Clean core files on make clean
[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"
38#include "os.h"
39
29d610e1
JA
40static unsigned long page_mask;
41#define ALIGN(buf) \
42 (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
ebac4655
JA
43
44int groupid = 0;
45int thread_number = 0;
ebac4655 46int shm_id = 0;
53cdc686 47int temp_stall_ts;
ebac4655 48
bbfd6b00 49static volatile int startup_sem;
6ce15a32 50static volatile int fio_abort;
437c9b71 51static int exit_value;
ebac4655 52
bb3884d8
JA
53struct io_log *agg_io_log[2];
54
ebac4655 55#define TERMINATE_ALL (-1)
75154845 56#define JOB_START_TIMEOUT (5 * 1000)
ebac4655 57
6ce15a32
JA
58static inline void td_set_runstate(struct thread_data *td, int runstate)
59{
60 td->runstate = runstate;
61}
62
63static void terminate_threads(int group_id, int forced_kill)
ebac4655 64{
34572e28 65 struct thread_data *td;
ebac4655
JA
66 int i;
67
34572e28 68 for_each_td(td, i) {
ebac4655
JA
69 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
70 td->terminate = 1;
71 td->start_delay = 0;
6ce15a32
JA
72 if (forced_kill)
73 td_set_runstate(td, TD_EXITED);
ebac4655
JA
74 }
75 }
76}
77
78static void sig_handler(int sig)
79{
80 switch (sig) {
81 case SIGALRM:
82 update_io_ticks();
83 disk_util_timer_arm();
84 print_thread_status();
85 break;
86 default:
6ce15a32 87 printf("\nfio: terminating on signal %d\n", sig);
ebac4655 88 fflush(stdout);
6ce15a32 89 terminate_threads(TERMINATE_ALL, 0);
ebac4655
JA
90 break;
91 }
92}
93
906c8d75
JA
94/*
95 * Check if we are above the minimum rate given.
96 */
ebac4655
JA
97static int check_min_rate(struct thread_data *td, struct timeval *now)
98{
99 unsigned long spent;
100 unsigned long rate;
101 int ddir = td->ddir;
102
103 /*
104 * allow a 2 second settle period in the beginning
105 */
106 if (mtime_since(&td->start, now) < 2000)
107 return 0;
108
109 /*
110 * if rate blocks is set, sample is running
111 */
112 if (td->rate_bytes) {
113 spent = mtime_since(&td->lastrate, now);
114 if (spent < td->ratecycle)
115 return 0;
116
117 rate = (td->this_io_bytes[ddir] - td->rate_bytes) / spent;
118 if (rate < td->ratemin) {
1e97cce9 119 fprintf(f_out, "%s: min rate %u not met, got %luKiB/sec\n", td->name, td->ratemin, rate);
ebac4655
JA
120 return 1;
121 }
122 }
123
124 td->rate_bytes = td->this_io_bytes[ddir];
125 memcpy(&td->lastrate, now, sizeof(*now));
126 return 0;
127}
128
129static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
130{
131 if (!td->timeout)
132 return 0;
133 if (mtime_since(&td->epoch, t) >= td->timeout * 1000)
134 return 1;
135
136 return 0;
137}
138
906c8d75
JA
139/*
140 * When job exits, we can cancel the in-flight IO if we are using async
141 * io. Attempt to do so.
142 */
ebac4655
JA
143static void cleanup_pending_aio(struct thread_data *td)
144{
ebac4655 145 struct list_head *entry, *n;
ebac4655
JA
146 struct io_u *io_u;
147 int r;
148
149 /*
150 * get immediately available events, if any
151 */
97601024 152 io_u_queued_complete(td, 0, NULL);
ebac4655
JA
153
154 /*
155 * now cancel remaining active events
156 */
2866c82d 157 if (td->io_ops->cancel) {
ebac4655
JA
158 list_for_each_safe(entry, n, &td->io_u_busylist) {
159 io_u = list_entry(entry, struct io_u, list);
160
2866c82d 161 r = td->io_ops->cancel(td, io_u);
ebac4655
JA
162 if (!r)
163 put_io_u(td, io_u);
164 }
165 }
166
97601024
JA
167 if (td->cur_depth)
168 io_u_queued_complete(td, td->cur_depth, NULL);
ebac4655
JA
169}
170
858a3d47
JA
171/*
172 * Helper to handle the final sync of a file. Works just like the normal
173 * io path, just does everything sync.
