Fix race in exit of eta/util thread
[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
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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
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24#include <unistd.h>
25#include <fcntl.h>
26#include <string.h>
9b836561 27#include <limits.h>
ebac4655
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28#include <signal.h>
29#include <time.h>
dbe1125e 30#include <locale.h>
36167d82 31#include <assert.h>
a5b01f1b 32#include <time.h>
ebac4655
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33#include <sys/stat.h>
34#include <sys/wait.h>
35#include <sys/ipc.h>
36#include <sys/shm.h>
ebac4655
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37#include <sys/mman.h>
38
39#include "fio.h"
210f43b3 40#include "hash.h"
2e5cdb11 41#include "smalloc.h"
4f5af7b2 42#include "verify.h"
a917a8b3 43#include "trim.h"
7c9b1bce 44#include "diskutil.h"
a696fa2a 45#include "cgroup.h"
07b3232d 46#include "profile.h"
d54a144d 47#include "lib/rand.h"
ebac4655 48
cfc99db7
JA
49unsigned long page_mask;
50unsigned long page_size;
d529ee19
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51
52#define PAGE_ALIGN(buf) \
29d610e1 53 (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
ebac4655
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54
55int groupid = 0;
56int thread_number = 0;
9cedf167
JA
57int nr_process = 0;
58int nr_thread = 0;
ebac4655 59int shm_id = 0;
53cdc686 60int temp_stall_ts;
d3eeeabc 61unsigned long done_secs = 0;
ebac4655 62
cdd18ad8 63static struct fio_mutex *startup_mutex;
d2bbb8d9 64static struct fio_mutex *writeout_mutex;
6ce15a32 65static volatile int fio_abort;
437c9b71 66static int exit_value;
be4ecfdf 67static pthread_t gtod_thread;
7985701b 68static pthread_t disk_util_thread;
dae5341c 69static struct flist_head *cgroup_list;
6adb38a1 70static char *cgroup_mnt;
ebac4655 71
bb3884d8
JA
72struct io_log *agg_io_log[2];
73
ebac4655 74#define TERMINATE_ALL (-1)
75154845 75#define JOB_START_TIMEOUT (5 * 1000)
ebac4655 76
b29ee5b3 77void td_set_runstate(struct thread_data *td, int runstate)
6ce15a32 78{
d8fab1b6
JA
79 if (td->runstate == runstate)
80 return;
81
5921e80c
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82 dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
83 td->runstate, runstate);
6ce15a32
JA
84 td->runstate = runstate;
85}
86
390c40e2 87static void terminate_threads(int group_id)
ebac4655 88{
34572e28 89 struct thread_data *td;
ebac4655
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90 int i;
91
6f88bcb0
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92 dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
93
34572e28 94 for_each_td(td, i) {
ebac4655 95 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
6f88bcb0 96 dprint(FD_PROCESS, "setting terminate on %s/%d\n",
5921e80c 97 td->o.name, (int) td->pid);
ad830ed7
JA
98 td->terminate = 1;
99 td->o.start_delay = 0;
100
7a93ab19
JA
101 /*
102 * if the thread is running, just let it exit
103 */
104 if (td->runstate < TD_RUNNING)
03e20d68 105 kill(td->pid, SIGTERM);
f63f7f3b
JA
106 else {
107 struct ioengine_ops *ops = td->io_ops;
108
03e20d68
BC
109 if (ops && (ops->flags & FIO_SIGTERM))
110 kill(td->pid, SIGTERM);
f63f7f3b 111 }
ebac4655
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112 }
113 }
114}
115
5f8f9726
JA
116/*
117 * Happens on thread runs with ctrl-c, ignore our own SIGQUIT
118 */
119static void sig_quit(int sig)
120{
121}
122
697a606c
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123static void sig_int(int sig)
124{
125 if (threads) {
4ceb30d4 126 log_info("\nfio: terminating on signal %d\n", sig);
5ec10eaa
JA
127 fflush(stdout);
128 terminate_threads(TERMINATE_ALL);
ebac4655
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129 }
130}
131
7985701b 132static void *disk_thread_main(void *data)
a5b01f1b 133{
7985701b
JA
134 fio_mutex_up(startup_mutex);
135
136 while (threads) {
137 usleep(DISK_UTIL_MSEC * 1000);
9a793c2f
JA
138 if (!threads)
139 break;
7985701b
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140 update_io_ticks();
141 print_thread_status();
142 }
143
144 return NULL;
a5b01f1b
JA
145}
146
7985701b 147static int create_disk_util_thread(void)
a5b01f1b 148{
7985701b
JA
149 pthread_attr_t attr;
150 int ret;
a5b01f1b 151
7985701b
JA
152 pthread_attr_init(&attr);
153 pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
154 ret = pthread_create(&disk_util_thread, &attr, disk_thread_main, NULL);
155 pthread_attr_destroy(&attr);
156 if (ret) {
157 log_err("Can't create disk util thread: %s\n", strerror(ret));
158 return 1;
159 }
a5b01f1b 160
7985701b
JA
161 ret = pthread_detach(disk_util_thread);
162 if (ret) {
163 log_err("Can't detatch disk util thread: %s\n", strerror(ret));
164 return 1;
165 }
03e20d68 166
7985701b
JA
167 dprint(FD_MUTEX, "wait on startup_mutex\n");
168 fio_mutex_down(startup_mutex);
169 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
170 return 0;
a5b01f1b
JA
171}
172
697a606c
JA
173static void set_sig_handlers(void)
174{
175 struct sigaction act;
176
697a606c
JA
177 memset(&act, 0, sizeof(act));
178 act.sa_handler = sig_int;
179 act.sa_flags = SA_RESTART;
180 sigaction(SIGINT, &act, NULL);
de79c915 181
5f8f9726
JA
182 memset(&act, 0, sizeof(act));
183 act.sa_handler = sig_quit;
184 act.sa_flags = SA_RESTART;
03e20d68 185 sigaction(SIGTERM, &act, NULL);
697a606c
JA
186}
187
906c8d75
JA
188/*
189 * Check if we are above the minimum rate given.
190 */
581e7141
JA
191static int __check_min_rate(struct thread_data *td, struct timeval *now,
192 enum td_ddir ddir)
ebac4655 193{
0904200b 194 unsigned long long bytes = 0;
4e991c23 195 unsigned long iops = 0;
ebac4655
JA
196 unsigned long spent;
197 unsigned long rate;
581e7141
JA
198 unsigned int ratemin = 0;
199 unsigned int rate_iops = 0;
200 unsigned int rate_iops_min = 0;
ebac4655 201
ff58fced
JA
202 assert(ddir_rw(ddir));
203
d982d873
JA
204 if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
205 return 0;
206
ebac4655
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207 /*
208 * allow a 2 second settle period in the beginning
209 */
210 if (mtime_since(&td->start, now) < 2000)
211 return 0;
212
581e7141
JA
213 iops += td->io_blocks[ddir];
214 bytes += td->this_io_bytes[ddir];
215 ratemin += td->o.ratemin[ddir];
216 rate_iops += td->o.rate_iops[ddir];
217 rate_iops_min += td->o.rate_iops_min[ddir];
0904200b 218
ebac4655
JA
219 /*
220 * if rate blocks is set, sample is running
221 */
581e7141
JA
222 if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
223 spent = mtime_since(&td->lastrate[ddir], now);
2dc1bbeb 224 if (spent < td->o.ratecycle)
ebac4655
JA
225 return 0;
226
581e7141 227 if (td->o.rate[ddir]) {
4e991c23
JA
228 /*
229 * check bandwidth specified rate
230 */
581e7141 231 if (bytes < td->rate_bytes[ddir]) {
5ec10eaa 232 log_err("%s: min rate %u not met\n", td->o.name,
581e7141 233 ratemin);
4e991c23
JA
234 return 1;
235 } else {
581e7141
JA
236 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
237 if (rate < ratemin ||
238 bytes < td->rate_bytes[ddir]) {
5ec10eaa 239 log_err("%s: min rate %u not met, got"
b22989b9 240 " %luKB/sec\n", td->o.name,
581e7141 241 ratemin, rate);
4e991c23
JA
242 return 1;
243 }
244 }
413dd459 245 } else {
4e991c23
JA
246 /*
247 * checks iops specified rate
248 */
581e7141 249 if (iops < rate_iops) {
5ec10eaa 250 log_err("%s: min iops rate %u not met\n",
581e7141 251 td->o.name, rate_iops);
413dd459 252 return 1;
4e991c23 253 } else {
581e7141
JA
254 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
255 if (rate < rate_iops_min ||
256 iops < td->rate_blocks[ddir]) {
5ec10eaa
JA
257 log_err("%s: min iops rate %u not met,"
258 " got %lu\n", td->o.name,
581e7141 259 rate_iops_min, rate);
4e991c23 260 }
413dd459 261 }
ebac4655
JA
262 }
263 }
264
581e7141
JA
265 td->rate_bytes[ddir] = bytes;
266 td->rate_blocks[ddir] = iops;
267 memcpy(&td->lastrate[ddir], now, sizeof(*now));
ebac4655
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268 return 0;
269}
270
581e7141
JA
271static int check_min_rate(struct thread_data *td, struct timeval *now,
272 unsigned long *bytes_done)
273{
274 int ret = 0;
275
276 if (bytes_done[0])
277 ret |= __check_min_rate(td, now, 0);
278 if (bytes_done[1])
279 ret |= __check_min_rate(td, now, 1);
280
281 return ret;
282}
283
ebac4655
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284static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
285{
2dc1bbeb 286 if (!td->o.timeout)
ebac4655 287 return 0;
2dc1bbeb 288 if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
ebac4655
JA
289 return 1;
290
291 return 0;
292}
293
906c8d75
JA
294/*
295 * When job exits, we can cancel the in-flight IO if we are using async
296 * io. Attempt to do so.
