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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
|
/*
* builtin-diff.c
*
* Builtin diff command: Analyze two perf.data input files, look up and read
* DSOs and symbol information, sort them and produce a diff.
*/
#include "builtin.h"
#include "util/debug.h"
#include "util/event.h"
#include "util/hist.h"
#include "util/evsel.h"
#include "util/evlist.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/sort.h"
#include "util/symbol.h"
#include "util/util.h"
#include "util/data.h"
#include <stdlib.h>
#include <math.h>
/* Diff command specific HPP columns. */
enum {
PERF_HPP_DIFF__BASELINE,
PERF_HPP_DIFF__PERIOD,
PERF_HPP_DIFF__PERIOD_BASELINE,
PERF_HPP_DIFF__DELTA,
PERF_HPP_DIFF__RATIO,
PERF_HPP_DIFF__WEIGHTED_DIFF,
PERF_HPP_DIFF__FORMULA,
PERF_HPP_DIFF__MAX_INDEX
};
struct diff_hpp_fmt {
struct perf_hpp_fmt fmt;
int idx;
char *header;
int header_width;
};
struct data__file {
struct perf_session *session;
struct perf_data_file file;
int idx;
struct hists *hists;
struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
};
static struct data__file *data__files;
static int data__files_cnt;
#define data__for_each_file_start(i, d, s) \
for (i = s, d = &data__files[s]; \
i < data__files_cnt; \
i++, d = &data__files[i])
#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
static char diff__default_sort_order[] = "dso,symbol";
static bool force;
static bool show_period;
static bool show_formula;
static bool show_baseline_only;
static unsigned int sort_compute;
static s64 compute_wdiff_w1;
static s64 compute_wdiff_w2;
enum {
COMPUTE_DELTA,
COMPUTE_RATIO,
COMPUTE_WEIGHTED_DIFF,
COMPUTE_MAX,
};
const char *compute_names[COMPUTE_MAX] = {
[COMPUTE_DELTA] = "delta",
[COMPUTE_RATIO] = "ratio",
[COMPUTE_WEIGHTED_DIFF] = "wdiff",
};
static int compute;
static int compute_2_hpp[COMPUTE_MAX] = {
[COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
[COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
[COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
};
#define MAX_COL_WIDTH 70
static struct header_column {
const char *name;
int width;
} columns[PERF_HPP_DIFF__MAX_INDEX] = {
[PERF_HPP_DIFF__BASELINE] = {
.name = "Baseline",
},
[PERF_HPP_DIFF__PERIOD] = {
.name = "Period",
.width = 14,
},
[PERF_HPP_DIFF__PERIOD_BASELINE] = {
.name = "Base period",
.width = 14,
},
[PERF_HPP_DIFF__DELTA] = {
.name = "Delta",
.width = 7,
},
[PERF_HPP_DIFF__RATIO] = {
.name = "Ratio",
.width = 14,
},
[PERF_HPP_DIFF__WEIGHTED_DIFF] = {
.name = "Weighted diff",
.width = 14,
},
[PERF_HPP_DIFF__FORMULA] = {
.name = "Formula",
.width = MAX_COL_WIDTH,
}
};
static int setup_compute_opt_wdiff(char *opt)
{
char *w1_str = opt;
char *w2_str;
int ret = -EINVAL;
if (!opt)
goto out;
w2_str = strchr(opt, ',');
if (!w2_str)
goto out;
*w2_str++ = 0x0;
if (!*w2_str)
goto out;
compute_wdiff_w1 = strtol(w1_str, NULL, 10);
compute_wdiff_w2 = strtol(w2_str, NULL, 10);
if (!compute_wdiff_w1 || !compute_wdiff_w2)
goto out;
pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
compute_wdiff_w1, compute_wdiff_w2);
ret = 0;
out:
if (ret)
pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
return ret;
}
static int setup_compute_opt(char *opt)
{
if (compute == COMPUTE_WEIGHTED_DIFF)
return setup_compute_opt_wdiff(opt);
if (opt) {
pr_err("Failed: extra option specified '%s'", opt);
return -EINVAL;
}
return 0;
}
static int setup_compute(const struct option *opt, const char *str,
int unset __maybe_unused)
{
int *cp = (int *) opt->value;
char *cstr = (char *) str;
char buf[50];
unsigned i;
char *option;
if (!str) {
*cp = COMPUTE_DELTA;
return 0;
}
option = strchr(str, ':');
if (option) {
unsigned len = option++ - str;
/*
* The str data are not writeable, so we need
* to use another buffer.
