[PATCH] Fix random seed for numjobs > 1
[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
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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>
ebac4655
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30#include <sys/stat.h>
31#include <sys/wait.h>
32#include <sys/ipc.h>
33#include <sys/shm.h>
ebac4655
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34#include <sys/mman.h>
35
36#include "fio.h"
37#include "os.h"
38
29d610e1
JA
39static unsigned long page_mask;
40#define ALIGN(buf) \
41 (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
ebac4655
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42
43int groupid = 0;
44int thread_number = 0;
ebac4655 45int shm_id = 0;
53cdc686 46int temp_stall_ts;
ebac4655 47
bbfd6b00 48static volatile int startup_sem;
6ce15a32 49static volatile int fio_abort;
437c9b71 50static int exit_value;
ebac4655 51
bb3884d8
JA
52struct io_log *agg_io_log[2];
53
ebac4655 54#define TERMINATE_ALL (-1)
75154845 55#define JOB_START_TIMEOUT (5 * 1000)
ebac4655 56
6ce15a32
JA
57static inline void td_set_runstate(struct thread_data *td, int runstate)
58{
59 td->runstate = runstate;
60}
61
62static void terminate_threads(int group_id, int forced_kill)
ebac4655 63{
34572e28 64 struct thread_data *td;
ebac4655
JA
65 int i;
66
34572e28 67 for_each_td(td, i) {
ebac4655
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68 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
69 td->terminate = 1;
70 td->start_delay = 0;
6ce15a32
JA
71 if (forced_kill)
72 td_set_runstate(td, TD_EXITED);
ebac4655
JA
73 }
74 }
75}
76
77static void sig_handler(int sig)
78{
79 switch (sig) {
80 case SIGALRM:
81 update_io_ticks();
82 disk_util_timer_arm();
83 print_thread_status();
84 break;
85 default:
6ce15a32 86 printf("\nfio: terminating on signal %d\n", sig);
ebac4655 87 fflush(stdout);
6ce15a32 88 terminate_threads(TERMINATE_ALL, 0);
ebac4655
JA
89 break;
90 }
91}
92
906c8d75
JA
93/*
94 * Check if we are above the minimum rate given.
95 */
ebac4655
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96static int check_min_rate(struct thread_data *td, struct timeval *now)
97{
98 unsigned long spent;
99 unsigned long rate;
100 int ddir = td->ddir;
101
102 /*
103 * allow a 2 second settle period in the beginning
104 */
105 if (mtime_since(&td->start, now) < 2000)
106 return 0;
107
108 /*
109 * if rate blocks is set, sample is running
110 */
111 if (td->rate_bytes) {
112 spent = mtime_since(&td->lastrate, now);
113 if (spent < td->ratecycle)
114 return 0;
115
116 rate = (td->this_io_bytes[ddir] - td->rate_bytes) / spent;
117 if (rate < td->ratemin) {
1e97cce9 118 fprintf(f_out, "%s: min rate %u not met, got %luKiB/sec\n", td->name, td->ratemin, rate);
ebac4655
JA
119 return 1;
120 }
121 }
122
123 td->rate_bytes = td->this_io_bytes[ddir];
124 memcpy(&td->lastrate, now, sizeof(*now));
125 return 0;
126}
127
128static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
129{
130 if (!td->timeout)
131 return 0;
132 if (mtime_since(&td->epoch, t) >= td->timeout * 1000)
133 return 1;
134
135 return 0;
136}
137
53cdc686
JA
138static struct fio_file *get_next_file(struct thread_data *td)
139{
0ab8db89 140 unsigned int old_next_file = td->next_file;
b2a15192
JA
141 struct fio_file *f;
142
143 do {
144 f = &td->files[td->next_file];
145
146 td->next_file++;
147 if (td->next_file >= td->nr_files)
148 td->next_file = 0;
149
150 if (f->fd != -1)
151 break;
53cdc686 152
b2a15192
JA
153 f = NULL;
154 } while (td->next_file != old_next_file);
53cdc686
JA
155
156 return f;
157}
158
906c8d75
JA
159/*
160 * When job exits, we can cancel the in-flight IO if we are using async
161 * io. Attempt to do so.