297 */
ebac4655
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298static void cleanup_pending_aio(struct thread_data *td)
299{
01743ee1 300 struct flist_head *entry, *n;
ebac4655
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301 struct io_u *io_u;
302 int r;
303
304 /*
305 * get immediately available events, if any
306 */
581e7141 307 r = io_u_queued_complete(td, 0, NULL);
b2fdda43
JA
308 if (r < 0)
309 return;
ebac4655
JA
310
311 /*
312 * now cancel remaining active events
313 */
2866c82d 314 if (td->io_ops->cancel) {
01743ee1
JA
315 flist_for_each_safe(entry, n, &td->io_u_busylist) {
316 io_u = flist_entry(entry, struct io_u, list);
ebac4655 317
0c6e7517
JA
318 /*
319 * if the io_u isn't in flight, then that generally
320 * means someone leaked an io_u. complain but fix
321 * it up, so we don't stall here.
322 */
323 if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
324 log_err("fio: non-busy IO on busy list\n");
ebac4655 325 put_io_u(td, io_u);
0c6e7517
JA
326 } else {
327 r = td->io_ops->cancel(td, io_u);
328 if (!r)
329 put_io_u(td, io_u);
330 }
ebac4655
JA
331 }
332 }
333
97601024 334 if (td->cur_depth)
581e7141 335 r = io_u_queued_complete(td, td->cur_depth, NULL);
ebac4655
JA
336}
337
858a3d47
JA
338/*
339 * Helper to handle the final sync of a file. Works just like the normal
340 * io path, just does everything sync.
341 */
342static int fio_io_sync(struct thread_data *td, struct fio_file *f)
343{
344 struct io_u *io_u = __get_io_u(td);
858a3d47
JA
345 int ret;
346
347 if (!io_u)
348 return 1;
349
350 io_u->ddir = DDIR_SYNC;
351 io_u->file = f;
352
353 if (td_io_prep(td, io_u)) {
354 put_io_u(td, io_u);
355 return 1;
356 }
357
755200a3 358requeue:
858a3d47 359 ret = td_io_queue(td, io_u);
36167d82 360 if (ret < 0) {
e1161c32 361 td_verror(td, io_u->error, "td_io_queue");
858a3d47 362 put_io_u(td, io_u);
858a3d47 363 return 1;
36167d82 364 } else if (ret == FIO_Q_QUEUED) {
581e7141 365 if (io_u_queued_complete(td, 1, NULL) < 0)
36167d82 366 return 1;
36167d82
JA
367 } else if (ret == FIO_Q_COMPLETED) {
368 if (io_u->error) {
e1161c32 369 td_verror(td, io_u->error, "td_io_queue");
36167d82
JA
370 return 1;
371 }
858a3d47 372
581e7141 373 if (io_u_sync_complete(td, io_u, NULL) < 0)
b2fdda43 374 return 1;
755200a3
JA
375 } else if (ret == FIO_Q_BUSY) {
376 if (td_io_commit(td))
377 return 1;
378 goto requeue;
858a3d47
JA
379 }
380
381 return 0;
382}
383
993bf48b
JA
384static inline void update_tv_cache(struct thread_data *td)
385{
386 if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
387 fio_gettime(&td->tv_cache, NULL);
388}
389
f2bba182
RR
390static int break_on_this_error(struct thread_data *td, int *retptr)
391{
392 int ret = *retptr;
393
394 if (ret < 0 || td->error) {
395 int err;
396
1ec99eea
JA
397 if (!td->o.continue_on_error)
398 return 1;
f2bba182
RR
399
400 if (ret < 0)
401 err = -ret;
402 else
403 err = td->error;
404
f2bba182
RR
405 if (td_non_fatal_error(err)) {
406 /*
407 * Continue with the I/Os in case of
408 * a non fatal error.
409 */
8a4f8a24 410 update_error_count(td, err);
f2bba182
RR
411 td_clear_error(td);
412 *retptr = 0;
413 return 0;
8a4f8a24
RR
414 } else if (td->o.fill_device && err == ENOSPC) {
415 /*
416 * We expect to hit this error if
417 * fill_device option is set.
418 */
419 td_clear_error(td);
420 td->terminate = 1;
421 return 1;
f2bba182
RR
422 } else {
423 /*
424 * Stop the I/O in case of a fatal
425 * error.
426 */
8a4f8a24 427 update_error_count(td, err);
f2bba182
RR
428 return 1;
429 }
430 }
431
432 return 0;
433}
434
906c8d75 435/*
34403fb1 436 * The main verify engine. Runs over the writes we previously submitted,
906c8d75
JA
437 * reads the blocks back in, and checks the crc/md5 of the data.
438 */
1e97cce9 439static void do_verify(struct thread_data *td)
ebac4655 440{
53cdc686 441 struct fio_file *f;
36167d82 442 struct io_u *io_u;
af52b345
JA
443 int ret, min_events;
444 unsigned int i;
e5b401d4 445
008618a8
JA
446 dprint(FD_VERIFY, "starting loop\n");
447
e5b401d4
JA
448 /*
449 * sync io first and invalidate cache, to make sure we really
450 * read from disk.
