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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 char diff__default_sort_order[] = "dso,symbol";
64static bool force;
65static bool show_period;
66static bool show_formula;
67static bool show_baseline_only;
68static unsigned int sort_compute;
69
70static s64 compute_wdiff_w1;
71static s64 compute_wdiff_w2;
72
73enum {
74 COMPUTE_DELTA,
75 COMPUTE_RATIO,
76 COMPUTE_WEIGHTED_DIFF,
77 COMPUTE_MAX,
78};
79
80const char *compute_names[COMPUTE_MAX] = {
81 [COMPUTE_DELTA] = "delta",
82 [COMPUTE_RATIO] = "ratio",
83 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
84};
85
86static int compute;
87
88static int compute_2_hpp[COMPUTE_MAX] = {
89 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
90 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
91 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
92};
93
94#define MAX_COL_WIDTH 70
95
96static struct header_column {
97 const char *name;
98 int width;
99} columns[PERF_HPP_DIFF__MAX_INDEX] = {
100 [PERF_HPP_DIFF__BASELINE] = {
101 .name = "Baseline",
102 },
103 [PERF_HPP_DIFF__PERIOD] = {
104 .name = "Period",
105 .width = 14,
106 },
107 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
108 .name = "Base period",
109 .width = 14,
110 },
111 [PERF_HPP_DIFF__DELTA] = {
112 .name = "Delta",
113 .width = 7,
114 },
115 [PERF_HPP_DIFF__RATIO] = {
116 .name = "Ratio",
117 .width = 14,
118 },
119 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
120 .name = "Weighted diff",
121 .width = 14,
122 },
123 [PERF_HPP_DIFF__FORMULA] = {
124 .name = "Formula",
125 .width = MAX_COL_WIDTH,
126 }
127};
128
129static int setup_compute_opt_wdiff(char *opt)
130{
131 char *w1_str = opt;
132 char *w2_str;
133
134 int ret = -EINVAL;
135
136 if (!opt)
137 goto out;
138
139 w2_str = strchr(opt, ',');
140 if (!w2_str)
141 goto out;
142
143 *w2_str++ = 0x0;
144 if (!*w2_str)
145 goto out;
146
147 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
148 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
149
150 if (!compute_wdiff_w1 || !compute_wdiff_w2)
151 goto out;
152
153 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
154 compute_wdiff_w1, compute_wdiff_w2);
155
156 ret = 0;
157
158 out:
159 if (ret)
160 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
161
162 return ret;
163}
164
165static int setup_compute_opt(char *opt)
166{
167 if (compute == COMPUTE_WEIGHTED_DIFF)
168 return setup_compute_opt_wdiff(opt);
169
170 if (opt) {
171 pr_err("Failed: extra option specified '%s'", opt);
172 return -EINVAL;
173 }
174
175 return 0;
176}
177
178static int setup_compute(const struct option *opt, const char *str,
179 int unset __maybe_unused)
180{
181 int *cp = (int *) opt->value;
182 char *cstr = (char *) str;
183 char buf[50];
184 unsigned i;
185 char *option;
186
187 if (!str) {
188 *cp = COMPUTE_DELTA;
189 return 0;
190 }
191
192 option = strchr(str, ':');
193 if (option) {
194 unsigned len = option++ - str;
195
196 /*
197 * The str data are not writeable, so we need
198 * to use another buffer.
199 */
200
201 /* No option value is longer. */
202 if (len >= sizeof(buf))
203 return -EINVAL;
204
205 strncpy(buf, str, len);
206 buf[len] = 0x0;
207 cstr = buf;
208 }
209
210 for (i = 0; i < COMPUTE_MAX; i++)
211 if (!strcmp(cstr, compute_names[i])) {
212 *cp = i;
213 return setup_compute_opt(option);
214 }
215
216 pr_err("Failed: '%s' is not computation method "
217 "(use 'delta','ratio' or 'wdiff')\n", str);
218 return -EINVAL;
219}
220
221static double period_percent(struct hist_entry *he, u64 period)
222{
223 u64 total = he->hists->stats.total_period;
224 return (period * 100.0) / total;
225}
226
227static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
228{
229 double old_percent = period_percent(he, he->stat.period);
230 double new_percent = period_percent(pair, pair->stat.period);
231
232 pair->diff.period_ratio_delta = new_percent - old_percent;
233 pair->diff.computed = true;
234 return pair->diff.period_ratio_delta;
235}
236
237static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
238{
239 double old_period = he->stat.period ?: 1;
240 double new_period = pair->stat.period;
241
242 pair->diff.computed = true;
243 pair->diff.period_ratio = new_period / old_period;
244 return pair->diff.period_ratio;
245}
246
247static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
248{
249 u64 old_period = he->stat.period;
250 u64 new_period = pair->stat.period;
251
252 pair->diff.computed = true;
253 pair->diff.wdiff = new_period * compute_wdiff_w2 -
254 old_period * compute_wdiff_w1;
255
256 return pair->diff.wdiff;
257}
258
259static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
260 char *buf, size_t size)
261{
262 return scnprintf(buf, size,
263 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
264 "(%" PRIu64 " * 100 / %" PRIu64 ")",
265 pair->stat.period, pair->hists->stats.total_period,
266 he->stat.period, he->hists->stats.total_period);
267}
268
269static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
270 char *buf, size_t size)
271{
272 double old_period = he->stat.period;
273 double new_period = pair->stat.period;
274
275 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
276}
277
278static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
279 char *buf, size_t size)
280{
281 u64 old_period = he->stat.period;
282 u64 new_period = pair->stat.period;
283
284 return scnprintf(buf, size,
285 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
286 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
287}
288
289static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
290 char *buf, size_t size)
291{
292 switch (compute) {
293 case COMPUTE_DELTA:
294 return formula_delta(he, pair, buf, size);
295 case COMPUTE_RATIO:
296 return formula_ratio(he, pair, buf, size);
297 case COMPUTE_WEIGHTED_DIFF:
298 return formula_wdiff(he, pair, buf, size);
299 default:
300 BUG_ON(1);
301 }
302
303 return -1;
304}
305
306static int hists__add_entry(struct hists *hists,
307 struct addr_location *al, u64 period,
308 u64 weight, u64 transaction)
309{
310 if (__hists__add_entry(hists, al, NULL, NULL, NULL, period, weight,
311 transaction) != NULL)
312 return 0;
313 return -ENOMEM;
314}
315
316static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
317 union perf_event *event,
318 struct perf_sample *sample,
319 struct perf_evsel *evsel,
320 struct machine *machine)
321{
322 struct addr_location al;
323
324 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
325 pr_warning("problem processing %d event, skipping it.\n",
326 event->header.type);
327 return -1;
328 }
329
330 if (al.filtered)
331 return 0;
332
333 if (hists__add_entry(&evsel->hists, &al, sample->period,
334 sample->weight, sample->transaction)) {
335 pr_warning("problem incrementing symbol period, skipping event\n");
336 return -1;
337 }
338
339 evsel->hists.stats.total_period += sample->period;
340 return 0;
341}
342
343static struct perf_tool tool = {
344 .sample = diff__process_sample_event,
345 .mmap = perf_event__process_mmap,
346 .comm = perf_event__process_comm,
347 .exit = perf_event__process_exit,
348 .fork = perf_event__process_fork,
349 .lost = perf_event__process_lost,
350 .ordered_samples = true,
351 .ordering_requires_timestamps = true,
352};
353
354static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
355 struct perf_evlist *evlist)
356{
357 struct perf_evsel *e;
358
359 evlist__for_each(evlist, e) {
360 if (perf_evsel__match2(evsel, e))
361 return e;
362 }
363
364 return NULL;
365}
366
367static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
368{
369 struct perf_evsel *evsel;
370
371 evlist__for_each(evlist, evsel) {
372 struct hists *hists = &evsel->hists;
373
374 hists__collapse_resort(hists, NULL);
375 }
376}
377
378static struct hist_entry*
379get_pair_data(struct hist_entry *he, struct data__file *d)
380{
381 if (hist_entry__has_pairs(he)) {
382 struct hist_entry *pair;
383
384 list_for_each_entry(pair, &he->pairs.head, pairs.node)
385 if (pair->hists == d->hists)
386 return pair;
387 }
388
389 return NULL;
390}
391
392static struct hist_entry*
393get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
394{
395 void *ptr = dfmt - dfmt->idx;
396 struct data__file *d = container_of(ptr, struct data__file, fmt);
397
398 return get_pair_data(he, d);
399}
400
401static void hists__baseline_only(struct hists *hists)
402{
403 struct rb_root *root;
404 struct rb_node *next;
405
406 if (sort__need_collapse)
407 root = &hists->entries_collapsed;
408 else
409 root = hists->entries_in;
410
411 next = rb_first(root);
412 while (next != NULL) {
413 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
414
415 next = rb_next(&he->rb_node_in);
416 if (!hist_entry__next_pair(he)) {
417 rb_erase(&he->rb_node_in, root);
418 hist_entry__free(he);
419 }
420 }
421}
422
423static void hists__precompute(struct hists *hists)
424{
425 struct rb_root *root;
426 struct rb_node *next;
427
428 if (sort__need_collapse)
429 root = &hists->entries_collapsed;
430 else
431 root = hists->entries_in;
432
433 next = rb_first(root);
434 while (next != NULL) {
435 struct hist_entry *he, *pair;
436
437 he = rb_entry(next, struct hist_entry, rb_node_in);
438 next = rb_next(&he->rb_node_in);
439
440 pair = get_pair_data(he, &data__files[sort_compute]);
441 if (!pair)
442 continue;
443
444 switch (compute) {
445 case COMPUTE_DELTA:
446 compute_delta(he, pair);
447 break;
448 case COMPUTE_RATIO:
449 compute_ratio(he, pair);
450 break;
451 case COMPUTE_WEIGHTED_DIFF:
452 compute_wdiff(he, pair);
453 break;
454 default:
455 BUG_ON(1);
456 }
457 }
458}
459
460static int64_t cmp_doubles(double l, double r)
461{
462 if (l > r)
463 return -1;
464 else if (l < r)
465 return 1;
466 else
467 return 0;
468}
469
470static int64_t
471__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
472 int c)
473{
474 switch (c) {
475 case COMPUTE_DELTA:
476 {
477 double l = left->diff.period_ratio_delta;
478 double r = right->diff.period_ratio_delta;
479
480 return cmp_doubles(l, r);
481 }
482 case COMPUTE_RATIO:
483 {
484 double l = left->diff.period_ratio;
485 double r = right->diff.period_ratio;
486
487 return cmp_doubles(l, r);
488 }
489 case COMPUTE_WEIGHTED_DIFF:
490 {
491 s64 l = left->diff.wdiff;
492 s64 r = right->diff.wdiff;
493
494 return r - l;
495 }
496 default:
497 BUG_ON(1);
498 }
499
500 return 0;
501}
502
503static int64_t
504hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
505 int c)
506{
507 bool pairs_left = hist_entry__has_pairs(left);
508 bool pairs_right = hist_entry__has_pairs(right);
509 struct hist_entry *p_right, *p_left;
510
511 if (!pairs_left && !pairs_right)
512 return 0;
513
514 if (!pairs_left || !pairs_right)
515 return pairs_left ? -1 : 1;
516
517 p_left = get_pair_data(left, &data__files[sort_compute]);
518 p_right = get_pair_data(right, &data__files[sort_compute]);
519
520 if (!p_left && !p_right)
521 return 0;
522
523 if (!p_left || !p_right)
524 return p_left ? -1 : 1;
525
526 /*
527 * We have 2 entries of same kind, let's
528 * make the data comparison.
