1 // SPDX-License-Identifier: GPL-2.0
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.
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"
26 #include <linux/err.h>
27 #include <linux/zalloc.h>
28 #include <subcmd/pager.h>
29 #include <subcmd/parse-options.h>
37 struct perf_tool tool;
39 struct perf_time_interval *ptime_range;
45 /* Diff command specific HPP columns. */
47 PERF_HPP_DIFF__BASELINE,
48 PERF_HPP_DIFF__PERIOD,
49 PERF_HPP_DIFF__PERIOD_BASELINE,
52 PERF_HPP_DIFF__WEIGHTED_DIFF,
53 PERF_HPP_DIFF__FORMULA,
54 PERF_HPP_DIFF__DELTA_ABS,
55 PERF_HPP_DIFF__CYCLES,
57 PERF_HPP_DIFF__MAX_INDEX
61 struct perf_hpp_fmt fmt;
68 struct perf_session *session;
69 struct perf_data data;
72 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
75 static struct data__file *data__files;
76 static int data__files_cnt;
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])
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)
87 static bool show_period;
88 static bool show_formula;
89 static bool show_baseline_only;
90 static unsigned int sort_compute = 1;
92 static s64 compute_wdiff_w1;
93 static s64 compute_wdiff_w2;
95 static const char *cpu_list;
96 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
98 static struct addr_location dummy_al;
103 COMPUTE_WEIGHTED_DIFF,
109 const 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",
117 static int compute = COMPUTE_DELTA_ABS;
119 static 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,
127 #define MAX_COL_WIDTH 70
129 static struct header_column {
132 } columns[PERF_HPP_DIFF__MAX_INDEX] = {
133 [PERF_HPP_DIFF__BASELINE] = {
136 [PERF_HPP_DIFF__PERIOD] = {
140 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
141 .name = "Base period",
144 [PERF_HPP_DIFF__DELTA] = {
148 [PERF_HPP_DIFF__DELTA_ABS] = {
152 [PERF_HPP_DIFF__RATIO] = {
156 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
157 .name = "Weighted diff",
160 [PERF_HPP_DIFF__FORMULA] = {
162 .width = MAX_COL_WIDTH,
164 [PERF_HPP_DIFF__CYCLES] = {
165 .name = "[Program Block Range] Cycles Diff",
170 static int setup_compute_opt_wdiff(char *opt)
180 w2_str = strchr(opt, ',');
188 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
189 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
191 if (!compute_wdiff_w1 || !compute_wdiff_w2)
194 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
195 compute_wdiff_w1, compute_wdiff_w2);
201 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
206 static int setup_compute_opt(char *opt)
208 if (compute == COMPUTE_WEIGHTED_DIFF)
209 return setup_compute_opt_wdiff(opt);
212 pr_err("Failed: extra option specified '%s'", opt);
219 static int setup_compute(const struct option *opt, const char *str,
220 int unset __maybe_unused)
222 int *cp = (int *) opt->value;
223 char *cstr = (char *) str;
233 option = strchr(str, ':');
235 unsigned len = option++ - str;
238 * The str data are not writeable, so we need
239 * to use another buffer.
