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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 <linux/err.h>
27#include <linux/zalloc.h>
28#include <subcmd/pager.h>
29#include <subcmd/parse-options.h>
30
31#include <errno.h>
32#include <inttypes.h>
33#include <stdlib.h>
34#include <math.h>
35
36struct perf_diff {
37 struct perf_tool tool;
38 const char *time_str;
39 struct perf_time_interval *ptime_range;
40 int range_size;
41 int range_num;
42 bool has_br_stack;
43};
44
45/* Diff command specific HPP columns. */
46enum {
47 PERF_HPP_DIFF__BASELINE,
48 PERF_HPP_DIFF__PERIOD,
49 PERF_HPP_DIFF__PERIOD_BASELINE,
50 PERF_HPP_DIFF__DELTA,
51 PERF_HPP_DIFF__RATIO,
52 PERF_HPP_DIFF__WEIGHTED_DIFF,
53 PERF_HPP_DIFF__FORMULA,
54 PERF_HPP_DIFF__DELTA_ABS,
55 PERF_HPP_DIFF__CYCLES,
56
57 PERF_HPP_DIFF__MAX_INDEX
58};
59
60struct diff_hpp_fmt {
61 struct perf_hpp_fmt fmt;
62 int idx;
63 char *header;
64 int header_width;
65};
66
67struct data__file {
68 struct perf_session *session;
69 struct perf_data data;
70 int idx;
71 struct hists *hists;
72 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
73};
74
75static struct data__file *data__files;
76static int data__files_cnt;
77
78#define data__for_each_file_start(i, d, s) \
79 for (i = s, d = &data__files[s]; \
80 i < data__files_cnt; \
81 i++, d = &data__files[i])
82
83#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
84#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
85
86static bool force;
87static bool show_period;
88static bool show_formula;
89static bool show_baseline_only;
90static unsigned int sort_compute = 1;
91
92static s64 compute_wdiff_w1;
93static s64 compute_wdiff_w2;
94
95static const char *cpu_list;
96static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
97
98static struct addr_location dummy_al;
99
100enum {
101 COMPUTE_DELTA,
102 COMPUTE_RATIO,
103 COMPUTE_WEIGHTED_DIFF,
104 COMPUTE_DELTA_ABS,
105 COMPUTE_CYCLES,
106 COMPUTE_MAX,
107};
108
109const char *compute_names[COMPUTE_MAX] = {
110 [COMPUTE_DELTA] = "delta",
111 [COMPUTE_DELTA_ABS] = "delta-abs",
112 [COMPUTE_RATIO] = "ratio",
113 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
114 [COMPUTE_CYCLES] = "cycles",
115};
116
117static int compute = COMPUTE_DELTA_ABS;
118
119static int compute_2_hpp[COMPUTE_MAX] = {
120 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
121 [COMPUTE_DELTA_ABS] = PERF_HPP_DIFF__DELTA_ABS,
122 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
123 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
124 [COMPUTE_CYCLES] = PERF_HPP_DIFF__CYCLES,
125};
126
127#define MAX_COL_WIDTH 70
128
129static struct header_column {
130 const char *name;
131 int width;
132} columns[PERF_HPP_DIFF__MAX_INDEX] = {
133 [PERF_HPP_DIFF__BASELINE] = {
134 .name = "Baseline",
135 },
136 [PERF_HPP_DIFF__PERIOD] = {
137 .name = "Period",
138 .width = 14,
139 },
140 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
141 .name = "Base period",
142 .width = 14,
143 },
144 [PERF_HPP_DIFF__DELTA] = {
145 .name = "Delta",
146 .width = 7,
147 },
148 [PERF_HPP_DIFF__DELTA_ABS] = {
149 .name = "Delta Abs",
150 .width = 7,
151 },
152 [PERF_HPP_DIFF__RATIO] = {
153 .name = "Ratio",
154 .width = 14,
155 },
156 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
157 .name = "Weighted diff",
158 .width = 14,
159 },
160 [PERF_HPP_DIFF__FORMULA] = {
161 .name = "Formula",
162 .width = MAX_COL_WIDTH,
163 },
164 [PERF_HPP_DIFF__CYCLES] = {
165 .name = "[Program Block Range] Cycles Diff",
166 .width = 70,
167 }
168};
169
170static int setup_compute_opt_wdiff(char *opt)
171{
172 char *w1_str = opt;
173 char *w2_str;
174
175 int ret = -EINVAL;
176
177 if (!opt)
178 goto out;
179
180 w2_str = strchr(opt, ',');
181 if (!w2_str)
182 goto out;
183
184 *w2_str++ = 0x0;
185 if (!*w2_str)
186 goto out;
187
188 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
189 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
190
191 if (!compute_wdiff_w1 || !compute_wdiff_w2)
192 goto out;
193
194 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
195 compute_wdiff_w1, compute_wdiff_w2);
196
197 ret = 0;
198
199 out:
200 if (ret)
201 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
202
203 return ret;
204}
205
206static int setup_compute_opt(char *opt)
207{
208 if (compute == COMPUTE_WEIGHTED_DIFF)
209 return setup_compute_opt_wdiff(opt);
210
211 if (opt) {
212 pr_err("Failed: extra option specified '%s'", opt);
213 return -EINVAL;
214 }
215
216 return 0;
217}
218
219static int setup_compute(const struct option *opt, const char *str,
220 int unset __maybe_unused)
221{
222 int *cp = (int *) opt->value;
223 char *cstr = (char *) str;
224 char buf[50];
225 unsigned i;
226 char *option;
227
228 if (!str) {
229 *cp = COMPUTE_DELTA;
230 return 0;
231 }
232
233 option = strchr(str, ':');
234 if (option) {
235 unsigned len = option++ - str;
236
237 /*
238 * The str data are not writeable, so we need
239 * to use another buffer.
240 */
241
242 /* No option value is longer. */
243 if (len >= sizeof(buf))
244 return -EINVAL;
245
246 strncpy(buf, str, len);
247 buf[len] = 0x0;
248 cstr = buf;
249 }
250
251 for (i = 0; i < COMPUTE_MAX; i++)
252 if (!strcmp(cstr, compute_names[i])) {
253 *cp = i;
254 return setup_compute_opt(option);
255 }
256
257 pr_err("Failed: '%s' is not computation method "
258 "(use 'delta','ratio' or 'wdiff')\n", str);
259 return -EINVAL;
260}
261
262static double period_percent(struct hist_entry *he, u64 period)
263{
264 u64 total = hists__total_period(he->hists);
265
266 return (period * 100.0) / total;
267}
268
269static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
270{
271 double old_percent = period_percent(he, he->stat.period);
272 double new_percent = period_percent(pair, pair->stat.period);
273
274 pair->diff.period_ratio_delta = new_percent - old_percent;
275 pair->diff.computed = true;
276 return pair->diff.period_ratio_delta;
277}
278
279static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
280{
281 double old_period = he->stat.period ?: 1;
282 double new_period = pair->stat.period;
283
284 pair->diff.computed = true;
285 pair->diff.period_ratio = new_period / old_period;
286 return pair->diff.period_ratio;
287}
288
289static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
290{
291 u64 old_period = he->stat.period;
292 u64 new_period = pair->stat.period;
293
294 pair->diff.computed = true;
295 pair->diff.wdiff = new_period * compute_wdiff_w2 -
296 old_period * compute_wdiff_w1;
297
298 return pair->diff.wdiff;
299}
300
301static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
302 char *buf, size_t size)
303{
304 u64 he_total = he->hists->stats.total_period;
305 u64 pair_total = pair->hists->stats.total_period;
306
307 if (symbol_conf.filter_relative) {
308 he_total = he->hists->stats.total_non_filtered_period;
309 pair_total = pair->hists->stats.total_non_filtered_period;
310 }
311 return scnprintf(buf, size,
312 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
313 "(%" PRIu64 " * 100 / %" PRIu64 ")",
314 pair->stat.period, pair_total,
315 he->stat.period, he_total);
316}
317
318static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
319 char *buf, size_t size)
320{
321 double old_period = he->stat.period;
322 double new_period = pair->stat.period;
323
324 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
325}
326
327static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
328 char *buf, size_t size)
329{
330 u64 old_period = he->stat.period;
331 u64 new_period = pair->stat.period;
332
333 return scnprintf(buf, size,
334 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
335 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
336}
337
338static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
339 char *buf, size_t size)
340{
341 switch (compute) {
342 case COMPUTE_DELTA:
343 case COMPUTE_DELTA_ABS:
344 return formula_delta(he, pair, buf, size);
345 case COMPUTE_RATIO:
346 return formula_ratio(he, pair, buf, size);
347 case COMPUTE_WEIGHTED_DIFF:
348 return formula_wdiff(he, pair, buf, size);
349 default:
350 BUG_ON(1);
351 }
352
353 return -1;
354}
355
356static void *block_hist_zalloc(size_t size)
357{
358 struct block_hist *bh;
359
360 bh = zalloc(size + sizeof(*bh));
361 if (!bh)
362 return NULL;
363
364 return &bh->he;
365}
366
367static void block_hist_free(void *he)
368{
369 struct block_hist *bh;
370
371 bh = container_of(he, struct block_hist, he);
372 hists__delete_entries(&bh->block_hists);
373 free(bh);
374}
375
376struct hist_entry_ops block_hist_ops = {
377 .new = block_hist_zalloc,
378 .free = block_hist_free,
379};
380
381static int diff__process_sample_event(struct perf_tool *tool,
382 union perf_event *event,
383 struct perf_sample *sample,
384 struct evsel *evsel,
385 struct machine *machine)
386{
387 struct perf_diff *pdiff = container_of(tool, struct perf_diff, tool);
388 struct addr_location al;
389 struct hists *hists = evsel__hists(evsel);
390 int ret = -1;
391
392 if (perf_time__ranges_skip_sample(pdiff->ptime_range, pdiff->range_num,
393 sample->time)) {
394 return 0;
395 }
396
397 if (machine__resolve(machine, &al, sample) < 0) {
398 pr_warning("problem processing %d event, skipping it.\n",
399 event->header.type);
400 return -1;
401 }
402
403 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) {
404 ret = 0;
405 goto out_put;
406 }
407
408 if (compute != COMPUTE_CYCLES) {
409 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample,
410 true)) {
411 pr_warning("problem incrementing symbol period, "
412 "skipping event\n");
413 goto out_put;
414 }
415 } else {
416 if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
417 NULL, NULL, sample, true)) {
418 pr_warning("problem incrementing symbol period, "
419 "skipping event\n");
420 goto out_put;
421 }
422
423 hist__account_cycles(sample->branch_stack, &al, sample, false);
424 }
425
426 /*
427 * The total_period is updated here before going to the output
428 * tree since normally only the baseline hists will call
429 * hists__output_resort() and precompute needs the total
430 * period in order to sort entries by percentage delta.
