projects/linux·blob v4.13 · refs

1362 lines · 31.0 KiB

1/*
2 * builtin-diff.c
3 *
4 * Builtin diff command: Analyze two perf.data input files, look up and read
5 * DSOs and symbol information, sort them and produce a diff.
6 */
7#include "builtin.h"
8
9#include "util/debug.h"
10#include "util/event.h"
11#include "util/hist.h"
12#include "util/evsel.h"
13#include "util/evlist.h"
14#include "util/session.h"
15#include "util/tool.h"
16#include "util/sort.h"
17#include "util/symbol.h"
18#include "util/util.h"
19#include "util/data.h"
20#include "util/config.h"
21
22#include <errno.h>
23#include <inttypes.h>
24#include <stdlib.h>
25#include <math.h>
26
27/* Diff command specific HPP columns. */
28enum {
29 PERF_HPP_DIFF__BASELINE,
30 PERF_HPP_DIFF__PERIOD,
31 PERF_HPP_DIFF__PERIOD_BASELINE,
32 PERF_HPP_DIFF__DELTA,
33 PERF_HPP_DIFF__RATIO,
34 PERF_HPP_DIFF__WEIGHTED_DIFF,
35 PERF_HPP_DIFF__FORMULA,
36 PERF_HPP_DIFF__DELTA_ABS,
37
38 PERF_HPP_DIFF__MAX_INDEX
39};
40
41struct diff_hpp_fmt {
42 struct perf_hpp_fmt fmt;
43 int idx;
44 char *header;
45 int header_width;
46};
47
48struct data__file {
49 struct perf_session *session;
50 struct perf_data_file file;
51 int idx;
52 struct hists *hists;
53 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
54};
55
56static struct data__file *data__files;
57static int data__files_cnt;
58
59#define data__for_each_file_start(i, d, s) \
60 for (i = s, d = &data__files[s]; \
61 i < data__files_cnt; \
62 i++, d = &data__files[i])
63
64#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
65#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
66
67static bool force;
68static bool show_period;
69static bool show_formula;
70static bool show_baseline_only;
71static unsigned int sort_compute = 1;
72
73static s64 compute_wdiff_w1;
74static s64 compute_wdiff_w2;
75
76enum {
77 COMPUTE_DELTA,
78 COMPUTE_RATIO,
79 COMPUTE_WEIGHTED_DIFF,
80 COMPUTE_DELTA_ABS,
81 COMPUTE_MAX,
82};
83
84const char *compute_names[COMPUTE_MAX] = {
85 [COMPUTE_DELTA] = "delta",
86 [COMPUTE_DELTA_ABS] = "delta-abs",
87 [COMPUTE_RATIO] = "ratio",
88 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
89};
90
91static int compute = COMPUTE_DELTA_ABS;
92
93static int compute_2_hpp[COMPUTE_MAX] = {
94 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
95 [COMPUTE_DELTA_ABS] = PERF_HPP_DIFF__DELTA_ABS,
96 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
97 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
98};
99
100#define MAX_COL_WIDTH 70
101
102static struct header_column {
103 const char *name;
104 int width;
105} columns[PERF_HPP_DIFF__MAX_INDEX] = {
106 [PERF_HPP_DIFF__BASELINE] = {
107 .name = "Baseline",
108 },
109 [PERF_HPP_DIFF__PERIOD] = {
110 .name = "Period",
111 .width = 14,
112 },
113 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
114 .name = "Base period",
115 .width = 14,
116 },
117 [PERF_HPP_DIFF__DELTA] = {
118 .name = "Delta",
119 .width = 7,
120 },
121 [PERF_HPP_DIFF__DELTA_ABS] = {
122 .name = "Delta Abs",
123 .width = 7,
124 },
125 [PERF_HPP_DIFF__RATIO] = {
126 .name = "Ratio",
127 .width = 14,
128 },
129 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
130 .name = "Weighted diff",
131 .width = 14,
132 },
133 [PERF_HPP_DIFF__FORMULA] = {
134 .name = "Formula",
135 .width = MAX_COL_WIDTH,
136 }
137};
138
139static int setup_compute_opt_wdiff(char *opt)
140{
141 char *w1_str = opt;
142 char *w2_str;
143
144 int ret = -EINVAL;
145
146 if (!opt)
147 goto out;
148
149 w2_str = strchr(opt, ',');
150 if (!w2_str)
151 goto out;
152
153 *w2_str++ = 0x0;
154 if (!*w2_str)
155 goto out;
156
157 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
158 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
159
160 if (!compute_wdiff_w1 || !compute_wdiff_w2)
161 goto out;
162
163 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
164 compute_wdiff_w1, compute_wdiff_w2);
165
166 ret = 0;
167
168 out:
169 if (ret)
170 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
171
172 return ret;
173}
174
175static int setup_compute_opt(char *opt)
176{
177 if (compute == COMPUTE_WEIGHTED_DIFF)
178 return setup_compute_opt_wdiff(opt);
179
180 if (opt) {
181 pr_err("Failed: extra option specified '%s'", opt);
182 return -EINVAL;
183 }
184
185 return 0;
186}
187
188static int setup_compute(const struct option *opt, const char *str,
189 int unset __maybe_unused)
190{
191 int *cp = (int *) opt->value;
192 char *cstr = (char *) str;
193 char buf[50];
194 unsigned i;
195 char *option;
196
197 if (!str) {
198 *cp = COMPUTE_DELTA;
199 return 0;
200 }
201
202 option = strchr(str, ':');
203 if (option) {
204 unsigned len = option++ - str;
205
206 /*
207 * The str data are not writeable, so we need
208 * to use another buffer.