529 */
530 return __hist_entry__cmp_compute(p_left, p_right, c);
531}
532
533static void insert_hist_entry_by_compute(struct rb_root *root,
534 struct hist_entry *he,
535 int c)
536{
537 struct rb_node **p = &root->rb_node;
538 struct rb_node *parent = NULL;
539 struct hist_entry *iter;
540
541 while (*p != NULL) {
542 parent = *p;
543 iter = rb_entry(parent, struct hist_entry, rb_node);
544 if (hist_entry__cmp_compute(he, iter, c) < 0)
545 p = &(*p)->rb_left;
546 else
547 p = &(*p)->rb_right;
548 }
549
550 rb_link_node(&he->rb_node, parent, p);
551 rb_insert_color(&he->rb_node, root);
552}
553
554static void hists__compute_resort(struct hists *hists)
555{
556 struct rb_root *root;
557 struct rb_node *next;
558
559 if (sort__need_collapse)
560 root = &hists->entries_collapsed;
561 else
562 root = hists->entries_in;
563
564 hists->entries = RB_ROOT;
565 next = rb_first(root);
566
567 hists->nr_entries = 0;
568 hists->stats.total_period = 0;
569 hists__reset_col_len(hists);
570
571 while (next != NULL) {
572 struct hist_entry *he;
573
574 he = rb_entry(next, struct hist_entry, rb_node_in);
575 next = rb_next(&he->rb_node_in);
576
577 insert_hist_entry_by_compute(&hists->entries, he, compute);
578 hists__inc_nr_entries(hists, he);
579 }
580}
581
582static void hists__process(struct hists *hists)
583{
584 if (show_baseline_only)
585 hists__baseline_only(hists);
586
587 if (sort_compute) {
588 hists__precompute(hists);
589 hists__compute_resort(hists);
590 } else {
591 hists__output_resort(hists);
592 }
593
594 hists__fprintf(hists, true, 0, 0, 0, stdout);
595}
596
597static void data__fprintf(void)
598{
599 struct data__file *d;
600 int i;
601
602 fprintf(stdout, "# Data files:\n");
603
604 data__for_each_file(i, d)
605 fprintf(stdout, "# [%d] %s %s\n",
606 d->idx, d->file.path,
607 !d->idx ? "(Baseline)" : "");
608
609 fprintf(stdout, "#\n");
610}
611
612static void data_process(void)
613{
614 struct perf_evlist *evlist_base = data__files[0].session->evlist;
615 struct perf_evsel *evsel_base;
616 bool first = true;
617
618 evlist__for_each(evlist_base, evsel_base) {
619 struct data__file *d;
620 int i;
621
622 data__for_each_file_new(i, d) {
623 struct perf_evlist *evlist = d->session->evlist;
624 struct perf_evsel *evsel;
625
626 evsel = evsel_match(evsel_base, evlist);
627 if (!evsel)
628 continue;
629
630 d->hists = &evsel->hists;
631
632 hists__match(&evsel_base->hists, &evsel->hists);
633
634 if (!show_baseline_only)
635 hists__link(&evsel_base->hists,
636 &evsel->hists);
637 }
638
639 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
640 perf_evsel__name(evsel_base));
641
642 first = false;
643
644 if (verbose || data__files_cnt > 2)
645 data__fprintf();
646
647 hists__process(&evsel_base->hists);
648 }
649}
650
651static void data__free(struct data__file *d)
652{
653 int col;
654
655 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
656 struct diff_hpp_fmt *fmt = &d->fmt[col];
657
658 zfree(&fmt->header);
659 }
660}
661
662static int __cmd_diff(void)
663{
664 struct data__file *d;
665 int ret = -EINVAL, i;
666
667 data__for_each_file(i, d) {
668 d->session = perf_session__new(&d->file, false, &tool);
669 if (!d->session) {
670 pr_err("Failed to open %s\n", d->file.path);
671 ret = -ENOMEM;
672 goto out_delete;
673 }
674
675 ret = perf_session__process_events(d->session, &tool);
676 if (ret) {
677 pr_err("Failed to process %s\n", d->file.path);
678 goto out_delete;
679 }
680
681 perf_evlist__collapse_resort(d->session->evlist);
682 }
683
684 data_process();
685
686 out_delete:
687 data__for_each_file(i, d) {
688 if (d->session)
689 perf_session__delete(d->session);
690
691 data__free(d);
692 }
693
694 free(data__files);
695 return ret;
696}
697
698static const char * const diff_usage[] = {
699 "perf diff [<options>] [old_file] [new_file]",
700 NULL,
701};
702
703static const struct option options[] = {
704 OPT_INCR('v', "verbose", &verbose,
705 "be more verbose (show symbol address, etc)"),
706 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
707 "Show only items with match in baseline"),
708 OPT_CALLBACK('c', "compute", &compute,
709 "delta,ratio,wdiff:w1,w2 (default delta)",
710 "Entries differential computation selection",
711 setup_compute),
712 OPT_BOOLEAN('p', "period", &show_period,
713 "Show period values."),
714 OPT_BOOLEAN('F', "formula", &show_formula,
715 "Show formula."),
716 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
717 "dump raw trace in ASCII"),
718 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
719 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
720 "load module symbols - WARNING: use only with -k and LIVE kernel"),
721 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
722 "only consider symbols in these dsos"),
723 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
724 "only consider symbols in these comms"),
725 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
726 "only consider these symbols"),
727 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
728 "sort by key(s): pid, comm, dso, symbol, parent"),
729 OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
730 "separator for columns, no spaces will be added between "
731 "columns '.' is reserved."),
732 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
733 "Look for files with symbols relative to this directory"),
734 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
735 OPT_END()
736};
737
738static double baseline_percent(struct hist_entry *he)
739{
740 struct hists *hists = he->hists;
741 return 100.0 * he->stat.period / hists->stats.total_period;
742}
743
744static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
745 struct perf_hpp *hpp, struct hist_entry *he)
746{
747 struct diff_hpp_fmt *dfmt =
748 container_of(fmt, struct diff_hpp_fmt, fmt);
749 double percent = baseline_percent(he);
750 char pfmt[20] = " ";
751
752 if (!he->dummy) {
753 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
754 return percent_color_snprintf(hpp->buf, hpp->size,
755 pfmt, percent);
756 } else
757 return scnprintf(hpp->buf, hpp->size, "%*s",
758 dfmt->header_width, pfmt);
759}
760
761static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
762{
763 double percent = baseline_percent(he);
764 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
765 int ret = 0;
766
767 if (!he->dummy)
768 ret = scnprintf(buf, size, fmt, percent);
769
770 return ret;
771}
772
773static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
774 struct perf_hpp *hpp, struct hist_entry *he,
775 int comparison_method)
776{
777 struct diff_hpp_fmt *dfmt =
778 container_of(fmt, struct diff_hpp_fmt, fmt);
779 struct hist_entry *pair = get_pair_fmt(he, dfmt);
780 double diff;
781 s64 wdiff;
782 char pfmt[20] = " ";
783
784 if (!pair)
785 goto dummy_print;
786
787 switch (comparison_method) {
788 case COMPUTE_DELTA:
789 if (pair->diff.computed)
790 diff = pair->diff.period_ratio_delta;
791 else
792 diff = compute_delta(he, pair);
793
794 if (fabs(diff) < 0.01)
795 goto dummy_print;
796 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
797 return percent_color_snprintf(hpp->buf, hpp->size,
798 pfmt, diff);
799 case COMPUTE_RATIO:
800 if (he->dummy)
801 goto dummy_print;
802 if (pair->diff.computed)
803 diff = pair->diff.period_ratio;
804 else
805 diff = compute_ratio(he, pair);
806
807 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
808 return value_color_snprintf(hpp->buf, hpp->size,
809 pfmt, diff);
810 case COMPUTE_WEIGHTED_DIFF:
811 if (he->dummy)
812 goto dummy_print;
813 if (pair->diff.computed)
814 wdiff = pair->diff.wdiff;
815 else
816 wdiff = compute_wdiff(he, pair);
817
818 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
819 return color_snprintf(hpp->buf, hpp->size,
820 get_percent_color(wdiff),
821 pfmt, wdiff);
822 default:
823 BUG_ON(1);
824 }
825dummy_print:
826 return scnprintf(hpp->buf, hpp->size, "%*s",
827 dfmt->header_width, pfmt);
828}
829
830static int hpp__color_delta(struct perf_hpp_fmt *fmt,
831 struct perf_hpp *hpp, struct hist_entry *he)
832{
833 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
834}
835
836static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
837 struct perf_hpp *hpp, struct hist_entry *he)
838{
839 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
840}
841
842static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
843 struct perf_hpp *hpp, struct hist_entry *he)
844{
845 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
846}
847
848static void
849hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
850{
851 switch (idx) {
852 case PERF_HPP_DIFF__PERIOD_BASELINE:
853 scnprintf(buf, size, "%" PRIu64, he->stat.period);
854 break;
855
856 default:
857 break;
858 }
859}
860
861static void
862hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
863 int idx, char *buf, size_t size)
864{
865 double diff;
866 double ratio;
867 s64 wdiff;
868
869 switch (idx) {
870 case PERF_HPP_DIFF__DELTA:
871 if (pair->diff.computed)
872 diff = pair->diff.period_ratio_delta;
873 else
874 diff = compute_delta(he, pair);
875
876 if (fabs(diff) >= 0.01)
877 scnprintf(buf, size, "%+4.2F%%", diff);
878 break;
879
880 case PERF_HPP_DIFF__RATIO:
881 /* No point for ratio number if we are dummy.. */
882 if (he->dummy)
883 break;
884
885 if (pair->diff.computed)
886 ratio = pair->diff.period_ratio;
887 else
888 ratio = compute_ratio(he, pair);
889
890 if (ratio > 0.0)
891 scnprintf(buf, size, "%14.6F", ratio);
892 break;
893
894 case PERF_HPP_DIFF__WEIGHTED_DIFF:
895 /* No point for wdiff number if we are dummy.. */
896 if (he->dummy)
897 break;
898
899 if (pair->diff.computed)
900 wdiff = pair->diff.wdiff;
901 else
902 wdiff = compute_wdiff(he, pair);
903
904 if (wdiff != 0)
905 scnprintf(buf, size, "%14ld", wdiff);
906 break;
907
908 case PERF_HPP_DIFF__FORMULA:
909 formula_fprintf(he, pair, buf, size);
910 break;
911
912 case PERF_HPP_DIFF__PERIOD:
913 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
914 break;
915
916 default:
917 BUG_ON(1);
918 };
919}
920
921static void
922__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
923 char *buf, size_t size)
924{
925 struct hist_entry *pair = get_pair_fmt(he, dfmt);
926 int idx = dfmt->idx;
927
928 /* baseline is special */
929 if (idx == PERF_HPP_DIFF__BASELINE)
930 hpp__entry_baseline(he, buf, size);
931 else {
932 if (pair)
933 hpp__entry_pair(he, pair, idx, buf, size);
934 else
935 hpp__entry_unpair(he, idx, buf, size);
936 }
937}
938
939static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
940 struct hist_entry *he)
941{
942 struct diff_hpp_fmt *dfmt =
943 container_of(_fmt, struct diff_hpp_fmt, fmt);
944 char buf[MAX_COL_WIDTH] = " ";
945
946 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
947
948 if (symbol_conf.field_sep)
949 return scnprintf(hpp->buf, hpp->size, "%s", buf);
950 else
951 return scnprintf(hpp->buf, hpp->size, "%*s",
952 dfmt->header_width, buf);
953}
954
955static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
956 struct perf_evsel *evsel __maybe_unused)
957{
958 struct diff_hpp_fmt *dfmt =
959 container_of(fmt, struct diff_hpp_fmt, fmt);
960
961 BUG_ON(!dfmt->header);
962 return scnprintf(hpp->buf, hpp->size, dfmt->header);
963}
964
965static int hpp__width(struct perf_hpp_fmt *fmt,
966 struct perf_hpp *hpp __maybe_unused,
967 struct perf_evsel *evsel __maybe_unused)
968{
969 struct diff_hpp_fmt *dfmt =
970 container_of(fmt, struct diff_hpp_fmt, fmt);
971
972 BUG_ON(dfmt->header_width <= 0);
973 return dfmt->header_width;
974}
975
976static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
977{
978#define MAX_HEADER_NAME 100
979 char buf_indent[MAX_HEADER_NAME];
980 char buf[MAX_HEADER_NAME];
981 const char *header = NULL;
982 int width = 0;
983
984 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
985 header = columns[dfmt->idx].name;
986 width = columns[dfmt->idx].width;
987
988 /* Only our defined HPP fmts should appear here. */
989 BUG_ON(!header);
990
991 if (data__files_cnt > 2)
992 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
993
994#define NAME (data__files_cnt > 2 ? buf : header)
995 dfmt->header_width = width;
996 width = (int) strlen(NAME);
997 if (dfmt->header_width < width)
998 dfmt->header_width = width;
999
1000 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1001 dfmt->header_width, NAME);
1002
1003 dfmt->header = strdup(buf_indent);
1004#undef MAX_HEADER_NAME
1005#undef NAME
1006}
1007
1008static void data__hpp_register(struct data__file *d, int idx)
1009{
1010 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1011 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1012
1013 dfmt->idx = idx;
1014
1015 fmt->header = hpp__header;
1016 fmt->width = hpp__width;
1017 fmt->entry = hpp__entry_global;
1018
1019 /* TODO more colors */
1020 switch (idx) {
1021 case PERF_HPP_DIFF__BASELINE:
1022 fmt->color = hpp__color_baseline;
1023 break;
1024 case PERF_HPP_DIFF__DELTA:
1025 fmt->color = hpp__color_delta;
1026 break;
1027 case PERF_HPP_DIFF__RATIO:
1028 fmt->color = hpp__color_ratio;
1029 break;
1030 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1031 fmt->color = hpp__color_wdiff;
1032 break;
1033 default:
1034 break;
1035 }
1036
1037 init_header(d, dfmt);
1038 perf_hpp__column_register(fmt);
1039}
1040
1041static void ui_init(void)
1042{
1043 struct data__file *d;
1044 int i;
1045
1046 data__for_each_file(i, d) {
1047
1048 /*
1049 * Baseline or compute realted columns:
1050 *
1051 * PERF_HPP_DIFF__BASELINE
1052 * PERF_HPP_DIFF__DELTA
1053 * PERF_HPP_DIFF__RATIO
1054 * PERF_HPP_DIFF__WEIGHTED_DIFF
1055 */
1056 data__hpp_register(d, i ? compute_2_hpp[compute] :
1057 PERF_HPP_DIFF__BASELINE);
1058
1059 /*
1060 * And the rest:
1061 *
1062 * PERF_HPP_DIFF__FORMULA
1063 * PERF_HPP_DIFF__PERIOD
1064 * PERF_HPP_DIFF__PERIOD_BASELINE
1065 */
1066 if (show_formula && i)
1067 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1068
1069 if (show_period)
1070 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1071 PERF_HPP_DIFF__PERIOD_BASELINE);
1072 }
1073}
1074
1075static int data_init(int argc, const char **argv)
1076{
1077 struct data__file *d;
1078 static const char *defaults[] = {
1079 "perf.data.old",
1080 "perf.data",
1081 };
1082 bool use_default = true;
1083 int i;
1084
1085 data__files_cnt = 2;
1086
1087 if (argc) {
1088 if (argc == 1)
1089 defaults[1] = argv[0];
1090 else {
1091 data__files_cnt = argc;
1092 use_default = false;
1093 }
1094 } else if (perf_guest) {
1095 defaults[0] = "perf.data.host";
1096 defaults[1] = "perf.data.guest";
1097 }
1098
1099 if (sort_compute >= (unsigned int) data__files_cnt) {
1100 pr_err("Order option out of limit.\n");
1101 return -EINVAL;
1102 }
1103
1104 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1105 if (!data__files)
1106 return -ENOMEM;
1107
1108 data__for_each_file(i, d) {
1109 struct perf_data_file *file = &d->file;
1110
1111 file->path = use_default ? defaults[i] : argv[i];
1112 file->mode = PERF_DATA_MODE_READ,
1113 file->force = force,
1114
1115 d->idx = i;
1116 }
1117
1118 return 0;
1119}
1120
1121int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1122{
1123 sort_order = diff__default_sort_order;
1124 argc = parse_options(argc, argv, options, diff_usage, 0);
1125
1126 if (symbol__init() < 0)
1127 return -1;
1128
1129 if (data_init(argc, argv) < 0)
1130 return -1;
1131
1132 ui_init();
1133
1134 if (setup_sorting() < 0)
1135 usage_with_options(diff_usage, options);
1136
1137 setup_pager();
1138
1139 sort__setup_elide(NULL);
1140
1141 return __cmd_diff();
1142}
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#include "perf.h"
10
11#include "util/debug.h"
12#include "util/event.h"
13#include "util/hist.h"
14#include "util/evsel.h"
15#include "util/evlist.h"
16#include "util/session.h"
17#include "util/tool.h"
18#include "util/sort.h"
19#include "util/srcline.h"
20#include "util/symbol.h"
21#include "util/data.h"
22#include "util/config.h"
23#include "util/time-utils.h"
24#include "util/annotate.h"
25#include "util/map.h"
26#include "util/spark.h"
27#include "util/block-info.h"
28#include "util/stream.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 if (machine__resolve(machine, &al, sample) < 0) {
413 pr_warning("problem processing %d event, skipping it.\n",
414 event->header.type);
415 return -1;
416 }
417
418 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) {
419 ret = 0;
420 goto out_put;
421 }
422
423 switch (compute) {
424 case COMPUTE_CYCLES:
425 if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
426 NULL, NULL, sample, true)) {
427 pr_warning("problem incrementing symbol period, "
428 "skipping event\n");
429 goto out_put;
430 }
431
432 hist__account_cycles(sample->branch_stack, &al, sample, false,
433 NULL);
434 break;
435
436 case COMPUTE_STREAM:
437 if (hist_entry_iter__add(&iter, &al, PERF_MAX_STACK_DEPTH,
438 NULL)) {
439 pr_debug("problem adding hist entry, skipping event\n");
440 goto out_put;
441 }
442 break;
443
444 default:
445 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample,
446 true)) {
447 pr_warning("problem incrementing symbol period, "
448 "skipping event\n");
449 goto out_put;
450 }
451 }
452
453 /*
454 * The total_period is updated here before going to the output
455 * tree since normally only the baseline hists will call
456 * hists__output_resort() and precompute needs the total
457 * period in order to sort entries by percentage delta.
