projects/linux·blob v3.13 · refs

1052 lines · 22.9 KiB

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 list_for_each_entry(e, &evlist->entries, node)
360 if (perf_evsel__match2(evsel, e))
361 return e;
362
363 return NULL;
364}
365
366static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
367{
368 struct perf_evsel *evsel;
369
370 list_for_each_entry(evsel, &evlist->entries, node) {
371 struct hists *hists = &evsel->hists;
372
373 hists__collapse_resort(hists, NULL);
374 }
375}
376
377static struct hist_entry*
378get_pair_data(struct hist_entry *he, struct data__file *d)
379{
380 if (hist_entry__has_pairs(he)) {
381 struct hist_entry *pair;
382
383 list_for_each_entry(pair, &he->pairs.head, pairs.node)
384 if (pair->hists == d->hists)
385 return pair;
386 }
387
388 return NULL;
389}
390
391static struct hist_entry*
392get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
393{
394 void *ptr = dfmt - dfmt->idx;
395 struct data__file *d = container_of(ptr, struct data__file, fmt);
396
397 return get_pair_data(he, d);
398}
399
400static void hists__baseline_only(struct hists *hists)
401{
402 struct rb_root *root;
403 struct rb_node *next;
404
405 if (sort__need_collapse)
406 root = &hists->entries_collapsed;
407 else
408 root = hists->entries_in;
409
410 next = rb_first(root);
411 while (next != NULL) {
412 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
413
414 next = rb_next(&he->rb_node_in);
415 if (!hist_entry__next_pair(he)) {
416 rb_erase(&he->rb_node_in, root);
417 hist_entry__free(he);
418 }
419 }
420}
421
422static void hists__precompute(struct hists *hists)
423{
424 struct rb_root *root;
425 struct rb_node *next;
426
427 if (sort__need_collapse)
428 root = &hists->entries_collapsed;
429 else
430 root = hists->entries_in;
431
432 next = rb_first(root);
433 while (next != NULL) {
434 struct hist_entry *he, *pair;
435
436 he = rb_entry(next, struct hist_entry, rb_node_in);
437 next = rb_next(&he->rb_node_in);
438
439 pair = get_pair_data(he, &data__files[sort_compute]);
440 if (!pair)
441 continue;
442
443 switch (compute) {
444 case COMPUTE_DELTA:
445 compute_delta(he, pair);
446 break;
447 case COMPUTE_RATIO:
448 compute_ratio(he, pair);
449 break;
450 case COMPUTE_WEIGHTED_DIFF:
451 compute_wdiff(he, pair);
452 break;
453 default:
454 BUG_ON(1);
455 }
456 }
457}
458
459static int64_t cmp_doubles(double l, double r)
460{
461 if (l > r)
462 return -1;
463 else if (l < r)
464 return 1;
465 else
466 return 0;
467}
468
469static int64_t
470__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
471 int c)
472{
473 switch (c) {
474 case COMPUTE_DELTA:
475 {
476 double l = left->diff.period_ratio_delta;
477 double r = right->diff.period_ratio_delta;
478
479 return cmp_doubles(l, r);
480 }
481 case COMPUTE_RATIO:
482 {
483 double l = left->diff.period_ratio;
484 double r = right->diff.period_ratio;
485
486 return cmp_doubles(l, r);
487 }
488 case COMPUTE_WEIGHTED_DIFF:
489 {
490 s64 l = left->diff.wdiff;
491 s64 r = right->diff.wdiff;
492
493 return r - l;
494 }
495 default:
496 BUG_ON(1);
497 }
498
499 return 0;
500}
501
502static int64_t
503hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
504 int c)
505{
506 bool pairs_left = hist_entry__has_pairs(left);
507 bool pairs_right = hist_entry__has_pairs(right);
508 struct hist_entry *p_right, *p_left;
509
510 if (!pairs_left && !pairs_right)
511 return 0;
512
513 if (!pairs_left || !pairs_right)
514 return pairs_left ? -1 : 1;
515
516 p_left = get_pair_data(left, &data__files[sort_compute]);
517 p_right = get_pair_data(right, &data__files[sort_compute]);
518
519 if (!p_left && !p_right)
520 return 0;
521
522 if (!p_left || !p_right)
523 return p_left ? -1 : 1;
524
525 /*
526 * We have 2 entries of same kind, let's
527 * make the data comparison.
