forked from axboe/fio
-
Notifications
You must be signed in to change notification settings - Fork 0
/
iolog.c
1617 lines (1321 loc) · 32.4 KB
/
iolog.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
/*
* Code related to writing an iolog of what a thread is doing, and to
* later read that back and replay
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#ifdef CONFIG_ZLIB
#include <zlib.h>
#endif
#include "flist.h"
#include "fio.h"
#include "trim.h"
#include "filelock.h"
#include "smalloc.h"
#include "blktrace.h"
#include "pshared.h"
static int iolog_flush(struct io_log *log);
static const char iolog_ver2[] = "fio version 2 iolog";
void queue_io_piece(struct thread_data *td, struct io_piece *ipo)
{
flist_add_tail(&ipo->list, &td->io_log_list);
td->total_io_size += ipo->len;
}
void log_io_u(const struct thread_data *td, const struct io_u *io_u)
{
if (!td->o.write_iolog_file)
return;
fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name,
io_ddir_name(io_u->ddir),
io_u->offset, io_u->buflen);
}
void log_file(struct thread_data *td, struct fio_file *f,
enum file_log_act what)
{
const char *act[] = { "add", "open", "close" };
assert(what < 3);
if (!td->o.write_iolog_file)
return;
/*
* this happens on the pre-open/close done before the job starts
*/
if (!td->iolog_f)
return;
fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]);
}
static void iolog_delay(struct thread_data *td, unsigned long delay)
{
uint64_t usec = utime_since_now(&td->last_issue);
unsigned long orig_delay = delay;
uint64_t this_delay;
struct timespec ts;
if (delay < td->time_offset) {
td->time_offset = 0;
return;
}
delay -= td->time_offset;
if (delay < usec)
return;
delay -= usec;
fio_gettime(&ts, NULL);
while (delay && !td->terminate) {
this_delay = delay;
if (this_delay > 500000)
this_delay = 500000;
usec_sleep(td, this_delay);
delay -= this_delay;
}
usec = utime_since_now(&ts);
if (usec > orig_delay)
td->time_offset = usec - orig_delay;
else
td->time_offset = 0;
}
static int ipo_special(struct thread_data *td, struct io_piece *ipo)
{
struct fio_file *f;
int ret;
/*
* Not a special ipo
*/
if (ipo->ddir != DDIR_INVAL)
return 0;
f = td->files[ipo->fileno];
switch (ipo->file_action) {
case FIO_LOG_OPEN_FILE:
if (td->o.replay_redirect && fio_file_open(f)) {
dprint(FD_FILE, "iolog: ignoring re-open of file %s\n",
f->file_name);
break;
}
ret = td_io_open_file(td, f);
if (!ret)
break;
td_verror(td, ret, "iolog open file");
return -1;
case FIO_LOG_CLOSE_FILE:
td_io_close_file(td, f);
break;
case FIO_LOG_UNLINK_FILE:
td_io_unlink_file(td, f);
break;
default:
log_err("fio: bad file action %d\n", ipo->file_action);
break;
}
return 1;
}
int read_iolog_get(struct thread_data *td, struct io_u *io_u)
{
struct io_piece *ipo;
unsigned long elapsed;
while (!flist_empty(&td->io_log_list)) {
int ret;
ipo = flist_first_entry(&td->io_log_list, struct io_piece, list);
flist_del(&ipo->list);
remove_trim_entry(td, ipo);
ret = ipo_special(td, ipo);
if (ret < 0) {
free(ipo);
break;
} else if (ret > 0) {
free(ipo);
continue;
}
io_u->ddir = ipo->ddir;
if (ipo->ddir != DDIR_WAIT) {
io_u->offset = ipo->offset;
io_u->buflen = ipo->len;
io_u->file = td->files[ipo->fileno];
get_file(io_u->file);
dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset,
io_u->buflen, io_u->file->file_name);
if (ipo->delay)
iolog_delay(td, ipo->delay);
} else {
elapsed = mtime_since_genesis();
if (ipo->delay > elapsed)
usec_sleep(td, (ipo->delay - elapsed) * 1000);
