387 err = -ret;
388 else
389 err = td->error;
390
f2bba182
RR
391 if (td_non_fatal_error(err)) {
392 /*
393 * Continue with the I/Os in case of
394 * a non fatal error.
395 */
8a4f8a24 396 update_error_count(td, err);
f2bba182
RR
397 td_clear_error(td);
398 *retptr = 0;
399 return 0;
8a4f8a24
RR
400 } else if (td->o.fill_device && err == ENOSPC) {
401 /*
402 * We expect to hit this error if
403 * fill_device option is set.
404 */
405 td_clear_error(td);
406 td->terminate = 1;
407 return 1;
f2bba182
RR
408 } else {
409 /*
410 * Stop the I/O in case of a fatal
411 * error.
412 */
8a4f8a24 413 update_error_count(td, err);
f2bba182
RR
414 return 1;
415 }
416 }
417
418 return 0;
419}
420
906c8d75 421/*
34403fb1 422 * The main verify engine. Runs over the writes we previously submitted,
906c8d75
JA
423 * reads the blocks back in, and checks the crc/md5 of the data.
424 */
1e97cce9 425static void do_verify(struct thread_data *td)
ebac4655 426{
53cdc686 427 struct fio_file *f;
36167d82 428 struct io_u *io_u;
af52b345
JA
429 int ret, min_events;
430 unsigned int i;
e5b401d4
JA
431
432 /*
433 * sync io first and invalidate cache, to make sure we really
434 * read from disk.
435 */
436 for_each_file(td, f, i) {
d6aed795 437 if (!fio_file_open(f))
3d7b485f 438 continue;
b2fdda43
JA
439 if (fio_io_sync(td, f))
440 break;
441 if (file_invalidate_cache(td, f))
442 break;
e5b401d4 443 }
ebac4655 444
b2fdda43
JA
445 if (td->error)
446 return;
447
ebac4655
JA
448 td_set_runstate(td, TD_VERIFYING);
449
36167d82
JA
450 io_u = NULL;
451 while (!td->terminate) {
4950421a 452 int ret2, full;
5451792e 453
993bf48b
JA
454 update_tv_cache(td);
455
456 if (runtime_exceeded(td, &td->tv_cache)) {
90a87d4b 457 td->terminate = 1;
02bcaa8c 458 break;
069c2918 459 }
02bcaa8c 460
dcb4830d
RR
461 io_u = __get_io_u(td);
462 if (!io_u)
463 break;
464
069c2918
JA
465 if (get_next_verify(td, io_u)) {
466 put_io_u(td, io_u);
ebac4655 467 break;
069c2918 468 }
ebac4655 469
069c2918
JA
470 if (td_io_prep(td, io_u)) {
471 put_io_u(td, io_u);
53cdc686 472 break;
069c2918 473 }
d7762cf8 474
e8462bd8
JA
475 if (td->o.verify_async)
476 io_u->end_io = verify_io_u_async;
477 else
478 io_u->end_io = verify_io_u;
53cdc686 479
11786802 480 ret = td_io_queue(td, io_u);
36167d82
JA
481 switch (ret) {
482 case FIO_Q_COMPLETED:
f2bba182 483 if (io_u->error) {
22819ec2 484 ret = -io_u->error;
f2bba182
RR
485 clear_io_u(td, io_u);
486 } else if (io_u->resid) {
36167d82 487 int bytes = io_u->xfer_buflen - io_u->resid;
d460eb31 488 struct fio_file *f = io_u->file;
ebac4655 489
9e9d164e
JA
490 /*
491 * zero read, fail
492 */
493 if (!bytes) {
41d9f0fd 494 td_verror(td, EIO, "full resid");
9e9d164e
JA
495 put_io_u(td, io_u);
496 break;
497 }
8400d9b2 498
36167d82
JA
499 io_u->xfer_buflen = io_u->resid;
500 io_u->xfer_buf += bytes;
8400d9b2
JA
501 io_u->offset += bytes;
502
30061b97
JA
503 td->ts.short_io_u[io_u->ddir]++;
504
d460eb31 505 if (io_u->offset == f->real_file_size)
8400d9b2
JA
506 goto sync_done;
507
11786802
JA
508 requeue_io_u(td, &io_u);
509 } else {
8400d9b2 510sync_done:
581e7141 511 ret = io_u_sync_complete(td, io_u, NULL);
11786802
JA
512 if (ret < 0)
513 break;
36167d82 514 }
36167d82
JA
515 continue;
516 case FIO_Q_QUEUED:
517 break;
755200a3
JA
518 case FIO_Q_BUSY:
519 requeue_io_u(td, &io_u);
5451792e
JA
520 ret2 = td_io_commit(td);
521 if (ret2 < 0)
522 ret = ret2;
755200a3 523 break;
36167d82
JA
524 default:
525 assert(ret < 0);
e1161c32 526 td_verror(td, -ret, "td_io_queue");
ebac4655
JA
527 break;
528 }
529
f2bba182 530 if (break_on_this_error(td, &ret))
3af6ef39
JA
531 break;
532
ebac4655 533 /*
3af6ef39
JA
534 * if we can queue more, do so. but check if there are
535 * completed io_u's first.
ebac4655 536 */
4950421a
JA
537 full = queue_full(td) || ret == FIO_Q_BUSY;
538 if (full || !td->o.iodepth_batch_complete) {
539 min_events = td->o.iodepth_batch_complete;
540 if (full && !min_events)
838bc709 541 min_events = 1;
e916b390 542
4950421a
JA
543 do {
544 /*
545 * Reap required number of io units, if any,
546 * and do the verification on them through
547 * the callback handler
548 */
581e7141 549 if (io_u_queued_complete(td, min_events, NULL) < 0) {
4950421a
JA
550 ret = -1;
551 break;
552 }
553 } while (full && (td->cur_depth > td->o.iodepth_low));
554 }
555 if (ret < 0)
ebac4655 556 break;
36167d82 557 }
ebac4655 558
c01c0395
JA
559 if (!td->error) {
560 min_events = td->cur_depth;
561
562 if (min_events)
581e7141 563 ret = io_u_queued_complete(td, min_events, NULL);
c01c0395 564 } else
ebac4655
JA
565 cleanup_pending_aio(td);
566
567 td_set_runstate(td, TD_RUNNING);
568}
569
32cd46a0 570/*
906c8d75 571 * Main IO worker function. It retrieves io_u's to process and queues
32cd46a0
JA
572 * and reaps them, checking for rate and errors along the way.