242 /* No option value is longer. */
243 if (len >= sizeof(buf))
246 strncpy(buf, str, len);
251 for (i = 0; i < COMPUTE_MAX; i++)
252 if (!strcmp(cstr, compute_names[i])) {
254 return setup_compute_opt(option);
257 pr_err("Failed: '%s' is not computation method "
258 "(use 'delta','ratio' or 'wdiff')\n", str);
262 static double period_percent(struct hist_entry *he, u64 period)
264 u64 total = hists__total_period(he->hists);
266 return (period * 100.0) / total;
269 static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
271 double old_percent = period_percent(he, he->stat.period);
272 double new_percent = period_percent(pair, pair->stat.period);
274 pair->diff.period_ratio_delta = new_percent - old_percent;
275 pair->diff.computed = true;
276 return pair->diff.period_ratio_delta;
279 static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
281 double old_period = he->stat.period ?: 1;
282 double new_period = pair->stat.period;
284 pair->diff.computed = true;
285 pair->diff.period_ratio = new_period / old_period;
286 return pair->diff.period_ratio;
289 static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
291 u64 old_period = he->stat.period;
292 u64 new_period = pair->stat.period;
294 pair->diff.computed = true;
295 pair->diff.wdiff = new_period * compute_wdiff_w2 -
296 old_period * compute_wdiff_w1;
298 return pair->diff.wdiff;
301 static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
302 char *buf, size_t size)
304 u64 he_total = he->hists->stats.total_period;
305 u64 pair_total = pair->hists->stats.total_period;
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;
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);
318 static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
319 char *buf, size_t size)
321 double old_period = he->stat.period;
322 double new_period = pair->stat.period;
324 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
327 static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
328 char *buf, size_t size)
330 u64 old_period = he->stat.period;
331 u64 new_period = pair->stat.period;
333 return scnprintf(buf, size,
334 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
335 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
338 static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
339 char *buf, size_t size)
343 case COMPUTE_DELTA_ABS:
344 return formula_delta(he, pair, buf, size);
346 return formula_ratio(he, pair, buf, size);
347 case COMPUTE_WEIGHTED_DIFF:
348 return formula_wdiff(he, pair, buf, size);
356 static void *block_hist_zalloc(size_t size)
358 struct block_hist *bh;
360 bh = zalloc(size + sizeof(*bh));
367 static void block_hist_free(void *he)
369 struct block_hist *bh;
371 bh = container_of(he, struct block_hist, he);
372 hists__delete_entries(&bh->block_hists);
376 struct hist_entry_ops block_hist_ops = {
377 .new = block_hist_zalloc,
378 .free = block_hist_free,
381 static int diff__process_sample_event(struct perf_tool *tool,
382 union perf_event *event,
383 struct perf_sample *sample,
385 struct machine *machine)
387 struct perf_diff *pdiff = container_of(tool, struct perf_diff, tool);
388 struct addr_location al;
389 struct hists *hists = evsel__hists(evsel);
392 if (perf_time__ranges_skip_sample(pdiff->ptime_range, pdiff->range_num,
397 if (machine__resolve(machine, &al, sample) < 0) {
398 pr_warning("problem processing %d event, skipping it.\n",
403 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) {
408 if (compute != COMPUTE_CYCLES) {
409 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample,
411 pr_warning("problem incrementing symbol period, "
416 if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
417 NULL, NULL, sample, true)) {
418 pr_warning("problem incrementing symbol period, "
423 hist__account_cycles(sample->branch_stack, &al, sample, false);
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.
432 hists->stats.total_period += sample->period;
434 hists->stats.total_non_filtered_period += sample->period;
437 addr_location__put(&al);
441 static struct perf_diff pdiff = {
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,
456 static struct evsel *evsel_match(struct evsel *evsel,
457 struct evlist *evlist)
461 evlist__for_each_entry(evlist, e) {
462 if (perf_evsel__match2(evsel, e))
469 static void perf_evlist__collapse_resort(struct evlist *evlist)
473 evlist__for_each_entry(evlist, evsel) {
474 struct hists *hists = evsel__hists(evsel);
476 hists__collapse_resort(hists, NULL);
480 static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)
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);
489 static struct hist_entry*
490 get_pair_data(struct hist_entry *he, struct data__file *d)
