2014 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * builtin-diff.c4 *5 * Builtin diff command: Analyze two perf.data input files, look up and read6 * DSOs and symbol information, sort them and produce a diff.7 */8#include "builtin.h"9 10#include "util/debug.h"11#include "util/event.h"12#include "util/hist.h"13#include "util/evsel.h"14#include "util/evlist.h"15#include "util/session.h"16#include "util/tool.h"17#include "util/sort.h"18#include "util/srcline.h"19#include "util/symbol.h"20#include "util/data.h"21#include "util/config.h"22#include "util/time-utils.h"23#include "util/annotate.h"24#include "util/map.h"25#include "util/spark.h"26#include "util/block-info.h"27#include "util/stream.h"28#include "util/util.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 39struct 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. */50enum {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_INDEX63};64 65struct diff_hpp_fmt {66 struct perf_hpp_fmt fmt;67 int idx;68 char *header;69 int header_width;70};71 72struct 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 81static struct data__file *data__files;82static 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 92static bool force;93static bool show_period;94static bool show_formula;95static bool show_baseline_only;96static bool cycles_hist;97static unsigned int sort_compute = 1;98 99static s64 compute_wdiff_w1;100static s64 compute_wdiff_w2;101 102static const char *cpu_list;103static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);104 105enum {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 115const 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 123static int compute = COMPUTE_DELTA_ABS;124 125static 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 70134 135static 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 180static 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 216static 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 229static 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 need249 * 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 272static 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 279static 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 289static 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 299static 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 311static 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 328static 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 337static 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 348static 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 366static 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 377static 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 386struct hist_entry_ops block_hist_ops = {387 .new = block_hist_zalloc,388 .free = block_hist_free,389};390 391static int diff__process_sample_event(const 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 addr_location__init(&al);413 if (machine__resolve(machine, &al, sample) < 0) {414 pr_warning("problem processing %d event, skipping it.\n",415 event->header.type);416 ret = -1;417 goto out;418 }419 420 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) {421 ret = 0;422 goto out;423 }424 425 switch (compute) {426 case COMPUTE_CYCLES:427 if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,428 NULL, NULL, NULL, sample, true)) {429 pr_warning("problem incrementing symbol period, "430 "skipping event\n");431 goto out;432 }433 434 hist__account_cycles(sample->branch_stack, &al, sample,435 false, NULL, evsel);436 break;437 438 case COMPUTE_STREAM:439 if (hist_entry_iter__add(&iter, &al, PERF_MAX_STACK_DEPTH,440 NULL)) {441 pr_debug("problem adding hist entry, skipping event\n");442 goto out;443 }444 break;445 446 default:447 if (!hists__add_entry(hists, &al, NULL, NULL, NULL, NULL, sample,448 true)) {449 pr_warning("problem incrementing symbol