174 */
175static int fio_io_sync(struct thread_data *td, struct fio_file *f)
176{
177 struct io_u *io_u = __get_io_u(td);
858a3d47
JA
178 int ret;
179
180 if (!io_u)
181 return 1;
182
183 io_u->ddir = DDIR_SYNC;
184 io_u->file = f;
185
186 if (td_io_prep(td, io_u)) {
187 put_io_u(td, io_u);
188 return 1;
189 }
190
755200a3 191requeue:
858a3d47 192 ret = td_io_queue(td, io_u);
36167d82 193 if (ret < 0) {
353a7e0e 194 td_verror(td, io_u->error);
858a3d47 195 put_io_u(td, io_u);
858a3d47 196 return 1;
36167d82 197 } else if (ret == FIO_Q_QUEUED) {
97601024 198 if (io_u_queued_complete(td, 1, NULL))
36167d82 199 return 1;
36167d82
JA
200 } else if (ret == FIO_Q_COMPLETED) {
201 if (io_u->error) {
202 td_verror(td, io_u->error);
203 return 1;
204 }
858a3d47 205
97601024 206 io_u_sync_complete(td, io_u, NULL);
755200a3
JA
207 } else if (ret == FIO_Q_BUSY) {
208 if (td_io_commit(td))
209 return 1;
210 goto requeue;
858a3d47
JA
211 }
212
213 return 0;
214}
215
906c8d75
JA
216/*
217 * The main verify engine. Runs over the writes we previusly submitted,
218 * reads the blocks back in, and checks the crc/md5 of the data.
219 */
1e97cce9 220static void do_verify(struct thread_data *td)
ebac4655 221{
53cdc686 222 struct fio_file *f;
36167d82 223 struct io_u *io_u;
3af6ef39 224 int ret, i, min_events;
e5b401d4
JA
225
226 /*
227 * sync io first and invalidate cache, to make sure we really
228 * read from disk.
229 */
230 for_each_file(td, f, i) {
858a3d47 231 fio_io_sync(td, f);
e5b401d4
JA
232 file_invalidate_cache(td, f);
233 }
ebac4655
JA
234
235 td_set_runstate(td, TD_VERIFYING);
236
36167d82
JA
237 io_u = NULL;
238 while (!td->terminate) {
ebac4655
JA
239 io_u = __get_io_u(td);
240 if (!io_u)
241 break;
242
36167d82 243 if (runtime_exceeded(td, &io_u->start_time))
02bcaa8c 244 break;
02bcaa8c 245
36167d82 246 if (get_next_verify(td, io_u))
ebac4655 247 break;
ebac4655 248
36167d82 249 if (td_io_prep(td, io_u))
53cdc686
JA
250 break;
251
36167d82
JA
252requeue:
253 ret = td_io_queue(td, io_u);
53cdc686 254
36167d82
JA
255 switch (ret) {
256 case FIO_Q_COMPLETED:
257 if (io_u->error)
22819ec2 258 ret = -io_u->error;
36167d82
JA
259 if (io_u->xfer_buflen != io_u->resid && io_u->resid) {
260 int bytes = io_u->xfer_buflen - io_u->resid;
ebac4655 261
36167d82
JA
262 io_u->xfer_buflen = io_u->resid;
263 io_u->xfer_buf += bytes;
264 goto requeue;
265 }
99784632
JA
266 ret = io_u_sync_complete(td, io_u, verify_io_u);
267 if (ret)
36167d82 268 break;
36167d82
JA
269 continue;
270 case FIO_Q_QUEUED:
271 break;
755200a3
JA
272 case FIO_Q_BUSY:
273 requeue_io_u(td, &io_u);
274 ret = td_io_commit(td);
275 break;
36167d82
JA
276 default:
277 assert(ret < 0);
22819ec2 278 td_verror(td, -ret);
ebac4655
JA
279 break;
280 }
281
99784632 282 if (ret < 0 || td->error)
3af6ef39
JA
283 break;
284
ebac4655 285 /*
3af6ef39
JA
286 * if we can queue more, do so. but check if there are
287 * completed io_u's first.
ebac4655 288 */
97601024 289 min_events = 0;
755200a3 290 if (queue_full(td) || ret == FIO_Q_BUSY)
3af6ef39 291 min_events = 1;
3af6ef39
JA
292
293 /*
294 * Reap required number of io units, if any, and do the
295 * verification on them through the callback handler
296 */
97601024 297 if (io_u_queued_complete(td, min_events, verify_io_u))
ebac4655 298 break;
36167d82 299 }
ebac4655 300
36167d82
JA
301 if (io_u)
302 put_io_u(td, io_u);
ebac4655
JA
303
304 if (td->cur_depth)
305 cleanup_pending_aio(td);
306
307 td_set_runstate(td, TD_RUNNING);
308}
309
b990b5c0
JA
310/*
311 * Not really an io thread, all it does is burn CPU cycles in the specified
312 * manner.
