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perf ui: Get rid of callback from __hpp__fmt()
[deliverable/linux.git] / tools / perf / builtin-diff.c
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CommitLineData
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 = hists__total_period(he->hists);
224
225 return (period * 100.0) / total;
226}
227
228static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
229{
230 double old_percent = period_percent(he, he->stat.period);
231 double new_percent = period_percent(pair, pair->stat.period);
232
233 pair->diff.period_ratio_delta = new_percent - old_percent;
234 pair->diff.computed = true;
235 return pair->diff.period_ratio_delta;
236}
237
238static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
239{
240 double old_period = he->stat.period ?: 1;
241 double new_period = pair->stat.period;
242
243 pair->diff.computed = true;
244 pair->diff.period_ratio = new_period / old_period;
245 return pair->diff.period_ratio;
246}
247
248static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
249{
250 u64 old_period = he->stat.period;
251 u64 new_period = pair->stat.period;
252
253 pair->diff.computed = true;
254 pair->diff.wdiff = new_period * compute_wdiff_w2 -
255 old_period * compute_wdiff_w1;
256
257 return pair->diff.wdiff;
258}
259
260static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
261 char *buf, size_t size)
262{
263 u64 he_total = he->hists->stats.total_period;
264 u64 pair_total = pair->hists->stats.total_period;
265
266 if (symbol_conf.filter_relative) {
267 he_total = he->hists->stats.total_non_filtered_period;
268 pair_total = pair->hists->stats.total_non_filtered_period;
269 }
270 return scnprintf(buf, size,
271 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
272 "(%" PRIu64 " * 100 / %" PRIu64 ")",
273 pair->stat.period, pair_total,
274 he->stat.period, he_total);
275}
276
277static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
278 char *buf, size_t size)
279{
280 double old_period = he->stat.period;
281 double new_period = pair->stat.period;
282
283 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
284}
285
286static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
287 char *buf, size_t size)
288{
289 u64 old_period = he->stat.period;
290 u64 new_period = pair->stat.period;
291
292 return scnprintf(buf, size,
293 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
294 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
295}
296
297static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
298 char *buf, size_t size)
299{
300 switch (compute) {
301 case COMPUTE_DELTA:
302 return formula_delta(he, pair, buf, size);
303 case COMPUTE_RATIO:
304 return formula_ratio(he, pair, buf, size);
305 case COMPUTE_WEIGHTED_DIFF:
306 return formula_wdiff(he, pair, buf, size);
307 default:
308 BUG_ON(1);
309 }
310
311 return -1;
312}
313
314static int hists__add_entry(struct hists *hists,
315 struct addr_location *al, u64 period,
316 u64 weight, u64 transaction)
317{
318 if (__hists__add_entry(hists, al, NULL, NULL, NULL, period, weight,
319 transaction) != NULL)
320 return 0;
321 return -ENOMEM;
322}
323
324static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
325 union perf_event *event,
326 struct perf_sample *sample,
327 struct perf_evsel *evsel,
328 struct machine *machine)
329{
330 struct addr_location al;
331
332 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
333 pr_warning("problem processing %d event, skipping it.\n",
334 event->header.type);
335 return -1;
336 }
337
338 if (hists__add_entry(&evsel->hists, &al, sample->period,
339 sample->weight, sample->transaction)) {
340 pr_warning("problem incrementing symbol period, skipping event\n");
341 return -1;
342 }
343
344 /*
345 * The total_period is updated here before going to the output
346 * tree since normally only the baseline hists will call
347 * hists__output_resort() and precompute needs the total
348 * period in order to sort entries by percentage delta.