451 */
452 for_each_file(td, f, i) {
d6aed795 453 if (!fio_file_open(f))
3d7b485f 454 continue;
b2fdda43
JA
455 if (fio_io_sync(td, f))
456 break;
457 if (file_invalidate_cache(td, f))
458 break;
e5b401d4 459 }
ebac4655 460
b2fdda43
JA
461 if (td->error)
462 return;
463
ebac4655
JA
464 td_set_runstate(td, TD_VERIFYING);
465
36167d82
JA
466 io_u = NULL;
467 while (!td->terminate) {
4950421a 468 int ret2, full;
5451792e 469
993bf48b
JA
470 update_tv_cache(td);
471
472 if (runtime_exceeded(td, &td->tv_cache)) {
90a87d4b 473 td->terminate = 1;
02bcaa8c 474 break;
069c2918 475 }
02bcaa8c 476
dcb4830d
RR
477 io_u = __get_io_u(td);
478 if (!io_u)
479 break;
480
069c2918
JA
481 if (get_next_verify(td, io_u)) {
482 put_io_u(td, io_u);
ebac4655 483 break;
069c2918 484 }
ebac4655 485
069c2918
JA
486 if (td_io_prep(td, io_u)) {
487 put_io_u(td, io_u);
53cdc686 488 break;
069c2918 489 }
d7762cf8 490
e8462bd8
JA
491 if (td->o.verify_async)
492 io_u->end_io = verify_io_u_async;
493 else
494 io_u->end_io = verify_io_u;
53cdc686 495
11786802 496 ret = td_io_queue(td, io_u);
36167d82
JA
497 switch (ret) {
498 case FIO_Q_COMPLETED:
f2bba182 499 if (io_u->error) {
22819ec2 500 ret = -io_u->error;
f2bba182
RR
501 clear_io_u(td, io_u);
502 } else if (io_u->resid) {
36167d82 503 int bytes = io_u->xfer_buflen - io_u->resid;
d460eb31 504 struct fio_file *f = io_u->file;
ebac4655 505
9e9d164e
JA
506 /*
507 * zero read, fail
508 */
509 if (!bytes) {
41d9f0fd 510 td_verror(td, EIO, "full resid");
9e9d164e
JA
511 put_io_u(td, io_u);
512 break;
513 }
8400d9b2 514
36167d82
JA
515 io_u->xfer_buflen = io_u->resid;
516 io_u->xfer_buf += bytes;
8400d9b2
JA
517 io_u->offset += bytes;
518
ff58fced
JA
519 if (ddir_rw(io_u->ddir))
520 td->ts.short_io_u[io_u->ddir]++;
30061b97 521
d460eb31 522 if (io_u->offset == f->real_file_size)
8400d9b2
JA
523 goto sync_done;
524
11786802
JA
525 requeue_io_u(td, &io_u);
526 } else {
8400d9b2 527sync_done:
581e7141 528 ret = io_u_sync_complete(td, io_u, NULL);
11786802
JA
529 if (ret < 0)
530 break;
36167d82 531 }
36167d82
JA
532 continue;
533 case FIO_Q_QUEUED:
534 break;
755200a3
JA
535 case FIO_Q_BUSY:
536 requeue_io_u(td, &io_u);
5451792e
JA
537 ret2 = td_io_commit(td);
538 if (ret2 < 0)
539 ret = ret2;
755200a3 540 break;
36167d82
JA
541 default:
542 assert(ret < 0);
e1161c32 543 td_verror(td, -ret, "td_io_queue");
ebac4655
JA
544 break;
545 }
546
f2bba182 547 if (break_on_this_error(td, &ret))
3af6ef39
JA
548 break;
549
ebac4655 550 /*
3af6ef39
JA
551 * if we can queue more, do so. but check if there are
552 * completed io_u's first.
ebac4655 553 */
4950421a
JA
554 full = queue_full(td) || ret == FIO_Q_BUSY;
555 if (full || !td->o.iodepth_batch_complete) {
6a96276c
RR
556 min_events = min(td->o.iodepth_batch_complete,
557 td->cur_depth);
4950421a 558 if (full && !min_events)
838bc709 559 min_events = 1;
e916b390 560
4950421a
JA
561 do {
562 /*
563 * Reap required number of io units, if any,
564 * and do the verification on them through
565 * the callback handler
566 */
581e7141 567 if (io_u_queued_complete(td, min_events, NULL) < 0) {
4950421a
JA
568 ret = -1;
569 break;
570 }
571 } while (full && (td->cur_depth > td->o.iodepth_low));
572 }
573 if (ret < 0)
ebac4655 574 break;
36167d82 575 }
ebac4655 576
c01c0395
JA
577 if (!td->error) {
578 min_events = td->cur_depth;
579
580 if (min_events)
581e7141 581 ret = io_u_queued_complete(td, min_events, NULL);
c01c0395 582 } else
ebac4655
JA
583 cleanup_pending_aio(td);
584
585 td_set_runstate(td, TD_RUNNING);
008618a8
JA
586
587 dprint(FD_VERIFY, "exiting loop\n");
ebac4655
JA
588}
589
32cd46a0 590/*
906c8d75 591 * Main IO worker function. It retrieves io_u's to process and queues
32cd46a0
JA
592 * and reaps them, checking for rate and errors along the way.
593 */
ebac4655
JA
594static void do_io(struct thread_data *td)
595{
af52b345
JA
596 unsigned int i;
597 int ret = 0;
ebac4655 598
b29ee5b3
JA
599 if (in_ramp_time(td))
600 td_set_runstate(td, TD_RAMP);
601 else
602 td_set_runstate(td, TD_RUNNING);
5853e5a8 603
457bf399 604 while ( (td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
a917a8b3 605 (!flist_empty(&td->trim_list)) ||
457bf399 606 ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) ) {
97601024 607 struct timeval comp_time;
581e7141 608 unsigned long bytes_done[2] = { 0, 0 };
84585003 609 int min_evts = 0;
ebac4655 610 struct io_u *io_u;
4950421a 611 int ret2, full;
ebac4655
JA
612
613 if (td->terminate)
614 break;
615
993bf48b 616 update_tv_cache(td);
97601024 617
993bf48b 618 if (runtime_exceeded(td, &td->tv_cache)) {
90a87d4b 619 td->terminate = 1;
97601024
JA
620 break;
621 }
36167d82 622
dcb4830d
RR
623 io_u = get_io_u(td);
624 if (!io_u)
625 break;
626
b67740d3
JA
627 /*
628 * Add verification end_io handler, if asked to verify
629 * a previously written file.
630 */
715d2b3e
JA
631 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
632 !td_rw(td)) {
e8462bd8
JA
633 if (td->o.verify_async)
634 io_u->end_io = verify_io_u_async;
635 else
636 io_u->end_io = verify_io_u;
d8fab1b6 637 td_set_runstate(td, TD_VERIFYING);
b29ee5b3
JA
638 } else if (in_ramp_time(td))
639 td_set_runstate(td, TD_RAMP);
640 else
d8fab1b6 641 td_set_runstate(td, TD_RUNNING);
b67740d3 642
11786802 643 ret = td_io_queue(td, io_u);
36167d82
JA
644 switch (ret) {
645 case FIO_Q_COMPLETED:
f2bba182 646 if (io_u->error) {
5451792e 647 ret = -io_u->error;
f2bba182
RR
648 clear_io_u(td, io_u);
649 } else if (io_u->resid) {
36167d82 650 int bytes = io_u->xfer_buflen - io_u->resid;
d460eb31 651 struct fio_file *f = io_u->file;
36167d82 652
9e9d164e
JA
653 /*
654 * zero read, fail
655 */
656 if (!bytes) {
41d9f0fd 657 td_verror(td, EIO, "full resid");
9e9d164e
JA
658 put_io_u(td, io_u);
659 break;
660 }
661
cec6b55d 662 io_u->xfer_buflen = io_u->resid;
36167d82 663 io_u->xfer_buf += bytes;
5a7c5680
JA
664 io_u->offset += bytes;
665
ff58fced
JA
666 if (ddir_rw(io_u->ddir))
667 td->ts.short_io_u[io_u->ddir]++;
30061b97 668
d460eb31 669 if (io_u->offset == f->real_file_size)
5a7c5680
JA
670 goto sync_done;
671
11786802
JA
672 requeue_io_u(td, &io_u);
673 } else {
5a7c5680 674sync_done:
581e7141
JA
675 if (__should_check_rate(td, 0) ||
676 __should_check_rate(td, 1))
993bf48b
JA
677 fio_gettime(&comp_time, NULL);
678
581e7141
JA
679 ret = io_u_sync_complete(td, io_u, bytes_done);
680 if (ret < 0)
681 break;
cec6b55d 682 }
36167d82
JA
683 break;
684 case FIO_Q_QUEUED:
7e77dd02
JA
685 /*
686 * if the engine doesn't have a commit hook,
687 * the io_u is really queued. if it does have such
688 * a hook, it has to call io_u_queued() itself.