313 */
314static void do_cpuio(struct thread_data *td)
315{
316 struct timeval e;
317 int split = 100 / td->cpuload;
318 int i = 0;
319
320 while (!td->terminate) {
02bcaa8c 321 fio_gettime(&e, NULL);
b990b5c0
JA
322
323 if (runtime_exceeded(td, &e))
324 break;
325
326 if (!(i % split))
327 __usec_sleep(10000);
328 else
329 usec_sleep(td, 10000);
330
331 i++;
332 }
333}
334
32cd46a0 335/*
906c8d75 336 * Main IO worker function. It retrieves io_u's to process and queues
32cd46a0
JA
337 * and reaps them, checking for rate and errors along the way.
338 */
ebac4655
JA
339static void do_io(struct thread_data *td)
340{
02bcaa8c 341 struct timeval s;
ebac4655 342 unsigned long usec;
84585003 343 int i, ret = 0;
ebac4655 344
5853e5a8
JA
345 td_set_runstate(td, TD_RUNNING);
346
3951414d 347 while ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->io_size) {
97601024
JA
348 struct timeval comp_time;
349 long bytes_done = 0;
84585003 350 int min_evts = 0;
ebac4655
JA
351 struct io_u *io_u;
352
353 if (td->terminate)
354 break;
355
3d7c391d 356 io_u = get_io_u(td);
ebac4655
JA
357 if (!io_u)
358 break;
359
360 memcpy(&s, &io_u->start_time, sizeof(s));
97601024
JA
361
362 if (runtime_exceeded(td, &s)) {
363 put_io_u(td, io_u);
364 break;
365 }
cec6b55d 366requeue:
45bee283 367 ret = td_io_queue(td, io_u);
36167d82
JA
368
369 switch (ret) {
370 case FIO_Q_COMPLETED:
371 if (io_u->error) {
372 ret = io_u->error;
373 break;
374 }
375 if (io_u->xfer_buflen != io_u->resid && io_u->resid) {
376 int bytes = io_u->xfer_buflen - io_u->resid;
377
cec6b55d 378 io_u->xfer_buflen = io_u->resid;
36167d82 379 io_u->xfer_buf += bytes;
cec6b55d 380 goto requeue;
cec6b55d 381 }
97601024
JA
382 fio_gettime(&comp_time, NULL);
383 bytes_done = io_u_sync_complete(td, io_u, NULL);
99784632
JA
384 if (bytes_done < 0)
385 ret = bytes_done;
36167d82
JA
386 break;
387 case FIO_Q_QUEUED:
388 break;
755200a3
JA
389 case FIO_Q_BUSY:
390 requeue_io_u(td, &io_u);
391 ret = td_io_commit(td);
392 break;
36167d82
JA
393 default:
394 assert(ret < 0);
395 put_io_u(td, io_u);
396 break;
ebac4655
JA
397 }
398
99784632 399 if (ret < 0 || td->error)
36167d82
JA
400 break;
401
755200a3
JA
402 if (io_u)
403 add_slat_sample(td, io_u->ddir, mtime_since(&io_u->start_time, &io_u->issue_time));
ebac4655 404
97601024
JA
405 /*
406 * See if we need to complete some commands
407 */
755200a3 408 if (ret == FIO_Q_QUEUED || ret == FIO_Q_BUSY) {
97601024 409 min_evts = 0;
755200a3 410 if (queue_full(td) || ret == FIO_Q_BUSY)
36167d82 411 min_evts = 1;
ebac4655 412
97601024
JA
413 fio_gettime(&comp_time, NULL);
414 bytes_done = io_u_queued_complete(td, min_evts, NULL);
415 if (bytes_done < 0)
36167d82 416 break;
ebac4655
JA
417 }
418
97601024
JA
419 if (!bytes_done)
420 continue;
421
ebac4655
JA
422 /*
423 * the rate is batched for now, it should work for batches
424 * of completions except the very first one which may look
425 * a little bursty
426 */
97601024 427 usec = utime_since(&s, &comp_time);
ebac4655 428
97601024 429 rate_throttle(td, usec, bytes_done, td->ddir);
ebac4655 430
97601024 431 if (check_min_rate(td, &comp_time)) {
98aa62d8 432 if (exitall_on_terminate)