349 */
350 evsel->hists.stats.total_period += sample->period;
351 if (!al.filtered)
352 evsel->hists.stats.total_non_filtered_period += sample->period;
353
354 return 0;
355}
356
357static struct perf_tool tool = {
358 .sample = diff__process_sample_event,
359 .mmap = perf_event__process_mmap,
360 .comm = perf_event__process_comm,
361 .exit = perf_event__process_exit,
362 .fork = perf_event__process_fork,
363 .lost = perf_event__process_lost,
364 .ordered_samples = true,
365 .ordering_requires_timestamps = true,
366};
367
368static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
369 struct perf_evlist *evlist)
370{
371 struct perf_evsel *e;
372
373 evlist__for_each(evlist, e) {
374 if (perf_evsel__match2(evsel, e))
375 return e;
376 }
377
378 return NULL;
379}
380
381static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
382{
383 struct perf_evsel *evsel;
384
385 evlist__for_each(evlist, evsel) {
386 struct hists *hists = &evsel->hists;
387
388 hists__collapse_resort(hists, NULL);
389 }
390}
391
392static struct hist_entry*
393get_pair_data(struct hist_entry *he, struct data__file *d)
394{
395 if (hist_entry__has_pairs(he)) {
396 struct hist_entry *pair;
397
398 list_for_each_entry(pair, &he->pairs.head, pairs.node)
399 if (pair->hists == d->hists)
400 return pair;
401 }
402
403 return NULL;
404}
405
406static struct hist_entry*
407get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
408{
409 void *ptr = dfmt - dfmt->idx;
410 struct data__file *d = container_of(ptr, struct data__file, fmt);
411
412 return get_pair_data(he, d);
413}
414
415static void hists__baseline_only(struct hists *hists)
416{
417 struct rb_root *root;
418 struct rb_node *next;
419
420 if (sort__need_collapse)
421 root = &hists->entries_collapsed;
422 else
423 root = hists->entries_in;
424
425 next = rb_first(root);
426 while (next != NULL) {
427 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
428
429 next = rb_next(&he->rb_node_in);
430 if (!hist_entry__next_pair(he)) {
431 rb_erase(&he->rb_node_in, root);
432 hist_entry__free(he);
433 }
434 }
435}
436
437static void hists__precompute(struct hists *hists)
438{
439 struct rb_root *root;
440 struct rb_node *next;
441
442 if (sort__need_collapse)
443 root = &hists->entries_collapsed;
444 else
445 root = hists->entries_in;
446
447 next = rb_first(root);
448 while (next != NULL) {
449 struct hist_entry *he, *pair;
450
451 he = rb_entry(next, struct hist_entry, rb_node_in);
452 next = rb_next(&he->rb_node_in);
453
454 pair = get_pair_data(he, &data__files[sort_compute]);
455 if (!pair)
456 continue;
457
458 switch (compute) {
459 case COMPUTE_DELTA:
460 compute_delta(he, pair);
461 break;
462 case COMPUTE_RATIO:
463 compute_ratio(he, pair);
464 break;
465 case COMPUTE_WEIGHTED_DIFF:
466 compute_wdiff(he, pair);
467 break;
468 default:
469 BUG_ON(1);
470 }
471 }
472}
473
474static int64_t cmp_doubles(double l, double r)
475{
476 if (l > r)
477 return -1;
478 else if (l < r)
479 return 1;
480 else
481 return 0;
482}
483
484static int64_t
485__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
486 int c)
487{
488 switch (c) {
489 case COMPUTE_DELTA:
490 {
491 double l = left->diff.period_ratio_delta;
492 double r = right->diff.period_ratio_delta;
493
494 return cmp_doubles(l, r);
495 }
496 case COMPUTE_RATIO:
497 {
498 double l = left->diff.period_ratio;
499 double r = right->diff.period_ratio;
500
501 return cmp_doubles(l, r);
502 }
503 case COMPUTE_WEIGHTED_DIFF:
504 {
505 s64 l = left->diff.wdiff;
506 s64 r = right->diff.wdiff;
507
508 return r - l;
509 }
510 default:
511 BUG_ON(1);
512 }
513
514 return 0;
515}
516
517static int64_t
518hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
519 int c)
520{
521 bool pairs_left = hist_entry__has_pairs(left);
522 bool pairs_right = hist_entry__has_pairs(right);
523 struct hist_entry *p_right, *p_left;
524
525 if (!pairs_left && !pairs_right)
526 return 0;
527
528 if (!pairs_left || !pairs_right)
529 return pairs_left ? -1 : 1;
530
531 p_left = get_pair_data(left, &data__files[sort_compute]);
532 p_right = get_pair_data(right, &data__files[sort_compute]);
533
534 if (!p_left && !p_right)
535 return 0;
536
537 if (!p_left || !p_right)
538 return p_left ? -1 : 1;
539
540 /*
541 * We have 2 entries of same kind, let's
542 * make the data comparison.