689 */
690 if (td->io_ops->commit == NULL)
691 io_u_queued(td, io_u);
36167d82 692 break;
755200a3
JA
693 case FIO_Q_BUSY:
694 requeue_io_u(td, &io_u);
5451792e
JA
695 ret2 = td_io_commit(td);
696 if (ret2 < 0)
697 ret = ret2;
755200a3 698 break;
36167d82
JA
699 default:
700 assert(ret < 0);
701 put_io_u(td, io_u);
702 break;
ebac4655
JA
703 }
704
f2bba182 705 if (break_on_this_error(td, &ret))
36167d82
JA
706 break;
707
97601024
JA
708 /*
709 * See if we need to complete some commands
710 */
4950421a
JA
711 full = queue_full(td) || ret == FIO_Q_BUSY;
712 if (full || !td->o.iodepth_batch_complete) {
6a96276c
RR
713 min_evts = min(td->o.iodepth_batch_complete,
714 td->cur_depth);
4950421a 715 if (full && !min_evts)
36167d82 716 min_evts = 1;
4950421a 717
581e7141
JA
718 if (__should_check_rate(td, 0) ||
719 __should_check_rate(td, 1))
993bf48b 720 fio_gettime(&comp_time, NULL);
4950421a
JA
721
722 do {
581e7141
JA
723 ret = io_u_queued_complete(td, min_evts, bytes_done);
724 if (ret < 0)
4950421a
JA
725 break;
726
4950421a 727 } while (full && (td->cur_depth > td->o.iodepth_low));
ebac4655
JA
728 }
729
4950421a
JA
730 if (ret < 0)
731 break;
581e7141 732 if (!(bytes_done[0] + bytes_done[1]))
97601024
JA
733 continue;
734
581e7141
JA
735 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
736 if (check_min_rate(td, &comp_time, bytes_done)) {
721938ae
JA
737 if (exitall_on_terminate)
738 terminate_threads(td->groupid);
739 td_verror(td, EIO, "check_min_rate");
740 break;
741 }
ebac4655
JA
742 }
743
2dc1bbeb 744 if (td->o.thinktime) {
9c1f7434
JA
745 unsigned long long b;
746
747 b = td->io_blocks[0] + td->io_blocks[1];
2dc1bbeb 748 if (!(b % td->o.thinktime_blocks)) {
48097d5c
JA
749 int left;
750
2dc1bbeb 751 if (td->o.thinktime_spin)
6dd6f2cd 752 usec_spin(td->o.thinktime_spin);
48097d5c 753
2dc1bbeb 754 left = td->o.thinktime - td->o.thinktime_spin;
48097d5c
JA
755 if (left)
756 usec_sleep(td, left);
757 }
9c1f7434 758 }
ebac4655
JA
759 }
760
d708ac5e
JA
761 if (td->trim_entries)
762 printf("trim entries %ld\n", td->trim_entries);
a917a8b3 763
aa31f1f1
SL
764 if (td->o.fill_device && td->error == ENOSPC) {
765 td->error = 0;
766 td->terminate = 1;
767 }
4d2413c6 768 if (!td->error) {
3d7c391d
JA
769 struct fio_file *f;
770
c01c0395
JA
771 i = td->cur_depth;
772 if (i)
581e7141 773 ret = io_u_queued_complete(td, i, NULL);
ebac4655 774
2dc1bbeb 775 if (should_fsync(td) && td->o.end_fsync) {
84585003 776 td_set_runstate(td, TD_FSYNCING);
3d7b485f
JA
777
778 for_each_file(td, f, i) {
d6aed795 779 if (!fio_file_open(f))
3d7b485f 780 continue;
858a3d47 781 fio_io_sync(td, f);
3d7b485f 782 }
84585003 783 }
c01c0395
JA
784 } else
785 cleanup_pending_aio(td);
2ba1c290
JA
786
787 /*
788 * stop job if we failed doing any IO
789 */
790 if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
791 td->done = 1;
ebac4655
JA
792}
793
ebac4655
JA
794static void cleanup_io_u(struct thread_data *td)
795{
01743ee1 796 struct flist_head *entry, *n;
ebac4655
JA
797 struct io_u *io_u;
798
01743ee1
JA
799 flist_for_each_safe(entry, n, &td->io_u_freelist) {
800 io_u = flist_entry(entry, struct io_u, list);
ebac4655 801
01743ee1 802 flist_del(&io_u->list);
ebac4655
JA
803 free(io_u);
804 }
805
2f9ade3c 806 free_io_mem(td);
ebac4655
JA
807}
808
809static int init_io_u(struct thread_data *td)
810{
811 struct io_u *io_u;
a00735e6 812 unsigned int max_bs;
eb7ccf38 813 int cl_align, i, max_units;
ebac4655
JA
814 char *p;
815
1e3c09af 816 max_units = td->o.iodepth;
2dc1bbeb 817 max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
5ec10eaa
JA
818 td->orig_buffer_size = (unsigned long long) max_bs
819 * (unsigned long long) max_units;
820
821 if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
822 unsigned long bs;
74b025b0 823
5ec10eaa
JA
824 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
825 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
826 }
ebac4655 827
c3990645
JA
828 if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
829 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
830 return 1;
831 }
832
2f9ade3c
JA
833 if (allocate_io_mem(td))
834 return 1;
ebac4655 835
1c04bf78
JA
836 if (td->o.odirect || td->o.mem_align ||
837 (td->io_ops->flags & FIO_RAWIO))
d529ee19 838 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
b3f378e9
JA
839 else
840 p = td->orig_buffer;
841
eb7ccf38
JA
842 cl_align = os_cache_line_size();
843
ebac4655 844 for (i = 0; i < max_units; i++) {
eb7ccf38
JA
845 void *ptr;
846
db1cd90b
JA
847 if (td->terminate)
848 return 1;
eb7ccf38
JA
849
850 if (posix_memalign(&ptr, cl_align, sizeof(*io_u))) {
851 log_err("fio: posix_memalign=%s\n", strerror(errno));
852 break;
853 }
854
855 io_u = ptr;
ebac4655 856 memset(io_u, 0, sizeof(*io_u));
01743ee1 857 INIT_FLIST_HEAD(&io_u->list);
d529ee19 858 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
ebac4655 859
b4c5e1ac
JA
860 if (!(td->io_ops->flags & FIO_NOIO)) {
861 io_u->buf = p + max_bs * i;
d529ee19 862 dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
e9459e5a 863
5973cafb
JA
864 if (td_write(td) && !td->o.refill_buffers)
865 io_u_fill_buffer(td, io_u, max_bs);
cbe8d756
RR
866 else if (td_write(td) && td->o.verify_pattern_bytes) {
867 /*
868 * Fill the buffer with the pattern if we are
869 * going to be doing writes.
870 */
7d9fb455 871 fill_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
cbe8d756 872 }
b4c5e1ac 873 }
6b9cea23 874
b1ff3403 875 io_u->index = i;
0c6e7517 876 io_u->flags = IO_U_F_FREE;
01743ee1 877 flist_add(&io_u->list, &td->io_u_freelist);
ebac4655
JA
878 }
879
880 return 0;
881}
882
da86774e
JA
883static int switch_ioscheduler(struct thread_data *td)
884{
885 char tmp[256], tmp2[128];
886 FILE *f;
887 int ret;
888
ba0fbe10 889 if (td->io_ops->flags & FIO_DISKLESSIO)
f48b467c
JA
890 return 0;
891
da86774e
JA
892 sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
893
894 f = fopen(tmp, "r+");
895 if (!f) {
cbf5c1d7 896 if (errno == ENOENT) {
5ec10eaa
JA
897 log_err("fio: os or kernel doesn't support IO scheduler"
898 " switching\n");
cbf5c1d7
JA
899 return 0;
900 }
901 td_verror(td, errno, "fopen iosched");
da86774e
JA
902 return 1;
903 }
904
905 /*
906 * Set io scheduler.
907 */
2dc1bbeb 908 ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
da86774e 909 if (ferror(f) || ret != 1) {
e1161c32 910 td_verror(td, errno, "fwrite");
da86774e
JA
911 fclose(f);
912 return 1;
913 }
914
915 rewind(f);
916
917 /*
918 * Read back and check that the selected scheduler is now the default.