162 */
ebac4655
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163static void cleanup_pending_aio(struct thread_data *td)
164{
165 struct timespec ts = { .tv_sec = 0, .tv_nsec = 0};
166 struct list_head *entry, *n;
167 struct io_completion_data icd;
168 struct io_u *io_u;
169 int r;
170
171 /*
172 * get immediately available events, if any
173 */
45bee283 174 r = td_io_getevents(td, 0, td->cur_depth, &ts);
ebac4655
JA
175 if (r > 0) {
176 icd.nr = r;
177 ios_completed(td, &icd);
178 }
179
180 /*
181 * now cancel remaining active events
182 */
2866c82d 183 if (td->io_ops->cancel) {
ebac4655
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184 list_for_each_safe(entry, n, &td->io_u_busylist) {
185 io_u = list_entry(entry, struct io_u, list);
186
2866c82d 187 r = td->io_ops->cancel(td, io_u);
ebac4655
JA
188 if (!r)
189 put_io_u(td, io_u);
190 }
191 }
192
193 if (td->cur_depth) {
45bee283 194 r = td_io_getevents(td, td->cur_depth, td->cur_depth, NULL);
ebac4655
JA
195 if (r > 0) {
196 icd.nr = r;
197 ios_completed(td, &icd);
198 }
199 }
200}
201
858a3d47
JA
202/*
203 * Helper to handle the final sync of a file. Works just like the normal
204 * io path, just does everything sync.
205 */
206static int fio_io_sync(struct thread_data *td, struct fio_file *f)
207{
208 struct io_u *io_u = __get_io_u(td);
209 struct io_completion_data icd;
210 int ret;
211
212 if (!io_u)
213 return 1;
214
215 io_u->ddir = DDIR_SYNC;
216 io_u->file = f;
217
218 if (td_io_prep(td, io_u)) {
219 put_io_u(td, io_u);
220 return 1;
221 }
222
223 ret = td_io_queue(td, io_u);
224 if (ret) {
353a7e0e 225 td_verror(td, io_u->error);
858a3d47 226 put_io_u(td, io_u);
858a3d47
JA
227 return 1;
228 }
229
230 ret = td_io_getevents(td, 1, td->cur_depth, NULL);
231 if (ret < 0) {
353a7e0e 232 td_verror(td, ret);
858a3d47
JA
233 return 1;
234 }
235
236 icd.nr = ret;
237 ios_completed(td, &icd);
238 if (icd.error) {
239 td_verror(td, icd.error);
240 return 1;
241 }
242
243 return 0;
244}
245
906c8d75
JA
246/*
247 * The main verify engine. Runs over the writes we previusly submitted,
248 * reads the blocks back in, and checks the crc/md5 of the data.
249 */
1e97cce9 250static void do_verify(struct thread_data *td)
ebac4655 251{
ebac4655
JA
252 struct io_u *io_u, *v_io_u = NULL;
253 struct io_completion_data icd;
53cdc686 254 struct fio_file *f;
e5b401d4
JA
255 int ret, i;
256
257 /*
258 * sync io first and invalidate cache, to make sure we really
259 * read from disk.
260 */
261 for_each_file(td, f, i) {
858a3d47 262 fio_io_sync(td, f);
e5b401d4
JA
263 file_invalidate_cache(td, f);
264 }
ebac4655
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265
266 td_set_runstate(td, TD_VERIFYING);
267
268 do {
269 if (td->terminate)
270 break;
271
ebac4655
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272 io_u = __get_io_u(td);
273 if (!io_u)
274 break;
275
02bcaa8c
JA
276 if (runtime_exceeded(td, &io_u->start_time)) {
277 put_io_u(td, io_u);
278 break;
279 }
280
aea47d44 281 if (get_next_verify(td, io_u)) {
ebac4655
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282 put_io_u(td, io_u);
283 break;
284 }
285
53cdc686
JA
