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Merge tag 'ntb-5.11' of git://github.com/jonmason/ntb
[linux/fpc-iii.git] / tools / perf / builtin-diff.c
blob8f6c784ce629c99efd3153f37c92fad7c32368f7
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * builtin-diff.c
4 *
5 * Builtin diff command: Analyze two perf.data input files, look up and read
6 * DSOs and symbol information, sort them and produce a diff.
7 */
8 #include "builtin.h"
9 #include "perf.h"
10
11 #include "util/debug.h"
12 #include "util/event.h"
13 #include "util/hist.h"
14 #include "util/evsel.h"
15 #include "util/evlist.h"
16 #include "util/session.h"
17 #include "util/tool.h"
18 #include "util/sort.h"
19 #include "util/srcline.h"
20 #include "util/symbol.h"
21 #include "util/data.h"
22 #include "util/config.h"
23 #include "util/time-utils.h"
24 #include "util/annotate.h"
25 #include "util/map.h"
26 #include "util/spark.h"
27 #include "util/block-info.h"
28 #include "util/stream.h"
29 #include <linux/err.h>
30 #include <linux/zalloc.h>
31 #include <subcmd/pager.h>
32 #include <subcmd/parse-options.h>
33
34 #include <errno.h>
35 #include <inttypes.h>
36 #include <stdlib.h>
37 #include <math.h>
38
39 struct perf_diff {
40 struct perf_tool tool;
41 const char *time_str;
42 struct perf_time_interval *ptime_range;
43 int range_size;
44 int range_num;
45 bool has_br_stack;
46 bool stream;
47 };
48
49 /* Diff command specific HPP columns. */
50 enum {
51 PERF_HPP_DIFF__BASELINE,
52 PERF_HPP_DIFF__PERIOD,
53 PERF_HPP_DIFF__PERIOD_BASELINE,
54 PERF_HPP_DIFF__DELTA,
55 PERF_HPP_DIFF__RATIO,
56 PERF_HPP_DIFF__WEIGHTED_DIFF,
57 PERF_HPP_DIFF__FORMULA,
58 PERF_HPP_DIFF__DELTA_ABS,
59 PERF_HPP_DIFF__CYCLES,
60 PERF_HPP_DIFF__CYCLES_HIST,
61
62 PERF_HPP_DIFF__MAX_INDEX
63 };
64
65 struct diff_hpp_fmt {
66 struct perf_hpp_fmt fmt;
67 int idx;
68 char *header;
69 int header_width;
70 };
71
72 struct data__file {
73 struct perf_session *session;
74 struct perf_data data;
75 int idx;
76 struct hists *hists;
77 struct evlist_streams *evlist_streams;
78 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
79 };
80
81 static struct data__file *data__files;
82 static int data__files_cnt;
83
84 #define data__for_each_file_start(i, d, s) \
85 for (i = s, d = &data__files[s]; \
86 i < data__files_cnt; \
87 i++, d = &data__files[i])
88
89 #define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
90 #define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
91
92 static bool force;
93 static bool show_period;
94 static bool show_formula;
95 static bool show_baseline_only;
96 static bool cycles_hist;
97 static unsigned int sort_compute = 1;
98
99 static s64 compute_wdiff_w1;
100 static s64 compute_wdiff_w2;
101
102 static const char *cpu_list;
103 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
104
105 enum {
106 COMPUTE_DELTA,
107 COMPUTE_RATIO,
108 COMPUTE_WEIGHTED_DIFF,
109 COMPUTE_DELTA_ABS,
110 COMPUTE_CYCLES,
111 COMPUTE_MAX,
112 COMPUTE_STREAM, /* After COMPUTE_MAX to avoid use current compute arrays */
113 };
114
115 const char *compute_names[COMPUTE_MAX] = {
116 [COMPUTE_DELTA] = "delta",
117 [COMPUTE_DELTA_ABS] = "delta-abs",
118 [COMPUTE_RATIO] = "ratio",
119 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
120 [COMPUTE_CYCLES] = "cycles",
121 };
122
123 static int compute = COMPUTE_DELTA_ABS;
124
125 static int compute_2_hpp[COMPUTE_MAX] = {
126 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
127 [COMPUTE_DELTA_ABS] = PERF_HPP_DIFF__DELTA_ABS,
128 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
129 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
130 [COMPUTE_CYCLES] = PERF_HPP_DIFF__CYCLES,
131 };
132
133 #define MAX_COL_WIDTH 70
134
135 static struct header_column {
136 const char *name;
137 int width;
138 } columns[PERF_HPP_DIFF__MAX_INDEX] = {
139 [PERF_HPP_DIFF__BASELINE] = {
140 .name = "Baseline",
141 },
142 [PERF_HPP_DIFF__PERIOD] = {
143 .name = "Period",
144 .width = 14,
145 },
146 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
147 .name = "Base period",
148 .width = 14,
149 },
150 [PERF_HPP_DIFF__DELTA] = {
151 .name = "Delta",
152 .width = 7,
153 },
154 [PERF_HPP_DIFF__DELTA_ABS] = {
155 .name = "Delta Abs",
156 .width = 7,
157 },
158 [PERF_HPP_DIFF__RATIO] = {
159 .name = "Ratio",
160 .width = 14,
161 },
162 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
163 .name = "Weighted diff",
164 .width = 14,
165 },
166 [PERF_HPP_DIFF__FORMULA] = {
167 .name = "Formula",
168 .width = MAX_COL_WIDTH,
169 },
170 [PERF_HPP_DIFF__CYCLES] = {
171 .name = "[Program Block Range] Cycles Diff",
172 .width = 70,
173 },
174 [PERF_HPP_DIFF__CYCLES_HIST] = {
175 .name = "stddev/Hist",
176 .width = NUM_SPARKS + 9,
177 }
178 };
179
180 static int setup_compute_opt_wdiff(char *opt)
181 {
182 char *w1_str = opt;
183 char *w2_str;
184
185 int ret = -EINVAL;
186
187 if (!opt)
188 goto out;
189
190 w2_str = strchr(opt, ',');
191 if (!w2_str)
192 goto out;
193
194 *w2_str++ = 0x0;
195 if (!*w2_str)
196 goto out;
197
198 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
199 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
200
201 if (!compute_wdiff_w1 || !compute_wdiff_w2)
202 goto out;
203
204 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
205 compute_wdiff_w1, compute_wdiff_w2);
206
207 ret = 0;
208
209 out:
210 if (ret)
211 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
212
213 return ret;
214 }
215
216 static int setup_compute_opt(char *opt)
217 {
218 if (compute == COMPUTE_WEIGHTED_DIFF)
219 return setup_compute_opt_wdiff(opt);
220
221 if (opt) {
222 pr_err("Failed: extra option specified '%s'", opt);
223 return -EINVAL;
224 }
225
226 return 0;
227 }
228
229 static int setup_compute(const struct option *opt, const char *str,
230 int unset __maybe_unused)
231 {
232 int *cp = (int *) opt->value;
233 char *cstr = (char *) str;
234 char buf[50];
235 unsigned i;
236 char *option;
237
238 if (!str) {
239 *cp = COMPUTE_DELTA;
240 return 0;
241 }
242
243 option = strchr(str, ':');
244 if (option) {
245 unsigned len = option++ - str;
246
247 /*
248 * The str data are not writeable, so we need
249 * to use another buffer.