458 */
459 hists->stats.total_period += sample->period;
460 if (!al.filtered)
461 hists->stats.total_non_filtered_period += sample->period;
462 ret = 0;
463out_put:
464 addr_location__put(&al);
465 return ret;
466}
467
468static struct perf_diff pdiff = {
469 .tool = {
470 .sample = diff__process_sample_event,
471 .mmap = perf_event__process_mmap,
472 .mmap2 = perf_event__process_mmap2,
473 .comm = perf_event__process_comm,
474 .exit = perf_event__process_exit,
475 .fork = perf_event__process_fork,
476 .lost = perf_event__process_lost,
477 .namespaces = perf_event__process_namespaces,
478 .cgroup = perf_event__process_cgroup,
479 .ordered_events = true,
480 .ordering_requires_timestamps = true,
481 },
482};
483
484static struct evsel *evsel_match(struct evsel *evsel,
485 struct evlist *evlist)
486{
487 struct evsel *e;
488
489 evlist__for_each_entry(evlist, e) {
490 if (evsel__match2(evsel, e))
491 return e;
492 }
493
494 return NULL;
495}
496
497static void evlist__collapse_resort(struct evlist *evlist)
498{
499 struct evsel *evsel;
500
501 evlist__for_each_entry(evlist, evsel) {
502 struct hists *hists = evsel__hists(evsel);
503
504 hists__collapse_resort(hists, NULL);
505 }
506}
507
508static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
509{
510 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
511 void *ptr = dfmt - dfmt->idx;
512 struct data__file *d = container_of(ptr, struct data__file, fmt);
513
514 return d;
515}
516
517static struct hist_entry*
518get_pair_data(struct hist_entry *he, struct data__file *d)
519{
520 if (hist_entry__has_pairs(he)) {
521 struct hist_entry *pair;
522
523 list_for_each_entry(pair, &he->pairs.head, pairs.node)
524 if (pair->hists == d->hists)
525 return pair;
526 }
527
528 return NULL;
529}
530
531static struct hist_entry*
532get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
533{
534 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
535
536 return get_pair_data(he, d);
537}
538
539static void hists__baseline_only(struct hists *hists)
540{
541 struct rb_root_cached *root;
542 struct rb_node *next;
543
544 if (hists__has(hists, need_collapse))
545 root = &hists->entries_collapsed;
546 else
547 root = hists->entries_in;
548
549 next = rb_first_cached(root);
550 while (next != NULL) {
551 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
552
553 next = rb_next(&he->rb_node_in);
554 if (!hist_entry__next_pair(he)) {
555 rb_erase_cached(&he->rb_node_in, root);
556 hist_entry__delete(he);
557 }
558 }
559}
560
561static int64_t block_cycles_diff_cmp(struct hist_entry *left,
562 struct hist_entry *right)
563{
564 bool pairs_left = hist_entry__has_pairs(left);
565 bool pairs_right = hist_entry__has_pairs(right);
566 s64 l, r;
567
568 if (!pairs_left && !pairs_right)
569 return 0;
570
571 l = llabs(left->diff.cycles);
572 r = llabs(right->diff.cycles);
573 return r - l;
574}
575
576static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused,
577 struct hist_entry *left, struct hist_entry *right)
578{
579 return block_cycles_diff_cmp(right, left);
580}
581
582static void init_block_hist(struct block_hist *bh)
583{
584 __hists__init(&bh->block_hists, &bh->block_list);
585 perf_hpp_list__init(&bh->block_list);
586
587 INIT_LIST_HEAD(&bh->block_fmt.list);
588 INIT_LIST_HEAD(&bh->block_fmt.sort_list);
589 bh->block_fmt.cmp = block_info__cmp;
590 bh->block_fmt.sort = block_sort;
591 perf_hpp_list__register_sort_field(&bh->block_list,
592 &bh->block_fmt);
593 bh->valid = true;
594}
595
596static struct hist_entry *get_block_pair(struct hist_entry *he,
597 struct hists *hists_pair)
598{
599 struct rb_root_cached *root = hists_pair->entries_in;
600 struct rb_node *next = rb_first_cached(root);
601 int64_t cmp;
602
603 while (next != NULL) {
604 struct hist_entry *he_pair = rb_entry(next, struct hist_entry,
605 rb_node_in);
606
607 next = rb_next(&he_pair->rb_node_in);
608
609 cmp = __block_info__cmp(he_pair, he);
610 if (!cmp)
611 return he_pair;
612 }
613
614 return NULL;
615}
616
617static void init_spark_values(unsigned long *svals, int num)
618{
619 for (int i = 0; i < num; i++)
620 svals[i] = 0;
621}
622
623static void update_spark_value(unsigned long *svals, int num,
624 struct stats *stats, u64 val)
625{
626 int n = stats->n;
627
628 if (n < num)
629 svals[n] = val;
630}
631
632static void compute_cycles_diff(struct hist_entry *he,
633 struct hist_entry *pair)
634{
635 pair->diff.computed = true;
636 if (pair->block_info->num && he->block_info->num) {
637 pair->diff.cycles =
638 pair->block_info->cycles_aggr / pair->block_info->num_aggr -
639 he->block_info->cycles_aggr / he->block_info->num_aggr;
640
641 if (!cycles_hist)
642 return;
643
644 init_stats(&pair->diff.stats);
645 init_spark_values(pair->diff.svals, NUM_SPARKS);
646
647 for (int i = 0; i < pair->block_info->num; i++) {
648 u64 val;
649
650 if (i >= he->block_info->num || i >= NUM_SPARKS)
651 break;
652
653 val = llabs(pair->block_info->cycles_spark[i] -
654 he->block_info->cycles_spark[i]);
655
656 update_spark_value(pair->diff.svals, NUM_SPARKS,
657 &pair->diff.stats, val);
658 update_stats(&pair->diff.stats, val);
659 }
660 }
661}
662
663static void block_hists_match(struct hists *hists_base,
664 struct hists *hists_pair)
665{
666 struct rb_root_cached *root = hists_base->entries_in;
667 struct rb_node *next = rb_first_cached(root);
668
669 while (next != NULL) {
670 struct hist_entry *he = rb_entry(next, struct hist_entry,
671 rb_node_in);
672 struct hist_entry *pair = get_block_pair(he, hists_pair);
673
674 next = rb_next(&he->rb_node_in);
675
676 if (pair) {
677 hist_entry__add_pair(pair, he);
678 compute_cycles_diff(he, pair);
679 }
680 }
681}
682
683static void hists__precompute(struct hists *hists)
684{
685 struct rb_root_cached *root;
686 struct rb_node *next;
687
688 if (hists__has(hists, need_collapse))
689 root = &hists->entries_collapsed;
690 else
691 root = hists->entries_in;
692
693 next = rb_first_cached(root);
694 while (next != NULL) {
695 struct block_hist *bh, *pair_bh;
696 struct hist_entry *he, *pair;
697 struct data__file *d;
698 int i;
699
700 he = rb_entry(next, struct hist_entry, rb_node_in);
701 next = rb_next(&he->rb_node_in);
702
703 if (compute == COMPUTE_CYCLES) {
704 bh = container_of(he, struct block_hist, he);
705 init_block_hist(bh);
706 block_info__process_sym(he, bh, NULL, 0);
707 }
708
709 data__for_each_file_new(i, d) {
710 pair = get_pair_data(he, d);
711 if (!pair)
712 continue;
713
714 switch (compute) {
715 case COMPUTE_DELTA:
716 case COMPUTE_DELTA_ABS:
717 compute_delta(he, pair);
718 break;
719 case COMPUTE_RATIO:
720 compute_ratio(he, pair);
721 break;
722 case COMPUTE_WEIGHTED_DIFF:
723 compute_wdiff(he, pair);
724 break;
725 case COMPUTE_CYCLES:
726 pair_bh = container_of(pair, struct block_hist,
727 he);
728 init_block_hist(pair_bh);
729 block_info__process_sym(pair, pair_bh, NULL, 0);
730
731 bh = container_of(he, struct block_hist, he);
732
733 if (bh->valid && pair_bh->valid) {
734 block_hists_match(&bh->block_hists,
735 &pair_bh->block_hists);
736 hists__output_resort(&pair_bh->block_hists,
737 NULL);
738 }
739 break;
740 default:
741 BUG_ON(1);
742 }
743 }
744 }
745}
746
747static int64_t cmp_doubles(double l, double r)
748{
749 if (l > r)
750 return -1;
751 else if (l < r)
752 return 1;
753 else
754 return 0;
755}
756
757static int64_t
758__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
759 int c)
760{
761 switch (c) {
762 case COMPUTE_DELTA:
763 {
764 double l = left->diff.period_ratio_delta;
765 double r = right->diff.period_ratio_delta;
766
767 return cmp_doubles(l, r);
768 }
769 case COMPUTE_DELTA_ABS:
770 {
771 double l = fabs(left->diff.period_ratio_delta);
772 double r = fabs(right->diff.period_ratio_delta);
773
774 return cmp_doubles(l, r);
775 }
776 case COMPUTE_RATIO:
777 {
778 double l = left->diff.period_ratio;
779 double r = right->diff.period_ratio;
780
781 return cmp_doubles(l, r);
782 }
783 case COMPUTE_WEIGHTED_DIFF:
784 {
785 s64 l = left->diff.wdiff;
786 s64 r = right->diff.wdiff;
787
788 return r - l;
789 }
790 default:
791 BUG_ON(1);
792 }
793
794 return 0;
795}
796
797static int64_t
798hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
799 int c, int sort_idx)
800{
801 bool pairs_left = hist_entry__has_pairs(left);
802 bool pairs_right = hist_entry__has_pairs(right);
803 struct hist_entry *p_right, *p_left;
804
805 if (!pairs_left && !pairs_right)
806 return 0;
807
808 if (!pairs_left || !pairs_right)
809 return pairs_left ? -1 : 1;
810
811 p_left = get_pair_data(left, &data__files[sort_idx]);
812 p_right = get_pair_data(right, &data__files[sort_idx]);
813
814 if (!p_left && !p_right)
815 return 0;
816
817 if (!p_left || !p_right)
818 return p_left ? -1 : 1;
819
820 /*
821 * We have 2 entries of same kind, let's
822 * make the data comparison.
823 */
824 return __hist_entry__cmp_compute(p_left, p_right, c);
825}
826
827static int64_t
828hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
829 int c, int sort_idx)
830{
831 struct hist_entry *p_right, *p_left;
832
833 p_left = get_pair_data(left, &data__files[sort_idx]);
834 p_right = get_pair_data(right, &data__files[sort_idx]);
835
836 if (!p_left && !p_right)
837 return 0;
838
839 if (!p_left || !p_right)
840 return p_left ? -1 : 1;
841
842 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
843 /*
844 * The delta can be computed without the baseline, but
845 * others are not. Put those entries which have no
846 * values below.
847 */
848 if (left->dummy && right->dummy)
849 return 0;
850
851 if (left->dummy || right->dummy)
852 return left->dummy ? 1 : -1;
853 }
854
855 return __hist_entry__cmp_compute(p_left, p_right, c);
856}
857
858static int64_t
859hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
860 struct hist_entry *left __maybe_unused,
861 struct hist_entry *right __maybe_unused)
862{
863 return 0;
864}
865
866static int64_t
867hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
868 struct hist_entry *left, struct hist_entry *right)
869{
870 if (left->stat.period == right->stat.period)
871 return 0;
872 return left->stat.period > right->stat.period ? 1 : -1;
873}
874
875static int64_t
876hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
877 struct hist_entry *left, struct hist_entry *right)
878{
879 struct data__file *d = fmt_to_data_file(fmt);
880
881 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
882}
883
884static int64_t
885hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
886 struct hist_entry *left, struct hist_entry *right)
887{
888 struct data__file *d = fmt_to_data_file(fmt);
889
890 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
891}
892
893static int64_t
894hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
895 struct hist_entry *left, struct hist_entry *right)
896{
897 struct data__file *d = fmt_to_data_file(fmt);
898
899 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
900}
901
902static int64_t
903hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
904 struct hist_entry *left, struct hist_entry *right)
905{
906 struct data__file *d = fmt_to_data_file(fmt);
907
908 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
909}
910
911static int64_t
912hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
913 struct hist_entry *left, struct hist_entry *right)
914{
915 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
916 sort_compute);
917}
918
919static int64_t
920hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
921 struct hist_entry *left, struct hist_entry *right)
922{
923 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
924 sort_compute);
925}
926
927static int64_t
928hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
929 struct hist_entry *left, struct hist_entry *right)
930{
931 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
932 sort_compute);
933}
934
935static int64_t
936hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
937 struct hist_entry *left, struct hist_entry *right)
938{
939 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
940 sort_compute);
941}
942
943static void hists__process(struct hists *hists)
944{
945 if (show_baseline_only)
946 hists__baseline_only(hists);
947
948 hists__precompute(hists);
949 hists__output_resort(hists, NULL);
950
951 if (compute == COMPUTE_CYCLES)
952 symbol_conf.report_block = true;
953
954 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
955 !symbol_conf.use_callchain);
956}
957
958static void data__fprintf(void)
959{
960 struct data__file *d;
961 int i;
962
963 fprintf(stdout, "# Data files:\n");
964
965 data__for_each_file(i, d)
966 fprintf(stdout, "# [%d] %s %s\n",
967 d->idx, d->data.path,
968 !d->idx ? "(Baseline)" : "");
969
970 fprintf(stdout, "#\n");
971}
972
973static void data_process(void)
974{
975 struct evlist *evlist_base = data__files[0].session->evlist;
976 struct evsel *evsel_base;
977 bool first = true;
978
979 evlist__for_each_entry(evlist_base, evsel_base) {
980 struct hists *hists_base = evsel__hists(evsel_base);
981 struct data__file *d;
982 int i;
983
984 data__for_each_file_new(i, d) {
985 struct evlist *evlist = d->session->evlist;
986 struct evsel *evsel;
987 struct hists *hists;
988
989 evsel = evsel_match(evsel_base, evlist);
990 if (!evsel)
991 continue;
992
993 hists = evsel__hists(evsel);
994 d->hists = hists;
995
996 hists__match(hists_base, hists);
997
998 if (!show_baseline_only)
999 hists__link(hists_base, hists);
1000 }
1001
1002 if (!quiet) {
1003 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
1004 evsel__name(evsel_base));
1005 }
1006
1007 first = false;
1008
1009 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
1010 data__fprintf();
1011
1012 /* Don't sort callchain for perf diff */
1013 evsel__reset_sample_bit(evsel_base, CALLCHAIN);
1014
1015 hists__process(hists_base);
1016 }
1017}
1018
1019static int process_base_stream(struct data__file *data_base,
1020 struct data__file *data_pair,
1021 const char *title __maybe_unused)
1022{
1023 struct evlist *evlist_base = data_base->session->evlist;
1024 struct evlist *evlist_pair = data_pair->session->evlist;
1025 struct evsel *evsel_base, *evsel_pair;
1026 struct evsel_streams *es_base, *es_pair;
1027
1028 evlist__for_each_entry(evlist_base, evsel_base) {
1029 evsel_pair = evsel_match(evsel_base, evlist_pair);
1030 if (!evsel_pair)
1031 continue;
1032
1033 es_base = evsel_streams__entry(data_base->evlist_streams,
1034 evsel_base->core.idx);
1035 if (!es_base)
1036 return -1;
1037
1038 es_pair = evsel_streams__entry(data_pair->evlist_streams,
1039 evsel_pair->core.idx);
1040 if (!es_pair)
1041 return -1;
1042
1043 evsel_streams__match(es_base, es_pair);
1044 evsel_streams__report(es_base, es_pair);
1045 }
1046
1047 return 0;
1048}
1049
1050static void stream_process(void)
1051{
1052 /*
1053 * Stream comparison only supports two data files.
1054 * perf.data.old and perf.data. data__files[0] is perf.data.old,
1055 * data__files[1] is perf.data.