}
free(ipo);
if (io_u->ddir != DDIR_WAIT)
return 0;
}
td->done = 1;
return 1;
}
void prune_io_piece_log(struct thread_data *td)
{
struct io_piece *ipo;
struct fio_rb_node *n;
while ((n = rb_first(&td->io_hist_tree)) != NULL) {
ipo = rb_entry(n, struct io_piece, rb_node);
rb_erase(n, &td->io_hist_tree);
remove_trim_entry(td, ipo);
td->io_hist_len--;
free(ipo);
}
while (!flist_empty(&td->io_hist_list)) {
ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
flist_del(&ipo->list);
remove_trim_entry(td, ipo);
td->io_hist_len--;
free(ipo);
}
}
/*
* log a successful write, so we can unwind the log for verify
*/
void log_io_piece(struct thread_data *td, struct io_u *io_u)
{
struct fio_rb_node **p, *parent;
struct io_piece *ipo, *__ipo;
ipo = calloc(1, sizeof(struct io_piece));
init_ipo(ipo);
ipo->file = io_u->file;
ipo->offset = io_u->offset;
ipo->len = io_u->buflen;
ipo->numberio = io_u->numberio;
ipo->flags = IP_F_IN_FLIGHT;
io_u->ipo = ipo;
if (io_u_should_trim(td, io_u)) {
flist_add_tail(&ipo->trim_list, &td->trim_list);
td->trim_entries++;
}
/*
* Only sort writes if we don't have a random map in which case we need
* to check for duplicate blocks and drop the old one, which we rely on
* the rb insert/lookup for handling.
*/
if (file_randommap(td, ipo->file)) {
INIT_FLIST_HEAD(&ipo->list);
flist_add_tail(&ipo->list, &td->io_hist_list);
ipo->flags |= IP_F_ONLIST;
td->io_hist_len++;
return;
}
RB_CLEAR_NODE(&ipo->rb_node);
/*
* Sort the entry into the verification list
*/
restart:
p = &td->io_hist_tree.rb_node;
parent = NULL;
while (*p) {
int overlap = 0;
parent = *p;
__ipo = rb_entry(parent, struct io_piece, rb_node);
if (ipo->file < __ipo->file)
p = &(*p)->rb_left;
else if (ipo->file > __ipo->file)
p = &(*p)->rb_right;
else if (ipo->offset < __ipo->offset) {
p = &(*p)->rb_left;
overlap = ipo->offset + ipo->len > __ipo->offset;
}
else if (ipo->offset > __ipo->offset) {
p = &(*p)->rb_right;
overlap = __ipo->offset + __ipo->len > ipo->offset;
}
else
overlap = 1;
if (overlap) {
dprint(FD_IO, "iolog: overlap %llu/%lu, %llu/%lu\n",
__ipo->offset, __ipo->len,
ipo->offset, ipo->len);
td->io_hist_len--;
rb_erase(parent, &td->io_hist_tree);
remove_trim_entry(td, __ipo);
if (!(__ipo->flags & IP_F_IN_FLIGHT))
free(__ipo);
goto restart;
}
}
rb_link_node(&ipo->rb_node, parent, p);
rb_insert_color(&ipo->rb_node, &td->io_hist_tree);
ipo->flags |= IP_F_ONRB;
td->io_hist_len++;
}
void unlog_io_piece(struct thread_data *td, struct io_u *io_u)
{
struct io_piece *ipo = io_u->ipo;
if (td->ts.nr_block_infos) {
uint32_t *info = io_u_block_info(td, io_u);
if (BLOCK_INFO_STATE(*info) < BLOCK_STATE_TRIM_FAILURE) {
if (io_u->ddir == DDIR_TRIM)
*info = BLOCK_INFO_SET_STATE(*info,
BLOCK_STATE_TRIM_FAILURE);
else if (io_u->ddir == DDIR_WRITE)
*info = BLOCK_INFO_SET_STATE(*info,
BLOCK_STATE_WRITE_FAILURE);
}
}
if (!ipo)
return;
if (ipo->flags & IP_F_ONRB)
rb_erase(&ipo->rb_node, &td->io_hist_tree);
else if (ipo->flags & IP_F_ONLIST)
flist_del(&ipo->list);
free(ipo);
io_u->ipo = NULL;
td->io_hist_len--;
}
void trim_io_piece(const struct io_u *io_u)
{
struct io_piece *ipo = io_u->ipo;
if (!ipo)
return;
ipo->len = io_u->xfer_buflen - io_u->resid;
}
void write_iolog_close(struct thread_data *td)
{
fflush(td->iolog_f);
fclose(td->iolog_f);
free(td->iolog_buf);
td->iolog_f = NULL;
td->iolog_buf = NULL;
}
/*
* Read version 2 iolog data. It is enhanced to include per-file logging,
* syncs, etc.