*/
/* No option value is longer. */
if (len >= sizeof(buf))
return -EINVAL;
strncpy(buf, str, len);
buf[len] = 0x0;
cstr = buf;
}
for (i = 0; i < COMPUTE_MAX; i++)
if (!strcmp(cstr, compute_names[i])) {
*cp = i;
return setup_compute_opt(option);
}
pr_err("Failed: '%s' is not computation method "
"(use 'delta','ratio' or 'wdiff')\n", str);
return -EINVAL;
}
static double period_percent(struct hist_entry *he, u64 period)
{
u64 total = hists__total_period(he->hists);
return (period * 100.0) / total;
}
static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
{
double old_percent = period_percent(he, he->stat.period);
double new_percent = period_percent(pair, pair->stat.period);
pair->diff.period_ratio_delta = new_percent - old_percent;
pair->diff.computed = true;
return pair->diff.period_ratio_delta;
}
static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
{
double old_period = he->stat.period ?: 1;
double new_period = pair->stat.period;
pair->diff.computed = true;
pair->diff.period_ratio = new_period / old_period;
return pair->diff.period_ratio;
}
static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
{
u64 old_period = he->stat.period;
u64 new_period = pair->stat.period;
pair->diff.computed = true;
pair->diff.wdiff = new_period * compute_wdiff_w2 -
old_period * compute_wdiff_w1;
return pair->diff.wdiff;
}
static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
char *buf, size_t size)
{
u64 he_total = he->hists->stats.total_period;
u64 pair_total = pair->hists->stats.total_period;
if (symbol_conf.filter_relative) {
he_total = he->hists->stats.total_non_filtered_period;
pair_total = pair->hists->stats.total_non_filtered_period;
}
return scnprintf(buf, size,
"(%" PRIu64 " * 100 / %" PRIu64 ") - "
"(%" PRIu64 " * 100 / %" PRIu64 ")",
pair->stat.period, pair_total,
he->stat.period, he_total);
}
static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
char *buf, size_t size)
{
double old_period = he->stat.period;
double new_period = pair->stat.period;
return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
}
static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
char *buf, size_t size)
{
u64 old_period = he->stat.period;
u64 new_period = pair->stat.period;
return scnprintf(buf, size,
"(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
}
static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
char *buf, size_t size)
{
switch (compute) {
case COMPUTE_DELTA:
return formula_delta(he, pair, buf, size);
case COMPUTE_RATIO:
return formula_ratio(he, pair, buf, size);
case COMPUTE_WEIGHTED_DIFF:
return formula_wdiff(he, pair, buf, size);
default:
BUG_ON(1);
}
return -1;
}
static int hists__add_entry(struct hists *hists,
struct addr_location *al, u64 period,
u64 weight, u64 transaction)
{
if (__hists__add_entry(hists, al, NULL, NULL, NULL, period, weight,
transaction) != NULL)
return 0;
return -ENOMEM;
}
static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
struct addr_location al;
if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
pr_warning("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (hists__add_entry(&evsel->hists, &al, sample->period,
sample->weight, sample->transaction)) {
pr_warning("problem incrementing symbol period, skipping event\n");
return -1;
}
if (al.filtered == 0) {
evsel->hists.stats.total_non_filtered_period += sample->period;
evsel->hists.nr_non_filtered_entries++;
}
evsel->hists.stats.total_period += sample->period;