431 */
432 hists->stats.total_period += sample->period;
433 if (!al.filtered)
434 hists->stats.total_non_filtered_period += sample->period;
435 ret = 0;
436out_put:
437 addr_location__put(&al);
438 return ret;
439}
440
441static struct perf_diff pdiff = {
442 .tool = {
443 .sample = diff__process_sample_event,
444 .mmap = perf_event__process_mmap,
445 .mmap2 = perf_event__process_mmap2,
446 .comm = perf_event__process_comm,
447 .exit = perf_event__process_exit,
448 .fork = perf_event__process_fork,
449 .lost = perf_event__process_lost,
450 .namespaces = perf_event__process_namespaces,
451 .ordered_events = true,
452 .ordering_requires_timestamps = true,
453 },
454};
455
456static struct evsel *evsel_match(struct evsel *evsel,
457 struct evlist *evlist)
458{
459 struct evsel *e;
460
461 evlist__for_each_entry(evlist, e) {
462 if (perf_evsel__match2(evsel, e))
463 return e;
464 }
465
466 return NULL;
467}
468
469static void perf_evlist__collapse_resort(struct evlist *evlist)
470{
471 struct evsel *evsel;
472
473 evlist__for_each_entry(evlist, evsel) {
474 struct hists *hists = evsel__hists(evsel);
475
476 hists__collapse_resort(hists, NULL);
477 }
478}
479
480static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
481{
482 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
483 void *ptr = dfmt - dfmt->idx;
484 struct data__file *d = container_of(ptr, struct data__file, fmt);
485
486 return d;
487}
488
489static struct hist_entry*
490get_pair_data(struct hist_entry *he, struct data__file *d)
491{
492 if (hist_entry__has_pairs(he)) {
493 struct hist_entry *pair;
494
495 list_for_each_entry(pair, &he->pairs.head, pairs.node)
496 if (pair->hists == d->hists)
497 return pair;
498 }
499
500 return NULL;
501}
502
503static struct hist_entry*
504get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
505{
506 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
507
508 return get_pair_data(he, d);
509}
510
511static void hists__baseline_only(struct hists *hists)
512{
513 struct rb_root_cached *root;
514 struct rb_node *next;
515
516 if (hists__has(hists, need_collapse))
517 root = &hists->entries_collapsed;
518 else
519 root = hists->entries_in;
520
521 next = rb_first_cached(root);
522 while (next != NULL) {
523 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
524
525 next = rb_next(&he->rb_node_in);
526 if (!hist_entry__next_pair(he)) {
527 rb_erase_cached(&he->rb_node_in, root);
528 hist_entry__delete(he);
529 }
530 }
531}
532
533static int64_t block_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
534 struct hist_entry *left, struct hist_entry *right)
535{
536 struct block_info *bi_l = left->block_info;
537 struct block_info *bi_r = right->block_info;
538 int cmp;
539
540 if (!bi_l->sym || !bi_r->sym) {
541 if (!bi_l->sym && !bi_r->sym)
542 return 0;
543 else if (!bi_l->sym)
544 return -1;
545 else
546 return 1;
547 }
548
549 if (bi_l->sym == bi_r->sym) {
550 if (bi_l->start == bi_r->start) {
551 if (bi_l->end == bi_r->end)
552 return 0;
553 else
554 return (int64_t)(bi_r->end - bi_l->end);
555 } else
556 return (int64_t)(bi_r->start - bi_l->start);
557 } else {
558 cmp = strcmp(bi_l->sym->name, bi_r->sym->name);
559 return cmp;
560 }
561
562 if (bi_l->sym->start != bi_r->sym->start)
563 return (int64_t)(bi_r->sym->start - bi_l->sym->start);
564
565 return (int64_t)(bi_r->sym->end - bi_l->sym->end);
566}
567
568static int64_t block_cycles_diff_cmp(struct hist_entry *left,
569 struct hist_entry *right)
570{
571 bool pairs_left = hist_entry__has_pairs(left);
572 bool pairs_right = hist_entry__has_pairs(right);
573 s64 l, r;
574
575 if (!pairs_left && !pairs_right)
576 return 0;
577
578 l = labs(left->diff.cycles);
579 r = labs(right->diff.cycles);
580 return r - l;
581}
582
583static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused,
584 struct hist_entry *left, struct hist_entry *right)
585{
586 return block_cycles_diff_cmp(right, left);
587}
588
589static void init_block_hist(struct block_hist *bh)
590{
591 __hists__init(&bh->block_hists, &bh->block_list);
592 perf_hpp_list__init(&bh->block_list);
593
594 INIT_LIST_HEAD(&bh->block_fmt.list);
595 INIT_LIST_HEAD(&bh->block_fmt.sort_list);
596 bh->block_fmt.cmp = block_cmp;
597 bh->block_fmt.sort = block_sort;
598 perf_hpp_list__register_sort_field(&bh->block_list,
599 &bh->block_fmt);
600 bh->valid = true;
601}
602
603static void init_block_info(struct block_info *bi, struct symbol *sym,
604 struct cyc_hist *ch, int offset)
605{
606 bi->sym = sym;
607 bi->start = ch->start;
608 bi->end = offset;
609 bi->cycles = ch->cycles;
610 bi->cycles_aggr = ch->cycles_aggr;
611 bi->num = ch->num;
612 bi->num_aggr = ch->num_aggr;
613}
614
615static int process_block_per_sym(struct hist_entry *he)
616{
617 struct annotation *notes;
618 struct cyc_hist *ch;
619 struct block_hist *bh;
620
621 if (!he->ms.map || !he->ms.sym)
622 return 0;
623
624 notes = symbol__annotation(he->ms.sym);
625 if (!notes || !notes->src || !notes->src->cycles_hist)
626 return 0;
627
628 bh = container_of(he, struct block_hist, he);
629 init_block_hist(bh);
630
631 ch = notes->src->cycles_hist;
632 for (unsigned int i = 0; i < symbol__size(he->ms.sym); i++) {
633 if (ch[i].num_aggr) {
634 struct block_info *bi;
635 struct hist_entry *he_block;
636
637 bi = block_info__new();
638 if (!bi)
639 return -1;
640
641 init_block_info(bi, he->ms.sym, &ch[i], i);
642 he_block = hists__add_entry_block(&bh->block_hists,
643 &dummy_al, bi);
644 if (!he_block) {
645 block_info__put(bi);
646 return -1;
647 }
648 }
649 }
650
651 return 0;
652}
653
654static int block_pair_cmp(struct hist_entry *a, struct hist_entry *b)
655{
656 struct block_info *bi_a = a->block_info;
657 struct block_info *bi_b = b->block_info;
658 int cmp;
659
660 if (!bi_a->sym || !bi_b->sym)
661 return -1;
662
663 cmp = strcmp(bi_a->sym->name, bi_b->sym->name);
664
665 if ((!cmp) && (bi_a->start == bi_b->start) && (bi_a->end == bi_b->end))
666 return 0;
667
668 return -1;
669}
670
671static struct hist_entry *get_block_pair(struct hist_entry *he,
672 struct hists *hists_pair)
673{
674 struct rb_root_cached *root = hists_pair->entries_in;
675 struct rb_node *next = rb_first_cached(root);
676 int cmp;
677
678 while (next != NULL) {
679 struct hist_entry *he_pair = rb_entry(next, struct hist_entry,
680 rb_node_in);
681
682 next = rb_next(&he_pair->rb_node_in);
683
684 cmp = block_pair_cmp(he_pair, he);
685 if (!cmp)
686 return he_pair;
687 }
688
689 return NULL;
690}
691
692static void compute_cycles_diff(struct hist_entry *he,
693 struct hist_entry *pair)
694{
695 pair->diff.computed = true;
696 if (pair->block_info->num && he->block_info->num) {
697 pair->diff.cycles =
698 pair->block_info->cycles_aggr / pair->block_info->num_aggr -
699 he->block_info->cycles_aggr / he->block_info->num_aggr;
700 }
701}
702
703static void block_hists_match(struct hists *hists_base,
704 struct hists *hists_pair)
705{
706 struct rb_root_cached *root = hists_base->entries_in;
707 struct rb_node *next = rb_first_cached(root);
708
709 while (next != NULL) {
710 struct hist_entry *he = rb_entry(next, struct hist_entry,
711 rb_node_in);
712 struct hist_entry *pair = get_block_pair(he, hists_pair);
713
714 next = rb_next(&he->rb_node_in);
715
716 if (pair) {
717 hist_entry__add_pair(pair, he);
718 compute_cycles_diff(he, pair);
719 }
720 }
721}
722
723static int filter_cb(struct hist_entry *he, void *arg __maybe_unused)
724{
725 /* Skip the calculation of column length in output_resort */
726 he->filtered = true;
727 return 0;
728}
729
730static void hists__precompute(struct hists *hists)
731{
732 struct rb_root_cached *root;
733 struct rb_node *next;
734
735 if (hists__has(hists, need_collapse))
736 root = &hists->entries_collapsed;
737 else
738 root = hists->entries_in;
739
740 next = rb_first_cached(root);
741 while (next != NULL) {
742 struct block_hist *bh, *pair_bh;
743 struct hist_entry *he, *pair;
744 struct data__file *d;
745 int i;
746
747 he = rb_entry(next, struct hist_entry, rb_node_in);
748 next = rb_next(&he->rb_node_in);
749
750 if (compute == COMPUTE_CYCLES)
751 process_block_per_sym(he);
752
753 data__for_each_file_new(i, d) {
754 pair = get_pair_data(he, d);
755 if (!pair)
756 continue;
757
758 switch (compute) {
759 case COMPUTE_DELTA:
760 case COMPUTE_DELTA_ABS:
761 compute_delta(he, pair);
762 break;
763 case COMPUTE_RATIO:
764 compute_ratio(he, pair);
765 break;
766 case COMPUTE_WEIGHTED_DIFF:
767 compute_wdiff(he, pair);
768 break;
769 case COMPUTE_CYCLES:
770 process_block_per_sym(pair);
771 bh = container_of(he, struct block_hist, he);
772 pair_bh = container_of(pair, struct block_hist,
773 he);
774
775 if (bh->valid && pair_bh->valid) {
776 block_hists_match(&bh->block_hists,
777 &pair_bh->block_hists);
778 hists__output_resort_cb(&pair_bh->block_hists,
779 NULL, filter_cb);
780 }
781 break;
782 default:
783 BUG_ON(1);
784 }
785 }
786 }
787}
788
789static int64_t cmp_doubles(double l, double r)
790{
791 if (l > r)
792 return -1;
793 else if (l < r)
794 return 1;
795 else
796 return 0;
797}
798
799static int64_t
800__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
801 int c)
802{
803 switch (c) {
804 case COMPUTE_DELTA:
805 {
806 double l = left->diff.period_ratio_delta;
807 double r = right->diff.period_ratio_delta;
808
809 return cmp_doubles(l, r);
810 }
811 case COMPUTE_DELTA_ABS:
812 {
813 double l = fabs(left->diff.period_ratio_delta);
814 double r = fabs(right->diff.period_ratio_delta);
815
816 return cmp_doubles(l, r);
817 }
818 case COMPUTE_RATIO:
819 {
820 double l = left->diff.period_ratio;
821 double r = right->diff.period_ratio;
822
823 return cmp_doubles(l, r);
824 }
825 case COMPUTE_WEIGHTED_DIFF:
826 {
827 s64 l = left->diff.wdiff;
828 s64 r = right->diff.wdiff;
829
830 return r - l;
831 }
832 default:
833 BUG_ON(1);
834 }
835
836 return 0;
837}
838
839static int64_t
840hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
841 int c, int sort_idx)
842{
843 bool pairs_left = hist_entry__has_pairs(left);
844 bool pairs_right = hist_entry__has_pairs(right);
845 struct hist_entry *p_right, *p_left;
846
847 if (!pairs_left && !pairs_right)
848 return 0;
849
850 if (!pairs_left || !pairs_right)
851 return pairs_left ? -1 : 1;
852
853 p_left = get_pair_data(left, &data__files[sort_idx]);
854 p_right = get_pair_data(right, &data__files[sort_idx]);
855
856 if (!p_left && !p_right)
857 return 0;
858
859 if (!p_left || !p_right)
860 return p_left ? -1 : 1;
861
862 /*
863 * We have 2 entries of same kind, let's
864 * make the data comparison.
