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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}
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/srcline.h"
19#include "util/symbol.h"
20#include "util/data.h"
21#include "util/config.h"
22#include "util/time-utils.h"
23#include "util/annotate.h"
24#include "util/map.h"
25#include "util/spark.h"
26#include "util/block-info.h"
27#include "util/stream.h"
28#include "util/util.h"
29#include <linux/err.h>
30#include <linux/zalloc.h>
31#include <subcmd/pager.h>
32#include <subcmd/parse-options.h>
33
34#include <errno.h>
35#include <inttypes.h>
36#include <stdlib.h>
37#include <math.h>
38
39struct perf_diff {
40 struct perf_tool tool;
41 const char *time_str;
42 struct perf_time_interval *ptime_range;
43 int range_size;
44 int range_num;
45 bool has_br_stack;
46 bool stream;
47};
48
49/* Diff command specific HPP columns. */
50enum {
51 PERF_HPP_DIFF__BASELINE,
52 PERF_HPP_DIFF__PERIOD,
53 PERF_HPP_DIFF__PERIOD_BASELINE,
54 PERF_HPP_DIFF__DELTA,
55 PERF_HPP_DIFF__RATIO,
56 PERF_HPP_DIFF__WEIGHTED_DIFF,
57 PERF_HPP_DIFF__FORMULA,
58 PERF_HPP_DIFF__DELTA_ABS,
59 PERF_HPP_DIFF__CYCLES,
60 PERF_HPP_DIFF__CYCLES_HIST,
61
62 PERF_HPP_DIFF__MAX_INDEX
63};
64
65struct diff_hpp_fmt {
66 struct perf_hpp_fmt fmt;
67 int idx;
68 char *header;
69 int header_width;
70};
71
72struct data__file {
73 struct perf_session *session;
74 struct perf_data data;
75 int idx;
76 struct hists *hists;
77 struct evlist_streams *evlist_streams;
78 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
79};
80
81static struct data__file *data__files;
82static int data__files_cnt;
83
84#define data__for_each_file_start(i, d, s) \
85 for (i = s, d = &data__files[s]; \
86 i < data__files_cnt; \
87 i++, d = &data__files[i])
88
89#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
90#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
91
92static bool force;
93static bool show_period;
94static bool show_formula;
95static bool show_baseline_only;
96static bool cycles_hist;
97static unsigned int sort_compute = 1;
98
99static s64 compute_wdiff_w1;
100static s64 compute_wdiff_w2;
101
102static const char *cpu_list;
103static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
104
105enum {
106 COMPUTE_DELTA,
107 COMPUTE_RATIO,
108 COMPUTE_WEIGHTED_DIFF,
109 COMPUTE_DELTA_ABS,
110 COMPUTE_CYCLES,
111 COMPUTE_MAX,
112 COMPUTE_STREAM, /* After COMPUTE_MAX to avoid use current compute arrays */
113};
114
115const char *compute_names[COMPUTE_MAX] = {
116 [COMPUTE_DELTA] = "delta",
117 [COMPUTE_DELTA_ABS] = "delta-abs",
118 [COMPUTE_RATIO] = "ratio",
119 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
120 [COMPUTE_CYCLES] = "cycles",
121};
122
123static int compute = COMPUTE_DELTA_ABS;
124
125static int compute_2_hpp[COMPUTE_MAX] = {
126 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
127 [COMPUTE_DELTA_ABS] = PERF_HPP_DIFF__DELTA_ABS,
128 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
129 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
130 [COMPUTE_CYCLES] = PERF_HPP_DIFF__CYCLES,
131};
132
133#define MAX_COL_WIDTH 70
134
135static struct header_column {
136 const char *name;
137 int width;
138} columns[PERF_HPP_DIFF__MAX_INDEX] = {
139 [PERF_HPP_DIFF__BASELINE] = {
140 .name = "Baseline",
141 },
142 [PERF_HPP_DIFF__PERIOD] = {
143 .name = "Period",
144 .width = 14,
145 },
146 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
147 .name = "Base period",
148 .width = 14,
149 },
150 [PERF_HPP_DIFF__DELTA] = {
151 .name = "Delta",
152 .width = 7,
153 },
154 [PERF_HPP_DIFF__DELTA_ABS] = {
155 .name = "Delta Abs",
156 .width = 7,
157 },
158 [PERF_HPP_DIFF__RATIO] = {
159 .name = "Ratio",
160 .width = 14,
161 },
162 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
163 .name = "Weighted diff",
164 .width = 14,
165 },
166 [PERF_HPP_DIFF__FORMULA] = {
167 .name = "Formula",
168 .width = MAX_COL_WIDTH,
169 },
170 [PERF_HPP_DIFF__CYCLES] = {
171 .name = "[Program Block Range] Cycles Diff",
172 .width = 70,
173 },
174 [PERF_HPP_DIFF__CYCLES_HIST] = {
175 .name = "stddev/Hist",
176 .width = NUM_SPARKS + 9,
177 }
178};
179
180static int setup_compute_opt_wdiff(char *opt)
181{
182 char *w1_str = opt;
183 char *w2_str;
184
185 int ret = -EINVAL;
186
187 if (!opt)
188 goto out;
189
190 w2_str = strchr(opt, ',');
191 if (!w2_str)
192 goto out;
193
194 *w2_str++ = 0x0;
195 if (!*w2_str)
196 goto out;
197
198 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
199 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
200
201 if (!compute_wdiff_w1 || !compute_wdiff_w2)
202 goto out;
203
204 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
205 compute_wdiff_w1, compute_wdiff_w2);
206
207 ret = 0;
208
209 out:
210 if (ret)
211 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
212
213 return ret;
214}
215
216static int setup_compute_opt(char *opt)
217{
218 if (compute == COMPUTE_WEIGHTED_DIFF)
219 return setup_compute_opt_wdiff(opt);
220
221 if (opt) {
222 pr_err("Failed: extra option specified '%s'", opt);
223 return -EINVAL;
224 }
225
226 return 0;
227}
228
229static int setup_compute(const struct option *opt, const char *str,
230 int unset __maybe_unused)
231{
232 int *cp = (int *) opt->value;
233 char *cstr = (char *) str;
234 char buf[50];
235 unsigned i;
236 char *option;
237
238 if (!str) {
239 *cp = COMPUTE_DELTA;
240 return 0;
241 }
242
243 option = strchr(str, ':');
244 if (option) {
245 unsigned len = option++ - str;
246
247 /*
248 * The str data are not writeable, so we need
249 * to use another buffer.