*/
static bool read_iolog2(struct thread_data *td, FILE *f)
{
unsigned long long offset;
unsigned int bytes;
int reads, writes, waits, fileno = 0, file_action = 0; /* stupid gcc */
char *rfname, *fname, *act;
char *str, *p;
enum fio_ddir rw;
free_release_files(td);
/*
* Read in the read iolog and store it, reuse the infrastructure
* for doing verifications.
*/
str = malloc(4096);
rfname = fname = malloc(256+16);
act = malloc(256+16);
reads = writes = waits = 0;
while ((p = fgets(str, 4096, f)) != NULL) {
struct io_piece *ipo;
int r;
r = sscanf(p, "%256s %256s %llu %u", rfname, act, &offset,
&bytes);
if (td->o.replay_redirect)
fname = td->o.replay_redirect;
if (r == 4) {
/*
* Check action first
*/
if (!strcmp(act, "wait"))
rw = DDIR_WAIT;
else if (!strcmp(act, "read"))
rw = DDIR_READ;
else if (!strcmp(act, "write"))
rw = DDIR_WRITE;
else if (!strcmp(act, "sync"))
rw = DDIR_SYNC;
else if (!strcmp(act, "datasync"))
rw = DDIR_DATASYNC;
else if (!strcmp(act, "trim"))
rw = DDIR_TRIM;
else {
log_err("fio: bad iolog file action: %s\n",
act);
continue;
}
fileno = get_fileno(td, fname);
} else if (r == 2) {
rw = DDIR_INVAL;
if (!strcmp(act, "add")) {
if (td->o.replay_redirect &&
get_fileno(td, fname) != -1) {
dprint(FD_FILE, "iolog: ignoring"
" re-add of file %s\n", fname);
} else {
fileno = add_file(td, fname, 0, 1);
file_action = FIO_LOG_ADD_FILE;
}
continue;
} else if (!strcmp(act, "open")) {
fileno = get_fileno(td, fname);
file_action = FIO_LOG_OPEN_FILE;
} else if (!strcmp(act, "close")) {
fileno = get_fileno(td, fname);
file_action = FIO_LOG_CLOSE_FILE;
} else {
log_err("fio: bad iolog file action: %s\n",
act);
continue;
}
} else {
log_err("bad iolog2: %s\n", p);
continue;
}
if (rw == DDIR_READ)
reads++;
else if (rw == DDIR_WRITE) {
/*
* Don't add a write for ro mode
*/
if (read_only)
continue;
writes++;
} else if (rw == DDIR_WAIT) {
if (td->o.no_stall)
continue;
waits++;
} else if (rw == DDIR_INVAL) {
} else if (!ddir_sync(rw)) {
log_err("bad ddir: %d\n", rw);
continue;
}
/*
* Make note of file
*/
ipo = calloc(1, sizeof(*ipo));
init_ipo(ipo);
ipo->ddir = rw;
if (rw == DDIR_WAIT) {
ipo->delay = offset;
} else {
if (td->o.replay_scale)
ipo->offset = offset / td->o.replay_scale;
else
ipo->offset = offset;
ipo_bytes_align(td->o.replay_align, ipo);
ipo->len = bytes;
if (rw != DDIR_INVAL && bytes > td->o.max_bs[rw])
td->o.max_bs[rw] = bytes;
ipo->fileno = fileno;
ipo->file_action = file_action;
td->o.size += bytes;
}
queue_io_piece(td, ipo);
}
free(str);
free(act);
free(rfname);
if (writes && read_only) {
log_err("fio: <%s> skips replay of %d writes due to"
" read-only\n", td->o.name, writes);
writes = 0;
}
if (!reads && !writes && !waits)
return false;
else if (reads && !writes)
td->o.td_ddir = TD_DDIR_READ;
else if (!reads && writes)
td->o.td_ddir = TD_DDIR_WRITE;
else
td->o.td_ddir = TD_DDIR_RW;
return true;
}
/*
* open iolog, check version, and call appropriate parser
*/
static bool init_iolog_read(struct thread_data *td)
{
char buffer[256], *p;
FILE *f;
bool ret;
f = fopen(td->o.read_iolog_file, "r");
if (!f) {
perror("fopen read iolog");
return false;
}
p = fgets(buffer, sizeof(buffer), f);
if (!p) {
td_verror(td, errno, "iolog read");
log_err("fio: unable to read iolog\n");
fclose(f);
return false;
}
/*
* version 2 of the iolog stores a specific string as the
* first line, check for that
*/
if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2)))
ret = read_iolog2(td, f);
else {
log_err("fio: iolog version 1 is no longer supported\n");
ret = false;
}
fclose(f);
return ret;
}
/*
* Set up a log for storing io patterns.