return 0;
}
static struct perf_tool tool = {
.sample = diff__process_sample_event,
.mmap = perf_event__process_mmap,
.comm = perf_event__process_comm,
.exit = perf_event__process_exit,
.fork = perf_event__process_fork,
.lost = perf_event__process_lost,
.ordered_samples = true,
.ordering_requires_timestamps = true,
};
static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
struct perf_evlist *evlist)
{
struct perf_evsel *e;
evlist__for_each(evlist, e) {
if (perf_evsel__match2(evsel, e))
return e;
}
return NULL;
}
static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
evlist__for_each(evlist, evsel) {
struct hists *hists = &evsel->hists;
hists__collapse_resort(hists, NULL);
}
}
static struct hist_entry*
get_pair_data(struct hist_entry *he, struct data__file *d)
{
if (hist_entry__has_pairs(he)) {
struct hist_entry *pair;
list_for_each_entry(pair, &he->pairs.head, pairs.node)
if (pair->hists == d->hists)
return pair;
}
return NULL;
}
static struct hist_entry*
get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
{
void *ptr = dfmt - dfmt->idx;
struct data__file *d = container_of(ptr, struct data__file, fmt);
return get_pair_data(he, d);
}
static void hists__baseline_only(struct hists *hists)
{
struct rb_root *root;
struct rb_node *next;
if (sort__need_collapse)
root = &hists->entries_collapsed;
else
root = hists->entries_in;
next = rb_first(root);
while (next != NULL) {
struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
next = rb_next(&he->rb_node_in);
if (!hist_entry__next_pair(he)) {
rb_erase(&he->rb_node_in, root);
hist_entry__free(he);
}
}
}
static void hists__precompute(struct hists *hists)
{
struct rb_root *root;
struct rb_node *next;
if (sort__need_collapse)
root = &hists->entries_collapsed;
else
root = hists->entries_in;
next = rb_first(root);
while (next != NULL) {
struct hist_entry *he, *pair;
he = rb_entry(next, struct hist_entry, rb_node_in);
next = rb_next(&he->rb_node_in);
pair = get_pair_data(he, &data__files[sort_compute]);
if (!pair)
continue;
switch (compute) {
case COMPUTE_DELTA:
compute_delta(he, pair);
break;
case COMPUTE_RATIO:
compute_ratio(he, pair);
break;
case COMPUTE_WEIGHTED_DIFF:
compute_wdiff(he, pair);
break;
default:
BUG_ON(1);
}
}
}
static int64_t cmp_doubles(double l, double r)
{
if (l > r)
return -1;
else if (l < r)
return 1;
else
return 0;
}
static int64_t
__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
int c)
{
switch (c) {
case COMPUTE_DELTA:
{
double l = left->diff.period_ratio_delta;
double r = right->diff.period_ratio_delta;
return cmp_doubles(l, r);
}
case COMPUTE_RATIO:
{
double l = left->diff.period_ratio;
double r = right->diff.period_ratio;
return cmp_doubles(l, r);
}
case COMPUTE_WEIGHTED_DIFF:
{
s64 l = left->diff.wdiff;
s64 r = right->diff.wdiff;
return r - l;
}
default:
BUG_ON(1);
}
return 0;
}
static int64_t
hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
int c)
{
bool pairs_left = hist_entry__has_pairs(left);
bool pairs_right = hist_entry__has_pairs(right);
struct hist_entry *p_right, *p_left;
if (!pairs_left && !pairs_right)
return 0;
if (!pairs_left || !pairs_right)
return pairs_left ? -1 : 1;
p_left = get_pair_data(left, &data__files[sort_compute]);
p_right = get_pair_data(right, &data__files[sort_compute]);
if (!p_left && !p_right)
return 0;
if (!p_left || !p_right)
return p_left ? -1 : 1;
/*
* We have 2 entries of same kind, let's
* make the data comparison.