6ce15a32 433 terminate_threads(td->groupid, 0);
fd841467 434 td_verror(td, ENODATA);
ebac4655
JA
435 break;
436 }
437
9c1f7434
JA
438 if (td->thinktime) {
439 unsigned long long b;
440
441 b = td->io_blocks[0] + td->io_blocks[1];
48097d5c
JA
442 if (!(b % td->thinktime_blocks)) {
443 int left;
444
445 if (td->thinktime_spin)
446 __usec_sleep(td->thinktime_spin);
447
448 left = td->thinktime - td->thinktime_spin;
449 if (left)
450 usec_sleep(td, left);
451 }
9c1f7434 452 }
ebac4655
JA
453 }
454
4d2413c6 455 if (!td->error) {
3d7c391d
JA
456 struct fio_file *f;
457
84585003
JA
458 if (td->cur_depth)
459 cleanup_pending_aio(td);
ebac4655 460
84585003
JA
461 if (should_fsync(td) && td->end_fsync) {
462 td_set_runstate(td, TD_FSYNCING);
463 for_each_file(td, f, i)
858a3d47 464 fio_io_sync(td, f);
84585003 465 }
5853e5a8 466 }
ebac4655
JA
467}
468
ebac4655
JA
469static void cleanup_io_u(struct thread_data *td)
470{
471 struct list_head *entry, *n;
472 struct io_u *io_u;
473
474 list_for_each_safe(entry, n, &td->io_u_freelist) {
475 io_u = list_entry(entry, struct io_u, list);
476
477 list_del(&io_u->list);
478 free(io_u);
479 }
480
2f9ade3c 481 free_io_mem(td);
ebac4655
JA
482}
483
6b9cea23
JA
484/*
485 * "randomly" fill the buffer contents
486 */
66eeb296 487static void fill_rand_buf(struct io_u *io_u, int max_bs)
6b9cea23 488{
66eeb296 489 int *ptr = io_u->buf;
6b9cea23
JA
490
491 while ((void *) ptr - io_u->buf < max_bs) {
492 *ptr = rand() * 0x9e370001;
493 ptr++;
494 }
495}
496
ebac4655
JA
497static int init_io_u(struct thread_data *td)
498{
499 struct io_u *io_u;
a00735e6 500 unsigned int max_bs;
ebac4655
JA
501 int i, max_units;
502 char *p;
503
2866c82d 504 if (td->io_ops->flags & FIO_CPUIO)
b990b5c0
JA
505 return 0;
506
2866c82d 507 if (td->io_ops->flags & FIO_SYNCIO)
ebac4655
JA
508 max_units = 1;
509 else
510 max_units = td->iodepth;
511
a00735e6 512 max_bs = max(td->max_bs[DDIR_READ], td->max_bs[DDIR_WRITE]);
74b025b0
JA
513 td->orig_buffer_size = max_bs * max_units;
514
d0bdaf49 515 if (td->mem_type == MEM_SHMHUGE || td->mem_type == MEM_MMAPHUGE)
56bb17f2 516 td->orig_buffer_size = (td->orig_buffer_size + td->hugepage_size - 1) & ~(td->hugepage_size - 1);
74b025b0 517 else
29d610e1 518 td->orig_buffer_size += page_mask;
ebac4655 519
2f9ade3c
JA
520 if (allocate_io_mem(td))
521 return 1;
ebac4655 522
ebac4655
JA
523 p = ALIGN(td->orig_buffer);
524 for (i = 0; i < max_units; i++) {
525 io_u = malloc(sizeof(*io_u));
526 memset(io_u, 0, sizeof(*io_u));
527 INIT_LIST_HEAD(&io_u->list);
528
a00735e6 529 io_u->buf = p + max_bs * i;
6b9cea23 530 if (td_write(td) || td_rw(td))
a00735e6 531 fill_rand_buf(io_u, max_bs);
6b9cea23 532
b1ff3403 533 io_u->index = i;
ebac4655
JA
534 list_add(&io_u->list, &td->io_u_freelist);
535 }
536
537 return 0;
538}
539
da86774e
JA
540static int switch_ioscheduler(struct thread_data *td)
541{
542 char tmp[256], tmp2[128];
543 FILE *f;
544 int ret;
545
f48b467c
JA
546 if (td->io_ops->flags & FIO_CPUIO)
547 return 0;
548
da86774e
JA
549 sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
550
551 f = fopen(tmp, "r+");
552 if (!f) {
553 td_verror(td, errno);
554 return 1;
555 }
556
557 /*
558 * Set io scheduler.