286 f = get_next_file(td);
287 if (!f)
288 break;
289
290 io_u->file = f;
291
aea47d44 292 if (td_io_prep(td, io_u)) {
ebac4655
JA
293 put_io_u(td, io_u);
294 break;
295 }
296
45bee283 297 ret = td_io_queue(td, io_u);
ebac4655 298 if (ret) {
353a7e0e 299 td_verror(td, io_u->error);
ebac4655 300 put_io_u(td, io_u);
ebac4655
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301 break;
302 }
303
304 /*
305 * we have one pending to verify, do that while
306 * we are doing io on the next one
307 */
308 if (do_io_u_verify(td, &v_io_u))
309 break;
310
45bee283 311 ret = td_io_getevents(td, 1, 1, NULL);
ebac4655
JA
312 if (ret != 1) {
313 if (ret < 0)
314 td_verror(td, ret);
315 break;
316 }
317
2866c82d 318 v_io_u = td->io_ops->event(td, 0);
ebac4655
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319 icd.nr = 1;
320 icd.error = 0;
02bcaa8c 321 fio_gettime(&icd.time, NULL);
ebac4655
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322 io_completed(td, v_io_u, &icd);
323
324 if (icd.error) {
325 td_verror(td, icd.error);
326 put_io_u(td, v_io_u);
327 v_io_u = NULL;
328 break;
329 }
330
ebac4655
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331 /*
332 * if we can't submit more io, we need to verify now
333 */
334 if (queue_full(td) && do_io_u_verify(td, &v_io_u))
335 break;
336
337 } while (1);
338
339 do_io_u_verify(td, &v_io_u);
340
341 if (td->cur_depth)
342 cleanup_pending_aio(td);
343
344 td_set_runstate(td, TD_RUNNING);
345}
346
b990b5c0
JA
347/*
348 * Not really an io thread, all it does is burn CPU cycles in the specified
349 * manner.
350 */
351static void do_cpuio(struct thread_data *td)
352{
353 struct timeval e;
354 int split = 100 / td->cpuload;
355 int i = 0;
356
357 while (!td->terminate) {
02bcaa8c 358 fio_gettime(&e, NULL);
b990b5c0
JA
359
360 if (runtime_exceeded(td, &e))
361 break;
362
363 if (!(i % split))
364 __usec_sleep(10000);
365 else
366 usec_sleep(td, 10000);
367
368 i++;
369 }
370}
371
32cd46a0 372/*
906c8d75 373 * Main IO worker function. It retrieves io_u's to process and queues
32cd46a0
JA
374 * and reaps them, checking for rate and errors along the way.
375 */
ebac4655
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376static void do_io(struct thread_data *td)
377{
378 struct io_completion_data icd;
02bcaa8c 379 struct timeval s;
ebac4655 380 unsigned long usec;
53cdc686 381 struct fio_file *f;
84585003 382 int i, ret = 0;
ebac4655 383
5853e5a8
JA
384 td_set_runstate(td, TD_RUNNING);
385
3951414d 386 while ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->io_size) {
ebac4655 387 struct timespec *timeout;
84585003 388 int min_evts = 0;
ebac4655
JA
389 struct io_u *io_u;
390
391 if (td->terminate)
392 break;
393
53cdc686
JA
394 f = get_next_file(td);
395 if (!f)
396 break;
397
398 io_u = get_io_u(td, f);
ebac4655
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399 if (!io_u)
400 break;
401
402 memcpy(&s, &io_u->start_time, sizeof(s));
cec6b55d 403requeue:
45bee283 404 ret = td_io_queue(td, io_u);
ebac4655 405 if (ret) {
cec6b55d
JA
406 if (ret > 0 && (io_u->xfer_buflen != io_u->resid) &&
407 io_u->resid) {
408 /*
409 * short read/write. requeue.