*/
return __hist_entry__cmp_compute(p_left, p_right, c);
}
static void insert_hist_entry_by_compute(struct rb_root *root,
struct hist_entry *he,
int c)
{
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
struct hist_entry *iter;
while (*p != NULL) {
parent = *p;
iter = rb_entry(parent, struct hist_entry, rb_node);
if (hist_entry__cmp_compute(he, iter, c) < 0)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
rb_link_node(&he->rb_node, parent, p);
rb_insert_color(&he->rb_node, root);
}
static void hists__compute_resort(struct hists *hists)
{
struct rb_root *root;
struct rb_node *next;
if (sort__need_collapse)
root = &hists->entries_collapsed;
else
root = hists->entries_in;
hists->entries = RB_ROOT;
next = rb_first(root);
hists->nr_entries = 0;
hists->nr_non_filtered_entries = 0;
hists->stats.total_period = 0;
hists->stats.total_non_filtered_period = 0;
hists__reset_col_len(hists);
while (next != NULL) {
struct hist_entry *he;
he = rb_entry(next, struct hist_entry, rb_node_in);
next = rb_next(&he->rb_node_in);
insert_hist_entry_by_compute(&hists->entries, he, compute);
hists__inc_stats(hists, he);
if (!he->filtered)
hists__calc_col_len(hists, he);
}
}
static void hists__process(struct hists *hists)
{
if (show_baseline_only)
hists__baseline_only(hists);
if (sort_compute) {
hists__precompute(hists);
hists__compute_resort(hists);
} else {
hists__output_resort(hists);
}
hists__fprintf(hists, true, 0, 0, 0, stdout);
}
static void data__fprintf(void)
{
struct data__file *d;
int i;
fprintf(stdout, "# Data files:\n");
data__for_each_file(i, d)
fprintf(stdout, "# [%d] %s %s\n",
d->idx, d->file.path,
!d->idx ? "(Baseline)" : "");
fprintf(stdout, "#\n");
}
static void data_process(void)
{
struct perf_evlist *evlist_base = data__files[0].session->evlist;
struct perf_evsel *evsel_base;
bool first = true;
evlist__for_each(evlist_base, evsel_base) {
struct data__file *d;
int i;
data__for_each_file_new(i, d) {
struct perf_evlist *evlist = d->session->evlist;
struct perf_evsel *evsel;
evsel = evsel_match(evsel_base, evlist);
if (!evsel)
continue;
d->hists = &evsel->hists;
hists__match(&evsel_base->hists, &evsel->hists);
if (!show_baseline_only)
hists__link(&evsel_base->hists,
&evsel->hists);
}
fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
perf_evsel__name(evsel_base));
first = false;
if (verbose || data__files_cnt > 2)
data__fprintf();
hists__process(&evsel_base->hists);
}
}
static void data__free(struct data__file *d)
{
int col;
for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
struct diff_hpp_fmt *fmt = &d->fmt[col];
zfree(&fmt->header);
}
}
static int __cmd_diff(void)
{
struct data__file *d;
int ret = -EINVAL, i;
data__for_each_file(i, d) {
d->session = perf_session__new(&d->file, false, &tool);
if (!d->session) {
pr_err("Failed to open %s\n", d->file.path);
ret = -ENOMEM;
goto out_delete;
}
ret = perf_session__process_events(d->session, &tool);
if (ret) {
pr_err("Failed to process %s\n", d->file.path);
goto out_delete;
}
perf_evlist__collapse_resort(d->session->evlist);
}
data_process();
out_delete:
data__for_each_file(i, d) {
if (d->session)
perf_session__delete(d->session);
data__free(d);
}
free(data__files);
return ret;
}
static const char * const diff_usage[] = {
"perf diff [<options>] [old_file] [new_file]",
NULL,
};
static const struct option options[] = {
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
"Show only items with match in baseline"),
OPT_CALLBACK('c', "compute", &compute,
"delta,ratio,wdiff:w1,w2 (default delta)",
"Entries differential computation selection",
setup_compute),
OPT_BOOLEAN('p', "period", &show_period,
"Show period values."),
OPT_BOOLEAN('F', "formula", &show_formula,
"Show formula."),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
"load module symbols - WARNING: use only with -k and LIVE kernel"),
OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
"only consider symbols in these dsos"),
OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
"only consider symbols in these comms"),
OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
"only consider these symbols"),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
"sort by key(s): pid, comm, dso, symbol, parent"),
OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
"separator for columns, no spaces will be added between "