209 */
210
211 /* No option value is longer. */
212 if (len >= sizeof(buf))
213 return -EINVAL;
214
215 strncpy(buf, str, len);
216 buf[len] = 0x0;
217 cstr = buf;
218 }
219
220 for (i = 0; i < COMPUTE_MAX; i++)
221 if (!strcmp(cstr, compute_names[i])) {
222 *cp = i;
223 return setup_compute_opt(option);
224 }
225
226 pr_err("Failed: '%s' is not computation method "
227 "(use 'delta','ratio' or 'wdiff')\n", str);
228 return -EINVAL;
229}
230
231static double period_percent(struct hist_entry *he, u64 period)
232{
233 u64 total = hists__total_period(he->hists);
234
235 return (period * 100.0) / total;
236}
237
238static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
239{
240 double old_percent = period_percent(he, he->stat.period);
241 double new_percent = period_percent(pair, pair->stat.period);
242
243 pair->diff.period_ratio_delta = new_percent - old_percent;
244 pair->diff.computed = true;
245 return pair->diff.period_ratio_delta;
246}
247
248static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
249{
250 double old_period = he->stat.period ?: 1;
251 double new_period = pair->stat.period;
252
253 pair->diff.computed = true;
254 pair->diff.period_ratio = new_period / old_period;
255 return pair->diff.period_ratio;
256}
257
258static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
259{
260 u64 old_period = he->stat.period;
261 u64 new_period = pair->stat.period;
262
263 pair->diff.computed = true;
264 pair->diff.wdiff = new_period * compute_wdiff_w2 -
265 old_period * compute_wdiff_w1;
266
267 return pair->diff.wdiff;
268}
269
270static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
271 char *buf, size_t size)
272{
273 u64 he_total = he->hists->stats.total_period;
274 u64 pair_total = pair->hists->stats.total_period;
275
276 if (symbol_conf.filter_relative) {
277 he_total = he->hists->stats.total_non_filtered_period;
278 pair_total = pair->hists->stats.total_non_filtered_period;
279 }
280 return scnprintf(buf, size,
281 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
282 "(%" PRIu64 " * 100 / %" PRIu64 ")",
283 pair->stat.period, pair_total,
284 he->stat.period, he_total);
285}
286
287static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
288 char *buf, size_t size)
289{
290 double old_period = he->stat.period;
291 double new_period = pair->stat.period;
292
293 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
294}
295
296static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
297 char *buf, size_t size)
298{
299 u64 old_period = he->stat.period;
300 u64 new_period = pair->stat.period;
301
302 return scnprintf(buf, size,
303 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
304 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
305}
306
307static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
308 char *buf, size_t size)
309{
310 switch (compute) {
311 case COMPUTE_DELTA:
312 case COMPUTE_DELTA_ABS:
313 return formula_delta(he, pair, buf, size);
314 case COMPUTE_RATIO:
315 return formula_ratio(he, pair, buf, size);
316 case COMPUTE_WEIGHTED_DIFF:
317 return formula_wdiff(he, pair, buf, size);
318 default:
319 BUG_ON(1);
320 }
321
322 return -1;
323}
324
325static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
326 union perf_event *event,
327 struct perf_sample *sample,
328 struct perf_evsel *evsel,
329 struct machine *machine)
330{
331 struct addr_location al;
332 struct hists *hists = evsel__hists(evsel);
333 int ret = -1;
334
335 if (machine__resolve(machine, &al, sample) < 0) {
336 pr_warning("problem processing %d event, skipping it.\n",
337 event->header.type);
338 return -1;
339 }
340
341 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample, true)) {
342 pr_warning("problem incrementing symbol period, skipping event\n");
343 goto out_put;
344 }
345
346 /*
347 * The total_period is updated here before going to the output
348 * tree since normally only the baseline hists will call
349 * hists__output_resort() and precompute needs the total
350 * period in order to sort entries by percentage delta.
