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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * builtin-diff.c
4 *
5 * Builtin diff command: Analyze two perf.data input files, look up and read
6 * DSOs and symbol information, sort them and produce a diff.
7 */
8#include "builtin.h"
9
10#include "util/debug.h"
11#include "util/event.h"
12#include "util/hist.h"
13#include "util/evsel.h"
14#include "util/evlist.h"
15#include "util/session.h"
16#include "util/tool.h"
17#include "util/sort.h"
18#include "util/symbol.h"
19#include "util/util.h"
20#include "util/data.h"
21#include "util/config.h"
22
23#include <errno.h>
24#include <inttypes.h>
25#include <stdlib.h>
26#include <math.h>
27
28/* Diff command specific HPP columns. */
29enum {
30 PERF_HPP_DIFF__BASELINE,
31 PERF_HPP_DIFF__PERIOD,
32 PERF_HPP_DIFF__PERIOD_BASELINE,
33 PERF_HPP_DIFF__DELTA,
34 PERF_HPP_DIFF__RATIO,
35 PERF_HPP_DIFF__WEIGHTED_DIFF,
36 PERF_HPP_DIFF__FORMULA,
37 PERF_HPP_DIFF__DELTA_ABS,
38
39 PERF_HPP_DIFF__MAX_INDEX
40};
41
42struct diff_hpp_fmt {
43 struct perf_hpp_fmt fmt;
44 int idx;
45 char *header;
46 int header_width;
47};
48
49struct data__file {
50 struct perf_session *session;
51 struct perf_data data;
52 int idx;
53 struct hists *hists;
54 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
55};
56
57static struct data__file *data__files;
58static int data__files_cnt;
59
60#define data__for_each_file_start(i, d, s) \
61 for (i = s, d = &data__files[s]; \
62 i < data__files_cnt; \
63 i++, d = &data__files[i])
64
65#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
66#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
67
68static bool force;
69static bool show_period;
70static bool show_formula;
71static bool show_baseline_only;
72static unsigned int sort_compute = 1;
73
74static s64 compute_wdiff_w1;
75static s64 compute_wdiff_w2;
76
77enum {
78 COMPUTE_DELTA,
79 COMPUTE_RATIO,
80 COMPUTE_WEIGHTED_DIFF,
81 COMPUTE_DELTA_ABS,
82 COMPUTE_MAX,
83};
84
85const char *compute_names[COMPUTE_MAX] = {
86 [COMPUTE_DELTA] = "delta",
87 [COMPUTE_DELTA_ABS] = "delta-abs",
88 [COMPUTE_RATIO] = "ratio",
89 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
90};
91
92static int compute = COMPUTE_DELTA_ABS;
93
94static int compute_2_hpp[COMPUTE_MAX] = {
95 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
96 [COMPUTE_DELTA_ABS] = PERF_HPP_DIFF__DELTA_ABS,
97 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
98 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
99};
100
101#define MAX_COL_WIDTH 70
102
103static struct header_column {
104 const char *name;
105 int width;
106} columns[PERF_HPP_DIFF__MAX_INDEX] = {
107 [PERF_HPP_DIFF__BASELINE] = {
108 .name = "Baseline",
109 },
110 [PERF_HPP_DIFF__PERIOD] = {
111 .name = "Period",
112 .width = 14,
113 },
114 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
115 .name = "Base period",
116 .width = 14,
117 },
118 [PERF_HPP_DIFF__DELTA] = {
119 .name = "Delta",
120 .width = 7,
121 },
122 [PERF_HPP_DIFF__DELTA_ABS] = {
123 .name = "Delta Abs",
124 .width = 7,
125 },
126 [PERF_HPP_DIFF__RATIO] = {
127 .name = "Ratio",
128 .width = 14,
129 },
130 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
131 .name = "Weighted diff",
132 .width = 14,
133 },
134 [PERF_HPP_DIFF__FORMULA] = {
135 .name = "Formula",
136 .width = MAX_COL_WIDTH,
137 }
138};
139
140static int setup_compute_opt_wdiff(char *opt)
141{
142 char *w1_str = opt;
143 char *w2_str;
144
145 int ret = -EINVAL;
146
147 if (!opt)
148 goto out;
149
150 w2_str = strchr(opt, ',');
151 if (!w2_str)
152 goto out;
153
154 *w2_str++ = 0x0;
155 if (!*w2_str)
156 goto out;
157
158 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
159 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
160
161 if (!compute_wdiff_w1 || !compute_wdiff_w2)
162 goto out;
163
164 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
165 compute_wdiff_w1, compute_wdiff_w2);
166
167 ret = 0;
168
169 out:
170 if (ret)
171 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
172
173 return ret;
174}
175
176static int setup_compute_opt(char *opt)
177{
178 if (compute == COMPUTE_WEIGHTED_DIFF)
179 return setup_compute_opt_wdiff(opt);
180
181 if (opt) {
182 pr_err("Failed: extra option specified '%s'", opt);
183 return -EINVAL;
184 }
185
186 return 0;
187}
188
189static int setup_compute(const struct option *opt, const char *str,
190 int unset __maybe_unused)
191{
192 int *cp = (int *) opt->value;
193 char *cstr = (char *) str;
194 char buf[50];
195 unsigned i;
196 char *option;
197
198 if (!str) {
199 *cp = COMPUTE_DELTA;
200 return 0;
201 }
202
203 option = strchr(str, ':');
204 if (option) {
205 unsigned len = option++ - str;
206
207 /*
208 * The str data are not writeable, so we need
209 * to use another buffer.
210 */
211
212 /* No option value is longer. */
213 if (len >= sizeof(buf))
214 return -EINVAL;
215
216 strncpy(buf, str, len);
217 buf[len] = 0x0;
218 cstr = buf;
219 }
220
221 for (i = 0; i < COMPUTE_MAX; i++)
222 if (!strcmp(cstr, compute_names[i])) {
223 *cp = i;
224 return setup_compute_opt(option);
225 }
226
227 pr_err("Failed: '%s' is not computation method "
228 "(use 'delta','ratio' or 'wdiff')\n", str);
229 return -EINVAL;
230}
231
232static double period_percent(struct hist_entry *he, u64 period)
233{
234 u64 total = hists__total_period(he->hists);
235
236 return (period * 100.0) / total;
237}
238
239static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
240{
241 double old_percent = period_percent(he, he->stat.period);
242 double new_percent = period_percent(pair, pair->stat.period);
243
244 pair->diff.period_ratio_delta = new_percent - old_percent;
245 pair->diff.computed = true;
246 return pair->diff.period_ratio_delta;
247}
248
249static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
250{
251 double old_period = he->stat.period ?: 1;
252 double new_period = pair->stat.period;
253
254 pair->diff.computed = true;
255 pair->diff.period_ratio = new_period / old_period;
256 return pair->diff.period_ratio;
257}
258
259static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
260{
261 u64 old_period = he->stat.period;
262 u64 new_period = pair->stat.period;
263
264 pair->diff.computed = true;
265 pair->diff.wdiff = new_period * compute_wdiff_w2 -
266 old_period * compute_wdiff_w1;
267
268 return pair->diff.wdiff;
269}
270
271static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
272 char *buf, size_t size)
273{
274 u64 he_total = he->hists->stats.total_period;
275 u64 pair_total = pair->hists->stats.total_period;
276
277 if (symbol_conf.filter_relative) {
278 he_total = he->hists->stats.total_non_filtered_period;
279 pair_total = pair->hists->stats.total_non_filtered_period;
280 }
281 return scnprintf(buf, size,
282 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
283 "(%" PRIu64 " * 100 / %" PRIu64 ")",
284 pair->stat.period, pair_total,
285 he->stat.period, he_total);
286}
287
288static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
289 char *buf, size_t size)
290{
291 double old_period = he->stat.period;
292 double new_period = pair->stat.period;
293
294 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
295}
296
297static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
298 char *buf, size_t size)
299{
300 u64 old_period = he->stat.period;
301 u64 new_period = pair->stat.period;
302
303 return scnprintf(buf, size,
304 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
305 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
306}
307
308static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
309 char *buf, size_t size)
310{
311 switch (compute) {
312 case COMPUTE_DELTA:
313 case COMPUTE_DELTA_ABS:
314 return formula_delta(he, pair, buf, size);
315 case COMPUTE_RATIO:
316 return formula_ratio(he, pair, buf, size);
317 case COMPUTE_WEIGHTED_DIFF:
318 return formula_wdiff(he, pair, buf, size);
319 default:
320 BUG_ON(1);
321 }
322
323 return -1;
324}
325
326static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
327 union perf_event *event,
328 struct perf_sample *sample,
329 struct perf_evsel *evsel,
330 struct machine *machine)
331{
332 struct addr_location al;
333 struct hists *hists = evsel__hists(evsel);
334 int ret = -1;
335
336 if (machine__resolve(machine, &al, sample) < 0) {
337 pr_warning("problem processing %d event, skipping it.\n",
338 event->header.type);
339 return -1;
340 }
341
342 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample, true)) {
343 pr_warning("problem incrementing symbol period, skipping event\n");
344 goto out_put;
345 }
346
347 /*
348 * The total_period is updated here before going to the output
349 * tree since normally only the baseline hists will call
350 * hists__output_resort() and precompute needs the total
351 * period in order to sort entries by percentage delta.