250 */
251
252 /* No option value is longer. */
253 if (len >= sizeof(buf))
254 return -EINVAL;
255
256 strncpy(buf, str, len);
257 buf[len] = 0x0;
258 cstr = buf;
259 }
260
261 for (i = 0; i < COMPUTE_MAX; i++)
262 if (!strcmp(cstr, compute_names[i])) {
263 *cp = i;
264 return setup_compute_opt(option);
265 }
266
267 pr_err("Failed: '%s' is not computation method "
268 "(use 'delta','ratio' or 'wdiff')\n", str);
269 return -EINVAL;
270}
271
272static double period_percent(struct hist_entry *he, u64 period)
273{
274 u64 total = hists__total_period(he->hists);
275
276 return (period * 100.0) / total;
277}
278
279static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
280{
281 double old_percent = period_percent(he, he->stat.period);
282 double new_percent = period_percent(pair, pair->stat.period);
283
284 pair->diff.period_ratio_delta = new_percent - old_percent;
285 pair->diff.computed = true;
286 return pair->diff.period_ratio_delta;
287}
288
289static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
290{
291 double old_period = he->stat.period ?: 1;
292 double new_period = pair->stat.period;
293
294 pair->diff.computed = true;
295 pair->diff.period_ratio = new_period / old_period;
296 return pair->diff.period_ratio;
297}
298
299static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
300{
301 u64 old_period = he->stat.period;
302 u64 new_period = pair->stat.period;
303
304 pair->diff.computed = true;
305 pair->diff.wdiff = new_period * compute_wdiff_w2 -
306 old_period * compute_wdiff_w1;
307
308 return pair->diff.wdiff;
309}
310
311static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
312 char *buf, size_t size)
313{
314 u64 he_total = he->hists->stats.total_period;
315 u64 pair_total = pair->hists->stats.total_period;
316
317 if (symbol_conf.filter_relative) {
318 he_total = he->hists->stats.total_non_filtered_period;
319 pair_total = pair->hists->stats.total_non_filtered_period;
320 }
321 return scnprintf(buf, size,
322 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
323 "(%" PRIu64 " * 100 / %" PRIu64 ")",
324 pair->stat.period, pair_total,
325 he->stat.period, he_total);
326}
327
328static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
329 char *buf, size_t size)
330{
331 double old_period = he->stat.period;
332 double new_period = pair->stat.period;
333
334 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
335}
336
337static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
338 char *buf, size_t size)
339{
340 u64 old_period = he->stat.period;
341 u64 new_period = pair->stat.period;
342
343 return scnprintf(buf, size,
344 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
345 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
346}
347
348static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
349 char *buf, size_t size)
350{
351 switch (compute) {
352 case COMPUTE_DELTA:
353 case COMPUTE_DELTA_ABS:
354 return formula_delta(he, pair, buf, size);
355 case COMPUTE_RATIO:
356 return formula_ratio(he, pair, buf, size);
357 case COMPUTE_WEIGHTED_DIFF:
358 return formula_wdiff(he, pair, buf, size);
359 default:
360 BUG_ON(1);
361 }
362
363 return -1;
364}
365
366static void *block_hist_zalloc(size_t size)
367{
368 struct block_hist *bh;
369
370 bh = zalloc(size + sizeof(*bh));
371 if (!bh)
372 return NULL;
373
374 return &bh->he;
375}
376
377static void block_hist_free(void *he)
378{
379 struct block_hist *bh;
380
381 bh = container_of(he, struct block_hist, he);
382 hists__delete_entries(&bh->block_hists);
383 free(bh);
384}
385
386struct hist_entry_ops block_hist_ops = {
387 .new = block_hist_zalloc,
388 .free = block_hist_free,
389};
390
391static int diff__process_sample_event(const struct perf_tool *tool,
392 union perf_event *event,
393 struct perf_sample *sample,
394 struct evsel *evsel,
395 struct machine *machine)
396{
397 struct perf_diff *pdiff = container_of(tool, struct perf_diff, tool);
398 struct addr_location al;
399 struct hists *hists = evsel__hists(evsel);
400 struct hist_entry_iter iter = {
401 .evsel = evsel,
402 .sample = sample,
403 .ops = &hist_iter_normal,
404 };
405 int ret = -1;
406
407 if (perf_time__ranges_skip_sample(pdiff->ptime_range, pdiff->range_num,
408 sample->time)) {
409 return 0;
410 }
411
412 addr_location__init(&al);
413 if (machine__resolve(machine, &al, sample) < 0) {
414 pr_warning("problem processing %d event, skipping it.\n",
415 event->header.type);
416 ret = -1;
417 goto out;
418 }
419
420 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) {
421 ret = 0;
422 goto out;
423 }
424
425 switch (compute) {
426 case COMPUTE_CYCLES:
427 if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
428 NULL, NULL, NULL, sample, true)) {
429 pr_warning("problem incrementing symbol period, "
430 "skipping event\n");
431 goto out;
432 }
433
434 hist__account_cycles(sample->branch_stack, &al, sample,
435 false, NULL, evsel);
436 break;
437
438 case COMPUTE_STREAM:
439 if (hist_entry_iter__add(&iter, &al, PERF_MAX_STACK_DEPTH,
440 NULL)) {
441 pr_debug("problem adding hist entry, skipping event\n");
442 goto out;
443 }
444 break;
445
446 default:
447 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, NULL, sample,
448 true)) {
449 pr_warning("problem incrementing symbol period, "
450 "skipping event\n");
451 goto out;
452 }
453 }
454
455 /*
456 * The total_period is updated here before going to the output
457 * tree since normally only the baseline hists will call
458 * hists__output_resort() and precompute needs the total
459 * period in order to sort entries by percentage delta.
460 */
461 hists->stats.total_period += sample->period;
462 if (!al.filtered)
463 hists->stats.total_non_filtered_period += sample->period;
464 ret = 0;
465out:
466 addr_location__exit(&al);
467 return ret;
468}
469
470static struct perf_diff pdiff;
471
472static struct evsel *evsel_match(struct evsel *evsel, struct evlist *evlist)
473{
474 struct evsel *e;
475
476 evlist__for_each_entry(evlist, e) {
477 if ((evsel->core.attr.type == e->core.attr.type) &&
478 (evsel->core.attr.config == e->core.attr.config))
479 return e;
480 }
481
482 return NULL;
483}
484
485static void evlist__collapse_resort(struct evlist *evlist)
486{
487 struct evsel *evsel;
488
489 evlist__for_each_entry(evlist, evsel) {
490 struct hists *hists = evsel__hists(evsel);
491
492 hists__collapse_resort(hists, NULL);
493 }
494}
495
496static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
497{
498 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
499 void *ptr = dfmt - dfmt->idx;
500 struct data__file *d = container_of(ptr, struct data__file, fmt);
501
502 return d;
503}
504
505static struct hist_entry*
506get_pair_data(struct hist_entry *he, struct data__file *d)
507{
508 if (hist_entry__has_pairs(he)) {
509 struct hist_entry *pair;
510
511 list_for_each_entry(pair, &he->pairs.head, pairs.node)
512 if (pair->hists == d->hists)
513 return pair;
514 }
515
516 return NULL;
517}
518
519static struct hist_entry*