351 */
352 hists->stats.total_period += sample->period;
353 if (!al.filtered)
354 hists->stats.total_non_filtered_period += sample->period;
355 ret = 0;
356out_put:
357 addr_location__put(&al);
358 return ret;
359}
360
361static struct perf_tool tool = {
362 .sample = diff__process_sample_event,
363 .mmap = perf_event__process_mmap,
364 .mmap2 = perf_event__process_mmap2,
365 .comm = perf_event__process_comm,
366 .exit = perf_event__process_exit,
367 .fork = perf_event__process_fork,
368 .lost = perf_event__process_lost,
369 .namespaces = perf_event__process_namespaces,
370 .ordered_events = true,
371 .ordering_requires_timestamps = true,
372};
373
374static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
375 struct perf_evlist *evlist)
376{
377 struct perf_evsel *e;
378
379 evlist__for_each_entry(evlist, e) {
380 if (perf_evsel__match2(evsel, e))
381 return e;
382 }
383
384 return NULL;
385}
386
387static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
388{
389 struct perf_evsel *evsel;
390
391 evlist__for_each_entry(evlist, evsel) {
392 struct hists *hists = evsel__hists(evsel);
393
394 hists__collapse_resort(hists, NULL);
395 }
396}
397
398static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
399{
400 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
401 void *ptr = dfmt - dfmt->idx;
402 struct data__file *d = container_of(ptr, struct data__file, fmt);
403
404 return d;
405}
406
407static struct hist_entry*
408get_pair_data(struct hist_entry *he, struct data__file *d)
409{
410 if (hist_entry__has_pairs(he)) {
411 struct hist_entry *pair;
412
413 list_for_each_entry(pair, &he->pairs.head, pairs.node)
414 if (pair->hists == d->hists)
415 return pair;
416 }
417
418 return NULL;
419}
420
421static struct hist_entry*
422get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
423{
424 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
425
426 return get_pair_data(he, d);
427}
428
429static void hists__baseline_only(struct hists *hists)
430{
431 struct rb_root *root;
432 struct rb_node *next;
433
434 if (hists__has(hists, need_collapse))
435 root = &hists->entries_collapsed;
436 else
437 root = hists->entries_in;
438
439 next = rb_first(root);
440 while (next != NULL) {
441 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
442
443 next = rb_next(&he->rb_node_in);
444 if (!hist_entry__next_pair(he)) {
445 rb_erase(&he->rb_node_in, root);
446 hist_entry__delete(he);
447 }
448 }
449}
450
451static void hists__precompute(struct hists *hists)
452{
453 struct rb_root *root;
454 struct rb_node *next;
455
456 if (hists__has(hists, need_collapse))
457 root = &hists->entries_collapsed;
458 else
459 root = hists->entries_in;
460
461 next = rb_first(root);
462 while (next != NULL) {
463 struct hist_entry *he, *pair;
464 struct data__file *d;
465 int i;
466
467 he = rb_entry(next, struct hist_entry, rb_node_in);
468 next = rb_next(&he->rb_node_in);
469
470 data__for_each_file_new(i, d) {
471 pair = get_pair_data(he, d);
472 if (!pair)
473 continue;
474
475 switch (compute) {
476 case COMPUTE_DELTA:
477 case COMPUTE_DELTA_ABS:
478 compute_delta(he, pair);
479 break;
480 case COMPUTE_RATIO:
481 compute_ratio(he, pair);
482 break;
483 case COMPUTE_WEIGHTED_DIFF:
484 compute_wdiff(he, pair);
485 break;
486 default:
487 BUG_ON(1);
488 }
489 }
490 }
491}
492
493static int64_t cmp_doubles(double l, double r)
494{
495 if (l > r)
496 return -1;
497 else if (l < r)
498 return 1;
499 else
500 return 0;
501}
502
503static int64_t
504__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
505 int c)
506{
507 switch (c) {
508 case COMPUTE_DELTA:
509 {
510 double l = left->diff.period_ratio_delta;
511 double r = right->diff.period_ratio_delta;
512
513 return cmp_doubles(l, r);
514 }
515 case COMPUTE_DELTA_ABS:
516 {
517 double l = fabs(left->diff.period_ratio_delta);
518 double r = fabs(right->diff.period_ratio_delta);
519
520 return cmp_doubles(l, r);
521 }
522 case COMPUTE_RATIO:
523 {
524 double l = left->diff.period_ratio;
525 double r = right->diff.period_ratio;
526
527 return cmp_doubles(l, r);
528 }
529 case COMPUTE_WEIGHTED_DIFF:
530 {
531 s64 l = left->diff.wdiff;
532 s64 r = right->diff.wdiff;
533
534 return r - l;
535 }
536 default:
537 BUG_ON(1);
538 }
539
540 return 0;
541}
542
543static int64_t
544hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
545 int c, int sort_idx)
546{
547 bool pairs_left = hist_entry__has_pairs(left);
548 bool pairs_right = hist_entry__has_pairs(right);
549 struct hist_entry *p_right, *p_left;
550
551 if (!pairs_left && !pairs_right)
552 return 0;
553
554 if (!pairs_left || !pairs_right)
555 return pairs_left ? -1 : 1;
556
557 p_left = get_pair_data(left, &data__files[sort_idx]);
558 p_right = get_pair_data(right, &data__files[sort_idx]);
559
560 if (!p_left && !p_right)
561 return 0;
562
563 if (!p_left || !p_right)
564 return p_left ? -1 : 1;
565
566 /*
567 * We have 2 entries of same kind, let's
568 * make the data comparison.