352 */
353 hists->stats.total_period += sample->period;
354 if (!al.filtered)
355 hists->stats.total_non_filtered_period += sample->period;
356 ret = 0;
357out_put:
358 addr_location__put(&al);
359 return ret;
360}
361
362static struct perf_tool tool = {
363 .sample = diff__process_sample_event,
364 .mmap = perf_event__process_mmap,
365 .mmap2 = perf_event__process_mmap2,
366 .comm = perf_event__process_comm,
367 .exit = perf_event__process_exit,
368 .fork = perf_event__process_fork,
369 .lost = perf_event__process_lost,
370 .namespaces = perf_event__process_namespaces,
371 .ordered_events = true,
372 .ordering_requires_timestamps = true,
373};
374
375static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
376 struct perf_evlist *evlist)
377{
378 struct perf_evsel *e;
379
380 evlist__for_each_entry(evlist, e) {
381 if (perf_evsel__match2(evsel, e))
382 return e;
383 }
384
385 return NULL;
386}
387
388static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
389{
390 struct perf_evsel *evsel;
391
392 evlist__for_each_entry(evlist, evsel) {
393 struct hists *hists = evsel__hists(evsel);
394
395 hists__collapse_resort(hists, NULL);
396 }
397}
398
399static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
400{
401 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
402 void *ptr = dfmt - dfmt->idx;
403 struct data__file *d = container_of(ptr, struct data__file, fmt);
404
405 return d;
406}
407
408static struct hist_entry*
409get_pair_data(struct hist_entry *he, struct data__file *d)
410{
411 if (hist_entry__has_pairs(he)) {
412 struct hist_entry *pair;
413
414 list_for_each_entry(pair, &he->pairs.head, pairs.node)
415 if (pair->hists == d->hists)
416 return pair;
417 }
418
419 return NULL;
420}
421
422static struct hist_entry*
423get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
424{
425 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
426
427 return get_pair_data(he, d);
428}
429
430static void hists__baseline_only(struct hists *hists)
431{
432 struct rb_root *root;
433 struct rb_node *next;
434
435 if (hists__has(hists, need_collapse))
436 root = &hists->entries_collapsed;
437 else
438 root = hists->entries_in;
439
440 next = rb_first(root);
441 while (next != NULL) {
442 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
443
444 next = rb_next(&he->rb_node_in);
445 if (!hist_entry__next_pair(he)) {
446 rb_erase(&he->rb_node_in, root);
447 hist_entry__delete(he);
448 }
449 }
450}
451
452static void hists__precompute(struct hists *hists)
453{
454 struct rb_root *root;
455 struct rb_node *next;
456
457 if (hists__has(hists, need_collapse))
458 root = &hists->entries_collapsed;
459 else
460 root = hists->entries_in;
461
462 next = rb_first(root);
463 while (next != NULL) {
464 struct hist_entry *he, *pair;
465 struct data__file *d;
466 int i;
467
468 he = rb_entry(next, struct hist_entry, rb_node_in);
469 next = rb_next(&he->rb_node_in);
470
471 data__for_each_file_new(i, d) {
472 pair = get_pair_data(he, d);
473 if (!pair)
474 continue;
475
476 switch (compute) {
477 case COMPUTE_DELTA:
478 case COMPUTE_DELTA_ABS:
479 compute_delta(he, pair);
480 break;
481 case COMPUTE_RATIO:
482 compute_ratio(he, pair);
483 break;
484 case COMPUTE_WEIGHTED_DIFF:
485 compute_wdiff(he, pair);
486 break;
487 default:
488 BUG_ON(1);
489 }
490 }
491 }
492}
493
494static int64_t cmp_doubles(double l, double r)
495{
496 if (l > r)
497 return -1;
498 else if (l < r)
499 return 1;
500 else
501 return 0;
502}
503
504static int64_t
505__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
506 int c)
507{
508 switch (c) {
509 case COMPUTE_DELTA:
510 {
511 double l = left->diff.period_ratio_delta;
512 double r = right->diff.period_ratio_delta;
513
514 return cmp_doubles(l, r);
515 }
516 case COMPUTE_DELTA_ABS:
517 {
518 double l = fabs(left->diff.period_ratio_delta);
519 double r = fabs(right->diff.period_ratio_delta);
520
521 return cmp_doubles(l, r);
522 }
523 case COMPUTE_RATIO:
524 {
525 double l = left->diff.period_ratio;
526 double r = right->diff.period_ratio;
527
528 return cmp_doubles(l, r);
529 }
530 case COMPUTE_WEIGHTED_DIFF:
531 {
532 s64 l = left->diff.wdiff;
533 s64 r = right->diff.wdiff;
534
535 return r - l;
536 }
537 default:
538 BUG_ON(1);
539 }
540
541 return 0;
542}
543
544static int64_t
545hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
546 int c, int sort_idx)
547{
548 bool pairs_left = hist_entry__has_pairs(left);
549 bool pairs_right = hist_entry__has_pairs(right);
550 struct hist_entry *p_right, *p_left;
551
552 if (!pairs_left && !pairs_right)
553 return 0;
554
555 if (!pairs_left || !pairs_right)
556 return pairs_left ? -1 : 1;
557
558 p_left = get_pair_data(left, &data__files[sort_idx]);
559 p_right = get_pair_data(right, &data__files[sort_idx]);
560
561 if (!p_left && !p_right)
562 return 0;
563
564 if (!p_left || !p_right)
565 return p_left ? -1 : 1;
566
567 /*
568 * We have 2 entries of same kind, let's
569 * make the data comparison.
570 */
571 return __hist_entry__cmp_compute(p_left, p_right, c);
572}
573
574static int64_t
575hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
576 int c, int sort_idx)
577{
578 struct hist_entry *p_right, *p_left;
579
580 p_left = get_pair_data(left, &data__files[sort_idx]);
581 p_right = get_pair_data(right, &data__files[sort_idx]);
582
583 if (!p_left && !p_right)
584 return 0;
585
586 if (!p_left || !p_right)
587 return p_left ? -1 : 1;
588
589 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
590 /*
591 * The delta can be computed without the baseline, but
592 * others are not. Put those entries which have no
593 * values below.