543 */
544 return __hist_entry__cmp_compute(p_left, p_right, c);
545}
546
547static void insert_hist_entry_by_compute(struct rb_root *root,
548 struct hist_entry *he,
549 int c)
550{
551 struct rb_node **p = &root->rb_node;
552 struct rb_node *parent = NULL;
553 struct hist_entry *iter;
554
555 while (*p != NULL) {
556 parent = *p;
557 iter = rb_entry(parent, struct hist_entry, rb_node);
558 if (hist_entry__cmp_compute(he, iter, c) < 0)
559 p = &(*p)->rb_left;
560 else
561 p = &(*p)->rb_right;
562 }
563
564 rb_link_node(&he->rb_node, parent, p);
565 rb_insert_color(&he->rb_node, root);
566}
567
568static void hists__compute_resort(struct hists *hists)
569{
570 struct rb_root *root;
571 struct rb_node *next;
572
573 if (sort__need_collapse)
574 root = &hists->entries_collapsed;
575 else
576 root = hists->entries_in;
577
578 hists->entries = RB_ROOT;
579 next = rb_first(root);
580
581 hists__reset_stats(hists);
582 hists__reset_col_len(hists);
583
584 while (next != NULL) {
585 struct hist_entry *he;
586
587 he = rb_entry(next, struct hist_entry, rb_node_in);
588 next = rb_next(&he->rb_node_in);
589
590 insert_hist_entry_by_compute(&hists->entries, he, compute);
591 hists__inc_stats(hists, he);
592
593 if (!he->filtered)
594 hists__calc_col_len(hists, he);
595 }
596}
597
598static void hists__process(struct hists *hists)
599{
600 if (show_baseline_only)
601 hists__baseline_only(hists);
602
603 if (sort_compute) {
604 hists__precompute(hists);
605 hists__compute_resort(hists);
606 } else {
607 hists__output_resort(hists);
608 }
609
610 hists__fprintf(hists, true, 0, 0, 0, stdout);
611}
612
613static void data__fprintf(void)
614{
615 struct data__file *d;
616 int i;
617
618 fprintf(stdout, "# Data files:\n");
619
620 data__for_each_file(i, d)
621 fprintf(stdout, "# [%d] %s %s\n",
622 d->idx, d->file.path,
623 !d->idx ? "(Baseline)" : "");
624
625 fprintf(stdout, "#\n");
626}
627
628static void data_process(void)
629{
630 struct perf_evlist *evlist_base = data__files[0].session->evlist;
631 struct perf_evsel *evsel_base;
632 bool first = true;
633
634 evlist__for_each(evlist_base, evsel_base) {
635 struct data__file *d;
636 int i;
637
638 data__for_each_file_new(i, d) {
639 struct perf_evlist *evlist = d->session->evlist;
640 struct perf_evsel *evsel;
641
642 evsel = evsel_match(evsel_base, evlist);
643 if (!evsel)
644 continue;
645
646 d->hists = &evsel->hists;
647
648 hists__match(&evsel_base->hists, &evsel->hists);
649
650 if (!show_baseline_only)
651 hists__link(&evsel_base->hists,
652 &evsel->hists);
653 }
654
655 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
656 perf_evsel__name(evsel_base));
657
658 first = false;
659
660 if (verbose || data__files_cnt > 2)
661 data__fprintf();
662
663 hists__process(&evsel_base->hists);
664 }
665}
666
667static void data__free(struct data__file *d)
668{
669 int col;
670
671 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
672 struct diff_hpp_fmt *fmt = &d->fmt[col];
673
674 zfree(&fmt->header);
675 }
676}
677
678static int __cmd_diff(void)
679{
680 struct data__file *d;
681 int ret = -EINVAL, i;
682
683 data__for_each_file(i, d) {
684 d->session = perf_session__new(&d->file, false, &tool);
685 if (!d->session) {
686 pr_err("Failed to open %s\n", d->file.path);
687 ret = -ENOMEM;
688 goto out_delete;
689 }
690
691 ret = perf_session__process_events(d->session, &tool);
692 if (ret) {
693 pr_err("Failed to process %s\n", d->file.path);
694 goto out_delete;
695 }
696
697 perf_evlist__collapse_resort(d->session->evlist);
698 }
699
700 data_process();
701
702 out_delete:
703 data__for_each_file(i, d) {
704 if (d->session)
705 perf_session__delete(d->session);
706
707 data__free(d);
708 }
709
710 free(data__files);
711 return ret;
712}
713
714static const char * const diff_usage[] = {
715 "perf diff [<options>] [old_file] [new_file]",
716 NULL,
717};
718
719static const struct option options[] = {
720 OPT_INCR('v', "verbose", &verbose,