492 if (hist_entry__has_pairs(he)) {
493 struct hist_entry *pair;
495 list_for_each_entry(pair, &he->pairs.head, pairs.node)
496 if (pair->hists == d->hists)
503 static struct hist_entry*
504 get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
506 struct data__file *d = fmt_to_data_file(&dfmt->fmt);
508 return get_pair_data(he, d);
511 static void hists__baseline_only(struct hists *hists)
513 struct rb_root_cached *root;
514 struct rb_node *next;
516 if (hists__has(hists, need_collapse))
517 root = &hists->entries_collapsed;
519 root = hists->entries_in;
521 next = rb_first_cached(root);
522 while (next != NULL) {
523 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
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);
533 static int64_t block_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
534 struct hist_entry *left, struct hist_entry *right)
536 struct block_info *bi_l = left->block_info;
537 struct block_info *bi_r = right->block_info;
540 if (!bi_l->sym || !bi_r->sym) {
541 if (!bi_l->sym && !bi_r->sym)
549 if (bi_l->sym == bi_r->sym) {
550 if (bi_l->start == bi_r->start) {
551 if (bi_l->end == bi_r->end)
554 return (int64_t)(bi_r->end - bi_l->end);
556 return (int64_t)(bi_r->start - bi_l->start);
558 cmp = strcmp(bi_l->sym->name, bi_r->sym->name);
562 if (bi_l->sym->start != bi_r->sym->start)
563 return (int64_t)(bi_r->sym->start - bi_l->sym->start);
565 return (int64_t)(bi_r->sym->end - bi_l->sym->end);
568 static int64_t block_cycles_diff_cmp(struct hist_entry *left,
569 struct hist_entry *right)
571 bool pairs_left = hist_entry__has_pairs(left);
572 bool pairs_right = hist_entry__has_pairs(right);
575 if (!pairs_left && !pairs_right)
578 l = labs(left->diff.cycles);
579 r = labs(right->diff.cycles);
583 static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused,
584 struct hist_entry *left, struct hist_entry *right)
586 return block_cycles_diff_cmp(right, left);
589 static void init_block_hist(struct block_hist *bh)
591 __hists__init(&bh->block_hists, &bh->block_list);
592 perf_hpp_list__init(&bh->block_list);
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,
603 static void init_block_info(struct block_info *bi, struct symbol *sym,
604 struct cyc_hist *ch, int offset)
607 bi->start = ch->start;
609 bi->cycles = ch->cycles;
610 bi->cycles_aggr = ch->cycles_aggr;
612 bi->num_aggr = ch->num_aggr;
615 static int process_block_per_sym(struct hist_entry *he)
617 struct annotation *notes;
619 struct block_hist *bh;
621 if (!he->ms.map || !he->ms.sym)
624 notes = symbol__annotation(he->ms.sym);
625 if (!notes || !notes->src || !notes->src->cycles_hist)
628 bh = container_of(he, struct block_hist, he);
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;
637 bi = block_info__new();
641 init_block_info(bi, he->ms.sym, &ch[i], i);
642 he_block = hists__add_entry_block(&bh->block_hists,
654 static int block_pair_cmp(struct hist_entry *a, struct hist_entry *b)
656 struct block_info *bi_a = a->block_info;
657 struct block_info *bi_b = b->block_info;
660 if (!bi_a->sym || !bi_b->sym)
663 cmp = strcmp(bi_a->sym->name, bi_b->sym->name);
665 if ((!cmp) && (bi_a->start == bi_b->start) && (bi_a->end == bi_b->end))
671 static struct hist_entry *get_block_pair(struct hist_entry *he,
672 struct hists *hists_pair)
674 struct rb_root_cached *root = hists_pair->entries_in;
675 struct rb_node *next = rb_first_cached(root);
678 while (next != NULL) {
679 struct hist_entry *he_pair = rb_entry(next, struct hist_entry,
682 next = rb_next(&he_pair->rb_node_in);
684 cmp = block_pair_cmp(he_pair, he);
692 static void compute_cycles_diff(struct hist_entry *he,
693 struct hist_entry *pair)
695 pair->diff.computed = true;
696 if (pair->block_info->num && he->block_info->num) {
698 pair->block_info->cycles_aggr / pair->block_info->num_aggr -
699 he->block_info->cycles_aggr / he->block_info->num_aggr;
703 static void block_hists_match(struct hists *hists_base,
704 struct hists *hists_pair)
706 struct rb_root_cached *root = hists_base->entries_in;
707 struct rb_node *next = rb_first_cached(root);
709 while (next != NULL) {
710 struct hist_entry *he = rb_entry(next, struct hist_entry,
712 struct hist_entry *pair = get_block_pair(he, hists_pair);
714 next = rb_next(&he->rb_node_in);
717 hist_entry__add_pair(pair, he);
718 compute_cycles_diff(he, pair);
723 static int filter_cb(struct hist_entry *he, void *arg __maybe_unused)
725 /* Skip the calculation of column length in output_resort */
730 static void hists__precompute(struct hists *hists)
732 struct rb_root_cached *root;
733 struct rb_node *next;
735 if (hists__has(hists, need_collapse))
736 root = &hists->entries_collapsed;