594 */
595 if (left->dummy && right->dummy)
596 return 0;
597
598 if (left->dummy || right->dummy)
599 return left->dummy ? 1 : -1;
600 }
601
602 return __hist_entry__cmp_compute(p_left, p_right, c);
603}
604
605static int64_t
606hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
607 struct hist_entry *left __maybe_unused,
608 struct hist_entry *right __maybe_unused)
609{
610 return 0;
611}
612
613static int64_t
614hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
615 struct hist_entry *left, struct hist_entry *right)
616{
617 if (left->stat.period == right->stat.period)
618 return 0;
619 return left->stat.period > right->stat.period ? 1 : -1;
620}
621
622static int64_t
623hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
624 struct hist_entry *left, struct hist_entry *right)
625{
626 struct data__file *d = fmt_to_data_file(fmt);
627
628 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
629}
630
631static int64_t
632hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
633 struct hist_entry *left, struct hist_entry *right)
634{
635 struct data__file *d = fmt_to_data_file(fmt);
636
637 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
638}
639
640static int64_t
641hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
642 struct hist_entry *left, struct hist_entry *right)
643{
644 struct data__file *d = fmt_to_data_file(fmt);
645
646 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
647}
648
649static int64_t
650hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
651 struct hist_entry *left, struct hist_entry *right)
652{
653 struct data__file *d = fmt_to_data_file(fmt);
654
655 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
656}
657
658static int64_t
659hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
660 struct hist_entry *left, struct hist_entry *right)
661{
662 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
663 sort_compute);
664}
665
666static int64_t
667hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
668 struct hist_entry *left, struct hist_entry *right)
669{
670 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
671 sort_compute);
672}
673
674static int64_t
675hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
676 struct hist_entry *left, struct hist_entry *right)
677{
678 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
679 sort_compute);
680}
681
682static int64_t
683hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
684 struct hist_entry *left, struct hist_entry *right)
685{
686 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
687 sort_compute);
688}
689
690static void hists__process(struct hists *hists)
691{
692 if (show_baseline_only)
693 hists__baseline_only(hists);
694
695 hists__precompute(hists);
696 hists__output_resort(hists, NULL);
697
698 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
699 symbol_conf.use_callchain);
700}
701
702static void data__fprintf(void)
703{
704 struct data__file *d;
705 int i;
706
707 fprintf(stdout, "# Data files:\n");
708
709 data__for_each_file(i, d)
710 fprintf(stdout, "# [%d] %s %s\n",
711 d->idx, d->data.file.path,
712 !d->idx ? "(Baseline)" : "");
713
714 fprintf(stdout, "#\n");
715}
716
717static void data_process(void)
718{
719 struct perf_evlist *evlist_base = data__files[0].session->evlist;
720 struct perf_evsel *evsel_base;
721 bool first = true;
722
723 evlist__for_each_entry(evlist_base, evsel_base) {
724 struct hists *hists_base = evsel__hists(evsel_base);
725 struct data__file *d;
726 int i;
727
728 data__for_each_file_new(i, d) {
729 struct perf_evlist *evlist = d->session->evlist;
730 struct perf_evsel *evsel;
731 struct hists *hists;
732
733 evsel = evsel_match(evsel_base, evlist);
734 if (!evsel)
735 continue;
736
737 hists = evsel__hists(evsel);
738 d->hists = hists;
739
740 hists__match(hists_base, hists);
741
742 if (!show_baseline_only)
743 hists__link(hists_base, hists);
744 }
745
746 if (!quiet) {
747 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
748 perf_evsel__name(evsel_base));
749 }
750
751 first = false;
752
753 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
754 data__fprintf();
755
756 /* Don't sort callchain for perf diff */
757 perf_evsel__reset_sample_bit(evsel_base, CALLCHAIN);
758
759 hists__process(hists_base);
760 }
761}
762
763static void data__free(struct data__file *d)
764{
765 int col;
766
767 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
768 struct diff_hpp_fmt *fmt = &d->fmt[col];
769
770 zfree(&fmt->header);
771 }
772}
773
774static int __cmd_diff(void)
775{
776 struct data__file *d;
777 int ret = -EINVAL, i;
778
779 data__for_each_file(i, d) {
780 d->session = perf_session__new(&d->data, false, &tool);
781 if (!d->session) {
782 pr_err("Failed to open %s\n", d->data.file.path);
783 ret = -1;
784 goto out_delete;
785 }
786
787 ret = perf_session__process_events(d->session);
788 if (ret) {
789 pr_err("Failed to process %s\n", d->data.file.path);
790 goto out_delete;
791 }
792
793 perf_evlist__collapse_resort(d->session->evlist);
794 }
795
796 data_process();
797
798 out_delete:
799 data__for_each_file(i, d) {
800 perf_session__delete(d->session);
801 data__free(d);
802 }
803
804 free(data__files);
805 return ret;
806}
807
808static const char * const diff_usage[] = {
809 "perf diff [<options>] [old_file] [new_file]",
810 NULL,
811};
812
813static const struct option options[] = {
814 OPT_INCR('v', "verbose", &verbose,
815 "be more verbose (show symbol address, etc)"),
816 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
817 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
818 "Show only items with match in baseline"),
819 OPT_CALLBACK('c', "compute", &compute,
820 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs)",
821 "Entries differential computation selection",
822 setup_compute),
823 OPT_BOOLEAN('p', "period", &show_period,
824 "Show period values."),
825 OPT_BOOLEAN('F', "formula", &show_formula,
826 "Show formula."),
827 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
828 "dump raw trace in ASCII"),
829 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
830 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
831 "file", "kallsyms pathname"),
832 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
833 "load module symbols - WARNING: use only with -k and LIVE kernel"),
834 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
835 "only consider symbols in these dsos"),
836 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
837 "only consider symbols in these comms"),
838 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
839 "only consider these symbols"),
840 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
841 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
842 " Please refer the man page for the complete list."),
843 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
844 "separator for columns, no spaces will be added between "
845 "columns '.' is reserved."),
846 OPT_CALLBACK(0, "symfs", NULL, "directory",
847 "Look for files with symbols relative to this directory",
848 symbol__config_symfs),
849 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
850 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
851 "How to display percentage of filtered entries", parse_filter_percentage),
852 OPT_END()
853};
854
855static double baseline_percent(struct hist_entry *he)
856{
857 u64 total = hists__total_period(he->hists);
858
859 return 100.0 * he->stat.period / total;
860}
861
862static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
863 struct perf_hpp *hpp, struct hist_entry *he)
864{
865 struct diff_hpp_fmt *dfmt =
866 container_of(fmt, struct diff_hpp_fmt, fmt);
867 double percent = baseline_percent(he);
868 char pfmt[20] = " ";
869
870 if (!he->dummy) {
871 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
872 return percent_color_snprintf(hpp->buf, hpp->size,
873 pfmt, percent);
874 } else
875 return scnprintf(hpp->buf, hpp->size, "%*s",
876 dfmt->header_width, pfmt);
877}
878
879static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
880{
881 double percent = baseline_percent(he);
882 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
883 int ret = 0;
884
885 if (!he->dummy)
886 ret = scnprintf(buf, size, fmt, percent);
887
888 return ret;
889}
890
891static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
892 struct perf_hpp *hpp, struct hist_entry *he,
893 int comparison_method)
894{
895 struct diff_hpp_fmt *dfmt =
896 container_of(fmt, struct diff_hpp_fmt, fmt);
897 struct hist_entry *pair = get_pair_fmt(he, dfmt);
898 double diff;
899 s64 wdiff;