"columns '.' is reserved."),
OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
"Look for files with symbols relative to this directory"),
OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
"How to display percentage of filtered entries", parse_filter_percentage),
OPT_END()
};
static double baseline_percent(struct hist_entry *he)
{
u64 total = hists__total_period(he->hists);
return 100.0 * he->stat.period / total;
}
static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp, struct hist_entry *he)
{
struct diff_hpp_fmt *dfmt =
container_of(fmt, struct diff_hpp_fmt, fmt);
double percent = baseline_percent(he);
char pfmt[20] = " ";
if (!he->dummy) {
scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
return percent_color_snprintf(hpp->buf, hpp->size,
pfmt, percent);
} else
return scnprintf(hpp->buf, hpp->size, "%*s",
dfmt->header_width, pfmt);
}
static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
{
double percent = baseline_percent(he);
const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
int ret = 0;
if (!he->dummy)
ret = scnprintf(buf, size, fmt, percent);
return ret;
}
static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp, struct hist_entry *he,
int comparison_method)
{
struct diff_hpp_fmt *dfmt =
container_of(fmt, struct diff_hpp_fmt, fmt);
struct hist_entry *pair = get_pair_fmt(he, dfmt);
double diff;
s64 wdiff;
char pfmt[20] = " ";
if (!pair)
goto dummy_print;
switch (comparison_method) {
case COMPUTE_DELTA:
if (pair->diff.computed)
diff = pair->diff.period_ratio_delta;
else
diff = compute_delta(he, pair);
if (fabs(diff) < 0.01)
goto dummy_print;
scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
return percent_color_snprintf(hpp->buf, hpp->size,
pfmt, diff);
case COMPUTE_RATIO:
if (he->dummy)
goto dummy_print;
if (pair->diff.computed)
diff = pair->diff.period_ratio;
else
diff = compute_ratio(he, pair);
scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
return value_color_snprintf(hpp->buf, hpp->size,
pfmt, diff);
case COMPUTE_WEIGHTED_DIFF:
if (he->dummy)
goto dummy_print;
if (pair->diff.computed)
wdiff = pair->diff.wdiff;
else
wdiff = compute_wdiff(he, pair);
scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
return color_snprintf(hpp->buf, hpp->size,
get_percent_color(wdiff),
pfmt, wdiff);
default:
BUG_ON(1);
}
dummy_print:
return scnprintf(hpp->buf, hpp->size, "%*s",
dfmt->header_width, pfmt);
}
static int hpp__color_delta(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp, struct hist_entry *he)
{
return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
}
static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp, struct hist_entry *he)
{
return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
}
static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp, struct hist_entry *he)
{
return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
}
static void
hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
{
switch (idx) {
case PERF_HPP_DIFF__PERIOD_BASELINE:
scnprintf(buf, size, "%" PRIu64, he->stat.period);
break;
default:
break;
}
}
static void
hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
int idx, char *buf, size_t size)
{
double diff;
double ratio;
s64 wdiff;
switch (idx) {
case PERF_HPP_DIFF__DELTA:
if (pair->diff.computed)
diff = pair->diff.period_ratio_delta;
else
diff = compute_delta(he, pair);
if (fabs(diff) >= 0.01)
scnprintf(buf, size, "%+4.2F%%", diff);
break;
case PERF_HPP_DIFF__RATIO:
/* No point for ratio number if we are dummy.. */
if (he->dummy)
break;
if (pair->diff.computed)
ratio = pair->diff.period_ratio;
else
ratio = compute_ratio(he, pair);
if (ratio > 0.0)
scnprintf(buf, size, "%14.6F", ratio);
break;
case PERF_HPP_DIFF__WEIGHTED_DIFF:
/* No point for wdiff number if we are dummy.. */
if (he->dummy)
break;
if (pair->diff.computed)
wdiff = pair->diff.wdiff;
else
wdiff = compute_wdiff(he, pair);
if (wdiff != 0)
scnprintf(buf, size, "%14ld", wdiff);
break;
case PERF_HPP_DIFF__FORMULA:
formula_fprintf(he, pair, buf, size);
break;
case PERF_HPP_DIFF__PERIOD:
scnprintf(buf, size, "%" PRIu64, pair->stat.period);
break;
default:
BUG_ON(1);
};
}
static void
__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
char *buf, size_t size)
{
struct hist_entry *pair = get_pair_fmt(he, dfmt);
int idx = dfmt->idx;
/* baseline is special */