721 "be more verbose (show symbol address, etc)"),
722 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
723 "Show only items with match in baseline"),
724 OPT_CALLBACK('c', "compute", &compute,
725 "delta,ratio,wdiff:w1,w2 (default delta)",
726 "Entries differential computation selection",
727 setup_compute),
728 OPT_BOOLEAN('p', "period", &show_period,
729 "Show period values."),
730 OPT_BOOLEAN('F', "formula", &show_formula,
731 "Show formula."),
732 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
733 "dump raw trace in ASCII"),
734 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
735 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
736 "load module symbols - WARNING: use only with -k and LIVE kernel"),
737 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
738 "only consider symbols in these dsos"),
739 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
740 "only consider symbols in these comms"),
741 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
742 "only consider these symbols"),
743 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
744 "sort by key(s): pid, comm, dso, symbol, parent"),
745 OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
746 "separator for columns, no spaces will be added between "
747 "columns '.' is reserved."),
748 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
749 "Look for files with symbols relative to this directory"),
750 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
751 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
752 "How to display percentage of filtered entries", parse_filter_percentage),
753 OPT_END()
754};
755
756static double baseline_percent(struct hist_entry *he)
757{
758 u64 total = hists__total_period(he->hists);
759
760 return 100.0 * he->stat.period / total;
761}
762
763static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
764 struct perf_hpp *hpp, struct hist_entry *he)
765{
766 struct diff_hpp_fmt *dfmt =
767 container_of(fmt, struct diff_hpp_fmt, fmt);
768 double percent = baseline_percent(he);
769 char pfmt[20] = " ";
770
771 if (!he->dummy) {
772 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
773 return percent_color_snprintf(hpp->buf, hpp->size,
774 pfmt, percent);
775 } else
776 return scnprintf(hpp->buf, hpp->size, "%*s",
777 dfmt->header_width, pfmt);
778}
779
780static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
781{
782 double percent = baseline_percent(he);
783 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
784 int ret = 0;
785
786 if (!he->dummy)
787 ret = scnprintf(buf, size, fmt, percent);
788
789 return ret;
790}
791
792static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
793 struct perf_hpp *hpp, struct hist_entry *he,
794 int comparison_method)
795{
796 struct diff_hpp_fmt *dfmt =
797 container_of(fmt, struct diff_hpp_fmt, fmt);
798 struct hist_entry *pair = get_pair_fmt(he, dfmt);
799 double diff;
800 s64 wdiff;
801 char pfmt[20] = " ";
802
803 if (!pair)
804 goto dummy_print;
805
806 switch (comparison_method) {
807 case COMPUTE_DELTA:
808 if (pair->diff.computed)
809 diff = pair->diff.period_ratio_delta;
810 else
811 diff = compute_delta(he, pair);
812
813 if (fabs(diff) < 0.01)
814 goto dummy_print;
815 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
816 return percent_color_snprintf(hpp->buf, hpp->size,
817 pfmt, diff);
818 case COMPUTE_RATIO:
819 if (he->dummy)
820 goto dummy_print;
821 if (pair->diff.computed)
822 diff = pair->diff.period_ratio;
823 else
824 diff = compute_ratio(he, pair);
825
826 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
827 return value_color_snprintf(hpp->buf, hpp->size,
828 pfmt, diff);
829 case COMPUTE_WEIGHTED_DIFF:
830 if (he->dummy)
831 goto dummy_print;
832 if (pair->diff.computed)
833 wdiff = pair->diff.wdiff;
834 else
835 wdiff = compute_wdiff(he, pair);
836
837 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
838 return color_snprintf(hpp->buf, hpp->size,