410 */
411 io_u->xfer_buflen = io_u->resid;
412 io_u->xfer_buf += ret;
413 goto requeue;
414 } else {
cec6b55d
JA
415 put_io_u(td, io_u);
416 break;
417 }
ebac4655
JA
418 }
419
420 add_slat_sample(td, io_u->ddir, mtime_since(&io_u->start_time, &io_u->issue_time));
421
422 if (td->cur_depth < td->iodepth) {
8d7ad8d9
JA
423 struct timespec ts = { .tv_sec = 0, .tv_nsec = 0};
424
ebac4655
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425 timeout = &ts;
426 min_evts = 0;
427 } else {
428 timeout = NULL;
429 min_evts = 1;
430 }
431
45bee283 432 ret = td_io_getevents(td, min_evts, td->cur_depth, timeout);
ebac4655 433 if (ret < 0) {
87dc1ab1 434 td_verror(td, ret);
ebac4655
JA
435 break;
436 } else if (!ret)
437 continue;
438
439 icd.nr = ret;
440 ios_completed(td, &icd);
441 if (icd.error) {
442 td_verror(td, icd.error);
443 break;
444 }
445
446 /*
447 * the rate is batched for now, it should work for batches
448 * of completions except the very first one which may look
449 * a little bursty
450 */
02bcaa8c 451 usec = utime_since(&s, &icd.time);
ebac4655 452
a00735e6 453 rate_throttle(td, usec, icd.bytes_done[td->ddir], td->ddir);
ebac4655 454
02bcaa8c 455 if (check_min_rate(td, &icd.time)) {
98aa62d8 456 if (exitall_on_terminate)
6ce15a32 457 terminate_threads(td->groupid, 0);
fd841467 458 td_verror(td, ENODATA);
ebac4655
JA
459 break;
460 }
461
02bcaa8c 462 if (runtime_exceeded(td, &icd.time))
ebac4655
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463 break;
464
9c1f7434
JA
465 if (td->thinktime) {
466 unsigned long long b;
467
468 b = td->io_blocks[0] + td->io_blocks[1];
25309a33 469 if (!(b % td->thinktime_blocks))
9c1f7434
JA
470 usec_sleep(td, td->thinktime);
471 }
ebac4655
JA
472 }
473
4d2413c6 474 if (!td->error) {
84585003
JA
475 if (td->cur_depth)
476 cleanup_pending_aio(td);
ebac4655 477
84585003
JA
478 if (should_fsync(td) && td->end_fsync) {
479 td_set_runstate(td, TD_FSYNCING);
480 for_each_file(td, f, i)
858a3d47 481 fio_io_sync(td, f);
84585003 482 }
5853e5a8 483 }
ebac4655
JA
484}
485
ebac4655
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486static void cleanup_io_u(struct thread_data *td)
487{
488 struct list_head *entry, *n;
489 struct io_u *io_u;
490
491 list_for_each_safe(entry, n, &td->io_u_freelist) {
492 io_u = list_entry(entry, struct io_u, list);
493
494 list_del(&io_u->list);
495 free(io_u);
496 }
497
2f9ade3c 498 free_io_mem(td);
ebac4655
JA
499}
500
6b9cea23
JA
501/*
502 * "randomly" fill the buffer contents
503 */
66eeb296 504static void fill_rand_buf(struct io_u *io_u, int max_bs)
6b9cea23 505{
66eeb296 506 int *ptr = io_u->buf;
6b9cea23
JA
507
508 while ((void *) ptr - io_u->buf < max_bs) {
509 *ptr = rand() * 0x9e370001;
510 ptr++;
511 }
512}
513
ebac4655
JA
514static int init_io_u(struct thread_data *td)
515{
516 struct io_u *io_u;
a00735e6 517 unsigned int max_bs;
ebac4655
JA
518 int i, max_units;
519 char *p;
520
2866c82d 521 if (td->io_ops->flags & FIO_CPUIO)
b990b5c0
JA
522 return 0;
523
2866c82d 524 if (td->io_ops->flags & FIO_SYNCIO)
ebac4655
JA
525 max_units = 1;
526 else
527 max_units = td->iodepth;
528
a00735e6 529 max_bs = max(td->max_bs[DDIR_READ], td->max_bs[DDIR_WRITE]);
74b025b0
JA
530 td->orig_buffer_size = max_bs * max_units;
531
d0bdaf49 532 if (td->mem_type == MEM_SHMHUGE || td->mem_type == MEM_MMAPHUGE)
56bb17f2 533 td->orig_buffer_size = (td->orig_buffer_size + td->hugepage_size - 1) & ~(td->hugepage_size - 1);
74b025b0 534 else
29d610e1 535 td->orig_buffer_size += page_mask;
ebac4655 536
2f9ade3c
JA
537 if (allocate_io_mem(td))
538 return 1;
ebac4655 539
ebac4655
JA
540 p = ALIGN(td->orig_buffer);
541 for (i = 0; i < max_units; i++) {
542 io_u = malloc(sizeof(*io_u));
543 memset(io_u, 0, sizeof(*io_u));
544 INIT_LIST_HEAD(&io_u->list);
545
a00735e6 546 io_u->buf = p + max_bs * i;
6b9cea23 547 if (td_write(td) || td_rw(td))
a00735e6 548 fill_rand_buf(io_u, max_bs);
6b9cea23 549
b1ff3403 550 io_u->index = i;
ebac4655
JA
551 list_add(&io_u->list, &td->io_u_freelist);
552 }
553
554 return 0;
555}
556
da86774e
JA
557static int switch_ioscheduler(struct thread_data *td)
558{
559 char tmp[256], tmp2[128];
560 FILE *f;
561 int ret;
562
f48b467c
JA
563 if (td->io_ops->flags & FIO_CPUIO)
564 return 0;
565
da86774e
JA
566 sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
567
568 f = fopen(tmp, "r+");
569 if (!f) {
570 td_verror(td, errno);
571 return 1;
572 }
573
574 /*
575 * Set io scheduler.