559 */
560 ret = fwrite(td->ioscheduler, strlen(td->ioscheduler), 1, f);
561 if (ferror(f) || ret != 1) {
562 td_verror(td, errno);
563 fclose(f);
564 return 1;
565 }
566
567 rewind(f);
568
569 /*
570 * Read back and check that the selected scheduler is now the default.
571 */
572 ret = fread(tmp, 1, sizeof(tmp), f);
573 if (ferror(f) || ret < 0) {
574 td_verror(td, errno);
575 fclose(f);
576 return 1;
577 }
578
579 sprintf(tmp2, "[%s]", td->ioscheduler);
580 if (!strstr(tmp, tmp2)) {
3b70d7e5 581 log_err("fio: io scheduler %s not found\n", td->ioscheduler);
da86774e
JA
582 td_verror(td, EINVAL);
583 fclose(f);
584 return 1;
585 }
586
587 fclose(f);
588 return 0;
589}
590
ebac4655
JA
591static void clear_io_state(struct thread_data *td)
592{
53cdc686
JA
593 struct fio_file *f;
594 int i;
ebac4655 595
ebac4655
JA
596 td->stat_io_bytes[0] = td->stat_io_bytes[1] = 0;
597 td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
20dc95c4 598 td->zone_bytes = 0;
ebac4655 599
53cdc686
JA
600 for_each_file(td, f, i) {
601 f->last_pos = 0;
602 if (td->io_ops->flags & FIO_SYNCIO)
603 lseek(f->fd, SEEK_SET, 0);
604
605 if (f->file_map)
606 memset(f->file_map, 0, f->num_maps * sizeof(long));
607 }
ebac4655
JA
608}
609
906c8d75
JA
610/*
611 * Entry point for the thread based jobs. The process based jobs end up
612 * here as well, after a little setup.
613 */
ebac4655
JA
614static void *thread_main(void *data)
615{
69008999 616 unsigned long long runtime[2];
ebac4655 617 struct thread_data *td = data;
ebac4655
JA
618
619 if (!td->use_thread)
620 setsid();
621
622 td->pid = getpid();
623
aea47d44
JA
624 INIT_LIST_HEAD(&td->io_u_freelist);
625 INIT_LIST_HEAD(&td->io_u_busylist);
755200a3 626 INIT_LIST_HEAD(&td->io_u_requeues);
aea47d44
JA
627 INIT_LIST_HEAD(&td->io_hist_list);
628 INIT_LIST_HEAD(&td->io_log_list);
629
ebac4655
JA
630 if (init_io_u(td))
631 goto err;
632
633 if (fio_setaffinity(td) == -1) {
634 td_verror(td, errno);
635 goto err;
636 }
637
aea47d44
JA
638 if (init_iolog(td))
639 goto err;
640
ebac4655
JA
641 if (td->ioprio) {
642 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
643 td_verror(td, errno);
644 goto err;
645 }
646 }
647
1056eaad 648 if (nice(td->nice) == -1) {
b6f4d880
JA
649 td_verror(td, errno);
650 goto err;
651 }
652
75154845
JA
653 if (init_random_state(td))
654 goto err;
655
56f9498d
JA
656 if (td->ioscheduler && switch_ioscheduler(td))
657 goto err;
da86774e 658
75154845 659 td_set_runstate(td, TD_INITIALIZED);
bbfd6b00
JA
660 fio_sem_up(&startup_sem);
661 fio_sem_down(&td->mutex);
ebac4655 662
53cdc686 663 if (!td->create_serialize && setup_files(td))
ebac4655 664 goto err;
21972cde
JA
665 if (open_files(td))
666 goto err;
ebac4655 667
7d6c5283
JA
668 /*
669 * Do this late, as some IO engines would like to have the
670 * files setup prior to initializing structures.