*/
static bool init_iolog_write(struct thread_data *td)
{
struct fio_file *ff;
FILE *f;
unsigned int i;
f = fopen(td->o.write_iolog_file, "a");
if (!f) {
perror("fopen write iolog");
return false;
}
/*
* That's it for writing, setup a log buffer and we're done.
*/
td->iolog_f = f;
td->iolog_buf = malloc(8192);
setvbuf(f, td->iolog_buf, _IOFBF, 8192);
/*
* write our version line
*/
if (fprintf(f, "%s\n", iolog_ver2) < 0) {
perror("iolog init\n");
return false;
}
/*
* add all known files
*/
for_each_file(td, ff, i)
log_file(td, ff, FIO_LOG_ADD_FILE);
return true;
}
bool init_iolog(struct thread_data *td)
{
bool ret;
if (td->o.read_iolog_file) {
int need_swap;
/*
* Check if it's a blktrace file and load that if possible.
* Otherwise assume it's a normal log file and load that.
*/
if (is_blktrace(td->o.read_iolog_file, &need_swap))
ret = load_blktrace(td, td->o.read_iolog_file, need_swap);
else
ret = init_iolog_read(td);
} else if (td->o.write_iolog_file)
ret = init_iolog_write(td);
else
ret = true;
if (!ret)
td_verror(td, EINVAL, "failed initializing iolog");
return ret;
}
void setup_log(struct io_log **log, struct log_params *p,
const char *filename)
{
struct io_log *l;
int i;
struct io_u_plat_entry *entry;
struct flist_head *list;
l = scalloc(1, sizeof(*l));
INIT_FLIST_HEAD(&l->io_logs);
l->log_type = p->log_type;
l->log_offset = p->log_offset;
l->log_gz = p->log_gz;
l->log_gz_store = p->log_gz_store;
l->avg_msec = p->avg_msec;
l->hist_msec = p->hist_msec;
l->hist_coarseness = p->hist_coarseness;
l->filename = strdup(filename);
l->td = p->td;
/* Initialize histogram lists for each r/w direction,
* with initial io_u_plat of all zeros:
*/
for (i = 0; i < DDIR_RWDIR_CNT; i++) {
list = &l->hist_window[i].list;
INIT_FLIST_HEAD(list);
entry = calloc(1, sizeof(struct io_u_plat_entry));
flist_add(&entry->list, list);
}
if (l->td && l->td->o.io_submit_mode != IO_MODE_OFFLOAD) {
struct io_logs *__p;
__p = calloc(1, sizeof(*l->pending));
__p->max_samples = DEF_LOG_ENTRIES;
__p->log = calloc(__p->max_samples, log_entry_sz(l));
l->pending = __p;
}
if (l->log_offset)
l->log_ddir_mask = LOG_OFFSET_SAMPLE_BIT;
INIT_FLIST_HEAD(&l->chunk_list);
if (l->log_gz && !p->td)
l->log_gz = 0;
else if (l->log_gz || l->log_gz_store) {
mutex_init_pshared(&l->chunk_lock);
mutex_init_pshared(&l->deferred_free_lock);
p->td->flags |= TD_F_COMPRESS_LOG;
}
*log = l;
}
#ifdef CONFIG_SETVBUF
static void *set_file_buffer(FILE *f)
{
size_t size = 1048576;
void *buf;
buf = malloc(size);
setvbuf(f, buf, _IOFBF, size);
return buf;
}
static void clear_file_buffer(void *buf)
{
free(buf);
}
#else
static void *set_file_buffer(FILE *f)
{
return NULL;
}
static void clear_file_buffer(void *buf)
{
}
#endif
void free_log(struct io_log *log)
{
while (!flist_empty(&log->io_logs)) {
struct io_logs *cur_log;
cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
flist_del_init(&cur_log->list);
free(cur_log->log);
sfree(cur_log);
}
if (log->pending) {
free(log->pending->log);
free(log->pending);
