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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 diff__process_sample_event(struct perf_tool *tool __maybe_unused,
314 union perf_event *event,
315 struct perf_sample *sample,
316 struct perf_evsel *evsel,
317 struct machine *machine)
318{
319 struct addr_location al;
320 struct hists *hists = evsel__hists(evsel);
321 int ret = -1;
322
323 if (machine__resolve(machine, &al, sample) < 0) {
324 pr_warning("problem processing %d event, skipping it.\n",
325 event->header.type);
326 return -1;
327 }
328
329 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample, true)) {
330 pr_warning("problem incrementing symbol period, skipping event\n");
331 goto out_put;
332 }
333
334 /*
335 * The total_period is updated here before going to the output
336 * tree since normally only the baseline hists will call
337 * hists__output_resort() and precompute needs the total
338 * period in order to sort entries by percentage delta.
339 */
340 hists->stats.total_period += sample->period;
341 if (!al.filtered)
342 hists->stats.total_non_filtered_period += sample->period;
343 ret = 0;
344out_put:
345 addr_location__put(&al);
346 return ret;
347}
348
349static struct perf_tool tool = {
350 .sample = diff__process_sample_event,
351 .mmap = perf_event__process_mmap,
352 .mmap2 = perf_event__process_mmap2,
353 .comm = perf_event__process_comm,
354 .exit = perf_event__process_exit,
355 .fork = perf_event__process_fork,
356 .lost = perf_event__process_lost,
357 .ordered_events = true,
358 .ordering_requires_timestamps = true,
359};
360
361static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
362 struct perf_evlist *evlist)
363{
364 struct perf_evsel *e;
365
366 evlist__for_each_entry(evlist, e) {
367 if (perf_evsel__match2(evsel, e))
368 return e;
369 }
370
371 return NULL;
372}
373
374static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
375{
376 struct perf_evsel *evsel;
377
378 evlist__for_each_entry(evlist, evsel) {
379 struct hists *hists = evsel__hists(evsel);
380
381 hists__collapse_resort(hists, NULL);
382 }
383}
384
385static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
386{
387 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
388 void *ptr = dfmt - dfmt->idx;
389 struct data__file *d = container_of(ptr, struct data__file, fmt);
390
391 return d;
392}
393
394static struct hist_entry*
395get_pair_data(struct hist_entry *he, struct data__file *d)
396{
397 if (hist_entry__has_pairs(he)) {
398 struct hist_entry *pair;
399
400 list_for_each_entry(pair, &he->pairs.head, pairs.node)
401 if (pair->hists == d->hists)
402 return pair;
403 }
404
405 return NULL;
406}
407
408static struct hist_entry*
409get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
410{
411 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
412
413 return get_pair_data(he, d);
414}
415
416static void hists__baseline_only(struct hists *hists)
417{
418 struct rb_root *root;
419 struct rb_node *next;
420
421 if (hists__has(hists, need_collapse))
422 root = &hists->entries_collapsed;
423 else
424 root = hists->entries_in;
425
426 next = rb_first(root);
427 while (next != NULL) {
428 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
429
430 next = rb_next(&he->rb_node_in);
431 if (!hist_entry__next_pair(he)) {
432 rb_erase(&he->rb_node_in, root);
433 hist_entry__delete(he);
434 }
435 }
436}
437
438static void hists__precompute(struct hists *hists)
439{
440 struct rb_root *root;
441 struct rb_node *next;
442
443 if (hists__has(hists, need_collapse))
444 root = &hists->entries_collapsed;
445 else
446 root = hists->entries_in;
447
448 next = rb_first(root);
449 while (next != NULL) {
450 struct hist_entry *he, *pair;
451 struct data__file *d;
452 int i;
453
454 he = rb_entry(next, struct hist_entry, rb_node_in);
455 next = rb_next(&he->rb_node_in);
456
457 data__for_each_file_new(i, d) {
458 pair = get_pair_data(he, d);
459 if (!pair)
460 continue;
461
462 switch (compute) {
463 case COMPUTE_DELTA:
464 compute_delta(he, pair);
465 break;
466 case COMPUTE_RATIO:
467 compute_ratio(he, pair);
468 break;
469 case COMPUTE_WEIGHTED_DIFF:
470 compute_wdiff(he, pair);
471 break;
472 default:
473 BUG_ON(1);
474 }
475 }
476 }
477}
478
479static int64_t cmp_doubles(double l, double r)
480{
481 if (l > r)
482 return -1;
483 else if (l < r)
484 return 1;
485 else
486 return 0;
487}
488
489static int64_t
490__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
491 int c)
492{
493 switch (c) {
494 case COMPUTE_DELTA:
495 {
496 double l = left->diff.period_ratio_delta;
497 double r = right->diff.period_ratio_delta;
498
499 return cmp_doubles(l, r);
500 }
501 case COMPUTE_RATIO:
502 {
503 double l = left->diff.period_ratio;
504 double r = right->diff.period_ratio;
505
506 return cmp_doubles(l, r);
507 }
508 case COMPUTE_WEIGHTED_DIFF:
509 {
510 s64 l = left->diff.wdiff;
511 s64 r = right->diff.wdiff;
512
513 return r - l;
514 }
515 default:
516 BUG_ON(1);
517 }
518
519 return 0;
520}
521
522static int64_t
523hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
524 int c, int sort_idx)
525{
526 bool pairs_left = hist_entry__has_pairs(left);
527 bool pairs_right = hist_entry__has_pairs(right);
528 struct hist_entry *p_right, *p_left;
529
530 if (!pairs_left && !pairs_right)
531 return 0;
532
533 if (!pairs_left || !pairs_right)
534 return pairs_left ? -1 : 1;
535
536 p_left = get_pair_data(left, &data__files[sort_idx]);
537 p_right = get_pair_data(right, &data__files[sort_idx]);
538
539 if (!p_left && !p_right)
540 return 0;
541
542 if (!p_left || !p_right)
543 return p_left ? -1 : 1;
544
545 /*
546 * We have 2 entries of same kind, let's
547 * make the data comparison.
548 */
549 return __hist_entry__cmp_compute(p_left, p_right, c);
550}
551
552static int64_t
553hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
554 int c, int sort_idx)
555{
556 struct hist_entry *p_right, *p_left;
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 if (c != COMPUTE_DELTA) {
568 /*
569 * The delta can be computed without the baseline, but
570 * others are not. Put those entries which have no
571 * values below.