period, "450 "skipping event\n");451 goto out;452 }453 }454 455 /*456 * The total_period is updated here before going to the output457 * tree since normally only the baseline hists will call458 * hists__output_resort() and precompute needs the total459 * period in order to sort entries by percentage delta.460 */461 hists->stats.total_period += sample->period;462 if (!al.filtered)463 hists->stats.total_non_filtered_period += sample->period;464 ret = 0;465out:466 addr_location__exit(&al);467 return ret;468}469 470static struct perf_diff pdiff;471 472static struct evsel *evsel_match(struct evsel *evsel,473 struct evlist *evlist)474{475 struct evsel *e;476 477 evlist__for_each_entry(evlist, e) {478 if (evsel__match2(evsel, e))479 return e;480 }481 482 return NULL;483}484 485static void evlist__collapse_resort(struct evlist *evlist)486{487 struct evsel *evsel;488 489 evlist__for_each_entry(evlist, evsel) {490 struct hists *hists = evsel__hists(evsel);491 492 hists__collapse_resort(hists, NULL);493 }494}495 496static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt)497{498 struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);499 void *ptr = dfmt - dfmt->idx;500 struct data__file *d = container_of(ptr, struct data__file, fmt);501 502 return d;503}504 505static struct hist_entry*506get_pair_data(struct hist_entry *he, struct data__file *d)507{508 if (hist_entry__has_pairs(he)) {509 struct hist_entry *pair;510 511 list_for_each_entry(pair, &he->pairs.head, pairs.node)512 if (pair->hists == d->hists)513 return pair;514 }515 516 return NULL;517}518 519static struct hist_entry*520get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)521{522 struct data__file *d = fmt_to_data_file(&dfmt->fmt);523 524 return get_pair_data(he, d);525}526 527static void hists__baseline_only(struct hists *hists)528{529 struct rb_root_cached *root;530 struct rb_node *next;531 532 if (hists__has(hists, need_collapse))533 root = &hists->entries_collapsed;534 else535 root = hists->entries_in;536 537 next = rb_first_cached(root);538 while (next != NULL) {539 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);540 541 next = rb_next(&he->rb_node_in);542 if (!hist_entry__next_pair(he)) {543 rb_erase_cached(&he->rb_node_in, root);544 hist_entry__delete(he);545 }546 }547}548 549static int64_t block_cycles_diff_cmp(struct hist_entry *left,550 struct hist_entry *right)551{552 bool pairs_left = hist_entry__has_pairs(left);553 bool pairs_right = hist_entry__has_pairs(right);554 s64 l, r;555 556 if (!pairs_left && !pairs_right)557 return 0;558 559 l = llabs(left->diff.cycles);560 r = llabs(right->diff.cycles);561 return r - l;562}563 564static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused,565 struct hist_entry *left, struct hist_entry *right)566{567 return block_cycles_diff_cmp(right, left);568}569 570static void init_block_hist(struct block_hist *bh)571{572 __hists__init(&bh->block_hists, &bh->block_list);573 perf_hpp_list__init(&bh->block_list);574 575 INIT_LIST_HEAD(&bh->block_fmt.list);576 INIT_LIST_HEAD(&bh->block_fmt.sort_list);577 bh->block_fmt.cmp = block_info__cmp;578 bh->block_fmt.sort = block_sort;579 perf_hpp_list__register_sort_field(&bh->block_list,580 &bh->block_fmt);581 bh->valid = true;582}583 584static struct hist_entry *get_block_pair(struct hist_entry *he,585 struct hists *hists_pair)586{587 struct rb_root_cached *root = hists_pair->entries_in;588 struct rb_node *next = rb_first_cached(root);589 int64_t cmp;590 591 while (next != NULL) {592 struct hist_entry *he_pair = rb_entry(next, struct hist_entry,593 rb_node_in);594 595 next = rb_next(&he_pair->rb_node_in);596 597 cmp = __block_info__cmp(he_pair, he);598 if (!cmp)599 return he_pair;600 }601 602 return NULL;603}604 605static void init_spark_values(unsigned long *svals, int num)606{607 for (int i = 0; i < num; i++)608 svals[i] = 0;609}610 611static void update_spark_value(unsigned