log->pending = NULL;
}
free(log->pending);
free(log->filename);
sfree(log);
}
uint64_t hist_sum(int j, int stride, uint64_t *io_u_plat,
uint64_t *io_u_plat_last)
{
uint64_t sum;
int k;
if (io_u_plat_last) {
for (k = sum = 0; k < stride; k++)
sum += io_u_plat[j + k] - io_u_plat_last[j + k];
} else {
for (k = sum = 0; k < stride; k++)
sum += io_u_plat[j + k];
}
return sum;
}
static void flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
uint64_t sample_size)
{
struct io_sample *s;
int log_offset;
uint64_t i, j, nr_samples;
struct io_u_plat_entry *entry, *entry_before;
uint64_t *io_u_plat;
uint64_t *io_u_plat_before;
int stride = 1 << hist_coarseness;
if (!sample_size)
return;
s = __get_sample(samples, 0, 0);
log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
nr_samples = sample_size / __log_entry_sz(log_offset);
for (i = 0; i < nr_samples; i++) {
s = __get_sample(samples, log_offset, i);
entry = s->data.plat_entry;
io_u_plat = entry->io_u_plat;
entry_before = flist_first_entry(&entry->list, struct io_u_plat_entry, list);
io_u_plat_before = entry_before->io_u_plat;
fprintf(f, "%lu, %u, %u, ", (unsigned long) s->time,
io_sample_ddir(s), s->bs);
for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
fprintf(f, "%llu, ", (unsigned long long)
hist_sum(j, stride, io_u_plat, io_u_plat_before));
}
fprintf(f, "%llu\n", (unsigned long long)
hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat,
io_u_plat_before));
flist_del(&entry_before->list);
free(entry_before);
}
}
void flush_samples(FILE *f, void *samples, uint64_t sample_size)
{
struct io_sample *s;
int log_offset;
uint64_t i, nr_samples;
if (!sample_size)
return;
s = __get_sample(samples, 0, 0);
log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
nr_samples = sample_size / __log_entry_sz(log_offset);
for (i = 0; i < nr_samples; i++) {
s = __get_sample(samples, log_offset, i);
if (!log_offset) {
fprintf(f, "%lu, %" PRId64 ", %u, %u\n",
(unsigned long) s->time,
s->data.val,
io_sample_ddir(s), s->bs);
} else {
struct io_sample_offset *so = (void *) s;
fprintf(f, "%lu, %" PRId64 ", %u, %u, %llu\n",
(unsigned long) s->time,
s->data.val,
io_sample_ddir(s), s->bs,
(unsigned long long) so->offset);
}
}
}
#ifdef CONFIG_ZLIB
struct iolog_flush_data {
struct workqueue_work work;
struct io_log *log;
void *samples;
uint32_t nr_samples;
bool free;
};
#define GZ_CHUNK 131072
static struct iolog_compress *get_new_chunk(unsigned int seq)
{
struct iolog_compress *c;
c = malloc(sizeof(*c));
INIT_FLIST_HEAD(&c->list);
c->buf = malloc(GZ_CHUNK);
c->len = 0;
c->seq = seq;
return c;
}
static void free_chunk(struct iolog_compress *ic)
{
free(ic->buf);
free(ic);
}
static int z_stream_init(z_stream *stream, int gz_hdr)
{
int wbits = 15;
memset(stream, 0, sizeof(*stream));
stream->zalloc = Z_NULL;
stream->zfree = Z_NULL;
stream->opaque = Z_NULL;
stream->next_in = Z_NULL;
/*
* zlib magic - add 32 for auto-detection of gz header or not,
* if we decide to store files in a gzip friendly format.