528 */
529 return __hist_entry__cmp_compute(p_left, p_right, c);
530}
531
532static void insert_hist_entry_by_compute(struct rb_root *root,
533 struct hist_entry *he,
534 int c)
535{
536 struct rb_node **p = &root->rb_node;
537 struct rb_node *parent = NULL;
538 struct hist_entry *iter;
539
540 while (*p != NULL) {
541 parent = *p;
542 iter = rb_entry(parent, struct hist_entry, rb_node);
543 if (hist_entry__cmp_compute(he, iter, c) < 0)
544 p = &(*p)->rb_left;
545 else
546 p = &(*p)->rb_right;
547 }
548
549 rb_link_node(&he->rb_node, parent, p);
550 rb_insert_color(&he->rb_node, root);
551}
552
553static void hists__compute_resort(struct hists *hists)
554{
555 struct rb_root *root;
556 struct rb_node *next;
557
558 if (sort__need_collapse)
559 root = &hists->entries_collapsed;
560 else
561 root = hists->entries_in;
562
563 hists->entries = RB_ROOT;
564 next = rb_first(root);
565
566 hists->nr_entries = 0;
567 hists->stats.total_period = 0;
568 hists__reset_col_len(hists);
569
570 while (next != NULL) {
571 struct hist_entry *he;
572
573 he = rb_entry(next, struct hist_entry, rb_node_in);
574 next = rb_next(&he->rb_node_in);
575
576 insert_hist_entry_by_compute(&hists->entries, he, compute);
577 hists__inc_nr_entries(hists, he);
578 }
579}
580
581static void hists__process(struct hists *hists)
582{
583 if (show_baseline_only)
584 hists__baseline_only(hists);
585
586 if (sort_compute) {
587 hists__precompute(hists);
588 hists__compute_resort(hists);
589 } else {
590 hists__output_resort(hists);
591 }
592
593 hists__fprintf(hists, true, 0, 0, 0, stdout);
594}
595
596static void data__fprintf(void)
597{
598 struct data__file *d;
599 int i;
600
601 fprintf(stdout, "# Data files:\n");
602
603 data__for_each_file(i, d)
604 fprintf(stdout, "# [%d] %s %s\n",
605 d->idx, d->file.path,
606 !d->idx ? "(Baseline)" : "");
607
608 fprintf(stdout, "#\n");
609}
610
611static void data_process(void)
612{
613 struct perf_evlist *evlist_base = data__files[0].session->evlist;
614 struct perf_evsel *evsel_base;
615 bool first = true;
616
617 list_for_each_entry(evsel_base, &evlist_base->entries, node) {
618 struct data__file *d;
619 int i;
620
621 data__for_each_file_new(i, d) {
622 struct perf_evlist *evlist = d->session->evlist;
623 struct perf_evsel *evsel;
624
625 evsel = evsel_match(evsel_base, evlist);
626 if (!evsel)
627 continue;
628
629 d->hists = &evsel->hists;
630
631 hists__match(&evsel_base->hists, &evsel->hists);
632
633 if (!show_baseline_only)
634 hists__link(&evsel_base->hists,
635 &evsel->hists);
636 }
637
638 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
639 perf_evsel__name(evsel_base));
640
641 first = false;
642
643 if (verbose || data__files_cnt > 2)
644 data__fprintf();
645
646 hists__process(&evsel_base->hists);
647 }
648}
649
650static void data__free(struct data__file *d)
651{
652 int col;
653
654 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
655 struct diff_hpp_fmt *fmt = &d->fmt[col];
656
657 free(fmt->header);
658 }
659}
660
661static int __cmd_diff(void)
662{
663 struct data__file *d;
664 int ret = -EINVAL, i;
665
666 data__for_each_file(i, d) {
667 d->session = perf_session__new(&d->file, false, &tool);
668 if (!d->session) {
669 pr_err("Failed to open %s\n", d->file.path);
670 ret = -ENOMEM;
671 goto out_delete;
672 }
673
674 ret = perf_session__process_events(d->session, &tool);
675 if (ret) {
676 pr_err("Failed to process %s\n", d->file.path);
677 goto out_delete;
678 }
679
680 perf_evlist__collapse_resort(d->session->evlist);
681 }
682
683 data_process();
684
685 out_delete:
686 data__for_each_file(i, d) {
687 if (d->session)
688 perf_session__delete(d->session);
689
690 data__free(d);
691 }
692
693 free(data__files);
694 return ret;
695}
696
697static const char * const diff_usage[] = {
698 "perf diff [<options>] [old_file] [new_file]",
699 NULL,
700};
701
702static const struct option options[] = {
703 OPT_INCR('v', "verbose", &verbose,
704 "be more verbose (show symbol address, etc)"),
705 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
706 "Show only items with match in baseline"),
707 OPT_CALLBACK('c', "compute", &compute,
708 "delta,ratio,wdiff:w1,w2 (default delta)",
709 "Entries differential computation selection",
710 setup_compute),
711 OPT_BOOLEAN('p', "period", &show_period,
712 "Show period values."),