572 */
573 if (left->dummy && right->dummy)
574 return 0;
575
576 if (left->dummy || right->dummy)
577 return left->dummy ? 1 : -1;
578 }
579
580 return __hist_entry__cmp_compute(p_left, p_right, c);
581}
582
583static int64_t
584hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
585 struct hist_entry *left __maybe_unused,
586 struct hist_entry *right __maybe_unused)
587{
588 return 0;
589}
590
591static int64_t
592hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
593 struct hist_entry *left, struct hist_entry *right)
594{
595 if (left->stat.period == right->stat.period)
596 return 0;
597 return left->stat.period > right->stat.period ? 1 : -1;
598}
599
600static int64_t
601hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
602 struct hist_entry *left, struct hist_entry *right)
603{
604 struct data__file *d = fmt_to_data_file(fmt);
605
606 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
607}
608
609static int64_t
610hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
611 struct hist_entry *left, struct hist_entry *right)
612{
613 struct data__file *d = fmt_to_data_file(fmt);
614
615 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
616}
617
618static int64_t
619hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
620 struct hist_entry *left, struct hist_entry *right)
621{
622 struct data__file *d = fmt_to_data_file(fmt);
623
624 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
625}
626
627static int64_t
628hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
629 struct hist_entry *left, struct hist_entry *right)
630{
631 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
632 sort_compute);
633}
634
635static int64_t
636hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
637 struct hist_entry *left, struct hist_entry *right)
638{
639 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
640 sort_compute);
641}
642
643static int64_t
644hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
645 struct hist_entry *left, struct hist_entry *right)
646{
647 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
648 sort_compute);
649}
650
651static void hists__process(struct hists *hists)
652{
653 if (show_baseline_only)
654 hists__baseline_only(hists);
655
656 hists__precompute(hists);
657 hists__output_resort(hists, NULL);
658
659 hists__fprintf(hists, true, 0, 0, 0, stdout,
660 symbol_conf.use_callchain);
661}
662
663static void data__fprintf(void)
664{
665 struct data__file *d;
666 int i;
667
668 fprintf(stdout, "# Data files:\n");
669
670 data__for_each_file(i, d)
671 fprintf(stdout, "# [%d] %s %s\n",
672 d->idx, d->file.path,
673 !d->idx ? "(Baseline)" : "");
674
675 fprintf(stdout, "#\n");
676}
677
678static void data_process(void)
679{
680 struct perf_evlist *evlist_base = data__files[0].session->evlist;
681 struct perf_evsel *evsel_base;
682 bool first = true;
683
684 evlist__for_each_entry(evlist_base, evsel_base) {
685 struct hists *hists_base = evsel__hists(evsel_base);
686 struct data__file *d;
687 int i;
688
689 data__for_each_file_new(i, d) {
690 struct perf_evlist *evlist = d->session->evlist;
691 struct perf_evsel *evsel;
692 struct hists *hists;
693
694 evsel = evsel_match(evsel_base, evlist);
695 if (!evsel)
696 continue;
697
698 hists = evsel__hists(evsel);
699 d->hists = hists;
700
701 hists__match(hists_base, hists);
702
703 if (!show_baseline_only)
704 hists__link(hists_base, hists);
705 }
706
707 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
708 perf_evsel__name(evsel_base));
709
710 first = false;
711
712 if (verbose || data__files_cnt > 2)
713 data__fprintf();
714
715 /* Don't sort callchain for perf diff */
716 perf_evsel__reset_sample_bit(evsel_base, CALLCHAIN);
717
718 hists__process(hists_base);
719 }
720}
721
722static void data__free(struct data__file *d)
723{
724 int col;
725
726 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
727 struct diff_hpp_fmt *fmt = &d->fmt[col];
728
729 zfree(&fmt->header);
730 }
731}
732
733static int __cmd_diff(void)
734{
735 struct data__file *d;
736 int ret = -EINVAL, i;
737
738 data__for_each_file(i, d) {
739 d->session = perf_session__new(&d->file, false, &tool);
740 if (!d->session) {
741 pr_err("Failed to open %s\n", d->file.path);
742 ret = -1;
743 goto out_delete;
744 }
745
746 ret = perf_session__process_events(d->session);
747 if (ret) {
748 pr_err("Failed to process %s\n", d->file.path);
749 goto out_delete;
750 }
751
752 perf_evlist__collapse_resort(d->session->evlist);
753 }
754
755 data_process();
756
757 out_delete:
758 data__for_each_file(i, d) {
759 perf_session__delete(d->session);
760 data__free(d);
761 }
762
763 free(data__files);
764 return ret;
765}
766
767static const char * const diff_usage[] = {
768 "perf diff [<options>] [old_file] [new_file]",
769 NULL,
770};
771
772static const struct option options[] = {
773 OPT_INCR('v', "verbose", &verbose,
774 "be more verbose (show symbol address, etc)"),
775 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
776 "Show only items with match in baseline"),
777 OPT_CALLBACK('c', "compute", &compute,
778 "delta,ratio,wdiff:w1,w2 (default delta)",
779 "Entries differential computation selection",
780 setup_compute),
781 OPT_BOOLEAN('p', "period", &show_period,
782 "Show period values."),
783 OPT_BOOLEAN('F', "formula", &show_formula,
784 "Show formula."),
785 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
786 "dump raw trace in ASCII"),
787 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
788 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
789 "file", "kallsyms pathname"),
790 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
791 "load module symbols - WARNING: use only with -k and LIVE kernel"),
792 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
793 "only consider symbols in these dsos"),
794 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
795 "only consider symbols in these comms"),
796 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
797 "only consider these symbols"),
798 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
799 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
800 " Please refer the man page for the complete list."),
801 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
802 "separator for columns, no spaces will be added between "
803 "columns '.' is reserved."),
804 OPT_CALLBACK(0, "symfs", NULL, "directory",
805 "Look for files with symbols relative to this directory",
806 symbol__config_symfs),
807 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
808 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
809 "How to display percentage of filtered entries", parse_filter_percentage),
810 OPT_END()
811};
812
813static double baseline_percent(struct hist_entry *he)
814{
815 u64 total = hists__total_period(he->hists);
816
817 return 100.0 * he->stat.period / total;
818}
819
820static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
821 struct perf_hpp *hpp, struct hist_entry *he)
822{
823 struct diff_hpp_fmt *dfmt =
824 container_of(fmt, struct diff_hpp_fmt, fmt);
825 double percent = baseline_percent(he);
826 char pfmt[20] = " ";
827
828 if (!he->dummy) {
829 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
830 return percent_color_snprintf(hpp->buf, hpp->size,
831 pfmt, percent);
832 } else
833 return scnprintf(hpp->buf, hpp->size, "%*s",
834 dfmt->header_width, pfmt);
835}
836
837static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
838{
839 double percent = baseline_percent(he);
840 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
841 int ret = 0;
842
843 if (!he->dummy)
844 ret = scnprintf(buf, size, fmt, percent);
845
846 return ret;
847}
848
849static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
850 struct perf_hpp *hpp, struct hist_entry *he,
851 int comparison_method)
852{
853 struct diff_hpp_fmt *dfmt =
854 container_of(fmt, struct diff_hpp_fmt, fmt);
855 struct hist_entry *pair = get_pair_fmt(he, dfmt);
856 double diff;
857 s64 wdiff;
858 char pfmt[20] = " ";
859
860 if (!pair)
861 goto no_print;
862
863 switch (comparison_method) {
864 case COMPUTE_DELTA:
865 if (pair->diff.computed)
866 diff = pair->diff.period_ratio_delta;
867 else
868 diff = compute_delta(he, pair);
869
870 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
871 return percent_color_snprintf(hpp->buf, hpp->size,
872 pfmt, diff);
873 case COMPUTE_RATIO:
874 if (he->dummy)
875 goto dummy_print;
876 if (pair->diff.computed)
877 diff = pair->diff.period_ratio;
878 else
879 diff = compute_ratio(he, pair);
880
881 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
882 return value_color_snprintf(hpp->buf, hpp->size,
883 pfmt, diff);
884 case COMPUTE_WEIGHTED_DIFF:
885 if (he->dummy)
886 goto dummy_print;
887 if (pair->diff.computed)
888 wdiff = pair->diff.wdiff;
889 else
890 wdiff = compute_wdiff(he, pair);
891
892 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
893 return color_snprintf(hpp->buf, hpp->size,
894 get_percent_color(wdiff),
895 pfmt, wdiff);
896 default:
897 BUG_ON(1);
898 }
899dummy_print:
900 return scnprintf(hpp->buf, hpp->size, "%*s",