738 root = hists->entries_in;
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;
747 he = rb_entry(next, struct hist_entry, rb_node_in);
748 next = rb_next(&he->rb_node_in);
750 if (compute == COMPUTE_CYCLES)
751 process_block_per_sym(he);
753 data__for_each_file_new(i, d) {
754 pair = get_pair_data(he, d);
760 case COMPUTE_DELTA_ABS:
761 compute_delta(he, pair);
764 compute_ratio(he, pair);
766 case COMPUTE_WEIGHTED_DIFF:
767 compute_wdiff(he, pair);
770 process_block_per_sym(pair);
771 bh = container_of(he, struct block_hist, he);
772 pair_bh = container_of(pair, struct block_hist,
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,
789 static int64_t cmp_doubles(double l, double r)
800 __hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
806 double l = left->diff.period_ratio_delta;
807 double r = right->diff.period_ratio_delta;
809 return cmp_doubles(l, r);
811 case COMPUTE_DELTA_ABS:
813 double l = fabs(left->diff.period_ratio_delta);
814 double r = fabs(right->diff.period_ratio_delta);
816 return cmp_doubles(l, r);
820 double l = left->diff.period_ratio;
821 double r = right->diff.period_ratio;
823 return cmp_doubles(l, r);
825 case COMPUTE_WEIGHTED_DIFF:
827 s64 l = left->diff.wdiff;
828 s64 r = right->diff.wdiff;
840 hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
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;
847 if (!pairs_left && !pairs_right)
850 if (!pairs_left || !pairs_right)
851 return pairs_left ? -1 : 1;
853 p_left = get_pair_data(left, &data__files[sort_idx]);
854 p_right = get_pair_data(right, &data__files[sort_idx]);
856 if (!p_left && !p_right)
859 if (!p_left || !p_right)
860 return p_left ? -1 : 1;
863 * We have 2 entries of same kind, let's
864 * make the data comparison.
866 return __hist_entry__cmp_compute(p_left, p_right, c);
870 hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,
873 struct hist_entry *p_right, *p_left;
875 p_left = get_pair_data(left, &data__files[sort_idx]);
876 p_right = get_pair_data(right, &data__files[sort_idx]);
878 if (!p_left && !p_right)
881 if (!p_left || !p_right)
882 return p_left ? -1 : 1;
884 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {
886 * The delta can be computed without the baseline, but
887 * others are not. Put those entries which have no
890 if (left->dummy && right->dummy)
893 if (left->dummy || right->dummy)
894 return left->dummy ? 1 : -1;
897 return __hist_entry__cmp_compute(p_left, p_right, c);
901 hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,
902 struct hist_entry *left __maybe_unused,
903 struct hist_entry *right __maybe_unused)
909 hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
910 struct hist_entry *left, struct hist_entry *right)
912 if (left->stat.period == right->stat.period)
914 return left->stat.period > right->stat.period ? 1 : -1;
918 hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,
919 struct hist_entry *left, struct hist_entry *right)
921 struct data__file *d = fmt_to_data_file(fmt);
923 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);
927 hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,
928 struct hist_entry *left, struct hist_entry *right)
930 struct data__file *d = fmt_to_data_file(fmt);
932 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);
936 hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,
937 struct hist_entry *left, struct hist_entry *right)
939 struct data__file *d = fmt_to_data_file(fmt);
941 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);
945 hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,
946 struct hist_entry *left, struct hist_entry *right)
948 struct data__file *d = fmt_to_data_file(fmt);
950 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);
954 hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,
955 struct hist_entry *left, struct hist_entry *right)
957 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,
962 hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,
963 struct hist_entry *left, struct hist_entry *right)
965 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,
970 hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,
971 struct hist_entry *left, struct hist_entry *right)
973 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,
978 hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,
979 struct hist_entry *left, struct hist_entry *right)
981 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,
985 static void hists__process(struct hists *hists)
987 if (show_baseline_only)
988 hists__baseline_only(hists);
990 hists__precompute(hists);
991 hists__output_resort(hists, NULL);
993 if (compute == COMPUTE_CYCLES)
994 symbol_conf.report_block = true;