671 */
672 if (td_io_init(td))
673 goto err;
674
69cfd7e0
JA
675 if (td->exec_prerun) {
676 if (system(td->exec_prerun) < 0)
677 goto err;
678 }
4e0ba8af 679
69008999 680 fio_gettime(&td->epoch, NULL);
36dff966 681 getrusage(RUSAGE_SELF, &td->ru_start);
69008999
JA
682
683 runtime[0] = runtime[1] = 0;
ebac4655 684 while (td->loops--) {
02bcaa8c 685 fio_gettime(&td->start, NULL);
ebac4655
JA
686 memcpy(&td->stat_sample_time, &td->start, sizeof(td->start));
687
688 if (td->ratemin)
689 memcpy(&td->lastrate, &td->stat_sample_time, sizeof(td->lastrate));
690
691 clear_io_state(td);
692 prune_io_piece_log(td);
693
2866c82d 694 if (td->io_ops->flags & FIO_CPUIO)
b990b5c0
JA
695 do_cpuio(td);
696 else
697 do_io(td);
ebac4655 698
69008999 699 runtime[td->ddir] += utime_since_now(&td->start);
aea47d44 700 if (td_rw(td) && td->io_bytes[td->ddir ^ 1])
69008999 701 runtime[td->ddir ^ 1] = runtime[td->ddir];
3d60d1ed 702
ebac4655
JA
703 if (td->error || td->terminate)
704 break;
705
706 if (td->verify == VERIFY_NONE)
707 continue;
708
709 clear_io_state(td);
02bcaa8c 710 fio_gettime(&td->start, NULL);
ebac4655
JA
711
712 do_verify(td);
713
69008999 714 runtime[DDIR_READ] += utime_since_now(&td->start);
ebac4655
JA
715
716 if (td->error || td->terminate)
717 break;
718 }
719
36dff966 720 update_rusage_stat(td);
69008999
JA
721 fio_gettime(&td->end_time, NULL);
722 td->runtime[0] = runtime[0] / 1000;
723 td->runtime[1] = runtime[1] / 1000;
724
ebac4655
JA
725 if (td->bw_log)
726 finish_log(td, td->bw_log, "bw");
727 if (td->slat_log)
728 finish_log(td, td->slat_log, "slat");
729 if (td->clat_log)
730 finish_log(td, td->clat_log, "clat");
076efc7c 731 if (td->write_iolog_file)
843a7413 732 write_iolog_close(td);
69cfd7e0
JA
733 if (td->exec_postrun) {
734 if (system(td->exec_postrun) < 0)
735 log_err("fio: postrun %s failed\n", td->exec_postrun);
736 }
ebac4655
JA
737
738 if (exitall_on_terminate)
6ce15a32 739 terminate_threads(td->groupid, 0);
ebac4655
JA
740
741err:
5bf13a5a
JA
742 if (td->error)
743 printf("fio: pid=%d, err=%d/%s\n", td->pid, td->error, td->verror);
53cdc686 744 close_files(td);
2866c82d 745 close_ioengine(td);
ebac4655 746 cleanup_io_u(td);
ebac4655 747 td_set_runstate(td, TD_EXITED);
a6418147 748 return (void *) td->error;
ebac4655
JA
749}
750
906c8d75
JA
751/*
752 * We cannot pass the td data into a forked process, so attach the td and
753 * pass it to the thread worker.
754 */
a6418147 755static int fork_main(int shmid, int offset)
ebac4655
JA
756{
757 struct thread_data *td;
a6418147 758 void *data, *ret;
ebac4655
JA
759
760 data = shmat(shmid, NULL, 0);
761 if (data == (void *) -1) {
a6418147
JA
762 int __err = errno;
763
ebac4655 764 perror("shmat");
a6418147 765 return __err;
ebac4655
JA
766 }
767
768 td = data + offset * sizeof(struct thread_data);
a6418147 769 ret = thread_main(td);
ebac4655 770 shmdt(data);
a6418147 771 return (int) ret;
ebac4655
JA
772}
773
906c8d75
JA
774/*
775 * Run over the job map and reap the threads that have exited, if any.