919 */
920 ret = fread(tmp, 1, sizeof(tmp), f);
921 if (ferror(f) || ret < 0) {
e1161c32 922 td_verror(td, errno, "fread");
da86774e
JA
923 fclose(f);
924 return 1;
925 }
926
2dc1bbeb 927 sprintf(tmp2, "[%s]", td->o.ioscheduler);
da86774e 928 if (!strstr(tmp, tmp2)) {
2dc1bbeb 929 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
e1161c32 930 td_verror(td, EINVAL, "iosched_switch");
da86774e
JA
931 fclose(f);
932 return 1;
933 }
934
935 fclose(f);
936 return 0;
937}
938
492158cf
JA
939static int keep_running(struct thread_data *td)
940{
941 unsigned long long io_done;
942
20e354ef
JA
943 if (td->done)
944 return 0;
492158cf
JA
945 if (td->o.time_based)
946 return 1;
947 if (td->o.loops) {
948 td->o.loops--;
949 return 1;
950 }
951
5ec10eaa
JA
952 io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
953 + td->io_skip_bytes;
492158cf
JA
954 if (io_done < td->o.size)
955 return 1;
956
957 return 0;
958}
959
b29ee5b3 960static void reset_io_counters(struct thread_data *td)
ebac4655 961{
756867bd 962 td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
ebac4655 963 td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
20dc95c4 964 td->zone_bytes = 0;
581e7141
JA
965 td->rate_bytes[0] = td->rate_bytes[1] = 0;
966 td->rate_blocks[0] = td->rate_blocks[1] = 0;
ebac4655 967
c1324df1
JA
968 td->last_was_sync = 0;
969
2ba1c290
JA
970 /*
971 * reset file done count if we are to start over
972 */
973 if (td->o.time_based || td->o.loops)
48f5abd3 974 td->nr_done_files = 0;
5bfc35d7
JA
975
976 /*
977 * Set the same seed to get repeatable runs
978 */
979 td_fill_rand_seeds(td);
b29ee5b3
JA
980}
981
982void reset_all_stats(struct thread_data *td)
983{
984 struct timeval tv;
985 int i;
986
987 reset_io_counters(td);
988
989 for (i = 0; i < 2; i++) {
990 td->io_bytes[i] = 0;
991 td->io_blocks[i] = 0;
992 td->io_issues[i] = 0;
993 td->ts.total_io_u[i] = 0;
994 }
9b836561 995
b29ee5b3 996 fio_gettime(&tv, NULL);
cda99fa0
SSP
997 td->ts.runtime[0] = 0;
998 td->ts.runtime[1] = 0;
b29ee5b3
JA
999 memcpy(&td->epoch, &tv, sizeof(tv));
1000 memcpy(&td->start, &tv, sizeof(tv));
1001}
1002
df9c26b1 1003static void clear_io_state(struct thread_data *td)
b29ee5b3
JA
1004{
1005 struct fio_file *f;
1006 unsigned int i;
b29ee5b3
JA
1007
1008 reset_io_counters(td);
281f9b63 1009
24ffd2c2 1010 close_files(td);
df9c26b1 1011 for_each_file(td, f, i)
d6aed795 1012 fio_file_clear_done(f);
ebac4655
JA
1013}
1014
398e8c4d
JA
1015static int exec_string(const char *string)
1016{
1017 int ret, newlen = strlen(string) + 1 + 8;
1018 char *str;
1019
1020 str = malloc(newlen);
1021 sprintf(str, "sh -c %s", string);
1022
1023 ret = system(str);
1024 if (ret == -1)
1025 log_err("fio: exec of cmd <%s> failed\n", str);
1026
1027 free(str);
1028 return ret;
1029}
1030
906c8d75
JA
1031/*
1032 * Entry point for the thread based jobs. The process based jobs end up
1033 * here as well, after a little setup.
1034 */
ebac4655
JA
1035static void *thread_main(void *data)
1036{
cda99fa0 1037 unsigned long long elapsed;
ebac4655 1038 struct thread_data *td = data;
e8462bd8 1039 pthread_condattr_t attr;
a978ba68 1040 int clear_state;
ebac4655 1041
2dc1bbeb 1042 if (!td->o.use_thread)
ebac4655
JA
1043 setsid();
1044
1045 td->pid = getpid();
1046
5921e80c 1047 dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
ee56ad50 1048
01743ee1
JA
1049 INIT_FLIST_HEAD(&td->io_u_freelist);
1050 INIT_FLIST_HEAD(&td->io_u_busylist);
1051 INIT_FLIST_HEAD(&td->io_u_requeues);
1052 INIT_FLIST_HEAD(&td->io_log_list);
1053 INIT_FLIST_HEAD(&td->io_hist_list);
e8462bd8 1054 INIT_FLIST_HEAD(&td->verify_list);
0d29de83 1055 INIT_FLIST_HEAD(&td->trim_list);
e8462bd8 1056 pthread_mutex_init(&td->io_u_lock, NULL);
bb5d7d0b 1057 td->io_hist_tree = RB_ROOT;
aea47d44 1058
e8462bd8
JA
1059 pthread_condattr_init(&attr);
1060 pthread_cond_init(&td->verify_cond, &attr);
1061 pthread_cond_init(&td->free_cond, &attr);
1062
db1cd90b 1063 td_set_runstate(td, TD_INITIALIZED);
29adda3c 1064 dprint(FD_MUTEX, "up startup_mutex\n");
cdd18ad8 1065 fio_mutex_up(startup_mutex);
29adda3c 1066 dprint(FD_MUTEX, "wait on td->mutex\n");
cdd18ad8 1067 fio_mutex_down(td->mutex);
29adda3c 1068 dprint(FD_MUTEX, "done waiting on td->mutex\n");
db1cd90b
JA
1069
1070 /*
cdd18ad8 1071 * the ->mutex mutex is now no longer used, close it to avoid
db1cd90b
JA
1072 * eating a file descriptor
1073 */
cdd18ad8 1074 fio_mutex_remove(td->mutex);
db1cd90b 1075
dfc6e751
SH
1076 /*
1077 * A new gid requires privilege, so we need to do this before setting
1078 * the uid.
1079 */
e0b0d892
JA
1080 if (td->o.gid != -1U && setgid(td->o.gid)) {
1081 td_verror(td, errno, "setgid");
1082 goto err;
1083 }
dfc6e751
SH
1084 if (td->o.uid != -1U && setuid(td->o.uid)) {
1085 td_verror(td, errno, "setuid");
1086 goto err;
1087 }
e0b0d892 1088
d84f8d49
JA
1089 /*
1090 * May alter parameters that init_io_u() will use, so we need to
1091 * do this first.