573 */
ebac4655
JA
574static void do_io(struct thread_data *td)
575{
af52b345
JA
576 unsigned int i;
577 int ret = 0;
ebac4655 578
b29ee5b3
JA
579 if (in_ramp_time(td))
580 td_set_runstate(td, TD_RAMP);
581 else
582 td_set_runstate(td, TD_RUNNING);
5853e5a8 583
7bb48f84 584 while ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) {
97601024 585 struct timeval comp_time;
581e7141 586 unsigned long bytes_done[2] = { 0, 0 };
84585003 587 int min_evts = 0;
ebac4655 588 struct io_u *io_u;
4950421a 589 int ret2, full;
ebac4655
JA
590
591 if (td->terminate)
592 break;
593
993bf48b 594 update_tv_cache(td);
97601024 595
993bf48b 596 if (runtime_exceeded(td, &td->tv_cache)) {
90a87d4b 597 td->terminate = 1;
97601024
JA
598 break;
599 }
36167d82 600
dcb4830d
RR
601 io_u = get_io_u(td);
602 if (!io_u)
603 break;
604
b67740d3
JA
605 /*
606 * Add verification end_io handler, if asked to verify
607 * a previously written file.
608 */
cc3fc855 609 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ) {
e8462bd8
JA
610 if (td->o.verify_async)
611 io_u->end_io = verify_io_u_async;
612 else
613 io_u->end_io = verify_io_u;
d8fab1b6 614 td_set_runstate(td, TD_VERIFYING);
b29ee5b3
JA
615 } else if (in_ramp_time(td))
616 td_set_runstate(td, TD_RAMP);
617 else
d8fab1b6 618 td_set_runstate(td, TD_RUNNING);
b67740d3 619
11786802 620 ret = td_io_queue(td, io_u);
36167d82
JA
621 switch (ret) {
622 case FIO_Q_COMPLETED:
f2bba182 623 if (io_u->error) {
5451792e 624 ret = -io_u->error;
f2bba182
RR
625 clear_io_u(td, io_u);
626 } else if (io_u->resid) {
36167d82 627 int bytes = io_u->xfer_buflen - io_u->resid;
d460eb31 628 struct fio_file *f = io_u->file;
36167d82 629
9e9d164e
JA
630 /*
631 * zero read, fail
632 */
633 if (!bytes) {
41d9f0fd 634 td_verror(td, EIO, "full resid");
9e9d164e
JA
635 put_io_u(td, io_u);
636 break;
637 }
638
cec6b55d 639 io_u->xfer_buflen = io_u->resid;
36167d82 640 io_u->xfer_buf += bytes;
5a7c5680
JA
641 io_u->offset += bytes;
642
30061b97
JA
643 td->ts.short_io_u[io_u->ddir]++;
644
d460eb31 645 if (io_u->offset == f->real_file_size)
5a7c5680
JA
646 goto sync_done;
647
11786802
JA
648 requeue_io_u(td, &io_u);
649 } else {
5a7c5680 650sync_done:
581e7141
JA
651 if (__should_check_rate(td, 0) ||
652 __should_check_rate(td, 1))
993bf48b
JA
653 fio_gettime(&comp_time, NULL);
654
581e7141
JA
655 ret = io_u_sync_complete(td, io_u, bytes_done);
656 if (ret < 0)
657 break;
cec6b55d 658 }
36167d82
JA
659 break;
660 case FIO_Q_QUEUED:
7e77dd02
JA
661 /*
662 * if the engine doesn't have a commit hook,
663 * the io_u is really queued. if it does have such
664 * a hook, it has to call io_u_queued() itself.
665 */
666 if (td->io_ops->commit == NULL)
667 io_u_queued(td, io_u);
36167d82 668 break;
755200a3
JA
669 case FIO_Q_BUSY:
670 requeue_io_u(td, &io_u);
5451792e
JA
671 ret2 = td_io_commit(td);
672 if (ret2 < 0)
673 ret = ret2;
755200a3 674 break;
36167d82
JA
675 default:
676 assert(ret < 0);
677 put_io_u(td, io_u);
678 break;
ebac4655
JA
679 }
680
f2bba182 681 if (break_on_this_error(td, &ret))
36167d82
JA
682 break;
683
97601024
JA
684 /*
685 * See if we need to complete some commands
686 */
4950421a
JA
687 full = queue_full(td) || ret == FIO_Q_BUSY;
688 if (full || !td->o.iodepth_batch_complete) {
689 min_evts = td->o.iodepth_batch_complete;
690 if (full && !min_evts)
36167d82 691 min_evts = 1;
4950421a 692
581e7141
JA
693 if (__should_check_rate(td, 0) ||
694 __should_check_rate(td, 1))
993bf48b 695 fio_gettime(&comp_time, NULL);
4950421a
JA
696
697 do {
581e7141
JA
698 ret = io_u_queued_complete(td, min_evts, bytes_done);
699 if (ret < 0)
4950421a
JA
700 break;
701
4950421a 702 } while (full && (td->cur_depth > td->o.iodepth_low));
ebac4655
JA
703 }
704
4950421a
JA
705 if (ret < 0)
706 break;
581e7141 707 if (!(bytes_done[0] + bytes_done[1]))
97601024
JA
708 continue;
709
581e7141
JA
710 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
711 if (check_min_rate(td, &comp_time, bytes_done)) {
721938ae
JA
712 if (exitall_on_terminate)
713 terminate_threads(td->groupid);
714 td_verror(td, EIO, "check_min_rate");
715 break;
716 }
ebac4655
JA
717 }
718
2dc1bbeb 719 if (td->o.thinktime) {
9c1f7434
JA
720 unsigned long long b;
721
722 b = td->io_blocks[0] + td->io_blocks[1];
2dc1bbeb 723 if (!(b % td->o.thinktime_blocks)) {
48097d5c
JA
724 int left;
725
2dc1bbeb 726 if (td->o.thinktime_spin)