576 */
577 ret = fwrite(td->ioscheduler, strlen(td->ioscheduler), 1, f);
578 if (ferror(f) || ret != 1) {
579 td_verror(td, errno);
580 fclose(f);
581 return 1;
582 }
583
584 rewind(f);
585
586 /*
587 * Read back and check that the selected scheduler is now the default.
588 */
589 ret = fread(tmp, 1, sizeof(tmp), f);
590 if (ferror(f) || ret < 0) {
591 td_verror(td, errno);
592 fclose(f);
593 return 1;
594 }
595
596 sprintf(tmp2, "[%s]", td->ioscheduler);
597 if (!strstr(tmp, tmp2)) {
3b70d7e5 598 log_err("fio: io scheduler %s not found\n", td->ioscheduler);
da86774e
JA
599 td_verror(td, EINVAL);
600 fclose(f);
601 return 1;
602 }
603
604 fclose(f);
605 return 0;
606}
607
ebac4655
JA
608static void clear_io_state(struct thread_data *td)
609{
53cdc686
JA
610 struct fio_file *f;
611 int i;
ebac4655 612
ebac4655
JA
613 td->stat_io_bytes[0] = td->stat_io_bytes[1] = 0;
614 td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
20dc95c4 615 td->zone_bytes = 0;
ebac4655 616
53cdc686
JA
617 for_each_file(td, f, i) {
618 f->last_pos = 0;
619 if (td->io_ops->flags & FIO_SYNCIO)
620 lseek(f->fd, SEEK_SET, 0);
621
622 if (f->file_map)
623 memset(f->file_map, 0, f->num_maps * sizeof(long));
624 }
ebac4655
JA
625}
626
906c8d75
JA
627/*
628 * Entry point for the thread based jobs. The process based jobs end up
629 * here as well, after a little setup.
630 */
ebac4655
JA
631static void *thread_main(void *data)
632{
69008999 633 unsigned long long runtime[2];
ebac4655 634 struct thread_data *td = data;
ebac4655
JA
635
636 if (!td->use_thread)
637 setsid();
638
639 td->pid = getpid();
640
aea47d44
JA
641 INIT_LIST_HEAD(&td->io_u_freelist);
642 INIT_LIST_HEAD(&td->io_u_busylist);
643 INIT_LIST_HEAD(&td->io_hist_list);
644 INIT_LIST_HEAD(&td->io_log_list);
645
ebac4655
JA
646 if (init_io_u(td))
647 goto err;
648
649 if (fio_setaffinity(td) == -1) {
650 td_verror(td, errno);
651 goto err;
652 }
653
aea47d44
JA
654 if (init_iolog(td))
655 goto err;
656
ebac4655
JA
657 if (td->ioprio) {
658 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
659 td_verror(td, errno);
660 goto err;
661 }
662 }
663
1056eaad 664 if (nice(td->nice) == -1) {
b6f4d880
JA
665 td_verror(td, errno);
666 goto err;
667 }
668
75154845
JA
669 if (init_random_state(td))
670 goto err;
671
56f9498d
JA
672 if (td->ioscheduler && switch_ioscheduler(td))
673 goto err;
da86774e 674
75154845 675 td_set_runstate(td, TD_INITIALIZED);
bbfd6b00
JA
676 fio_sem_up(&startup_sem);
677 fio_sem_down(&td->mutex);
ebac4655 678
53cdc686 679 if (!td->create_serialize && setup_files(td))
ebac4655 680 goto err;
21972cde
JA
681 if (open_files(td))
682 goto err;
ebac4655 683
7d6c5283
JA
684 /*
685 * Do this late, as some IO engines would like to have the
686 * files setup prior to initializing structures.