*/
if (gz_hdr)
wbits += 32;
if (inflateInit2(stream, wbits) != Z_OK)
return 1;
return 0;
}
struct inflate_chunk_iter {
unsigned int seq;
int err;
void *buf;
size_t buf_size;
size_t buf_used;
size_t chunk_sz;
};
static void finish_chunk(z_stream *stream, FILE *f,
struct inflate_chunk_iter *iter)
{
int ret;
ret = inflateEnd(stream);
if (ret != Z_OK)
log_err("fio: failed to end log inflation seq %d (%d)\n",
iter->seq, ret);
flush_samples(f, iter->buf, iter->buf_used);
free(iter->buf);
iter->buf = NULL;
iter->buf_size = iter->buf_used = 0;
}
/*
* Iterative chunk inflation. Handles cases where we cross into a new
* sequence, doing flush finish of previous chunk if needed.
*/
static size_t inflate_chunk(struct iolog_compress *ic, int gz_hdr, FILE *f,
z_stream *stream, struct inflate_chunk_iter *iter)
{
size_t ret;
dprint(FD_COMPRESS, "inflate chunk size=%lu, seq=%u\n",
(unsigned long) ic->len, ic->seq);
if (ic->seq != iter->seq) {
if (iter->seq)
finish_chunk(stream, f, iter);
z_stream_init(stream, gz_hdr);
iter->seq = ic->seq;
}
stream->avail_in = ic->len;
stream->next_in = ic->buf;
if (!iter->buf_size) {
iter->buf_size = iter->chunk_sz;
iter->buf = malloc(iter->buf_size);
}
while (stream->avail_in) {
size_t this_out = iter->buf_size - iter->buf_used;
int err;
stream->avail_out = this_out;
stream->next_out = iter->buf + iter->buf_used;
err = inflate(stream, Z_NO_FLUSH);
if (err < 0) {
log_err("fio: failed inflating log: %d\n", err);
iter->err = err;
break;
}
iter->buf_used += this_out - stream->avail_out;
if (!stream->avail_out) {
iter->buf_size += iter->chunk_sz;
iter->buf = realloc(iter->buf, iter->buf_size);
continue;
}
if (err == Z_STREAM_END)
break;
}
ret = (void *) stream->next_in - ic->buf;
dprint(FD_COMPRESS, "inflated to size=%lu\n", (unsigned long) iter->buf_size);
return ret;
}
/*
* Inflate stored compressed chunks, or write them directly to the log
* file if so instructed.
*/
static int inflate_gz_chunks(struct io_log *log, FILE *f)
{
struct inflate_chunk_iter iter = { .chunk_sz = log->log_gz, };
z_stream stream;
while (!flist_empty(&log->chunk_list)) {
struct iolog_compress *ic;
ic = flist_first_entry(&log->chunk_list, struct iolog_compress, list);
flist_del(&ic->list);
if (log->log_gz_store) {
size_t ret;
dprint(FD_COMPRESS, "log write chunk size=%lu, "
"seq=%u\n", (unsigned long) ic->len, ic->seq);
ret = fwrite(ic->buf, ic->len, 1, f);
if (ret != 1 || ferror(f)) {
iter.err = errno;
log_err("fio: error writing compressed log\n");
}
} else
inflate_chunk(ic, log->log_gz_store, f, &stream, &iter);
free_chunk(ic);
}
if (iter.seq) {
finish_chunk(&stream, f, &iter);
free(iter.buf);
}
return iter.err;
}
/*
* Open compressed log file and decompress the stored chunks and
* write them to stdout. The chunks are stored sequentially in the
* file, so we iterate over them and do them one-by-one.
*/
int iolog_file_inflate(const char *file)
{
struct inflate_chunk_iter iter = { .chunk_sz = 64 * 1024 * 1024, };
struct iolog_compress ic;
z_stream stream;
struct stat sb;
size_t ret;
size_t total;
void *buf;
FILE *f;
f = fopen(file, "r");
if (!f) {
perror("fopen");
return 1;
}
if (stat(file, &sb) < 0) {
fclose(f);
perror("stat");
return 1;
}
ic.buf = buf = malloc(sb.st_size);
ic.len = sb.st_size;
ic.seq = 1;
ret = fread(ic.buf, ic.len, 1, f);