865 */
866 return __hist_entry__cmp_compute(p_left, p_right, c);
867}
868
869static int64_t
870hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
871 int c, int sort_idx)
872{
873 struct hist_entry *p_right, *p_left;
874
875 p_left = get_pair_data(left, &data__files[sort_idx]);
876 p_right = get_pair_data(right, &data__files[sort_idx]);
877
878 if (!p_left && !p_right)
879 return 0;
880
881 if (!p_left || !p_right)
882 return p_left ? -1 : 1;
883
884 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
885 /*
886 * The delta can be computed without the baseline, but
887 * others are not. Put those entries which have no
888 * values below.
889 */
890 if (left->dummy && right->dummy)
891 return 0;
892
893 if (left->dummy || right->dummy)
894 return left->dummy ? 1 : -1;
895 }
896
897 return __hist_entry__cmp_compute(p_left, p_right, c);
898}
899
900static int64_t
901hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
902 struct hist_entry *left __maybe_unused,
903 struct hist_entry *right __maybe_unused)
904{
905 return 0;
906}
907
908static int64_t
909hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
910 struct hist_entry *left, struct hist_entry *right)
911{
912 if (left->stat.period == right->stat.period)
913 return 0;
914 return left->stat.period > right->stat.period ? 1 : -1;
915}
916
917static int64_t
918hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
919 struct hist_entry *left, struct hist_entry *right)
920{
921 struct data__file *d = fmt_to_data_file(fmt);
922
923 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
924}
925
926static int64_t
927hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
928 struct hist_entry *left, struct hist_entry *right)
929{
930 struct data__file *d = fmt_to_data_file(fmt);
931
932 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
933}
934
935static int64_t
936hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
937 struct hist_entry *left, struct hist_entry *right)
938{
939 struct data__file *d = fmt_to_data_file(fmt);
940
941 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
942}
943
944static int64_t
945hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
946 struct hist_entry *left, struct hist_entry *right)
947{
948 struct data__file *d = fmt_to_data_file(fmt);
949
950 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
951}
952
953static int64_t
954hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
955 struct hist_entry *left, struct hist_entry *right)
956{
957 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
958 sort_compute);
959}
960
961static int64_t
962hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
963 struct hist_entry *left, struct hist_entry *right)
964{
965 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
966 sort_compute);
967}
968
969static int64_t
970hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
971 struct hist_entry *left, struct hist_entry *right)
972{
973 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
974 sort_compute);
975}
976
977static int64_t
978hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
979 struct hist_entry *left, struct hist_entry *right)
980{
981 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
982 sort_compute);
983}
984
985static void hists__process(struct hists *hists)
986{
987 if (show_baseline_only)
988 hists__baseline_only(hists);
989
990 hists__precompute(hists);
991 hists__output_resort(hists, NULL);
992
993 if (compute == COMPUTE_CYCLES)
994 symbol_conf.report_block = true;
995
996 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
997 !symbol_conf.use_callchain);
998}
999
1000static void data__fprintf(void)
1001{
1002 struct data__file *d;
1003 int i;
1004
1005 fprintf(stdout, "# Data files:\n");
1006
1007 data__for_each_file(i, d)
1008 fprintf(stdout, "# [%d] %s %s\n",
1009 d->idx, d->data.path,
1010 !d->idx ? "(Baseline)" : "");
1011
1012 fprintf(stdout, "#\n");
1013}
1014
1015static void data_process(void)
1016{
1017 struct evlist *evlist_base = data__files[0].session->evlist;
1018 struct evsel *evsel_base;
1019 bool first = true;
1020
1021 evlist__for_each_entry(evlist_base, evsel_base) {
1022 struct hists *hists_base = evsel__hists(evsel_base);
1023 struct data__file *d;
1024 int i;
1025
1026 data__for_each_file_new(i, d) {
1027 struct evlist *evlist = d->session->evlist;
1028 struct evsel *evsel;
1029 struct hists *hists;
1030
1031 evsel = evsel_match(evsel_base, evlist);
1032 if (!evsel)
1033 continue;
1034
1035 hists = evsel__hists(evsel);
1036 d->hists = hists;
1037
1038 hists__match(hists_base, hists);
1039
1040 if (!show_baseline_only)
1041 hists__link(hists_base, hists);
1042 }
1043
1044 if (!quiet) {
1045 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
1046 perf_evsel__name(evsel_base));
1047 }
1048
1049 first = false;
1050
1051 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
1052 data__fprintf();
1053
1054 /* Don't sort callchain for perf diff */
1055 perf_evsel__reset_sample_bit(evsel_base, CALLCHAIN);
1056
1057 hists__process(hists_base);
1058 }
1059}
1060
1061static void data__free(struct data__file *d)
1062{
1063 int col;
1064
1065 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
1066 struct diff_hpp_fmt *fmt = &d->fmt[col];
1067
1068 zfree(&fmt->header);
1069 }
1070}
1071
1072static int abstime_str_dup(char **pstr)
1073{
1074 char *str = NULL;
1075
1076 if (pdiff.time_str && strchr(pdiff.time_str, ':')) {
1077 str = strdup(pdiff.time_str);
1078 if (!str)
1079 return -ENOMEM;
1080 }
1081
1082 *pstr = str;
1083 return 0;
1084}
1085
1086static int parse_absolute_time(struct data__file *d, char **pstr)
1087{
1088 char *p = *pstr;
1089 int ret;
1090
1091 /*
1092 * Absolute timestamp for one file has the format: a.b,c.d
1093 * For multiple files, the format is: a.b,c.d:a.b,c.d
1094 */
1095 p = strchr(*pstr, ':');
1096 if (p) {
1097 if (p == *pstr) {
1098 pr_err("Invalid time string\n");
1099 return -EINVAL;
1100 }
1101
1102 *p = 0;
1103 p++;
1104 if (*p == 0) {
1105 pr_err("Invalid time string\n");
1106 return -EINVAL;
1107 }
1108 }
1109
1110 ret = perf_time__parse_for_ranges(*pstr, d->session,
1111 &pdiff.ptime_range,
1112 &pdiff.range_size,
1113 &pdiff.range_num);
1114 if (ret < 0)
1115 return ret;
1116
1117 if (!p || *p == 0)
1118 *pstr = NULL;
1119 else
1120 *pstr = p;
1121
1122 return ret;
1123}
1124
1125static int parse_percent_time(struct data__file *d)
1126{
1127 int ret;
1128
1129 ret = perf_time__parse_for_ranges(pdiff.time_str, d->session,
1130 &pdiff.ptime_range,
1131 &pdiff.range_size,
1132 &pdiff.range_num);
1133 return ret;
1134}
1135
1136static int parse_time_str(struct data__file *d, char *abstime_ostr,
1137 char **pabstime_tmp)
1138{
1139 int ret = 0;
1140
1141 if (abstime_ostr)
1142 ret = parse_absolute_time(d, pabstime_tmp);
1143 else if (pdiff.time_str)
1144 ret = parse_percent_time(d);
1145
1146 return ret;
1147}
1148
1149static int check_file_brstack(void)
1150{
1151 struct data__file *d;
1152 bool has_br_stack;
1153 int i;
1154
1155 data__for_each_file(i, d) {
1156 d->session = perf_session__new(&d->data, false, &pdiff.tool);
1157 if (IS_ERR(d->session)) {
1158 pr_err("Failed to open %s\n", d->data.path);
1159 return PTR_ERR(d->session);
1160 }
1161
1162 has_br_stack = perf_header__has_feat(&d->session->header,
1163 HEADER_BRANCH_STACK);
1164 perf_session__delete(d->session);
1165 if (!has_br_stack)
1166 return 0;
1167 }
1168
1169 /* Set only all files having branch stacks */
1170 pdiff.has_br_stack = true;
1171 return 0;
1172}
1173
1174static int __cmd_diff(void)
1175{
1176 struct data__file *d;
1177 int ret, i;
1178 char *abstime_ostr, *abstime_tmp;
1179
1180 ret = abstime_str_dup(&abstime_ostr);
1181 if (ret)
1182 return ret;
1183
1184 abstime_tmp = abstime_ostr;
1185 ret = -EINVAL;
1186
1187 data__for_each_file(i, d) {
1188 d->session = perf_session__new(&d->data, false, &pdiff.tool);
1189 if (IS_ERR(d->session)) {
1190 ret = PTR_ERR(d->session);
1191 pr_err("Failed to open %s\n", d->data.path);
1192 goto out_delete;
1193 }
1194
1195 if (pdiff.time_str) {
1196 ret = parse_time_str(d, abstime_ostr, &abstime_tmp);
1197 if (ret < 0)
1198 goto out_delete;
1199 }
1200
1201 if (cpu_list) {
1202 ret = perf_session__cpu_bitmap(d->session, cpu_list,
1203 cpu_bitmap);
1204 if (ret < 0)
1205 goto out_delete;
1206 }
1207
1208 ret = perf_session__process_events(d->session);
1209 if (ret) {
1210 pr_err("Failed to process %s\n", d->data.path);
1211 goto out_delete;
1212 }
1213
1214 perf_evlist__collapse_resort(d->session->evlist);
1215
1216 if (pdiff.ptime_range)
1217 zfree(&pdiff.ptime_range);
1218 }
1219
1220 data_process();
1221
1222 out_delete:
1223 data__for_each_file(i, d) {
1224 perf_session__delete(d->session);
1225 data__free(d);
1226 }
1227
1228 free(data__files);
1229
1230 if (pdiff.ptime_range)
1231 zfree(&pdiff.ptime_range);
1232
1233 if (abstime_ostr)
1234 free(abstime_ostr);
1235
1236 return ret;
1237}
1238
1239static const char * const diff_usage[] = {
1240 "perf diff [<options>] [old_file] [new_file]",