996 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,
997 !symbol_conf.use_callchain);
1000 static void data__fprintf(void)
1002 struct data__file *d;
1005 fprintf(stdout, "# Data files:\n");
1007 data__for_each_file(i, d)
1008 fprintf(stdout, "# [%d] %s %s\n",
1009 d->idx, d->data.path,
1010 !d->idx ? "(Baseline)" : "");
1012 fprintf(stdout, "#\n");
1015 static void data_process(void)
1017 struct evlist *evlist_base = data__files[0].session->evlist;
1018 struct evsel *evsel_base;
1021 evlist__for_each_entry(evlist_base, evsel_base) {
1022 struct hists *hists_base = evsel__hists(evsel_base);
1023 struct data__file *d;
1026 data__for_each_file_new(i, d) {
1027 struct evlist *evlist = d->session->evlist;
1028 struct evsel *evsel;
1029 struct hists *hists;
1031 evsel = evsel_match(evsel_base, evlist);
1035 hists = evsel__hists(evsel);
1038 hists__match(hists_base, hists);
1040 if (!show_baseline_only)
1041 hists__link(hists_base, hists);
1045 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
1046 perf_evsel__name(evsel_base));
1051 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
1054 /* Don't sort callchain for perf diff */
1055 perf_evsel__reset_sample_bit(evsel_base, CALLCHAIN);
1057 hists__process(hists_base);
1061 static void data__free(struct data__file *d)
1065 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
1066 struct diff_hpp_fmt *fmt = &d->fmt[col];
1068 zfree(&fmt->header);
1072 static int abstime_str_dup(char **pstr)
1076 if (pdiff.time_str && strchr(pdiff.time_str, ':')) {
1077 str = strdup(pdiff.time_str);
1086 static int parse_absolute_time(struct data__file *d, char **pstr)
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
1095 p = strchr(*pstr, ':');
1098 pr_err("Invalid time string\n");
1105 pr_err("Invalid time string\n");
1110 ret = perf_time__parse_for_ranges(*pstr, d->session,
1125 static int parse_percent_time(struct data__file *d)
1129 ret = perf_time__parse_for_ranges(pdiff.time_str, d->session,
1136 static int parse_time_str(struct data__file *d, char *abstime_ostr,
1137 char **pabstime_tmp)
1142 ret = parse_absolute_time(d, pabstime_tmp);
1143 else if (pdiff.time_str)
1144 ret = parse_percent_time(d);
1149 static int check_file_brstack(void)
1151 struct data__file *d;
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);
1162 has_br_stack = perf_header__has_feat(&d->session->header,
1163 HEADER_BRANCH_STACK);
1164 perf_session__delete(d->session);
1169 /* Set only all files having branch stacks */
1170 pdiff.has_br_stack = true;
1174 static int __cmd_diff(void)
1176 struct data__file *d;
1178 char *abstime_ostr, *abstime_tmp;
1180 ret = abstime_str_dup(&abstime_ostr);
1184 abstime_tmp = abstime_ostr;
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);
1195 if (pdiff.time_str) {
1196 ret = parse_time_str(d, abstime_ostr, &abstime_tmp);
1202 ret = perf_session__cpu_bitmap(d->session, cpu_list,
1208 ret = perf_session__process_events(d->session);
1210 pr_err("Failed to process %s\n", d->data.path);
1214 perf_evlist__collapse_resort(d->session->evlist);
1216 if (pdiff.ptime_range)
1217 zfree(&pdiff.ptime_range);
1223 data__for_each_file(i, d) {
1224 perf_session__delete(d->session);
1230 if (pdiff.ptime_range)
1231 zfree(&pdiff.ptime_range);
1239 static const char * const diff_usage[] = {
1240 "perf diff [<options>] [old_file] [new_file]",
1244 static 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",
1254 OPT_BOOLEAN('p', "period", &show_period,
1255 "Show period values."),
1256 OPT_BOOLEAN('F', "formula", &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"),
1293 static double baseline_percent(struct hist_entry *he)
1295 u64 total = hists__total_period(he->hists);
1297 return 100.0 * he->stat.period / total;
1300 static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
1301 struct perf_hpp *hpp, struct hist_entry *he)
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] = " ";
1309 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
1310 return percent_color_snprintf(hpp->buf, hpp->size,
1313 return scnprintf(hpp->buf, hpp->size, "%*s",
1314 dfmt->header_width, pfmt);
1317 static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
1319 double percent = baseline_percent(he);
1320 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
1324 ret = scnprintf(buf, size, fmt, percent);
1329 static int cycles_printf(struct hist_entry *he, struct hist_entry *pair,
1330 struct perf_hpp *hpp, int width)
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;
1337 char *start_line, *end_line;
1339 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);
1346 * Avoid printing the warning "addr2line_init failed for ..."