long *svals, int num,612 struct stats *stats, u64 val)613{614 int n = stats->n;615 616 if (n < num)617 svals[n] = val;618}619 620static void compute_cycles_diff(struct hist_entry *he,621 struct hist_entry *pair)622{623 pair->diff.computed = true;624 if (pair->block_info->num && he->block_info->num) {625 pair->diff.cycles =626 pair->block_info->cycles_aggr / pair->block_info->num_aggr -627 he->block_info->cycles_aggr / he->block_info->num_aggr;628 629 if (!cycles_hist)630 return;631 632 init_stats(&pair->diff.stats);633 init_spark_values(pair->diff.svals, NUM_SPARKS);634 635 for (int i = 0; i < pair->block_info->num; i++) {636 u64 val;637 638 if (i >= he->block_info->num || i >= NUM_SPARKS)639 break;640 641 val = llabs(pair->block_info->cycles_spark[i] -642 he->block_info->cycles_spark[i]);643 644 update_spark_value(pair->diff.svals, NUM_SPARKS,645 &pair->diff.stats, val);646 update_stats(&pair->diff.stats, val);647 }648 }649}650 651static void block_hists_match(struct hists *hists_base,652 struct hists *hists_pair)653{654 struct rb_root_cached *root = hists_base->entries_in;655 struct rb_node *next = rb_first_cached(root);656 657 while (next != NULL) {658 struct hist_entry *he = rb_entry(next, struct hist_entry,659 rb_node_in);660 struct hist_entry *pair = get_block_pair(he, hists_pair);661 662 next = rb_next(&he->rb_node_in);663 664 if (pair) {665 hist_entry__add_pair(pair, he);666 compute_cycles_diff(he, pair);667 }668 }669}670 671static void hists__precompute(struct hists *hists)672{673 struct rb_root_cached *root;674 struct rb_node *next;675 676 if (hists__has(hists, need_collapse))677 root = &hists->entries_collapsed;678 else679 root = hists->entries_in;680 681 next = rb_first_cached(root);682 while (next != NULL) {683 struct block_hist *bh, *pair_bh;684 struct hist_entry *he, *pair;685 struct data__file *d;686 int i;687 688 he = rb_entry(next, struct hist_entry, rb_node_in);689 next = rb_next(&he->rb_node_in);690 691 if (compute == COMPUTE_CYCLES) {692 bh = container_of(he, struct block_hist, he);693 init_block_hist(bh);694 block_info__process_sym(he, bh, NULL, 0, 0);695 }696 697 data__for_each_file_new(i, d) {698 pair = get_pair_data(he, d);699 if (!pair)700 continue;701 702 switch (compute) {703 case COMPUTE_DELTA:704 case COMPUTE_DELTA_ABS:705 compute_delta(he, pair);706 break;707 case COMPUTE_RATIO:708 compute_ratio(he, pair);709 break;710 case COMPUTE_WEIGHTED_DIFF:711 compute_wdiff(he, pair);712 break;713 case COMPUTE_CYCLES:714 pair_bh = container_of(pair, struct block_hist,715 he);716 init_block_hist(pair_bh);717 block_info__process_sym(pair, pair_bh, NULL, 0, 0);718 719 bh = container_of(he, struct block_hist, he);720 721 if (bh->valid && pair_bh->valid) {722 block_hists_match(&bh->block_hists,723 &pair_bh->block_hists);724 hists__output_resort(&pair_bh->block_hists,725 NULL);726 }727 break;728 default:729 BUG_ON(1);730 }731 }732 }733}734 735static int64_t cmp_doubles(double l, double r)736{737 if (l > r)738 return -1;739 else if (l < r)740 return 1;741 else742 return 0;743}744 745static int64_t746__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,747 int c)748{749 switch (c) {750 case COMPUTE_DELTA:751 {752 double l = left->diff.period_ratio_delta;753 double r = right->diff.period_ratio_delta;754 755 return cmp_doubles(l, r);756 }757 case COMPUTE_DELTA_ABS:758 {759 double l = fabs(left->diff.period_ratio_delta);760 double r = fabs(right->diff.period_ratio_delta);761 762 return cmp_doubles(l, r);763 }764 case COMPUTE_RATIO:765 {766 double l = left->diff.period_ratio;767 double r = right->diff.period_ratio;768 769 return cmp_doubles(l, r);770 }771 case COMPUTE_WEIGHTED_DIFF:772 {773 s64 l = left->diff.wdiff;774 s64 r = right->diff.wdiff;775 776 return r - l;777 }778 default:779 BUG_ON(1);780 }781 782 return 0;783}784 785static int64_t786hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,787 int c, int sort_idx)788{789 