6dd6f2cd 727 usec_spin(td->o.thinktime_spin);
48097d5c 728
2dc1bbeb 729 left = td->o.thinktime - td->o.thinktime_spin;
48097d5c
JA
730 if (left)
731 usec_sleep(td, left);
732 }
9c1f7434 733 }
ebac4655
JA
734 }
735
aa31f1f1
SL
736 if (td->o.fill_device && td->error == ENOSPC) {
737 td->error = 0;
738 td->terminate = 1;
739 }
4d2413c6 740 if (!td->error) {
3d7c391d
JA
741 struct fio_file *f;
742
c01c0395
JA
743 i = td->cur_depth;
744 if (i)
581e7141 745 ret = io_u_queued_complete(td, i, NULL);
ebac4655 746
2dc1bbeb 747 if (should_fsync(td) && td->o.end_fsync) {
84585003 748 td_set_runstate(td, TD_FSYNCING);
3d7b485f
JA
749
750 for_each_file(td, f, i) {
d6aed795 751 if (!fio_file_open(f))
3d7b485f 752 continue;
858a3d47 753 fio_io_sync(td, f);
3d7b485f 754 }
84585003 755 }
c01c0395
JA
756 } else
757 cleanup_pending_aio(td);
2ba1c290
JA
758
759 /*
760 * stop job if we failed doing any IO
761 */
762 if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
763 td->done = 1;
ebac4655
JA
764}
765
ebac4655
JA
766static void cleanup_io_u(struct thread_data *td)
767{
01743ee1 768 struct flist_head *entry, *n;
ebac4655
JA
769 struct io_u *io_u;
770
01743ee1
JA
771 flist_for_each_safe(entry, n, &td->io_u_freelist) {
772 io_u = flist_entry(entry, struct io_u, list);
ebac4655 773
01743ee1 774 flist_del(&io_u->list);
ebac4655
JA
775 free(io_u);
776 }
777
2f9ade3c 778 free_io_mem(td);
ebac4655
JA
779}
780
781static int init_io_u(struct thread_data *td)
782{
783 struct io_u *io_u;
a00735e6 784 unsigned int max_bs;
eb7ccf38 785 int cl_align, i, max_units;
ebac4655
JA
786 char *p;
787
1e3c09af 788 max_units = td->o.iodepth;
2dc1bbeb 789 max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
5ec10eaa
JA
790 td->orig_buffer_size = (unsigned long long) max_bs
791 * (unsigned long long) max_units;
792
793 if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
794 unsigned long bs;
74b025b0 795
5ec10eaa
JA
796 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
797 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
798 }
ebac4655 799
c3990645
JA
800 if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
801 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
802 return 1;
803 }
804
2f9ade3c
JA
805 if (allocate_io_mem(td))
806 return 1;
ebac4655 807
fc966bef 808 if (td->o.odirect || td->o.mem_align)
d529ee19 809 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
b3f378e9
JA
810 else
811 p = td->orig_buffer;
812
eb7ccf38
JA
813 cl_align = os_cache_line_size();
814
ebac4655 815 for (i = 0; i < max_units; i++) {
eb7ccf38
JA
816 void *ptr;
817
db1cd90b
JA
818 if (td->terminate)
819 return 1;
eb7ccf38
JA
820
821 if (posix_memalign(&ptr, cl_align, sizeof(*io_u))) {
822 log_err("fio: posix_memalign=%s\n", strerror(errno));
823 break;
824 }
825
826 io_u = ptr;
ebac4655 827 memset(io_u, 0, sizeof(*io_u));
01743ee1 828 INIT_FLIST_HEAD(&io_u->list);
d529ee19 829 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
ebac4655 830
b4c5e1ac
JA
831 if (!(td->io_ops->flags & FIO_NOIO)) {
832 io_u->buf = p + max_bs * i;
d529ee19 833 dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
e9459e5a 834
5973cafb
JA
835 if (td_write(td) && !td->o.refill_buffers)
836 io_u_fill_buffer(td, io_u, max_bs);
b4c5e1ac 837 }
6b9cea23 838
b1ff3403 839 io_u->index = i;
0c6e7517 840 io_u->flags = IO_U_F_FREE;
01743ee1 841 flist_add(&io_u->list, &td->io_u_freelist);
ebac4655
JA
842 }
843
844 return 0;
845}
846
da86774e
JA
847static int switch_ioscheduler(struct thread_data *td)
848{
849 char tmp[256], tmp2[128];
850 FILE *f;
851 int ret;
852
ba0fbe10 853 if (td->io_ops->flags & FIO_DISKLESSIO)
f48b467c
JA
854 return 0;
855
da86774e
JA
856 sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
857
858 f = fopen(tmp, "r+");
859 if (!f) {
cbf5c1d7 860 if (errno == ENOENT) {
5ec10eaa
JA
861 log_err("fio: os or kernel doesn't support IO scheduler"
862 " switching\n");
cbf5c1d7
JA
863 return 0;
864 }
865 td_verror(td, errno, "fopen iosched");
da86774e
JA
866 return 1;
867 }
868
869 /*
870 * Set io scheduler.
871 */
2dc1bbeb 872 ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
da86774e 873 if (ferror(f) || ret != 1) {
e1161c32 874 td_verror(td, errno, "fwrite");
da86774e
JA
875 fclose(f);
876 return 1;
877 }
878
879 rewind(f);
880
881 /*
882 * Read back and check that the selected scheduler is now the default.