250 */
251
252 /* No option value is longer. */
253 if (len >= sizeof(buf))
254 return -EINVAL;
255
256 strncpy(buf, str, len);
257 buf[len] = 0x0;
258 cstr = buf;
259 }
260
261 for (i = 0; i < COMPUTE_MAX; i++)
262 if (!strcmp(cstr, compute_names[i])) {
263 *cp = i;
264 return setup_compute_opt(option);
265 }
266
267 pr_err("Failed: '%s' is not computation method "
268 "(use 'delta','ratio' or 'wdiff')\n", str);
269 return -EINVAL;
270 }
271
272 static double period_percent(struct hist_entry *he, u64 period)
273 {
274 u64 total = hists__total_period(he->hists);
275
276 return (period * 100.0) / total;
277 }
278
279 static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
280 {
281 double old_percent = period_percent(he, he->stat.period);
282 double new_percent = period_percent(pair, pair->stat.period);
283
284 pair->diff.period_ratio_delta = new_percent - old_percent;
285 pair->diff.computed = true;
286 return pair->diff.period_ratio_delta;
287 }
288
289 static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
290 {
291 double old_period = he->stat.period ?: 1;
292 double new_period = pair->stat.period;
293
294 pair->diff.computed = true;
295 pair->diff.period_ratio = new_period / old_period;
296 return pair->diff.period_ratio;
297 }
298
299 static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
300 {
301 u64 old_period = he->stat.period;
302 u64 new_period = pair->stat.period;
303
304 pair->diff.computed = true;
305 pair->diff.wdiff = new_period * compute_wdiff_w2 -
306 old_period * compute_wdiff_w1;
307
308 return pair->diff.wdiff;
309 }
310
311 static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
312 char *buf, size_t size)
313 {
314 u64 he_total = he->hists->stats.total_period;
315 u64 pair_total = pair->hists->stats.total_period;
316
317 if (symbol_conf.filter_relative) {
318 he_total = he->hists->stats.total_non_filtered_period;
319 pair_total = pair->hists->stats.total_non_filtered_period;
320 }
321 return scnprintf(buf, size,
322 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
323 "(%" PRIu64 " * 100 / %" PRIu64 ")",
324 pair->stat.period, pair_total,
325 he->stat.period, he_total);
326 }
327
328 static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
329 char *buf, size_t size)
330 {
331 double old_period = he->stat.period;
332 double new_period = pair->stat.period;
333
334 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
335 }
336
337 static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
338 char *buf, size_t size)
339 {
340 u64 old_period = he->stat.period;
341 u64 new_period = pair->stat.period;
342
343 return scnprintf(buf, size,
344 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
345 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
346 }
347
348 static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
349 char *buf, size_t size)
350 {
351 switch (compute) {
352 case COMPUTE_DELTA:
353 case COMPUTE_DELTA_ABS:
354 return formula_delta(he, pair, buf, size);
355 case COMPUTE_RATIO:
356 return formula_ratio(he, pair, buf, size);
357 case COMPUTE_WEIGHTED_DIFF:
358 return formula_wdiff(he, pair, buf, size);
359 default:
360 BUG_ON(1);
361 }
362
363 return -1;
364 }
365
366 static void *block_hist_zalloc(size_t size)
367 {
368 struct block_hist *bh;
369
370 bh = zalloc(size + sizeof(*bh));
371 if (!bh)
372 return NULL;
373
374 return &bh->he;
375 }
376
377 static void block_hist_free(void *he)
378 {
379 struct block_hist *bh;
380
381 bh = container_of(he, struct block_hist, he);
382 hists__delete_entries(&bh->block_hists);
383 free(bh);
384 }
385
386 struct hist_entry_ops block_hist_ops = {
387 .new = block_hist_zalloc,
388 .free = block_hist_free,
389 };
390
391 static int diff__process_sample_event(struct perf_tool *tool,
392 union perf_event *event,
393 struct perf_sample *sample,
394 struct evsel *evsel,
395 struct machine *machine)
396 {
397 struct perf_diff *pdiff = container_of(tool, struct perf_diff, tool);
398 struct addr_location al;
399 struct hists *hists = evsel__hists(evsel);
400 struct hist_entry_iter iter = {
401 .evsel = evsel,
402 .sample = sample,
403 .ops = &hist_iter_normal,
404 };
405 int ret = -1;
406
407 if (perf_time__ranges_skip_sample(pdiff->ptime_range, pdiff->range_num,
408 sample->time)) {
409 return 0;
410 }
411
412 if (machine__resolve(machine, &al, sample) < 0) {
413 pr_warning("problem processing %d event, skipping it.\n",
414 event->header.type);
415 return -1;
416 }
417
418 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) {
419 ret = 0;
420 goto out_put;
421 }
422
423 switch (compute) {
424 case COMPUTE_CYCLES:
425 if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
426 NULL, NULL, sample, true)) {
427 pr_warning("problem incrementing symbol period, "
428 "skipping event\n");
429 goto out_put;
430 }
431
432 hist__account_cycles(sample->branch_stack, &al, sample, false,
433 NULL);
434 break;
435
436 case COMPUTE_STREAM:
437 if (hist_entry_iter__add(&iter, &al, PERF_MAX_STACK_DEPTH,
438 NULL)) {
439 pr_debug("problem adding hist entry, skipping event\n");
440 goto out_put;
441 }
442 break;
443
444 default:
445 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample,
446 true)) {
447 pr_warning("problem incrementing symbol period, "
448 "skipping event\n");
449 goto out_put;
450 }
451 }
452
453 /*
454 * The total_period is updated here before going to the output
455 * tree since normally only the baseline hists will call
456 * hists__output_resort() and precompute needs the total
457 * period in order to sort entries by percentage delta.