687 */
688 if (td_io_init(td))
689 goto err;
690
69cfd7e0
JA
691 if (td->exec_prerun) {
692 if (system(td->exec_prerun) < 0)
693 goto err;
694 }
4e0ba8af 695
69008999 696 fio_gettime(&td->epoch, NULL);
36dff966 697 getrusage(RUSAGE_SELF, &td->ru_start);
69008999
JA
698
699 runtime[0] = runtime[1] = 0;
ebac4655 700 while (td->loops--) {
02bcaa8c 701 fio_gettime(&td->start, NULL);
ebac4655
JA
702 memcpy(&td->stat_sample_time, &td->start, sizeof(td->start));
703
704 if (td->ratemin)
705 memcpy(&td->lastrate, &td->stat_sample_time, sizeof(td->lastrate));
706
707 clear_io_state(td);
708 prune_io_piece_log(td);
709
2866c82d 710 if (td->io_ops->flags & FIO_CPUIO)
b990b5c0
JA
711 do_cpuio(td);
712 else
713 do_io(td);
ebac4655 714
69008999 715 runtime[td->ddir] += utime_since_now(&td->start);
aea47d44 716 if (td_rw(td) && td->io_bytes[td->ddir ^ 1])
69008999 717 runtime[td->ddir ^ 1] = runtime[td->ddir];
3d60d1ed 718
ebac4655
JA
719 if (td->error || td->terminate)
720 break;
721
722 if (td->verify == VERIFY_NONE)
723 continue;
724
725 clear_io_state(td);
02bcaa8c 726 fio_gettime(&td->start, NULL);
ebac4655
JA
727
728 do_verify(td);
729
69008999 730 runtime[DDIR_READ] += utime_since_now(&td->start);
ebac4655
JA
731
732 if (td->error || td->terminate)
733 break;
734 }
735
36dff966 736 update_rusage_stat(td);
69008999
JA
737 fio_gettime(&td->end_time, NULL);
738 td->runtime[0] = runtime[0] / 1000;
739 td->runtime[1] = runtime[1] / 1000;
740
ebac4655
JA
741 if (td->bw_log)
742 finish_log(td, td->bw_log, "bw");
743 if (td->slat_log)
744 finish_log(td, td->slat_log, "slat");
745 if (td->clat_log)
746 finish_log(td, td->clat_log, "clat");
076efc7c 747 if (td->write_iolog_file)
843a7413 748 write_iolog_close(td);
69cfd7e0
JA
749 if (td->exec_postrun) {
750 if (system(td->exec_postrun) < 0)
751 log_err("fio: postrun %s failed\n", td->exec_postrun);
752 }
ebac4655
JA
753
754 if (exitall_on_terminate)
6ce15a32 755 terminate_threads(td->groupid, 0);
ebac4655
JA
756
757err:
5bf13a5a
JA
758 if (td->error)
759 printf("fio: pid=%d, err=%d/%s\n", td->pid, td->error, td->verror);
53cdc686 760 close_files(td);
2866c82d 761 close_ioengine(td);
ebac4655 762 cleanup_io_u(td);
ebac4655
JA
763 td_set_runstate(td, TD_EXITED);
764 return NULL;
ebac4655
JA
765}
766
906c8d75
JA
767/*
768 * We cannot pass the td data into a forked process, so attach the td and
769 * pass it to the thread worker.
770 */
ebac4655
JA
771static void *fork_main(int shmid, int offset)
772{
773 struct thread_data *td;
774 void *data;
775
776 data = shmat(shmid, NULL, 0);
777 if (data == (void *) -1) {
778 perror("shmat");
779 return NULL;
780 }
781
782 td = data + offset * sizeof(struct thread_data);
783 thread_main(td);
784 shmdt(data);
785 return NULL;
786}
787
906c8d75
JA
788/*
789 * Run over the job map and reap the threads that have exited, if any.