839 get_percent_color(wdiff),
840 pfmt, wdiff);
841 default:
842 BUG_ON(1);
843 }
844dummy_print:
845 return scnprintf(hpp->buf, hpp->size, "%*s",
846 dfmt->header_width, pfmt);
847}
848
849static int hpp__color_delta(struct perf_hpp_fmt *fmt,
850 struct perf_hpp *hpp, struct hist_entry *he)
851{
852 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
853}
854
855static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
856 struct perf_hpp *hpp, struct hist_entry *he)
857{
858 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
859}
860
861static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
862 struct perf_hpp *hpp, struct hist_entry *he)
863{
864 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
865}
866
867static void
868hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
869{
870 switch (idx) {
871 case PERF_HPP_DIFF__PERIOD_BASELINE:
872 scnprintf(buf, size, "%" PRIu64, he->stat.period);
873 break;
874
875 default:
876 break;
877 }
878}
879
880static void
881hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
882 int idx, char *buf, size_t size)
883{
884 double diff;
885 double ratio;
886 s64 wdiff;
887
888 switch (idx) {
889 case PERF_HPP_DIFF__DELTA:
890 if (pair->diff.computed)
891 diff = pair->diff.period_ratio_delta;
892 else
893 diff = compute_delta(he, pair);
894
895 if (fabs(diff) >= 0.01)
896 scnprintf(buf, size, "%+4.2F%%", diff);
897 break;
898
899 case PERF_HPP_DIFF__RATIO:
900 /* No point for ratio number if we are dummy.. */
901 if (he->dummy)
902 break;
903
904 if (pair->diff.computed)
905 ratio = pair->diff.period_ratio;
906 else
907 ratio = compute_ratio(he, pair);
908
909 if (ratio > 0.0)
910 scnprintf(buf, size, "%14.6F", ratio);
911 break;
912
913 case PERF_HPP_DIFF__WEIGHTED_DIFF:
914 /* No point for wdiff number if we are dummy.. */
915 if (he->dummy)
916 break;
917
918 if (pair->diff.computed)
919 wdiff = pair->diff.wdiff;
920 else
921 wdiff = compute_wdiff(he, pair);
922
923 if (wdiff != 0)
924 scnprintf(buf, size, "%14ld", wdiff);
925 break;
926
927 case PERF_HPP_DIFF__FORMULA:
928 formula_fprintf(he, pair, buf, size);
929 break;
930
931 case PERF_HPP_DIFF__PERIOD:
932 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
933 break;
934
935 default:
936 BUG_ON(1);
937 };
938}
939
940static void
941__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
942 char *buf, size_t size)
943{
944 struct hist_entry *pair = get_pair_fmt(he, dfmt);
945 int idx = dfmt->idx;
946
947 /* baseline is special */
948 if (idx == PERF_HPP_DIFF__BASELINE)
949 hpp__entry_baseline(he, buf, size);
950 else {
951 if (pair)
952 hpp__entry_pair(he, pair, idx, buf, size);
953 else
954 hpp__entry_unpair(he, idx, buf, size);
955 }
956}
957
958static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
959 struct hist_entry *he)
960{
961 struct diff_hpp_fmt *dfmt =
962 container_of(_fmt, struct diff_hpp_fmt, fmt);
963 char buf[MAX_COL_WIDTH] = " ";
964
965 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
966
967 if (symbol_conf.field_sep)
968 return scnprintf(hpp->buf, hpp->size, "%s", buf);
969 else
970 return scnprintf(hpp->buf, hpp->size, "%*s",
971 dfmt->header_width, buf);
972}
973
974static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
975 struct perf_evsel *evsel __maybe_unused)
976{
977 struct diff_hpp_fmt *dfmt =
978 container_of(fmt, struct diff_hpp_fmt, fmt);
979
980 BUG_ON(!dfmt->header);
981 return scnprintf(hpp->buf, hpp->size, dfmt->header);
982}
983
984static int hpp__width(struct perf_hpp_fmt *fmt,
985 struct perf_hpp *hpp __maybe_unused,
986 struct perf_evsel *evsel __maybe_unused)
987{
988 struct diff_hpp_fmt *dfmt =
989 container_of(fmt, struct diff_hpp_fmt, fmt);
990
991 BUG_ON(dfmt->header_width <= 0);
992 return dfmt->header_width;
993}
994
995static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
996{
997#define MAX_HEADER_NAME 100
998 char buf_indent[MAX_HEADER_NAME];
999 char buf[MAX_HEADER_NAME];
1000 const char *header = NULL;
