-
Notifications
You must be signed in to change notification settings - Fork 1
/
backend.c
2428 lines (2016 loc) · 51.8 KB
/
backend.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* fio - the flexible io tester
*
* Copyright (C) 2005 Jens Axboe <[email protected]>
* Copyright (C) 2006-2012 Jens Axboe <[email protected]>
*
* The license below covers all files distributed with fio unless otherwise
* noted in the file itself.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <signal.h>
#include <time.h>
#include <locale.h>
#include <assert.h>
#include <time.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/ipc.h>
#include <sys/mman.h>
#include <math.h>
#include "fio.h"
#ifndef FIO_NO_HAVE_SHM_H
#include <sys/shm.h>
#endif
#include "hash.h"
#include "smalloc.h"
#include "verify.h"
#include "trim.h"
#include "diskutil.h"
#include "cgroup.h"
#include "profile.h"
#include "lib/rand.h"
#include "lib/memalign.h"
#include "server.h"
#include "lib/getrusage.h"
#include "idletime.h"
#include "err.h"
#include "workqueue.h"
#include "lib/mountcheck.h"
#include "rate-submit.h"
#include "helper_thread.h"
static struct fio_mutex *startup_mutex;
static struct flist_head *cgroup_list;
static char *cgroup_mnt;
static int exit_value;
static volatile int fio_abort;
static unsigned int nr_process = 0;
static unsigned int nr_thread = 0;
struct io_log *agg_io_log[DDIR_RWDIR_CNT];
int groupid = 0;
unsigned int thread_number = 0;
unsigned int stat_number = 0;
int shm_id = 0;
int temp_stall_ts;
unsigned long done_secs = 0;
#define PAGE_ALIGN(buf) \
(char *) (((uintptr_t) (buf) + page_mask) & ~page_mask)
#define JOB_START_TIMEOUT (5 * 1000)
static void sig_int(int sig)
{
if (threads) {
if (is_backend)
fio_server_got_signal(sig);
else {
log_info("\nfio: terminating on signal %d\n", sig);
log_info_flush();
exit_value = 128;
}
fio_terminate_threads(TERMINATE_ALL);
}
}
void sig_show_status(int sig)
{
show_running_run_stats();
}
static void set_sig_handlers(void)
{
struct sigaction act;
memset(&act, 0, sizeof(act));
act.sa_handler = sig_int;
act.sa_flags = SA_RESTART;
sigaction(SIGINT, &act, NULL);
memset(&act, 0, sizeof(act));
act.sa_handler = sig_int;
act.sa_flags = SA_RESTART;
sigaction(SIGTERM, &act, NULL);
/* Windows uses SIGBREAK as a quit signal from other applications */
#ifdef WIN32
memset(&act, 0, sizeof(act));
act.sa_handler = sig_int;
act.sa_flags = SA_RESTART;
sigaction(SIGBREAK, &act, NULL);
#endif
memset(&act, 0, sizeof(act));
act.sa_handler = sig_show_status;
act.sa_flags = SA_RESTART;
sigaction(SIGUSR1, &act, NULL);
if (is_backend) {
memset(&act, 0, sizeof(act));
act.sa_handler = sig_int;
act.sa_flags = SA_RESTART;
sigaction(SIGPIPE, &act, NULL);
}
}
/*
* Check if we are above the minimum rate given.