901 dfmt->header_width, "N/A");
902no_print:
903 return scnprintf(hpp->buf, hpp->size, "%*s",
904 dfmt->header_width, pfmt);
905}
906
907static int hpp__color_delta(struct perf_hpp_fmt *fmt,
908 struct perf_hpp *hpp, struct hist_entry *he)
909{
910 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
911}
912
913static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
914 struct perf_hpp *hpp, struct hist_entry *he)
915{
916 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
917}
918
919static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
920 struct perf_hpp *hpp, struct hist_entry *he)
921{
922 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
923}
924
925static void
926hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
927{
928 switch (idx) {
929 case PERF_HPP_DIFF__PERIOD_BASELINE:
930 scnprintf(buf, size, "%" PRIu64, he->stat.period);
931 break;
932
933 default:
934 break;
935 }
936}
937
938static void
939hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
940 int idx, char *buf, size_t size)
941{
942 double diff;
943 double ratio;
944 s64 wdiff;
945
946 switch (idx) {
947 case PERF_HPP_DIFF__DELTA:
948 if (pair->diff.computed)
949 diff = pair->diff.period_ratio_delta;
950 else
951 diff = compute_delta(he, pair);
952
953 scnprintf(buf, size, "%+4.2F%%", diff);
954 break;
955
956 case PERF_HPP_DIFF__RATIO:
957 /* No point for ratio number if we are dummy.. */
958 if (he->dummy) {
959 scnprintf(buf, size, "N/A");
960 break;
961 }
962
963 if (pair->diff.computed)
964 ratio = pair->diff.period_ratio;
965 else
966 ratio = compute_ratio(he, pair);
967
968 if (ratio > 0.0)
969 scnprintf(buf, size, "%14.6F", ratio);
970 break;
971
972 case PERF_HPP_DIFF__WEIGHTED_DIFF:
973 /* No point for wdiff number if we are dummy.. */
974 if (he->dummy) {
975 scnprintf(buf, size, "N/A");
976 break;
977 }
978
979 if (pair->diff.computed)
980 wdiff = pair->diff.wdiff;
981 else
982 wdiff = compute_wdiff(he, pair);
983
984 if (wdiff != 0)
985 scnprintf(buf, size, "%14ld", wdiff);
986 break;
987
988 case PERF_HPP_DIFF__FORMULA:
989 formula_fprintf(he, pair, buf, size);
990 break;
991
992 case PERF_HPP_DIFF__PERIOD:
993 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
994 break;
995
996 default:
997 BUG_ON(1);
998 };
999}
1000
1001static void
1002__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1003 char *buf, size_t size)
1004{
1005 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1006 int idx = dfmt->idx;
1007
1008 /* baseline is special */
1009 if (idx == PERF_HPP_DIFF__BASELINE)
1010 hpp__entry_baseline(he, buf, size);
1011 else {
1012 if (pair)
1013 hpp__entry_pair(he, pair, idx, buf, size);
1014 else
1015 hpp__entry_unpair(he, idx, buf, size);
1016 }
1017}
1018
1019static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1020 struct hist_entry *he)
1021{
1022 struct diff_hpp_fmt *dfmt =
1023 container_of(_fmt, struct diff_hpp_fmt, fmt);
1024 char buf[MAX_COL_WIDTH] = " ";
1025
1026 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1027
1028 if (symbol_conf.field_sep)
1029 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1030 else
1031 return scnprintf(hpp->buf, hpp->size, "%*s",
1032 dfmt->header_width, buf);
1033}
1034
1035static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1036 struct hists *hists __maybe_unused,
1037 int line __maybe_unused,
1038 int *span __maybe_unused)
1039{
1040 struct diff_hpp_fmt *dfmt =
1041 container_of(fmt, struct diff_hpp_fmt, fmt);
1042
1043 BUG_ON(!dfmt->header);
1044 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1045}
1046
1047static int hpp__width(struct perf_hpp_fmt *fmt,
1048 struct perf_hpp *hpp __maybe_unused,
1049 struct hists *hists __maybe_unused)
1050{
1051 struct diff_hpp_fmt *dfmt =
1052 container_of(fmt, struct diff_hpp_fmt, fmt);
1053
1054 BUG_ON(dfmt->header_width <= 0);
1055 return dfmt->header_width;
1056}
1057
1058static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1059{
1060#define MAX_HEADER_NAME 100
1061 char buf_indent[MAX_HEADER_NAME];
1062 char buf[MAX_HEADER_NAME];
1063 const char *header = NULL;
1064 int width = 0;
1065
1066 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1067 header = columns[dfmt->idx].name;
1068 width = columns[dfmt->idx].width;
1069
1070 /* Only our defined HPP fmts should appear here. */
1071 BUG_ON(!header);
1072
1073 if (data__files_cnt > 2)
1074 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1075
1076#define NAME (data__files_cnt > 2 ? buf : header)
1077 dfmt->header_width = width;
1078 width = (int) strlen(NAME);
1079 if (dfmt->header_width < width)
1080 dfmt->header_width = width;
1081
1082 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1083 dfmt->header_width, NAME);
1084
1085 dfmt->header = strdup(buf_indent);
1086#undef MAX_HEADER_NAME
1087#undef NAME
1088}
1089
1090static void data__hpp_register(struct data__file *d, int idx)
1091{
1092 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1093 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1094
1095 dfmt->idx = idx;
1096
1097 fmt->header = hpp__header;
1098 fmt->width = hpp__width;
1099 fmt->entry = hpp__entry_global;
1100 fmt->cmp = hist_entry__cmp_nop;
1101 fmt->collapse = hist_entry__cmp_nop;
1102
1103 /* TODO more colors */
1104 switch (idx) {
1105 case PERF_HPP_DIFF__BASELINE:
1106 fmt->color = hpp__color_baseline;
1107 fmt->sort = hist_entry__cmp_baseline;
1108 break;
1109 case PERF_HPP_DIFF__DELTA:
1110 fmt->color = hpp__color_delta;
1111 fmt->sort = hist_entry__cmp_delta;
1112 break;
1113 case PERF_HPP_DIFF__RATIO:
1114 fmt->color = hpp__color_ratio;
1115 fmt->sort = hist_entry__cmp_ratio;
1116 break;
1117 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1118 fmt->color = hpp__color_wdiff;
1119 fmt->sort = hist_entry__cmp_wdiff;
1120 break;
1121 default:
1122 fmt->sort = hist_entry__cmp_nop;
1123 break;
1124 }
1125
1126 init_header(d, dfmt);
1127 perf_hpp__column_register(fmt);
1128 perf_hpp__register_sort_field(fmt);
1129}
1130
1131static int ui_init(void)
1132{
1133 struct data__file *d;
1134 struct perf_hpp_fmt *fmt;
1135 int i;
1136
1137 data__for_each_file(i, d) {
1138
1139 /*
1140 * Baseline or compute realted columns:
1141 *
1142 * PERF_HPP_DIFF__BASELINE
1143 * PERF_HPP_DIFF__DELTA
1144 * PERF_HPP_DIFF__RATIO
1145 * PERF_HPP_DIFF__WEIGHTED_DIFF
1146 */
1147 data__hpp_register(d, i ? compute_2_hpp[compute] :
1148 PERF_HPP_DIFF__BASELINE);
1149
1150 /*
1151 * And the rest:
1152 *
1153 * PERF_HPP_DIFF__FORMULA
1154 * PERF_HPP_DIFF__PERIOD
1155 * PERF_HPP_DIFF__PERIOD_BASELINE
1156 */
1157 if (show_formula && i)
1158 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1159
1160 if (show_period)
1161 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1162 PERF_HPP_DIFF__PERIOD_BASELINE);
1163 }
1164
1165 if (!sort_compute)
1166 return 0;
1167
1168 /*
1169 * Prepend an fmt to sort on columns at 'sort_compute' first.
1170 * This fmt is added only to the sort list but not to the
1171 * output fields list.
1172 *
1173 * Note that this column (data) can be compared twice - one
1174 * for this 'sort_compute' fmt and another for the normal
1175 * diff_hpp_fmt. But it shouldn't a problem as most entries
1176 * will be sorted out by first try or baseline and comparing
1177 * is not a costly operation.
1178 */
1179 fmt = zalloc(sizeof(*fmt));
1180 if (fmt == NULL) {
1181 pr_err("Memory allocation failed\n");
1182 return -1;
1183 }
1184
1185 fmt->cmp = hist_entry__cmp_nop;
1186 fmt->collapse = hist_entry__cmp_nop;
1187
1188 switch (compute) {
1189 case COMPUTE_DELTA:
1190 fmt->sort = hist_entry__cmp_delta_idx;
1191 break;
1192 case COMPUTE_RATIO:
1193 fmt->sort = hist_entry__cmp_ratio_idx;
1194 break;
1195 case COMPUTE_WEIGHTED_DIFF:
1196 fmt->sort = hist_entry__cmp_wdiff_idx;
1197 break;
1198 default:
1199 BUG_ON(1);
1200 }
1201
1202 perf_hpp__prepend_sort_field(fmt);
1203 return 0;
1204}
1205
1206static int data_init(int argc, const char **argv)
1207{
1208 struct data__file *d;
1209 static const char *defaults[] = {
1210 "perf.data.old",
1211 "perf.data",
1212 };
1213 bool use_default = true;
1214 int i;
1215
1216 data__files_cnt = 2;
1217
1218 if (argc) {
1219 if (argc == 1)
1220 defaults[1] = argv[0];
1221 else {
1222 data__files_cnt = argc;
1223 use_default = false;
1224 }
1225 } else if (perf_guest) {
1226 defaults[0] = "perf.data.host";
1227 defaults[1] = "perf.data.guest";
1228 }
1229
1230 if (sort_compute >= (unsigned int) data__files_cnt) {
1231 pr_err("Order option out of limit.\n");
1232 return -EINVAL;
1233 }
1234
1235 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1236 if (!data__files)
1237 return -ENOMEM;
1238
1239 data__for_each_file(i, d) {
1240 struct perf_data_file *file = &d->file;
1241
1242 file->path = use_default ? defaults[i] : argv[i];
1243 file->mode = PERF_DATA_MODE_READ,
1244 file->force = force,
1245
1246 d->idx = i;
1247 }
1248
1249 return 0;
1250}
1251
1252int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1253{
1254 int ret = hists__init();
1255
1256 if (ret < 0)
1257 return ret;
1258
1259 argc = parse_options(argc, argv, options, diff_usage, 0);
1260
1261 if (symbol__init(NULL) < 0)