569 */
570 return __hist_entry__cmp_compute(p_left, p_right, c);
571}
572
573static int64_t
574hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
575 int c, int sort_idx)
576{
577 struct hist_entry *p_right, *p_left;
578
579 p_left = get_pair_data(left, &data__files[sort_idx]);
580 p_right = get_pair_data(right, &data__files[sort_idx]);
581
582 if (!p_left && !p_right)
583 return 0;
584
585 if (!p_left || !p_right)
586 return p_left ? -1 : 1;
587
588 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
589 /*
590 * The delta can be computed without the baseline, but
591 * others are not. Put those entries which have no
592 * values below.
593 */
594 if (left->dummy && right->dummy)
595 return 0;
596
597 if (left->dummy || right->dummy)
598 return left->dummy ? 1 : -1;
599 }
600
601 return __hist_entry__cmp_compute(p_left, p_right, c);
602}
603
604static int64_t
605hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
606 struct hist_entry *left __maybe_unused,
607 struct hist_entry *right __maybe_unused)
608{
609 return 0;
610}
611
612static int64_t
613hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
614 struct hist_entry *left, struct hist_entry *right)
615{
616 if (left->stat.period == right->stat.period)
617 return 0;
618 return left->stat.period > right->stat.period ? 1 : -1;
619}
620
621static int64_t
622hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
623 struct hist_entry *left, struct hist_entry *right)
624{
625 struct data__file *d = fmt_to_data_file(fmt);
626
627 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
628}
629
630static int64_t
631hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
632 struct hist_entry *left, struct hist_entry *right)
633{
634 struct data__file *d = fmt_to_data_file(fmt);
635
636 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
637}
638
639static int64_t
640hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
641 struct hist_entry *left, struct hist_entry *right)
642{
643 struct data__file *d = fmt_to_data_file(fmt);
644
645 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
646}
647
648static int64_t
649hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
650 struct hist_entry *left, struct hist_entry *right)
651{
652 struct data__file *d = fmt_to_data_file(fmt);
653
654 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
655}
656
657static int64_t
658hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
659 struct hist_entry *left, struct hist_entry *right)
660{
661 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
662 sort_compute);
663}
664
665static int64_t
666hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
667 struct hist_entry *left, struct hist_entry *right)
668{
669 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
670 sort_compute);
671}
672
673static int64_t
674hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
675 struct hist_entry *left, struct hist_entry *right)
676{
677 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
678 sort_compute);
679}
680
681static int64_t
682hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
683 struct hist_entry *left, struct hist_entry *right)
684{
685 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
686 sort_compute);
687}
688
689static void hists__process(struct hists *hists)
690{
691 if (show_baseline_only)
692 hists__baseline_only(hists);
693
694 hists__precompute(hists);
695 hists__output_resort(hists, NULL);
696
697 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
698 symbol_conf.use_callchain);
699}
700
701static void data__fprintf(void)
702{
703 struct data__file *d;
704 int i;
705
706 fprintf(stdout, "# Data files:\n");
707
708 data__for_each_file(i, d)
709 fprintf(stdout, "# [%d] %s %s\n",
710 d->idx, d->file.path,
711 !d->idx ? "(Baseline)" : "");
712
713 fprintf(stdout, "#\n");
714}
715
716static void data_process(void)
717{
718 struct perf_evlist *evlist_base = data__files[0].session->evlist;
719 struct perf_evsel *evsel_base;
720 bool first = true;
721
722 evlist__for_each_entry(evlist_base, evsel_base) {
723 struct hists *hists_base = evsel__hists(evsel_base);
724 struct data__file *d;
725 int i;
726
727 data__for_each_file_new(i, d) {
728 struct perf_evlist *evlist = d->session->evlist;
729 struct perf_evsel *evsel;
730 struct hists *hists;
731
732 evsel = evsel_match(evsel_base, evlist);
733 if (!evsel)