1241 NULL,
1242};
1243
1244static const struct option options[] = {
1245 OPT_INCR('v', "verbose", &verbose,
1246 "be more verbose (show symbol address, etc)"),
1247 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
1248 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
1249 "Show only items with match in baseline"),
1250 OPT_CALLBACK('c', "compute", &compute,
1251 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs),cycles",
1252 "Entries differential computation selection",
1253 setup_compute),
1254 OPT_BOOLEAN('p', "period", &show_period,
1255 "Show period values."),
1256 OPT_BOOLEAN('F', "formula", &show_formula,
1257 "Show formula."),
1258 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1259 "dump raw trace in ASCII"),
1260 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
1261 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1262 "file", "kallsyms pathname"),
1263 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
1264 "load module symbols - WARNING: use only with -k and LIVE kernel"),
1265 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1266 "only consider symbols in these dsos"),
1267 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1268 "only consider symbols in these comms"),
1269 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1270 "only consider these symbols"),
1271 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1272 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1273 " Please refer the man page for the complete list."),
1274 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
1275 "separator for columns, no spaces will be added between "
1276 "columns '.' is reserved."),
1277 OPT_CALLBACK(0, "symfs", NULL, "directory",
1278 "Look for files with symbols relative to this directory",
1279 symbol__config_symfs),
1280 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
1281 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1282 "How to display percentage of filtered entries", parse_filter_percentage),
1283 OPT_STRING(0, "time", &pdiff.time_str, "str",
1284 "Time span (time percent or absolute timestamp)"),
1285 OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1286 OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
1287 "only consider symbols in these pids"),
1288 OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
1289 "only consider symbols in these tids"),
1290 OPT_END()
1291};
1292
1293static double baseline_percent(struct hist_entry *he)
1294{
1295 u64 total = hists__total_period(he->hists);
1296
1297 return 100.0 * he->stat.period / total;
1298}
1299
1300static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
1301 struct perf_hpp *hpp, struct hist_entry *he)
1302{
1303 struct diff_hpp_fmt *dfmt =
1304 container_of(fmt, struct diff_hpp_fmt, fmt);
1305 double percent = baseline_percent(he);
1306 char pfmt[20] = " ";
1307
1308 if (!he->dummy) {
1309 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
1310 return percent_color_snprintf(hpp->buf, hpp->size,
1311 pfmt, percent);
1312 } else
1313 return scnprintf(hpp->buf, hpp->size, "%*s",
1314 dfmt->header_width, pfmt);
1315}
1316
1317static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
1318{
1319 double percent = baseline_percent(he);
1320 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
1321 int ret = 0;
1322
1323 if (!he->dummy)
1324 ret = scnprintf(buf, size, fmt, percent);
1325
1326 return ret;
1327}
1328
1329static int cycles_printf(struct hist_entry *he, struct hist_entry *pair,
1330 struct perf_hpp *hpp, int width)
1331{
1332 struct block_hist *bh = container_of(he, struct block_hist, he);
1333 struct block_hist *bh_pair = container_of(pair, struct block_hist, he);
1334 struct hist_entry *block_he;
1335 struct block_info *bi;
1336 char buf[128];
1337 char *start_line, *end_line;
1338
1339 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1340 if (!block_he) {
1341 hpp->skip = true;
1342 return 0;
1343 }
1344
1345 /*
1346 * Avoid printing the warning "addr2line_init failed for ..."
1347 */
1348 symbol_conf.disable_add2line_warn = true;
1349
1350 bi = block_he->block_info;
1351
1352 start_line = map__srcline(he->ms.map, bi->sym->start + bi->start,
1353 he->ms.sym);
1354
1355 end_line = map__srcline(he->ms.map, bi->sym->start + bi->end,
1356 he->ms.sym);
1357
1358 if ((start_line != SRCLINE_UNKNOWN) && (end_line != SRCLINE_UNKNOWN)) {
1359 scnprintf(buf, sizeof(buf), "[%s -> %s] %4ld",
1360 start_line, end_line, block_he->diff.cycles);
1361 } else {
1362 scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld",
1363 bi->start, bi->end, block_he->diff.cycles);
1364 }
1365
1366 free_srcline(start_line);
1367 free_srcline(end_line);
1368
1369 return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
1370}
1371
1372static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
1373 struct perf_hpp *hpp, struct hist_entry *he,
1374 int comparison_method)
1375{
1376 struct diff_hpp_fmt *dfmt =
1377 container_of(fmt, struct diff_hpp_fmt, fmt);
1378 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1379 double diff;
1380 s64 wdiff;
1381 char pfmt[20] = " ";
1382
1383 if (!pair) {
1384 if (comparison_method == COMPUTE_CYCLES) {
1385 struct block_hist *bh;
1386
1387 bh = container_of(he, struct block_hist, he);
1388 if (bh->block_idx)
1389 hpp->skip = true;
1390 }
1391
1392 goto no_print;
1393 }
1394
1395 switch (comparison_method) {
1396 case COMPUTE_DELTA:
1397 if (pair->diff.computed)
1398 diff = pair->diff.period_ratio_delta;
1399 else
1400 diff = compute_delta(he, pair);
1401
1402 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
1403 return percent_color_snprintf(hpp->buf, hpp->size,
1404 pfmt, diff);
1405 case COMPUTE_RATIO:
1406 if (he->dummy)
1407 goto dummy_print;
1408 if (pair->diff.computed)
1409 diff = pair->diff.period_ratio;
1410 else
1411 diff = compute_ratio(he, pair);
1412
1413 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
1414 return value_color_snprintf(hpp->buf, hpp->size,
1415 pfmt, diff);
1416 case COMPUTE_WEIGHTED_DIFF:
1417 if (he->dummy)
1418 goto dummy_print;
1419 if (pair->diff.computed)
1420 wdiff = pair->diff.wdiff;
1421 else
1422 wdiff = compute_wdiff(he, pair);
1423
1424 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
1425 return color_snprintf(hpp->buf, hpp->size,
1426 get_percent_color(wdiff),
1427 pfmt, wdiff);
1428 case COMPUTE_CYCLES:
1429 return cycles_printf(he, pair, hpp, dfmt->header_width);
1430 default:
1431 BUG_ON(1);
1432 }
1433dummy_print:
1434 return scnprintf(hpp->buf, hpp->size, "%*s",
1435 dfmt->header_width, "N/A");
1436no_print:
1437 return scnprintf(hpp->buf, hpp->size, "%*s",
1438 dfmt->header_width, pfmt);
1439}
1440
1441static int hpp__color_delta(struct perf_hpp_fmt *fmt,
1442 struct perf_hpp *hpp, struct hist_entry *he)
1443{
1444 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
1445}
1446
1447static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
1448 struct perf_hpp *hpp, struct hist_entry *he)
1449{
1450 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
1451}
1452
1453static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
1454 struct perf_hpp *hpp, struct hist_entry *he)
1455{
1456 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
1457}
1458
1459static int hpp__color_cycles(struct perf_hpp_fmt *fmt,
1460 struct perf_hpp *hpp, struct hist_entry *he)
1461{
1462 return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);
1463}
1464
1465static void
1466hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
1467{
1468 switch (idx) {
1469 case PERF_HPP_DIFF__PERIOD_BASELINE:
1470 scnprintf(buf, size, "%" PRIu64, he->stat.period);
1471 break;
1472
1473 default:
1474 break;
1475 }
1476}
1477
1478static void
1479hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
1480 int idx, char *buf, size_t size)
1481{
1482 double diff;
1483 double ratio;
1484 s64 wdiff;
1485
1486 switch (idx) {
1487 case PERF_HPP_DIFF__DELTA:
1488 case PERF_HPP_DIFF__DELTA_ABS:
1489 if (pair->diff.computed)
1490 diff = pair->diff.period_ratio_delta;
1491 else
1492 diff = compute_delta(he, pair);
1493
1494 scnprintf(buf, size, "%+4.2F%%", diff);
1495 break;
1496
1497 case PERF_HPP_DIFF__RATIO:
1498 /* No point for ratio number if we are dummy.. */
1499 if (he->dummy) {
1500 scnprintf(buf, size, "N/A");
1501 break;
1502 }
1503
1504 if (pair->diff.computed)
1505 ratio = pair->diff.period_ratio;
1506 else
1507 ratio = compute_ratio(he, pair);
1508
1509 if (ratio > 0.0)
1510 scnprintf(buf, size, "%14.6F", ratio);
1511 break;
1512
1513 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1514 /* No point for wdiff number if we are dummy.. */
1515 if (he->dummy) {
1516 scnprintf(buf, size, "N/A");
1517 break;
1518 }
1519
1520 if (pair->diff.computed)
1521 wdiff = pair->diff.wdiff;
1522 else
1523 wdiff = compute_wdiff(he, pair);
1524
1525 if (wdiff != 0)
1526 scnprintf(buf, size, "%14ld", wdiff);
1527 break;
1528
1529 case PERF_HPP_DIFF__FORMULA:
1530 formula_fprintf(he, pair, buf, size);
1531 break;
1532