900 char pfmt[20] = " ";
901
902 if (!pair)
903 goto no_print;
904
905 switch (comparison_method) {
906 case COMPUTE_DELTA:
907 if (pair->diff.computed)
908 diff = pair->diff.period_ratio_delta;
909 else
910 diff = compute_delta(he, pair);
911
912 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
913 return percent_color_snprintf(hpp->buf, hpp->size,
914 pfmt, diff);
915 case COMPUTE_RATIO:
916 if (he->dummy)
917 goto dummy_print;
918 if (pair->diff.computed)
919 diff = pair->diff.period_ratio;
920 else
921 diff = compute_ratio(he, pair);
922
923 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
924 return value_color_snprintf(hpp->buf, hpp->size,
925 pfmt, diff);
926 case COMPUTE_WEIGHTED_DIFF:
927 if (he->dummy)
928 goto dummy_print;
929 if (pair->diff.computed)
930 wdiff = pair->diff.wdiff;
931 else
932 wdiff = compute_wdiff(he, pair);
933
934 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
935 return color_snprintf(hpp->buf, hpp->size,
936 get_percent_color(wdiff),
937 pfmt, wdiff);
938 default:
939 BUG_ON(1);
940 }
941dummy_print:
942 return scnprintf(hpp->buf, hpp->size, "%*s",
943 dfmt->header_width, "N/A");
944no_print:
945 return scnprintf(hpp->buf, hpp->size, "%*s",
946 dfmt->header_width, pfmt);
947}
948
949static int hpp__color_delta(struct perf_hpp_fmt *fmt,
950 struct perf_hpp *hpp, struct hist_entry *he)
951{
952 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
953}
954
955static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
956 struct perf_hpp *hpp, struct hist_entry *he)
957{
958 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
959}
960
961static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
962 struct perf_hpp *hpp, struct hist_entry *he)
963{
964 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
965}
966
967static void
968hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
969{
970 switch (idx) {
971 case PERF_HPP_DIFF__PERIOD_BASELINE:
972 scnprintf(buf, size, "%" PRIu64, he->stat.period);
973 break;
974
975 default:
976 break;
977 }
978}
979
980static void
981hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
982 int idx, char *buf, size_t size)
983{
984 double diff;
985 double ratio;
986 s64 wdiff;
987
988 switch (idx) {
989 case PERF_HPP_DIFF__DELTA:
990 case PERF_HPP_DIFF__DELTA_ABS:
991 if (pair->diff.computed)
992 diff = pair->diff.period_ratio_delta;
993 else
994 diff = compute_delta(he, pair);
995
996 scnprintf(buf, size, "%+4.2F%%", diff);
997 break;
998
999 case PERF_HPP_DIFF__RATIO:
1000 /* No point for ratio number if we are dummy.. */
1001 if (he->dummy) {
1002 scnprintf(buf, size, "N/A");
1003 break;
1004 }
1005
1006 if (pair->diff.computed)
1007 ratio = pair->diff.period_ratio;
1008 else
1009 ratio = compute_ratio(he, pair);
1010
1011 if (ratio > 0.0)
1012 scnprintf(buf, size, "%14.6F", ratio);
1013 break;
1014
1015 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1016 /* No point for wdiff number if we are dummy.. */
1017 if (he->dummy) {
1018 scnprintf(buf, size, "N/A");
1019 break;
1020 }
1021
1022 if (pair->diff.computed)
1023 wdiff = pair->diff.wdiff;
1024 else
1025 wdiff = compute_wdiff(he, pair);
1026
1027 if (wdiff != 0)
1028 scnprintf(buf, size, "%14ld", wdiff);
1029 break;
1030
1031 case PERF_HPP_DIFF__FORMULA:
1032 formula_fprintf(he, pair, buf, size);
1033 break;
1034
1035 case PERF_HPP_DIFF__PERIOD:
1036 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1037 break;
1038
1039 default:
1040 BUG_ON(1);
1041 };
1042}
1043
1044static void
1045__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1046 char *buf, size_t size)
1047{
1048 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1049 int idx = dfmt->idx;
1050
1051 /* baseline is special */
1052 if (idx == PERF_HPP_DIFF__BASELINE)
1053 hpp__entry_baseline(he, buf, size);
1054 else {
1055 if (pair)
1056 hpp__entry_pair(he, pair, idx, buf, size);
1057 else
1058 hpp__entry_unpair(he, idx, buf, size);
1059 }
1060}
1061
1062static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1063 struct hist_entry *he)
1064{
1065 struct diff_hpp_fmt *dfmt =
1066 container_of(_fmt, struct diff_hpp_fmt, fmt);
1067 char buf[MAX_COL_WIDTH] = " ";
1068
1069 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1070
1071 if (symbol_conf.field_sep)
1072 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1073 else
1074 return scnprintf(hpp->buf, hpp->size, "%*s",
1075 dfmt->header_width, buf);
1076}
1077
1078static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1079 struct hists *hists __maybe_unused,
1080 int line __maybe_unused,
1081 int *span __maybe_unused)
1082{
1083 struct diff_hpp_fmt *dfmt =
1084 container_of(fmt, struct diff_hpp_fmt, fmt);
1085
1086 BUG_ON(!dfmt->header);
1087 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1088}
1089
1090static int hpp__width(struct perf_hpp_fmt *fmt,
1091 struct perf_hpp *hpp __maybe_unused,
1092 struct hists *hists __maybe_unused)
1093{
1094 struct diff_hpp_fmt *dfmt =
1095 container_of(fmt, struct diff_hpp_fmt, fmt);
1096
1097 BUG_ON(dfmt->header_width <= 0);
1098 return dfmt->header_width;
1099}
1100
1101static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1102{
1103#define MAX_HEADER_NAME 100
1104 char buf_indent[MAX_HEADER_NAME];
1105 char buf[MAX_HEADER_NAME];
1106 const char *header = NULL;
1107 int width = 0;
1108
1109 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1110 header = columns[dfmt->idx].name;
1111 width = columns[dfmt->idx].width;
1112
1113 /* Only our defined HPP fmts should appear here. */
1114 BUG_ON(!header);
1115
1116 if (data__files_cnt > 2)
1117 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1118
1119#define NAME (data__files_cnt > 2 ? buf : header)
1120 dfmt->header_width = width;
1121 width = (int) strlen(NAME);
1122 if (dfmt->header_width < width)
1123 dfmt->header_width = width;
1124
1125 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1126 dfmt->header_width, NAME);
1127
1128 dfmt->header = strdup(buf_indent);
1129#undef MAX_HEADER_NAME
1130#undef NAME
1131}
1132
1133static void data__hpp_register(struct data__file *d, int idx)
1134{
1135 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1136 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1137
1138 dfmt->idx = idx;
1139
1140 fmt->header = hpp__header;
1141 fmt->width = hpp__width;
1142 fmt->entry = hpp__entry_global;
1143 fmt->cmp = hist_entry__cmp_nop;
1144 fmt->collapse = hist_entry__cmp_nop;
1145
1146 /* TODO more colors */
1147 switch (idx) {
1148 case PERF_HPP_DIFF__BASELINE:
1149 fmt->color = hpp__color_baseline;
1150 fmt->sort = hist_entry__cmp_baseline;
1151 break;
1152 case PERF_HPP_DIFF__DELTA:
1153 fmt->color = hpp__color_delta;
1154 fmt->sort = hist_entry__cmp_delta;
1155 break;
1156 case PERF_HPP_DIFF__RATIO:
1157 fmt->color = hpp__color_ratio;
1158 fmt->sort = hist_entry__cmp_ratio;
1159 break;
1160 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1161 fmt->color = hpp__color_wdiff;
1162 fmt->sort = hist_entry__cmp_wdiff;
1163 break;
1164 case PERF_HPP_DIFF__DELTA_ABS:
1165 fmt->color = hpp__color_delta;
1166 fmt->sort = hist_entry__cmp_delta_abs;
1167 break;
1168 default:
1169 fmt->sort = hist_entry__cmp_nop;
1170 break;
1171 }
1172
1173 init_header(d, dfmt);
1174 perf_hpp__column_register(fmt);
1175 perf_hpp__register_sort_field(fmt);
1176}
1177
1178static int ui_init(void)
1179{
1180 struct data__file *d;
1181 struct perf_hpp_fmt *fmt;
1182 int i;
1183
1184 data__for_each_file(i, d) {
1185
1186 /*
1187 * Baseline or compute realted columns:
1188 *
1189 * PERF_HPP_DIFF__BASELINE
1190 * PERF_HPP_DIFF__DELTA
1191 * PERF_HPP_DIFF__RATIO
1192 * PERF_HPP_DIFF__WEIGHTED_DIFF
1193 */
1194 data__hpp_register(d, i ? compute_2_hpp[compute] :
1195 PERF_HPP_DIFF__BASELINE);
1196
1197 /*
1198 * And the rest:
1199 *
1200 * PERF_HPP_DIFF__FORMULA
1201 * PERF_HPP_DIFF__PERIOD
1202 * PERF_HPP_DIFF__PERIOD_BASELINE
1203 */
1204 if (show_formula && i)
1205 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1206
1207 if (show_period)
1208 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1209 PERF_HPP_DIFF__PERIOD_BASELINE);
1210 }
1211
1212 if (!sort_compute)
1213 return 0;
1214
1215 /*
1216 * Prepend an fmt to sort on columns at 'sort_compute' first.
1217 * This fmt is added only to the sort list but not to the
1218 * output fields list.
1219 *
1220 * Note that this column (data) can be compared twice - one
1221 * for this 'sort_compute' fmt and another for the normal
1222 * diff_hpp_fmt. But it shouldn't a problem as most entries
1223 * will be sorted out by first try or baseline and comparing
1224 * is not a costly operation.