790 */
ebac4655
JA
791static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
792{
34572e28 793 struct thread_data *td;
4d2413c6 794 int i, cputhreads, pending;
ebac4655
JA
795
796 /*
797 * reap exited threads (TD_EXITED -> TD_REAPED)
798 */
4d2413c6 799 pending = cputhreads = 0;
34572e28 800 for_each_td(td, i) {
84585003
JA
801 /*
802 * ->io_ops is NULL for a thread that has closed its
803 * io engine
804 */
805 if (td->io_ops && td->io_ops->flags & FIO_CPUIO)
b990b5c0
JA
806 cputhreads++;
807
4d2413c6
JA
808 if (td->runstate != TD_EXITED) {
809 if (td->runstate < TD_RUNNING)
810 pending++;
811
ebac4655 812 continue;
4d2413c6 813 }
ebac4655 814
437c9b71
JA
815 if (td->error)
816 exit_value++;
817
ebac4655
JA
818 td_set_runstate(td, TD_REAPED);
819
820 if (td->use_thread) {
821 long ret;
822
823 if (pthread_join(td->thread, (void *) &ret))
824 perror("thread_join");
825 } else
826 waitpid(td->pid, NULL, 0);
827
828 (*nr_running)--;
829 (*m_rate) -= td->ratemin;
830 (*t_rate) -= td->rate;
831 }
b990b5c0 832
4d2413c6 833 if (*nr_running == cputhreads && !pending)
6ce15a32 834 terminate_threads(TERMINATE_ALL, 0);
ebac4655
JA
835}
836
906c8d75
JA
837/*
838 * Main function for kicking off and reaping jobs, as needed.
839 */
ebac4655
JA
840static void run_threads(void)
841{
ebac4655
JA
842 struct thread_data *td;
843 unsigned long spent;
844 int i, todo, nr_running, m_rate, t_rate, nr_started;
fcb6ade2 845
2f9ade3c
JA
846 if (fio_pin_memory())
847 return;
ebac4655 848
c6ae0a5b
JA
849 if (!terse_output) {
850 printf("Starting %d thread%s\n", thread_number, thread_number > 1 ? "s" : "");
851 fflush(stdout);
852 }
c04f7ec3 853
4efa970e
JA
854 signal(SIGINT, sig_handler);
855 signal(SIGALRM, sig_handler);
856
ebac4655
JA
857 todo = thread_number;
858 nr_running = 0;
859 nr_started = 0;
860 m_rate = t_rate = 0;
861
34572e28 862 for_each_td(td, i) {
263e529f 863 print_status_init(td->thread_number - 1);
ebac4655 864
380cf265
JA
865 if (!td->create_serialize) {
866 init_disk_util(td);
ebac4655 867 continue;
380cf265 868 }
ebac4655
JA
869
870 /*
871 * do file setup here so it happens sequentially,
872 * we don't want X number of threads getting their
873 * client data interspersed on disk
874 */
53cdc686 875 if (setup_files(td)) {
5bf13a5a
JA
876 exit_value++;
877 if (td->error)
878 log_err("fio: pid=%d, err=%d/%s\n", td->pid, td->error, td->verror);
ebac4655
JA
879 td_set_runstate(td, TD_REAPED);
880 todo--;
881 }
380cf265
JA
882
883 init_disk_util(td);
ebac4655
JA
884 }
885
ebac4655 886 while (todo) {
75154845
JA
887 struct thread_data *map[MAX_JOBS];
888 struct timeval this_start;
889 int this_jobs = 0, left;
890
ebac4655
JA
891 /*
892 * create threads (TD_NOT_CREATED -> TD_CREATED)
893 */
34572e28 894 for_each_td(td, i) {
ebac4655
JA
895 if (td->runstate != TD_NOT_CREATED)
896 continue;
897
898 /*
899 * never got a chance to start, killed by other
900 * thread for some reason
901 */
902 if (td->terminate) {
903 todo--;
904 continue;
905 }
906
907 if (td->start_delay) {
263e529f 908 spent = mtime_since_genesis();
ebac4655
JA
909
910 if (td->start_delay * 1000 > spent)
911 continue;
912 }
913
914 if (td->stonewall && (nr_started || nr_running))
915 break;
916
75154845
JA
917 /*
918 * Set state to created. Thread will transition
919 * to TD_INITIALIZED when it's done setting up.