1533 case PERF_HPP_DIFF__PERIOD:
1534 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1535 break;
1536
1537 default:
1538 BUG_ON(1);
1539 };
1540}
1541
1542static void
1543__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1544 char *buf, size_t size)
1545{
1546 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1547 int idx = dfmt->idx;
1548
1549 /* baseline is special */
1550 if (idx == PERF_HPP_DIFF__BASELINE)
1551 hpp__entry_baseline(he, buf, size);
1552 else {
1553 if (pair)
1554 hpp__entry_pair(he, pair, idx, buf, size);
1555 else
1556 hpp__entry_unpair(he, idx, buf, size);
1557 }
1558}
1559
1560static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1561 struct hist_entry *he)
1562{
1563 struct diff_hpp_fmt *dfmt =
1564 container_of(_fmt, struct diff_hpp_fmt, fmt);
1565 char buf[MAX_COL_WIDTH] = " ";
1566
1567 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1568
1569 if (symbol_conf.field_sep)
1570 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1571 else
1572 return scnprintf(hpp->buf, hpp->size, "%*s",
1573 dfmt->header_width, buf);
1574}
1575
1576static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1577 struct hists *hists __maybe_unused,
1578 int line __maybe_unused,
1579 int *span __maybe_unused)
1580{
1581 struct diff_hpp_fmt *dfmt =
1582 container_of(fmt, struct diff_hpp_fmt, fmt);
1583
1584 BUG_ON(!dfmt->header);
1585 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1586}
1587
1588static int hpp__width(struct perf_hpp_fmt *fmt,
1589 struct perf_hpp *hpp __maybe_unused,
1590 struct hists *hists __maybe_unused)
1591{
1592 struct diff_hpp_fmt *dfmt =
1593 container_of(fmt, struct diff_hpp_fmt, fmt);
1594
1595 BUG_ON(dfmt->header_width <= 0);
1596 return dfmt->header_width;
1597}
1598
1599static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1600{
1601#define MAX_HEADER_NAME 100
1602 char buf_indent[MAX_HEADER_NAME];
1603 char buf[MAX_HEADER_NAME];
1604 const char *header = NULL;
1605 int width = 0;
1606
1607 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1608 header = columns[dfmt->idx].name;
1609 width = columns[dfmt->idx].width;
1610
1611 /* Only our defined HPP fmts should appear here. */
1612 BUG_ON(!header);
1613
1614 if (data__files_cnt > 2)
1615 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1616
1617#define NAME (data__files_cnt > 2 ? buf : header)
1618 dfmt->header_width = width;
1619 width = (int) strlen(NAME);
1620 if (dfmt->header_width < width)
1621 dfmt->header_width = width;
1622
1623 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1624 dfmt->header_width, NAME);
1625
1626 dfmt->header = strdup(buf_indent);
1627#undef MAX_HEADER_NAME
1628#undef NAME
1629}
1630
1631static void data__hpp_register(struct data__file *d, int idx)
1632{
1633 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1634 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1635
1636 dfmt->idx = idx;
1637
1638 fmt->header = hpp__header;
1639 fmt->width = hpp__width;
1640 fmt->entry = hpp__entry_global;
1641 fmt->cmp = hist_entry__cmp_nop;
1642 fmt->collapse = hist_entry__cmp_nop;
1643
1644 /* TODO more colors */
1645 switch (idx) {
1646 case PERF_HPP_DIFF__BASELINE:
1647 fmt->color = hpp__color_baseline;
1648 fmt->sort = hist_entry__cmp_baseline;
1649 break;
1650 case PERF_HPP_DIFF__DELTA:
1651 fmt->color = hpp__color_delta;
1652 fmt->sort = hist_entry__cmp_delta;
1653 break;
1654 case PERF_HPP_DIFF__RATIO:
1655 fmt->color = hpp__color_ratio;
1656 fmt->sort = hist_entry__cmp_ratio;
1657 break;
1658 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1659 fmt->color = hpp__color_wdiff;
1660 fmt->sort = hist_entry__cmp_wdiff;
1661 break;
1662 case PERF_HPP_DIFF__DELTA_ABS:
1663 fmt->color = hpp__color_delta;
1664 fmt->sort = hist_entry__cmp_delta_abs;
1665 break;
1666 case PERF_HPP_DIFF__CYCLES:
1667 fmt->color = hpp__color_cycles;
1668 fmt->sort = hist_entry__cmp_nop;
1669 break;
1670 default:
1671 fmt->sort = hist_entry__cmp_nop;
1672 break;
1673 }
1674
1675 init_header(d, dfmt);
1676 perf_hpp__column_register(fmt);
1677 perf_hpp__register_sort_field(fmt);
1678}
1679
1680static int ui_init(void)
1681{
1682 struct data__file *d;
1683 struct perf_hpp_fmt *fmt;
1684 int i;
1685
1686 data__for_each_file(i, d) {
1687
1688 /*
1689 * Baseline or compute realted columns:
1690 *
1691 * PERF_HPP_DIFF__BASELINE
1692 * PERF_HPP_DIFF__DELTA
1693 * PERF_HPP_DIFF__RATIO
1694 * PERF_HPP_DIFF__WEIGHTED_DIFF
1695 */
1696 data__hpp_register(d, i ? compute_2_hpp[compute] :
1697 PERF_HPP_DIFF__BASELINE);
1698
1699 /*
1700 * And the rest:
1701 *
1702 * PERF_HPP_DIFF__FORMULA
1703 * PERF_HPP_DIFF__PERIOD
1704 * PERF_HPP_DIFF__PERIOD_BASELINE
1705 */
1706 if (show_formula && i)
1707 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1708
1709 if (show_period)
1710 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1711 PERF_HPP_DIFF__PERIOD_BASELINE);
1712 }
1713
1714 if (!sort_compute)
1715 return 0;
1716
1717 /*
1718 * Prepend an fmt to sort on columns at 'sort_compute' first.
1719 * This fmt is added only to the sort list but not to the
1720 * output fields list.
1721 *
1722 * Note that this column (data) can be compared twice - one
1723 * for this 'sort_compute' fmt and another for the normal
1724 * diff_hpp_fmt. But it shouldn't a problem as most entries
1725 * will be sorted out by first try or baseline and comparing
1726 * is not a costly operation.
1727 */
1728 fmt = zalloc(sizeof(*fmt));
1729 if (fmt == NULL) {
1730 pr_err("Memory allocation failed\n");
1731 return -1;
1732 }
1733
1734 fmt->cmp = hist_entry__cmp_nop;
1735 fmt->collapse = hist_entry__cmp_nop;
1736
1737 switch (compute) {
1738 case COMPUTE_DELTA:
1739 fmt->sort = hist_entry__cmp_delta_idx;
1740 break;
1741 case COMPUTE_RATIO:
1742 fmt->sort = hist_entry__cmp_ratio_idx;
1743 break;
1744 case COMPUTE_WEIGHTED_DIFF:
1745 fmt->sort = hist_entry__cmp_wdiff_idx;
1746 break;
1747 case COMPUTE_DELTA_ABS:
1748 fmt->sort = hist_entry__cmp_delta_abs_idx;
1749 break;
1750 case COMPUTE_CYCLES:
1751 /*
1752 * Should set since 'fmt->sort' is called without
1753 * checking valid during sorting
1754 */
1755 fmt->sort = hist_entry__cmp_nop;
1756 break;
1757 default:
1758 BUG_ON(1);
1759 }
1760
1761 perf_hpp__prepend_sort_field(fmt);
1762 return 0;
1763}
1764
1765static int data_init(int argc, const char **argv)
1766{
1767 struct data__file *d;
1768 static const char *defaults[] = {
1769 "perf.data.old",
1770 "perf.data",
1771 };
1772 bool use_default = true;
1773 int i;
1774
1775 data__files_cnt = 2;
1776
1777 if (argc) {
1778 if (argc == 1)
1779 defaults[1] = argv[0];
1780 else {
1781 data__files_cnt = argc;
1782 use_default = false;
1783 }
1784 } else if (perf_guest) {
1785 defaults[0] = "perf.data.host";
1786 defaults[1] = "perf.data.guest";
1787 }
1788
1789 if (sort_compute >= (unsigned int) data__files_cnt) {
1790 pr_err("Order option out of limit.\n");
1791 return -EINVAL;
1792 }
1793
1794 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1795 if (!data__files)
1796 return -ENOMEM;
1797
1798 data__for_each_file(i, d) {
1799 struct perf_data *data = &d->data;
1800
1801 data->path = use_default ? defaults[i] : argv[i];
1802 data->mode = PERF_DATA_MODE_READ,
1803 data->force = force,
1804
1805 d->idx = i;
1806 }
1807
1808 return 0;
1809}
1810
1811static int diff__config(const char *var, const char *value,
1812 void *cb __maybe_unused)
1813{
1814 if (!strcmp(var, "diff.order")) {
1815 int ret;
1816 if (perf_config_int(&ret, var, value) < 0)
1817 return -1;
1818 sort_compute = ret;
1819 return 0;
1820 }
1821 if (!strcmp(var, "diff.compute")) {
1822 if (!strcmp(value, "delta")) {
1823 compute = COMPUTE_DELTA;
1824 } else if (!strcmp(value, "delta-abs")) {
1825 compute = COMPUTE_DELTA_ABS;
1826 } else if (!strcmp(value, "ratio")) {
1827 compute = COMPUTE_RATIO;
1828 } else if (!strcmp(value, "wdiff")) {
1829 compute = COMPUTE_WEIGHTED_DIFF;
1830 } else {
1831 pr_err("Invalid compute method: %s\n", value);
1832 return -1;
1833 }
1834 }
1835
1836 return 0;
1837}
1838
1839int cmd_diff(int argc, const char **argv)
1840{
1841 int ret = hists__init();
1842
1843 if (ret < 0)
1844 return ret;
1845
1846 perf_config(diff__config, NULL);
1847
1848 argc = parse_options(argc, argv, options, diff_usage, 0);
1849
1850 if (quiet)
1851 perf_quiet_option();
1852
1853 symbol__annotation_init();
1854
1855 if (symbol__init(NULL) < 0)
1856 return -1;
1857
1858 if (data_init(argc, argv) < 0)
1859 return -1;
1860
1861 if (check_file_brstack() < 0)
1862 return -1;
1863
1864 if (compute == COMPUTE_CYCLES && !pdiff.has_br_stack)
1865 return -1;
1866
1867 if (ui_init() < 0)
1868 return -1;
1869
1870 sort__mode = SORT_MODE__DIFF;
1871
1872 if (setup_sorting(NULL) < 0)
1873 usage_with_options(diff_usage, options);
1874
1875 setup_pager();
1876
1877 sort__setup_elide(NULL);
1878
1879 return __cmd_diff();
1880}
1/*
2 * builtin-diff.c
3 *
4 * Builtin diff command: Analyze two perf.data input files, look up and read
5 * DSOs and symbol information, sort them and produce a diff.