713 OPT_BOOLEAN('F', "formula", &show_formula,
714 "Show formula."),
715 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
716 "dump raw trace in ASCII"),
717 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
718 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
719 "load module symbols - WARNING: use only with -k and LIVE kernel"),
720 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
721 "only consider symbols in these dsos"),
722 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
723 "only consider symbols in these comms"),
724 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
725 "only consider these symbols"),
726 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
727 "sort by key(s): pid, comm, dso, symbol, parent"),
728 OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
729 "separator for columns, no spaces will be added between "
730 "columns '.' is reserved."),
731 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
732 "Look for files with symbols relative to this directory"),
733 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
734 OPT_END()
735};
736
737static double baseline_percent(struct hist_entry *he)
738{
739 struct hists *hists = he->hists;
740 return 100.0 * he->stat.period / hists->stats.total_period;
741}
742
743static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
744 struct perf_hpp *hpp, struct hist_entry *he)
745{
746 struct diff_hpp_fmt *dfmt =
747 container_of(fmt, struct diff_hpp_fmt, fmt);
748 double percent = baseline_percent(he);
749 char pfmt[20] = " ";
750
751 if (!he->dummy) {
752 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
753 return percent_color_snprintf(hpp->buf, hpp->size,
754 pfmt, percent);
755 } else
756 return scnprintf(hpp->buf, hpp->size, "%*s",
757 dfmt->header_width, pfmt);
758}
759
760static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
761{
762 double percent = baseline_percent(he);
763 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
764 int ret = 0;
765
766 if (!he->dummy)
767 ret = scnprintf(buf, size, fmt, percent);
768
769 return ret;
770}
771
772static void
773hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
774{
775 switch (idx) {
776 case PERF_HPP_DIFF__PERIOD_BASELINE:
777 scnprintf(buf, size, "%" PRIu64, he->stat.period);
778 break;
779
780 default:
781 break;
782 }
783}
784
785static void
786hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
787 int idx, char *buf, size_t size)
788{
789 double diff;
790 double ratio;
791 s64 wdiff;
792
793 switch (idx) {
794 case PERF_HPP_DIFF__DELTA:
795 if (pair->diff.computed)
796 diff = pair->diff.period_ratio_delta;
797 else
798 diff = compute_delta(he, pair);
799
800 if (fabs(diff) >= 0.01)
801 scnprintf(buf, size, "%+4.2F%%", diff);
802 break;
803
804 case PERF_HPP_DIFF__RATIO:
805 /* No point for ratio number if we are dummy.. */
806 if (he->dummy)
807 break;
808
809 if (pair->diff.computed)
810 ratio = pair->diff.period_ratio;
811 else
812 ratio = compute_ratio(he, pair);
813
814 if (ratio > 0.0)
815 scnprintf(buf, size, "%14.6F", ratio);
816 break;
817
818 case PERF_HPP_DIFF__WEIGHTED_DIFF:
819 /* No point for wdiff number if we are dummy.. */
820 if (he->dummy)
821 break;
822
823 if (pair->diff.computed)
824 wdiff = pair->diff.wdiff;
825 else
826 wdiff = compute_wdiff(he, pair);
827
828 if (wdiff != 0)
829 scnprintf(buf, size, "%14ld", wdiff);
830 break;
831
832 case PERF_HPP_DIFF__FORMULA:
833 formula_fprintf(he, pair, buf, size);
834 break;
835
836 case PERF_HPP_DIFF__PERIOD:
837 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
838 break;
839
840 default:
841 BUG_ON(1);
842 };
843}
844
845static void
846__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
847 char *buf, size_t size)
848{
849 struct hist_entry *pair = get_pair_fmt(he, dfmt);
850 int idx = dfmt->idx;
851
852 /* baseline is special */
853 if (idx == PERF_HPP_DIFF__BASELINE)
854 hpp__entry_baseline(he, buf, size);
855 else {
856 if (pair)
857 hpp__entry_pair(he, pair, idx, buf, size);
858 else
859 hpp__entry_unpair(he, idx, buf, size);
860 }
861}
862
863static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
864 struct hist_entry *he)
865{
866 struct diff_hpp_fmt *dfmt =
867 container_of(_fmt, struct diff_hpp_fmt, fmt);
868 char buf[MAX_COL_WIDTH] = " ";
869
870 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
871
872 if (symbol_conf.field_sep)