1262 return -1;
1263
1264 if (data_init(argc, argv) < 0)
1265 return -1;
1266
1267 if (ui_init() < 0)
1268 return -1;
1269
1270 sort__mode = SORT_MODE__DIFF;
1271
1272 if (setup_sorting(NULL) < 0)
1273 usage_with_options(diff_usage, options);
1274
1275 setup_pager();
1276
1277 sort__setup_elide(NULL);
1278
1279 return __cmd_diff();
1280}
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(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, false,
435 NULL);
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 .tool = {
472 .sample = diff__process_sample_event,
473 .mmap = perf_event__process_mmap,
474 .mmap2 = perf_event__process_mmap2,
475 .comm = perf_event__process_comm,
476 .exit = perf_event__process_exit,
477 .fork = perf_event__process_fork,
478 .lost = perf_event__process_lost,
479 .namespaces = perf_event__process_namespaces,
480 .cgroup = perf_event__process_cgroup,
481 .ordered_events = true,
482 .ordering_requires_timestamps = true,
483 },
484};
485
486static struct evsel *evsel_match(struct evsel *evsel,
487 struct evlist *evlist)
488{
489 struct evsel *e;
490
491 evlist__for_each_entry(evlist, e) {
492 if (evsel__match2(evsel, e))
493 return e;
494 }
495
496 return NULL;
497}
498
499static void evlist__collapse_resort(struct evlist *evlist)
500{
501 struct evsel *evsel;
502
503 evlist__for_each_entry(evlist, evsel) {
504 struct hists *hists = evsel__hists(evsel);
505
506 hists__collapse_resort(hists, NULL);
507 }
508}
509
510static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
511{
512 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
513 void *ptr = dfmt - dfmt->idx;
514 struct data__file *d = container_of(ptr, struct data__file, fmt);
515
516 return d;
517}
518
519static struct hist_entry*
520get_pair_data(struct hist_entry *he, struct data__file *d)
521{
522 if (hist_entry__has_pairs(he)) {
523 struct hist_entry *pair;
524
525 list_for_each_entry(pair, &he->pairs.head, pairs.node)
526 if (pair->hists == d->hists)
527 return pair;
528 }
529
530 return NULL;
531}
532
533static struct hist_entry*
534get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
535{
536 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
537
538 return get_pair_data(he, d);
539}
540
541static void hists__baseline_only(struct hists *hists)
542{
543 struct rb_root_cached *root;
544 struct rb_node *next;
545
546 if (hists__has(hists, need_collapse))
547 root = &hists->entries_collapsed;
548 else
549 root = hists->entries_in;
550
551 next = rb_first_cached(root);
552 while (next != NULL) {
553 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
554
555 next = rb_next(&he->rb_node_in);
556 if (!hist_entry__next_pair(he)) {
557 rb_erase_cached(&he->rb_node_in, root);
558 hist_entry__delete(he);
559 }
560 }
561}
562
563static int64_t block_cycles_diff_cmp(struct hist_entry *left,
564 struct hist_entry *right)
565{
566 bool pairs_left = hist_entry__has_pairs(left);
567 bool pairs_right = hist_entry__has_pairs(right);
568 s64 l, r;
569
570 if (!pairs_left && !pairs_right)
571 return 0;
572
573 l = llabs(left->diff.cycles);
574 r = llabs(right->diff.cycles);
575 return r - l;
576}
577
578static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused,
579 struct hist_entry *left, struct hist_entry *right)
580{
581 return block_cycles_diff_cmp(right, left);
582}
583
584static void init_block_hist(struct block_hist *bh)
585{
586 __hists__init(&bh->block_hists, &bh->block_list);
587 perf_hpp_list__init(&bh->block_list);
588
589 INIT_LIST_HEAD(&bh->block_fmt.list);
590 INIT_LIST_HEAD(&bh->block_fmt.sort_list);
591 bh->block_fmt.cmp = block_info__cmp;
592 bh->block_fmt.sort = block_sort;
593 perf_hpp_list__register_sort_field(&bh->block_list,
594 &bh->block_fmt);
595 bh->valid = true;
596}
597
598static struct hist_entry *get_block_pair(struct hist_entry *he,
599 struct hists *hists_pair)
600{
601 struct rb_root_cached *root = hists_pair->entries_in;
602 struct rb_node *next = rb_first_cached(root);
603 int64_t cmp;
604
605 while (next != NULL) {
606 struct hist_entry *he_pair = rb_entry(next, struct hist_entry,
607 rb_node_in);
608
609 next = rb_next(&he_pair->rb_node_in);
610
611 cmp = __block_info__cmp(he_pair, he);
612 if (!cmp)
613 return he_pair;
614 }
615
616 return NULL;
617}
618
619static void init_spark_values(unsigned long *svals, int num)
620{
621 for (int i = 0; i < num; i++)
622 svals[i] = 0;
623}
624
625static void update_spark_value(unsigned long *svals, int num,
626 struct stats *stats, u64 val)
627{
628 int n = stats->n;
629
630 if (n < num)
631 svals[n] = val;
632}
633
634static void compute_cycles_diff(struct hist_entry *he,
635 struct hist_entry *pair)
636{
637 pair->diff.computed = true;
638 if (pair->block_info->num && he->block_info->num) {
639 pair->diff.cycles =
640 pair->block_info->cycles_aggr / pair->block_info->num_aggr -
641 he->block_info->cycles_aggr / he->block_info->num_aggr;
642
643 if (!cycles_hist)
644 return;
645
646 init_stats(&pair->diff.stats);
647 init_spark_values(pair->diff.svals, NUM_SPARKS);
648
649 for (int i = 0; i < pair->block_info->num; i++) {
650 u64 val;
651
652 if (i >= he->block_info->num || i >= NUM_SPARKS)
653 break;
654
655 val = llabs(pair->block_info->cycles_spark[i] -
656 he->block_info->cycles_spark[i]);
657
658 update_spark_value(pair->diff.svals, NUM_SPARKS,
659 &pair->diff.stats, val);
660 update_stats(&pair->diff.stats, val);
661 }
662 }
663}
664
665static void block_hists_match(struct hists *hists_base,
666 struct hists *hists_pair)
667{
668 struct rb_root_cached *root = hists_base->entries_in;
669 struct rb_node *next = rb_first_cached(root);
670
671 while (next != NULL) {
672 struct hist_entry *he = rb_entry(next, struct hist_entry,
673 rb_node_in);
674 struct hist_entry *pair = get_block_pair(he, hists_pair);
675
676 next = rb_next(&he->rb_node_in);
677
678 if (pair) {
679 hist_entry__add_pair(pair, he);
680 compute_cycles_diff(he, pair);
681 }
682 }
683}
684
685static void hists__precompute(struct hists *hists)
686{
687 struct rb_root_cached *root;
688 struct rb_node *next;
689
690 if (hists__has(hists, need_collapse))
691 root = &hists->entries_collapsed;
692 else
693 root = hists->entries_in;
694
695 next = rb_first_cached(root);
696 while (next != NULL) {
697 struct block_hist *bh, *pair_bh;
698 struct hist_entry *he, *pair;
699 struct data__file *d;
700 int i;
701
702 he = rb_entry(next, struct hist_entry, rb_node_in);
703 next = rb_next(&he->rb_node_in);
704
705 if (compute == COMPUTE_CYCLES) {
706 bh = container_of(he, struct block_hist, he);
707 init_block_hist(bh);
708 block_info__process_sym(he, bh, NULL, 0);
709 }
710
711 data__for_each_file_new(i, d) {
712 pair = get_pair_data(he, d);
713 if (!pair)
714 continue;
715
716 switch (compute) {
717 case COMPUTE_DELTA:
718 case COMPUTE_DELTA_ABS:
719 compute_delta(he, pair);
720 break;
721 case COMPUTE_RATIO:
722 compute_ratio(he, pair);
723 break;
724 case COMPUTE_WEIGHTED_DIFF:
725 compute_wdiff(he, pair);
726 break;
727 case COMPUTE_CYCLES:
728 pair_bh = container_of(pair, struct block_hist,
729 he);
730 init_block_hist(pair_bh);
731 block_info__process_sym(pair, pair_bh, NULL, 0);
732
733 bh = container_of(he, struct block_hist, he);
734
735 if (bh->valid && pair_bh->valid) {
736 block_hists_match(&bh->block_hists,
737 &pair_bh->block_hists);
738 hists__output_resort(&pair_bh->block_hists,
739 NULL);
740 }
741 break;
742 default:
743 BUG_ON(1);
744 }
745 }
746 }
747}
748
749static int64_t cmp_doubles(double l, double r)
750{
751 if (l > r)
752 return -1;
753 else if (l < r)
754 return 1;
755 else
756 return 0;
757}
758
759static int64_t
760__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
761 int c)
762{
763 switch (c) {
764 case COMPUTE_DELTA:
765 {
766 double l = left->diff.period_ratio_delta;
767 double r = right->diff.period_ratio_delta;
768
769 return cmp_doubles(l, r);
770 }
771 case COMPUTE_DELTA_ABS:
772 {
773 double l = fabs(left->diff.period_ratio_delta);
774 double r = fabs(right->diff.period_ratio_delta);
775
776 return cmp_doubles(l, r);
777 }
778 case COMPUTE_RATIO:
779 {
780 double l = left->diff.period_ratio;
781 double r = right->diff.period_ratio;
782
783 return cmp_doubles(l, r);
784 }
785 case COMPUTE_WEIGHTED_DIFF:
786 {
787 s64 l = left->diff.wdiff;
788 s64 r = right->diff.wdiff;
789
790 return r - l;
791 }
792 default:
793 BUG_ON(1);
794 }
795
796 return 0;
797}
798
799static int64_t
800hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
801 int c, int sort_idx)
802{
803 bool pairs_left = hist_entry__has_pairs(left);
804 bool pairs_right = hist_entry__has_pairs(right);
805 struct hist_entry *p_right, *p_left;
806
807 if (!pairs_left && !pairs_right)
808 return 0;
809
810 if (!pairs_left || !pairs_right)
811 return pairs_left ? -1 : 1;
812
813 p_left = get_pair_data(left, &data__files[sort_idx]);
814 p_right = get_pair_data(right, &data__files[sort_idx]);
815
816 if (!p_left && !p_right)
817 return 0;
818
819 if (!p_left || !p_right)
820 return p_left ? -1 : 1;
821
822 /*
823 * We have 2 entries of same kind, let's
824 * make the data comparison.