*/
static bool __check_min_rate(struct thread_data *td, struct timeval *now,
enum fio_ddir ddir)
{
unsigned long long bytes = 0;
unsigned long iops = 0;
unsigned long spent;
unsigned long rate;
unsigned int ratemin = 0;
unsigned int rate_iops = 0;
unsigned int rate_iops_min = 0;
assert(ddir_rw(ddir));
if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
return false;
/*
* allow a 2 second settle period in the beginning
*/
if (mtime_since(&td->start, now) < 2000)
return false;
iops += td->this_io_blocks[ddir];
bytes += td->this_io_bytes[ddir];
ratemin += td->o.ratemin[ddir];
rate_iops += td->o.rate_iops[ddir];
rate_iops_min += td->o.rate_iops_min[ddir];
/*
* if rate blocks is set, sample is running
*/
if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
spent = mtime_since(&td->lastrate[ddir], now);
if (spent < td->o.ratecycle)
return false;
if (td->o.rate[ddir] || td->o.ratemin[ddir]) {
/*
* check bandwidth specified rate
*/
if (bytes < td->rate_bytes[ddir]) {
log_err("%s: min rate %u not met\n", td->o.name,
ratemin);
return true;
} else {
if (spent)
rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
else
rate = 0;
if (rate < ratemin ||
bytes < td->rate_bytes[ddir]) {
log_err("%s: min rate %u not met, got"
" %luKB/sec\n", td->o.name,
ratemin, rate);
return true;
}
}
} else {
/*
* checks iops specified rate
*/
if (iops < rate_iops) {
log_err("%s: min iops rate %u not met\n",
td->o.name, rate_iops);
return true;
} else {
if (spent)
rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
else
rate = 0;
if (rate < rate_iops_min ||
iops < td->rate_blocks[ddir]) {
log_err("%s: min iops rate %u not met,"
" got %lu\n", td->o.name,
rate_iops_min, rate);
return true;
}
}
}
}
td->rate_bytes[ddir] = bytes;
td->rate_blocks[ddir] = iops;
memcpy(&td->lastrate[ddir], now, sizeof(*now));
return false;
}
static bool check_min_rate(struct thread_data *td, struct timeval *now)
{
bool ret = false;
if (td->bytes_done[DDIR_READ])
ret |= __check_min_rate(td, now, DDIR_READ);
if (td->bytes_done[DDIR_WRITE])
ret |= __check_min_rate(td, now, DDIR_WRITE);
if (td->bytes_done[DDIR_TRIM])
ret |= __check_min_rate(td, now, DDIR_TRIM);
return ret;
}
/*
* When job exits, we can cancel the in-flight IO if we are using async
* io. Attempt to do so.
*/
static void cleanup_pending_aio(struct thread_data *td)
{
int r;
/*
* get immediately available events, if any
*/
r = io_u_queued_complete(td, 0);
if (r < 0)
return;
/*
* now cancel remaining active events
*/
if (td->io_ops->cancel) {
struct io_u *io_u;
int i;
io_u_qiter(&td->io_u_all, io_u, i) {
if (io_u->flags & IO_U_F_FLIGHT) {
r = td->io_ops->cancel(td, io_u);
if (!r)
put_io_u(td, io_u);
}
}
}
if (td->cur_depth)
r = io_u_queued_complete(td, td->cur_depth);
}
/*
* Helper to handle the final sync of a file. Works just like the normal
* io path, just does everything sync.
*/
static bool fio_io_sync(struct thread_data *td, struct fio_file *f)
{
struct io_u *io_u = __get_io_u(td);
int ret;
if (!io_u)
return true;
io_u->ddir = DDIR_SYNC;
io_u->file = f;
if (td_io_prep(td, io_u)) {
put_io_u(td, io_u);
return true;
}
requeue:
ret = td_io_queue(td, io_u);
if (ret < 0) {
td_verror(td, io_u->error, "td_io_queue");
put_io_u(td, io_u);
return true;
} else if (ret == FIO_Q_QUEUED) {
if (td_io_commit(td))
return true;
if (io_u_queued_complete(td, 1) < 0)
return true;
} else if (ret == FIO_Q_COMPLETED) {
if (io_u->error) {
td_verror(td, io_u->error, "td_io_queue");
return true;
}
if (io_u_sync_complete(td, io_u) < 0)
return true;
} else if (ret == FIO_Q_BUSY) {
if (td_io_commit(td))
return true;
goto requeue;
}
return false;
}
static int fio_file_fsync(struct thread_data *td, struct fio_file *f)
{
int ret;
if (fio_file_open(f))
return fio_io_sync(td, f);
if (td_io_open_file(td, f))
return 1;
ret = fio_io_sync(td, f);
td_io_close_file(td, f);
return ret;
}
static inline void __update_tv_cache(struct thread_data *td)
{
fio_gettime(&td->tv_cache, NULL);
}
static inline void update_tv_cache(struct thread_data *td)
{
if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
__update_tv_cache(td);
}
static inline bool runtime_exceeded(struct thread_data *td, struct timeval *t)
{
if (in_ramp_time(td))
return false;
if (!td->o.timeout)
return false;
if (utime_since(&td->epoch, t) >= td->o.timeout)
return true;
return false;
}
/*
* We need to update the runtime consistently in ms, but keep a running
* tally of the current elapsed time in microseconds for sub millisecond
* updates.