458 */
459 hists->stats.total_period += sample->period;
460 if (!al.filtered)
461 hists->stats.total_non_filtered_period += sample->period;
462 ret = 0;
463 out_put:
464 addr_location__put(&al);
465 return ret;
466 }
467
468 static struct perf_diff pdiff = {
469 .tool = {
470 .sample = diff__process_sample_event,
471 .mmap = perf_event__process_mmap,
472 .mmap2 = perf_event__process_mmap2,
473 .comm = perf_event__process_comm,
474 .exit = perf_event__process_exit,
475 .fork = perf_event__process_fork,
476 .lost = perf_event__process_lost,
477 .namespaces = perf_event__process_namespaces,
478 .cgroup = perf_event__process_cgroup,
479 .ordered_events = true,
480 .ordering_requires_timestamps = true,
481 },
482 };
483
484 static struct evsel *evsel_match(struct evsel *evsel,
485 struct evlist *evlist)
486 {
487 struct evsel *e;
488
489 evlist__for_each_entry(evlist, e) {
490 if (evsel__match2(evsel, e))
491 return e;
492 }
493
494 return NULL;
495 }
496
497 static void evlist__collapse_resort(struct evlist *evlist)
498 {
499 struct evsel *evsel;
500
501 evlist__for_each_entry(evlist, evsel) {
502 struct hists *hists = evsel__hists(evsel);
503
504 hists__collapse_resort(hists, NULL);
505 }
506 }
507
508 static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
509 {
510 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
511 void *ptr = dfmt - dfmt->idx;
512 struct data__file *d = container_of(ptr, struct data__file, fmt);
513
514 return d;
515 }
516
517 static struct hist_entry*
518 get_pair_data(struct hist_entry *he, struct data__file *d)
519 {
520 if (hist_entry__has_pairs(he)) {
521 struct hist_entry *pair;
522
523 list_for_each_entry(pair, &he->pairs.head, pairs.node)
524 if (pair->hists == d->hists)
525 return pair;
526 }
527
528 return NULL;
529 }
530
531 static struct hist_entry*
532 get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
533 {
534 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
535
536 return get_pair_data(he, d);
537 }
538
539 static void hists__baseline_only(struct hists *hists)
540 {
541 struct rb_root_cached *root;
542 struct rb_node *next;
543
544 if (hists__has(hists, need_collapse))
545 root = &hists->entries_collapsed;
546 else
547 root = hists->entries_in;
548
549 next = rb_first_cached(root);
550 while (next != NULL) {
551 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
552
553 next = rb_next(&he->rb_node_in);
554 if (!hist_entry__next_pair(he)) {
555 rb_erase_cached(&he->rb_node_in, root);
556 hist_entry__delete(he);
557 }
558 }
559 }
560
561 static int64_t block_cycles_diff_cmp(struct hist_entry *left,
562 struct hist_entry *right)
563 {
564 bool pairs_left = hist_entry__has_pairs(left);
565 bool pairs_right = hist_entry__has_pairs(right);
566 s64 l, r;
567
568 if (!pairs_left && !pairs_right)
569 return 0;
570
571 l = llabs(left->diff.cycles);
572 r = llabs(right->diff.cycles);
573 return r - l;
574 }
575
576 static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused,
577 struct hist_entry *left, struct hist_entry *right)
578 {
579 return block_cycles_diff_cmp(right, left);
580 }
581
582 static void init_block_hist(struct block_hist *bh)
583 {
584 __hists__init(&bh->block_hists, &bh->block_list);
585 perf_hpp_list__init(&bh->block_list);
586
587 INIT_LIST_HEAD(&bh->block_fmt.list);
588 INIT_LIST_HEAD(&bh->block_fmt.sort_list);
589 bh->block_fmt.cmp = block_info__cmp;
590 bh->block_fmt.sort = block_sort;
591 perf_hpp_list__register_sort_field(&bh->block_list,
592 &bh->block_fmt);
593 bh->valid = true;
594 }
595
596 static struct hist_entry *get_block_pair(struct hist_entry *he,
597 struct hists *hists_pair)
598 {
599 struct rb_root_cached *root = hists_pair->entries_in;
600 struct rb_node *next = rb_first_cached(root);
601 int64_t cmp;
602
603 while (next != NULL) {
604 struct hist_entry *he_pair = rb_entry(next, struct hist_entry,
605 rb_node_in);
606
607 next = rb_next(&he_pair->rb_node_in);
608
609 cmp = __block_info__cmp(he_pair, he);
610 if (!cmp)
611 return he_pair;
612 }
613
614 return NULL;
615 }
616
617 static void init_spark_values(unsigned long *svals, int num)
618 {
619 for (int i = 0; i < num; i++)
620 svals[i] = 0;
621 }
622
623 static void update_spark_value(unsigned long *svals, int num,
624 struct stats *stats, u64 val)
625 {
626 int n = stats->n;
627
628 if (n < num)
629 svals[n] = val;
630 }
631
632 static void compute_cycles_diff(struct hist_entry *he,
633 struct hist_entry *pair)
634 {
635 pair->diff.computed = true;
636 if (pair->block_info->num && he->block_info->num) {
637 pair->diff.cycles =
638 pair->block_info->cycles_aggr / pair->block_info->num_aggr -
639 he->block_info->cycles_aggr / he->block_info->num_aggr;
640
641 if (!cycles_hist)
642 return;
643
644 init_stats(&pair->diff.stats);
645 init_spark_values(pair->diff.svals, NUM_SPARKS);
646
647 for (int i = 0; i < pair->block_info->num; i++) {
648 u64 val;
649
650 if (i >= he->block_info->num || i >= NUM_SPARKS)
651 break;
652
653 val = llabs(pair->block_info->cycles_spark[i] -
654 he->block_info->cycles_spark[i]);
655
656 update_spark_value(pair->diff.svals, NUM_SPARKS,
657 &pair->diff.stats, val);
658 update_stats(&pair->diff.stats, val);
659 }
660 }
661 }
662
663 static void block_hists_match(struct hists *hists_base,
664 struct hists *hists_pair)
665 {
666 struct rb_root_cached *root = hists_base->entries_in;
667 struct rb_node *next = rb_first_cached(root);
668
669 while (next != NULL) {
670 struct hist_entry *he = rb_entry(next, struct hist_entry,
671 rb_node_in);
672 struct hist_entry *pair = get_block_pair(he, hists_pair);
673
674 next = rb_next(&he->rb_node_in);
675
676 if (pair) {
677 hist_entry__add_pair(pair, he);
678 compute_cycles_diff(he, pair);
679 }
680 }
681 }
682
683 static void hists__precompute(struct hists *hists)
684 {
685 struct rb_root_cached *root;
686 struct rb_node *next;
687
688 if (hists__has(hists, need_collapse))
689 root = &hists->entries_collapsed;
690 else
691 root = hists->entries_in;
692
693 next = rb_first_cached(root);
694 while (next != NULL) {
695 struct block_hist *bh, *pair_bh;
696 struct hist_entry *he, *pair;
697 struct data__file *d;
698 int i;
699
700 he = rb_entry(next, struct hist_entry, rb_node_in);
701 next = rb_next(&he->rb_node_in);
702
703 if (compute == COMPUTE_CYCLES) {
704 bh = container_of(he, struct block_hist, he);
705 init_block_hist(bh);
706 block_info__process_sym(he, bh, NULL, 0);
707 }
708
709 data__for_each_file_new(i, d) {
710 pair = get_pair_data(he, d);
711 if (!pair)
712 continue;
713
714 switch (compute) {
715 case COMPUTE_DELTA:
716 case COMPUTE_DELTA_ABS:
717 compute_delta(he, pair);
718 break;
719 case COMPUTE_RATIO:
720 compute_ratio(he, pair);
721 break;
722 case COMPUTE_WEIGHTED_DIFF:
723 compute_wdiff(he, pair);
724 break;
725 case COMPUTE_CYCLES:
726 pair_bh = container_of(pair, struct block_hist,
727 he);
728 init_block_hist(pair_bh);
729 block_info__process_sym(pair, pair_bh, NULL, 0);
730
731 bh = container_of(he, struct block_hist, he);
732
733 if (bh->valid && pair_bh->valid) {
734 block_hists_match(&bh->block_hists,
735 &pair_bh->block_hists);
736 hists__output_resort(&pair_bh->block_hists,
737 NULL);
738 }
739 break;
740 default:
741 BUG_ON(1);
742 }
743 }
744 }
745 }
746
747 static int64_t cmp_doubles(double l, double r)
748 {
749 if (l > r)
750 return -1;
751 else if (l < r)
752 return 1;
753 else
754 return 0;
755 }
756
757 static int64_t
758 __hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
759 int c)
760 {
761 switch (c) {
762 case COMPUTE_DELTA:
763 {
764 double l = left->diff.period_ratio_delta;
765 double r = right->diff.period_ratio_delta;
766
767 return cmp_doubles(l, r);
768 }
769 case COMPUTE_DELTA_ABS:
770 {
771 double l = fabs(left->diff.period_ratio_delta);
772 double r = fabs(right->diff.period_ratio_delta);
773
774 return cmp_doubles(l, r);
775 }
776 case COMPUTE_RATIO:
777 {
778 double l = left->diff.period_ratio;
779 double r = right->diff.period_ratio;
780
781 return cmp_doubles(l, r);
782 }
783 case COMPUTE_WEIGHTED_DIFF:
784 {
785 s64 l = left->diff.wdiff;
786 s64 r = right->diff.wdiff;
787
788 return r - l;
789 }
790 default:
791 BUG_ON(1);
792 }
793
794 return 0;
795 }
796
797 static int64_t
798 hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
799 int c, int sort_idx)
800 {
801 bool pairs_left = hist_entry__has_pairs(left);
802 bool pairs_right = hist_entry__has_pairs(right);
803 struct hist_entry *p_right, *p_left;
804
805 if (!pairs_left && !pairs_right)
806 return 0;
807
808 if (!pairs_left || !pairs_right)
809 return pairs_left ? -1 : 1;
810
811 p_left = get_pair_data(left, &data__files[sort_idx]);
812 p_right = get_pair_data(right, &data__files[sort_idx]);
813
814 if (!p_left && !p_right)
815 return 0;
816
817 if (!p_left || !p_right)
818 return p_left ? -1 : 1;
819
820 /*
821 * We have 2 entries of same kind, let's
822 * make the data comparison.