520get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
521{
522 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
523
524 return get_pair_data(he, d);
525}
526
527static void hists__baseline_only(struct hists *hists)
528{
529 struct rb_root_cached *root;
530 struct rb_node *next;
531
532 if (hists__has(hists, need_collapse))
533 root = &hists->entries_collapsed;
534 else
535 root = hists->entries_in;
536
537 next = rb_first_cached(root);
538 while (next != NULL) {
539 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
540
541 next = rb_next(&he->rb_node_in);
542 if (!hist_entry__next_pair(he)) {
543 rb_erase_cached(&he->rb_node_in, root);
544 hist_entry__delete(he);
545 }
546 }
547}
548
549static int64_t block_cycles_diff_cmp(struct hist_entry *left,
550 struct hist_entry *right)
551{
552 bool pairs_left = hist_entry__has_pairs(left);
553 bool pairs_right = hist_entry__has_pairs(right);
554 s64 l, r;
555
556 if (!pairs_left && !pairs_right)
557 return 0;
558
559 l = llabs(left->diff.cycles);
560 r = llabs(right->diff.cycles);
561 return r - l;
562}
563
564static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused,
565 struct hist_entry *left, struct hist_entry *right)
566{
567 return block_cycles_diff_cmp(right, left);
568}
569
570static void init_block_hist(struct block_hist *bh)
571{
572 __hists__init(&bh->block_hists, &bh->block_list);
573 perf_hpp_list__init(&bh->block_list);
574
575 INIT_LIST_HEAD(&bh->block_fmt.list);
576 INIT_LIST_HEAD(&bh->block_fmt.sort_list);
577 bh->block_fmt.cmp = block_info__cmp;
578 bh->block_fmt.sort = block_sort;
579 perf_hpp_list__register_sort_field(&bh->block_list,
580 &bh->block_fmt);
581 bh->valid = true;
582}
583
584static struct hist_entry *get_block_pair(struct hist_entry *he,
585 struct hists *hists_pair)
586{
587 struct rb_root_cached *root = hists_pair->entries_in;
588 struct rb_node *next = rb_first_cached(root);
589 int64_t cmp;
590
591 while (next != NULL) {
592 struct hist_entry *he_pair = rb_entry(next, struct hist_entry,
593 rb_node_in);
594
595 next = rb_next(&he_pair->rb_node_in);
596
597 cmp = __block_info__cmp(he_pair, he);
598 if (!cmp)
599 return he_pair;
600 }
601
602 return NULL;
603}
604
605static void init_spark_values(unsigned long *svals, int num)
606{
607 for (int i = 0; i < num; i++)
608 svals[i] = 0;
609}
610
611static void update_spark_value(unsigned long *svals, int num,
612 struct stats *stats, u64 val)
613{
614 int n = stats->n;
615
616 if (n < num)
617 svals[n] = val;
618}
619
620static void compute_cycles_diff(struct hist_entry *he,
621 struct hist_entry *pair)
622{
623 pair->diff.computed = true;
624 if (pair->block_info->num && he->block_info->num) {
625 pair->diff.cycles =
626 pair->block_info->cycles_aggr / pair->block_info->num_aggr -
627 he->block_info->cycles_aggr / he->block_info->num_aggr;
628
629 if (!cycles_hist)
630 return;
631
632 init_stats(&pair->diff.stats);
633 init_spark_values(pair->diff.svals, NUM_SPARKS);
634
635 for (int i = 0; i < pair->block_info->num; i++) {
636 u64 val;
637
638 if (i >= he->block_info->num || i >= NUM_SPARKS)
639 break;
640
641 val = llabs(pair->block_info->cycles_spark[i] -
642 he->block_info->cycles_spark[i]);
643
644 update_spark_value(pair->diff.svals, NUM_SPARKS,
645 &pair->diff.stats, val);
646 update_stats(&pair->diff.stats, val);
647 }
648 }
649}
650
651static void block_hists_match(struct hists *hists_base,
652 struct hists *hists_pair)
653{
654 struct rb_root_cached *root = hists_base->entries_in;
655 struct rb_node *next = rb_first_cached(root);
656
657 while (next != NULL) {
658 struct hist_entry *he = rb_entry(next, struct hist_entry,
659 rb_node_in);
660 struct hist_entry *pair = get_block_pair(he, hists_pair);
661
662 next = rb_next(&he->rb_node_in);
663
664 if (pair) {
665 hist_entry__add_pair(pair, he);
666 compute_cycles_diff(he, pair);
667 }
668 }
669}
670
671static void hists__precompute(struct hists *hists)
672{
673 struct rb_root_cached *root;
674 struct rb_node *next;
675
676 if (hists__has(hists, need_collapse))
677 root = &hists->entries_collapsed;
678 else
679 root = hists->entries_in;
680
681 next = rb_first_cached(root);
682 while (next != NULL) {
683 struct block_hist *bh, *pair_bh;
684 struct hist_entry *he, *pair;
685 struct data__file *d;
686 int i;
687
688 he = rb_entry(next, struct hist_entry, rb_node_in);
689 next = rb_next(&he->rb_node_in);
690
691 if (compute == COMPUTE_CYCLES) {
692 bh = container_of(he, struct block_hist, he);
693 init_block_hist(bh);
694 block_info__process_sym(he, bh, NULL, 0, 0);
695 }
696
697 data__for_each_file_new(i, d) {
698 pair = get_pair_data(he, d);
699 if (!pair)
700 continue;
701
702 switch (compute) {
703 case COMPUTE_DELTA:
704 case COMPUTE_DELTA_ABS:
705 compute_delta(he, pair);
706 break;
707 case COMPUTE_RATIO:
708 compute_ratio(he, pair);
709 break;
710 case COMPUTE_WEIGHTED_DIFF:
711 compute_wdiff(he, pair);
712 break;
713 case COMPUTE_CYCLES:
714 pair_bh = container_of(pair, struct block_hist,
715 he);
716 init_block_hist(pair_bh);
717 block_info__process_sym(pair, pair_bh, NULL, 0, 0);
718
719 bh = container_of(he, struct block_hist, he);
720
721 if (bh->valid && pair_bh->valid) {
722 block_hists_match(&bh->block_hists,
723 &pair_bh->block_hists);
724 hists__output_resort(&pair_bh->block_hists,
725 NULL);
726 }
727 break;
728 default:
729 BUG_ON(1);
730 }
731 }
732 }
733}
734
735static int64_t cmp_doubles(double l, double r)
736{
737 if (l > r)
738 return -1;
739 else if (l < r)
740 return 1;
741 else
742 return 0;
743}
744
745static int64_t
746__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
747 int c)
748{
749 switch (c) {
750 case COMPUTE_DELTA:
751 {
752 double l = left->diff.period_ratio_delta;
753 double r = right->diff.period_ratio_delta;
754
755 return cmp_doubles(l, r);
756 }
757 case COMPUTE_DELTA_ABS:
758 {
759 double l = fabs(left->diff.period_ratio_delta);
760 double r = fabs(right->diff.period_ratio_delta);
761
762 return cmp_doubles(l, r);
763 }
764 case COMPUTE_RATIO:
765 {
766 double l = left->diff.period_ratio;
767 double r = right->diff.period_ratio;
768
769 return cmp_doubles(l, r);
770 }
771 case COMPUTE_WEIGHTED_DIFF:
772 {
773 s64 l = left->diff.wdiff;
774 s64 r = right->diff.wdiff;
775
776 return r - l;
777 }
778 default:
779 BUG_ON(1);
780 }
781
782 return 0;
783}
784
785static int64_t
786hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
787 int c, int sort_idx)
788{
789 bool pairs_left = hist_entry__has_pairs(left);
790 bool pairs_right = hist_entry__has_pairs(right);
791 struct hist_entry *p_right, *p_left;
792
793 if (!pairs_left && !pairs_right)
794 return 0;
795
796 if (!pairs_left || !pairs_right)
797 return pairs_left ? -1 : 1;
798
799 p_left = get_pair_data(left, &data__files[sort_idx]);
800 p_right = get_pair_data(right, &data__files[sort_idx]);
801
802 if (!p_left && !p_right)
803 return 0;
804
805 if (!p_left || !p_right)
806 return p_left ? -1 : 1;
807
808 /*
809 * We have 2 entries of same kind, let's
810 * make the data comparison.