1056 */
1057 process_base_stream(&data__files[0], &data__files[1],
1058 "# Output based on old perf data:\n#\n");
1059}
1060
1061static void data__free(struct data__file *d)
1062{
1063 int col;
1064
1065 if (d->evlist_streams)
1066 evlist_streams__delete(d->evlist_streams);
1067
1068 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
1069 struct diff_hpp_fmt *fmt = &d->fmt[col];
1070
1071 zfree(&fmt->header);
1072 }
1073}
1074
1075static int abstime_str_dup(char **pstr)
1076{
1077 char *str = NULL;
1078
1079 if (pdiff.time_str && strchr(pdiff.time_str, ':')) {
1080 str = strdup(pdiff.time_str);
1081 if (!str)
1082 return -ENOMEM;
1083 }
1084
1085 *pstr = str;
1086 return 0;
1087}
1088
1089static int parse_absolute_time(struct data__file *d, char **pstr)
1090{
1091 char *p = *pstr;
1092 int ret;
1093
1094 /*
1095 * Absolute timestamp for one file has the format: a.b,c.d
1096 * For multiple files, the format is: a.b,c.d:a.b,c.d
1097 */
1098 p = strchr(*pstr, ':');
1099 if (p) {
1100 if (p == *pstr) {
1101 pr_err("Invalid time string\n");
1102 return -EINVAL;
1103 }
1104
1105 *p = 0;
1106 p++;
1107 if (*p == 0) {
1108 pr_err("Invalid time string\n");
1109 return -EINVAL;
1110 }
1111 }
1112
1113 ret = perf_time__parse_for_ranges(*pstr, d->session,
1114 &pdiff.ptime_range,
1115 &pdiff.range_size,
1116 &pdiff.range_num);
1117 if (ret < 0)
1118 return ret;
1119
1120 if (!p || *p == 0)
1121 *pstr = NULL;
1122 else
1123 *pstr = p;
1124
1125 return ret;
1126}
1127
1128static int parse_percent_time(struct data__file *d)
1129{
1130 int ret;
1131
1132 ret = perf_time__parse_for_ranges(pdiff.time_str, d->session,
1133 &pdiff.ptime_range,
1134 &pdiff.range_size,
1135 &pdiff.range_num);
1136 return ret;
1137}
1138
1139static int parse_time_str(struct data__file *d, char *abstime_ostr,
1140 char **pabstime_tmp)
1141{
1142 int ret = 0;
1143
1144 if (abstime_ostr)
1145 ret = parse_absolute_time(d, pabstime_tmp);
1146 else if (pdiff.time_str)
1147 ret = parse_percent_time(d);
1148
1149 return ret;
1150}
1151
1152static int check_file_brstack(void)
1153{
1154 struct data__file *d;
1155 bool has_br_stack;
1156 int i;
1157
1158 data__for_each_file(i, d) {
1159 d->session = perf_session__new(&d->data, &pdiff.tool);
1160 if (IS_ERR(d->session)) {
1161 pr_err("Failed to open %s\n", d->data.path);
1162 return PTR_ERR(d->session);
1163 }
1164
1165 has_br_stack = perf_header__has_feat(&d->session->header,
1166 HEADER_BRANCH_STACK);
1167 perf_session__delete(d->session);
1168 if (!has_br_stack)
1169 return 0;
1170 }
1171
1172 /* Set only all files having branch stacks */
1173 pdiff.has_br_stack = true;
1174 return 0;
1175}
1176
1177static int __cmd_diff(void)
1178{
1179 struct data__file *d;
1180 int ret, i;
1181 char *abstime_ostr, *abstime_tmp;
1182
1183 ret = abstime_str_dup(&abstime_ostr);
1184 if (ret)
1185 return ret;
1186
1187 abstime_tmp = abstime_ostr;
1188 ret = -EINVAL;
1189
1190 data__for_each_file(i, d) {
1191 d->session = perf_session__new(&d->data, &pdiff.tool);
1192 if (IS_ERR(d->session)) {
1193 ret = PTR_ERR(d->session);
1194 pr_err("Failed to open %s\n", d->data.path);
1195 goto out_delete;
1196 }
1197
1198 if (pdiff.time_str) {
1199 ret = parse_time_str(d, abstime_ostr, &abstime_tmp);
1200 if (ret < 0)
1201 goto out_delete;
1202 }
1203
1204 if (cpu_list) {
1205 ret = perf_session__cpu_bitmap(d->session, cpu_list,
1206 cpu_bitmap);
1207 if (ret < 0)
1208 goto out_delete;
1209 }
1210
1211 ret = perf_session__process_events(d->session);
1212 if (ret) {
1213 pr_err("Failed to process %s\n", d->data.path);
1214 goto out_delete;
1215 }
1216
1217 evlist__collapse_resort(d->session->evlist);
1218
1219 if (pdiff.ptime_range)
1220 zfree(&pdiff.ptime_range);
1221
1222 if (compute == COMPUTE_STREAM) {
1223 d->evlist_streams = evlist__create_streams(
1224 d->session->evlist, 5);
1225 if (!d->evlist_streams) {
1226 ret = -ENOMEM;
1227 goto out_delete;
1228 }
1229 }
1230 }
1231
1232 if (compute == COMPUTE_STREAM)
1233 stream_process();
1234 else
1235 data_process();
1236
1237 out_delete:
1238 data__for_each_file(i, d) {
1239 if (!IS_ERR(d->session))
1240 perf_session__delete(d->session);
1241 data__free(d);
1242 }
1243
1244 free(data__files);
1245
1246 if (pdiff.ptime_range)
1247 zfree(&pdiff.ptime_range);
1248
1249 if (abstime_ostr)
1250 free(abstime_ostr);
1251
1252 return ret;
1253}
1254
1255static const char * const diff_usage[] = {
1256 "perf diff [<options>] [old_file] [new_file]",
1257 NULL,
1258};
1259
1260static const struct option options[] = {
1261 OPT_INCR('v', "verbose", &verbose,
1262 "be more verbose (show symbol address, etc)"),
1263 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any warnings or messages"),
1264 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
1265 "Show only items with match in baseline"),
1266 OPT_CALLBACK('c', "compute", &compute,
1267 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs),cycles",
1268 "Entries differential computation selection",
1269 setup_compute),
1270 OPT_BOOLEAN('p', "period", &show_period,
1271 "Show period values."),
1272 OPT_BOOLEAN('F', "formula", &show_formula,
1273 "Show formula."),
1274 OPT_BOOLEAN(0, "cycles-hist", &cycles_hist,
1275 "Show cycles histogram and standard deviation "
1276 "- WARNING: use only with -c cycles."),
1277 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1278 "dump raw trace in ASCII"),
1279 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
1280 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1281 "file", "kallsyms pathname"),
1282 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
1283 "load module symbols - WARNING: use only with -k and LIVE kernel"),
1284 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1285 "only consider symbols in these dsos"),
1286 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1287 "only consider symbols in these comms"),
1288 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1289 "only consider these symbols"),
1290 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1291 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1292 " Please refer the man page for the complete list."),
1293 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
1294 "separator for columns, no spaces will be added between "
1295 "columns '.' is reserved."),
1296 OPT_CALLBACK(0, "symfs", NULL, "directory",
1297 "Look for files with symbols relative to this directory",
1298 symbol__config_symfs),
1299 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
1300 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1301 "How to display percentage of filtered entries", parse_filter_percentage),
1302 OPT_STRING(0, "time", &pdiff.time_str, "str",
1303 "Time span (time percent or absolute timestamp)"),
1304 OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1305 OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
1306 "only consider symbols in these pids"),
1307 OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
1308 "only consider symbols in these tids"),
1309 OPT_BOOLEAN(0, "stream", &pdiff.stream,
1310 "Enable hot streams comparison."),
1311 OPT_END()
1312};
1313
1314static double baseline_percent(struct hist_entry *he)
1315{
1316 u64 total = hists__total_period(he->hists);
1317
1318 return 100.0 * he->stat.period / total;
1319}
1320
1321static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
1322 struct perf_hpp *hpp, struct hist_entry *he)
1323{
1324 struct diff_hpp_fmt *dfmt =
1325 container_of(fmt, struct diff_hpp_fmt, fmt);
1326 double percent = baseline_percent(he);
1327 char pfmt[20] = " ";
1328
1329 if (!he->dummy) {
1330 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
1331 return percent_color_snprintf(hpp->buf, hpp->size,
1332 pfmt, percent);
1333 } else
1334 return scnprintf(hpp->buf, hpp->size, "%*s",
1335 dfmt->header_width, pfmt);
1336}
1337
1338static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
1339{
1340 double percent = baseline_percent(he);
1341 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
1342 int ret = 0;
1343
1344 if (!he->dummy)
1345 ret = scnprintf(buf, size, fmt, percent);
1346
1347 return ret;
1348}
1349
1350static int cycles_printf(struct hist_entry *he, struct hist_entry *pair,
1351 struct perf_hpp *hpp, int width)
1352{
1353 struct block_hist *bh = container_of(he, struct block_hist, he);
1354 struct block_hist *bh_pair = container_of(pair, struct block_hist, he);
1355 struct hist_entry *block_he;
1356 struct block_info *bi;
1357 char buf[128];
1358 char *start_line, *end_line;
1359
1360 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1361 if (!block_he) {
1362 hpp->skip = true;
1363 return 0;
1364 }
1365
1366 /*
1367 * Avoid printing the warning "addr2line_init failed for ..."