920 */
ebac4655 921 td_set_runstate(td, TD_CREATED);
75154845 922 map[this_jobs++] = td;
bbfd6b00 923 fio_sem_init(&startup_sem, 1);
ebac4655
JA
924 nr_started++;
925
926 if (td->use_thread) {
927 if (pthread_create(&td->thread, NULL, thread_main, td)) {
928 perror("thread_create");
929 nr_started--;
930 }
931 } else {
932 if (fork())
bbfd6b00 933 fio_sem_down(&startup_sem);
ebac4655
JA
934 else {
935 fork_main(shm_id, i);
936 exit(0);
937 }
938 }
939 }
940
941 /*
75154845
JA
942 * Wait for the started threads to transition to
943 * TD_INITIALIZED.
ebac4655 944 */
02bcaa8c 945 fio_gettime(&this_start, NULL);
75154845 946 left = this_jobs;
6ce15a32 947 while (left && !fio_abort) {
75154845
JA
948 if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
949 break;
950
951 usleep(100000);
952
953 for (i = 0; i < this_jobs; i++) {
954 td = map[i];
955 if (!td)
956 continue;
b6f4d880 957 if (td->runstate == TD_INITIALIZED) {
75154845
JA
958 map[i] = NULL;
959 left--;
b6f4d880
JA
960 } else if (td->runstate >= TD_EXITED) {
961 map[i] = NULL;
962 left--;
963 todo--;
964 nr_running++; /* work-around... */
75154845
JA
965 }
966 }
967 }
968
969 if (left) {
3b70d7e5 970 log_err("fio: %d jobs failed to start\n", left);
75154845
JA
971 for (i = 0; i < this_jobs; i++) {
972 td = map[i];
973 if (!td)
974 continue;
975 kill(td->pid, SIGTERM);
976 }
977 break;
978 }
979
980 /*
b6f4d880 981 * start created threads (TD_INITIALIZED -> TD_RUNNING).
75154845 982 */
34572e28 983 for_each_td(td, i) {
75154845 984 if (td->runstate != TD_INITIALIZED)
ebac4655
JA
985 continue;
986
987 td_set_runstate(td, TD_RUNNING);
988 nr_running++;
989 nr_started--;
990 m_rate += td->ratemin;
991 t_rate += td->rate;
75154845 992 todo--;
bbfd6b00 993 fio_sem_up(&td->mutex);
ebac4655
JA
994 }
995
996 reap_threads(&nr_running, &t_rate, &m_rate);
997
998 if (todo)
999 usleep(100000);
1000 }
1001
1002 while (nr_running) {
1003 reap_threads(&nr_running, &t_rate, &m_rate);
1004 usleep(10000);
1005 }
1006
1007 update_io_ticks();
2f9ade3c 1008 fio_unpin_memory();
ebac4655
JA
1009}
1010
ebac4655
JA
1011int main(int argc, char *argv[])
1012{
29d610e1
JA
1013 long ps;
1014
dbe1125e
JA
1015 /*
1016 * We need locale for number printing, if it isn't set then just
1017 * go with the US format.
1018 */
1019 if (!getenv("LC_NUMERIC"))
1020 setlocale(LC_NUMERIC, "en_US");
1021
ebac4655
JA
1022 if (parse_options(argc, argv))
1023 return 1;
1024
1025 if (!thread_number) {
3b70d7e5 1026 log_err("Nothing to do\n");
ebac4655
JA
1027 return 1;
1028 }
1029
29d610e1
JA
1030 ps = sysconf(_SC_PAGESIZE);
1031 if (ps < 0) {
1032 log_err("Failed to get page size\n");
1033 return 1;
1034 }
1035
1036 page_mask = ps - 1;
1037
bb3884d8
JA
1038 if (write_bw_log) {
1039 setup_log(&agg_io_log[DDIR_READ]);
1040 setup_log(&agg_io_log[DDIR_WRITE]);
1041 }
1042
ebac4655
JA
1043 disk_util_timer_arm();
1044
1045 run_threads();
6ce15a32 1046
bb3884d8 1047 if (!fio_abort) {
6ce15a32 1048 show_run_stats();
bb3884d8
JA
1049 if (write_bw_log) {
1050 __finish_log(agg_io_log[DDIR_READ],"agg-read_bw.log");
1051 __finish_log(agg_io_log[DDIR_WRITE],"agg-write_bw.log");
1052 }
1053 }
ebac4655 1054
437c9b71 1055 return exit_value;
ebac4655 1056}