1348 symbol_conf.disable_add2line_warn = true;
1350 bi = block_he->block_info;
1352 start_line = map__srcline(he->ms.map, bi->sym->start + bi->start,
1355 end_line = map__srcline(he->ms.map, bi->sym->start + bi->end,
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);
1362 scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld",
1363 bi->start, bi->end, block_he->diff.cycles);
1366 free_srcline(start_line);
1367 free_srcline(end_line);
1369 return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
1372 static int __hpp__color_compare(struct perf_hpp_fmt *fmt,
1373 struct perf_hpp *hpp, struct hist_entry *he,
1374 int comparison_method)
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);
1381 char pfmt[20] = " ";
1384 if (comparison_method == COMPUTE_CYCLES) {
1385 struct block_hist *bh;
1387 bh = container_of(he, struct block_hist, he);
1395 switch (comparison_method) {
1397 if (pair->diff.computed)
1398 diff = pair->diff.period_ratio_delta;
1400 diff = compute_delta(he, pair);
1402 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
1403 return percent_color_snprintf(hpp->buf, hpp->size,
1408 if (pair->diff.computed)
1409 diff = pair->diff.period_ratio;
1411 diff = compute_ratio(he, pair);
1413 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);
1414 return value_color_snprintf(hpp->buf, hpp->size,
1416 case COMPUTE_WEIGHTED_DIFF:
1419 if (pair->diff.computed)
1420 wdiff = pair->diff.wdiff;
1422 wdiff = compute_wdiff(he, pair);
1424 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);
1425 return color_snprintf(hpp->buf, hpp->size,
1426 get_percent_color(wdiff),
1428 case COMPUTE_CYCLES:
1429 return cycles_printf(he, pair, hpp, dfmt->header_width);
1434 return scnprintf(hpp->buf, hpp->size, "%*s",
1435 dfmt->header_width, "N/A");
1437 return scnprintf(hpp->buf, hpp->size, "%*s",
1438 dfmt->header_width, pfmt);
1441 static int hpp__color_delta(struct perf_hpp_fmt *fmt,
1442 struct perf_hpp *hpp, struct hist_entry *he)
1444 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);
1447 static int hpp__color_ratio(struct perf_hpp_fmt *fmt,
1448 struct perf_hpp *hpp, struct hist_entry *he)
1450 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);
1453 static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,
1454 struct perf_hpp *hpp, struct hist_entry *he)
1456 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);
1459 static int hpp__color_cycles(struct perf_hpp_fmt *fmt,
1460 struct perf_hpp *hpp, struct hist_entry *he)
1462 return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);
1466 hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
1469 case PERF_HPP_DIFF__PERIOD_BASELINE:
1470 scnprintf(buf, size, "%" PRIu64, he->stat.period);
1479 hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
1480 int idx, char *buf, size_t size)
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;
1492 diff = compute_delta(he, pair);
1494 scnprintf(buf, size, "%+4.2F%%", diff);
1497 case PERF_HPP_DIFF__RATIO:
1498 /* No point for ratio number if we are dummy.. */
1500 scnprintf(buf, size, "N/A");
1504 if (pair->diff.computed)
1505 ratio = pair->diff.period_ratio;
1507 ratio = compute_ratio(he, pair);
1510 scnprintf(buf, size, "%14.6F", ratio);