1368 */
1369 symbol_conf.disable_add2line_warn = true;
1370
1371 bi = block_he->block_info;
1372
1373 start_line = map__srcline(he->ms.map, bi->sym->start + bi->start,
1374 he->ms.sym);
1375
1376 end_line = map__srcline(he->ms.map, bi->sym->start + bi->end,
1377 he->ms.sym);
1378
1379 if ((strncmp(start_line, SRCLINE_UNKNOWN, strlen(SRCLINE_UNKNOWN)) != 0) &&
1380 (strncmp(end_line, SRCLINE_UNKNOWN, strlen(SRCLINE_UNKNOWN)) != 0)) {
1381 scnprintf(buf, sizeof(buf), "[%s -> %s] %4ld",
1382 start_line, end_line, block_he->diff.cycles);
1383 } else {
1384 scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld",
1385 bi->start, bi->end, block_he->diff.cycles);
1386 }
1387
1388 free_srcline(start_line);
1389 free_srcline(end_line);
1390
1391 return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
1392}
1393
1394static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
1395 struct perf_hpp *hpp, struct hist_entry *he,
1396 int comparison_method)
1397{
1398 struct diff_hpp_fmt *dfmt =
1399 container_of(fmt, struct diff_hpp_fmt, fmt);
1400 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1401 double diff;
1402 s64 wdiff;
1403 char pfmt[20] = " ";
1404
1405 if (!pair) {
1406 if (comparison_method == COMPUTE_CYCLES) {
1407 struct block_hist *bh;
1408
1409 bh = container_of(he, struct block_hist, he);
1410 if (bh->block_idx)
1411 hpp->skip = true;
1412 }
1413
1414 goto no_print;
1415 }
1416
1417 switch (comparison_method) {
1418 case COMPUTE_DELTA:
1419 if (pair->diff.computed)
1420 diff = pair->diff.period_ratio_delta;
1421 else
1422 diff = compute_delta(he, pair);
1423
1424 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
1425 return percent_color_snprintf(hpp->buf, hpp->size,
1426 pfmt, diff);
1427 case COMPUTE_RATIO:
1428 if (he->dummy)
1429 goto dummy_print;
1430 if (pair->diff.computed)
1431 diff = pair->diff.period_ratio;
1432 else
1433 diff = compute_ratio(he, pair);
1434
1435 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
1436 return value_color_snprintf(hpp->buf, hpp->size,
1437 pfmt, diff);
1438 case COMPUTE_WEIGHTED_DIFF:
1439 if (he->dummy)
1440 goto dummy_print;
1441 if (pair->diff.computed)
1442 wdiff = pair->diff.wdiff;
1443 else
1444 wdiff = compute_wdiff(he, pair);
1445
1446 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
1447 return color_snprintf(hpp->buf, hpp->size,
1448 get_percent_color(wdiff),
1449 pfmt, wdiff);
1450 case COMPUTE_CYCLES:
1451 return cycles_printf(he, pair, hpp, dfmt->header_width);
1452 default:
1453 BUG_ON(1);
1454 }
1455dummy_print:
1456 return scnprintf(hpp->buf, hpp->size, "%*s",
1457 dfmt->header_width, "N/A");
1458no_print:
1459 return scnprintf(hpp->buf, hpp->size, "%*s",
1460 dfmt->header_width, pfmt);
1461}
1462
1463static int hpp__color_delta(struct perf_hpp_fmt *fmt,
1464 struct perf_hpp *hpp, struct hist_entry *he)
1465{
1466 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
1467}
1468
1469static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
1470 struct perf_hpp *hpp, struct hist_entry *he)
1471{
1472 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
1473}
1474
1475static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
1476 struct perf_hpp *hpp, struct hist_entry *he)
1477{
1478 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
1479}
1480
1481static int hpp__color_cycles(struct perf_hpp_fmt *fmt,
1482 struct perf_hpp *hpp, struct hist_entry *he)
1483{
1484 return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);
1485}
1486
1487static int all_zero(unsigned long *vals, int len)
1488{
1489 int i;
1490
1491 for (i = 0; i < len; i++)
1492 if (vals[i] != 0)
1493 return 0;
1494 return 1;
1495}
1496
1497static int print_cycles_spark(char *bf, int size, unsigned long *svals, u64 n)
1498{
1499 int printed;
1500
1501 if (n <= 1)
1502 return 0;
1503
1504 if (n > NUM_SPARKS)
1505 n = NUM_SPARKS;
1506 if (all_zero(svals, n))
1507 return 0;
1508
1509 printed = print_spark(bf, size, svals, n);
1510 printed += scnprintf(bf + printed, size - printed, " ");
1511 return printed;
1512}
1513
1514static int hpp__color_cycles_hist(struct perf_hpp_fmt *fmt,
1515 struct perf_hpp *hpp, struct hist_entry *he)
1516{
1517 struct diff_hpp_fmt *dfmt =
1518 container_of(fmt, struct diff_hpp_fmt, fmt);
1519 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1520 struct block_hist *bh = container_of(he, struct block_hist, he);
1521 struct block_hist *bh_pair;
1522 struct hist_entry *block_he;
1523 char spark[32], buf[128];
1524 double r;
1525 int ret, pad;
1526
1527 if (!pair) {
1528 if (bh->block_idx)
1529 hpp->skip = true;
1530
1531 goto no_print;
1532 }
1533
1534 bh_pair = container_of(pair, struct block_hist, he);
1535
1536 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1537 if (!block_he) {
1538 hpp->skip = true;
1539 goto no_print;
1540 }
1541
1542 ret = print_cycles_spark(spark, sizeof(spark), block_he->diff.svals,
1543 block_he->diff.stats.n);
1544
1545 r = rel_stddev_stats(stddev_stats(&block_he->diff.stats),
1546 avg_stats(&block_he->diff.stats));
1547
1548 if (ret) {
1549 /*
1550 * Padding spaces if number of sparks less than NUM_SPARKS
1551 * otherwise the output is not aligned.
1552 */
1553 pad = NUM_SPARKS - ((ret - 1) / 3);
1554 scnprintf(buf, sizeof(buf), "%s%5.1f%% %s", "\u00B1", r, spark);
1555 ret = scnprintf(hpp->buf, hpp->size, "%*s",
1556 dfmt->header_width, buf);
1557
1558 if (pad) {
1559 ret += scnprintf(hpp->buf + ret, hpp->size - ret,
1560 "%-*s", pad, " ");
1561 }
1562
1563 return ret;
1564 }
1565
1566no_print:
1567 return scnprintf(hpp->buf, hpp->size, "%*s",
1568 dfmt->header_width, " ");
1569}
1570
1571static void
1572hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
1573{
1574 switch (idx) {
1575 case PERF_HPP_DIFF__PERIOD_BASELINE:
1576 scnprintf(buf, size, "%" PRIu64, he->stat.period);
1577 break;
1578
1579 default:
1580 break;
1581 }
1582}
1583
1584static void
1585hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
1586 int idx, char *buf, size_t size)
1587{
1588 double diff;
1589 double ratio;
1590 s64 wdiff;
1591
1592 switch (idx) {
1593 case PERF_HPP_DIFF__DELTA:
1594 case PERF_HPP_DIFF__DELTA_ABS:
1595 if (pair->diff.computed)
1596 diff = pair->diff.period_ratio_delta;
1597 else
1598 diff = compute_delta(he, pair);
1599
1600 scnprintf(buf, size, "%+4.2F%%", diff);
1601 break;
1602
1603 case PERF_HPP_DIFF__RATIO:
1604 /* No point for ratio number if we are dummy.. */
1605 if (he->dummy) {
1606 scnprintf(buf, size, "N/A");
1607 break;
1608 }
1609
1610 if (pair->diff.computed)
1611 ratio = pair->diff.period_ratio;
1612 else
1613 ratio = compute_ratio(he, pair);
1614
1615 if (ratio > 0.0)
1616 scnprintf(buf, size, "%14.6F", ratio);
1617 break;
1618
1619 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1620 /* No point for wdiff number if we are dummy.. */
1621 if (he->dummy) {
1622 scnprintf(buf, size, "N/A");
1623 break;
1624 }
1625
1626 if (pair->diff.computed)
1627 wdiff = pair->diff.wdiff;
1628 else
1629 wdiff = compute_wdiff(he, pair);
1630
1631 if (wdiff != 0)
1632 scnprintf(buf, size, "%14ld", wdiff);
1633 break;
1634
1635 case PERF_HPP_DIFF__FORMULA:
1636 formula_fprintf(he, pair, buf, size);
1637 break;
1638
1639 case PERF_HPP_DIFF__PERIOD:
1640 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1641 break;
1642
1643 default:
1644 BUG_ON(1);
1645 }
1646}
1647
1648static void
1649__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1650 char *buf, size_t size)
1651{
1652 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1653 int idx = dfmt->idx;
1654
1655 /* baseline is special */
1656 if (idx == PERF_HPP_DIFF__BASELINE)
1657 hpp__entry_baseline(he, buf, size);
1658 else {
1659 if (pair)
1660 hpp__entry_pair(he, pair, idx, buf, size);
1661 else
1662 hpp__entry_unpair(he, idx, buf, size);
1663 }
1664}
1665