823 */
824 return __hist_entry__cmp_compute(p_left, p_right, c);
825 }
826
827 static int64_t
828 hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
829 int c, int sort_idx)
830 {
831 struct hist_entry *p_right, *p_left;
832
833 p_left = get_pair_data(left, &data__files[sort_idx]);
834 p_right = get_pair_data(right, &data__files[sort_idx]);
835
836 if (!p_left && !p_right)
837 return 0;
838
839 if (!p_left || !p_right)
840 return p_left ? -1 : 1;
841
842 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
843 /*
844 * The delta can be computed without the baseline, but
845 * others are not. Put those entries which have no
846 * values below.
847 */
848 if (left->dummy && right->dummy)
849 return 0;
850
851 if (left->dummy || right->dummy)
852 return left->dummy ? 1 : -1;
853 }
854
855 return __hist_entry__cmp_compute(p_left, p_right, c);
856 }
857
858 static int64_t
859 hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
860 struct hist_entry *left __maybe_unused,
861 struct hist_entry *right __maybe_unused)
862 {
863 return 0;
864 }
865
866 static int64_t
867 hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
868 struct hist_entry *left, struct hist_entry *right)
869 {
870 if (left->stat.period == right->stat.period)
871 return 0;
872 return left->stat.period > right->stat.period ? 1 : -1;
873 }
874
875 static int64_t
876 hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
877 struct hist_entry *left, struct hist_entry *right)
878 {
879 struct data__file *d = fmt_to_data_file(fmt);
880
881 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
882 }
883
884 static int64_t
885 hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
886 struct hist_entry *left, struct hist_entry *right)
887 {
888 struct data__file *d = fmt_to_data_file(fmt);
889
890 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
891 }
892
893 static int64_t
894 hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
895 struct hist_entry *left, struct hist_entry *right)
896 {
897 struct data__file *d = fmt_to_data_file(fmt);
898
899 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
900 }
901
902 static int64_t
903 hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
904 struct hist_entry *left, struct hist_entry *right)
905 {
906 struct data__file *d = fmt_to_data_file(fmt);
907
908 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
909 }
910
911 static int64_t
912 hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
913 struct hist_entry *left, struct hist_entry *right)
914 {
915 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
916 sort_compute);
917 }
918
919 static int64_t
920 hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
921 struct hist_entry *left, struct hist_entry *right)
922 {
923 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
924 sort_compute);
925 }
926
927 static int64_t
928 hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
929 struct hist_entry *left, struct hist_entry *right)
930 {
931 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
932 sort_compute);
933 }
934
935 static int64_t
936 hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
937 struct hist_entry *left, struct hist_entry *right)
938 {
939 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
940 sort_compute);
941 }
942
943 static void hists__process(struct hists *hists)
944 {
945 if (show_baseline_only)
946 hists__baseline_only(hists);
947
948 hists__precompute(hists);
949 hists__output_resort(hists, NULL);
950
951 if (compute == COMPUTE_CYCLES)
952 symbol_conf.report_block = true;
953
954 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
955 !symbol_conf.use_callchain);
956 }
957
958 static void data__fprintf(void)
959 {
960 struct data__file *d;
961 int i;
962
963 fprintf(stdout, "# Data files:\n");
964
965 data__for_each_file(i, d)
966 fprintf(stdout, "# [%d] %s %s\n",
967 d->idx, d->data.path,
968 !d->idx ? "(Baseline)" : "");
969
970 fprintf(stdout, "#\n");
971 }
972
973 static void data_process(void)
974 {
975 struct evlist *evlist_base = data__files[0].session->evlist;
976 struct evsel *evsel_base;
977 bool first = true;
978
979 evlist__for_each_entry(evlist_base, evsel_base) {
980 struct hists *hists_base = evsel__hists(evsel_base);
981 struct data__file *d;
982 int i;
983
984 data__for_each_file_new(i, d) {
985 struct evlist *evlist = d->session->evlist;
986 struct evsel *evsel;
987 struct hists *hists;
988
989 evsel = evsel_match(evsel_base, evlist);
990 if (!evsel)
991 continue;
992
993 hists = evsel__hists(evsel);
994 d->hists = hists;
995
996 hists__match(hists_base, hists);
997
998 if (!show_baseline_only)
999 hists__link(hists_base, hists);
1000 }
1001
1002 if (!quiet) {
1003 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
1004 evsel__name(evsel_base));
1005 }
1006
1007 first = false;
1008
1009 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
1010 data__fprintf();
1011
1012 /* Don't sort callchain for perf diff */
1013 evsel__reset_sample_bit(evsel_base, CALLCHAIN);
1014
1015 hists__process(hists_base);
1016 }
1017 }
1018
1019 static int process_base_stream(struct data__file *data_base,
1020 struct data__file *data_pair,
1021 const char *title __maybe_unused)
1022 {
1023 struct evlist *evlist_base = data_base->session->evlist;
1024 struct evlist *evlist_pair = data_pair->session->evlist;
1025 struct evsel *evsel_base, *evsel_pair;
1026 struct evsel_streams *es_base, *es_pair;
1027
1028 evlist__for_each_entry(evlist_base, evsel_base) {
1029 evsel_pair = evsel_match(evsel_base, evlist_pair);
1030 if (!evsel_pair)
1031 continue;
1032
1033 es_base = evsel_streams__entry(data_base->evlist_streams,
1034 evsel_base->idx);
1035 if (!es_base)
1036 return -1;
1037
1038 es_pair = evsel_streams__entry(data_pair->evlist_streams,
1039 evsel_pair->idx);
1040 if (!es_pair)
1041 return -1;
1042
1043 evsel_streams__match(es_base, es_pair);
1044 evsel_streams__report(es_base, es_pair);
1045 }
1046
1047 return 0;
1048 }
1049
1050 static void stream_process(void)
1051 {
1052 /*
1053 * Stream comparison only supports two data files.
1054 * perf.data.old and perf.data. data__files[0] is perf.data.old,
1055 * data__files[1] is perf.data.