1092 */
1093 if (init_iolog(td))
1094 goto err;
1095
ebac4655 1096 if (init_io_u(td))
db1cd90b 1097 goto err;
ebac4655 1098
e8462bd8
JA
1099 if (td->o.verify_async && verify_async_init(td))
1100 goto err;
1101
1102 if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
e1161c32 1103 td_verror(td, errno, "cpu_set_affinity");
db1cd90b 1104 goto err;
ebac4655
JA
1105 }
1106
f484470b
JA
1107 /*
1108 * If we have a gettimeofday() thread, make sure we exclude that
1109 * thread from this job
1110 */
be4ecfdf 1111 if (td->o.gtod_cpu) {
be4ecfdf 1112 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
e8462bd8 1113 if (fio_setaffinity(td->pid, td->o.cpumask) == -1) {
be4ecfdf
JA
1114 td_verror(td, errno, "cpu_set_affinity");
1115 goto err;
1116 }
1117 }
1118
ac684785 1119 if (td->ioprio_set) {
ebac4655 1120 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
e1161c32 1121 td_verror(td, errno, "ioprio_set");
db1cd90b 1122 goto err;
ebac4655
JA
1123 }
1124 }
1125
6adb38a1 1126 if (td->o.cgroup_weight && cgroup_setup(td, cgroup_list, &cgroup_mnt))
a696fa2a
JA
1127 goto err;
1128
2dc1bbeb 1129 if (nice(td->o.nice) == -1) {
e1161c32 1130 td_verror(td, errno, "nice");
db1cd90b 1131 goto err;
b6f4d880
JA
1132 }
1133
2dc1bbeb 1134 if (td->o.ioscheduler && switch_ioscheduler(td))
db1cd90b 1135 goto err;
37f56873 1136
2dc1bbeb 1137 if (!td->o.create_serialize && setup_files(td))
ebac4655
JA
1138 goto err;
1139
7d6c5283
JA
1140 if (td_io_init(td))
1141 goto err;
1142
68727076
JA
1143 if (init_random_map(td))
1144 goto err;
1145
2dc1bbeb 1146 if (td->o.exec_prerun) {
398e8c4d 1147 if (exec_string(td->o.exec_prerun))
69cfd7e0
JA
1148 goto err;
1149 }
4e0ba8af 1150
afad68f7
ZY
1151 if (td->o.pre_read) {
1152 if (pre_read_files(td) < 0)
1153 goto err;
1154 }
1155
69008999 1156 fio_gettime(&td->epoch, NULL);
756867bd 1157 getrusage(RUSAGE_SELF, &td->ts.ru_start);
69008999 1158
a978ba68 1159 clear_state = 0;
492158cf 1160 while (keep_running(td)) {
02bcaa8c 1161 fio_gettime(&td->start, NULL);
c5d3d790
JA
1162 memcpy(&td->ts.stat_sample_time[0], &td->start,
1163 sizeof(td->start));
1164 memcpy(&td->ts.stat_sample_time[1], &td->start,
1165 sizeof(td->start));
993bf48b 1166 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
ebac4655 1167
cf2dd8d6 1168 if (td->o.ratemin[0] || td->o.ratemin[1])
5ec10eaa
JA
1169 memcpy(&td->lastrate, &td->ts.stat_sample_time,
1170 sizeof(td->lastrate));
ebac4655 1171
df9c26b1
JA
1172 if (clear_state)
1173 clear_io_state(td);
a978ba68 1174
ebac4655
JA
1175 prune_io_piece_log(td);
1176
ba0fbe10 1177 do_io(td);
ebac4655 1178
a978ba68
JA
1179 clear_state = 1;
1180
38d77cae 1181 if (td_read(td) && td->io_bytes[DDIR_READ]) {
0a4957c6 1182 elapsed = utime_since_now(&td->start);
cda99fa0 1183 td->ts.runtime[DDIR_READ] += elapsed;
38d77cae
JA
1184 }
1185 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
0a4957c6 1186 elapsed = utime_since_now(&td->start);
cda99fa0 1187 td->ts.runtime[DDIR_WRITE] += elapsed;
38d77cae 1188 }
5ec10eaa 1189
ebac4655
JA
1190 if (td->error || td->terminate)
1191 break;
1192
e84c73a8
SL
1193 if (!td->o.do_verify ||
1194 td->o.verify == VERIFY_NONE ||
b67740d3 1195 (td->io_ops->flags & FIO_UNIDIR))
ebac4655
JA
1196 continue;
1197
df9c26b1 1198 clear_io_state(td);
a978ba68 1199
02bcaa8c 1200 fio_gettime(&td->start, NULL);
ebac4655
JA
1201
1202 do_verify(td);
1203
cda99fa0 1204 td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
ebac4655
JA
1205
1206 if (td->error || td->terminate)
1207 break;
1208 }
1209
36dff966 1210 update_rusage_stat(td);
cda99fa0
SSP
1211 td->ts.runtime[0] = (td->ts.runtime[0] + 999) / 1000;
1212 td->ts.runtime[1] = (td->ts.runtime[1] + 999) / 1000;
756867bd
JA
1213 td->ts.total_run_time = mtime_since_now(&td->epoch);
1214 td->ts.io_bytes[0] = td->io_bytes[0];
1215 td->ts.io_bytes[1] = td->io_bytes[1];
1216
d2bbb8d9 1217 fio_mutex_down(writeout_mutex);
e3cedca7 1218 if (td->ts.bw_log) {
f484470b
JA
1219 if (td->o.bw_log_file) {
1220 finish_log_named(td, td->ts.bw_log,
1221 td->o.bw_log_file, "bw");
1222 } else
e3cedca7
JA
1223 finish_log(td, td->ts.bw_log, "bw");
1224 }
02af0988
JA
1225 if (td->ts.lat_log) {
1226 if (td->o.lat_log_file) {
1227 finish_log_named(td, td->ts.lat_log,
1228 td->o.lat_log_file, "lat");
1229 } else
1230 finish_log(td, td->ts.lat_log, "lat");
1231 }
e3cedca7 1232 if (td->ts.slat_log) {
f484470b
JA
1233 if (td->o.lat_log_file) {
1234 finish_log_named(td, td->ts.slat_log,
1ca95738 1235 td->o.lat_log_file, "slat");
f484470b 1236 } else
e3cedca7
JA
1237 finish_log(td, td->ts.slat_log, "slat");
1238 }
1239 if (td->ts.clat_log) {
f484470b
JA
1240 if (td->o.lat_log_file) {
1241 finish_log_named(td, td->ts.clat_log,
1242 td->o.lat_log_file, "clat");
1243 } else
e3cedca7
JA
1244 finish_log(td, td->ts.clat_log, "clat");
1245 }
d2bbb8d9 1246 fio_mutex_up(writeout_mutex);
398e8c4d
JA
1247 if (td->o.exec_postrun)
1248 exec_string(td->o.exec_postrun);
ebac4655
JA
1249
1250 if (exitall_on_terminate)
390c40e2 1251 terminate_threads(td->groupid);
ebac4655
JA
1252
1253err:
5bf13a5a 1254 if (td->error)
4ceb30d4 1255 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
5ec10eaa 1256 td->verror);
b4707ed7
JA
1257
1258 if (td->o.verify_async)
1259 verify_async_exit(td);
1260
24ffd2c2 1261 close_and_free_files(td);
2866c82d 1262 close_ioengine(td);
ebac4655 1263 cleanup_io_u(td);
6adb38a1 1264 cgroup_shutdown(td, &cgroup_mnt);
f29b25a3 1265
d2ce18b5
JA
1266 if (td->o.cpumask_set) {
1267 int ret = fio_cpuset_exit(&td->o.cpumask);
1268
1269 td_verror(td, ret, "fio_cpuset_exit");
1270 }
4e78e405 1271
f29b25a3
JA
1272 /*
1273 * do this very late, it will log file closing as well
1274 */
1275 if (td->o.write_iolog_file)
1276 write_iolog_close(td);
1277
d23bb327 1278 options_mem_free(td);
ebac4655 1279 td_set_runstate(td, TD_EXITED);
43d76807 1280 return (void *) (unsigned long) td->error;
ebac4655
JA
1281}
1282
906c8d75
JA
1283/*
1284 * We cannot pass the td data into a forked process, so attach the td and
1285 * pass it to the thread worker.
1286 */
a6418147 1287static int fork_main(int shmid, int offset)
ebac4655
JA
1288{
1289 struct thread_data *td;
a6418147 1290 void *data, *ret;
ebac4655
JA
1291
1292 data = shmat(shmid, NULL, 0);
1293 if (data == (void *) -1) {
a6418147
JA
1294 int __err = errno;
1295
ebac4655 1296 perror("shmat");
a6418147 1297 return __err;
ebac4655
JA
1298 }
1299
1300 td = data + offset * sizeof(struct thread_data);
a6418147 1301 ret = thread_main(td);
ebac4655 1302 shmdt(data);
43d76807 1303 return (int) (unsigned long) ret;
ebac4655
JA
1304}
1305
906c8d75
JA
1306/*
1307 * Run over the job map and reap the threads that have exited, if any.