825 */
826 return __hist_entry__cmp_compute(p_left, p_right, c);
827}
828
829static int64_t
830hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
831 int c, int sort_idx)
832{
833 struct hist_entry *p_right, *p_left;
834
835 p_left = get_pair_data(left, &data__files[sort_idx]);
836 p_right = get_pair_data(right, &data__files[sort_idx]);
837
838 if (!p_left && !p_right)
839 return 0;
840
841 if (!p_left || !p_right)
842 return p_left ? -1 : 1;
843
844 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
845 /*
846 * The delta can be computed without the baseline, but
847 * others are not. Put those entries which have no
848 * values below.
849 */
850 if (left->dummy && right->dummy)
851 return 0;
852
853 if (left->dummy || right->dummy)
854 return left->dummy ? 1 : -1;
855 }
856
857 return __hist_entry__cmp_compute(p_left, p_right, c);
858}
859
860static int64_t
861hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
862 struct hist_entry *left __maybe_unused,
863 struct hist_entry *right __maybe_unused)
864{
865 return 0;
866}
867
868static int64_t
869hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
870 struct hist_entry *left, struct hist_entry *right)
871{
872 if (left->stat.period == right->stat.period)
873 return 0;
874 return left->stat.period > right->stat.period ? 1 : -1;
875}
876
877static int64_t
878hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
879 struct hist_entry *left, struct hist_entry *right)
880{
881 struct data__file *d = fmt_to_data_file(fmt);
882
883 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
884}
885
886static int64_t
887hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
888 struct hist_entry *left, struct hist_entry *right)
889{
890 struct data__file *d = fmt_to_data_file(fmt);
891
892 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
893}
894
895static int64_t
896hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
897 struct hist_entry *left, struct hist_entry *right)
898{
899 struct data__file *d = fmt_to_data_file(fmt);
900
901 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
902}
903
904static int64_t
905hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
906 struct hist_entry *left, struct hist_entry *right)
907{
908 struct data__file *d = fmt_to_data_file(fmt);
909
910 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
911}
912
913static int64_t
914hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
915 struct hist_entry *left, struct hist_entry *right)
916{
917 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
918 sort_compute);
919}
920
921static int64_t
922hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
923 struct hist_entry *left, struct hist_entry *right)
924{
925 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
926 sort_compute);
927}
928
929static int64_t
930hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
931 struct hist_entry *left, struct hist_entry *right)
932{
933 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
934 sort_compute);
935}
936
937static int64_t
938hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
939 struct hist_entry *left, struct hist_entry *right)
940{
941 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
942 sort_compute);
943}
944
945static void hists__process(struct hists *hists)
946{
947 if (show_baseline_only)
948 hists__baseline_only(hists);
949
950 hists__precompute(hists);
951 hists__output_resort(hists, NULL);
952
953 if (compute == COMPUTE_CYCLES)
954 symbol_conf.report_block = true;
955
956 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
957 !symbol_conf.use_callchain);
958}
959
960static void data__fprintf(void)
961{
962 struct data__file *d;
963 int i;
964
965 fprintf(stdout, "# Data files:\n");
966
967 data__for_each_file(i, d)
968 fprintf(stdout, "# [%d] %s %s\n",
969 d->idx, d->data.path,
970 !d->idx ? "(Baseline)" : "");
971
972 fprintf(stdout, "#\n");
973}
974
975static void data_process(void)
976{
977 struct evlist *evlist_base = data__files[0].session->evlist;
978 struct evsel *evsel_base;
979 bool first = true;
980
981 evlist__for_each_entry(evlist_base, evsel_base) {
982 struct hists *hists_base = evsel__hists(evsel_base);
983 struct data__file *d;
984 int i;
985
986 data__for_each_file_new(i, d) {
987 struct evlist *evlist = d->session->evlist;
988 struct evsel *evsel;
989 struct hists *hists;
990
991 evsel = evsel_match(evsel_base, evlist);
992 if (!evsel)
993 continue;
994
995 hists = evsel__hists(evsel);
996 d->hists = hists;
997
998 hists__match(hists_base, hists);
999
1000 if (!show_baseline_only)
1001 hists__link(hists_base, hists);
1002 }
1003
1004 if (!quiet) {
1005 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
1006 evsel__name(evsel_base));
1007 }
1008
1009 first = false;
1010
1011 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
1012 data__fprintf();
1013
1014 /* Don't sort callchain for perf diff */
1015 evsel__reset_sample_bit(evsel_base, CALLCHAIN);
1016
1017 hists__process(hists_base);
1018 }
1019}
1020
1021static int process_base_stream(struct data__file *data_base,
1022 struct data__file *data_pair,
1023 const char *title __maybe_unused)
1024{
1025 struct evlist *evlist_base = data_base->session->evlist;
1026 struct evlist *evlist_pair = data_pair->session->evlist;
1027 struct evsel *evsel_base, *evsel_pair;
1028 struct evsel_streams *es_base, *es_pair;
1029
1030 evlist__for_each_entry(evlist_base, evsel_base) {
1031 evsel_pair = evsel_match(evsel_base, evlist_pair);
1032 if (!evsel_pair)
1033 continue;
1034
1035 es_base = evsel_streams__entry(data_base->evlist_streams,
1036 evsel_base->core.idx);
1037 if (!es_base)
1038 return -1;
1039
1040 es_pair = evsel_streams__entry(data_pair->evlist_streams,
1041 evsel_pair->core.idx);
1042 if (!es_pair)
1043 return -1;
1044
1045 evsel_streams__match(es_base, es_pair);
1046 evsel_streams__report(es_base, es_pair);
1047 }
1048
1049 return 0;
1050}
1051
1052static void stream_process(void)
1053{
1054 /*
1055 * Stream comparison only supports two data files.
1056 * perf.data.old and perf.data. data__files[0] is perf.data.old,
1057 * data__files[1] is perf.data.
1058 */
1059 process_base_stream(&data__files[0], &data__files[1],
1060 "# Output based on old perf data:\n#\n");
1061}
1062
1063static void data__free(struct data__file *d)
1064{
1065 int col;
1066
1067 if (d->evlist_streams)
1068 evlist_streams__delete(d->evlist_streams);
1069
1070 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
1071 struct diff_hpp_fmt *fmt = &d->fmt[col];
1072
1073 zfree(&fmt->header);
1074 }
1075}
1076
1077static int abstime_str_dup(char **pstr)
1078{
1079 char *str = NULL;
1080
1081 if (pdiff.time_str && strchr(pdiff.time_str, ':')) {
1082 str = strdup(pdiff.time_str);
1083 if (!str)
1084 return -ENOMEM;
1085 }
1086
1087 *pstr = str;
1088 return 0;
1089}
1090
1091static int parse_absolute_time(struct data__file *d, char **pstr)
1092{
1093 char *p = *pstr;
1094 int ret;
1095
1096 /*
1097 * Absolute timestamp for one file has the format: a.b,c.d
1098 * For multiple files, the format is: a.b,c.d:a.b,c.d
1099 */
1100 p = strchr(*pstr, ':');
1101 if (p) {
1102 if (p == *pstr) {
1103 pr_err("Invalid time string\n");
1104 return -EINVAL;
1105 }
1106
1107 *p = 0;
1108 p++;
1109 if (*p == 0) {
1110 pr_err("Invalid time string\n");
1111 return -EINVAL;
1112 }
1113 }
1114
1115 ret = perf_time__parse_for_ranges(*pstr, d->session,
1116 &pdiff.ptime_range,