1056 */
1057 process_base_stream(&data__files[0], &data__files[1],
1058 "# Output based on old perf data:\n#\n");
1059 }
1060
1061 static void data__free(struct data__file *d)
1062 {
1063 int col;
1064
1065 if (d->evlist_streams)
1066 evlist_streams__delete(d->evlist_streams);
1067
1068 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
1069 struct diff_hpp_fmt *fmt = &d->fmt[col];
1070
1071 zfree(&fmt->header);
1072 }
1073 }
1074
1075 static int abstime_str_dup(char **pstr)
1076 {
1077 char *str = NULL;
1078
1079 if (pdiff.time_str && strchr(pdiff.time_str, ':')) {
1080 str = strdup(pdiff.time_str);
1081 if (!str)
1082 return -ENOMEM;
1083 }
1084
1085 *pstr = str;
1086 return 0;
1087 }
1088
1089 static int parse_absolute_time(struct data__file *d, char **pstr)
1090 {
1091 char *p = *pstr;
1092 int ret;
1093
1094 /*
1095 * Absolute timestamp for one file has the format: a.b,c.d
1096 * For multiple files, the format is: a.b,c.d:a.b,c.d
1097 */
1098 p = strchr(*pstr, ':');
1099 if (p) {
1100 if (p == *pstr) {
1101 pr_err("Invalid time string\n");
1102 return -EINVAL;
1103 }
1104
1105 *p = 0;
1106 p++;
1107 if (*p == 0) {
1108 pr_err("Invalid time string\n");
1109 return -EINVAL;
1110 }
1111 }
1112
1113 ret = perf_time__parse_for_ranges(*pstr, d->session,
1114 &pdiff.ptime_range,
1115 &pdiff.range_size,
1116 &pdiff.range_num);
1117 if (ret < 0)
1118 return ret;
1119
1120 if (!p || *p == 0)
1121 *pstr = NULL;
1122 else
1123 *pstr = p;
1124
1125 return ret;
1126 }
1127
1128 static int parse_percent_time(struct data__file *d)
1129 {
1130 int ret;
1131
1132 ret = perf_time__parse_for_ranges(pdiff.time_str, d->session,
1133 &pdiff.ptime_range,
1134 &pdiff.range_size,
1135 &pdiff.range_num);
1136 return ret;
1137 }
1138
1139 static int parse_time_str(struct data__file *d, char *abstime_ostr,
1140 char **pabstime_tmp)
1141 {
1142 int ret = 0;
1143
1144 if (abstime_ostr)
1145 ret = parse_absolute_time(d, pabstime_tmp);
1146 else if (pdiff.time_str)
1147 ret = parse_percent_time(d);
1148
1149 return ret;
1150 }
1151
1152 static int check_file_brstack(void)
1153 {
1154 struct data__file *d;
1155 bool has_br_stack;
1156 int i;
1157
1158 data__for_each_file(i, d) {
1159 d->session = perf_session__new(&d->data, false, &pdiff.tool);
1160 if (IS_ERR(d->session)) {
1161 pr_err("Failed to open %s\n", d->data.path);
1162 return PTR_ERR(d->session);
1163 }
1164
1165 has_br_stack = perf_header__has_feat(&d->session->header,
1166 HEADER_BRANCH_STACK);
1167 perf_session__delete(d->session);
1168 if (!has_br_stack)
1169 return 0;
1170 }
1171
1172 /* Set only all files having branch stacks */
1173 pdiff.has_br_stack = true;
1174 return 0;
1175 }
1176
1177 static int __cmd_diff(void)
1178 {
1179 struct data__file *d;
1180 int ret, i;
1181 char *abstime_ostr, *abstime_tmp;
1182
1183 ret = abstime_str_dup(&abstime_ostr);
1184 if (ret)
1185 return ret;
1186
1187 abstime_tmp = abstime_ostr;
1188 ret = -EINVAL;
1189
1190 data__for_each_file(i, d) {
1191 d->session = perf_session__new(&d->data, false, &pdiff.tool);
1192 if (IS_ERR(d->session)) {
1193 ret = PTR_ERR(d->session);
1194 pr_err("Failed to open %s\n", d->data.path);
1195 goto out_delete;
1196 }
1197
1198 if (pdiff.time_str) {
1199 ret = parse_time_str(d, abstime_ostr, &abstime_tmp);
1200 if (ret < 0)
1201 goto out_delete;
1202 }
1203
1204 if (cpu_list) {
1205 ret = perf_session__cpu_bitmap(d->session, cpu_list,
1206 cpu_bitmap);
1207 if (ret < 0)
1208 goto out_delete;
1209 }
1210
1211 ret = perf_session__process_events(d->session);
1212 if (ret) {
1213 pr_err("Failed to process %s\n", d->data.path);
1214 goto out_delete;
1215 }
1216
1217 evlist__collapse_resort(d->session->evlist);
1218
1219 if (pdiff.ptime_range)
1220 zfree(&pdiff.ptime_range);
1221
1222 if (compute == COMPUTE_STREAM) {
1223 d->evlist_streams = evlist__create_streams(
1224 d->session->evlist, 5);
1225 if (!d->evlist_streams) {
1226 ret = -ENOMEM;
1227 goto out_delete;
1228 }
1229 }
1230 }
1231
1232 if (compute == COMPUTE_STREAM)
1233 stream_process();
1234 else
1235 data_process();
1236
1237 out_delete:
1238 data__for_each_file(i, d) {
1239 perf_session__delete(d->session);
1240 data__free(d);
1241 }
1242
1243 free(data__files);
1244
1245 if (pdiff.ptime_range)
1246 zfree(&pdiff.ptime_range);
1247
1248 if (abstime_ostr)
1249 free(abstime_ostr);
1250
1251 return ret;
1252 }
1253
1254 static const char * const diff_usage[] = {
1255 "perf diff [<options>] [old_file] [new_file]",
1256 NULL,
1257 };
1258
1259 static const struct option options[] = {
1260 OPT_INCR('v', "verbose", &verbose,
1261 "be more verbose (show symbol address, etc)"),
1262 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
1263 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
1264 "Show only items with match in baseline"),
1265 OPT_CALLBACK('c', "compute", &compute,
1266 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs),cycles",
1267 "Entries differential computation selection",
1268 setup_compute),
1269 OPT_BOOLEAN('p', "period", &show_period,
1270 "Show period values."),
1271 OPT_BOOLEAN('F', "formula", &show_formula,
1272 "Show formula."),
1273 OPT_BOOLEAN(0, "cycles-hist", &cycles_hist,
1274 "Show cycles histogram and standard deviation "
1275 "- WARNING: use only with -c cycles."),
1276 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1277 "dump raw trace in ASCII"),
1278 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
1279 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1280 "file", "kallsyms pathname"),
1281 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
1282 "load module symbols - WARNING: use only with -k and LIVE kernel"),
1283 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1284 "only consider symbols in these dsos"),
1285 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1286 "only consider symbols in these comms"),
1287 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1288 "only consider these symbols"),
1289 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1290 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1291 " Please refer the man page for the complete list."),
1292 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
1293 "separator for columns, no spaces will be added between "
1294 "columns '.' is reserved."),
1295 OPT_CALLBACK(0, "symfs", NULL, "directory",
1296 "Look for files with symbols relative to this directory",
1297 symbol__config_symfs),
1298 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
1299 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1300 "How to display percentage of filtered entries", parse_filter_percentage),
1301 OPT_STRING(0, "time", &pdiff.time_str, "str",
1302 "Time span (time percent or absolute timestamp)"),
1303 OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1304 OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
1305 "only consider symbols in these pids"),
1306 OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
1307 "only consider symbols in these tids"),
1308 OPT_BOOLEAN(0, "stream", &pdiff.stream,
1309 "Enable hot streams comparison."),
1310 OPT_END()
1311 };
1312
1313 static double baseline_percent(struct hist_entry *he)
1314 {
1315 u64 total = hists__total_period(he->hists);
1316
1317 return 100.0 * he->stat.period / total;
1318 }
1319
1320 static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
1321 struct perf_hpp *hpp, struct hist_entry *he)
1322 {
1323 struct diff_hpp_fmt *dfmt =
1324 container_of(fmt, struct diff_hpp_fmt, fmt);
1325 double percent = baseline_percent(he);
1326 char pfmt[20] = " ";
1327
1328 if (!he->dummy) {
1329 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
1330 return percent_color_snprintf(hpp->buf, hpp->size,
1331 pfmt, percent);
1332 } else
1333 return scnprintf(hpp->buf, hpp->size, "%*s",
1334 dfmt->header_width, pfmt);
1335 }
1336
1337 static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
1338 {
1339 double percent = baseline_percent(he);
1340 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
1341 int ret = 0;
1342
1343 if (!he->dummy)
1344 ret = scnprintf(buf, size, fmt, percent);
1345
1346 return ret;
1347 }
1348
1349 static int cycles_printf(struct hist_entry *he, struct hist_entry *pair,
1350 struct perf_hpp *hpp, int width)
1351 {
1352 struct block_hist *bh = container_of(he, struct block_hist, he);
1353 struct block_hist *bh_pair = container_of(pair, struct block_hist, he);
1354 struct hist_entry *block_he;
1355 struct block_info *bi;
1356 char buf[128];
1357 char *start_line, *end_line;
1358
1359 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1360 if (!block_he) {
1361 hpp->skip = true;
1362 return 0;
1363 }
1364
1365 /*
1366 * Avoid printing the warning "addr2line_init failed for ..."