1513 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1514 /* No point for wdiff number if we are dummy.. */
1516 scnprintf(buf, size, "N/A");
1520 if (pair->diff.computed)
1521 wdiff = pair->diff.wdiff;
1523 wdiff = compute_wdiff(he, pair);
1526 scnprintf(buf, size, "%14ld", wdiff);
1529 case PERF_HPP_DIFF__FORMULA:
1530 formula_fprintf(he, pair, buf, size);
1533 case PERF_HPP_DIFF__PERIOD:
1534 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
1543 __hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
1544 char *buf, size_t size)
1546 struct hist_entry *pair = get_pair_fmt(he, dfmt);
1547 int idx = dfmt->idx;
1549 /* baseline is special */
1550 if (idx == PERF_HPP_DIFF__BASELINE)
1551 hpp__entry_baseline(he, buf, size);
1554 hpp__entry_pair(he, pair, idx, buf, size);
1556 hpp__entry_unpair(he, idx, buf, size);
1560 static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
1561 struct hist_entry *he)
1563 struct diff_hpp_fmt *dfmt =
1564 container_of(_fmt, struct diff_hpp_fmt, fmt);
1565 char buf[MAX_COL_WIDTH] = " ";
1567 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
1569 if (symbol_conf.field_sep)
1570 return scnprintf(hpp->buf, hpp->size, "%s", buf);
1572 return scnprintf(hpp->buf, hpp->size, "%*s",
1573 dfmt->header_width, buf);
1576 static 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)
1581 struct diff_hpp_fmt *dfmt =
1582 container_of(fmt, struct diff_hpp_fmt, fmt);
1584 BUG_ON(!dfmt->header);
1585 return scnprintf(hpp->buf, hpp->size, dfmt->header);
1588 static int hpp__width(struct perf_hpp_fmt *fmt,
1589 struct perf_hpp *hpp __maybe_unused,
1590 struct hists *hists __maybe_unused)
1592 struct diff_hpp_fmt *dfmt =
1593 container_of(fmt, struct diff_hpp_fmt, fmt);
1595 BUG_ON(dfmt->header_width <= 0);
1596 return dfmt->header_width;
1599 static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
1601 #define MAX_HEADER_NAME 100
1602 char buf_indent[MAX_HEADER_NAME];
1603 char buf[MAX_HEADER_NAME];
1604 const char *header = NULL;
1607 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
1608 header = columns[dfmt->idx].name;
1609 width = columns[dfmt->idx].width;
1611 /* Only our defined HPP fmts should appear here. */
1614 if (data__files_cnt > 2)
1615 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
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;
1623 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
1624 dfmt->header_width, NAME);
1626 dfmt->header = strdup(buf_indent);
1627 #undef MAX_HEADER_NAME
1631 static void data__hpp_register(struct data__file *d, int idx)
1633 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
1634 struct perf_hpp_fmt *fmt = &dfmt->fmt;
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;
1644 /* TODO more colors */
1646 case PERF_HPP_DIFF__BASELINE:
1647 fmt->color = hpp__color_baseline;
1648 fmt->sort = hist_entry__cmp_baseline;
1650 case PERF_HPP_DIFF__DELTA:
1651 fmt->color = hpp__color_delta;
1652 fmt->sort = hist_entry__cmp_delta;
1654 case PERF_HPP_DIFF__RATIO:
1655 fmt->color = hpp__color_ratio;
1656 fmt->sort = hist_entry__cmp_ratio;
1658 case PERF_HPP_DIFF__WEIGHTED_DIFF:
1659 fmt->color = hpp__color_wdiff;
1660 fmt->sort = hist_entry__cmp_wdiff;
1662 case PERF_HPP_DIFF__DELTA_ABS:
1663 fmt->color = hpp__color_delta;