811 */
812 return __hist_entry__cmp_compute(p_left, p_right, c);
813}
814
815static int64_t
816hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
817 int c, int sort_idx)
818{
819 struct hist_entry *p_right, *p_left;
820
821 p_left = get_pair_data(left, &data__files[sort_idx]);
822 p_right = get_pair_data(right, &data__files[sort_idx]);
823
824 if (!p_left && !p_right)
825 return 0;
826
827 if (!p_left || !p_right)
828 return p_left ? -1 : 1;
829
830 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
831 /*
832 * The delta can be computed without the baseline, but
833 * others are not. Put those entries which have no
834 * values below.
835 */
836 if (left->dummy && right->dummy)
837 return 0;
838
839 if (left->dummy || right->dummy)
840 return left->dummy ? 1 : -1;
841 }
842
843 return __hist_entry__cmp_compute(p_left, p_right, c);
844}
845
846static int64_t
847hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
848 struct hist_entry *left __maybe_unused,
849 struct hist_entry *right __maybe_unused)
850{
851 return 0;
852}
853
854static int64_t
855hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
856 struct hist_entry *left, struct hist_entry *right)
857{
858 if (left->stat.period == right->stat.period)
859 return 0;
860 return left->stat.period > right->stat.period ? 1 : -1;
861}
862
863static int64_t
864hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
865 struct hist_entry *left, struct hist_entry *right)
866{
867 struct data__file *d = fmt_to_data_file(fmt);
868
869 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
870}
871
872static int64_t
873hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
874 struct hist_entry *left, struct hist_entry *right)
875{
876 struct data__file *d = fmt_to_data_file(fmt);
877
878 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
879}
880
881static int64_t
882hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
883 struct hist_entry *left, struct hist_entry *right)
884{
885 struct data__file *d = fmt_to_data_file(fmt);
886
887 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
888}
889
890static int64_t
891hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
892 struct hist_entry *left, struct hist_entry *right)
893{
894 struct data__file *d = fmt_to_data_file(fmt);
895
896 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
897}
898
899static int64_t
900hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
901 struct hist_entry *left, struct hist_entry *right)
902{
903 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
904 sort_compute);
905}
906
907static int64_t
908hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
909 struct hist_entry *left, struct hist_entry *right)
910{
911 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
912 sort_compute);
913}
914
915static int64_t
916hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
917 struct hist_entry *left, struct hist_entry *right)
918{
919 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
920 sort_compute);
921}
922
923static int64_t
924hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
925 struct hist_entry *left, struct hist_entry *right)
926{
927 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
928 sort_compute);
929}
930
931static void hists__process(struct hists *hists)
932{
933 if (show_baseline_only)
934 hists__baseline_only(hists);
935
936 hists__precompute(hists);
937 hists__output_resort(hists, NULL);
938
939 if (compute == COMPUTE_CYCLES)
940 symbol_conf.report_block = true;
941
942 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
943 !symbol_conf.use_callchain);
944}
945
946static void data__fprintf(void)
947{
948 struct data__file *d;
949 int i;
950
951 fprintf(stdout, "# Data files:\n");
952
953 data__for_each_file(i, d)
954 fprintf(stdout, "# [%d] %s %s\n",
955 d->idx, d->data.path,
956 !d->idx ? "(Baseline)" : "");
957
958 fprintf(stdout, "#\n");
959}
960
961static void data_process(void)
962{
963 struct evlist *evlist_base = data__files[0].session->evlist;
964 struct evsel *evsel_base;
965 bool first = true;
966
967 evlist__for_each_entry(evlist_base, evsel_base) {
968 struct hists *hists_base = evsel__hists(evsel_base);
969 struct data__file *d;
970 int i;
971
972 data__for_each_file_new(i, d) {
973 struct evlist *evlist = d->session->evlist;
974 struct evsel *evsel;
975 struct hists *hists;
976
977 evsel = evsel_match(evsel_base, evlist);
978 if (!evsel)
979 continue;
980
981 hists = evsel__hists(evsel);
982 d->hists = hists;
983
984 hists__match(hists_base, hists);
985
986 if (!show_baseline_only)
987 hists__link(hists_base, hists);
988 }
989
990 if (!quiet) {
991 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
992 evsel__name(evsel_base));
993 }
994
995 first = false;
996
997 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
998 data__fprintf();
999
1000 /* Don't sort callchain for perf diff */
1001 evsel__reset_sample_bit(evsel_base, CALLCHAIN);
1002
1003 hists__process(hists_base);
1004 }
1005}
1006
1007static int process_base_stream(struct data__file *data_base,
1008 struct data__file *data_pair,
1009 const char *title __maybe_unused)
1010{
1011 struct evlist *evlist_base = data_base->session->evlist;
1012 struct evlist *evlist_pair = data_pair->session->evlist;
1013 struct evsel *evsel_base, *evsel_pair;
1014 struct evsel_streams *es_base, *es_pair;
1015
1016 evlist__for_each_entry(evlist_base, evsel_base) {
1017 evsel_pair = evsel_match(evsel_base, evlist_pair);
1018 if (!evsel_pair)
1019 continue;
1020
1021 es_base = evsel_streams__entry(data_base->evlist_streams,
1022 evsel_base->core.idx);
1023 if (!es_base)
1024 return -1;
1025
1026 es_pair = evsel_streams__entry(data_pair->evlist_streams,
1027 evsel_pair->core.idx);
1028 if (!es_pair)
1029 return -1;
1030
1031 evsel_streams__match(es_base, es_pair);
1032 evsel_streams__report(es_base, es_pair);
1033 }
1034
1035 return 0;
1036}
1037
1038static void stream_process(void)
1039{
1040 /*
1041 * Stream comparison only supports two data files.
1042 * perf.data.old and perf.data. data__files[0] is perf.data.old,
1043 * data__files[1] is perf.data.