1117 &pdiff.range_size,
1118 &pdiff.range_num);
1119 if (ret < 0)
1120 return ret;
1121
1122 if (!p || *p == 0)
1123 *pstr = NULL;
1124 else
1125 *pstr = p;
1126
1127 return ret;
1128}
1129
1130static int parse_percent_time(struct data__file *d)
1131{
1132 int ret;
1133
1134 ret = perf_time__parse_for_ranges(pdiff.time_str, d->session,
1135 &pdiff.ptime_range,
1136 &pdiff.range_size,
1137 &pdiff.range_num);
1138 return ret;
1139}
1140
1141static int parse_time_str(struct data__file *d, char *abstime_ostr,
1142 char **pabstime_tmp)
1143{
1144 int ret = 0;
1145
1146 if (abstime_ostr)
1147 ret = parse_absolute_time(d, pabstime_tmp);
1148 else if (pdiff.time_str)
1149 ret = parse_percent_time(d);
1150
1151 return ret;
1152}
1153
1154static int check_file_brstack(void)
1155{
1156 struct data__file *d;
1157 bool has_br_stack;
1158 int i;
1159
1160 data__for_each_file(i, d) {
1161 d->session = perf_session__new(&d->data, &pdiff.tool);
1162 if (IS_ERR(d->session)) {
1163 pr_err("Failed to open %s\n", d->data.path);
1164 return PTR_ERR(d->session);
1165 }
1166
1167 has_br_stack = perf_header__has_feat(&d->session->header,
1168 HEADER_BRANCH_STACK);
1169 perf_session__delete(d->session);
1170 if (!has_br_stack)
1171 return 0;
1172 }
1173
1174 /* Set only all files having branch stacks */
1175 pdiff.has_br_stack = true;
1176 return 0;
1177}
1178
1179static int __cmd_diff(void)
1180{
1181 struct data__file *d;
1182 int ret, i;
1183 char *abstime_ostr, *abstime_tmp;
1184
1185 ret = abstime_str_dup(&abstime_ostr);
1186 if (ret)
1187 return ret;
1188
1189 abstime_tmp = abstime_ostr;
1190 ret = -EINVAL;
1191
1192 data__for_each_file(i, d) {
1193 d->session = perf_session__new(&d->data, &pdiff.tool);
1194 if (IS_ERR(d->session)) {
1195 ret = PTR_ERR(d->session);
1196 pr_err("Failed to open %s\n", d->data.path);
1197 goto out_delete;
1198 }
1199
1200 if (pdiff.time_str) {
1201 ret = parse_time_str(d, abstime_ostr, &abstime_tmp);
1202 if (ret < 0)
1203 goto out_delete;
1204 }
1205
1206 if (cpu_list) {
1207 ret = perf_session__cpu_bitmap(d->session, cpu_list,
1208 cpu_bitmap);
1209 if (ret < 0)
1210 goto out_delete;
1211 }
1212
1213 ret = perf_session__process_events(d->session);
1214 if (ret) {
1215 pr_err("Failed to process %s\n", d->data.path);
1216 goto out_delete;
1217 }
1218
1219 evlist__collapse_resort(d->session->evlist);
1220
1221 if (pdiff.ptime_range)
1222 zfree(&pdiff.ptime_range);
1223
1224 if (compute == COMPUTE_STREAM) {
1225 d->evlist_streams = evlist__create_streams(
1226 d->session->evlist, 5);
1227 if (!d->evlist_streams) {
1228 ret = -ENOMEM;
1229 goto out_delete;
1230 }
1231 }
1232 }
1233
1234 if (compute == COMPUTE_STREAM)
1235 stream_process();
1236 else
1237 data_process();
1238
1239 out_delete:
1240 data__for_each_file(i, d) {
1241 if (!IS_ERR(d->session))
1242 perf_session__delete(d->session);
1243 data__free(d);
1244 }
1245
1246 free(data__files);
1247
1248 if (pdiff.ptime_range)
1249 zfree(&pdiff.ptime_range);
1250
1251 if (abstime_ostr)
1252 free(abstime_ostr);
1253
1254 return ret;
1255}
1256
1257static const char * const diff_usage[] = {
1258 "perf diff [<options>] [old_file] [new_file]",
1259 NULL,
1260};
1261
1262static const struct option options[] = {
1263 OPT_INCR('v', "verbose", &verbose,
1264 "be more verbose (show symbol address, etc)"),
1265 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any warnings or messages"),
1266 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
1267 "Show only items with match in baseline"),
1268 OPT_CALLBACK('c', "compute", &compute,
1269 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs),cycles",
1270 "Entries differential computation selection",
1271 setup_compute),
1272 OPT_BOOLEAN('p', "period", &show_period,
1273 "Show period values."),
1274 OPT_BOOLEAN('F', "formula", &show_formula,
1275 "Show formula."),
1276 OPT_BOOLEAN(0, "cycles-hist", &cycles_hist,
1277 "Show cycles histogram and standard deviation "
1278 "- WARNING: use only with -c cycles."),
1279 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1280 "dump raw trace in ASCII"),
1281 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
1282 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1283 "file", "kallsyms pathname"),
1284 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
1285 "load module symbols - WARNING: use only with -k and LIVE kernel"),
1286 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1287 "only consider symbols in these dsos"),
1288 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1289 "only consider symbols in these comms"),
1290 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1291 "only consider these symbols"),
1292 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1293 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1294 " Please refer the man page for the complete list."),
1295 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
1296 "separator for columns, no spaces will be added between "
1297 "columns '.' is reserved."),
1298 OPT_CALLBACK(0, "symfs", NULL, "directory",
1299 "Look for files with symbols relative to this directory",
1300 symbol__config_symfs),
1301 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
1302 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1303 "How to display percentage of filtered entries", parse_filter_percentage),
1304 OPT_STRING(0, "time", &pdiff.time_str, "str",
1305 "Time span (time percent or absolute timestamp)"),
1306 OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1307 OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
1308 "only consider symbols in these pids"),
1309 OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
1310 "only consider symbols in these tids"),
1311 OPT_BOOLEAN(0, "stream", &pdiff.stream,
1312 "Enable hot streams comparison."),
1313 OPT_END()
1314};
1315
1316static double baseline_percent(struct hist_entry *he)
1317{
1318 u64 total = hists__total_period(he->hists);
1319
1320 return 100.0 * he->stat.period / total;
1321}
1322
1323static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
1324 struct perf_hpp *hpp, struct hist_entry *he)
1325{
1326 struct diff_hpp_fmt *dfmt =
1327 container_of(fmt, struct diff_hpp_fmt, fmt);
1328 double percent = baseline_percent(he);
1329 char pfmt[20] = " ";
1330
1331 if (!he->dummy) {
1332 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
1333 return percent_color_snprintf(hpp->buf, hpp->size,
1334 pfmt, percent);
1335 } else
1336 return scnprintf(hpp->buf, hpp->size, "%*s",
1337 dfmt->header_width, pfmt);
1338}
1339
1340static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
1341{
1342 double percent = baseline_percent(he);
1343 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
1344 int ret = 0;
1345
1346 if (!he->dummy)
1347 ret = scnprintf(buf, size, fmt, percent);
1348
1349 return ret;
1350}
1351
1352static int cycles_printf(struct hist_entry *he, struct hist_entry *pair,
1353 struct perf_hpp *hpp, int width)
1354{
1355 struct block_hist *bh = container_of(he, struct block_hist, he);
1356 struct block_hist *bh_pair = container_of(pair, struct block_hist, he);
1357 struct hist_entry *block_he;
1358 struct block_info *bi;
1359 char buf[128];
1360 char *start_line, *end_line;
1361
1362 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1363 if (!block_he) {
1364 hpp->skip = true;
1365 return 0;
1366 }
1367
1368 /*
1369 * Avoid printing the warning "addr2line_init failed for ..."