1308 */
ebac4655
JA
1309static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1310{
34572e28 1311 struct thread_data *td;
1f809d15 1312 int i, cputhreads, realthreads, pending, status, ret;
ebac4655
JA
1313
1314 /*
1315 * reap exited threads (TD_EXITED -> TD_REAPED)
1316 */
1f809d15 1317 realthreads = pending = cputhreads = 0;
34572e28 1318 for_each_td(td, i) {
3707f45b 1319 int flags = 0;
a2f77c9f 1320
84585003
JA
1321 /*
1322 * ->io_ops is NULL for a thread that has closed its
1323 * io engine
1324 */
ba0fbe10 1325 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
b990b5c0 1326 cputhreads++;
1f809d15
JA
1327 else
1328 realthreads++;
b990b5c0 1329
a1dedc1f
AC
1330 if (!td->pid) {
1331 pending++;
1332 continue;
1333 }
1334 if (td->runstate == TD_REAPED)
a2f77c9f 1335 continue;
2dc1bbeb 1336 if (td->o.use_thread) {
3707f45b
JA
1337 if (td->runstate == TD_EXITED) {
1338 td_set_runstate(td, TD_REAPED);
1339 goto reaped;
1340 }
1341 continue;
1342 }
a2f77c9f
JA
1343
1344 flags = WNOHANG;
1345 if (td->runstate == TD_EXITED)
1346 flags = 0;
1347
1348 /*
1349 * check if someone quit or got killed in an unusual way
1350 */
1351 ret = waitpid(td->pid, &status, flags);
3707f45b 1352 if (ret < 0) {
a2f77c9f 1353 if (errno == ECHILD) {
5921e80c
JA
1354 log_err("fio: pid=%d disappeared %d\n",
1355 (int) td->pid, td->runstate);
a2f77c9f
JA
1356 td_set_runstate(td, TD_REAPED);
1357 goto reaped;
1358 }
1359 perror("waitpid");
1360 } else if (ret == td->pid) {
1361 if (WIFSIGNALED(status)) {
fab6aa71
JA
1362 int sig = WTERMSIG(status);
1363
03e20d68 1364 if (sig != SIGTERM)
5ec10eaa 1365 log_err("fio: pid=%d, got signal=%d\n",
5921e80c 1366 (int) td->pid, sig);
fab6aa71
JA
1367 td_set_runstate(td, TD_REAPED);
1368 goto reaped;
1369 }
a2f77c9f
JA
1370 if (WIFEXITED(status)) {
1371 if (WEXITSTATUS(status) && !td->error)
1372 td->error = WEXITSTATUS(status);
a2f77c9f 1373
a2f77c9f
JA
1374 td_set_runstate(td, TD_REAPED);
1375 goto reaped;
a6418147
JA
1376 }
1377 }
ebac4655 1378
a2f77c9f
JA
1379 /*
1380 * thread is not dead, continue
1381 */
e48676ba 1382 pending++;
a2f77c9f 1383 continue;
fab6aa71 1384reaped:
ebac4655 1385 (*nr_running)--;
581e7141
JA
1386 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1387 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
6f88bcb0
JA
1388 if (!td->pid)
1389 pending--;
a2f77c9f
JA
1390
1391 if (td->error)
1392 exit_value++;
d3eeeabc
JA
1393
1394 done_secs += mtime_since_now(&td->epoch) / 1000;
ebac4655 1395 }
b990b5c0 1396
1f809d15 1397 if (*nr_running == cputhreads && !pending && realthreads)
390c40e2 1398 terminate_threads(TERMINATE_ALL);
ebac4655
JA
1399}
1400
be4ecfdf
JA
1401static void *gtod_thread_main(void *data)
1402{
1403 fio_mutex_up(startup_mutex);
1404
1405 /*
1406 * As long as we have jobs around, update the clock. It would be nice
1407 * to have some way of NOT hammering that CPU with gettimeofday(),
1408 * but I'm not sure what to use outside of a simple CPU nop to relax
1409 * it - we don't want to lose precision.
1410 */
1411 while (threads) {
1412 fio_gtod_update();
1413 nop;
1414 }
1415
1416 return NULL;
1417}
1418
1419static int fio_start_gtod_thread(void)
1420{
304a47c7 1421 pthread_attr_t attr;
f42c153d
JA
1422 int ret;
1423
304a47c7
VA
1424 pthread_attr_init(&attr);
1425 pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1426 ret = pthread_create(&gtod_thread, &attr, gtod_thread_main, NULL);
1427 pthread_attr_destroy(&attr);
f42c153d
JA
1428 if (ret) {
1429 log_err("Can't create gtod thread: %s\n", strerror(ret));
be4ecfdf
JA
1430 return 1;
1431 }
f42c153d
JA
1432
1433 ret = pthread_detach(gtod_thread);
1434 if (ret) {
1435 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
be4ecfdf
JA
1436 return 1;
1437 }
1438
29adda3c 1439 dprint(FD_MUTEX, "wait on startup_mutex\n");
be4ecfdf 1440 fio_mutex_down(startup_mutex);
29adda3c 1441 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
be4ecfdf
JA
1442 return 0;
1443}
1444
906c8d75
JA
1445/*
1446 * Main function for kicking off and reaping jobs, as needed.
1447 */
ebac4655
JA
1448static void run_threads(void)
1449{
ebac4655
JA
1450 struct thread_data *td;
1451 unsigned long spent;
1452 int i, todo, nr_running, m_rate, t_rate, nr_started;
fcb6ade2 1453
2f9ade3c
JA
1454 if (fio_pin_memory())
1455 return;
ebac4655 1456
be4ecfdf
JA
1457 if (fio_gtod_offload && fio_start_gtod_thread())
1458 return;
1459
c6ae0a5b 1460 if (!terse_output) {
4ceb30d4 1461 log_info("Starting ");
9cedf167 1462 if (nr_thread)
4ceb30d4 1463 log_info("%d thread%s", nr_thread,
5ec10eaa 1464 nr_thread > 1 ? "s" : "");
9cedf167
JA
1465 if (nr_process) {
1466 if (nr_thread)
1467 printf(" and ");
4ceb30d4 1468 log_info("%d process%s", nr_process,
5ec10eaa 1469 nr_process > 1 ? "es" : "");
9cedf167 1470 }
4ceb30d4 1471 log_info("\n");
c6ae0a5b
JA
1472 fflush(stdout);
1473 }
c04f7ec3 1474
697a606c 1475 set_sig_handlers();
4efa970e 1476
ebac4655
JA
1477 todo = thread_number;
1478 nr_running = 0;
1479 nr_started = 0;
1480 m_rate = t_rate = 0;
1481
34572e28 1482 for_each_td(td, i) {
263e529f 1483 print_status_init(td->thread_number - 1);
ebac4655 1484
2dc1bbeb 1485 if (!td->o.create_serialize) {
380cf265 1486 init_disk_util(td);
ebac4655 1487 continue;
380cf265 1488 }
ebac4655
JA
1489
1490 /*
1491 * do file setup here so it happens sequentially,
1492 * we don't want X number of threads getting their
1493 * client data interspersed on disk
1494 */
53cdc686 1495 if (setup_files(td)) {
5bf13a5a
JA
1496 exit_value++;
1497 if (td->error)
5921e80c
JA
1498 log_err("fio: pid=%d, err=%d/%s\n",
1499 (int) td->pid, td->error, td->verror);
ebac4655
JA
1500 td_set_runstate(td, TD_REAPED);
1501 todo--;
c69e8875
JA
1502 } else {
1503 struct fio_file *f;
1504 unsigned int i;
1505
1506 /*
1507 * for sharing to work, each job must always open
1508 * its own files. so close them, if we opened them
1509 * for creation
1510 */
22a57ba8
JA
1511 for_each_file(td, f, i) {
1512 if (fio_file_open(f))
1513 td_io_close_file(td, f);
22a57ba8 1514 }
5ec10eaa 1515 }
380cf265
JA
1516
1517 init_disk_util(td);
ebac4655
JA
1518 }
1519
a2f77c9f
JA
1520 set_genesis_time();
1521
ebac4655 1522 while (todo) {
75154845
JA
1523 struct thread_data *map[MAX_JOBS];
1524 struct timeval this_start;
1525 int this_jobs = 0, left;
1526
ebac4655
JA
1527 /*
1528 * create threads (TD_NOT_CREATED -> TD_CREATED)
1529 */
34572e28 1530 for_each_td(td, i) {
ebac4655
JA
1531 if (td->runstate != TD_NOT_CREATED)
1532 continue;
1533
1534 /*
1535 * never got a chance to start, killed by other
1536 * thread for some reason
1537 */
1538 if (td->terminate) {
1539 todo--;
1540 continue;
1541 }
1542
2dc1bbeb 1543 if (td->o.start_delay) {
263e529f 1544 spent = mtime_since_genesis();
ebac4655 1545
2dc1bbeb 1546 if (td->o.start_delay * 1000 > spent)
ebac4655
JA
1547 continue;
1548 }
1549
6f88bcb0
JA
1550 if (td->o.stonewall && (nr_started || nr_running)) {
1551 dprint(FD_PROCESS, "%s: stonewall wait\n",
1552 td->o.name);
ebac4655 1553 break;
6f88bcb0 1554 }
ebac4655 1555
75154845
JA
1556 /*
1557 * Set state to created. Thread will transition
1558 * to TD_INITIALIZED when it's done setting up.