bool pairs_left = hist_entry__has_pairs(left);790 bool pairs_right = hist_entry__has_pairs(right);791 struct hist_entry *p_right, *p_left;792 793 if (!pairs_left && !pairs_right)794 return 0;795 796 if (!pairs_left || !pairs_right)797 return pairs_left ? -1 : 1;798 799 p_left = get_pair_data(left, &data__files[sort_idx]);800 p_right = get_pair_data(right, &data__files[sort_idx]);801 802 if (!p_left && !p_right)803 return 0;804 805 if (!p_left || !p_right)806 return p_left ? -1 : 1;807 808 /*809 * We have 2 entries of same kind, let's810 * make the data comparison.811 */812 return __hist_entry__cmp_compute(p_left, p_right, c);813}814 815static int64_t816hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right,817 int c, int sort_idx)818{819 struct hist_entry *p_right, *p_left;820 821 p_left = get_pair_data(left, &data__files[sort_idx]);822 p_right = get_pair_data(right, &data__files[sort_idx]);823 824 if (!p_left && !p_right)825 return 0;826 827 if (!p_left || !p_right)828 return p_left ? -1 : 1;829 830 if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) {831 /*832 * The delta can be computed without the baseline, but833 * others are not. Put those entries which have no834 * values below.835 */836 if (left->dummy && right->dummy)837 return 0;838 839 if (left->dummy || right->dummy)840 return left->dummy ? 1 : -1;841 }842 843 return __hist_entry__cmp_compute(p_left, p_right, c);844}845 846static int64_t847hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused,848 struct hist_entry *left __maybe_unused,849 struct hist_entry *right __maybe_unused)850{851 return 0;852}853 854static int64_t855hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused,856 struct hist_entry *left, struct hist_entry *right)857{858 if (left->stat.period == right->stat.period)859 return 0;860 return left->stat.period > right->stat.period ? 1 : -1;861}862 863static int64_t864hist_entry__cmp_delta(struct perf_hpp_fmt *fmt,865 struct hist_entry *left, struct hist_entry *right)866{867 struct data__file *d = fmt_to_data_file(fmt);868 869 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);870}871 872static int64_t873hist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt,874 struct hist_entry *left, struct hist_entry *right)875{876 struct data__file *d = fmt_to_data_file(fmt);877 878 return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);879}880 881static int64_t882hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt,883 struct hist_entry *left, struct hist_entry *right)884{885 struct data__file *d = fmt_to_data_file(fmt);886 887 return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);888}889 890static int64_t891hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt,892 struct hist_entry *left, struct hist_entry *right)893{894 struct data__file *d = fmt_to_data_file(fmt);895 896 return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);897}898 899static int64_t900hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused,901 struct hist_entry *left, struct hist_entry *right)902{903 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA,904 sort_compute);905}906 907static int64_t908hist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused,909 struct hist_entry *left, struct hist_entry *right)910{911 return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS,912 sort_compute);913}914 915static int64_t916hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused,917 struct hist_entry *left, struct hist_entry *right)918{919 return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO,920 sort_compute);921}922 923static int64_t924hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused,925 struct hist_entry *left, struct hist_entry *right)926{927 return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF,928 sort_compute);929}930 931static void hists__process(struct hists *hists)932{933 if (show_baseline_only)934 