1367 */
1368 symbol_conf.disable_add2line_warn = true;
1369
1370 bi = block_he->block_info;
1371
1372 start_line = map__srcline(he->ms.map, bi->sym->start + bi->start,
1373 he->ms.sym);
1374
1375 end_line = map__srcline(he->ms.map, bi->sym->start + bi->end,
1376 he->ms.sym);
1377
1378 if ((strncmp(start_line, SRCLINE_UNKNOWN, strlen(SRCLINE_UNKNOWN)) != 0) &&
1379 (strncmp(end_line, SRCLINE_UNKNOWN, strlen(SRCLINE_UNKNOWN)) != 0)) {
1380 scnprintf(buf, sizeof(buf), "[%s -> %s] %4ld",
1381 start_line, end_line, block_he->diff.cycles);
1382 } else {
1383 scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld",
1384 bi->start, bi->end, block_he->diff.cycles);
1385 }
1386
1387 free_srcline(start_line);
1388 free_srcline(end_line);
1389
1390 return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
1391 }
1392
1393 static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
1394 struct perf_hpp *hpp, struct hist_entry *he,
1395 int comparison_method)
1396 {
1397 struct diff_hpp_fmt *dfmt =
1398 container_of(fmt, struct diff_hpp_fmt, fmt);
1399 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1400 double diff;
1401 s64 wdiff;
1402 char pfmt[20] = " ";
1403
1404 if (!pair) {
1405 if (comparison_method == COMPUTE_CYCLES) {
1406 struct block_hist *bh;
1407
1408 bh = container_of(he, struct block_hist, he);
1409 if (bh->block_idx)
1410 hpp->skip = true;
1411 }
1412
1413 goto no_print;
1414 }
1415
1416 switch (comparison_method) {
1417 case COMPUTE_DELTA:
1418 if (pair->diff.computed)
1419 diff = pair->diff.period_ratio_delta;
1420 else
1421 diff = compute_delta(he, pair);
1422
1423 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
1424 return percent_color_snprintf(hpp->buf, hpp->size,
1425 pfmt, diff);
1426 case COMPUTE_RATIO:
1427 if (he->dummy)
1428 goto dummy_print;
1429 if (pair->diff.computed)
1430 diff = pair->diff.period_ratio;
1431 else
1432 diff = compute_ratio(he, pair);
1433
1434 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
1435 return value_color_snprintf(hpp->buf, hpp->size,
1436 pfmt, diff);
1437 case COMPUTE_WEIGHTED_DIFF:
1438 if (he->dummy)
1439 goto dummy_print;
1440 if (pair->diff.computed)
1441 wdiff = pair->diff.wdiff;
1442 else
1443 wdiff = compute_wdiff(he, pair);
1444
1445 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
1446 return color_snprintf(hpp->buf, hpp->size,
1447 get_percent_color(wdiff),
1448 pfmt, wdiff);
1449 case COMPUTE_CYCLES:
1450 return cycles_printf(he, pair, hpp, dfmt->header_width);
1451 default:
1452 BUG_ON(1);
1453 }
1454 dummy_print:
1455 return scnprintf(hpp->buf, hpp->size, "%*s",
1456 dfmt->header_width, "N/A");
1457 no_print:
1458 return scnprintf(hpp->buf, hpp->size, "%*s",
1459 dfmt->header_width, pfmt);
1460 }
1461
1462 static int hpp__color_delta(struct perf_hpp_fmt *fmt,
1463 struct perf_hpp *hpp, struct hist_entry *he)
1464 {
1465 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
1466 }
1467
1468 static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
1469 struct perf_hpp *hpp, struct hist_entry *he)
1470 {
1471 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
1472 }
1473
1474 static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
1475 struct perf_hpp *hpp, struct hist_entry *he)
1476 {
1477 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
1478 }
1479
1480 static int hpp__color_cycles(struct perf_hpp_fmt *fmt,
1481 struct perf_hpp *hpp, struct hist_entry *he)
1482 {
1483 return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);
1484 }
1485
1486 static int all_zero(unsigned long *vals, int len)
1487 {
1488 int i;
1489
1490 for (i = 0; i < len; i++)
1491 if (vals[i] != 0)
1492 return 0;
1493 return 1;
1494 }
1495
1496 static int print_cycles_spark(char *bf, int size, unsigned long *svals, u64 n)
1497 {
1498 int printed;
1499
1500 if (n <= 1)
1501 return 0;
1502
1503 if (n > NUM_SPARKS)
1504 n = NUM_SPARKS;
1505 if (all_zero(svals, n))
1506 return 0;
1507
1508 printed = print_spark(bf, size, svals, n);
1509 printed += scnprintf(bf + printed, size - printed, " ");
1510 return printed;
1511 }
1512
1513 static int hpp__color_cycles_hist(struct perf_hpp_fmt *fmt,
1514 struct perf_hpp *hpp, struct hist_entry *he)
1515 {
1516 struct diff_hpp_fmt *dfmt =
1517 container_of(fmt, struct diff_hpp_fmt, fmt);
1518 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1519 struct block_hist *bh = container_of(he, struct block_hist, he);
1520 struct block_hist *bh_pair;
1521 struct hist_entry *block_he;
1522 char spark[32], buf[128];
1523 double r;
1524 int ret, pad;
1525
1526 if (!pair) {
1527 if (bh->block_idx)
1528 hpp->skip = true;
1529
1530 goto no_print;
1531 }
1532
1533 bh_pair = container_of(pair, struct block_hist, he);
1534
1535 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1536 if (!block_he) {
1537 hpp->skip = true;
1538 goto no_print;
1539 }
1540
1541 ret = print_cycles_spark(spark, sizeof(spark), block_he->diff.svals,
1542 block_he->diff.stats.n);
1543
1544 r = rel_stddev_stats(stddev_stats(&block_he->diff.stats),
1545 avg_stats(&block_he->diff.stats));
1546
1547 if (ret) {
1548 /*
1549 * Padding spaces if number of sparks less than NUM_SPARKS
1550 * otherwise the output is not aligned.