776 */
ebac4655
JA
777static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
778{
34572e28 779 struct thread_data *td;
fab6aa71 780 int i, cputhreads, pending, status, ret;
ebac4655
JA
781
782 /*
783 * reap exited threads (TD_EXITED -> TD_REAPED)
784 */
4d2413c6 785 pending = cputhreads = 0;
34572e28 786 for_each_td(td, i) {
84585003
JA
787 /*
788 * ->io_ops is NULL for a thread that has closed its
789 * io engine
790 */
791 if (td->io_ops && td->io_ops->flags & FIO_CPUIO)
b990b5c0
JA
792 cputhreads++;
793
fab6aa71
JA
794 if (td->runstate < TD_EXITED) {
795 /*
796 * check if someone quit or got killed in an unusual way
797 */
798 ret = waitpid(td->pid, &status, WNOHANG);
799 if (ret < 0)
800 perror("waitpid");
801 else if ((ret == td->pid) && WIFSIGNALED(status)) {
802 int sig = WTERMSIG(status);
803
804 log_err("fio: pid=%d, got signal=%d\n", td->pid, sig);
805 td_set_runstate(td, TD_REAPED);
806 goto reaped;
807 }
808 }
809
4d2413c6
JA
810 if (td->runstate != TD_EXITED) {
811 if (td->runstate < TD_RUNNING)
812 pending++;
813
ebac4655 814 continue;
4d2413c6 815 }
ebac4655 816
437c9b71
JA
817 if (td->error)
818 exit_value++;
819
ebac4655
JA
820 td_set_runstate(td, TD_REAPED);
821
822 if (td->use_thread) {
823 long ret;
824
825 if (pthread_join(td->thread, (void *) &ret))
826 perror("thread_join");
a6418147
JA
827 } else {
828 int status;
829
fab6aa71
JA
830 ret = waitpid(td->pid, &status, 0);
831 if (ret < 0)
832 perror("waitpid");
73170f19 833 else if (WIFEXITED(status) && WEXITSTATUS(status)) {
a6418147
JA
834 if (!exit_value)
835 exit_value++;
836 }
837 }
ebac4655 838
fab6aa71 839reaped:
ebac4655
JA
840 (*nr_running)--;
841 (*m_rate) -= td->ratemin;
842 (*t_rate) -= td->rate;
843 }
b990b5c0 844
4d2413c6 845 if (*nr_running == cputhreads && !pending)
6ce15a32 846 terminate_threads(TERMINATE_ALL, 0);
ebac4655
JA
847}
848
906c8d75
JA
849/*
850 * Main function for kicking off and reaping jobs, as needed.
851 */
ebac4655
JA
852static void run_threads(void)
853{
ebac4655
JA
854 struct thread_data *td;
855 unsigned long spent;
856 int i, todo, nr_running, m_rate, t_rate, nr_started;
fcb6ade2 857
2f9ade3c
JA
858 if (fio_pin_memory())
859 return;
ebac4655 860
c6ae0a5b
JA
861 if (!terse_output) {
862 printf("Starting %d thread%s\n", thread_number, thread_number > 1 ? "s" : "");
863 fflush(stdout);
864 }
c04f7ec3 865
4efa970e
JA
866 signal(SIGINT, sig_handler);
867 signal(SIGALRM, sig_handler);
868
ebac4655
JA
869 todo = thread_number;
870 nr_running = 0;
871 nr_started = 0;
872 m_rate = t_rate = 0;
873
34572e28 874 for_each_td(td, i) {
263e529f 875 print_status_init(td->thread_number - 1);
ebac4655 876
380cf265
JA
877 if (!td->create_serialize) {
878 init_disk_util(td);
ebac4655 879 continue;
380cf265 880 }
ebac4655
JA
881
882 /*
883 * do file setup here so it happens sequentially,
884 * we don't want X number of threads getting their
885 * client data interspersed on disk
886 */
53cdc686 887 if (setup_files(td)) {
5bf13a5a
JA
888 exit_value++;
889 if (td->error)
890 log_err("fio: pid=%d, err=%d/%s\n", td->pid, td->error, td->verror);
ebac4655
JA
891 td_set_runstate(td, TD_REAPED);
892 todo--;
893 }
380cf265
JA
894
895 init_disk_util(td);
ebac4655
JA
896 }
897
ebac4655 898 while (todo) {
75154845
JA
899 struct thread_data *map[MAX_JOBS];
900 struct timeval this_start;
901 int this_jobs = 0, left;
902
ebac4655
JA
903 /*
904 * create threads (TD_NOT_CREATED -> TD_CREATED)
905 */
34572e28 906 for_each_td(td, i) {
ebac4655
JA
907 if (td->runstate != TD_NOT_CREATED)
908 continue;
909
910 /*
911 * never got a chance to start, killed by other
912 * thread for some reason
913 */
914 if (td->terminate) {
915 todo--;
916 continue;
917 }
918
919 if (td->start_delay) {
263e529f 920 spent = mtime_since_genesis();
ebac4655
JA
921
922 if (td->start_delay * 1000 > spent)
923 continue;
924 }
925
926 if (td->stonewall && (nr_started || nr_running))
927 break;
928
75154845
JA
929 /*
930 * Set state to created. Thread will transition
931 * to TD_INITIALIZED when it's done setting up.