1559 */
ebac4655 1560 td_set_runstate(td, TD_CREATED);
75154845 1561 map[this_jobs++] = td;
ebac4655
JA
1562 nr_started++;
1563
2dc1bbeb 1564 if (td->o.use_thread) {
f42c153d
JA
1565 int ret;
1566
ee56ad50 1567 dprint(FD_PROCESS, "will pthread_create\n");
f42c153d
JA
1568 ret = pthread_create(&td->thread, NULL,
1569 thread_main, td);
1570 if (ret) {
1571 log_err("pthread_create: %s\n",
1572 strerror(ret));
ebac4655 1573 nr_started--;
c8bb6faf 1574 break;
ebac4655 1575 }
f42c153d
JA
1576 ret = pthread_detach(td->thread);
1577 if (ret)
1578 log_err("pthread_detach: %s",
1579 strerror(ret));
ebac4655 1580 } else {
5e1d306e 1581 pid_t pid;
ee56ad50 1582 dprint(FD_PROCESS, "will fork\n");
5e1d306e
JA
1583 pid = fork();
1584 if (!pid) {
a6418147
JA
1585 int ret = fork_main(shm_id, i);
1586
5e1d306e
JA
1587 _exit(ret);
1588 } else if (i == fio_debug_jobno)
1589 *fio_debug_jobp = pid;
ebac4655 1590 }
29adda3c 1591 dprint(FD_MUTEX, "wait on startup_mutex\n");
656b1393
JA
1592 if (fio_mutex_down_timeout(startup_mutex, 10)) {
1593 log_err("fio: job startup hung? exiting.\n");
1594 terminate_threads(TERMINATE_ALL);
1595 fio_abort = 1;
1596 nr_started--;
1597 break;
1598 }
29adda3c 1599 dprint(FD_MUTEX, "done waiting on startup_mutex\n");
ebac4655
JA
1600 }
1601
1602 /*
75154845
JA
1603 * Wait for the started threads to transition to
1604 * TD_INITIALIZED.
ebac4655 1605 */
02bcaa8c 1606 fio_gettime(&this_start, NULL);
75154845 1607 left = this_jobs;
6ce15a32 1608 while (left && !fio_abort) {
75154845
JA
1609 if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1610 break;
1611
1612 usleep(100000);
1613
1614 for (i = 0; i < this_jobs; i++) {
1615 td = map[i];
1616 if (!td)
1617 continue;
b6f4d880 1618 if (td->runstate == TD_INITIALIZED) {
75154845
JA
1619 map[i] = NULL;
1620 left--;
b6f4d880
JA
1621 } else if (td->runstate >= TD_EXITED) {
1622 map[i] = NULL;
1623 left--;
1624 todo--;
1625 nr_running++; /* work-around... */
75154845
JA
1626 }
1627 }
1628 }
1629
1630 if (left) {
3b70d7e5 1631 log_err("fio: %d jobs failed to start\n", left);
75154845
JA
1632 for (i = 0; i < this_jobs; i++) {
1633 td = map[i];
1634 if (!td)
1635 continue;
1636 kill(td->pid, SIGTERM);
1637 }
1638 break;
1639 }
1640
1641 /*
b6f4d880 1642 * start created threads (TD_INITIALIZED -> TD_RUNNING).
75154845 1643 */
34572e28 1644 for_each_td(td, i) {
75154845 1645 if (td->runstate != TD_INITIALIZED)
ebac4655
JA
1646 continue;
1647
b29ee5b3
JA
1648 if (in_ramp_time(td))
1649 td_set_runstate(td, TD_RAMP);
1650 else
1651 td_set_runstate(td, TD_RUNNING);
ebac4655
JA
1652 nr_running++;
1653 nr_started--;
581e7141
JA
1654 m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1655 t_rate += td->o.rate[0] + td->o.rate[1];
75154845 1656 todo--;
cdd18ad8 1657 fio_mutex_up(td->mutex);
ebac4655
JA
1658 }
1659
1660 reap_threads(&nr_running, &t_rate, &m_rate);
1661
1662 if (todo)
1663 usleep(100000);
1664 }
1665
1666 while (nr_running) {
1667 reap_threads(&nr_running, &t_rate, &m_rate);
1668 usleep(10000);
1669 }
1670
1671 update_io_ticks();
2f9ade3c 1672 fio_unpin_memory();
ebac4655
JA
1673}
1674
ebac4655
JA
1675int main(int argc, char *argv[])
1676{
29d610e1
JA
1677 long ps;
1678
2e5cdb11 1679 sinit();
d54a144d 1680 init_rand(&__fio_rand_state);
2e5cdb11 1681
dbe1125e
JA
1682 /*
1683 * We need locale for number printing, if it isn't set then just
1684 * go with the US format.
1685 */
1686 if (!getenv("LC_NUMERIC"))
1687 setlocale(LC_NUMERIC, "en_US");
1688
29d610e1
JA
1689 ps = sysconf(_SC_PAGESIZE);
1690 if (ps < 0) {
1691 log_err("Failed to get page size\n");
1692 return 1;
1693 }
1694
cfc99db7 1695 page_size = ps;
29d610e1
JA
1696 page_mask = ps - 1;
1697
74929ac2
JA
1698 fio_keywords_init();
1699
1700 if (parse_options(argc, argv))
1701 return 1;
1702
07b3232d
JA
1703 if (exec_profile && load_profile(exec_profile))
1704 return 1;
1705
74929ac2
JA
1706 if (!thread_number)
1707 return 0;
1708
bb3884d8
JA
1709 if (write_bw_log) {
1710 setup_log(&agg_io_log[DDIR_READ]);
1711 setup_log(&agg_io_log[DDIR_WRITE]);
1712 }
1713
cdd18ad8 1714 startup_mutex = fio_mutex_init(0);
03e20d68
BC
1715 if (startup_mutex == NULL)
1716 return 1;
d2bbb8d9 1717 writeout_mutex = fio_mutex_init(1);
03e20d68
BC
1718 if (writeout_mutex == NULL)
1719 return 1;
07739b57 1720
a2f77c9f 1721 set_genesis_time();
7985701b 1722 create_disk_util_thread();
ebac4655 1723
dae5341c
JA
1724 cgroup_list = smalloc(sizeof(*cgroup_list));
1725 INIT_FLIST_HEAD(cgroup_list);
1726
ebac4655 1727 run_threads();
6ce15a32 1728
bb3884d8 1729 if (!fio_abort) {
6ce15a32 1730 show_run_stats();
bb3884d8 1731 if (write_bw_log) {
5ec10eaa
JA
1732 __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1733 __finish_log(agg_io_log[DDIR_WRITE],
1734 "agg-write_bw.log");
bb3884d8
JA
1735 }
1736 }
ebac4655 1737
dae5341c
JA
1738 cgroup_kill(cgroup_list);
1739 sfree(cgroup_list);
61eb313e 1740 sfree(cgroup_mnt);
39f22027 1741
cdd18ad8 1742 fio_mutex_remove(startup_mutex);
d2bbb8d9 1743 fio_mutex_remove(writeout_mutex);
437c9b71 1744 return exit_value;
ebac4655 1745}