1551 */
1552 pad = NUM_SPARKS - ((ret - 1) / 3);
1553 scnprintf(buf, sizeof(buf), "%s%5.1f%% %s", "\u00B1", r, spark);
1554 ret = scnprintf(hpp->buf, hpp->size, "%*s",
1555 dfmt->header_width, buf);
1556
1557 if (pad) {
1558 ret += scnprintf(hpp->buf + ret, hpp->size - ret,
1559 "%-*s", pad, " ");
1560 }
1561
1562 return ret;
1563 }
1564
1565 no_print:
1566 return scnprintf(hpp->buf, hpp->size, "%*s",
1567 dfmt->header_width, " ");
1568 }
1569
1570 static void
1571 hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
1572 {
1573 switch (idx) {
1574 case PERF_HPP_DIFF__PERIOD_BASELINE:
1575 scnprintf(buf, size, "%" PRIu64, he->stat.period);
1576 break;
1577
1578 default:
1579 break;
1580 }
1581 }
1582
1583 static void
1584 hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
1585 int idx, char *buf, size_t size)
1586 {
1587 double diff;
1588 double ratio;
1589 s64 wdiff;
1590
1591 switch (idx) {
1592 case PERF_HPP_DIFF__DELTA:
1593 case PERF_HPP_DIFF__DELTA_ABS:
1594 if (pair->diff.computed)
1595 diff = pair->diff.period_ratio_delta;
1596 else
1597 diff = compute_delta(he, pair);
1598
1599 scnprintf(buf, size, "%+4.2F%%", diff);
1600 break;
1601
1602 case PERF_HPP_DIFF__RATIO:
1603 /* No point for ratio number if we are dummy.. */
1604 if (he->dummy) {
1605 scnprintf(buf, size, "N/A");
1606 break;
1607 }
1608
1609 if (pair->diff.computed)
1610 ratio = pair->diff.period_ratio;
1611 else
1612 ratio = compute_ratio(he, pair);
1613
1614 if (ratio > 0.0)
1615 scnprintf(buf, size, "%14.6F", ratio);
1616 break;
1617
1618 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1619 /* No point for wdiff number if we are dummy.. */
1620 if (he->dummy) {
1621 scnprintf(buf, size, "N/A");
1622 break;
1623 }
1624
1625 if (pair->diff.computed)
1626 wdiff = pair->diff.wdiff;
1627 else
1628 wdiff = compute_wdiff(he, pair);
1629
1630 if (wdiff != 0)
1631 scnprintf(buf, size, "%14ld", wdiff);
1632 break;
1633
1634 case PERF_HPP_DIFF__FORMULA:
1635 formula_fprintf(he, pair, buf, size);
1636 break;
1637
1638 case PERF_HPP_DIFF__PERIOD:
1639 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1640 break;
1641
1642 default:
1643 BUG_ON(1);
1644 }
1645 }
1646
1647 static void
1648 __hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1649 char *buf, size_t size)
1650 {
1651 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1652 int idx = dfmt->idx;
1653
1654 /* baseline is special */
1655 if (idx == PERF_HPP_DIFF__BASELINE)
1656 hpp__entry_baseline(he, buf, size);
1657 else {
1658 if (pair)
1659 hpp__entry_pair(he, pair, idx, buf, size);
1660 else
1661 hpp__entry_unpair(he, idx, buf, size);
1662 }
1663 }
1664
1665 static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1666 struct hist_entry *he)
1667 {
1668 struct diff_hpp_fmt *dfmt =
1669 container_of(_fmt, struct diff_hpp_fmt, fmt);
1670 char buf[MAX_COL_WIDTH] = " ";
1671
1672 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1673
1674 if (symbol_conf.field_sep)
1675 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1676 else
1677 return scnprintf(hpp->buf, hpp->size, "%*s",
1678 dfmt->header_width, buf);
1679 }
1680
1681 static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
1682 struct hists *hists __maybe_unused,
1683 int line __maybe_unused,
1684 int *span __maybe_unused)
1685 {
1686 struct diff_hpp_fmt *dfmt =
1687 container_of(fmt, struct diff_hpp_fmt, fmt);
1688
1689 BUG_ON(!dfmt->header);
1690 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1691 }
1692
1693 static int hpp__width(struct perf_hpp_fmt *fmt,
1694 struct perf_hpp *hpp __maybe_unused,
1695 struct hists *hists __maybe_unused)
1696 {
1697 struct diff_hpp_fmt *dfmt =
1698 container_of(fmt, struct diff_hpp_fmt, fmt);
1699
1700 BUG_ON(dfmt->header_width <= 0);
1701 return dfmt->header_width;
1702 }
1703
1704 static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1705 {
1706 #define MAX_HEADER_NAME 100
1707 char buf_indent[MAX_HEADER_NAME];
1708 char buf[MAX_HEADER_NAME];
1709 const char *header = NULL;
1710 int width = 0;
1711
1712 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1713 header = columns[dfmt->idx].name;
1714 width = columns[dfmt->idx].width;
1715
1716 /* Only our defined HPP fmts should appear here. */
1717 BUG_ON(!header);
1718
1719 if (data__files_cnt > 2)
1720 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
1721
1722 #define NAME (data__files_cnt > 2 ? buf : header)
1723 dfmt->header_width = width;
1724 width = (int) strlen(NAME);
1725 if (dfmt->header_width < width)
1726 dfmt->header_width = width;
1727
1728 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1729 dfmt->header_width, NAME);
1730
1731 dfmt->header = strdup(buf_indent);
1732 #undef MAX_HEADER_NAME
1733 #undef NAME
1734 }
1735
1736 static void data__hpp_register(struct data__file *d, int idx)
1737 {
1738 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1739 struct perf_hpp_fmt *fmt = &dfmt->fmt;
1740
1741 dfmt->idx = idx;
1742
1743 fmt->header = hpp__header;
1744 fmt->width = hpp__width;
1745 fmt->entry = hpp__entry_global;
1746 fmt->cmp = hist_entry__cmp_nop;
1747 fmt->collapse = hist_entry__cmp_nop;
1748
1749 /* TODO more colors */
1750 switch (idx) {
1751 case PERF_HPP_DIFF__BASELINE:
1752 fmt->color = hpp__color_baseline;
1753 fmt->sort = hist_entry__cmp_baseline;
1754 break;
1755 case PERF_HPP_DIFF__DELTA:
1756 fmt->color = hpp__color_delta;
1757 fmt->sort = hist_entry__cmp_delta;
1758 break;
1759 case PERF_HPP_DIFF__RATIO:
1760 fmt->color = hpp__color_ratio;
1761 fmt->sort = hist_entry__cmp_ratio;
1762 break;
1763 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1764 fmt->color = hpp__color_wdiff;
1765 fmt->sort = hist_entry__cmp_wdiff;
1766 break;
1767 case PERF_HPP_DIFF__DELTA_ABS:
1768 fmt->color = hpp__color_delta;
1769 fmt->sort = hist_entry__cmp_delta_abs;
1770 break;
1771 case PERF_HPP_DIFF__CYCLES:
1772 fmt->color = hpp__color_cycles;
1773 fmt->sort = hist_entry__cmp_nop;
1774 break;
1775 case PERF_HPP_DIFF__CYCLES_HIST:
1776 fmt->color = hpp__color_cycles_hist;
1777 fmt->sort = hist_entry__cmp_nop;
1778 break;
1779 default:
1780 fmt->sort = hist_entry__cmp_nop;
1781 break;
1782 }
1783
1784 init_header(d, dfmt);
1785 perf_hpp__column_register(fmt);
1786 perf_hpp__register_sort_field(fmt);
1787 }
1788
1789 static int ui_init(void)
1790 {
1791 struct data__file *d;
1792 struct perf_hpp_fmt *fmt;
1793 int i;
1794
1795 data__for_each_file(i, d) {
1796
1797 /*
1798 * Baseline or compute realted columns:
1799 *
1800 * PERF_HPP_DIFF__BASELINE
1801 * PERF_HPP_DIFF__DELTA
1802 * PERF_HPP_DIFF__RATIO
1803 * PERF_HPP_DIFF__WEIGHTED_DIFF
1804 * PERF_HPP_DIFF__CYCLES
1805 */
1806 data__hpp_register(d, i ? compute_2_hpp[compute] :
1807 PERF_HPP_DIFF__BASELINE);
1808
1809 if (cycles_hist && i)
1810 data__hpp_register(d, PERF_HPP_DIFF__CYCLES_HIST);
1811
1812 /*
1813 * And the rest:
1814 *
1815 * PERF_HPP_DIFF__FORMULA
1816 * PERF_HPP_DIFF__PERIOD
1817 * PERF_HPP_DIFF__PERIOD_BASELINE
1818 */
1819 if (show_formula && i)
1820 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1821
1822 if (show_period)
1823 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1824 PERF_HPP_DIFF__PERIOD_BASELINE);
1825 }
1826
1827 if (!sort_compute)
1828 return 0;
1829
1830 /*
1831 * Prepend an fmt to sort on columns at 'sort_compute' first.