*/
static inline void update_runtime(struct thread_data *td,
unsigned long long *elapsed_us,
const enum fio_ddir ddir)
{
if (ddir == DDIR_WRITE && td_write(td) && td->o.verify_only)
return;
td->ts.runtime[ddir] -= (elapsed_us[ddir] + 999) / 1000;
elapsed_us[ddir] += utime_since_now(&td->start);
td->ts.runtime[ddir] += (elapsed_us[ddir] + 999) / 1000;
}
static bool break_on_this_error(struct thread_data *td, enum fio_ddir ddir,
int *retptr)
{
int ret = *retptr;
if (ret < 0 || td->error) {
int err = td->error;
enum error_type_bit eb;
if (ret < 0)
err = -ret;
eb = td_error_type(ddir, err);
if (!(td->o.continue_on_error & (1 << eb)))
return true;
if (td_non_fatal_error(td, eb, err)) {
/*
* Continue with the I/Os in case of
* a non fatal error.
*/
update_error_count(td, err);
td_clear_error(td);
*retptr = 0;
return false;
} else if (td->o.fill_device && err == ENOSPC) {
/*
* We expect to hit this error if
* fill_device option is set.
*/
td_clear_error(td);
fio_mark_td_terminate(td);
return true;
} else {
/*
* Stop the I/O in case of a fatal
* error.
*/
update_error_count(td, err);
return true;
}
}
return false;
}
static void check_update_rusage(struct thread_data *td)
{
if (td->update_rusage) {
td->update_rusage = 0;
update_rusage_stat(td);
fio_mutex_up(td->rusage_sem);
}
}
static int wait_for_completions(struct thread_data *td, struct timeval *time)
{
const int full = queue_full(td);
int min_evts = 0;
int ret;
if (td->flags & TD_F_REGROW_LOGS) {
ret = io_u_quiesce(td);
regrow_logs(td);
return ret;
}
/*
* if the queue is full, we MUST reap at least 1 event
*/
min_evts = min(td->o.iodepth_batch_complete_min, td->cur_depth);
if ((full && !min_evts) || !td->o.iodepth_batch_complete_min)
min_evts = 1;
if (time && (__should_check_rate(td, DDIR_READ) ||
__should_check_rate(td, DDIR_WRITE) ||
__should_check_rate(td, DDIR_TRIM)))
fio_gettime(time, NULL);
do {
ret = io_u_queued_complete(td, min_evts);
if (ret < 0)
break;
} while (full && (td->cur_depth > td->o.iodepth_low));
return ret;
}
int io_queue_event(struct thread_data *td, struct io_u *io_u, int *ret,
enum fio_ddir ddir, uint64_t *bytes_issued, int from_verify,
struct timeval *comp_time)
{
int ret2;
switch (*ret) {
case FIO_Q_COMPLETED:
if (io_u->error) {
*ret = -io_u->error;
clear_io_u(td, io_u);
} else if (io_u->resid) {
int bytes = io_u->xfer_buflen - io_u->resid;
struct fio_file *f = io_u->file;
if (bytes_issued)
*bytes_issued += bytes;
if (!from_verify)
trim_io_piece(td, io_u);
/*
* zero read, fail
*/
if (!bytes) {
if (!from_verify)
unlog_io_piece(td, io_u);
td_verror(td, EIO, "full resid");
put_io_u(td, io_u);
break;
}
io_u->xfer_buflen = io_u->resid;
io_u->xfer_buf += bytes;
io_u->offset += bytes;
if (ddir_rw(io_u->ddir))
td->ts.short_io_u[io_u->ddir]++;
f = io_u->file;
if (io_u->offset == f->real_file_size)
goto sync_done;
requeue_io_u(td, &io_u);
} else {
sync_done:
if (comp_time && (__should_check_rate(td, DDIR_READ) ||
__should_check_rate(td, DDIR_WRITE) ||
__should_check_rate(td, DDIR_TRIM)))
fio_gettime(comp_time, NULL);
*ret = io_u_sync_complete(td, io_u);
if (*ret < 0)
break;
}
if (td->flags & TD_F_REGROW_LOGS)
regrow_logs(td);
/*
* when doing I/O (not when verifying),
* check for any errors that are to be ignored
*/
if (!from_verify)
break;
return 0;
case FIO_Q_QUEUED:
/*
* if the engine doesn't have a commit hook,
* the io_u is really queued. if it does have such
* a hook, it has to call io_u_queued() itself.