1044 */
1045 process_base_stream(&data__files[0], &data__files[1],
1046 "# Output based on old perf data:\n#\n");
1047}
1048
1049static void data__free(struct data__file *d)
1050{
1051 int col;
1052
1053 if (d->evlist_streams)
1054 evlist_streams__delete(d->evlist_streams);
1055
1056 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
1057 struct diff_hpp_fmt *fmt = &d->fmt[col];
1058
1059 zfree(&fmt->header);
1060 }
1061}
1062
1063static int abstime_str_dup(char **pstr)
1064{
1065 char *str = NULL;
1066
1067 if (pdiff.time_str && strchr(pdiff.time_str, ':')) {
1068 str = strdup(pdiff.time_str);
1069 if (!str)
1070 return -ENOMEM;
1071 }
1072
1073 *pstr = str;
1074 return 0;
1075}
1076
1077static int parse_absolute_time(struct data__file *d, char **pstr)
1078{
1079 char *p = *pstr;
1080 int ret;
1081
1082 /*
1083 * Absolute timestamp for one file has the format: a.b,c.d
1084 * For multiple files, the format is: a.b,c.d:a.b,c.d
1085 */
1086 p = strchr(*pstr, ':');
1087 if (p) {
1088 if (p == *pstr) {
1089 pr_err("Invalid time string\n");
1090 return -EINVAL;
1091 }
1092
1093 *p = 0;
1094 p++;
1095 if (*p == 0) {
1096 pr_err("Invalid time string\n");
1097 return -EINVAL;
1098 }
1099 }
1100
1101 ret = perf_time__parse_for_ranges(*pstr, d->session,
1102 &pdiff.ptime_range,
1103 &pdiff.range_size,
1104 &pdiff.range_num);
1105 if (ret < 0)
1106 return ret;
1107
1108 if (!p || *p == 0)
1109 *pstr = NULL;
1110 else
1111 *pstr = p;
1112
1113 return ret;
1114}
1115
1116static int parse_percent_time(struct data__file *d)
1117{
1118 int ret;
1119
1120 ret = perf_time__parse_for_ranges(pdiff.time_str, d->session,
1121 &pdiff.ptime_range,
1122 &pdiff.range_size,
1123 &pdiff.range_num);
1124 return ret;
1125}
1126
1127static int parse_time_str(struct data__file *d, char *abstime_ostr,
1128 char **pabstime_tmp)
1129{
1130 int ret = 0;
1131
1132 if (abstime_ostr)
1133 ret = parse_absolute_time(d, pabstime_tmp);
1134 else if (pdiff.time_str)
1135 ret = parse_percent_time(d);
1136
1137 return ret;
1138}
1139
1140static int check_file_brstack(void)
1141{
1142 struct data__file *d;
1143 bool has_br_stack;
1144 int i;
1145
1146 data__for_each_file(i, d) {
1147 d->session = perf_session__new(&d->data, &pdiff.tool);
1148 if (IS_ERR(d->session)) {
1149 pr_err("Failed to open %s\n", d->data.path);
1150 return PTR_ERR(d->session);
1151 }
1152
1153 has_br_stack = perf_header__has_feat(&d->session->header,
1154 HEADER_BRANCH_STACK);
1155 perf_session__delete(d->session);
1156 if (!has_br_stack)
1157 return 0;
1158 }
1159
1160 /* Set only all files having branch stacks */
1161 pdiff.has_br_stack = true;
1162 return 0;
1163}
1164
1165static int __cmd_diff(void)
1166{
1167 struct data__file *d;
1168 int ret, i;
1169 char *abstime_ostr, *abstime_tmp;
1170
1171 ret = abstime_str_dup(&abstime_ostr);
1172 if (ret)
1173 return ret;
1174
1175 abstime_tmp = abstime_ostr;
1176 ret = -EINVAL;
1177
1178 data__for_each_file(i, d) {
1179 d->session = perf_session__new(&d->data, &pdiff.tool);
1180 if (IS_ERR(d->session)) {
1181 ret = PTR_ERR(d->session);
1182 pr_err("Failed to open %s\n", d->data.path);
1183 goto out_delete;
1184 }
1185
1186 if (pdiff.time_str) {
1187 ret = parse_time_str(d, abstime_ostr, &abstime_tmp);
1188 if (ret < 0)
1189 goto out_delete;
1190 }
1191
1192 if (cpu_list) {
1193 ret = perf_session__cpu_bitmap(d->session, cpu_list,
1194 cpu_bitmap);
1195 if (ret < 0)
1196 goto out_delete;
1197 }
1198
1199 ret = perf_session__process_events(d->session);
1200 if (ret) {
1201 pr_err("Failed to process %s\n", d->data.path);
1202 goto out_delete;
1203 }
1204
1205 evlist__collapse_resort(d->session->evlist);
1206
1207 if (pdiff.ptime_range)
1208 zfree(&pdiff.ptime_range);
1209
1210 if (compute == COMPUTE_STREAM) {
1211 d->evlist_streams = evlist__create_streams(
1212 d->session->evlist, 5);
1213 if (!d->evlist_streams) {
1214 ret = -ENOMEM;
1215 goto out_delete;
1216 }
1217 }
1218 }
1219
1220 if (compute == COMPUTE_STREAM)
1221 stream_process();
1222 else
1223 data_process();
1224
1225 out_delete:
1226 data__for_each_file(i, d) {
1227 if (!IS_ERR(d->session))
1228 perf_session__delete(d->session);
1229 data__free(d);
1230 }
1231
1232 free(data__files);
1233
1234 if (pdiff.ptime_range)
1235 zfree(&pdiff.ptime_range);
1236
1237 if (abstime_ostr)
1238 free(abstime_ostr);
1239
1240 return ret;
1241}
1242
1243static const char * const diff_usage[] = {
1244 "perf diff [<options>] [old_file] [new_file]",
1245 NULL,
1246};
1247
1248static const struct option options[] = {
1249 OPT_INCR('v', "verbose", &verbose,
1250 "be more verbose (show symbol address, etc)"),
1251 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any warnings or messages"),
1252 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
1253 "Show only items with match in baseline"),
1254 OPT_CALLBACK('c', "compute", &compute,
1255 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs),cycles",
1256 "Entries differential computation selection",
1257 setup_compute),
1258 OPT_BOOLEAN('p', "period", &show_period,
1259 "Show period values."),
1260 OPT_BOOLEAN('F', "formula", &show_formula,
1261 "Show formula."),
1262 OPT_BOOLEAN(0, "cycles-hist", &cycles_hist,
1263 "Show cycles histogram and standard deviation "
1264 "- WARNING: use only with -c cycles."),
1265 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1266 "dump raw trace in ASCII"),
1267 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
1268 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1269 "file", "kallsyms pathname"),
1270 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
1271 "load module symbols - WARNING: use only with -k and LIVE kernel"),
1272 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1273 "only consider symbols in these dsos"),
1274 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1275 "only consider symbols in these comms"),
1276 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1277 "only consider these symbols"),
1278 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1279 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1280 " Please refer the man page for the complete list."),
1281 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
1282 "separator for columns, no spaces will be added between "
1283 "columns '.' is reserved."),
1284 OPT_CALLBACK(0, "symfs", NULL, "directory",
1285 "Look for files with symbols relative to this directory",
1286 symbol__config_symfs),
1287 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
1288 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1289 "How to display percentage of filtered entries", parse_filter_percentage),
1290 OPT_STRING(0, "time", &pdiff.time_str, "str",
1291 "Time span (time percent or absolute timestamp)"),
1292 OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1293 OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
1294 "only consider symbols in these pids"),
1295 OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
1296 "only consider symbols in these tids"),
1297 OPT_BOOLEAN(0, "stream", &pdiff.stream,
1298 "Enable hot streams comparison."),
1299 OPT_END()
1300};
1301
1302static double baseline_percent(struct hist_entry *he)
1303{
1304 u64 total = hists__total_period(he->hists);
1305
1306 return 100.0 * he->stat.period / total;
1307}
1308
1309static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
1310 struct perf_hpp *hpp, struct hist_entry *he)
1311{
1312 struct diff_hpp_fmt *dfmt =
1313 container_of(fmt, struct diff_hpp_fmt, fmt);
1314 double percent = baseline_percent(he);
1315 char pfmt[20] = " ";
1316
1317 if (!he->dummy) {
1318 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
1319 return percent_color_snprintf(hpp->buf, hpp->size,
1320 pfmt, percent);
1321 } else
1322 return scnprintf(hpp->buf, hpp->size, "%*s",
1323 dfmt->header_width, pfmt);
1324}
1325
1326static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
1327{
1328 double percent = baseline_percent(he);
1329 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
1330 int ret = 0;
1331
1332 if (!he->dummy)
1333 ret = scnprintf(buf, size, fmt, percent);
1334
1335 return ret;
1336}
1337
1338static int cycles_printf(struct hist_entry *he, struct hist_entry *pair,
1339 struct perf_hpp *hpp, int width)
1340{
1341 struct block_hist *bh = container_of(he, struct block_hist, he);
1342 struct block_hist *bh_pair = container_of(pair, struct block_hist, he);
1343 struct hist_entry *block_he;
1344 struct block_info *bi;
1345 char buf[128];
1346 char *start_line, *end_line;
1347
1348 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1349 if (!block_he) {
1350 hpp->skip = true;
1351 return 0;
1352 }
1353
1354 /*
1355 * Avoid printing the warning "addr2line_init failed for ..."