734 continue;
735
736 hists = evsel__hists(evsel);
737 d->hists = hists;
738
739 hists__match(hists_base, hists);
740
741 if (!show_baseline_only)
742 hists__link(hists_base, hists);
743 }
744
745 if (!quiet) {
746 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
747 perf_evsel__name(evsel_base));
748 }
749
750 first = false;
751
752 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
753 data__fprintf();
754
755 /* Don't sort callchain for perf diff */
756 perf_evsel__reset_sample_bit(evsel_base, CALLCHAIN);
757
758 hists__process(hists_base);
759 }
760}
761
762static void data__free(struct data__file *d)
763{
764 int col;
765
766 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
767 struct diff_hpp_fmt *fmt = &d->fmt[col];
768
769 zfree(&fmt->header);
770 }
771}
772
773static int __cmd_diff(void)
774{
775 struct data__file *d;
776 int ret = -EINVAL, i;
777
778 data__for_each_file(i, d) {
779 d->session = perf_session__new(&d->file, false, &tool);
780 if (!d->session) {
781 pr_err("Failed to open %s\n", d->file.path);
782 ret = -1;
783 goto out_delete;
784 }
785
786 ret = perf_session__process_events(d->session);
787 if (ret) {
788 pr_err("Failed to process %s\n", d->file.path);
789 goto out_delete;
790 }
791
792 perf_evlist__collapse_resort(d->session->evlist);
793 }
794
795 data_process();
796
797 out_delete:
798 data__for_each_file(i, d) {
799 perf_session__delete(d->session);
800 data__free(d);
801 }
802
803 free(data__files);
804 return ret;
805}
806
807static const char * const diff_usage[] = {
808 "perf diff [<options>] [old_file] [new_file]",
809 NULL,
810};
811
812static const struct option options[] = {
813 OPT_INCR('v', "verbose", &verbose,
814 "be more verbose (show symbol address, etc)"),
815 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
816 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
817 "Show only items with match in baseline"),
818 OPT_CALLBACK('c', "compute", &compute,
819 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs)",
820 "Entries differential computation selection",
821 setup_compute),
822 OPT_BOOLEAN('p', "period", &show_period,
823 "Show period values."),
824 OPT_BOOLEAN('F', "formula", &show_formula,
825 "Show formula."),
826 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
827 "dump raw trace in ASCII"),
828 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
829 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
830 "file", "kallsyms pathname"),
831 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
832 "load module symbols - WARNING: use only with -k and LIVE kernel"),
833 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
834 "only consider symbols in these dsos"),
835 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
836 "only consider symbols in these comms"),
837 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
838 "only consider these symbols"),
839 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
840 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
841 " Please refer the man page for the complete list."),
842 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
843 "separator for columns, no spaces will be added between "
844 "columns '.' is reserved."),
845 OPT_CALLBACK(0, "symfs", NULL, "directory",
846 "Look for files with symbols relative to this directory",
847 symbol__config_symfs),
848 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
849 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
850 "How to display percentage of filtered entries", parse_filter_percentage),
851 OPT_END()
852};
853
854static double baseline_percent(struct hist_entry *he)
855{
856 u64 total = hists__total_period(he->hists);
857
858 return 100.0 * he->stat.period / total;
859}
860
861static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
862 struct perf_hpp *hpp, struct hist_entry *he)
863{
864 struct diff_hpp_fmt *dfmt =
865 container_of(fmt, struct diff_hpp_fmt, fmt);
866 double percent = baseline_percent(he);
867 char pfmt[20] = " ";
868
869 if (!he->dummy) {
870 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
871 return percent_color_snprintf(hpp->buf, hpp->size,
872 pfmt, percent);
873 } else
874 return scnprintf(hpp->buf, hpp->size, "%*s",
875 dfmt->header_width, pfmt);
876}
877
878static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
879{
880 double percent = baseline_percent(he);