1832 * This fmt is added only to the sort list but not to the
1833 * output fields list.
1834 *
1835 * Note that this column (data) can be compared twice - one
1836 * for this 'sort_compute' fmt and another for the normal
1837 * diff_hpp_fmt. But it shouldn't a problem as most entries
1838 * will be sorted out by first try or baseline and comparing
1839 * is not a costly operation.
1840 */
1841 fmt = zalloc(sizeof(*fmt));
1842 if (fmt == NULL) {
1843 pr_err("Memory allocation failed\n");
1844 return -1;
1845 }
1846
1847 fmt->cmp = hist_entry__cmp_nop;
1848 fmt->collapse = hist_entry__cmp_nop;
1849
1850 switch (compute) {
1851 case COMPUTE_DELTA:
1852 fmt->sort = hist_entry__cmp_delta_idx;
1853 break;
1854 case COMPUTE_RATIO:
1855 fmt->sort = hist_entry__cmp_ratio_idx;
1856 break;
1857 case COMPUTE_WEIGHTED_DIFF:
1858 fmt->sort = hist_entry__cmp_wdiff_idx;
1859 break;
1860 case COMPUTE_DELTA_ABS:
1861 fmt->sort = hist_entry__cmp_delta_abs_idx;
1862 break;
1863 case COMPUTE_CYCLES:
1864 /*
1865 * Should set since 'fmt->sort' is called without
1866 * checking valid during sorting
1867 */
1868 fmt->sort = hist_entry__cmp_nop;
1869 break;
1870 default:
1871 BUG_ON(1);
1872 }
1873
1874 perf_hpp__prepend_sort_field(fmt);
1875 return 0;
1876 }
1877
1878 static int data_init(int argc, const char **argv)
1879 {
1880 struct data__file *d;
1881 static const char *defaults[] = {
1882 "perf.data.old",
1883 "perf.data",
1884 };
1885 bool use_default = true;
1886 int i;
1887
1888 data__files_cnt = 2;
1889
1890 if (argc) {
1891 if (argc == 1)
1892 defaults[1] = argv[0];
1893 else {
1894 data__files_cnt = argc;
1895 use_default = false;
1896 }
1897 } else if (perf_guest) {
1898 defaults[0] = "perf.data.host";
1899 defaults[1] = "perf.data.guest";
1900 }
1901
1902 if (sort_compute >= (unsigned int) data__files_cnt) {
1903 pr_err("Order option out of limit.\n");
1904 return -EINVAL;
1905 }
1906
1907 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1908 if (!data__files)
1909 return -ENOMEM;
1910
1911 data__for_each_file(i, d) {
1912 struct perf_data *data = &d->data;
1913
1914 data->path = use_default ? defaults[i] : argv[i];
1915 data->mode = PERF_DATA_MODE_READ,
1916 data->force = force,
1917
1918 d->idx = i;
1919 }
1920
1921 return 0;
1922 }
1923
1924 static int diff__config(const char *var, const char *value,
1925 void *cb __maybe_unused)
1926 {
1927 if (!strcmp(var, "diff.order")) {
1928 int ret;
1929 if (perf_config_int(&ret, var, value) < 0)
1930 return -1;
1931 sort_compute = ret;
1932 return 0;
1933 }
1934 if (!strcmp(var, "diff.compute")) {
1935 if (!strcmp(value, "delta")) {
1936 compute = COMPUTE_DELTA;
1937 } else if (!strcmp(value, "delta-abs")) {
1938 compute = COMPUTE_DELTA_ABS;
1939 } else if (!strcmp(value, "ratio")) {
1940 compute = COMPUTE_RATIO;
1941 } else if (!strcmp(value, "wdiff")) {
1942 compute = COMPUTE_WEIGHTED_DIFF;
1943 } else {
1944 pr_err("Invalid compute method: %s\n", value);
1945 return -1;
1946 }
1947 }
1948
1949 return 0;
1950 }
1951
1952 int cmd_diff(int argc, const char **argv)
1953 {
1954 int ret = hists__init();
1955
1956 if (ret < 0)
1957 return ret;
1958
1959 perf_config(diff__config, NULL);
1960
1961 argc = parse_options(argc, argv, options, diff_usage, 0);
1962
1963 if (quiet)
1964 perf_quiet_option();
1965
1966 if (cycles_hist && (compute != COMPUTE_CYCLES))
1967 usage_with_options(diff_usage, options);
1968
1969 if (pdiff.stream)
1970 compute = COMPUTE_STREAM;
1971
1972 symbol__annotation_init();
1973
1974 if (symbol__init(NULL) < 0)
1975 return -1;
1976
1977 if (data_init(argc, argv) < 0)
1978 return -1;
1979
1980 if (check_file_brstack() < 0)
1981 return -1;
1982
1983 if ((compute == COMPUTE_CYCLES || compute == COMPUTE_STREAM)
1984 && !pdiff.has_br_stack) {
1985 return -1;
1986 }
1987
1988 if (compute == COMPUTE_STREAM) {
1989 symbol_conf.show_branchflag_count = true;
1990 symbol_conf.disable_add2line_warn = true;
1991 callchain_param.mode = CHAIN_FLAT;
1992 callchain_param.key = CCKEY_SRCLINE;
1993 callchain_param.branch_callstack = 1;
1994 symbol_conf.use_callchain = true;
1995 callchain_register_param(&callchain_param);
1996 sort_order = "srcline,symbol,dso";
1997 } else {
1998 if (ui_init() < 0)
1999 return -1;
2000
2001 sort__mode = SORT_MODE__DIFF;
2002 }
2003
2004 if (setup_sorting(NULL) < 0)
2005 usage_with_options(diff_usage, options);
2006
2007 setup_pager();
2008
2009 sort__setup_elide(NULL);
2010
2011 return __cmd_diff();
2012 }
Linux with added FPC-III support