1225 */
1226 fmt = zalloc(sizeof(*fmt));
1227 if (fmt == NULL) {
1228 pr_err("Memory allocation failed\n");
1229 return -1;
1230 }
1231
1232 fmt->cmp = hist_entry__cmp_nop;
1233 fmt->collapse = hist_entry__cmp_nop;
1234
1235 switch (compute) {
1236 case COMPUTE_DELTA:
1237 fmt->sort = hist_entry__cmp_delta_idx;
1238 break;
1239 case COMPUTE_RATIO:
1240 fmt->sort = hist_entry__cmp_ratio_idx;
1241 break;
1242 case COMPUTE_WEIGHTED_DIFF:
1243 fmt->sort = hist_entry__cmp_wdiff_idx;
1244 break;
1245 case COMPUTE_DELTA_ABS:
1246 fmt->sort = hist_entry__cmp_delta_abs_idx;
1247 break;
1248 default:
1249 BUG_ON(1);
1250 }
1251
1252 perf_hpp__prepend_sort_field(fmt);
1253 return 0;
1254}
1255
1256static int data_init(int argc, const char **argv)
1257{
1258 struct data__file *d;
1259 static const char *defaults[] = {
1260 "perf.data.old",
1261 "perf.data",
1262 };
1263 bool use_default = true;
1264 int i;
1265
1266 data__files_cnt = 2;
1267
1268 if (argc) {
1269 if (argc == 1)
1270 defaults[1] = argv[0];
1271 else {
1272 data__files_cnt = argc;
1273 use_default = false;
1274 }
1275 } else if (perf_guest) {
1276 defaults[0] = "perf.data.host";
1277 defaults[1] = "perf.data.guest";
1278 }
1279
1280 if (sort_compute >= (unsigned int) data__files_cnt) {
1281 pr_err("Order option out of limit.\n");
1282 return -EINVAL;
1283 }
1284
1285 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1286 if (!data__files)
1287 return -ENOMEM;
1288
1289 data__for_each_file(i, d) {
1290 struct perf_data *data = &d->data;
1291
1292 data->file.path = use_default ? defaults[i] : argv[i];
1293 data->mode = PERF_DATA_MODE_READ,
1294 data->force = force,
1295
1296 d->idx = i;
1297 }
1298
1299 return 0;
1300}
1301
1302static int diff__config(const char *var, const char *value,
1303 void *cb __maybe_unused)
1304{
1305 if (!strcmp(var, "diff.order")) {
1306 int ret;
1307 if (perf_config_int(&ret, var, value) < 0)
1308 return -1;
1309 sort_compute = ret;
1310 return 0;
1311 }
1312 if (!strcmp(var, "diff.compute")) {
1313 if (!strcmp(value, "delta")) {
1314 compute = COMPUTE_DELTA;
1315 } else if (!strcmp(value, "delta-abs")) {
1316 compute = COMPUTE_DELTA_ABS;
1317 } else if (!strcmp(value, "ratio")) {
1318 compute = COMPUTE_RATIO;
1319 } else if (!strcmp(value, "wdiff")) {
1320 compute = COMPUTE_WEIGHTED_DIFF;
1321 } else {
1322 pr_err("Invalid compute method: %s\n", value);
1323 return -1;
1324 }
1325 }
1326
1327 return 0;
1328}
1329
1330int cmd_diff(int argc, const char **argv)
1331{
1332 int ret = hists__init();
1333
1334 if (ret < 0)
1335 return ret;
1336
1337 perf_config(diff__config, NULL);
1338
1339 argc = parse_options(argc, argv, options, diff_usage, 0);
1340
1341 if (quiet)
1342 perf_quiet_option();
1343
1344 if (symbol__init(NULL) < 0)
1345 return -1;
1346
1347 if (data_init(argc, argv) < 0)
1348 return -1;
1349
1350 if (ui_init() < 0)
1351 return -1;
1352
1353 sort__mode = SORT_MODE__DIFF;
1354
1355 if (setup_sorting(NULL) < 0)
1356 usage_with_options(diff_usage, options);
1357
1358 setup_pager();
1359
1360 sort__setup_elide(NULL);
1361
1362 return __cmd_diff();
1363}
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
21#include <stdlib.h>
22#include <math.h>
23
24/* Diff command specific HPP columns. */
25enum {
26 PERF_HPP_DIFF__BASELINE,
27 PERF_HPP_DIFF__PERIOD,
28 PERF_HPP_DIFF__PERIOD_BASELINE,
29 PERF_HPP_DIFF__DELTA,
30 PERF_HPP_DIFF__RATIO,
31 PERF_HPP_DIFF__WEIGHTED_DIFF,
32 PERF_HPP_DIFF__FORMULA,
33
34 PERF_HPP_DIFF__MAX_INDEX
35};
36
37struct diff_hpp_fmt {
38 struct perf_hpp_fmt fmt;
39 int idx;
40 char *header;
41 int header_width;
42};
43
44struct data__file {
45 struct perf_session *session;
46 struct perf_data_file file;
47 int idx;
48 struct hists *hists;
49 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
50};
51
52static struct data__file *data__files;
53static int data__files_cnt;
54
55#define data__for_each_file_start(i, d, s) \
56 for (i = s, d = &data__files[s]; \
57 i < data__files_cnt; \
58 i++, d = &data__files[i])
59
60#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
61#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
62
63static char diff__default_sort_order[] = "dso,symbol";
64static bool force;
65static bool show_period;
66static bool show_formula;
67static bool show_baseline_only;
68static unsigned int sort_compute;
69
70static s64 compute_wdiff_w1;
71static s64 compute_wdiff_w2;
72
73enum {
74 COMPUTE_DELTA,
75 COMPUTE_RATIO,
76 COMPUTE_WEIGHTED_DIFF,
77 COMPUTE_MAX,
78};
79
80const char *compute_names[COMPUTE_MAX] = {
81 [COMPUTE_DELTA] = "delta",
82 [COMPUTE_RATIO] = "ratio",
83 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
84};
85
86static int compute;
87
88static int compute_2_hpp[COMPUTE_MAX] = {
89 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
90 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
91 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
92};
93
94#define MAX_COL_WIDTH 70
95
96static struct header_column {
97 const char *name;
98 int width;
99} columns[PERF_HPP_DIFF__MAX_INDEX] = {
100 [PERF_HPP_DIFF__BASELINE] = {
101 .name = "Baseline",
102 },
103 [PERF_HPP_DIFF__PERIOD] = {
104 .name = "Period",
105 .width = 14,
106 },
107 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
108 .name = "Base period",
109 .width = 14,
110 },
111 [PERF_HPP_DIFF__DELTA] = {
112 .name = "Delta",
113 .width = 7,
114 },
115 [PERF_HPP_DIFF__RATIO] = {
116 .name = "Ratio",
117 .width = 14,
118 },
119 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
120 .name = "Weighted diff",
121 .width = 14,
122 },
123 [PERF_HPP_DIFF__FORMULA] = {
124 .name = "Formula",
125 .width = MAX_COL_WIDTH,
126 }
127};
128
129static int setup_compute_opt_wdiff(char *opt)
130{
131 char *w1_str = opt;
132 char *w2_str;
133
134 int ret = -EINVAL;
135
136 if (!opt)
137 goto out;
138
139 w2_str = strchr(opt, ',');
140 if (!w2_str)
141 goto out;
142
143 *w2_str++ = 0x0;
144 if (!*w2_str)
145 goto out;
146
147 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
148 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
149
150 if (!compute_wdiff_w1 || !compute_wdiff_w2)
151 goto out;
152
153 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
154 compute_wdiff_w1, compute_wdiff_w2);
155
156 ret = 0;
157
158 out:
159 if (ret)
160 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
161
162 return ret;
163}
164
165static int setup_compute_opt(char *opt)
166{
167 if (compute == COMPUTE_WEIGHTED_DIFF)
168 return setup_compute_opt_wdiff(opt);
169
170 if (opt) {
171 pr_err("Failed: extra option specified '%s'", opt);
172 return -EINVAL;
173 }
174
175 return 0;
176}
177
178static int setup_compute(const struct option *opt, const char *str,
179 int unset __maybe_unused)
180{
181 int *cp = (int *) opt->value;
182 char *cstr = (char *) str;
183 char buf[50];
184 unsigned i;
185 char *option;
186
187 if (!str) {
188 *cp = COMPUTE_DELTA;
189 return 0;
190 }
191
192 option = strchr(str, ':');
193 if (option) {
194 unsigned len = option++ - str;
195
196 /*
197 * The str data are not writeable, so we need
198 * to use another buffer.