6 */
7#include "builtin.h"
8
9#include "util/debug.h"
10#include "util/event.h"
11#include "util/hist.h"
12#include "util/evsel.h"
13#include "util/evlist.h"
14#include "util/session.h"
15#include "util/tool.h"
16#include "util/sort.h"
17#include "util/symbol.h"
18#include "util/util.h"
19#include "util/data.h"
20
21#include <stdlib.h>
22#include <math.h>
23
24/* Diff command specific HPP columns. */
25enum {
26 PERF_HPP_DIFF__BASELINE,
27 PERF_HPP_DIFF__PERIOD,
28 PERF_HPP_DIFF__PERIOD_BASELINE,
29 PERF_HPP_DIFF__DELTA,
30 PERF_HPP_DIFF__RATIO,
31 PERF_HPP_DIFF__WEIGHTED_DIFF,
32 PERF_HPP_DIFF__FORMULA,
33
34 PERF_HPP_DIFF__MAX_INDEX
35};
36
37struct diff_hpp_fmt {
38 struct perf_hpp_fmt fmt;
39 int idx;
40 char *header;
41 int header_width;
42};
43
44struct data__file {
45 struct perf_session *session;
46 struct perf_data_file file;
47 int idx;
48 struct hists *hists;
49 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
50};
51
52static struct data__file *data__files;
53static int data__files_cnt;
54
55#define data__for_each_file_start(i, d, s) \
56 for (i = s, d = &data__files[s]; \
57 i < data__files_cnt; \
58 i++, d = &data__files[i])
59
60#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
61#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
62
63static bool force;
64static bool show_period;
65static bool show_formula;
66static bool show_baseline_only;
67static unsigned int sort_compute;
68
69static s64 compute_wdiff_w1;
70static s64 compute_wdiff_w2;
71
72enum {
73 COMPUTE_DELTA,
74 COMPUTE_RATIO,
75 COMPUTE_WEIGHTED_DIFF,
76 COMPUTE_MAX,
77};
78
79const char *compute_names[COMPUTE_MAX] = {
80 [COMPUTE_DELTA] = "delta",
81 [COMPUTE_RATIO] = "ratio",
82 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
83};
84
85static int compute;
86
87static int compute_2_hpp[COMPUTE_MAX] = {
88 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
89 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
90 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
91};
92
93#define MAX_COL_WIDTH 70
94
95static struct header_column {
96 const char *name;
97 int width;
98} columns[PERF_HPP_DIFF__MAX_INDEX] = {
99 [PERF_HPP_DIFF__BASELINE] = {
100 .name = "Baseline",
101 },
102 [PERF_HPP_DIFF__PERIOD] = {
103 .name = "Period",
104 .width = 14,
105 },
106 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
107 .name = "Base period",
108 .width = 14,
109 },
110 [PERF_HPP_DIFF__DELTA] = {
111 .name = "Delta",
112 .width = 7,
113 },
114 [PERF_HPP_DIFF__RATIO] = {
115 .name = "Ratio",
116 .width = 14,
117 },
118 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
119 .name = "Weighted diff",
120 .width = 14,
121 },
122 [PERF_HPP_DIFF__FORMULA] = {
123 .name = "Formula",
124 .width = MAX_COL_WIDTH,
125 }
126};
127
128static int setup_compute_opt_wdiff(char *opt)
129{
130 char *w1_str = opt;
131 char *w2_str;
132
133 int ret = -EINVAL;
134
135 if (!opt)
136 goto out;
137
138 w2_str = strchr(opt, ',');
139 if (!w2_str)
140 goto out;
141
142 *w2_str++ = 0x0;
143 if (!*w2_str)
144 goto out;
145
146 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
147 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
148
149 if (!compute_wdiff_w1 || !compute_wdiff_w2)
150 goto out;
151
152 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
153 compute_wdiff_w1, compute_wdiff_w2);
154
155 ret = 0;
156
157 out:
158 if (ret)
159 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
160
161 return ret;
162}
163
164static int setup_compute_opt(char *opt)
165{
166 if (compute == COMPUTE_WEIGHTED_DIFF)
167 return setup_compute_opt_wdiff(opt);
168
169 if (opt) {
170 pr_err("Failed: extra option specified '%s'", opt);
171 return -EINVAL;
172 }
173
174 return 0;
175}
176
177static int setup_compute(const struct option *opt, const char *str,
178 int unset __maybe_unused)
179{
180 int *cp = (int *) opt->value;
181 char *cstr = (char *) str;
182 char buf[50];
183 unsigned i;
184 char *option;
185
186 if (!str) {
187 *cp = COMPUTE_DELTA;
188 return 0;
189 }
190
191 option = strchr(str, ':');
192 if (option) {
193 unsigned len = option++ - str;
194
195 /*
196 * The str data are not writeable, so we need
197 * to use another buffer.
198 */
199
200 /* No option value is longer. */
201 if (len >= sizeof(buf))
202 return -EINVAL;
203
204 strncpy(buf, str, len);
205 buf[len] = 0x0;
206 cstr = buf;
207 }
208
209 for (i = 0; i < COMPUTE_MAX; i++)
210 if (!strcmp(cstr, compute_names[i])) {
211 *cp = i;
212 return setup_compute_opt(option);
213 }
214
215 pr_err("Failed: '%s' is not computation method "
216 "(use 'delta','ratio' or 'wdiff')\n", str);
217 return -EINVAL;
218}
219
220static double period_percent(struct hist_entry *he, u64 period)
221{
222 u64 total = hists__total_period(he->hists);
223
224 return (period * 100.0) / total;
225}
226
227static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
228{
229 double old_percent = period_percent(he, he->stat.period);
230 double new_percent = period_percent(pair, pair->stat.period);
231
232 pair->diff.period_ratio_delta = new_percent - old_percent;
233 pair->diff.computed = true;
234 return pair->diff.period_ratio_delta;
235}
236
237static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
238{
239 double old_period = he->stat.period ?: 1;
240 double new_period = pair->stat.period;
241
242 pair->diff.computed = true;
243 pair->diff.period_ratio = new_period / old_period;
244 return pair->diff.period_ratio;
245}
246
247static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
248{
249 u64 old_period = he->stat.period;
250 u64 new_period = pair->stat.period;
251
252 pair->diff.computed = true;
253 pair->diff.wdiff = new_period * compute_wdiff_w2 -
254 old_period * compute_wdiff_w1;
255
256 return pair->diff.wdiff;
257}
258
259static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
260 char *buf, size_t size)
261{
262 u64 he_total = he->hists->stats.total_period;
263 u64 pair_total = pair->hists->stats.total_period;
264
265 if (symbol_conf.filter_relative) {
266 he_total = he->hists->stats.total_non_filtered_period;
267 pair_total = pair->hists->stats.total_non_filtered_period;
268 }
269 return scnprintf(buf, size,
270 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
271 "(%" PRIu64 " * 100 / %" PRIu64 ")",
272 pair->stat.period, pair_total,
273 he->stat.period, he_total);
274}
275
276static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
277 char *buf, size_t size)
278{
279 double old_period = he->stat.period;
280 double new_period = pair->stat.period;
281
282 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
283}
284
285static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
286 char *buf, size_t size)
287{
288 u64 old_period = he->stat.period;
289 u64 new_period = pair->stat.period;
290
291 return scnprintf(buf, size,
292 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
293 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
294}
295
296static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
297 char *buf, size_t size)
298{
299 switch (compute) {
300 case COMPUTE_DELTA:
301 return formula_delta(he, pair, buf, size);
302 case COMPUTE_RATIO:
303 return formula_ratio(he, pair, buf, size);
304 case COMPUTE_WEIGHTED_DIFF:
305 return formula_wdiff(he, pair, buf, size);
306 default:
307 BUG_ON(1);
308 }
309
310 return -1;
311}
312
313static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
314 union perf_event *event,
315 struct perf_sample *sample,
316 struct perf_evsel *evsel,
317 struct machine *machine)
318{
319 struct addr_location al;
320 struct hists *hists = evsel__hists(evsel);
321 int ret = -1;
322
323 if (machine__resolve(machine, &al, sample) < 0) {
324 pr_warning("problem processing %d event, skipping it.\n",
325 event->header.type);
326 return -1;
327 }
328
329 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample, true)) {
330 pr_warning("problem incrementing symbol period, skipping event\n");
331 goto out_put;
332 }
333
334 /*
335 * The total_period is updated here before going to the output
336 * tree since normally only the baseline hists will call
337 * hists__output_resort() and precompute needs the total
338 * period in order to sort entries by percentage delta.
339 */
340 hists->stats.total_period += sample->period;
341 if (!al.filtered)
342 hists->stats.total_non_filtered_period += sample->period;
343 ret = 0;
344out_put:
345 addr_location__put(&al);
346 return ret;
347}
348
349static struct perf_tool tool = {
350 .sample = diff__process_sample_event,
351 .mmap = perf_event__process_mmap,
352 .mmap2 = perf_event__process_mmap2,
353 .comm = perf_event__process_comm,
354 .exit = perf_event__process_exit,
355 .fork = perf_event__process_fork,
356 .lost = perf_event__process_lost,
357 .ordered_events = true,
358 .ordering_requires_timestamps = true,
359};
360
361static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
362 struct perf_evlist *evlist)
363{
364 struct perf_evsel *e;
365
366 evlist__for_each_entry(evlist, e) {
367 if (perf_evsel__match2(evsel, e))
368 return e;
369 }
370
371 return NULL;
372}
373
374static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
375{
376 struct perf_evsel *evsel;
377
378 evlist__for_each_entry(evlist, evsel) {
379 struct hists *hists = evsel__hists(evsel);
380
381 hists__collapse_resort(hists, NULL);
382 }
383}
384
385static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
386{
387 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
388 void *ptr = dfmt - dfmt->idx;
389 struct data__file *d = container_of(ptr, struct data__file, fmt);
390
391 return d;
392}
393
394static struct hist_entry*
395get_pair_data(struct hist_entry *he, struct data__file *d)
396{
397 if (hist_entry__has_pairs(he)) {
398 struct hist_entry *pair;
399
400 list_for_each_entry(pair, &he->pairs.head, pairs.node)
401 if (pair->hists == d->hists)
402 return pair;
403 }
404
405 return NULL;
406}
407
408static struct hist_entry*
409get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
410{
411 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
412
413 return get_pair_data(he, d);
414}
415
416static void hists__baseline_only(struct hists *hists)
417{
418 struct rb_root *root;
419 struct rb_node *next;
420
421 if (hists__has(hists, need_collapse))
422 root = &hists->entries_collapsed;
423 else
424 root = hists->entries_in;
425
426 next = rb_first(root);
427 while (next != NULL) {
428 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
429
430 next = rb_next(&he->rb_node_in);
431 if (!hist_entry__next_pair(he)) {
432 rb_erase(&he->rb_node_in, root);
433 hist_entry__delete(he);
434 }
435 }
436}
437
438static void hists__precompute(struct hists *hists)
439{
440 struct rb_root *root;
441 struct rb_node *next;
442
443 if (hists__has(hists, need_collapse))
444 root = &hists->entries_collapsed;
445 else
446 root = hists->entries_in;
447
448 next = rb_first(root);
449 while (next != NULL) {
450 struct hist_entry *he, *pair;
451 struct data__file *d;
452 int i;
453
454 he = rb_entry(next, struct hist_entry, rb_node_in);
455 next = rb_next(&he->rb_node_in);
456
457 data__for_each_file_new(i, d) {
458 pair = get_pair_data(he, d);
459 if (!pair)
460 continue;
461
462 switch (compute) {
463 case COMPUTE_DELTA:
464 compute_delta(he, pair);
465 break;
466 case COMPUTE_RATIO:
467 compute_ratio(he, pair);
468 break;
469 case COMPUTE_WEIGHTED_DIFF:
470 compute_wdiff(he, pair);
471 break;
472 default:
473 BUG_ON(1);
474 }
475 }
476 }
477}
478
479static int64_t cmp_doubles(double l, double r)
480{
481 if (l > r)
482 return -1;
483 else if (l < r)
484 return 1;
485 else
486 return 0;
487}
488
489static int64_t
490__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
491 int c)
492{
493 switch (c) {
494 case COMPUTE_DELTA:
495 {
496 double l = left->diff.period_ratio_delta;
497 double r = right->diff.period_ratio_delta;
498
499 return cmp_doubles(l, r);
500 }
501 case COMPUTE_RATIO:
502 {
503 double l = left->diff.period_ratio;
504 double r = right->diff.period_ratio;
505
506 return cmp_doubles(l, r);
507 }
508 case COMPUTE_WEIGHTED_DIFF:
509 {
510 s64 l = left->diff.wdiff;
511 s64 r = right->diff.wdiff;
512
513 return r - l;
514 }
515 default:
516 BUG_ON(1);
517 }
518
519 return 0;
520}
521
522static int64_t
523hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
524 int c, int sort_idx)
525{
526 bool pairs_left = hist_entry__has_pairs(left);
527 bool pairs_right = hist_entry__has_pairs(right);
528 struct hist_entry *p_right, *p_left;
529
530 if (!pairs_left && !pairs_right)
531 return 0;
532
533 if (!pairs_left || !pairs_right)
534 return pairs_left ? -1 : 1;
535
536 p_left = get_pair_data(left, &data__files[sort_idx]);
537 p_right = get_pair_data(right, &data__files[sort_idx]);
538
539 if (!p_left && !p_right)
540 return 0;
541
542 if (!p_left || !p_right)
543 return p_left ? -1 : 1;
544
545 /*
546 * We have 2 entries of same kind, let's
547 * make the data comparison.