881 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
882 int ret = 0;
883
884 if (!he->dummy)
885 ret = scnprintf(buf, size, fmt, percent);
886
887 return ret;
888}
889
890static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
891 struct perf_hpp *hpp, struct hist_entry *he,
892 int comparison_method)
893{
894 struct diff_hpp_fmt *dfmt =
895 container_of(fmt, struct diff_hpp_fmt, fmt);
896 struct hist_entry *pair = get_pair_fmt(he, dfmt);
897 double diff;
898 s64 wdiff;
899 char pfmt[20] = " ";
900
901 if (!pair)
902 goto no_print;
903
904 switch (comparison_method) {
905 case COMPUTE_DELTA:
906 if (pair->diff.computed)
907 diff = pair->diff.period_ratio_delta;
908 else
909 diff = compute_delta(he, pair);
910
911 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
912 return percent_color_snprintf(hpp->buf, hpp->size,
913 pfmt, diff);
914 case COMPUTE_RATIO:
915 if (he->dummy)
916 goto dummy_print;
917 if (pair->diff.computed)
918 diff = pair->diff.period_ratio;
919 else
920 diff = compute_ratio(he, pair);
921
922 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
923 return value_color_snprintf(hpp->buf, hpp->size,
924 pfmt, diff);
925 case COMPUTE_WEIGHTED_DIFF:
926 if (he->dummy)
927 goto dummy_print;
928 if (pair->diff.computed)
929 wdiff = pair->diff.wdiff;
930 else
931 wdiff = compute_wdiff(he, pair);
932
933 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
934 return color_snprintf(hpp->buf, hpp->size,
935 get_percent_color(wdiff),
936 pfmt, wdiff);
937 default:
938 BUG_ON(1);
939 }
940dummy_print:
941 return scnprintf(hpp->buf, hpp->size, "%*s",
942 dfmt->header_width, "N/A");
943no_print:
944 return scnprintf(hpp->buf, hpp->size, "%*s",
945 dfmt->header_width, pfmt);
946}
947
948static int hpp__color_delta(struct perf_hpp_fmt *fmt,
949 struct perf_hpp *hpp, struct hist_entry *he)
950{
951 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
952}
953
954static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
955 struct perf_hpp *hpp, struct hist_entry *he)
956{
957 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
958}
959
960static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
961 struct perf_hpp *hpp, struct hist_entry *he)
962{
963 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
964}
965
966static void
967hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
968{
969 switch (idx) {
970 case PERF_HPP_DIFF__PERIOD_BASELINE:
971 scnprintf(buf, size, "%" PRIu64, he->stat.period);
972 break;
973
974 default:
975 break;
976 }
977}
978
979static void
980hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
981 int idx, char *buf, size_t size)
982{
983 double diff;
984 double ratio;
985 s64 wdiff;
986
987 switch (idx) {
988 case PERF_HPP_DIFF__DELTA:
989 case PERF_HPP_DIFF__DELTA_ABS:
990 if (pair->diff.computed)
991 diff = pair->diff.period_ratio_delta;
992 else
993 diff = compute_delta(he, pair);
994
995 scnprintf(buf, size, "%+4.2F%%", diff);
996 break;
997
998 case PERF_HPP_DIFF__RATIO:
999 /* No point for ratio number if we are dummy.. */
1000 if (he->dummy) {
1001 scnprintf(buf, size, "N/A");
1002 break;
1003 }
1004
1005 if (pair->diff.computed)
1006 ratio = pair->diff.period_ratio;
1007 else
1008 ratio = compute_ratio(he, pair);
1009
1010 if (ratio > 0.0)
1011 scnprintf(buf, size, "%14.6F", ratio);
1012 break;
1013
1014 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1015 /* No point for wdiff number if we are dummy.. */
1016 if (he->dummy) {
1017 scnprintf(buf, size, "N/A");
1018 break;
1019 }
1020
1021 if (pair->diff.computed)
1022 wdiff = pair->diff.wdiff;
1023 else
1024 wdiff = compute_wdiff(he, pair);
1025
1026 if (wdiff != 0)
1027 scnprintf(buf, size, "%14ld", wdiff);
1028 break;
1029
1030 case PERF_HPP_DIFF__FORMULA:
1031 formula_fprintf(he, pair, buf, size);
1032 break;
1033
1034 case PERF_HPP_DIFF__PERIOD:
1035 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1036 break;
1037
1038 default:
1039 BUG_ON(1);
1040 };
1041}
1042
1043static void
1044__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1045 char *buf, size_t size)
1046{
1047 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1048 int idx = dfmt->idx;
1049
1050 /* baseline is special */
1051 if (idx == PERF_HPP_DIFF__BASELINE)
1052 hpp__entry_baseline(he, buf, size);
1053 else {
1054 if (pair)
1055 hpp__entry_pair(he, pair, idx, buf, size);