199 */
200
201 /* No option value is longer. */
202 if (len >= sizeof(buf))
203 return -EINVAL;
204
205 strncpy(buf, str, len);
206 buf[len] = 0x0;
207 cstr = buf;
208 }
209
210 for (i = 0; i < COMPUTE_MAX; i++)
211 if (!strcmp(cstr, compute_names[i])) {
212 *cp = i;
213 return setup_compute_opt(option);
214 }
215
216 pr_err("Failed: '%s' is not computation method "
217 "(use 'delta','ratio' or 'wdiff')\n", str);
218 return -EINVAL;
219}
220
221static double period_percent(struct hist_entry *he, u64 period)
222{
223 u64 total = he->hists->stats.total_period;
224 return (period * 100.0) / total;
225}
226
227static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
228{
229 double old_percent = period_percent(he, he->stat.period);
230 double new_percent = period_percent(pair, pair->stat.period);
231
232 pair->diff.period_ratio_delta = new_percent - old_percent;
233 pair->diff.computed = true;
234 return pair->diff.period_ratio_delta;
235}
236
237static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
238{
239 double old_period = he->stat.period ?: 1;
240 double new_period = pair->stat.period;
241
242 pair->diff.computed = true;
243 pair->diff.period_ratio = new_period / old_period;
244 return pair->diff.period_ratio;
245}
246
247static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
248{
249 u64 old_period = he->stat.period;
250 u64 new_period = pair->stat.period;
251
252 pair->diff.computed = true;
253 pair->diff.wdiff = new_period * compute_wdiff_w2 -
254 old_period * compute_wdiff_w1;
255
256 return pair->diff.wdiff;
257}
258
259static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
260 char *buf, size_t size)
261{
262 return scnprintf(buf, size,
263 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
264 "(%" PRIu64 " * 100 / %" PRIu64 ")",
265 pair->stat.period, pair->hists->stats.total_period,
266 he->stat.period, he->hists->stats.total_period);
267}
268
269static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
270 char *buf, size_t size)
271{
272 double old_period = he->stat.period;
273 double new_period = pair->stat.period;
274
275 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
276}
277
278static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
279 char *buf, size_t size)
280{
281 u64 old_period = he->stat.period;
282 u64 new_period = pair->stat.period;
283
284 return scnprintf(buf, size,
285 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
286 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
287}
288
289static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
290 char *buf, size_t size)
291{
292 switch (compute) {
293 case COMPUTE_DELTA:
294 return formula_delta(he, pair, buf, size);
295 case COMPUTE_RATIO:
296 return formula_ratio(he, pair, buf, size);
297 case COMPUTE_WEIGHTED_DIFF:
298 return formula_wdiff(he, pair, buf, size);
299 default:
300 BUG_ON(1);
301 }
302
303 return -1;
304}
305
306static int hists__add_entry(struct hists *hists,
307 struct addr_location *al, u64 period,
308 u64 weight, u64 transaction)
309{
310 if (__hists__add_entry(hists, al, NULL, NULL, NULL, period, weight,
311 transaction) != NULL)
312 return 0;
313 return -ENOMEM;
314}
315
316static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
317 union perf_event *event,
318 struct perf_sample *sample,
319 struct perf_evsel *evsel,
320 struct machine *machine)
321{
322 struct addr_location al;
323
324 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
325 pr_warning("problem processing %d event, skipping it.\n",
326 event->header.type);
327 return -1;
328 }
329
330 if (al.filtered)
331 return 0;
332
333 if (hists__add_entry(&evsel->hists, &al, sample->period,
334 sample->weight, sample->transaction)) {
335 pr_warning("problem incrementing symbol period, skipping event\n");
336 return -1;
337 }
338
339 evsel->hists.stats.total_period += sample->period;
340 return 0;
341}
342
343static struct perf_tool tool = {
344 .sample = diff__process_sample_event,
345 .mmap = perf_event__process_mmap,
346 .comm = perf_event__process_comm,
347 .exit = perf_event__process_exit,
348 .fork = perf_event__process_fork,
349 .lost = perf_event__process_lost,
350 .ordered_samples = true,
351 .ordering_requires_timestamps = true,
352};
353
354static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
355 struct perf_evlist *evlist)
356{
357 struct perf_evsel *e;
358
359 evlist__for_each(evlist, e) {
360 if (perf_evsel__match2(evsel, e))
361 return e;
362 }
363
364 return NULL;
365}
366
367static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
368{
369 struct perf_evsel *evsel;
370
371 evlist__for_each(evlist, evsel) {
372 struct hists *hists = &evsel->hists;
373
374 hists__collapse_resort(hists, NULL);
375 }
376}
377
378static struct hist_entry*
379get_pair_data(struct hist_entry *he, struct data__file *d)
380{
381 if (hist_entry__has_pairs(he)) {
382 struct hist_entry *pair;
383
384 list_for_each_entry(pair, &he->pairs.head, pairs.node)
385 if (pair->hists == d->hists)
386 return pair;
387 }
388
389 return NULL;
390}
391
392static struct hist_entry*
393get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
394{
395 void *ptr = dfmt - dfmt->idx;
396 struct data__file *d = container_of(ptr, struct data__file, fmt);
397
398 return get_pair_data(he, d);
399}
400
401static void hists__baseline_only(struct hists *hists)
402{
403 struct rb_root *root;
404 struct rb_node *next;
405
406 if (sort__need_collapse)
407 root = &hists->entries_collapsed;
408 else
409 root = hists->entries_in;
410
411 next = rb_first(root);
412 while (next != NULL) {
413 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
414
415 next = rb_next(&he->rb_node_in);
416 if (!hist_entry__next_pair(he)) {
417 rb_erase(&he->rb_node_in, root);
418 hist_entry__free(he);
419 }
420 }
421}
422
423static void hists__precompute(struct hists *hists)
424{
425 struct rb_root *root;
426 struct rb_node *next;
427
428 if (sort__need_collapse)
429 root = &hists->entries_collapsed;
430 else
431 root = hists->entries_in;
432
433 next = rb_first(root);
434 while (next != NULL) {
435 struct hist_entry *he, *pair;
436
437 he = rb_entry(next, struct hist_entry, rb_node_in);
438 next = rb_next(&he->rb_node_in);
439
440 pair = get_pair_data(he, &data__files[sort_compute]);
441 if (!pair)
442 continue;
443
444 switch (compute) {
445 case COMPUTE_DELTA:
446 compute_delta(he, pair);
447 break;
448 case COMPUTE_RATIO:
449 compute_ratio(he, pair);
450 break;
451 case COMPUTE_WEIGHTED_DIFF:
452 compute_wdiff(he, pair);
453 break;
454 default:
455 BUG_ON(1);
456 }
457 }
458}
459
460static int64_t cmp_doubles(double l, double r)
461{
462 if (l > r)
463 return -1;
464 else if (l < r)
465 return 1;
466 else
467 return 0;
468}
469
470static int64_t
471__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
472 int c)
473{
474 switch (c) {
475 case COMPUTE_DELTA:
476 {
477 double l = left->diff.period_ratio_delta;
478 double r = right->diff.period_ratio_delta;
479
480 return cmp_doubles(l, r);
481 }
482 case COMPUTE_RATIO:
483 {
484 double l = left->diff.period_ratio;
485 double r = right->diff.period_ratio;
486
487 return cmp_doubles(l, r);
488 }
489 case COMPUTE_WEIGHTED_DIFF:
490 {
491 s64 l = left->diff.wdiff;
492 s64 r = right->diff.wdiff;
493
494 return r - l;
495 }
496 default:
497 BUG_ON(1);
498 }
499
500 return 0;
501}
502
503static int64_t
504hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
505 int c)
506{
507 bool pairs_left = hist_entry__has_pairs(left);
508 bool pairs_right = hist_entry__has_pairs(right);
509 struct hist_entry *p_right, *p_left;
510
511 if (!pairs_left && !pairs_right)
512 return 0;
513
514 if (!pairs_left || !pairs_right)
515 return pairs_left ? -1 : 1;
516
517 p_left = get_pair_data(left, &data__files[sort_compute]);
518 p_right = get_pair_data(right, &data__files[sort_compute]);
519
520 if (!p_left && !p_right)
521 return 0;
522
523 if (!p_left || !p_right)
524 return p_left ? -1 : 1;
525
526 /*
527 * We have 2 entries of same kind, let's
528 * make the data comparison.