1356 */
1357 symbol_conf.disable_add2line_warn = true;
1358
1359 bi = block_he->block_info;
1360
1361 start_line = map__srcline(he->ms.map, bi->sym->start + bi->start,
1362 he->ms.sym);
1363
1364 end_line = map__srcline(he->ms.map, bi->sym->start + bi->end,
1365 he->ms.sym);
1366
1367 if (start_line != SRCLINE_UNKNOWN &&
1368 end_line != SRCLINE_UNKNOWN) {
1369 scnprintf(buf, sizeof(buf), "[%s -> %s] %4ld",
1370 start_line, end_line, block_he->diff.cycles);
1371 } else {
1372 scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld",
1373 bi->start, bi->end, block_he->diff.cycles);
1374 }
1375
1376 zfree_srcline(&start_line);
1377 zfree_srcline(&end_line);
1378
1379 return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
1380}
1381
1382static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
1383 struct perf_hpp *hpp, struct hist_entry *he,
1384 int comparison_method)
1385{
1386 struct diff_hpp_fmt *dfmt =
1387 container_of(fmt, struct diff_hpp_fmt, fmt);
1388 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1389 double diff;
1390 s64 wdiff;
1391 char pfmt[20] = " ";
1392
1393 if (!pair) {
1394 if (comparison_method == COMPUTE_CYCLES) {
1395 struct block_hist *bh;
1396
1397 bh = container_of(he, struct block_hist, he);
1398 if (bh->block_idx)
1399 hpp->skip = true;
1400 }
1401
1402 goto no_print;
1403 }
1404
1405 switch (comparison_method) {
1406 case COMPUTE_DELTA:
1407 if (pair->diff.computed)
1408 diff = pair->diff.period_ratio_delta;
1409 else
1410 diff = compute_delta(he, pair);
1411
1412 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
1413 return percent_color_snprintf(hpp->buf, hpp->size,
1414 pfmt, diff);
1415 case COMPUTE_RATIO:
1416 if (he->dummy)
1417 goto dummy_print;
1418 if (pair->diff.computed)
1419 diff = pair->diff.period_ratio;
1420 else
1421 diff = compute_ratio(he, pair);
1422
1423 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
1424 return value_color_snprintf(hpp->buf, hpp->size,
1425 pfmt, diff);
1426 case COMPUTE_WEIGHTED_DIFF:
1427 if (he->dummy)
1428 goto dummy_print;
1429 if (pair->diff.computed)
1430 wdiff = pair->diff.wdiff;
1431 else
1432 wdiff = compute_wdiff(he, pair);
1433
1434 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
1435 return color_snprintf(hpp->buf, hpp->size,
1436 get_percent_color(wdiff),
1437 pfmt, wdiff);
1438 case COMPUTE_CYCLES:
1439 return cycles_printf(he, pair, hpp, dfmt->header_width);
1440 default:
1441 BUG_ON(1);
1442 }
1443dummy_print:
1444 return scnprintf(hpp->buf, hpp->size, "%*s",
1445 dfmt->header_width, "N/A");
1446no_print:
1447 return scnprintf(hpp->buf, hpp->size, "%*s",
1448 dfmt->header_width, pfmt);
1449}
1450
1451static int hpp__color_delta(struct perf_hpp_fmt *fmt,
1452 struct perf_hpp *hpp, struct hist_entry *he)
1453{
1454 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
1455}
1456
1457static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
1458 struct perf_hpp *hpp, struct hist_entry *he)
1459{
1460 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
1461}
1462
1463static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
1464 struct perf_hpp *hpp, struct hist_entry *he)
1465{
1466 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
1467}
1468
1469static int hpp__color_cycles(struct perf_hpp_fmt *fmt,
1470 struct perf_hpp *hpp, struct hist_entry *he)
1471{
1472 return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);
1473}
1474
1475static int all_zero(unsigned long *vals, int len)
1476{
1477 int i;
1478
1479 for (i = 0; i < len; i++)
1480 if (vals[i] != 0)
1481 return 0;
1482 return 1;
1483}
1484
1485static int print_cycles_spark(char *bf, int size, unsigned long *svals, u64 n)
1486{
1487 int printed;
1488
1489 if (n <= 1)
1490 return 0;
1491
1492 if (n > NUM_SPARKS)
1493 n = NUM_SPARKS;
1494 if (all_zero(svals, n))
1495 return 0;
1496
1497 printed = print_spark(bf, size, svals, n);
1498 printed += scnprintf(bf + printed, size - printed, " ");
1499 return printed;
1500}
1501
1502static int hpp__color_cycles_hist(struct perf_hpp_fmt *fmt,
1503 struct perf_hpp *hpp, struct hist_entry *he)
1504{
1505 struct diff_hpp_fmt *dfmt =
1506 container_of(fmt, struct diff_hpp_fmt, fmt);
1507 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1508 struct block_hist *bh = container_of(he, struct block_hist, he);
1509 struct block_hist *bh_pair;
1510 struct hist_entry *block_he;
1511 char spark[32], buf[128];
1512 double r;
1513 int ret, pad;
1514
1515 if (!pair) {
1516 if (bh->block_idx)
1517 hpp->skip = true;
1518
1519 goto no_print;
1520 }
1521
1522 bh_pair = container_of(pair, struct block_hist, he);
1523
1524 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1525 if (!block_he) {
1526 hpp->skip = true;
1527 goto no_print;
1528 }
1529
1530 ret = print_cycles_spark(spark, sizeof(spark), block_he->diff.svals,
1531 block_he->diff.stats.n);
1532
1533 r = rel_stddev_stats(stddev_stats(&block_he->diff.stats),
1534 avg_stats(&block_he->diff.stats));
1535
1536 if (ret) {
1537 /*
1538 * Padding spaces if number of sparks less than NUM_SPARKS
1539 * otherwise the output is not aligned.