hists__baseline_only(hists);935 936 hists__precompute(hists);937 hists__output_resort(hists, NULL);938 939 if (compute == COMPUTE_CYCLES)940 symbol_conf.report_block = true;941 942 hists__fprintf(hists, !quiet, 0, 0, 0, stdout,943 !symbol_conf.use_callchain);944}945 946static void data__fprintf(void)947{948 struct data__file *d;949 int i;950 951 fprintf(stdout, "# Data files:\n");952 953 data__for_each_file(i, d)954 fprintf(stdout, "# [%d] %s %s\n",955 d->idx, d->data.path,956 !d->idx ? "(Baseline)" : "");957 958 fprintf(stdout, "#\n");959}960 961static void data_process(void)962{963 struct evlist *evlist_base = data__files[0].session->evlist;964 struct evsel *evsel_base;965 bool first = true;966 967 evlist__for_each_entry(evlist_base, evsel_base) {968 struct hists *hists_base = evsel__hists(evsel_base);969 struct data__file *d;970 int i;971 972 data__for_each_file_new(i, d) {973 struct evlist *evlist = d->session->evlist;974 struct evsel *evsel;975 struct hists *hists;976 977 evsel = evsel_match(evsel_base, evlist);978 if (!evsel)979 continue;980 981 hists = evsel__hists(evsel);982 d->hists = hists;983 984 hists__match(hists_base, hists);985 986 if (!show_baseline_only)987 hists__link(hists_base, hists);988 }989 990 if (!quiet) {991 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",992 evsel__name(evsel_base));993 }994 995 first = false;996 997 if (verbose > 0 || ((data__files_cnt > 2) && !quiet))998 data__fprintf();999 1000 /* Don't sort callchain for perf diff */1001 evsel__reset_sample_bit(evsel_base, CALLCHAIN);1002 1003 hists__process(hists_base);1004 }1005}1006 1007static int process_base_stream(struct data__file *data_base,1008 struct data__file *data_pair,1009 const char *title __maybe_unused)1010{1011 struct evlist *evlist_base = data_base->session->evlist;1012 struct evlist *evlist_pair = data_pair->session->evlist;1013 struct evsel *evsel_base, *evsel_pair;1014 struct evsel_streams *es_base, *es_pair;1015 1016 evlist__for_each_entry(evlist_base, evsel_base) {1017 evsel_pair = evsel_match(evsel_base, evlist_pair);1018 if (!evsel_pair)1019 continue;1020 1021 es_base = evsel_streams__entry(data_base->evlist_streams,1022 evsel_base->core.idx);1023 if (!es_base)1024 return -1;1025 1026 es_pair = evsel_streams__entry(data_pair->evlist_streams,1027 evsel_pair->core.idx);1028 if (!es_pair)1029 return -1;1030 1031 evsel_streams__match(es_base, es_pair);1032 evsel_streams__report(es_base, es_pair);1033 }1034 1035 return 0;1036}1037 1038static void stream_process(void)1039{1040 /*1041 * Stream comparison only supports two data files.1042 * perf.data.old and perf.data. data__files[0] is perf.data.old,1043 * data__files[1] is perf.data.1044 */1045 process_base_stream(&data__files[0], &data__files[1],1046 "# Output based on old perf data:\n#\n");1047}1048 1049static void data__free(struct data__file *d)1050{1051 int col;1052 1053 if (d->evlist_streams)1054 evlist_streams__delete(d->evlist_streams);1055 1056 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {1057 struct diff_hpp_fmt *fmt = &d->fmt[col];1058 1059 zfree(&fmt->header);1060 }1061}1062 1063static int abstime_str_dup(char **pstr)1064{1065 char *str = NULL;1066 1067 if (pdiff.time_str && strchr(pdiff.time_str, ':')) {1068 str = strdup(pdiff.time_str);1069 if (!str)1070 return -ENOMEM;1071 }1072 1073 *pstr = str;1074 return 0;1075}1076 1077static int parse_absolute_time(struct data__file *d, char **pstr)1078{1079 char *p = *pstr;1080 int ret;1081 1082 /*1083 * Absolute timestamp for one file has the format: a.b,c.d1084 * For multiple files, the format is: a.b,c.d:a.b,c.d1085 */1086 p = strchr(*pstr, ':');1087 if (p) {1088 if (p == *pstr) {1089 pr_err("Invalid time string\n");1090 return -EINVAL;1091 }1092 1093 *p = 0;1094 p++;1095 if (*p == 0) {1096 pr_err("Invalid time string\n");1097 return -EINVAL;1098 }1099 }1100 1101 ret = perf_time__parse_for_ranges(*pstr, d->session,1102 &pdiff.ptime_range,1103 &pdiff.range_size,1104 &pdiff.range_num);1105 if (ret < 0)1106 return ret;1107 1108 if (!p || *p == 0)1109 *pstr = NULL;1110 else1111 *pstr = p;1112 1113 return ret;1114}1115 1116static int parse_percent_time(struct data__file *d)1117{1118 int ret;1119 1120 ret = perf_time__parse_for_ranges(pdiff.time_str, d->session,1121 &pdiff.ptime_range,1122 &pdiff.range_size,1123 &pdiff.range_num);1124 return ret;1125}1126 1127static int parse_time_str(struct data__file *d, char *abstime_ostr,1128 char **pabstime_tmp)1129{1130 int ret = 0;1131 1132 if (abstime_ostr)1133 ret = parse_absolute_time(d, pabstime_tmp);1134 else if (pdiff.time_str)1135 ret = parse_percent_time(d);1136 1137 return ret;1138}1139 1140static int check_file_brstack(void)1141{1142 struct data__file *d;1143 bool has_br_stack;1144 int i;1145 1146 data__for_each_file(i, d) {1147 d->session = perf_session__new(&d->data, &pdiff.tool);1148 if (IS_ERR(d->session)) {1149 pr_err("Failed to open %s\n", d->data.path);1150 return PTR_ERR(d->session);1151 }1152 1153 has_br_stack = perf_header__has_feat(&d->session->header,1154 HEADER_BRANCH_STACK);1155 perf_session__delete(d->session);1156 if (!has_br_stack)1157 return 0;1158 }1159 1160 /* Set only all files having branch stacks */1161 pdiff.has_br_stack = true;1162 return 0;1163}1164 1165static int __cmd_diff(void)1166{1167 struct data__file *d;1168 int ret, i;1169 char *abstime_ostr, *abstime_tmp;1170 1171 ret = abstime_str_dup(&abstime_ostr);1172 if (ret)1173 return ret;1174 1175 abstime_tmp = abstime_ostr;1176 ret = -EINVAL;1177 1178 data__for_each_file(i, d) {1179 d->session = perf_session__new(&d->data, &pdiff.tool);1180 if (IS_ERR(d->session)) {1181 ret = PTR_ERR(d->session);1182 pr_err("Failed to open %s\n", d->data.path);1183 goto out_delete;1184 }1185 1186 if (pdiff.time_str) {1187 ret = parse_time_str(d, abstime_ostr, &abstime_tmp);1188 if (ret < 0)1189 goto out_delete;1190 }1191 1192 if (cpu_list) {1193 ret = perf_session__cpu_bitmap(d->session, cpu_list,1194 cpu_bitmap);1195 if (ret < 0)1196 goto out_delete;1197 }1198 1199 ret = perf_session__process_events(d->session);1200 if (ret) {1201 pr_err("Failed to process %s\n", d->data.path);1202 goto out_delete;1203 }1204 1205 evlist__collapse_resort(d->session->evlist);1206 1207 if (pdiff.ptime_range)1208 zfree(&pdiff.ptime_range);1209 1210 if (compute == COMPUTE_STREAM) {1211 d->evlist_streams = evlist__create_streams(1212 d->session->evlist, 5);1213 if (!d->evlist_streams) {1214 ret = -ENOMEM;1215 goto out_delete;1216 }1217 }1218 }1219 1220 if (compute == COMPUTE_STREAM)1221 stream_process();1222 else1223 data_process();1224 1225 out_delete:1226 data__for_each_file(i, d) {1227 if (!IS_ERR(d->session))1228 perf_session__delete(d->session);1229 data__free(d);1230 }1231 1232 free(data__files);1233 1234 if (pdiff.ptime_range)1235 zfree(&pdiff.ptime_range);1236 1237 if (abstime_ostr)1238 free(abstime_ostr);1239 1240 return ret;1241}1242 1243static const char * const diff_usage[] = {1244 "perf diff [<options>] [old_file] [new_file]",1245 NULL,1246};1247 1248static const struct option options[] = {1249 OPT_INCR('v', "verbose", &verbose,1250 "be more verbose (show symbol address, etc)"),1251 OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any warnings or messages"),1252 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,1253 "Show only items with match in baseline"),1254 OPT_CALLBACK('c', "compute", &compute,1255 "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs),cycles",1256 "Entries differential computation selection",1257 setup_compute),1258 OPT_BOOLEAN('p', "period", &show_period,1259 "Show period values."),1260 OPT_BOOLEAN('F', "formula", &show_formula,1261 "Show formula."),1262 OPT_BOOLEAN(0, "cycles-hist", &cycles_hist,1263 "Show cycles histogram and standard deviation "1264 "- WARNING: use only with -c cycles."),1265 