548 */
549 return __hist_entry__cmp_compute(p_left, p_right, c);
550}
551
552static int64_t
553hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
554 int c, int sort_idx)
555{
556 struct hist_entry *p_right, *p_left;
557
558 p_left = get_pair_data(left, &data__files[sort_idx]);
559 p_right = get_pair_data(right, &data__files[sort_idx]);
560
561 if (!p_left && !p_right)
562 return 0;
563
564 if (!p_left || !p_right)
565 return p_left ? -1 : 1;
566
567 if (c != COMPUTE_DELTA) {
568 /*
569 * The delta can be computed without the baseline, but
570 * others are not. Put those entries which have no
571 * values below.
572 */
573 if (left->dummy && right->dummy)
574 return 0;
575
576 if (left->dummy || right->dummy)
577 return left->dummy ? 1 : -1;
578 }
579
580 return __hist_entry__cmp_compute(p_left, p_right, c);
581}
582
583static int64_t
584hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
585 struct hist_entry *left __maybe_unused,
586 struct hist_entry *right __maybe_unused)
587{
588 return 0;
589}
590
591static int64_t
592hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
593 struct hist_entry *left, struct hist_entry *right)
594{
595 if (left->stat.period == right->stat.period)
596 return 0;
597 return left->stat.period > right->stat.period ? 1 : -1;
598}
599
600static int64_t
601hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
602 struct hist_entry *left, struct hist_entry *right)
603{
604 struct data__file *d = fmt_to_data_file(fmt);
605
606 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
607}
608
609static int64_t
610hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
611 struct hist_entry *left, struct hist_entry *right)
612{
613 struct data__file *d = fmt_to_data_file(fmt);
614
615 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
616}
617
618static int64_t
619hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
620 struct hist_entry *left, struct hist_entry *right)
621{
622 struct data__file *d = fmt_to_data_file(fmt);
623
624 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
625}
626
627static int64_t
628hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
629 struct hist_entry *left, struct hist_entry *right)
630{
631 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
632 sort_compute);
633}
634
635static int64_t
636hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
637 struct hist_entry *left, struct hist_entry *right)
638{
639 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
640 sort_compute);
641}
642
643static int64_t
644hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
645 struct hist_entry *left, struct hist_entry *right)
646{
647 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
648 sort_compute);
649}
650
651static void hists__process(struct hists *hists)
652{
653 if (show_baseline_only)
654 hists__baseline_only(hists);
655
656 hists__precompute(hists);
657 hists__output_resort(hists, NULL);
658
659 hists__fprintf(hists, true, 0, 0, 0, stdout,
660 symbol_conf.use_callchain);
661}
662
663static void data__fprintf(void)
664{
665 struct data__file *d;
666 int i;
667
668 fprintf(stdout, "# Data files:\n");
669
670 data__for_each_file(i, d)
671 fprintf(stdout, "# [%d] %s %s\n",
672 d->idx, d->file.path,
673 !d->idx ? "(Baseline)" : "");
674
675 fprintf(stdout, "#\n");
676}
677
678static void data_process(void)
679{
680 struct perf_evlist *evlist_base = data__files[0].session->evlist;
681 struct perf_evsel *evsel_base;
682 bool first = true;
683
684 evlist__for_each_entry(evlist_base, evsel_base) {
685 struct hists *hists_base = evsel__hists(evsel_base);
686 struct data__file *d;
687 int i;
688
689 data__for_each_file_new(i, d) {
690 struct perf_evlist *evlist = d->session->evlist;
691 struct perf_evsel *evsel;
692 struct hists *hists;
693
694 evsel = evsel_match(evsel_base, evlist);
695 if (!evsel)
696 continue;
697
698 hists = evsel__hists(evsel);
699 d->hists = hists;
700
701 hists__match(hists_base, hists);
702
703 if (!show_baseline_only)
704 hists__link(hists_base, hists);
705 }
706
707 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
708 perf_evsel__name(evsel_base));
709
710 first = false;
711
712 if (verbose || data__files_cnt > 2)
713 data__fprintf();
714
715 /* Don't sort callchain for perf diff */
716 perf_evsel__reset_sample_bit(evsel_base, CALLCHAIN);
717
718 hists__process(hists_base);
719 }
720}
721
722static void data__free(struct data__file *d)
723{
724 int col;
725
726 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
727 struct diff_hpp_fmt *fmt = &d->fmt[col];
728
729 zfree(&fmt->header);
730 }
731}
732
733static int __cmd_diff(void)
734{
735 struct data__file *d;
736 int ret = -EINVAL, i;
737
738 data__for_each_file(i, d) {
739 d->session = perf_session__new(&d->file, false, &tool);
740 if (!d->session) {
741 pr_err("Failed to open %s\n", d->file.path);
742 ret = -1;
743 goto out_delete;
744 }
745
746 ret = perf_session__process_events(d->session);
747 if (ret) {
748 pr_err("Failed to process %s\n", d->file.path);
749 goto out_delete;
750 }
751
752 perf_evlist__collapse_resort(d->session->evlist);
753 }
754
755 data_process();
756
757 out_delete:
758 data__for_each_file(i, d) {
759 perf_session__delete(d->session);
760 data__free(d);
761 }
762
763 free(data__files);
764 return ret;
765}
766
767static const char * const diff_usage[] = {
768 "perf diff [<options>] [old_file] [new_file]",
769 NULL,
770};
771
772static const struct option options[] = {
773 OPT_INCR('v', "verbose", &verbose,
774 "be more verbose (show symbol address, etc)"),
775 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
776 "Show only items with match in baseline"),
777 OPT_CALLBACK('c', "compute", &compute,
778 "delta,ratio,wdiff:w1,w2 (default delta)",
779 "Entries differential computation selection",
780 setup_compute),
781 OPT_BOOLEAN('p', "period", &show_period,
782 "Show period values."),
783 OPT_BOOLEAN('F', "formula", &show_formula,
784 "Show formula."),
785 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
786 "dump raw trace in ASCII"),
787 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
788 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
789 "file", "kallsyms pathname"),
790 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
791 "load module symbols - WARNING: use only with -k and LIVE kernel"),
792 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
793 "only consider symbols in these dsos"),
794 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
795 "only consider symbols in these comms"),
796 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
797 "only consider these symbols"),
798 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
799 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
800 " Please refer the man page for the complete list."),
801 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
802 "separator for columns, no spaces will be added between "
803 "columns '.' is reserved."),
804 OPT_CALLBACK(0, "symfs", NULL, "directory",
805 "Look for files with symbols relative to this directory",
806 symbol__config_symfs),
807 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
808 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
809 "How to display percentage of filtered entries", parse_filter_percentage),
810 OPT_END()
811};
812
813static double baseline_percent(struct hist_entry *he)
814{
815 u64 total = hists__total_period(he->hists);
816
817 return 100.0 * he->stat.period / total;
818}
819
820static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
821 struct perf_hpp *hpp, struct hist_entry *he)
822{
823 struct diff_hpp_fmt *dfmt =
824 container_of(fmt, struct diff_hpp_fmt, fmt);
825 double percent = baseline_percent(he);
826 char pfmt[20] = " ";
827
828 if (!he->dummy) {
829 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
830 return percent_color_snprintf(hpp->buf, hpp->size,
831 pfmt, percent);
832 } else
833 return scnprintf(hpp->buf, hpp->size, "%*s",
834 dfmt->header_width, pfmt);
835}
836
837static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
838{
839 double percent = baseline_percent(he);
840 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
841 int ret = 0;
842
843 if (!he->dummy)
844 ret = scnprintf(buf, size, fmt, percent);
845
846 return ret;
847}
848
849static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
850 struct perf_hpp *hpp, struct hist_entry *he,
851 int comparison_method)
852{
853 struct diff_hpp_fmt *dfmt =
854 container_of(fmt, struct diff_hpp_fmt, fmt);
855 struct hist_entry *pair = get_pair_fmt(he, dfmt);
856 double diff;
857 s64 wdiff;
858 char pfmt[20] = " ";
859
860 if (!pair)
861 goto no_print;
862
863 switch (comparison_method) {
864 case COMPUTE_DELTA:
865 if (pair->diff.computed)
866 diff = pair->diff.period_ratio_delta;
867 else
868 diff = compute_delta(he, pair);
869
870 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
871 return percent_color_snprintf(hpp->buf, hpp->size,
872 pfmt, diff);
873 case COMPUTE_RATIO:
874 if (he->dummy)
875 goto dummy_print;
876 if (pair->diff.computed)
877 diff = pair->diff.period_ratio;
878 else
879 diff = compute_ratio(he, pair);
880
881 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
882 return value_color_snprintf(hpp->buf, hpp->size,
883 pfmt, diff);
884 case COMPUTE_WEIGHTED_DIFF:
885 if (he->dummy)
886 goto dummy_print;
887 if (pair->diff.computed)
888 wdiff = pair->diff.wdiff;
889 else
890 wdiff = compute_wdiff(he, pair);
891
892 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
893 return color_snprintf(hpp->buf, hpp->size,
894 get_percent_color(wdiff),