1540 */
1541 pad = NUM_SPARKS - ((ret - 1) / 3);
1542 scnprintf(buf, sizeof(buf), "%s%5.1f%% %s", "\u00B1", r, spark);
1543 ret = scnprintf(hpp->buf, hpp->size, "%*s",
1544 dfmt->header_width, buf);
1545
1546 if (pad) {
1547 ret += scnprintf(hpp->buf + ret, hpp->size - ret,
1548 "%-*s", pad, " ");
1549 }
1550
1551 return ret;
1552 }
1553
1554no_print:
1555 return scnprintf(hpp->buf, hpp->size, "%*s",
1556 dfmt->header_width, " ");
1557}
1558
1559static void
1560hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
1561{
1562 switch (idx) {
1563 case PERF_HPP_DIFF__PERIOD_BASELINE:
1564 scnprintf(buf, size, "%" PRIu64, he->stat.period);
1565 break;
1566
1567 default:
1568 break;
1569 }
1570}
1571
1572static void
1573hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
1574 int idx, char *buf, size_t size)
1575{
1576 double diff;
1577 double ratio;
1578 s64 wdiff;
1579
1580 switch (idx) {
1581 case PERF_HPP_DIFF__DELTA:
1582 case PERF_HPP_DIFF__DELTA_ABS:
1583 if (pair->diff.computed)
1584 diff = pair->diff.period_ratio_delta;
1585 else
1586 diff = compute_delta(he, pair);
1587
1588 scnprintf(buf, size, "%+4.2F%%", diff);
1589 break;
1590
1591 case PERF_HPP_DIFF__RATIO:
1592 /* No point for ratio number if we are dummy.. */
1593 if (he->dummy) {
1594 scnprintf(buf, size, "N/A");
1595 break;
1596 }
1597
1598 if (pair->diff.computed)
1599 ratio = pair->diff.period_ratio;
1600 else
1601 ratio = compute_ratio(he, pair);
1602
1603 if (ratio > 0.0)
1604 scnprintf(buf, size, "%14.6F", ratio);
1605 break;
1606
1607 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1608 /* No point for wdiff number if we are dummy.. */
1609 if (he->dummy) {
1610 scnprintf(buf, size, "N/A");
1611 break;
1612 }
1613
1614 if (pair->diff.computed)
1615 wdiff = pair->diff.wdiff;
1616 else
1617 wdiff = compute_wdiff(he, pair);
1618
1619 if (wdiff != 0)
1620 scnprintf(buf, size, "%14ld", wdiff);
1621 break;
1622
1623 case PERF_HPP_DIFF__FORMULA:
1624 formula_fprintf(he, pair, buf, size);
1625 break;
1626
1627 case PERF_HPP_DIFF__PERIOD:
1628 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1629 break;
1630
1631 default:
1632 BUG_ON(1);
1633 }
1634}
1635
1636static void
1637__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1638 char *buf, size_t size)
1639{
1640 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1641 int idx = dfmt->idx;
1642
1643 /* baseline is special */
1644 if (idx == PERF_HPP_DIFF__BASELINE)
1645 hpp__entry_baseline(he, buf, size);
1646 else {
1647 if (pair)
1648 hpp__entry_pair(he, pair, idx, buf, size);
1649 else
1650 hpp__entry_unpair(he, idx, buf, size);
1651 }
1652}
1653
1654static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1655 struct hist_entry *he)
1656{
1657 struct diff_hpp_fmt *dfmt =
1658 container_of(_fmt, struct diff_hpp_fmt, fmt);
1659 char buf[MAX_COL_WIDTH] = " ";
1660
1661 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1662
1663 if (symbol_conf.field_sep)
1664 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1665 else
1666 return scnprintf(hpp->buf, hpp->size, "%*s",
1667 dfmt->header_width, buf);
1668}
1669
1670static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1671 struct hists *hists __maybe_unused,
1672 int line __maybe_unused,
1673 int *span __maybe_unused)
1674{
1675 struct diff_hpp_fmt *dfmt =
1676 container_of(fmt, struct diff_hpp_fmt, fmt);
1677
1678 BUG_ON(!dfmt->header);
1679 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1680}
1681
1682static int hpp__width(struct perf_hpp_fmt *fmt,
1683 struct perf_hpp *hpp __maybe_unused,
1684 struct hists *hists __maybe_unused)
1685{
1686 struct diff_hpp_fmt *dfmt =
1687 container_of(fmt, struct diff_hpp_fmt, fmt);
1688
1689 BUG_ON(dfmt->header_width <= 0);
1690 return dfmt->header_width;
1691}
1692
1693static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1694{
1695#define MAX_HEADER_NAME 100
1696 char buf_indent[MAX_HEADER_NAME];
1697 char buf[MAX_HEADER_NAME];
1698 const char *header = NULL;
1699 int width = 0;
1700
1701 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1702 header = columns[dfmt->idx].name;
1703 width = columns[dfmt->idx].width;
1704
1705 /* Only our defined HPP fmts should appear here. */
1706 BUG_ON(!header);
1707
1708 if (data__files_cnt > 2)
1709 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1710
1711#define NAME (data__files_cnt > 2 ? buf : header)
1712 dfmt->header_width = width;
1713 width = (int) strlen(NAME);
1714 if (dfmt->header_width < width)
1715 dfmt->header_width = width;
1716
1717 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1718 dfmt->header_width, NAME);
1719
1720 dfmt->header = strdup(buf_indent);
1721#undef MAX_HEADER_NAME
1722#undef NAME
1723}
1724
1725static void data__hpp_register(struct data__file *d, int idx)
1726{
1727 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1728 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1729
1730 dfmt->idx = idx;
1731
1732 fmt->header = hpp__header;
1733 fmt->width = hpp__width;
1734 fmt->entry = hpp__entry_global;
1735 fmt->cmp = hist_entry__cmp_nop;
1736 fmt->collapse = hist_entry__cmp_nop;
1737
1738 /* TODO more colors */
1739 switch (idx) {
1740 case PERF_HPP_DIFF__BASELINE:
1741 fmt->color = hpp__color_baseline;
1742 fmt->sort = hist_entry__cmp_baseline;
1743 break;
1744 case PERF_HPP_DIFF__DELTA:
1745 fmt->color = hpp__color_delta;
1746 fmt->sort = hist_entry__cmp_delta;
1747 break;
1748 case PERF_HPP_DIFF__RATIO:
1749 fmt->color = hpp__color_ratio;
1750 fmt->sort = hist_entry__cmp_ratio;
1751 break;
1752 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1753 fmt->color = hpp__color_wdiff;
1754 fmt->sort = hist_entry__cmp_wdiff;
1755 break;
1756 case PERF_HPP_DIFF__DELTA_ABS:
1757 fmt->color = hpp__color_delta;
1758 fmt->sort = hist_entry__cmp_delta_abs;
1759 break;
1760 case PERF_HPP_DIFF__CYCLES:
1761 fmt->color = hpp__color_cycles;
1762 fmt->sort = hist_entry__cmp_nop;
1763 break;
1764 case PERF_HPP_DIFF__CYCLES_HIST:
1765 fmt->color = hpp__color_cycles_hist;
1766 fmt->sort = hist_entry__cmp_nop;
1767 break;
1768 default:
1769 fmt->sort = hist_entry__cmp_nop;
1770 break;
1771 }
1772
1773 init_header(d, dfmt);
1774 perf_hpp__column_register(fmt);
1775 perf_hpp__register_sort_field(fmt);
1776}
1777
1778static int ui_init(void)
1779{
1780 struct data__file *d;
1781 struct perf_hpp_fmt *fmt;
1782 int i;
1783
1784 data__for_each_file(i, d) {
1785
1786 /*
1787 * Baseline or compute related columns:
1788 *
1789 * PERF_HPP_DIFF__BASELINE
1790 * PERF_HPP_DIFF__DELTA
1791 * PERF_HPP_DIFF__RATIO
1792 * PERF_HPP_DIFF__WEIGHTED_DIFF
1793 * PERF_HPP_DIFF__CYCLES
1794 */
1795 data__hpp_register(d, i ? compute_2_hpp[compute] :
1796 PERF_HPP_DIFF__BASELINE);
1797
1798 if (cycles_hist && i)
1799 data__hpp_register(d, PERF_HPP_DIFF__CYCLES_HIST);
1800
1801 /*
1802 * And the rest:
1803 *
1804 * PERF_HPP_DIFF__FORMULA
1805 * PERF_HPP_DIFF__PERIOD
1806 * PERF_HPP_DIFF__PERIOD_BASELINE
1807 */
1808 if (show_formula && i)
1809 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1810
1811 if (show_period)
1812 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1813 PERF_HPP_DIFF__PERIOD_BASELINE);
1814 }
1815
1816 if (!sort_compute)
1817 return 0;
1818
1819 /*
1820 * Prepend an fmt to sort on columns at 'sort_compute' first.