883 */
884 ret = fread(tmp, 1, sizeof(tmp), f);
885 if (ferror(f) || ret < 0) {
e1161c32 886 td_verror(td, errno, "fread");
da86774e
JA
887 fclose(f);
888 return 1;
889 }
890
2dc1bbeb 891 sprintf(tmp2, "[%s]", td->o.ioscheduler);
da86774e 892 if (!strstr(tmp, tmp2)) {
2dc1bbeb 893 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
e1161c32 894 td_verror(td, EINVAL, "iosched_switch");
da86774e
JA
895 fclose(f);
896 return 1;
897 }
898
899 fclose(f);
900 return 0;
901}
902
492158cf
JA
903static int keep_running(struct thread_data *td)
904{
905 unsigned long long io_done;
906
20e354ef
JA
907 if (td->done)
908 return 0;
492158cf
JA
909 if (td->o.time_based)
910 return 1;
911 if (td->o.loops) {
912 td->o.loops--;
913 return 1;
914 }
915
5ec10eaa
JA
916 io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
917 + td->io_skip_bytes;
492158cf
JA
918 if (io_done < td->o.size)
919 return 1;
920
921 return 0;
922}
923
b29ee5b3 924static void reset_io_counters(struct thread_data *td)
ebac4655 925{
756867bd 926 td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
ebac4655 927 td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
20dc95c4 928 td->zone_bytes = 0;
581e7141
JA
929 td->rate_bytes[0] = td->rate_bytes[1] = 0;
930 td->rate_blocks[0] = td->rate_blocks[1] = 0;
ebac4655 931
c1324df1
JA
932 td->last_was_sync = 0;
933
2ba1c290
JA
934 /*
935 * reset file done count if we are to start over
936 */
937 if (td->o.time_based || td->o.loops)
48f5abd3 938 td->nr_done_files = 0;
5bfc35d7
JA
939
940 /*
941 * Set the same seed to get repeatable runs
942 */
943 td_fill_rand_seeds(td);
b29ee5b3
JA
944}
945
946void reset_all_stats(struct thread_data *td)
947{
948 struct timeval tv;
949 int i;
950
951 reset_io_counters(td);
952
953 for (i = 0; i < 2; i++) {
954 td->io_bytes[i] = 0;
955 td->io_blocks[i] = 0;
956 td->io_issues[i] = 0;
957 td->ts.total_io_u[i] = 0;
958 }
959
960 fio_gettime(&tv, NULL);
961 memcpy(&td->epoch, &tv, sizeof(tv));
962 memcpy(&td->start, &tv, sizeof(tv));
963}
964
df9c26b1 965static void clear_io_state(struct thread_data *td)
b29ee5b3
JA
966{
967 struct fio_file *f;
968 unsigned int i;
b29ee5b3
JA
969
970 reset_io_counters(td);
281f9b63 971
24ffd2c2 972 close_files(td);
df9c26b1 973 for_each_file(td, f, i)
d6aed795 974 fio_file_clear_done(f);
ebac4655
JA
975}
976
398e8c4d
JA
977static int exec_string(const char *string)
978{
979 int ret, newlen = strlen(string) + 1 + 8;
980 char *str;
981
982 str = malloc(newlen);
983 sprintf(str, "sh -c %s", string);
984
985 ret = system(str);
986 if (ret == -1)
987 log_err("fio: exec of cmd <%s> failed\n", str);
988
989 free(str);
990 return ret;
991}
992
906c8d75
JA
993/*
994 * Entry point for the thread based jobs. The process based jobs end up
995 * here as well, after a little setup.
996 */
ebac4655
JA
997static void *thread_main(void *data)
998{
10927316 999 unsigned long long runtime[2], elapsed;
ebac4655 1000 struct thread_data *td = data;
e8462bd8 1001 pthread_condattr_t attr;
a978ba68 1002 int clear_state;
ebac4655 1003
2dc1bbeb 1004 if (!td->o.use_thread)
ebac4655
JA
1005 setsid();
1006
1007 td->pid = getpid();
1008
5921e80c 1009 dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
ee56ad50 1010
01743ee1
JA
1011 INIT_FLIST_HEAD(&td->io_u_freelist);
1012 INIT_FLIST_HEAD(&td->io_u_busylist);
1013 INIT_FLIST_HEAD(&td->io_u_requeues);
1014 INIT_FLIST_HEAD(&td->io_log_list);
1015 INIT_FLIST_HEAD(&td->io_hist_list);
e8462bd8
JA
1016 INIT_FLIST_HEAD(&td->verify_list);
1017 pthread_mutex_init(&td->io_u_lock, NULL);
bb5d7d0b 1018 td->io_hist_tree = RB_ROOT;
aea47d44 1019
e8462bd8
JA
1020 pthread_condattr_init(&attr);
1021 pthread_cond_init(&td->verify_cond, &attr);
1022 pthread_cond_init(&td->free_cond, &attr);
1023
db1cd90b 1024 td_set_runstate(td, TD_INITIALIZED);
29adda3c 1025 dprint(FD_MUTEX, "up startup_mutex\n");
cdd18ad8 1026 fio_mutex_up(startup_mutex);
29adda3c 1027 dprint(FD_MUTEX, "wait on td->mutex\n");
cdd18ad8 1028 fio_mutex_down(td->mutex);
29adda3c 1029 dprint(FD_MUTEX, "done waiting on td->mutex\n");
db1cd90b
JA
1030
1031 /*
cdd18ad8 1032 * the ->mutex mutex is now no longer used, close it to avoid
db1cd90b
JA
1033 * eating a file descriptor
1034 */
cdd18ad8 1035 fio_mutex_remove(td->mutex);
db1cd90b 1036
d84f8d49
JA
1037 /*
1038 * May alter parameters that init_io_u() will use, so we need to
1039 * do this first.