1666static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1667 struct hist_entry *he)
1668{
1669 struct diff_hpp_fmt *dfmt =
1670 container_of(_fmt, struct diff_hpp_fmt, fmt);
1671 char buf[MAX_COL_WIDTH] = " ";
1672
1673 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1674
1675 if (symbol_conf.field_sep)
1676 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1677 else
1678 return scnprintf(hpp->buf, hpp->size, "%*s",
1679 dfmt->header_width, buf);
1680}
1681
1682static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1683 struct hists *hists __maybe_unused,
1684 int line __maybe_unused,
1685 int *span __maybe_unused)
1686{
1687 struct diff_hpp_fmt *dfmt =
1688 container_of(fmt, struct diff_hpp_fmt, fmt);
1689
1690 BUG_ON(!dfmt->header);
1691 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1692}
1693
1694static int hpp__width(struct perf_hpp_fmt *fmt,
1695 struct perf_hpp *hpp __maybe_unused,
1696 struct hists *hists __maybe_unused)
1697{
1698 struct diff_hpp_fmt *dfmt =
1699 container_of(fmt, struct diff_hpp_fmt, fmt);
1700
1701 BUG_ON(dfmt->header_width <= 0);
1702 return dfmt->header_width;
1703}
1704
1705static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1706{
1707#define MAX_HEADER_NAME 100
1708 char buf_indent[MAX_HEADER_NAME];
1709 char buf[MAX_HEADER_NAME];
1710 const char *header = NULL;
1711 int width = 0;
1712
1713 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1714 header = columns[dfmt->idx].name;
1715 width = columns[dfmt->idx].width;
1716
1717 /* Only our defined HPP fmts should appear here. */
1718 BUG_ON(!header);
1719
1720 if (data__files_cnt > 2)
1721 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1722
1723#define NAME (data__files_cnt > 2 ? buf : header)
1724 dfmt->header_width = width;
1725 width = (int) strlen(NAME);
1726 if (dfmt->header_width < width)
1727 dfmt->header_width = width;
1728
1729 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1730 dfmt->header_width, NAME);
1731
1732 dfmt->header = strdup(buf_indent);
1733#undef MAX_HEADER_NAME
1734#undef NAME
1735}
1736
1737static void data__hpp_register(struct data__file *d, int idx)
1738{
1739 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1740 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1741
1742 dfmt->idx = idx;
1743
1744 fmt->header = hpp__header;
1745 fmt->width = hpp__width;
1746 fmt->entry = hpp__entry_global;
1747 fmt->cmp = hist_entry__cmp_nop;
1748 fmt->collapse = hist_entry__cmp_nop;
1749
1750 /* TODO more colors */
1751 switch (idx) {
1752 case PERF_HPP_DIFF__BASELINE:
1753 fmt->color = hpp__color_baseline;
1754 fmt->sort = hist_entry__cmp_baseline;
1755 break;
1756 case PERF_HPP_DIFF__DELTA:
1757 fmt->color = hpp__color_delta;
1758 fmt->sort = hist_entry__cmp_delta;
1759 break;
1760 case PERF_HPP_DIFF__RATIO:
1761 fmt->color = hpp__color_ratio;
1762 fmt->sort = hist_entry__cmp_ratio;
1763 break;
1764 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1765 fmt->color = hpp__color_wdiff;
1766 fmt->sort = hist_entry__cmp_wdiff;
1767 break;
1768 case PERF_HPP_DIFF__DELTA_ABS:
1769 fmt->color = hpp__color_delta;
1770 fmt->sort = hist_entry__cmp_delta_abs;
1771 break;
1772 case PERF_HPP_DIFF__CYCLES:
1773 fmt->color = hpp__color_cycles;
1774 fmt->sort = hist_entry__cmp_nop;
1775 break;
1776 case PERF_HPP_DIFF__CYCLES_HIST:
1777 fmt->color = hpp__color_cycles_hist;
1778 fmt->sort = hist_entry__cmp_nop;
1779 break;
1780 default:
1781 fmt->sort = hist_entry__cmp_nop;
1782 break;
1783 }
1784
1785 init_header(d, dfmt);
1786 perf_hpp__column_register(fmt);
1787 perf_hpp__register_sort_field(fmt);
1788}
1789
1790static int ui_init(void)
1791{
1792 struct data__file *d;
1793 struct perf_hpp_fmt *fmt;
1794 int i;
1795
1796 data__for_each_file(i, d) {
1797
1798 /*
1799 * Baseline or compute related columns:
1800 *
1801 * PERF_HPP_DIFF__BASELINE
1802 * PERF_HPP_DIFF__DELTA
1803 * PERF_HPP_DIFF__RATIO
1804 * PERF_HPP_DIFF__WEIGHTED_DIFF
1805 * PERF_HPP_DIFF__CYCLES
1806 */
1807 data__hpp_register(d, i ? compute_2_hpp[compute] :
1808 PERF_HPP_DIFF__BASELINE);
1809
1810 if (cycles_hist && i)
1811 data__hpp_register(d, PERF_HPP_DIFF__CYCLES_HIST);
1812
1813 /*
1814 * And the rest:
1815 *
1816 * PERF_HPP_DIFF__FORMULA
1817 * PERF_HPP_DIFF__PERIOD
1818 * PERF_HPP_DIFF__PERIOD_BASELINE
1819 */
1820 if (show_formula && i)
1821 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1822
1823 if (show_period)
1824 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1825 PERF_HPP_DIFF__PERIOD_BASELINE);
1826 }
1827
1828 if (!sort_compute)
1829 return 0;
1830
1831 /*
1832 * Prepend an fmt to sort on columns at 'sort_compute' first.
1833 * This fmt is added only to the sort list but not to the
1834 * output fields list.
1835 *
1836 * Note that this column (data) can be compared twice - one
1837 * for this 'sort_compute' fmt and another for the normal
1838 * diff_hpp_fmt. But it shouldn't a problem as most entries
1839 * will be sorted out by first try or baseline and comparing
1840 * is not a costly operation.
1841 */
1842 fmt = zalloc(sizeof(*fmt));
1843 if (fmt == NULL) {
1844 pr_err("Memory allocation failed\n");
1845 return -1;
1846 }
1847
1848 fmt->cmp = hist_entry__cmp_nop;
1849 fmt->collapse = hist_entry__cmp_nop;
1850
1851 switch (compute) {
1852 case COMPUTE_DELTA:
1853 fmt->sort = hist_entry__cmp_delta_idx;
1854 break;
1855 case COMPUTE_RATIO:
1856 fmt->sort = hist_entry__cmp_ratio_idx;
1857 break;
1858 case COMPUTE_WEIGHTED_DIFF:
1859 fmt->sort = hist_entry__cmp_wdiff_idx;
1860 break;
1861 case COMPUTE_DELTA_ABS:
1862 fmt->sort = hist_entry__cmp_delta_abs_idx;
1863 break;
1864 case COMPUTE_CYCLES:
1865 /*
1866 * Should set since 'fmt->sort' is called without
1867 * checking valid during sorting
1868 */
1869 fmt->sort = hist_entry__cmp_nop;
1870 break;
1871 default:
1872 BUG_ON(1);
1873 }
1874
1875 perf_hpp__prepend_sort_field(fmt);
1876 return 0;
1877}
1878
1879static int data_init(int argc, const char **argv)
1880{
1881 struct data__file *d;
1882 static const char *defaults[] = {
1883 "perf.data.old",
1884 "perf.data",
1885 };
1886 bool use_default = true;
1887 int i;
1888
1889 data__files_cnt = 2;
1890
1891 if (argc) {
1892 if (argc == 1)
1893 defaults[1] = argv[0];
1894 else {
1895 data__files_cnt = argc;
1896 use_default = false;
1897 }
1898 } else if (perf_guest) {
1899 defaults[0] = "perf.data.host";
1900 defaults[1] = "perf.data.guest";
1901 }
1902
1903 if (sort_compute >= (unsigned int) data__files_cnt) {
1904 pr_err("Order option out of limit.\n");
1905 return -EINVAL;
1906 }
1907
1908 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1909 if (!data__files)
1910 return -ENOMEM;
1911
1912 data__for_each_file(i, d) {
1913 struct perf_data *data = &d->data;
1914
1915 data->path = use_default ? defaults[i] : argv[i];
1916 data->mode = PERF_DATA_MODE_READ,
1917 data->force = force,
1918
1919 d->idx = i;
1920 }
1921
1922 return 0;
1923}
1924
1925static int diff__config(const char *var, const char *value,
1926 void *cb __maybe_unused)
1927{
1928 if (!strcmp(var, "diff.order")) {
1929 int ret;
1930 if (perf_config_int(&ret, var, value) < 0)
1931 return -1;
1932 sort_compute = ret;
1933 return 0;
1934 }
1935 if (!strcmp(var, "diff.compute")) {
1936 if (!strcmp(value, "delta")) {
1937 compute = COMPUTE_DELTA;
1938 } else if (!strcmp(value, "delta-abs")) {
1939 compute = COMPUTE_DELTA_ABS;
1940 } else if (!strcmp(value, "ratio")) {
1941 compute = COMPUTE_RATIO;
1942 } else if (!strcmp(value, "wdiff")) {
1943 compute = COMPUTE_WEIGHTED_DIFF;
1944 } else {
1945 pr_err("Invalid compute method: %s\n", value);
1946 return -1;
1947 }
1948 }
1949
1950 return 0;
1951}
1952
1953int cmd_diff(int argc, const char **argv)
1954{
1955 int ret = hists__init();
1956
1957 if (ret < 0)
1958 return ret;
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}