1370 */
1371 symbol_conf.disable_add2line_warn = true;
1372
1373 bi = block_he->block_info;
1374
1375 start_line = map__srcline(he->ms.map, bi->sym->start + bi->start,
1376 he->ms.sym);
1377
1378 end_line = map__srcline(he->ms.map, bi->sym->start + bi->end,
1379 he->ms.sym);
1380
1381 if (start_line != SRCLINE_UNKNOWN &&
1382 end_line != SRCLINE_UNKNOWN) {
1383 scnprintf(buf, sizeof(buf), "[%s -> %s] %4ld",
1384 start_line, end_line, block_he->diff.cycles);
1385 } else {
1386 scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld",
1387 bi->start, bi->end, block_he->diff.cycles);
1388 }
1389
1390 zfree_srcline(&start_line);
1391 zfree_srcline(&end_line);
1392
1393 return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
1394}
1395
1396static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
1397 struct perf_hpp *hpp, struct hist_entry *he,
1398 int comparison_method)
1399{
1400 struct diff_hpp_fmt *dfmt =
1401 container_of(fmt, struct diff_hpp_fmt, fmt);
1402 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1403 double diff;
1404 s64 wdiff;
1405 char pfmt[20] = " ";
1406
1407 if (!pair) {
1408 if (comparison_method == COMPUTE_CYCLES) {
1409 struct block_hist *bh;
1410
1411 bh = container_of(he, struct block_hist, he);
1412 if (bh->block_idx)
1413 hpp->skip = true;
1414 }
1415
1416 goto no_print;
1417 }
1418
1419 switch (comparison_method) {
1420 case COMPUTE_DELTA:
1421 if (pair->diff.computed)
1422 diff = pair->diff.period_ratio_delta;
1423 else
1424 diff = compute_delta(he, pair);
1425
1426 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
1427 return percent_color_snprintf(hpp->buf, hpp->size,
1428 pfmt, diff);
1429 case COMPUTE_RATIO:
1430 if (he->dummy)
1431 goto dummy_print;
1432 if (pair->diff.computed)
1433 diff = pair->diff.period_ratio;
1434 else
1435 diff = compute_ratio(he, pair);
1436
1437 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
1438 return value_color_snprintf(hpp->buf, hpp->size,
1439 pfmt, diff);
1440 case COMPUTE_WEIGHTED_DIFF:
1441 if (he->dummy)
1442 goto dummy_print;
1443 if (pair->diff.computed)
1444 wdiff = pair->diff.wdiff;
1445 else
1446 wdiff = compute_wdiff(he, pair);
1447
1448 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
1449 return color_snprintf(hpp->buf, hpp->size,
1450 get_percent_color(wdiff),
1451 pfmt, wdiff);
1452 case COMPUTE_CYCLES:
1453 return cycles_printf(he, pair, hpp, dfmt->header_width);
1454 default:
1455 BUG_ON(1);
1456 }
1457dummy_print:
1458 return scnprintf(hpp->buf, hpp->size, "%*s",
1459 dfmt->header_width, "N/A");
1460no_print:
1461 return scnprintf(hpp->buf, hpp->size, "%*s",
1462 dfmt->header_width, pfmt);
1463}
1464
1465static int hpp__color_delta(struct perf_hpp_fmt *fmt,
1466 struct perf_hpp *hpp, struct hist_entry *he)
1467{
1468 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
1469}
1470
1471static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
1472 struct perf_hpp *hpp, struct hist_entry *he)
1473{
1474 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
1475}
1476
1477static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
1478 struct perf_hpp *hpp, struct hist_entry *he)
1479{
1480 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
1481}
1482
1483static int hpp__color_cycles(struct perf_hpp_fmt *fmt,
1484 struct perf_hpp *hpp, struct hist_entry *he)
1485{
1486 return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);
1487}
1488
1489static int all_zero(unsigned long *vals, int len)
1490{
1491 int i;
1492
1493 for (i = 0; i < len; i++)
1494 if (vals[i] != 0)
1495 return 0;
1496 return 1;
1497}
1498
1499static int print_cycles_spark(char *bf, int size, unsigned long *svals, u64 n)
1500{
1501 int printed;
1502
1503 if (n <= 1)
1504 return 0;
1505
1506 if (n > NUM_SPARKS)
1507 n = NUM_SPARKS;
1508 if (all_zero(svals, n))
1509 return 0;
1510
1511 printed = print_spark(bf, size, svals, n);
1512 printed += scnprintf(bf + printed, size - printed, " ");
1513 return printed;
1514}
1515
1516static int hpp__color_cycles_hist(struct perf_hpp_fmt *fmt,
1517 struct perf_hpp *hpp, struct hist_entry *he)
1518{
1519 struct diff_hpp_fmt *dfmt =
1520 container_of(fmt, struct diff_hpp_fmt, fmt);
1521 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1522 struct block_hist *bh = container_of(he, struct block_hist, he);
1523 struct block_hist *bh_pair;
1524 struct hist_entry *block_he;
1525 char spark[32], buf[128];
1526 double r;
1527 int ret, pad;
1528
1529 if (!pair) {
1530 if (bh->block_idx)
1531 hpp->skip = true;
1532
1533 goto no_print;
1534 }
1535
1536 bh_pair = container_of(pair, struct block_hist, he);
1537
1538 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1539 if (!block_he) {
1540 hpp->skip = true;
1541 goto no_print;
1542 }
1543
1544 ret = print_cycles_spark(spark, sizeof(spark), block_he->diff.svals,
1545 block_he->diff.stats.n);
1546
1547 r = rel_stddev_stats(stddev_stats(&block_he->diff.stats),
1548 avg_stats(&block_he->diff.stats));
1549
1550 if (ret) {
1551 /*
1552 * Padding spaces if number of sparks less than NUM_SPARKS
1553 * otherwise the output is not aligned.
1554 */
1555 pad = NUM_SPARKS - ((ret - 1) / 3);
1556 scnprintf(buf, sizeof(buf), "%s%5.1f%% %s", "\u00B1", r, spark);
1557 ret = scnprintf(hpp->buf, hpp->size, "%*s",
1558 dfmt->header_width, buf);
1559
1560 if (pad) {
1561 ret += scnprintf(hpp->buf + ret, hpp->size - ret,
1562 "%-*s", pad, " ");
1563 }
1564
1565 return ret;
1566 }
1567
1568no_print:
1569 return scnprintf(hpp->buf, hpp->size, "%*s",
1570 dfmt->header_width, " ");
1571}
1572
1573static void
1574hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
1575{
1576 switch (idx) {
1577 case PERF_HPP_DIFF__PERIOD_BASELINE:
1578 scnprintf(buf, size, "%" PRIu64, he->stat.period);
1579 break;
1580
1581 default:
1582 break;
1583 }
1584}
1585
1586static void
1587hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
1588 int idx, char *buf, size_t size)
1589{
1590 double diff;
1591 double ratio;
1592 s64 wdiff;
1593
1594 switch (idx) {
1595 case PERF_HPP_DIFF__DELTA:
1596 case PERF_HPP_DIFF__DELTA_ABS:
1597 if (pair->diff.computed)
1598 diff = pair->diff.period_ratio_delta;
1599 else
1600 diff = compute_delta(he, pair);
1601
1602 scnprintf(buf, size, "%+4.2F%%", diff);
1603 break;
1604
1605 case PERF_HPP_DIFF__RATIO:
1606 /* No point for ratio number if we are dummy.. */
1607 if (he->dummy) {
1608 scnprintf(buf, size, "N/A");
1609 break;
1610 }
1611
1612 if (pair->diff.computed)
1613 ratio = pair->diff.period_ratio;
1614 else
1615 ratio = compute_ratio(he, pair);
1616
1617 if (ratio > 0.0)
1618 scnprintf(buf, size, "%14.6F", ratio);
1619 break;
1620
1621 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1622 /* No point for wdiff number if we are dummy.. */
1623 if (he->dummy) {
1624 scnprintf(buf, size, "N/A");
1625 break;
1626 }
1627
1628 if (pair->diff.computed)
1629 wdiff = pair->diff.wdiff;
1630 else
1631 wdiff = compute_wdiff(he, pair);
1632
1633 if (wdiff != 0)
1634 scnprintf(buf, size, "%14ld", wdiff);
1635 break;
1636
1637 case PERF_HPP_DIFF__FORMULA:
1638 formula_fprintf(he, pair, buf, size);
1639 break;
1640
1641 case PERF_HPP_DIFF__PERIOD:
1642 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1643 break;
1644
1645 default:
1646 BUG_ON(1);
1647 }
1648}
1649
1650static void
1651__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1652 char *buf, size_t size)
1653{
1654 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1655 int idx = dfmt->idx;
1656
1657 /* baseline is special */
1658 if (idx == PERF_HPP_DIFF__BASELINE)
1659 hpp__entry_baseline(he, buf, size);
1660 else {
1661 if (pair)
1662 hpp__entry_pair(he, pair, idx, buf, size);
1663 else
1664 hpp__entry_unpair(he, idx, buf, size);
1665 }
1666}
1667
1668static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1669 struct hist_entry *he)
1670{
1671 struct diff_hpp_fmt *dfmt =
1672 container_of(_fmt, struct diff_hpp_fmt, fmt);
1673 char buf[MAX_COL_WIDTH] = " ";
1674
1675 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1676
1677 if (symbol_conf.field_sep)
1678 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1679 else
1680 return scnprintf(hpp->buf, hpp->size, "%*s",
1681 dfmt->header_width, buf);
1682}
1683
1684static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1685 struct hists *hists __maybe_unused,
1686 int line __maybe_unused,
1687 int *span __maybe_unused)
1688{
1689 struct diff_hpp_fmt *dfmt =