1056 else
1057 hpp__entry_unpair(he, idx, buf, size);
1058 }
1059}
1060
1061static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1062 struct hist_entry *he)
1063{
1064 struct diff_hpp_fmt *dfmt =
1065 container_of(_fmt, struct diff_hpp_fmt, fmt);
1066 char buf[MAX_COL_WIDTH] = " ";
1067
1068 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1069
1070 if (symbol_conf.field_sep)
1071 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1072 else
1073 return scnprintf(hpp->buf, hpp->size, "%*s",
1074 dfmt->header_width, buf);
1075}
1076
1077static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1078 struct hists *hists __maybe_unused,
1079 int line __maybe_unused,
1080 int *span __maybe_unused)
1081{
1082 struct diff_hpp_fmt *dfmt =
1083 container_of(fmt, struct diff_hpp_fmt, fmt);
1084
1085 BUG_ON(!dfmt->header);
1086 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1087}
1088
1089static int hpp__width(struct perf_hpp_fmt *fmt,
1090 struct perf_hpp *hpp __maybe_unused,
1091 struct hists *hists __maybe_unused)
1092{
1093 struct diff_hpp_fmt *dfmt =
1094 container_of(fmt, struct diff_hpp_fmt, fmt);
1095
1096 BUG_ON(dfmt->header_width <= 0);
1097 return dfmt->header_width;
1098}
1099
1100static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1101{
1102#define MAX_HEADER_NAME 100
1103 char buf_indent[MAX_HEADER_NAME];
1104 char buf[MAX_HEADER_NAME];
1105 const char *header = NULL;
1106 int width = 0;
1107
1108 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1109 header = columns[dfmt->idx].name;
1110 width = columns[dfmt->idx].width;
1111
1112 /* Only our defined HPP fmts should appear here. */
1113 BUG_ON(!header);
1114
1115 if (data__files_cnt > 2)
1116 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1117
1118#define NAME (data__files_cnt > 2 ? buf : header)
1119 dfmt->header_width = width;
1120 width = (int) strlen(NAME);
1121 if (dfmt->header_width < width)
1122 dfmt->header_width = width;
1123
1124 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1125 dfmt->header_width, NAME);
1126
1127 dfmt->header = strdup(buf_indent);
1128#undef MAX_HEADER_NAME
1129#undef NAME
1130}
1131
1132static void data__hpp_register(struct data__file *d, int idx)
1133{
1134 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1135 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1136
1137 dfmt->idx = idx;
1138
1139 fmt->header = hpp__header;
1140 fmt->width = hpp__width;
1141 fmt->entry = hpp__entry_global;
1142 fmt->cmp = hist_entry__cmp_nop;
1143 fmt->collapse = hist_entry__cmp_nop;
1144
1145 /* TODO more colors */
1146 switch (idx) {
1147 case PERF_HPP_DIFF__BASELINE:
1148 fmt->color = hpp__color_baseline;
1149 fmt->sort = hist_entry__cmp_baseline;
1150 break;
1151 case PERF_HPP_DIFF__DELTA:
1152 fmt->color = hpp__color_delta;
1153 fmt->sort = hist_entry__cmp_delta;
1154 break;
1155 case PERF_HPP_DIFF__RATIO:
1156 fmt->color = hpp__color_ratio;
1157 fmt->sort = hist_entry__cmp_ratio;
1158 break;
1159 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1160 fmt->color = hpp__color_wdiff;
1161 fmt->sort = hist_entry__cmp_wdiff;
1162 break;
1163 case PERF_HPP_DIFF__DELTA_ABS:
1164 fmt->color = hpp__color_delta;
1165 fmt->sort = hist_entry__cmp_delta_abs;
1166 break;
1167 default:
1168 fmt->sort = hist_entry__cmp_nop;
1169 break;
1170 }
1171
1172 init_header(d, dfmt);
1173 perf_hpp__column_register(fmt);
1174 perf_hpp__register_sort_field(fmt);
1175}
1176
1177static int ui_init(void)
1178{
1179 struct data__file *d;
1180 struct perf_hpp_fmt *fmt;
1181 int i;
1182
1183 data__for_each_file(i, d) {
1184
1185 /*
1186 * Baseline or compute realted columns:
1187 *
1188 * PERF_HPP_DIFF__BASELINE
1189 * PERF_HPP_DIFF__DELTA
1190 * PERF_HPP_DIFF__RATIO
1191 * PERF_HPP_DIFF__WEIGHTED_DIFF
1192 */
1193 data__hpp_register(d, i ? compute_2_hpp[compute] :
1194 PERF_HPP_DIFF__BASELINE);
1195
1196 /*
1197 * And the rest:
1198 *
1199 * PERF_HPP_DIFF__FORMULA
1200 * PERF_HPP_DIFF__PERIOD
1201 * PERF_HPP_DIFF__PERIOD_BASELINE
1202 */
1203 if (show_formula && i)
1204 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1205
1206 if (show_period)
1207 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1208 PERF_HPP_DIFF__PERIOD_BASELINE);
1209 }
1210
1211 if (!sort_compute)
1212 return 0;
1213
1214 /*
1215 * Prepend an fmt to sort on columns at 'sort_compute' first.