873 return scnprintf(hpp->buf, hpp->size, "%s", buf);
874 else
875 return scnprintf(hpp->buf, hpp->size, "%*s",
876 dfmt->header_width, buf);
877}
878
879static int hpp__header(struct perf_hpp_fmt *fmt,
880 struct perf_hpp *hpp)
881{
882 struct diff_hpp_fmt *dfmt =
883 container_of(fmt, struct diff_hpp_fmt, fmt);
884
885 BUG_ON(!dfmt->header);
886 return scnprintf(hpp->buf, hpp->size, dfmt->header);
887}
888
889static int hpp__width(struct perf_hpp_fmt *fmt,
890 struct perf_hpp *hpp __maybe_unused)
891{
892 struct diff_hpp_fmt *dfmt =
893 container_of(fmt, struct diff_hpp_fmt, fmt);
894
895 BUG_ON(dfmt->header_width <= 0);
896 return dfmt->header_width;
897}
898
899static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
900{
901#define MAX_HEADER_NAME 100
902 char buf_indent[MAX_HEADER_NAME];
903 char buf[MAX_HEADER_NAME];
904 const char *header = NULL;
905 int width = 0;
906
907 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
908 header = columns[dfmt->idx].name;
909 width = columns[dfmt->idx].width;
910
911 /* Only our defined HPP fmts should appear here. */
912 BUG_ON(!header);
913
914 if (data__files_cnt > 2)
915 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
916
917#define NAME (data__files_cnt > 2 ? buf : header)
918 dfmt->header_width = width;
919 width = (int) strlen(NAME);
920 if (dfmt->header_width < width)
921 dfmt->header_width = width;
922
923 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
924 dfmt->header_width, NAME);
925
926 dfmt->header = strdup(buf_indent);
927#undef MAX_HEADER_NAME
928#undef NAME
929}
930
931static void data__hpp_register(struct data__file *d, int idx)
932{
933 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
934 struct perf_hpp_fmt *fmt = &dfmt->fmt;
935
936 dfmt->idx = idx;
937
938 fmt->header = hpp__header;
939 fmt->width = hpp__width;
940 fmt->entry = hpp__entry_global;
941
942 /* TODO more colors */
943 if (idx == PERF_HPP_DIFF__BASELINE)
944 fmt->color = hpp__color_baseline;
945
946 init_header(d, dfmt);
947 perf_hpp__column_register(fmt);
948}
949
950static void ui_init(void)
951{
952 struct data__file *d;
953 int i;
954
955 data__for_each_file(i, d) {
956
957 /*
958 * Baseline or compute realted columns:
959 *
960 * PERF_HPP_DIFF__BASELINE
961 * PERF_HPP_DIFF__DELTA
962 * PERF_HPP_DIFF__RATIO
963 * PERF_HPP_DIFF__WEIGHTED_DIFF
964 */
965 data__hpp_register(d, i ? compute_2_hpp[compute] :
966 PERF_HPP_DIFF__BASELINE);
967
968 /*
969 * And the rest:
970 *
971 * PERF_HPP_DIFF__FORMULA
972 * PERF_HPP_DIFF__PERIOD
973 * PERF_HPP_DIFF__PERIOD_BASELINE
974 */
975 if (show_formula && i)
976 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
977
978 if (show_period)
979 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
980 PERF_HPP_DIFF__PERIOD_BASELINE);
981 }
982}
983
984static int data_init(int argc, const char **argv)
985{
986 struct data__file *d;
987 static const char *defaults[] = {
988 "perf.data.old",
989 "perf.data",
990 };
991 bool use_default = true;
992 int i;
993
994 data__files_cnt = 2;
995
996 if (argc) {
997 if (argc == 1)
998 defaults[1] = argv[0];
999 else {
1000 data__files_cnt = argc;
1001 use_default = false;
1002 }
1003 } else if (symbol_conf.default_guest_vmlinux_name ||
1004 symbol_conf.default_guest_kallsyms) {
1005 defaults[0] = "perf.data.host";
1006 defaults[1] = "perf.data.guest";
1007 }
1008
1009 if (sort_compute >= (unsigned int) data__files_cnt) {
1010 pr_err("Order option out of limit.\n");
1011 return -EINVAL;
1012 }
1013
1014 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1015 if (!data__files)
1016 return -ENOMEM;
1017
1018 data__for_each_file(i, d) {
1019 struct perf_data_file *file = &d->file;
1020
1021 file->path = use_default ? defaults[i] : argv[i];
1022 file->mode = PERF_DATA_MODE_READ,
1023 file->force = force,
1024
1025 d->idx = i;
1026 }
1027
1028 return 0;
1029}
1030
1031int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1032{
1033 sort_order = diff__default_sort_order;
1034 argc = parse_options(argc, argv, options, diff_usage, 0);
1035
1036 if (symbol__init() < 0)
1037 return -1;
1038
1039 if (data_init(argc, argv) < 0)
1040 return -1;
1041
1042 ui_init();
1043
1044 if (setup_sorting() < 0)
1045 usage_with_options(diff_usage, options);
1046
1047 setup_pager();
1048
1049 sort__setup_elide(NULL);
1050
1051 return __cmd_diff();
1052}