1040 */
1041 if (init_iolog(td))
1042 goto err;
1043
ebac4655 1044 if (init_io_u(td))
db1cd90b 1045 goto err;
ebac4655 1046
e8462bd8
JA
1047 if (td->o.verify_async && verify_async_init(td))
1048 goto err;
1049
1050 if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
e1161c32 1051 td_verror(td, errno, "cpu_set_affinity");
db1cd90b 1052 goto err;
ebac4655
JA
1053 }
1054
f484470b
JA
1055 /*
1056 * If we have a gettimeofday() thread, make sure we exclude that
1057 * thread from this job
1058 */
be4ecfdf 1059 if (td->o.gtod_cpu) {
be4ecfdf 1060 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
e8462bd8 1061 if (fio_setaffinity(td->pid, td->o.cpumask) == -1) {
be4ecfdf
JA
1062 td_verror(td, errno, "cpu_set_affinity");
1063 goto err;
1064 }
1065 }
1066
ac684785 1067 if (td->ioprio_set) {
ebac4655 1068 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
e1161c32 1069 td_verror(td, errno, "ioprio_set");
db1cd90b 1070 goto err;
ebac4655
JA
1071 }
1072 }
1073
2dc1bbeb 1074 if (nice(td->o.nice) == -1) {
e1161c32 1075 td_verror(td, errno, "nice");
db1cd90b 1076 goto err;
b6f4d880
JA
1077 }
1078
2dc1bbeb 1079 if (td->o.ioscheduler && switch_ioscheduler(td))
db1cd90b 1080 goto err;
37f56873 1081
2dc1bbeb 1082 if (!td->o.create_serialize && setup_files(td))
ebac4655
JA
1083 goto err;
1084
7d6c5283
JA
1085 if (td_io_init(td))
1086 goto err;
1087
68727076
JA
1088 if (init_random_map(td))
1089 goto err;
1090
2dc1bbeb 1091 if (td->o.exec_prerun) {
398e8c4d 1092 if (exec_string(td->o.exec_prerun))
69cfd7e0
JA
1093 goto err;
1094 }
4e0ba8af 1095
afad68f7
ZY
1096 if (td->o.pre_read) {
1097 if (pre_read_files(td) < 0)
1098 goto err;
1099 }
1100
69008999 1101 fio_gettime(&td->epoch, NULL);
756867bd 1102 getrusage(RUSAGE_SELF, &td->ts.ru_start);
69008999
JA
1103
1104 runtime[0] = runtime[1] = 0;
a978ba68 1105 clear_state = 0;
492158cf 1106 while (keep_running(td)) {
02bcaa8c 1107 fio_gettime(&td->start, NULL);
756867bd 1108 memcpy(&td->ts.stat_sample_time, &td->start, sizeof(td->start));
993bf48b 1109 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
ebac4655 1110
cf2dd8d6 1111 if (td->o.ratemin[0] || td->o.ratemin[1])
5ec10eaa
JA
1112 memcpy(&td->lastrate, &td->ts.stat_sample_time,
1113 sizeof(td->lastrate));
ebac4655 1114
df9c26b1
JA
1115 if (clear_state)
1116 clear_io_state(td);
a978ba68 1117
ebac4655
JA
1118 prune_io_piece_log(td);
1119
ba0fbe10 1120 do_io(td);
ebac4655 1121
a978ba68
JA
1122 clear_state = 1;
1123
38d77cae 1124 if (td_read(td) && td->io_bytes[DDIR_READ]) {
0a4957c6 1125 elapsed = utime_since_now(&td->start);
38d77cae
JA
1126 runtime[DDIR_READ] += elapsed;
1127 }
1128 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
0a4957c6 1129 elapsed = utime_since_now(&td->start);
38d77cae
JA
1130 runtime[DDIR_WRITE] += elapsed;
1131 }
5ec10eaa 1132
ebac4655
JA
1133 if (td->error || td->terminate)
1134 break;
1135
e84c73a8
SL
1136 if (!td->o.do_verify ||
1137 td->o.verify == VERIFY_NONE ||
b67740d3 1138 (td->io_ops->flags & FIO_UNIDIR))
ebac4655
JA
1139 continue;
1140
df9c26b1 1141 clear_io_state(td);
a978ba68 1142
02bcaa8c 1143 fio_gettime(&td->start, NULL);
ebac4655
JA
1144
1145 do_verify(td);
1146
69008999 1147 runtime[DDIR_READ] += utime_since_now(&td->start);
ebac4655
JA
1148
1149 if (td->error || td->terminate)
1150 break;
1151 }
1152
36dff966 1153 update_rusage_stat(td);
47f0cc48
YHJT
1154 td->ts.runtime[0] = (runtime[0] + 999) / 1000;
1155 td->ts.runtime[1] = (runtime[1] + 999) / 1000;
756867bd
JA
1156 td->ts.total_run_time = mtime_since_now(&td->epoch);
1157 td->ts.io_bytes[0] = td->io_bytes[0];
1158 td->ts.io_bytes[1] = td->io_bytes[1];
1159
d2bbb8d9 1160 fio_mutex_down(writeout_mutex);
e3cedca7 1161 if (td->ts.bw_log) {
f484470b
JA
1162 if (td->o.bw_log_file) {
1163 finish_log_named(td, td->ts.bw_log,
1164 td->o.bw_log_file, "bw");
1165 } else
e3cedca7
JA
1166 finish_log(td, td->ts.bw_log, "bw");
1167 }
1168 if (td->ts.slat_log) {
f484470b
JA
1169 if (td->o.lat_log_file) {
1170 finish_log_named(td, td->ts.slat_log,
1ca95738 1171 td->o.lat_log_file, "slat");
f484470b 1172 } else
e3cedca7
JA
1173 finish_log(td, td->ts.slat_log, "slat");
1174 }
1175 if (td->ts.clat_log) {
f484470b
JA
1176 if (td->o.lat_log_file) {
1177 finish_log_named(td, td->ts.clat_log,
1178 td->o.lat_log_file, "clat");
1179 } else
e3cedca7
JA
1180 finish_log(td, td->ts.clat_log, "clat");
1181 }
d2bbb8d9 1182 fio_mutex_up(writeout_mutex);
398e8c4d
JA
1183 if (td->o.exec_postrun)
1184 exec_string(td->o.exec_postrun);
ebac4655
JA
1185
1186 if (exitall_on_terminate)
390c40e2 1187 terminate_threads(td->groupid);
ebac4655
JA
1188
1189err:
5bf13a5a 1190 if (td->error)
5921e80c 1191 printf("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
5ec10eaa 1192 td->verror);
24ffd2c2 1193 close_and_free_files(td);
2866c82d 1194 close_ioengine(td);
ebac4655 1195 cleanup_io_u(td);
f29b25a3 1196
d2ce18b5
JA
1197 if (td->o.cpumask_set) {
1198 int ret = fio_cpuset_exit(&td->o.cpumask);
1199
1200 td_verror(td, ret, "fio_cpuset_exit");
1201 }
4e78e405 1202
e8462bd8
JA
1203 if (td->o.verify_async)
1204 verify_async_exit(td);
1205
f29b25a3
JA
1206 /*
1207 * do this very late, it will log file closing as well
1208 */
1209 if (td->o.write_iolog_file)
1210 write_iolog_close(td);
1211
d23bb327 1212 options_mem_free(td);
ebac4655 1213 td_set_runstate(td, TD_EXITED);
43d76807 1214 return (void *) (unsigned long) td->error;
ebac4655
JA
1215}
1216
906c8d75
JA
1217/*
1218 * We cannot pass the td data into a forked process, so attach the td and
1219 * pass it to the thread worker.