1821 * This fmt is added only to the sort list but not to the
1822 * output fields list.
1823 *
1824 * Note that this column (data) can be compared twice - one
1825 * for this 'sort_compute' fmt and another for the normal
1826 * diff_hpp_fmt. But it shouldn't a problem as most entries
1827 * will be sorted out by first try or baseline and comparing
1828 * is not a costly operation.
1829 */
1830 fmt = zalloc(sizeof(*fmt));
1831 if (fmt == NULL) {
1832 pr_err("Memory allocation failed\n");
1833 return -1;
1834 }
1835
1836 fmt->cmp = hist_entry__cmp_nop;
1837 fmt->collapse = hist_entry__cmp_nop;
1838
1839 switch (compute) {
1840 case COMPUTE_DELTA:
1841 fmt->sort = hist_entry__cmp_delta_idx;
1842 break;
1843 case COMPUTE_RATIO:
1844 fmt->sort = hist_entry__cmp_ratio_idx;
1845 break;
1846 case COMPUTE_WEIGHTED_DIFF:
1847 fmt->sort = hist_entry__cmp_wdiff_idx;
1848 break;
1849 case COMPUTE_DELTA_ABS:
1850 fmt->sort = hist_entry__cmp_delta_abs_idx;
1851 break;
1852 case COMPUTE_CYCLES:
1853 /*
1854 * Should set since 'fmt->sort' is called without
1855 * checking valid during sorting
1856 */
1857 fmt->sort = hist_entry__cmp_nop;
1858 break;
1859 default:
1860 BUG_ON(1);
1861 }
1862
1863 perf_hpp__prepend_sort_field(fmt);
1864 return 0;
1865}
1866
1867static int data_init(int argc, const char **argv)
1868{
1869 struct data__file *d;
1870 static const char *defaults[] = {
1871 "perf.data.old",
1872 "perf.data",
1873 };
1874 bool use_default = true;
1875 int i;
1876
1877 data__files_cnt = 2;
1878
1879 if (argc) {
1880 if (argc == 1)
1881 defaults[1] = argv[0];
1882 else {
1883 data__files_cnt = argc;
1884 use_default = false;
1885 }
1886 } else if (perf_guest) {
1887 defaults[0] = "perf.data.host";
1888 defaults[1] = "perf.data.guest";
1889 }
1890
1891 if (sort_compute >= (unsigned int) data__files_cnt) {
1892 pr_err("Order option out of limit.\n");
1893 return -EINVAL;
1894 }
1895
1896 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1897 if (!data__files)
1898 return -ENOMEM;
1899
1900 data__for_each_file(i, d) {
1901 struct perf_data *data = &d->data;
1902
1903 data->path = use_default ? defaults[i] : argv[i];
1904 data->mode = PERF_DATA_MODE_READ;
1905 data->force = force;
1906
1907 d->idx = i;
1908 }
1909
1910 return 0;
1911}
1912
1913static int diff__config(const char *var, const char *value,
1914 void *cb __maybe_unused)
1915{
1916 if (!strcmp(var, "diff.order")) {
1917 int ret;
1918 if (perf_config_int(&ret, var, value) < 0)
1919 return -1;
1920 sort_compute = ret;
1921 return 0;
1922 }
1923 if (!strcmp(var, "diff.compute")) {
1924 if (!strcmp(value, "delta")) {
1925 compute = COMPUTE_DELTA;
1926 } else if (!strcmp(value, "delta-abs")) {
1927 compute = COMPUTE_DELTA_ABS;
1928 } else if (!strcmp(value, "ratio")) {
1929 compute = COMPUTE_RATIO;
1930 } else if (!strcmp(value, "wdiff")) {
1931 compute = COMPUTE_WEIGHTED_DIFF;
1932 } else {
1933 pr_err("Invalid compute method: %s\n", value);
1934 return -1;
1935 }
1936 }
1937
1938 return 0;
1939}
1940
1941int cmd_diff(int argc, const char **argv)
1942{
1943 int ret = hists__init();
1944
1945 if (ret < 0)
1946 return ret;
1947
1948 perf_tool__init(&pdiff.tool, /*ordered_events=*/true);
1949 pdiff.tool.sample = diff__process_sample_event;
1950 pdiff.tool.mmap = perf_event__process_mmap;
1951 pdiff.tool.mmap2 = perf_event__process_mmap2;
1952 pdiff.tool.comm = perf_event__process_comm;
1953 pdiff.tool.exit = perf_event__process_exit;
1954 pdiff.tool.fork = perf_event__process_fork;
1955 pdiff.tool.lost = perf_event__process_lost;
1956 pdiff.tool.namespaces = perf_event__process_namespaces;
1957 pdiff.tool.cgroup = perf_event__process_cgroup;
1958 pdiff.tool.ordering_requires_timestamps = true;
1959
1960 perf_config(diff__config, NULL);
1961
1962 argc = parse_options(argc, argv, options, diff_usage, 0);
1963
1964 if (quiet)
1965 perf_quiet_option();
1966
1967 if (cycles_hist && (compute != COMPUTE_CYCLES))
1968 usage_with_options(diff_usage, options);
1969
1970 if (pdiff.stream)
1971 compute = COMPUTE_STREAM;
1972
1973 symbol__annotation_init();
1974
1975 if (symbol__init(NULL) < 0)
1976 return -1;
1977
1978 if (data_init(argc, argv) < 0)
1979 return -1;
1980
1981 if (check_file_brstack() < 0)
1982 return -1;
1983
1984 if ((compute == COMPUTE_CYCLES || compute == COMPUTE_STREAM)
1985 && !pdiff.has_br_stack) {
1986 return -1;
1987 }
1988
1989 if (compute == COMPUTE_STREAM) {
1990 symbol_conf.show_branchflag_count = true;
1991 symbol_conf.disable_add2line_warn = true;
1992 callchain_param.mode = CHAIN_FLAT;
1993 callchain_param.key = CCKEY_SRCLINE;
1994 callchain_param.branch_callstack = 1;
1995 symbol_conf.use_callchain = true;
1996 callchain_register_param(&callchain_param);
1997 sort_order = "srcline,symbol,dso";
1998 } else {
1999 if (ui_init() < 0)
2000 return -1;
2001
2002 sort__mode = SORT_MODE__DIFF;
2003 }
2004
2005 if (setup_sorting(NULL) < 0)
2006 usage_with_options(diff_usage, options);
2007
2008 setup_pager();
2009
2010 sort__setup_elide(NULL);
2011
2012 return __cmd_diff();
2013}