*/
if (td->io_ops->commit == NULL)
io_u_queued(td, io_u);
if (bytes_issued)
*bytes_issued += io_u->xfer_buflen;
break;
case FIO_Q_BUSY:
if (!from_verify)
unlog_io_piece(td, io_u);
requeue_io_u(td, &io_u);
ret2 = td_io_commit(td);
if (ret2 < 0)
*ret = ret2;
break;
default:
assert(*ret < 0);
td_verror(td, -(*ret), "td_io_queue");
break;
}
if (break_on_this_error(td, ddir, ret))
return 1;
return 0;
}
static inline bool io_in_polling(struct thread_data *td)
{
return !td->o.iodepth_batch_complete_min &&
!td->o.iodepth_batch_complete_max;
}
/*
* Unlinks files from thread data fio_file structure
*/
static int unlink_all_files(struct thread_data *td)
{
struct fio_file *f;
unsigned int i;
int ret = 0;
for_each_file(td, f, i) {
if (f->filetype != FIO_TYPE_FILE)
continue;
ret = td_io_unlink_file(td, f);
if (ret)
break;
}
if (ret)
td_verror(td, ret, "unlink_all_files");
return ret;
}
/*
* The main verify engine. Runs over the writes we previously submitted,
* reads the blocks back in, and checks the crc/md5 of the data.
*/
static void do_verify(struct thread_data *td, uint64_t verify_bytes)
{
struct fio_file *f;
struct io_u *io_u;
int ret, min_events;
unsigned int i;
dprint(FD_VERIFY, "starting loop\n");
/*
* sync io first and invalidate cache, to make sure we really
* read from disk.
*/
for_each_file(td, f, i) {
if (!fio_file_open(f))
continue;
if (fio_io_sync(td, f))
break;
if (file_invalidate_cache(td, f))
break;
}
check_update_rusage(td);
if (td->error)
return;
/*
* verify_state needs to be reset before verification
* proceeds so that expected random seeds match actual
* random seeds in headers. The main loop will reset
* all random number generators if randrepeat is set.
*/
if (!td->o.rand_repeatable)
td_fill_verify_state_seed(td);
td_set_runstate(td, TD_VERIFYING);
io_u = NULL;
while (!td->terminate) {
enum fio_ddir ddir;
int full;
update_tv_cache(td);
check_update_rusage(td);
if (runtime_exceeded(td, &td->tv_cache)) {
__update_tv_cache(td);
if (runtime_exceeded(td, &td->tv_cache)) {
fio_mark_td_terminate(td);
break;
}
}
if (flow_threshold_exceeded(td))
continue;
if (!td->o.experimental_verify) {
io_u = __get_io_u(td);
if (!io_u)
break;
if (get_next_verify(td, io_u)) {
put_io_u(td, io_u);
break;
}
if (td_io_prep(td, io_u)) {
put_io_u(td, io_u);
break;
}
} else {
if (ddir_rw_sum(td->bytes_done) + td->o.rw_min_bs > verify_bytes)
break;
while ((io_u = get_io_u(td)) != NULL) {
if (IS_ERR_OR_NULL(io_u)) {
io_u = NULL;
ret = FIO_Q_BUSY;
goto reap;
}
/*
* We are only interested in the places where
* we wrote or trimmed IOs. Turn those into
* reads for verification purposes.