1220 */
a6418147 1221static int fork_main(int shmid, int offset)
ebac4655
JA
1222{
1223 struct thread_data *td;
a6418147 1224 void *data, *ret;
ebac4655
JA
1225
1226 data = shmat(shmid, NULL, 0);
1227 if (data == (void *) -1) {
a6418147
JA
1228 int __err = errno;
1229
ebac4655 1230 perror("shmat");
a6418147 1231 return __err;
ebac4655
JA
1232 }
1233
1234 td = data + offset * sizeof(struct thread_data);
a6418147 1235 ret = thread_main(td);
ebac4655 1236 shmdt(data);
43d76807 1237 return (int) (unsigned long) ret;
ebac4655
JA
1238}
1239
906c8d75
JA
1240/*
1241 * Run over the job map and reap the threads that have exited, if any.
1242 */
ebac4655
JA
1243static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1244{
34572e28 1245 struct thread_data *td;
1f809d15 1246 int i, cputhreads, realthreads, pending, status, ret;
ebac4655
JA
1247
1248 /*
1249 * reap exited threads (TD_EXITED -> TD_REAPED)
1250 */
1f809d15 1251 realthreads = pending = cputhreads = 0;
34572e28 1252 for_each_td(td, i) {
3707f45b 1253 int flags = 0;
a2f77c9f 1254
84585003
JA
1255 /*
1256 * ->io_ops is NULL for a thread that has closed its
1257 * io engine
1258 */
ba0fbe10 1259 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
b990b5c0 1260 cputhreads++;
1f809d15
JA
1261 else
1262 realthreads++;
b990b5c0 1263
a1dedc1f
AC
1264 if (!td->pid) {
1265 pending++;
1266 continue;
1267 }
1268 if (td->runstate == TD_REAPED)
a2f77c9f 1269 continue;
2dc1bbeb 1270 if (td->o.use_thread) {
3707f45b
JA
1271 if (td->runstate == TD_EXITED) {
1272 td_set_runstate(td, TD_REAPED);
1273 goto reaped;
1274 }
1275 continue;
1276 }
a2f77c9f
JA
1277
1278 flags = WNOHANG;
1279 if (td->runstate == TD_EXITED)
1280 flags = 0;
1281
1282 /*
1283 * check if someone quit or got killed in an unusual way
1284 */
1285 ret = waitpid(td->pid, &status, flags);
3707f45b 1286 if (ret < 0) {
a2f77c9f 1287 if (errno == ECHILD) {
5921e80c
JA
1288 log_err("fio: pid=%d disappeared %d\n",
1289 (int) td->pid, td->runstate);
a2f77c9f
JA
1290 td_set_runstate(td, TD_REAPED);
1291 goto reaped;
1292 }
1293 perror("waitpid");
1294 } else if (ret == td->pid) {
1295 if (WIFSIGNALED(status)) {
fab6aa71
JA
1296 int sig = WTERMSIG(status);
1297
d9244941 1298 if (sig != SIGQUIT)
5ec10eaa 1299 log_err("fio: pid=%d, got signal=%d\n",
5921e80c 1300 (int) td->pid, sig);
fab6aa71
JA
1301 td_set_runstate(td, TD_REAPED);
1302 goto reaped;
1303 }
a2f77c9f
JA
1304 if (WIFEXITED(status)) {
1305 if (WEXITSTATUS(status) && !td->error)
1306 td->error = WEXITSTATUS(status);
a2f77c9f 1307
a2f77c9f
JA
1308 td_set_runstate(td, TD_REAPED);
1309 goto reaped;
a6418147
JA
1310 }
1311 }
ebac4655 1312
a2f77c9f
JA
1313 /*
1314 * thread is not dead, continue
1315 */
e48676ba 1316 pending++;
a2f77c9f 1317 continue;
fab6aa71 1318reaped:
ebac4655 1319 (*nr_running)--;
581e7141
JA
1320 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1321 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
6f88bcb0
JA
1322 if (!td->pid)
1323 pending--;
a2f77c9f
JA
1324
1325 if (td->error)
1326 exit_value++;
d3eeeabc
JA
1327
1328 done_secs += mtime_since_now(&td->epoch) / 1000;
ebac4655 1329 }
b990b5c0 1330
1f809d15 1331 if (*nr_running == cputhreads && !pending && realthreads)
390c40e2 1332 terminate_threads(TERMINATE_ALL);
ebac4655
JA
1333}
1334
be4ecfdf
JA
1335static void *gtod_thread_main(void *data)
1336{
1337 fio_mutex_up(startup_mutex);
1338
1339 /*
1340 * As long as we have jobs around, update the clock. It would be nice
1341 * to have some way of NOT hammering that CPU with gettimeofday(),
1342 * but I'm not sure what to use outside of a simple CPU nop to relax
1343 * it - we don't want to lose precision.