1001 int width = 0;
1002
1003 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1004 header = columns[dfmt->idx].name;
1005 width = columns[dfmt->idx].width;
1006
1007 /* Only our defined HPP fmts should appear here. */
1008 BUG_ON(!header);
1009
1010 if (data__files_cnt > 2)
1011 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1012
1013#define NAME (data__files_cnt > 2 ? buf : header)
1014 dfmt->header_width = width;
1015 width = (int) strlen(NAME);
1016 if (dfmt->header_width < width)
1017 dfmt->header_width = width;
1018
1019 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1020 dfmt->header_width, NAME);
1021
1022 dfmt->header = strdup(buf_indent);
1023#undef MAX_HEADER_NAME
1024#undef NAME
1025}
1026
1027static void data__hpp_register(struct data__file *d, int idx)
1028{
1029 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1030 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1031
1032 dfmt->idx = idx;
1033
1034 fmt->header = hpp__header;
1035 fmt->width = hpp__width;
1036 fmt->entry = hpp__entry_global;
1037
1038 /* TODO more colors */
1039 switch (idx) {
1040 case PERF_HPP_DIFF__BASELINE:
1041 fmt->color = hpp__color_baseline;
1042 break;
1043 case PERF_HPP_DIFF__DELTA:
1044 fmt->color = hpp__color_delta;
1045 break;
1046 case PERF_HPP_DIFF__RATIO:
1047 fmt->color = hpp__color_ratio;
1048 break;
1049 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1050 fmt->color = hpp__color_wdiff;
1051 break;
1052 default:
1053 break;
1054 }
1055
1056 init_header(d, dfmt);
1057 perf_hpp__column_register(fmt);
1058}
1059
1060static void ui_init(void)
1061{
1062 struct data__file *d;
1063 int i;
1064
1065 data__for_each_file(i, d) {
1066
1067 /*
1068 * Baseline or compute realted columns:
1069 *
1070 * PERF_HPP_DIFF__BASELINE
1071 * PERF_HPP_DIFF__DELTA
1072 * PERF_HPP_DIFF__RATIO
1073 * PERF_HPP_DIFF__WEIGHTED_DIFF
1074 */
1075 data__hpp_register(d, i ? compute_2_hpp[compute] :
1076 PERF_HPP_DIFF__BASELINE);
1077
1078 /*
1079 * And the rest:
1080 *
1081 * PERF_HPP_DIFF__FORMULA
1082 * PERF_HPP_DIFF__PERIOD
1083 * PERF_HPP_DIFF__PERIOD_BASELINE
1084 */
1085 if (show_formula && i)
1086 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1087
1088 if (show_period)
1089 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1090 PERF_HPP_DIFF__PERIOD_BASELINE);
1091 }
1092}
1093
1094static int data_init(int argc, const char **argv)
1095{
1096 struct data__file *d;
1097 static const char *defaults[] = {
1098 "perf.data.old",
1099 "perf.data",
1100 };
1101 bool use_default = true;
1102 int i;
1103
1104 data__files_cnt = 2;
1105
1106 if (argc) {
1107 if (argc == 1)
1108 defaults[1] = argv[0];
1109 else {
1110 data__files_cnt = argc;
1111 use_default = false;
1112 }
1113 } else if (perf_guest) {
1114 defaults[0] = "perf.data.host";
1115 defaults[1] = "perf.data.guest";
1116 }
1117
1118 if (sort_compute >= (unsigned int) data__files_cnt) {
1119 pr_err("Order option out of limit.\n");
1120 return -EINVAL;
1121 }
1122
1123 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1124 if (!data__files)
1125 return -ENOMEM;
1126
1127 data__for_each_file(i, d) {
1128 struct perf_data_file *file = &d->file;
1129
1130 file->path = use_default ? defaults[i] : argv[i];
1131 file->mode = PERF_DATA_MODE_READ,
1132 file->force = force,
1133
1134 d->idx = i;
1135 }
1136
1137 return 0;
1138}
1139
1140int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1141{
1142 perf_config(perf_default_config, NULL);
1143
1144 sort_order = diff__default_sort_order;
1145 argc = parse_options(argc, argv, options, diff_usage, 0);
1146
1147 if (symbol__init() < 0)
1148 return -1;
1149
1150 if (data_init(argc, argv) < 0)
1151 return -1;
1152
1153 ui_init();
1154
1155 if (setup_sorting() < 0)
1156 usage_with_options(diff_usage, options);
1157
1158 setup_pager();
1159
1160 sort__setup_elide(NULL);
1161
1162 return __cmd_diff();
1163}
Linux kernel - Deliverables
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