*/
if (io_u->ddir == DDIR_READ) {
/*
* Pretend we issued it for rwmix
* accounting
*/
td->io_issues[DDIR_READ]++;
put_io_u(td, io_u);
continue;
} else if (io_u->ddir == DDIR_TRIM) {
io_u->ddir = DDIR_READ;
io_u_set(td, io_u, IO_U_F_TRIMMED);
break;
} else if (io_u->ddir == DDIR_WRITE) {
io_u->ddir = DDIR_READ;
break;
} else {
put_io_u(td, io_u);
continue;
}
}
if (!io_u)
break;
}
if (verify_state_should_stop(td, io_u)) {
put_io_u(td, io_u);
break;
}
if (td->o.verify_async)
io_u->end_io = verify_io_u_async;
else
io_u->end_io = verify_io_u;
ddir = io_u->ddir;
if (!td->o.disable_slat)
fio_gettime(&io_u->start_time, NULL);
ret = td_io_queue(td, io_u);
if (io_queue_event(td, io_u, &ret, ddir, NULL, 1, NULL))
break;
/*
* if we can queue more, do so. but check if there are
* completed io_u's first. Note that we can get BUSY even
* without IO queued, if the system is resource starved.
*/
reap:
full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
if (full || io_in_polling(td))
ret = wait_for_completions(td, NULL);
if (ret < 0)
break;
}
check_update_rusage(td);
if (!td->error) {
min_events = td->cur_depth;
if (min_events)
ret = io_u_queued_complete(td, min_events);
} else
cleanup_pending_aio(td);
td_set_runstate(td, TD_RUNNING);
dprint(FD_VERIFY, "exiting loop\n");
}
static bool exceeds_number_ios(struct thread_data *td)
{
unsigned long long number_ios;
if (!td->o.number_ios)
return false;
number_ios = ddir_rw_sum(td->io_blocks);
number_ios += td->io_u_queued + td->io_u_in_flight;
return number_ios >= (td->o.number_ios * td->loops);
}
static bool io_issue_bytes_exceeded(struct thread_data *td)
{
unsigned long long bytes, limit;
if (td_rw(td))
bytes = td->io_issue_bytes[DDIR_READ] + td->io_issue_bytes[DDIR_WRITE];
else if (td_write(td))
bytes = td->io_issue_bytes[DDIR_WRITE];
else if (td_read(td))
bytes = td->io_issue_bytes[DDIR_READ];
else
bytes = td->io_issue_bytes[DDIR_TRIM];
if (td->o.io_limit)
limit = td->o.io_limit;
else
limit = td->o.size;
limit *= td->loops;
return bytes >= limit || exceeds_number_ios(td);
}
static bool io_complete_bytes_exceeded(struct thread_data *td)
{
unsigned long long bytes, limit;
if (td_rw(td))
bytes = td->this_io_bytes[DDIR_READ] + td->this_io_bytes[DDIR_WRITE];
else if (td_write(td))
bytes = td->this_io_bytes[DDIR_WRITE];
else if (td_read(td))
bytes = td->this_io_bytes[DDIR_READ];
else
bytes = td->this_io_bytes[DDIR_TRIM];
if (td->o.io_limit)
limit = td->o.io_limit;
else
limit = td->o.size;
limit *= td->loops;
return bytes >= limit || exceeds_number_ios(td);
}
/*
* used to calculate the next io time for rate control
*
*/
static long long usec_for_io(struct thread_data *td, enum fio_ddir ddir)
{
uint64_t secs, remainder, bps, bytes, iops;
assert(!(td->flags & TD_F_CHILD));
bytes = td->rate_io_issue_bytes[ddir];
bps = td->rate_bps[ddir];
if (td->o.rate_process == RATE_PROCESS_POISSON) {
uint64_t val;
iops = bps / td->o.bs[ddir];
val = (int64_t) (1000000 / iops) *
-logf(__rand_0_1(&td->poisson_state));
if (val) {
dprint(FD_RATE, "poisson rate iops=%llu\n",
(unsigned long long) 1000000 / val);
}
td->last_usec += val;
return td->last_usec;
} else if (bps) {
secs = bytes / bps;
remainder = bytes % bps;
return remainder * 1000000 / bps + secs * 1000000;
}
return 0;
}
/*
* Main IO worker function. It retrieves io_u's to process and queues
* and reaps them, checking for rate and errors along the way.
*
* Returns number of bytes written and trimmed.