if (idx == PERF_HPP_DIFF__BASELINE)
hpp__entry_baseline(he, buf, size);
else {
if (pair)
hpp__entry_pair(he, pair, idx, buf, size);
else
hpp__entry_unpair(he, idx, buf, size);
}
}
static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
struct hist_entry *he)
{
struct diff_hpp_fmt *dfmt =
container_of(_fmt, struct diff_hpp_fmt, fmt);
char buf[MAX_COL_WIDTH] = " ";
__hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
if (symbol_conf.field_sep)
return scnprintf(hpp->buf, hpp->size, "%s", buf);
else
return scnprintf(hpp->buf, hpp->size, "%*s",
dfmt->header_width, buf);
}
static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel __maybe_unused)
{
struct diff_hpp_fmt *dfmt =
container_of(fmt, struct diff_hpp_fmt, fmt);
BUG_ON(!dfmt->header);
return scnprintf(hpp->buf, hpp->size, dfmt->header);
}
static int hpp__width(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp __maybe_unused,
struct perf_evsel *evsel __maybe_unused)
{
struct diff_hpp_fmt *dfmt =
container_of(fmt, struct diff_hpp_fmt, fmt);
BUG_ON(dfmt->header_width <= 0);
return dfmt->header_width;
}
static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
{
#define MAX_HEADER_NAME 100
char buf_indent[MAX_HEADER_NAME];
char buf[MAX_HEADER_NAME];
const char *header = NULL;
int width = 0;
BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
header = columns[dfmt->idx].name;
width = columns[dfmt->idx].width;
/* Only our defined HPP fmts should appear here. */
BUG_ON(!header);
if (data__files_cnt > 2)
scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
#define NAME (data__files_cnt > 2 ? buf : header)
dfmt->header_width = width;
width = (int) strlen(NAME);
if (dfmt->header_width < width)
dfmt->header_width = width;
scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
dfmt->header_width, NAME);
dfmt->header = strdup(buf_indent);
#undef MAX_HEADER_NAME
#undef NAME
}
static void data__hpp_register(struct data__file *d, int idx)
{
struct diff_hpp_fmt *dfmt = &d->fmt[idx];
struct perf_hpp_fmt *fmt = &dfmt->fmt;
dfmt->idx = idx;
fmt->header = hpp__header;
fmt->width = hpp__width;
fmt->entry = hpp__entry_global;
/* TODO more colors */
switch (idx) {
case PERF_HPP_DIFF__BASELINE:
fmt->color = hpp__color_baseline;
break;
case PERF_HPP_DIFF__DELTA:
fmt->color = hpp__color_delta;
break;
case PERF_HPP_DIFF__RATIO:
fmt->color = hpp__color_ratio;
break;
case PERF_HPP_DIFF__WEIGHTED_DIFF:
fmt->color = hpp__color_wdiff;
break;
default:
break;
}
init_header(d, dfmt);
perf_hpp__column_register(fmt);
}
static void ui_init(void)
{
struct data__file *d;
int i;
data__for_each_file(i, d) {
/*
* Baseline or compute realted columns:
*
* PERF_HPP_DIFF__BASELINE
* PERF_HPP_DIFF__DELTA
* PERF_HPP_DIFF__RATIO
* PERF_HPP_DIFF__WEIGHTED_DIFF
*/
data__hpp_register(d, i ? compute_2_hpp[compute] :
PERF_HPP_DIFF__BASELINE);
/*
* And the rest:
*
* PERF_HPP_DIFF__FORMULA
* PERF_HPP_DIFF__PERIOD
* PERF_HPP_DIFF__PERIOD_BASELINE
*/
if (show_formula && i)
data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
if (show_period)
data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
PERF_HPP_DIFF__PERIOD_BASELINE);
}
}
static int data_init(int argc, const char **argv)
{
struct data__file *d;
static const char *defaults[] = {
"perf.data.old",
"perf.data",
};
bool use_default = true;
int i;
data__files_cnt = 2;
if (argc) {
if (argc == 1)
defaults[1] = argv[0];
else {
data__files_cnt = argc;
use_default = false;
}
} else if (perf_guest) {
defaults[0] = "perf.data.host";
defaults[1] = "perf.data.guest";
}
if (sort_compute >= (unsigned int) data__files_cnt) {
pr_err("Order option out of limit.\n");
return -EINVAL;
}
data__files = zalloc(sizeof(*data__files) * data__files_cnt);
if (!data__files)
return -ENOMEM;
data__for_each_file(i, d) {
struct perf_data_file *file = &d->file;
file->path = use_default ? defaults[i] : argv[i];
file->mode = PERF_DATA_MODE_READ,
file->force = force,
d->idx = i;
}
return 0;
}
int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
{
perf_config(perf_default_config, NULL);
sort_order = diff__default_sort_order;
argc = parse_options(argc, argv, options, diff_usage, 0);
if (symbol__init() < 0)
return -1;
if (data_init(argc, argv) < 0)
return -1;
ui_init();
if (setup_sorting() < 0)
usage_with_options(diff_usage, options);
setup_pager();
sort__setup_elide(NULL);
return __cmd_diff();
}
|