1344 */
1345 while (threads) {
1346 fio_gtod_update();
1347 nop;
1348 }
1349
1350 return NULL;
1351}
1352
1353static int fio_start_gtod_thread(void)
1354{
f42c153d
JA
1355 int ret;
1356
1357 ret = pthread_create(&gtod_thread, NULL, gtod_thread_main, NULL);
1358 if (ret) {
1359 log_err("Can't create gtod thread: %s\n", strerror(ret));
be4ecfdf
JA
1360 return 1;
1361 }
f42c153d
JA
1362
1363 ret = pthread_detach(gtod_thread);
1364 if (ret) {
1365 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
be4ecfdf
JA
1366 return 1;
1367 }
1368
29adda3c 1369 dprint(FD_MUTEX, "wait on startup_mutex\n");
be4ecfdf 1370 fio_mutex_down(startup_mutex);
29adda3c 1371 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
be4ecfdf
JA
1372 return 0;
1373}
1374
906c8d75
JA
1375/*
1376 * Main function for kicking off and reaping jobs, as needed.
1377 */
ebac4655
JA
1378static void run_threads(void)
1379{
ebac4655
JA
1380 struct thread_data *td;
1381 unsigned long spent;
1382 int i, todo, nr_running, m_rate, t_rate, nr_started;
fcb6ade2 1383
2f9ade3c
JA
1384 if (fio_pin_memory())
1385 return;
ebac4655 1386
be4ecfdf
JA
1387 if (fio_gtod_offload && fio_start_gtod_thread())
1388 return;
1389
c6ae0a5b 1390 if (!terse_output) {
9cedf167
JA
1391 printf("Starting ");
1392 if (nr_thread)
5ec10eaa
JA
1393 printf("%d thread%s", nr_thread,
1394 nr_thread > 1 ? "s" : "");
9cedf167
JA
1395 if (nr_process) {
1396 if (nr_thread)
1397 printf(" and ");
5ec10eaa
JA
1398 printf("%d process%s", nr_process,
1399 nr_process > 1 ? "es" : "");
9cedf167
JA
1400 }
1401 printf("\n");
c6ae0a5b
JA
1402 fflush(stdout);
1403 }
c04f7ec3 1404
697a606c 1405 set_sig_handlers();
4efa970e 1406
ebac4655
JA
1407 todo = thread_number;
1408 nr_running = 0;
1409 nr_started = 0;
1410 m_rate = t_rate = 0;
1411
34572e28 1412 for_each_td(td, i) {
263e529f 1413 print_status_init(td->thread_number - 1);
ebac4655 1414
2dc1bbeb 1415 if (!td->o.create_serialize) {
380cf265 1416 init_disk_util(td);
ebac4655 1417 continue;
380cf265 1418 }
ebac4655
JA
1419
1420 /*
1421 * do file setup here so it happens sequentially,
1422 * we don't want X number of threads getting their
1423 * client data interspersed on disk
1424 */
53cdc686 1425 if (setup_files(td)) {
5bf13a5a
JA
1426 exit_value++;
1427 if (td->error)
5921e80c
JA
1428 log_err("fio: pid=%d, err=%d/%s\n",
1429 (int) td->pid, td->error, td->verror);
ebac4655
JA
1430 td_set_runstate(td, TD_REAPED);
1431 todo--;
c69e8875
JA
1432 } else {
1433 struct fio_file *f;
1434 unsigned int i;
1435
1436 /*
1437 * for sharing to work, each job must always open
1438 * its own files. so close them, if we opened them
1439 * for creation
1440 */
22a57ba8
JA
1441 for_each_file(td, f, i) {
1442 if (fio_file_open(f))
1443 td_io_close_file(td, f);
22a57ba8 1444 }
5ec10eaa 1445 }
380cf265
JA
1446
1447 init_disk_util(td);
ebac4655
JA
1448 }
1449
a2f77c9f
JA
1450 set_genesis_time();
1451
ebac4655 1452 while (todo) {
75154845
JA
1453 struct thread_data *map[MAX_JOBS];
1454 struct timeval this_start;
1455 int this_jobs = 0, left;
1456
ebac4655
JA
1457 /*
1458 * create threads (TD_NOT_CREATED -> TD_CREATED)
1459 */
34572e28 1460 for_each_td(td, i) {
ebac4655
JA
1461 if (td->runstate != TD_NOT_CREATED)
1462 continue;
1463
1464 /*
1465 * never got a chance to start, killed by other
1466 * thread for some reason
1467 */
1468 if (td->terminate) {
1469 todo--;
1470 continue;
1471 }
1472
2dc1bbeb 1473 if (td->o.start_delay) {
263e529f 1474 spent = mtime_since_genesis();
ebac4655 1475
2dc1bbeb 1476 if (td->o.start_delay * 1000 > spent)
ebac4655
JA
1477 continue;
1478 }
1479
6f88bcb0
JA
1480 if (td->o.stonewall && (nr_started || nr_running)) {
1481 dprint(FD_PROCESS, "%s: stonewall wait\n",
1482 td->o.name);
ebac4655 1483 break;
6f88bcb0 1484 }
ebac4655 1485
75154845
JA
1486 /*
1487 * Set state to created. Thread will transition
1488 * to TD_INITIALIZED when it's done setting up.
