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