1664 fmt->sort = hist_entry__cmp_delta_abs;
1666 case PERF_HPP_DIFF__CYCLES:
1667 fmt->color = hpp__color_cycles;
1668 fmt->sort = hist_entry__cmp_nop;
1671 fmt->sort = hist_entry__cmp_nop;
1675 init_header(d, dfmt);
1676 perf_hpp__column_register(fmt);
1677 perf_hpp__register_sort_field(fmt);
1680 static int ui_init(void)
1682 struct data__file *d;
1683 struct perf_hpp_fmt *fmt;
1686 data__for_each_file(i, d) {
1689 * Baseline or compute realted columns:
1691 * PERF_HPP_DIFF__BASELINE
1692 * PERF_HPP_DIFF__DELTA
1693 * PERF_HPP_DIFF__RATIO
1694 * PERF_HPP_DIFF__WEIGHTED_DIFF
1696 data__hpp_register(d, i ? compute_2_hpp[compute] :
1697 PERF_HPP_DIFF__BASELINE);
1702 * PERF_HPP_DIFF__FORMULA
1703 * PERF_HPP_DIFF__PERIOD
1704 * PERF_HPP_DIFF__PERIOD_BASELINE
1706 if (show_formula && i)
1707 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
1710 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
1711 PERF_HPP_DIFF__PERIOD_BASELINE);
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.
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.
1728 fmt = zalloc(sizeof(*fmt));
1730 pr_err("Memory allocation failed\n");
1734 fmt->cmp = hist_entry__cmp_nop;
1735 fmt->collapse = hist_entry__cmp_nop;
1739 fmt->sort = hist_entry__cmp_delta_idx;
1742 fmt->sort = hist_entry__cmp_ratio_idx;
1744 case COMPUTE_WEIGHTED_DIFF:
1745 fmt->sort = hist_entry__cmp_wdiff_idx;
1747 case COMPUTE_DELTA_ABS:
1748 fmt->sort = hist_entry__cmp_delta_abs_idx;
1750 case COMPUTE_CYCLES:
1752 * Should set since 'fmt->sort' is called without
1753 * checking valid during sorting
1755 fmt->sort = hist_entry__cmp_nop;
1761 perf_hpp__prepend_sort_field(fmt);
1765 static int data_init(int argc, const char **argv)
1767 struct data__file *d;
1768 static const char *defaults[] = {
1772 bool use_default = true;
1775 data__files_cnt = 2;
1779 defaults[1] = argv[0];
1781 data__files_cnt = argc;
1782 use_default = false;
1784 } else if (perf_guest) {
1785 defaults[0] = "perf.data.host";
1786 defaults[1] = "perf.data.guest";
1789 if (sort_compute >= (unsigned int) data__files_cnt) {
1790 pr_err("Order option out of limit.\n");
1794 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1798 data__for_each_file(i, d) {
1799 struct perf_data *data = &d->data;
1801 data->path = use_default ? defaults[i] : argv[i];
1802 data->mode = PERF_DATA_MODE_READ,
1803 data->force = force,
1811 static int diff__config(const char *var, const char *value,
1812 void *cb __maybe_unused)
1814 if (!strcmp(var, "diff.order")) {
1816 if (perf_config_int(&ret, var, value) < 0)
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;
1831 pr_err("Invalid compute method: %s\n", value);
1839 int cmd_diff(int argc, const char **argv)
1841 int ret = hists__init();
1846 perf_config(diff__config, NULL);
1848 argc = parse_options(argc, argv, options, diff_usage, 0);
1851 perf_quiet_option();
1853 symbol__annotation_init();
1855 if (symbol__init(NULL) < 0)
1858 if (data_init(argc, argv) < 0)
1861 if (check_file_brstack() < 0)
1864 if (compute == COMPUTE_CYCLES && !pdiff.has_br_stack)
1870 sort__mode = SORT_MODE__DIFF;
1872 if (setup_sorting(NULL) < 0)
1873 usage_with_options(diff_usage, options);
1877 sort__setup_elide(NULL);
1879 return __cmd_diff();