1489 */
ebac4655 1490 td_set_runstate(td, TD_CREATED);
75154845 1491 map[this_jobs++] = td;
ebac4655
JA
1492 nr_started++;
1493
2dc1bbeb 1494 if (td->o.use_thread) {
f42c153d
JA
1495 int ret;
1496
ee56ad50 1497 dprint(FD_PROCESS, "will pthread_create\n");
f42c153d
JA
1498 ret = pthread_create(&td->thread, NULL,
1499 thread_main, td);
1500 if (ret) {
1501 log_err("pthread_create: %s\n",
1502 strerror(ret));
ebac4655 1503 nr_started--;
c8bb6faf 1504 break;
ebac4655 1505 }
f42c153d
JA
1506 ret = pthread_detach(td->thread);
1507 if (ret)
1508 log_err("pthread_detach: %s",
1509 strerror(ret));
ebac4655 1510 } else {
5e1d306e 1511 pid_t pid;
ee56ad50 1512 dprint(FD_PROCESS, "will fork\n");
5e1d306e
JA
1513 pid = fork();
1514 if (!pid) {
a6418147
JA
1515 int ret = fork_main(shm_id, i);
1516
5e1d306e
JA
1517 _exit(ret);
1518 } else if (i == fio_debug_jobno)
1519 *fio_debug_jobp = pid;
ebac4655 1520 }
29adda3c 1521 dprint(FD_MUTEX, "wait on startup_mutex\n");
656b1393
JA
1522 if (fio_mutex_down_timeout(startup_mutex, 10)) {
1523 log_err("fio: job startup hung? exiting.\n");
1524 terminate_threads(TERMINATE_ALL);
1525 fio_abort = 1;
1526 nr_started--;
1527 break;
1528 }
29adda3c 1529 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
ebac4655
JA
1530 }
1531
1532 /*
75154845
JA
1533 * Wait for the started threads to transition to
1534 * TD_INITIALIZED.
ebac4655 1535 */
02bcaa8c 1536 fio_gettime(&this_start, NULL);
75154845 1537 left = this_jobs;
6ce15a32 1538 while (left && !fio_abort) {
75154845
JA
1539 if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1540 break;
1541
1542 usleep(100000);
1543
1544 for (i = 0; i < this_jobs; i++) {
1545 td = map[i];
1546 if (!td)
1547 continue;
b6f4d880 1548 if (td->runstate == TD_INITIALIZED) {
75154845
JA
1549 map[i] = NULL;
1550 left--;
b6f4d880
JA
1551 } else if (td->runstate >= TD_EXITED) {
1552 map[i] = NULL;
1553 left--;
1554 todo--;
1555 nr_running++; /* work-around... */
75154845
JA
1556 }
1557 }
1558 }
1559
1560 if (left) {
3b70d7e5 1561 log_err("fio: %d jobs failed to start\n", left);
75154845
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 /*
b6f4d880 1572 * start created threads (TD_INITIALIZED -> TD_RUNNING).
75154845 1573 */
34572e28 1574 for_each_td(td, i) {
75154845 1575 if (td->runstate != TD_INITIALIZED)
ebac4655
JA
1576 continue;
1577
b29ee5b3
JA
1578 if (in_ramp_time(td))
1579 td_set_runstate(td, TD_RAMP);
1580 else
1581 td_set_runstate(td, TD_RUNNING);
ebac4655
JA
1582 nr_running++;
1583 nr_started--;
581e7141
JA
1584 m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1585 t_rate += td->o.rate[0] + td->o.rate[1];
75154845 1586 todo--;
cdd18ad8 1587 fio_mutex_up(td->mutex);
ebac4655
JA
1588 }
1589
1590 reap_threads(&nr_running, &t_rate, &m_rate);
1591
1592 if (todo)
1593 usleep(100000);
1594 }
1595
1596 while (nr_running) {
1597 reap_threads(&nr_running, &t_rate, &m_rate);
1598 usleep(10000);
1599 }
1600
1601 update_io_ticks();
2f9ade3c 1602 fio_unpin_memory();
ebac4655
JA
1603}
1604
ebac4655
JA
1605int main(int argc, char *argv[])
1606{
29d610e1
JA
1607 long ps;
1608
2e5cdb11
JA
1609 sinit();
1610
dbe1125e
JA
1611 /*
1612 * We need locale for number printing, if it isn't set then just
1613 * go with the US format.
1614 */
1615 if (!getenv("LC_NUMERIC"))
1616 setlocale(LC_NUMERIC, "en_US");
1617
ebac4655
JA
1618 if (parse_options(argc, argv))
1619 return 1;
1620
4b472fa3
JA
1621 if (!thread_number)
1622 return 0;
ebac4655 1623
29d610e1
JA
1624 ps = sysconf(_SC_PAGESIZE);
1625 if (ps < 0) {
1626 log_err("Failed to get page size\n");
1627 return 1;
1628 }
1629
cfc99db7 1630 page_size = ps;
29d610e1
JA
1631 page_mask = ps - 1;
1632
bb3884d8
JA
1633 if (write_bw_log) {
1634 setup_log(&agg_io_log[DDIR_READ]);
1635 setup_log(&agg_io_log[DDIR_WRITE]);
1636 }
1637
cdd18ad8 1638 startup_mutex = fio_mutex_init(0);
d2bbb8d9 1639 writeout_mutex = fio_mutex_init(1);
07739b57 1640
a2f77c9f
JA
1641 set_genesis_time();
1642
ccb0fa24 1643 status_timer_arm();
ebac4655
JA
1644
1645 run_threads();
6ce15a32 1646
bb3884d8 1647 if (!fio_abort) {
6ce15a32 1648 show_run_stats();
bb3884d8 1649 if (write_bw_log) {
5ec10eaa
JA
1650 __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1651 __finish_log(agg_io_log[DDIR_WRITE],
1652 "agg-write_bw.log");
bb3884d8
JA
1653 }
1654 }
ebac4655 1655
cdd18ad8 1656 fio_mutex_remove(startup_mutex);
d2bbb8d9 1657 fio_mutex_remove(writeout_mutex);
437c9b71 1658 return exit_value;
ebac4655 1659}