1690 container_of(fmt, struct diff_hpp_fmt, fmt);
1691
1692 BUG_ON(!dfmt->header);
1693 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1694}
1695
1696static int hpp__width(struct perf_hpp_fmt *fmt,
1697 struct perf_hpp *hpp __maybe_unused,
1698 struct hists *hists __maybe_unused)
1699{
1700 struct diff_hpp_fmt *dfmt =
1701 container_of(fmt, struct diff_hpp_fmt, fmt);
1702
1703 BUG_ON(dfmt->header_width <= 0);
1704 return dfmt->header_width;
1705}
1706
1707static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1708{
1709#define MAX_HEADER_NAME 100
1710 char buf_indent[MAX_HEADER_NAME];
1711 char buf[MAX_HEADER_NAME];
1712 const char *header = NULL;
1713 int width = 0;
1714
1715 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1716 header = columns[dfmt->idx].name;
1717 width = columns[dfmt->idx].width;
1718
1719 /* Only our defined HPP fmts should appear here. */
1720 BUG_ON(!header);
1721
1722 if (data__files_cnt > 2)
1723 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1724
1725#define NAME (data__files_cnt > 2 ? buf : header)
1726 dfmt->header_width = width;
1727 width = (int) strlen(NAME);
1728 if (dfmt->header_width < width)
1729 dfmt->header_width = width;
1730
1731 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1732 dfmt->header_width, NAME);
1733
1734 dfmt->header = strdup(buf_indent);
1735#undef MAX_HEADER_NAME
1736#undef NAME
1737}
1738
1739static void data__hpp_register(struct data__file *d, int idx)
1740{
1741 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1742 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1743
1744 dfmt->idx = idx;
1745
1746 fmt->header = hpp__header;
1747 fmt->width = hpp__width;
1748 fmt->entry = hpp__entry_global;
1749 fmt->cmp = hist_entry__cmp_nop;
1750 fmt->collapse = hist_entry__cmp_nop;
1751
1752 /* TODO more colors */
1753 switch (idx) {
1754 case PERF_HPP_DIFF__BASELINE:
1755 fmt->color = hpp__color_baseline;
1756 fmt->sort = hist_entry__cmp_baseline;
1757 break;
1758 case PERF_HPP_DIFF__DELTA:
1759 fmt->color = hpp__color_delta;
1760 fmt->sort = hist_entry__cmp_delta;
1761 break;
1762 case PERF_HPP_DIFF__RATIO:
1763 fmt->color = hpp__color_ratio;
1764 fmt->sort = hist_entry__cmp_ratio;
1765 break;
1766 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1767 fmt->color = hpp__color_wdiff;
1768 fmt->sort = hist_entry__cmp_wdiff;
1769 break;
1770 case PERF_HPP_DIFF__DELTA_ABS:
1771 fmt->color = hpp__color_delta;
1772 fmt->sort = hist_entry__cmp_delta_abs;
1773 break;
1774 case PERF_HPP_DIFF__CYCLES:
1775 fmt->color = hpp__color_cycles;
1776 fmt->sort = hist_entry__cmp_nop;
1777 break;
1778 case PERF_HPP_DIFF__CYCLES_HIST:
1779 fmt->color = hpp__color_cycles_hist;
1780 fmt->sort = hist_entry__cmp_nop;
1781 break;
1782 default:
1783 fmt->sort = hist_entry__cmp_nop;
1784 break;
1785 }
1786
1787 init_header(d, dfmt);
1788 perf_hpp__column_register(fmt);
1789 perf_hpp__register_sort_field(fmt);
1790}
1791
1792static int ui_init(void)
1793{
1794 struct data__file *d;
1795 struct perf_hpp_fmt *fmt;
1796 int i;
1797
1798 data__for_each_file(i, d) {
1799
1800 /*
1801 * Baseline or compute related columns:
1802 *
1803 * PERF_HPP_DIFF__BASELINE
1804 * PERF_HPP_DIFF__DELTA
1805 * PERF_HPP_DIFF__RATIO
1806 * PERF_HPP_DIFF__WEIGHTED_DIFF
1807 * PERF_HPP_DIFF__CYCLES
1808 */
1809 data__hpp_register(d, i ? compute_2_hpp[compute] :
1810 PERF_HPP_DIFF__BASELINE);
1811
1812 if (cycles_hist && i)
1813 data__hpp_register(d, PERF_HPP_DIFF__CYCLES_HIST);
1814
1815 /*
1816 * And the rest:
1817 *
1818 * PERF_HPP_DIFF__FORMULA
1819 * PERF_HPP_DIFF__PERIOD
1820 * PERF_HPP_DIFF__PERIOD_BASELINE
1821 */
1822 if (show_formula && i)
1823 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1824
1825 if (show_period)
1826 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1827 PERF_HPP_DIFF__PERIOD_BASELINE);
1828 }
1829
1830 if (!sort_compute)
1831 return 0;
1832
1833 /*
1834 * Prepend an fmt to sort on columns at 'sort_compute' first.
1835 * This fmt is added only to the sort list but not to the
1836 * output fields list.
1837 *
1838 * Note that this column (data) can be compared twice - one
1839 * for this 'sort_compute' fmt and another for the normal
1840 * diff_hpp_fmt. But it shouldn't a problem as most entries
1841 * will be sorted out by first try or baseline and comparing
1842 * is not a costly operation.
1843 */
1844 fmt = zalloc(sizeof(*fmt));
1845 if (fmt == NULL) {
1846 pr_err("Memory allocation failed\n");
1847 return -1;
1848 }
1849
1850 fmt->cmp = hist_entry__cmp_nop;
1851 fmt->collapse = hist_entry__cmp_nop;
1852
1853 switch (compute) {
1854 case COMPUTE_DELTA:
1855 fmt->sort = hist_entry__cmp_delta_idx;
1856 break;
1857 case COMPUTE_RATIO:
1858 fmt->sort = hist_entry__cmp_ratio_idx;
1859 break;
1860 case COMPUTE_WEIGHTED_DIFF:
1861 fmt->sort = hist_entry__cmp_wdiff_idx;
1862 break;
1863 case COMPUTE_DELTA_ABS:
1864 fmt->sort = hist_entry__cmp_delta_abs_idx;
1865 break;
1866 case COMPUTE_CYCLES:
1867 /*
1868 * Should set since 'fmt->sort' is called without
1869 * checking valid during sorting
1870 */
1871 fmt->sort = hist_entry__cmp_nop;
1872 break;
1873 default:
1874 BUG_ON(1);
1875 }
1876
1877 perf_hpp__prepend_sort_field(fmt);
1878 return 0;
1879}
1880
1881static int data_init(int argc, const char **argv)
1882{
1883 struct data__file *d;
1884 static const char *defaults[] = {
1885 "perf.data.old",
1886 "perf.data",
1887 };
1888 bool use_default = true;
1889 int i;
1890
1891 data__files_cnt = 2;
1892
1893 if (argc) {
1894 if (argc == 1)
1895 defaults[1] = argv[0];
1896 else {
1897 data__files_cnt = argc;
1898 use_default = false;
1899 }
1900 } else if (perf_guest) {
1901 defaults[0] = "perf.data.host";
1902 defaults[1] = "perf.data.guest";
1903 }
1904
1905 if (sort_compute >= (unsigned int) data__files_cnt) {
1906 pr_err("Order option out of limit.\n");
1907 return -EINVAL;
1908 }
1909
1910 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1911 if (!data__files)
1912 return -ENOMEM;
1913
1914 data__for_each_file(i, d) {
1915 struct perf_data *data = &d->data;
1916
1917 data->path = use_default ? defaults[i] : argv[i];
1918 data->mode = PERF_DATA_MODE_READ;
1919 data->force = force;
1920
1921 d->idx = i;
1922 }
1923
1924 return 0;
1925}
1926
1927static int diff__config(const char *var, const char *value,
1928 void *cb __maybe_unused)
1929{
1930 if (!strcmp(var, "diff.order")) {
1931 int ret;
1932 if (perf_config_int(&ret, var, value) < 0)
1933 return -1;
1934 sort_compute = ret;
1935 return 0;
1936 }
1937 if (!strcmp(var, "diff.compute")) {
1938 if (!strcmp(value, "delta")) {
1939 compute = COMPUTE_DELTA;
1940 } else if (!strcmp(value, "delta-abs")) {
1941 compute = COMPUTE_DELTA_ABS;
1942 } else if (!strcmp(value, "ratio")) {
1943 compute = COMPUTE_RATIO;
1944 } else if (!strcmp(value, "wdiff")) {
1945 compute = COMPUTE_WEIGHTED_DIFF;
1946 } else {
1947 pr_err("Invalid compute method: %s\n", value);
1948 return -1;
1949 }
1950 }
1951
1952 return 0;
1953}
1954
1955int cmd_diff(int argc, const char **argv)
1956{
1957 int ret = hists__init();
1958
1959 if (ret < 0)
1960 return ret;
1961
1962 perf_config(diff__config, NULL);
1963
1964 argc = parse_options(argc, argv, options, diff_usage, 0);
1965
1966 if (quiet)
1967 perf_quiet_option();
1968
1969 if (cycles_hist && (compute != COMPUTE_CYCLES))
1970 usage_with_options(diff_usage, options);
1971
1972 if (pdiff.stream)
1973 compute = COMPUTE_STREAM;
1974
1975 symbol__annotation_init();
1976
1977 if (symbol__init(NULL) < 0)
1978 return -1;
1979
1980 if (data_init(argc, argv) < 0)
1981 return -1;
1982
1983 if (check_file_brstack() < 0)
1984 return -1;
1985
1986 if ((compute == COMPUTE_CYCLES || compute == COMPUTE_STREAM)
1987 && !pdiff.has_br_stack) {
1988 return -1;
1989 }
1990
1991 if (compute == COMPUTE_STREAM) {
1992 symbol_conf.show_branchflag_count = true;
1993 symbol_conf.disable_add2line_warn = true;
1994 callchain_param.mode = CHAIN_FLAT;
1995 callchain_param.key = CCKEY_SRCLINE;
1996 callchain_param.branch_callstack = 1;
1997 symbol_conf.use_callchain = true;
1998 callchain_register_param(&callchain_param);
1999 sort_order = "srcline,symbol,dso";
2000 } else {
2001 if (ui_init() < 0)
2002 return -1;
2003
2004 sort__mode = SORT_MODE__DIFF;
2005 }
2006
2007 if (setup_sorting(NULL) < 0)
2008 usage_with_options(diff_usage, options);
2009
2010 setup_pager();
2011
2012 sort__setup_elide(NULL);
2013
2014 return __cmd_diff();
2015}