932 */
ebac4655 933 td_set_runstate(td, TD_CREATED);
75154845 934 map[this_jobs++] = td;
bbfd6b00 935 fio_sem_init(&startup_sem, 1);
ebac4655
JA
936 nr_started++;
937
938 if (td->use_thread) {
939 if (pthread_create(&td->thread, NULL, thread_main, td)) {
940 perror("thread_create");
941 nr_started--;
942 }
943 } else {
944 if (fork())
bbfd6b00 945 fio_sem_down(&startup_sem);
ebac4655 946 else {
a6418147
JA
947 int ret = fork_main(shm_id, i);
948
949 exit(ret);
ebac4655
JA
950 }
951 }
952 }
953
954 /*
75154845
JA
955 * Wait for the started threads to transition to
956 * TD_INITIALIZED.
ebac4655 957 */
02bcaa8c 958 fio_gettime(&this_start, NULL);
75154845 959 left = this_jobs;
6ce15a32 960 while (left && !fio_abort) {
75154845
JA
961 if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
962 break;
963
964 usleep(100000);
965
966 for (i = 0; i < this_jobs; i++) {
967 td = map[i];
968 if (!td)
969 continue;
b6f4d880 970 if (td->runstate == TD_INITIALIZED) {
75154845
JA
971 map[i] = NULL;
972 left--;
b6f4d880
JA
973 } else if (td->runstate >= TD_EXITED) {
974 map[i] = NULL;
975 left--;
976 todo--;
977 nr_running++; /* work-around... */
75154845
JA
978 }
979 }
980 }
981
982 if (left) {
3b70d7e5 983 log_err("fio: %d jobs failed to start\n", left);
75154845
JA
984 for (i = 0; i < this_jobs; i++) {
985 td = map[i];
986 if (!td)
987 continue;
988 kill(td->pid, SIGTERM);
989 }
990 break;
991 }
992
993 /*
b6f4d880 994 * start created threads (TD_INITIALIZED -> TD_RUNNING).
75154845 995 */
34572e28 996 for_each_td(td, i) {
75154845 997 if (td->runstate != TD_INITIALIZED)
ebac4655
JA
998 continue;
999
1000 td_set_runstate(td, TD_RUNNING);
1001 nr_running++;
1002 nr_started--;
1003 m_rate += td->ratemin;
1004 t_rate += td->rate;
75154845 1005 todo--;
bbfd6b00 1006 fio_sem_up(&td->mutex);
ebac4655
JA
1007 }
1008
1009 reap_threads(&nr_running, &t_rate, &m_rate);
1010
1011 if (todo)
1012 usleep(100000);
1013 }
1014
1015 while (nr_running) {
1016 reap_threads(&nr_running, &t_rate, &m_rate);
1017 usleep(10000);
1018 }
1019
1020 update_io_ticks();
2f9ade3c 1021 fio_unpin_memory();
ebac4655
JA
1022}
1023
ebac4655
JA
1024int main(int argc, char *argv[])
1025{
29d610e1
JA
1026 long ps;
1027
dbe1125e
JA
1028 /*
1029 * We need locale for number printing, if it isn't set then just
1030 * go with the US format.
1031 */
1032 if (!getenv("LC_NUMERIC"))
1033 setlocale(LC_NUMERIC, "en_US");
1034
ebac4655
JA
1035 if (parse_options(argc, argv))
1036 return 1;
1037
1038 if (!thread_number) {
3b70d7e5 1039 log_err("Nothing to do\n");
ebac4655
JA
1040 return 1;
1041 }
1042
29d610e1
JA
1043 ps = sysconf(_SC_PAGESIZE);
1044 if (ps < 0) {
1045 log_err("Failed to get page size\n");
1046 return 1;
1047 }
1048
1049 page_mask = ps - 1;
1050
bb3884d8
JA
1051 if (write_bw_log) {
1052 setup_log(&agg_io_log[DDIR_READ]);
1053 setup_log(&agg_io_log[DDIR_WRITE]);
1054 }
1055
ebac4655
JA
1056 disk_util_timer_arm();
1057
1058 run_threads();
6ce15a32 1059
bb3884d8 1060 if (!fio_abort) {
6ce15a32 1061 show_run_stats();
bb3884d8
JA
1062 if (write_bw_log) {
1063 __finish_log(agg_io_log[DDIR_READ],"agg-read_bw.log");
1064 __finish_log(agg_io_log[DDIR_WRITE],"agg-write_bw.log");
1065 }
1066 }
ebac4655 1067
437c9b71 1068 return exit_value;
ebac4655 1069}