*/
static void do_io(struct thread_data *td, uint64_t *bytes_done)
{
unsigned int i;
int ret = 0;
uint64_t total_bytes, bytes_issued = 0;
for (i = 0; i < DDIR_RWDIR_CNT; i++)
bytes_done[i] = td->bytes_done[i];
if (in_ramp_time(td))
td_set_runstate(td, TD_RAMP);
else
td_set_runstate(td, TD_RUNNING);
lat_target_init(td);
total_bytes = td->o.size;
/*
* Allow random overwrite workloads to write up to io_limit
* before starting verification phase as 'size' doesn't apply.
*/
if (td_write(td) && td_random(td) && td->o.norandommap)
total_bytes = max(total_bytes, (uint64_t) td->o.io_limit);
/*
* If verify_backlog is enabled, we'll run the verify in this
* handler as well. For that case, we may need up to twice the
* amount of bytes.
*/
if (td->o.verify != VERIFY_NONE &&
(td_write(td) && td->o.verify_backlog))
total_bytes += td->o.size;
/* In trimwrite mode, each byte is trimmed and then written, so
* allow total_bytes to be twice as big */
if (td_trimwrite(td))
total_bytes += td->total_io_size;
while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
(!flist_empty(&td->trim_list)) || !io_issue_bytes_exceeded(td) ||
td->o.time_based) {
struct timeval comp_time;
struct io_u *io_u;
int full;
enum fio_ddir ddir;
check_update_rusage(td);
if (td->terminate || td->done)
break;
update_tv_cache(td);
if (runtime_exceeded(td, &td->tv_cache)) {
__update_tv_cache(td);
if (runtime_exceeded(td, &td->tv_cache)) {
fio_mark_td_terminate(td);
break;
}
}
if (flow_threshold_exceeded(td))
continue;
/*
* Break if we exceeded the bytes. The exception is time
* based runs, but we still need to break out of the loop
* for those to run verification, if enabled.
*/
if (bytes_issued >= total_bytes &&
(!td->o.time_based ||
(td->o.time_based && td->o.verify != VERIFY_NONE)))
break;
io_u = get_io_u(td);
if (IS_ERR_OR_NULL(io_u)) {
int err = PTR_ERR(io_u);
io_u = NULL;
if (err == -EBUSY) {
ret = FIO_Q_BUSY;
goto reap;
}
if (td->o.latency_target)
goto reap;
break;
}
ddir = io_u->ddir;
/*
* Add verification end_io handler if:
* - Asked to verify (!td_rw(td))
* - Or the io_u is from our verify list (mixed write/ver)
*/
if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
((io_u->flags & IO_U_F_VER_LIST) || !td_rw(td))) {
if (!td->o.verify_pattern_bytes) {
io_u->rand_seed = __rand(&td->verify_state);
if (sizeof(int) != sizeof(long *))
io_u->rand_seed *= __rand(&td->verify_state);
}
if (verify_state_should_stop(td, io_u)) {
put_io_u(td, io_u);
break;
}
if (td->o.verify_async)
io_u->end_io = verify_io_u_async;
else
io_u->end_io = verify_io_u;
td_set_runstate(td, TD_VERIFYING);
} else if (in_ramp_time(td))
td_set_runstate(td, TD_RAMP);
else
td_set_runstate(td, TD_RUNNING);
/*
* Always log IO before it's issued, so we know the specific
* order of it. The logged unit will track when the IO has
* completed.
*/
if (td_write(td) && io_u->ddir == DDIR_WRITE &&
td->o.do_verify &&
td->o.verify != VERIFY_NONE &&
!td->o.experimental_verify)
log_io_piece(td, io_u);
if (td->o.io_submit_mode == IO_MODE_OFFLOAD) {
const unsigned long blen = io_u->xfer_buflen;
const enum fio_ddir ddir = acct_ddir(io_u);
if (td->error)
break;
workqueue_enqueue(&td->io_wq, &io_u->work);
ret = FIO_Q_QUEUED;
if (ddir_rw(ddir)) {
td->io_issues[ddir]++;
td->io_issue_bytes[ddir] += blen;
td->rate_io_issue_bytes[ddir] += blen;
}