529 */
530 return __hist_entry__cmp_compute(p_left, p_right, c);
531}
532
533static void insert_hist_entry_by_compute(struct rb_root *root,
534 struct hist_entry *he,
535 int c)
536{
537 struct rb_node **p = &root->rb_node;
538 struct rb_node *parent = NULL;
539 struct hist_entry *iter;
540
541 while (*p != NULL) {
542 parent = *p;
543 iter = rb_entry(parent, struct hist_entry, rb_node);
544 if (hist_entry__cmp_compute(he, iter, c) < 0)
545 p = &(*p)->rb_left;
546 else
547 p = &(*p)->rb_right;
548 }
549
550 rb_link_node(&he->rb_node, parent, p);
551 rb_insert_color(&he->rb_node, root);
552}
553
554static void hists__compute_resort(struct hists *hists)
555{
556 struct rb_root *root;
557 struct rb_node *next;
558
559 if (sort__need_collapse)
560 root = &hists->entries_collapsed;
561 else
562 root = hists->entries_in;
563
564 hists->entries = RB_ROOT;
565 next = rb_first(root);
566
567 hists->nr_entries = 0;
568 hists->stats.total_period = 0;
569 hists__reset_col_len(hists);
570
571 while (next != NULL) {
572 struct hist_entry *he;
573
574 he = rb_entry(next, struct hist_entry, rb_node_in);
575 next = rb_next(&he->rb_node_in);
576
577 insert_hist_entry_by_compute(&hists->entries, he, compute);
578 hists__inc_nr_entries(hists, he);
579 }
580}
581
582static void hists__process(struct hists *hists)
583{
584 if (show_baseline_only)
585 hists__baseline_only(hists);
586
587 if (sort_compute) {
588 hists__precompute(hists);
589 hists__compute_resort(hists);
590 } else {
591 hists__output_resort(hists);
592 }
593
594 hists__fprintf(hists, true, 0, 0, 0, stdout);
595}
596
597static void data__fprintf(void)
598{
599 struct data__file *d;
600 int i;
601
602 fprintf(stdout, "# Data files:\n");
603
604 data__for_each_file(i, d)
605 fprintf(stdout, "# [%d] %s %s\n",
606 d->idx, d->file.path,
607 !d->idx ? "(Baseline)" : "");
608
609 fprintf(stdout, "#\n");
610}
611
612static void data_process(void)
613{
614 struct perf_evlist *evlist_base = data__files[0].session->evlist;
615 struct perf_evsel *evsel_base;
616 bool first = true;
617
618 evlist__for_each(evlist_base, evsel_base) {
619 struct data__file *d;
620 int i;
621
622 data__for_each_file_new(i, d) {
623 struct perf_evlist *evlist = d->session->evlist;
624 struct perf_evsel *evsel;
625
626 evsel = evsel_match(evsel_base, evlist);
627 if (!evsel)
628 continue;
629
630 d->hists = &evsel->hists;
631
632 hists__match(&evsel_base->hists, &evsel->hists);
633
634 if (!show_baseline_only)
635 hists__link(&evsel_base->hists,
636 &evsel->hists);
637 }
638
639 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
640 perf_evsel__name(evsel_base));
641
642 first = false;
643
644 if (verbose || data__files_cnt > 2)
645 data__fprintf();
646
647 hists__process(&evsel_base->hists);
648 }
649}
650
651static void data__free(struct data__file *d)
652{
653 int col;
654
655 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
656 struct diff_hpp_fmt *fmt = &d->fmt[col];
657
658 zfree(&fmt->header);
659 }
660}
661
662static int __cmd_diff(void)
663{
664 struct data__file *d;
665 int ret = -EINVAL, i;
666
667 data__for_each_file(i, d) {
668 d->session = perf_session__new(&d->file, false, &tool);
669 if (!d->session) {
670 pr_err("Failed to open %s\n", d->file.path);
671 ret = -ENOMEM;
672 goto out_delete;
673 }
674
675 ret = perf_session__process_events(d->session, &tool);
676 if (ret) {
677 pr_err("Failed to process %s\n", d->file.path);
678 goto out_delete;
679 }
680
681 perf_evlist__collapse_resort(d->session->evlist);
682 }
683
684 data_process();
685
686 out_delete:
687 data__for_each_file(i, d) {
688 if (d->session)
689 perf_session__delete(d->session);
690
691 data__free(d);
692 }
693
694 free(data__files);
695 return ret;
696}
697
698static const char * const diff_usage[] = {
699 "perf diff [<options>] [old_file] [new_file]",
700 NULL,
701};
702
703static const struct option options[] = {
704 OPT_INCR('v', "verbose", &verbose,
705 "be more verbose (show symbol address, etc)"),
706 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
707 "Show only items with match in baseline"),
708 OPT_CALLBACK('c', "compute", &compute,
709 "delta,ratio,wdiff:w1,w2 (default delta)",
710 "Entries differential computation selection",
711 setup_compute),
712 OPT_BOOLEAN('p', "period", &show_period,
713 "Show period values."),
714 OPT_BOOLEAN('F', "formula", &show_formula,
715 "Show formula."),
716 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
717 "dump raw trace in ASCII"),
718 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
719 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
720 "load module symbols - WARNING: use only with -k and LIVE kernel"),
721 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
722 "only consider symbols in these dsos"),
723 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
724 "only consider symbols in these comms"),
725 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
726 "only consider these symbols"),
727 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
728 "sort by key(s): pid, comm, dso, symbol, parent"),
729 OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
730 "separator for columns, no spaces will be added between "
731 "columns '.' is reserved."),
732 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
733 "Look for files with symbols relative to this directory"),
734 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
735 OPT_END()
736};
737
738static double baseline_percent(struct hist_entry *he)
739{
740 struct hists *hists = he->hists;
741 return 100.0 * he->stat.period / hists->stats.total_period;
742}
743
744static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
745 struct perf_hpp *hpp, struct hist_entry *he)
746{
747 struct diff_hpp_fmt *dfmt =
748 container_of(fmt, struct diff_hpp_fmt, fmt);
749 double percent = baseline_percent(he);
750 char pfmt[20] = " ";
751
752 if (!he->dummy) {
753 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
754 return percent_color_snprintf(hpp->buf, hpp->size,
755 pfmt, percent);
756 } else
757 return scnprintf(hpp->buf, hpp->size, "%*s",
758 dfmt->header_width, pfmt);
759}
760
761static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
762{
763 double percent = baseline_percent(he);
764 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
765 int ret = 0;
766
767 if (!he->dummy)
768 ret = scnprintf(buf, size, fmt, percent);
769
770 return ret;
771}
772
773static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
774 struct perf_hpp *hpp, struct hist_entry *he,
775 int comparison_method)
776{
777 struct diff_hpp_fmt *dfmt =
778 container_of(fmt, struct diff_hpp_fmt, fmt);
779 struct hist_entry *pair = get_pair_fmt(he, dfmt);
780 double diff;
781 s64 wdiff;
782 char pfmt[20] = " ";
783
784 if (!pair)
785 goto dummy_print;
786
787 switch (comparison_method) {
788 case COMPUTE_DELTA:
789 if (pair->diff.computed)
790 diff = pair->diff.period_ratio_delta;
791 else
792 diff = compute_delta(he, pair);
793
794 if (fabs(diff) < 0.01)
795 goto dummy_print;
796 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
797 return percent_color_snprintf(hpp->buf, hpp->size,
798 pfmt, diff);
799 case COMPUTE_RATIO:
800 if (he->dummy)
801 goto dummy_print;
802 if (pair->diff.computed)
803 diff = pair->diff.period_ratio;
804 else
805 diff = compute_ratio(he, pair);
806
807 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
808 return value_color_snprintf(hpp->buf, hpp->size,
809 pfmt, diff);
810 case COMPUTE_WEIGHTED_DIFF:
811 if (he->dummy)
812 goto dummy_print;
813 if (pair->diff.computed)
814 wdiff = pair->diff.wdiff;
815 else
816 wdiff = compute_wdiff(he, pair);
817
818 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
819 return color_snprintf(hpp->buf, hpp->size,
820 get_percent_color(wdiff),