895 pfmt, wdiff);
896 default:
897 BUG_ON(1);
898 }
899dummy_print:
900 return scnprintf(hpp->buf, hpp->size, "%*s",
901 dfmt->header_width, "N/A");
902no_print:
903 return scnprintf(hpp->buf, hpp->size, "%*s",
904 dfmt->header_width, pfmt);
905}
906
907static int hpp__color_delta(struct perf_hpp_fmt *fmt,
908 struct perf_hpp *hpp, struct hist_entry *he)
909{
910 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
911}
912
913static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
914 struct perf_hpp *hpp, struct hist_entry *he)
915{
916 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
917}
918
919static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
920 struct perf_hpp *hpp, struct hist_entry *he)
921{
922 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
923}
924
925static void
926hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
927{
928 switch (idx) {
929 case PERF_HPP_DIFF__PERIOD_BASELINE:
930 scnprintf(buf, size, "%" PRIu64, he->stat.period);
931 break;
932
933 default:
934 break;
935 }
936}
937
938static void
939hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
940 int idx, char *buf, size_t size)
941{
942 double diff;
943 double ratio;
944 s64 wdiff;
945
946 switch (idx) {
947 case PERF_HPP_DIFF__DELTA:
948 if (pair->diff.computed)
949 diff = pair->diff.period_ratio_delta;
950 else
951 diff = compute_delta(he, pair);
952
953 scnprintf(buf, size, "%+4.2F%%", diff);
954 break;
955
956 case PERF_HPP_DIFF__RATIO:
957 /* No point for ratio number if we are dummy.. */
958 if (he->dummy) {
959 scnprintf(buf, size, "N/A");
960 break;
961 }
962
963 if (pair->diff.computed)
964 ratio = pair->diff.period_ratio;
965 else
966 ratio = compute_ratio(he, pair);
967
968 if (ratio > 0.0)
969 scnprintf(buf, size, "%14.6F", ratio);
970 break;
971
972 case PERF_HPP_DIFF__WEIGHTED_DIFF:
973 /* No point for wdiff number if we are dummy.. */
974 if (he->dummy) {
975 scnprintf(buf, size, "N/A");
976 break;
977 }
978
979 if (pair->diff.computed)
980 wdiff = pair->diff.wdiff;
981 else
982 wdiff = compute_wdiff(he, pair);
983
984 if (wdiff != 0)
985 scnprintf(buf, size, "%14ld", wdiff);
986 break;
987
988 case PERF_HPP_DIFF__FORMULA:
989 formula_fprintf(he, pair, buf, size);
990 break;
991
992 case PERF_HPP_DIFF__PERIOD:
993 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
994 break;
995
996 default:
997 BUG_ON(1);
998 };
999}
1000
1001static void
1002__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1003 char *buf, size_t size)
1004{
1005 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1006 int idx = dfmt->idx;
1007
1008 /* baseline is special */
1009 if (idx == PERF_HPP_DIFF__BASELINE)
1010 hpp__entry_baseline(he, buf, size);
1011 else {
1012 if (pair)
1013 hpp__entry_pair(he, pair, idx, buf, size);
1014 else
1015 hpp__entry_unpair(he, idx, buf, size);
1016 }
1017}
1018
1019static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1020 struct hist_entry *he)
1021{
1022 struct diff_hpp_fmt *dfmt =
1023 container_of(_fmt, struct diff_hpp_fmt, fmt);
1024 char buf[MAX_COL_WIDTH] = " ";
1025
1026 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1027
1028 if (symbol_conf.field_sep)
1029 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1030 else
1031 return scnprintf(hpp->buf, hpp->size, "%*s",
1032 dfmt->header_width, buf);
1033}
1034
1035static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1036 struct hists *hists __maybe_unused,
1037 int line __maybe_unused,
1038 int *span __maybe_unused)
1039{
1040 struct diff_hpp_fmt *dfmt =
1041 container_of(fmt, struct diff_hpp_fmt, fmt);
1042
1043 BUG_ON(!dfmt->header);
1044 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1045}
1046
1047static int hpp__width(struct perf_hpp_fmt *fmt,
1048 struct perf_hpp *hpp __maybe_unused,
1049 struct hists *hists __maybe_unused)
1050{
1051 struct diff_hpp_fmt *dfmt =
1052 container_of(fmt, struct diff_hpp_fmt, fmt);
1053
1054 BUG_ON(dfmt->header_width <= 0);
1055 return dfmt->header_width;
1056}
1057
1058static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1059{
1060#define MAX_HEADER_NAME 100
1061 char buf_indent[MAX_HEADER_NAME];
1062 char buf[MAX_HEADER_NAME];
1063 const char *header = NULL;
1064 int width = 0;
1065
1066 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1067 header = columns[dfmt->idx].name;
1068 width = columns[dfmt->idx].width;
1069
1070 /* Only our defined HPP fmts should appear here. */
1071 BUG_ON(!header);
1072
1073 if (data__files_cnt > 2)
1074 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1075
1076#define NAME (data__files_cnt > 2 ? buf : header)
1077 dfmt->header_width = width;
1078 width = (int) strlen(NAME);
1079 if (dfmt->header_width < width)
1080 dfmt->header_width = width;
1081
1082 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1083 dfmt->header_width, NAME);
1084
1085 dfmt->header = strdup(buf_indent);
1086#undef MAX_HEADER_NAME
1087#undef NAME
1088}
1089
1090static void data__hpp_register(struct data__file *d, int idx)
1091{
1092 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1093 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1094
1095 dfmt->idx = idx;
1096
1097 fmt->header = hpp__header;
1098 fmt->width = hpp__width;
1099 fmt->entry = hpp__entry_global;
1100 fmt->cmp = hist_entry__cmp_nop;
1101 fmt->collapse = hist_entry__cmp_nop;
1102
1103 /* TODO more colors */
1104 switch (idx) {
1105 case PERF_HPP_DIFF__BASELINE:
1106 fmt->color = hpp__color_baseline;
1107 fmt->sort = hist_entry__cmp_baseline;
1108 break;
1109 case PERF_HPP_DIFF__DELTA:
1110 fmt->color = hpp__color_delta;
1111 fmt->sort = hist_entry__cmp_delta;
1112 break;
1113 case PERF_HPP_DIFF__RATIO:
1114 fmt->color = hpp__color_ratio;
1115 fmt->sort = hist_entry__cmp_ratio;
1116 break;
1117 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1118 fmt->color = hpp__color_wdiff;
1119 fmt->sort = hist_entry__cmp_wdiff;
1120 break;
1121 default:
1122 fmt->sort = hist_entry__cmp_nop;
1123 break;
1124 }
1125
1126 init_header(d, dfmt);
1127 perf_hpp__column_register(fmt);
1128 perf_hpp__register_sort_field(fmt);
1129}
1130
1131static int ui_init(void)
1132{
1133 struct data__file *d;
1134 struct perf_hpp_fmt *fmt;
1135 int i;
1136
1137 data__for_each_file(i, d) {
1138
1139 /*
1140 * Baseline or compute realted columns:
1141 *
1142 * PERF_HPP_DIFF__BASELINE
1143 * PERF_HPP_DIFF__DELTA
1144 * PERF_HPP_DIFF__RATIO
1145 * PERF_HPP_DIFF__WEIGHTED_DIFF
1146 */
1147 data__hpp_register(d, i ? compute_2_hpp[compute] :
1148 PERF_HPP_DIFF__BASELINE);
1149
1150 /*
1151 * And the rest:
1152 *
1153 * PERF_HPP_DIFF__FORMULA
1154 * PERF_HPP_DIFF__PERIOD
1155 * PERF_HPP_DIFF__PERIOD_BASELINE
1156 */
1157 if (show_formula && i)
1158 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1159
1160 if (show_period)
1161 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1162 PERF_HPP_DIFF__PERIOD_BASELINE);
1163 }
1164
1165 if (!sort_compute)
1166 return 0;
1167
1168 /*
1169 * Prepend an fmt to sort on columns at 'sort_compute' first.
1170 * This fmt is added only to the sort list but not to the
1171 * output fields list.
1172 *
1173 * Note that this column (data) can be compared twice - one
1174 * for this 'sort_compute' fmt and another for the normal
1175 * diff_hpp_fmt. But it shouldn't a problem as most entries
1176 * will be sorted out by first try or baseline and comparing
1177 * is not a costly operation.
1178 */
1179 fmt = zalloc(sizeof(*fmt));
1180 if (fmt == NULL) {
1181 pr_err("Memory allocation failed\n");
1182 return -1;
1183 }
1184
1185 fmt->cmp = hist_entry__cmp_nop;
1186 fmt->collapse = hist_entry__cmp_nop;
1187
1188 switch (compute) {
1189 case COMPUTE_DELTA:
1190 fmt->sort = hist_entry__cmp_delta_idx;
1191 break;
1192 case COMPUTE_RATIO:
1193 fmt->sort = hist_entry__cmp_ratio_idx;
1194 break;
1195 case COMPUTE_WEIGHTED_DIFF:
1196 fmt->sort = hist_entry__cmp_wdiff_idx;
1197 break;
1198 default:
1199 BUG_ON(1);
1200 }
1201
1202 perf_hpp__prepend_sort_field(fmt);
1203 return 0;
1204}
1205
1206static int data_init(int argc, const char **argv)
1207{
1208 struct data__file *d;
1209 static const char *defaults[] = {
1210 "perf.data.old",
1211 "perf.data",
1212 };
1213 bool use_default = true;
1214 int i;
1215
1216 data__files_cnt = 2;
1217
1218 if (argc) {
1219 if (argc == 1)
1220 defaults[1] = argv[0];
1221 else {
1222 data__files_cnt = argc;
1223 use_default = false;
1224 }
1225 } else if (perf_guest) {
1226 defaults[0] = "perf.data.host";
1227 defaults[1] = "perf.data.guest";
1228 }
1229
1230 if (sort_compute >= (unsigned int) data__files_cnt) {
1231 pr_err("Order option out of limit.\n");
1232 return -EINVAL;
1233 }
1234
1235 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1236 if (!data__files)
1237 return -ENOMEM;
1238
1239 data__for_each_file(i, d) {
1240 struct perf_data_file *file = &d->file;
1241
1242 file->path = use_default ? defaults[i] : argv[i];
1243 file->mode = PERF_DATA_MODE_READ,
1244 file->force = force,
1245
1246 d->idx = i;
1247 }
1248
1249 return 0;
1250}
1251
1252int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1253{
1254 int ret = hists__init();
1255
1256 if (ret < 0)
1257 return ret;
1258
1259 argc = parse_options(argc, argv, options, diff_usage, 0);
1260
1261 if (symbol__init(NULL) < 0)
1262 return -1;
1263
1264 if (data_init(argc, argv) < 0)
1265 return -1;
1266
1267 if (ui_init() < 0)
1268 return -1;
1269
1270 sort__mode = SORT_MODE__DIFF;
1271
1272 if (setup_sorting(NULL) < 0)
1273 usage_with_options(diff_usage, options);
1274
1275 setup_pager();
1276
1277 sort__setup_elide(NULL);
1278
1279 return __cmd_diff();
1280}