1216 * This fmt is added only to the sort list but not to the
1217 * output fields list.
1218 *
1219 * Note that this column (data) can be compared twice - one
1220 * for this 'sort_compute' fmt and another for the normal
1221 * diff_hpp_fmt. But it shouldn't a problem as most entries
1222 * will be sorted out by first try or baseline and comparing
1223 * is not a costly operation.
1224 */
1225 fmt = zalloc(sizeof(*fmt));
1226 if (fmt == NULL) {
1227 pr_err("Memory allocation failed\n");
1228 return -1;
1229 }
1230
1231 fmt->cmp = hist_entry__cmp_nop;
1232 fmt->collapse = hist_entry__cmp_nop;
1233
1234 switch (compute) {
1235 case COMPUTE_DELTA:
1236 fmt->sort = hist_entry__cmp_delta_idx;
1237 break;
1238 case COMPUTE_RATIO:
1239 fmt->sort = hist_entry__cmp_ratio_idx;
1240 break;
1241 case COMPUTE_WEIGHTED_DIFF:
1242 fmt->sort = hist_entry__cmp_wdiff_idx;
1243 break;
1244 case COMPUTE_DELTA_ABS:
1245 fmt->sort = hist_entry__cmp_delta_abs_idx;
1246 break;
1247 default:
1248 BUG_ON(1);
1249 }
1250
1251 perf_hpp__prepend_sort_field(fmt);
1252 return 0;
1253}
1254
1255static int data_init(int argc, const char **argv)
1256{
1257 struct data__file *d;
1258 static const char *defaults[] = {
1259 "perf.data.old",
1260 "perf.data",
1261 };
1262 bool use_default = true;
1263 int i;
1264
1265 data__files_cnt = 2;
1266
1267 if (argc) {
1268 if (argc == 1)
1269 defaults[1] = argv[0];
1270 else {
1271 data__files_cnt = argc;
1272 use_default = false;
1273 }
1274 } else if (perf_guest) {
1275 defaults[0] = "perf.data.host";
1276 defaults[1] = "perf.data.guest";
1277 }
1278
1279 if (sort_compute >= (unsigned int) data__files_cnt) {
1280 pr_err("Order option out of limit.\n");
1281 return -EINVAL;
1282 }
1283
1284 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1285 if (!data__files)
1286 return -ENOMEM;
1287
1288 data__for_each_file(i, d) {
1289 struct perf_data_file *file = &d->file;
1290
1291 file->path = use_default ? defaults[i] : argv[i];
1292 file->mode = PERF_DATA_MODE_READ,
1293 file->force = force,
1294
1295 d->idx = i;
1296 }
1297
1298 return 0;
1299}
1300
1301static int diff__config(const char *var, const char *value,
1302 void *cb __maybe_unused)
1303{
1304 if (!strcmp(var, "diff.order")) {
1305 int ret;
1306 if (perf_config_int(&ret, var, value) < 0)
1307 return -1;
1308 sort_compute = ret;
1309 return 0;
1310 }
1311 if (!strcmp(var, "diff.compute")) {
1312 if (!strcmp(value, "delta")) {
1313 compute = COMPUTE_DELTA;
1314 } else if (!strcmp(value, "delta-abs")) {
1315 compute = COMPUTE_DELTA_ABS;
1316 } else if (!strcmp(value, "ratio")) {
1317 compute = COMPUTE_RATIO;
1318 } else if (!strcmp(value, "wdiff")) {
1319 compute = COMPUTE_WEIGHTED_DIFF;
1320 } else {
1321 pr_err("Invalid compute method: %s\n", value);
1322 return -1;
1323 }
1324 }
1325
1326 return 0;
1327}
1328
1329int cmd_diff(int argc, const char **argv)
1330{
1331 int ret = hists__init();
1332
1333 if (ret < 0)
1334 return ret;
1335
1336 perf_config(diff__config, NULL);
1337
1338 argc = parse_options(argc, argv, options, diff_usage, 0);
1339
1340 if (quiet)
1341 perf_quiet_option();
1342
1343 if (symbol__init(NULL) < 0)
1344 return -1;
1345
1346 if (data_init(argc, argv) < 0)
1347 return -1;
1348
1349 if (ui_init() < 0)
1350 return -1;
1351
1352 sort__mode = SORT_MODE__DIFF;
1353
1354 if (setup_sorting(NULL) < 0)
1355 usage_with_options(diff_usage, options);
1356
1357 setup_pager();
1358
1359 sort__setup_elide(NULL);
1360
1361 return __cmd_diff();
1362}