821 pfmt, wdiff);
822 default:
823 BUG_ON(1);
824 }
825dummy_print:
826 return scnprintf(hpp->buf, hpp->size, "%*s",
827 dfmt->header_width, pfmt);
828}
829
830static int hpp__color_delta(struct perf_hpp_fmt *fmt,
831 struct perf_hpp *hpp, struct hist_entry *he)
832{
833 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
834}
835
836static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
837 struct perf_hpp *hpp, struct hist_entry *he)
838{
839 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
840}
841
842static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
843 struct perf_hpp *hpp, struct hist_entry *he)
844{
845 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
846}
847
848static void
849hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
850{
851 switch (idx) {
852 case PERF_HPP_DIFF__PERIOD_BASELINE:
853 scnprintf(buf, size, "%" PRIu64, he->stat.period);
854 break;
855
856 default:
857 break;
858 }
859}
860
861static void
862hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
863 int idx, char *buf, size_t size)
864{
865 double diff;
866 double ratio;
867 s64 wdiff;
868
869 switch (idx) {
870 case PERF_HPP_DIFF__DELTA:
871 if (pair->diff.computed)
872 diff = pair->diff.period_ratio_delta;
873 else
874 diff = compute_delta(he, pair);
875
876 if (fabs(diff) >= 0.01)
877 scnprintf(buf, size, "%+4.2F%%", diff);
878 break;
879
880 case PERF_HPP_DIFF__RATIO:
881 /* No point for ratio number if we are dummy.. */
882 if (he->dummy)
883 break;
884
885 if (pair->diff.computed)
886 ratio = pair->diff.period_ratio;
887 else
888 ratio = compute_ratio(he, pair);
889
890 if (ratio > 0.0)
891 scnprintf(buf, size, "%14.6F", ratio);
892 break;
893
894 case PERF_HPP_DIFF__WEIGHTED_DIFF:
895 /* No point for wdiff number if we are dummy.. */
896 if (he->dummy)
897 break;
898
899 if (pair->diff.computed)
900 wdiff = pair->diff.wdiff;
901 else
902 wdiff = compute_wdiff(he, pair);
903
904 if (wdiff != 0)
905 scnprintf(buf, size, "%14ld", wdiff);
906 break;
907
908 case PERF_HPP_DIFF__FORMULA:
909 formula_fprintf(he, pair, buf, size);
910 break;
911
912 case PERF_HPP_DIFF__PERIOD:
913 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
914 break;
915
916 default:
917 BUG_ON(1);
918 };
919}
920
921static void
922__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
923 char *buf, size_t size)
924{
925 struct hist_entry *pair = get_pair_fmt(he, dfmt);
926 int idx = dfmt->idx;
927
928 /* baseline is special */
929 if (idx == PERF_HPP_DIFF__BASELINE)
930 hpp__entry_baseline(he, buf, size);
931 else {
932 if (pair)
933 hpp__entry_pair(he, pair, idx, buf, size);
934 else
935 hpp__entry_unpair(he, idx, buf, size);
936 }
937}
938
939static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
940 struct hist_entry *he)
941{
942 struct diff_hpp_fmt *dfmt =
943 container_of(_fmt, struct diff_hpp_fmt, fmt);
944 char buf[MAX_COL_WIDTH] = " ";
945
946 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
947
948 if (symbol_conf.field_sep)
949 return scnprintf(hpp->buf, hpp->size, "%s", buf);
950 else
951 return scnprintf(hpp->buf, hpp->size, "%*s",
952 dfmt->header_width, buf);
953}
954
955static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
956 struct perf_evsel *evsel __maybe_unused)
957{
958 struct diff_hpp_fmt *dfmt =
959 container_of(fmt, struct diff_hpp_fmt, fmt);
960
961 BUG_ON(!dfmt->header);
962 return scnprintf(hpp->buf, hpp->size, dfmt->header);
963}
964
965static int hpp__width(struct perf_hpp_fmt *fmt,
966 struct perf_hpp *hpp __maybe_unused,
967 struct perf_evsel *evsel __maybe_unused)
968{
969 struct diff_hpp_fmt *dfmt =
970 container_of(fmt, struct diff_hpp_fmt, fmt);
971
972 BUG_ON(dfmt->header_width <= 0);
973 return dfmt->header_width;
974}
975
976static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
977{
978#define MAX_HEADER_NAME 100
979 char buf_indent[MAX_HEADER_NAME];
980 char buf[MAX_HEADER_NAME];
981 const char *header = NULL;
982 int width = 0;
983
984 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
985 header = columns[dfmt->idx].name;
986 width = columns[dfmt->idx].width;
987
988 /* Only our defined HPP fmts should appear here. */
989 BUG_ON(!header);
990
991 if (data__files_cnt > 2)
992 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
993
994#define NAME (data__files_cnt > 2 ? buf : header)
995 dfmt->header_width = width;
996 width = (int) strlen(NAME);
997 if (dfmt->header_width < width)
998 dfmt->header_width = width;
999
1000 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1001 dfmt->header_width, NAME);
1002
1003 dfmt->header = strdup(buf_indent);
1004#undef MAX_HEADER_NAME
1005#undef NAME
1006}
1007
1008static void data__hpp_register(struct data__file *d, int idx)
1009{
1010 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1011 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1012
1013 dfmt->idx = idx;
1014
1015 fmt->header = hpp__header;
1016 fmt->width = hpp__width;
1017 fmt->entry = hpp__entry_global;
1018
1019 /* TODO more colors */
1020 switch (idx) {
1021 case PERF_HPP_DIFF__BASELINE:
1022 fmt->color = hpp__color_baseline;
1023 break;
1024 case PERF_HPP_DIFF__DELTA:
1025 fmt->color = hpp__color_delta;
1026 break;
1027 case PERF_HPP_DIFF__RATIO:
1028 fmt->color = hpp__color_ratio;
1029 break;
1030 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1031 fmt->color = hpp__color_wdiff;
1032 break;
1033 default:
1034 break;
1035 }
1036
1037 init_header(d, dfmt);
1038 perf_hpp__column_register(fmt);
1039}
1040
1041static void ui_init(void)
1042{
1043 struct data__file *d;
1044 int i;
1045
1046 data__for_each_file(i, d) {
1047
1048 /*
1049 * Baseline or compute realted columns:
1050 *
1051 * PERF_HPP_DIFF__BASELINE
1052 * PERF_HPP_DIFF__DELTA
1053 * PERF_HPP_DIFF__RATIO
1054 * PERF_HPP_DIFF__WEIGHTED_DIFF
1055 */
1056 data__hpp_register(d, i ? compute_2_hpp[compute] :
1057 PERF_HPP_DIFF__BASELINE);
1058
1059 /*
1060 * And the rest:
1061 *
1062 * PERF_HPP_DIFF__FORMULA
1063 * PERF_HPP_DIFF__PERIOD
1064 * PERF_HPP_DIFF__PERIOD_BASELINE
1065 */
1066 if (show_formula && i)
1067 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1068
1069 if (show_period)
1070 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1071 PERF_HPP_DIFF__PERIOD_BASELINE);
1072 }
1073}
1074
1075static int data_init(int argc, const char **argv)
1076{
1077 struct data__file *d;
1078 static const char *defaults[] = {
1079 "perf.data.old",
1080 "perf.data",
1081 };
1082 bool use_default = true;
1083 int i;
1084
1085 data__files_cnt = 2;
1086
1087 if (argc) {
1088 if (argc == 1)
1089 defaults[1] = argv[0];
1090 else {
1091 data__files_cnt = argc;
1092 use_default = false;
1093 }
1094 } else if (perf_guest) {
1095 defaults[0] = "perf.data.host";
1096 defaults[1] = "perf.data.guest";
1097 }
1098
1099 if (sort_compute >= (unsigned int) data__files_cnt) {
1100 pr_err("Order option out of limit.\n");
1101 return -EINVAL;
1102 }
1103
1104 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1105 if (!data__files)
1106 return -ENOMEM;
1107
1108 data__for_each_file(i, d) {
1109 struct perf_data_file *file = &d->file;
1110
1111 file->path = use_default ? defaults[i] : argv[i];
1112 file->mode = PERF_DATA_MODE_READ,
1113 file->force = force,
1114
1115 d->idx = i;
1116 }
1117
1118 return 0;
1119}
1120
1121int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1122{
1123 sort_order = diff__default_sort_order;
1124 argc = parse_options(argc, argv, options, diff_usage, 0);
1125
1126 if (symbol__init() < 0)
1127 return -1;
1128
1129 if (data_init(argc, argv) < 0)
1130 return -1;
1131
1132 ui_init();
1133
1134 if (setup_sorting() < 0)
1135 usage_with_options(diff_usage, options);
1136
1137 setup_pager();
1138
1139 sort__setup_elide(NULL);
1140
1141 return __cmd_diff();
1142}