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,1266 "dump raw trace in ASCII"),1267 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),1268 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,1269 "file", "kallsyms pathname"),1270 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,1271 "load module symbols - WARNING: use only with -k and LIVE kernel"),1272 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",1273 "only consider symbols in these dsos"),1274 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",1275 "only consider symbols in these comms"),1276 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",1277 "only consider these symbols"),1278 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",1279 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."1280 " Please refer the man page for the complete list."),1281 OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",1282 "separator for columns, no spaces will be added between "1283 "columns '.' is reserved."),1284 OPT_CALLBACK(0, "symfs", NULL, "directory",1285 "Look for files with symbols relative to this directory",1286 symbol__config_symfs),1287 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),1288 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",1289 "How to display percentage of filtered entries", parse_filter_percentage),1290 OPT_STRING(0, "time", &pdiff.time_str, "str",1291 "Time span (time percent or absolute timestamp)"),1292 OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"),1293 OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",1294 "only consider symbols in these pids"),1295 OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",1296 "only consider symbols in these tids"),1297 OPT_BOOLEAN(0, "stream", &pdiff.stream,1298 "Enable hot streams comparison."),1299 OPT_END()1300};1301 1302static double baseline_percent(struct hist_entry *he)1303{1304 u64 total = hists__total_period(he->hists);1305 1306 return 100.0 * he->stat.period / total;1307}1308 1309static int hpp__color_baseline(struct perf_hpp_fmt *fmt,1310 struct perf_hpp *hpp, struct hist_entry *he)1311{1312 struct diff_hpp_fmt *dfmt =1313 container_of(fmt, struct diff_hpp_fmt, fmt);1314 double percent = baseline_percent(he);1315 char pfmt[20] = " ";1316 1317 if (!he->dummy) {1318 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);1319 return percent_color_snprintf(hpp->buf, hpp->size,1320 pfmt, percent);1321 } else1322 return scnprintf(hpp->buf, hpp->size, "%*s",1323 dfmt->header_width, pfmt);1324}1325 1326static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)1327{1328 double percent = baseline_percent(he);1329 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";1330 int ret = 0;1331 1332 if (!he->dummy)1333 ret = scnprintf(buf, size, fmt, percent);1334 1335 return ret;1336}1337 1338static int cycles_printf(struct hist_entry *he, struct hist_entry *pair,1339 struct perf_hpp *hpp, int width)1340{1341 struct block_hist *bh = container_of(he, struct block_hist, he);1342 struct block_hist *bh_pair = container_of(pair, struct block_hist, he);1343 struct hist_entry *block_he;1344 struct block_info *bi;1345 char buf[128];1346 char *start_line, *end_line;1347 1348 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);1349 if (!block_he) {1350 hpp->skip = true;1351 return 0;1352 }1353 1354 /*1355 * Avoid printing the warning "addr2line_init failed for ..."1356 */1357 symbol_conf.disable_add2line_warn = true;1358 1359 bi = block_he->block_info;1360 1361 start_line = map__srcline(he->ms.map, bi->sym->start + bi->start,1362 he->ms.sym);1363 1364 end_line = map__srcline(he->ms.map, bi->sym->start + bi->end,1365 he->ms.sym);1366 1367 if (start_line != SRCLINE_UNKNOWN &&1368 end_line != SRCLINE_UNKNOWN) {1369 scnprintf(buf, sizeof(buf), "[%s -> %s] %4ld",1370 start_line, end_line, block_he->diff.cycles);1371 } else {1372 scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld",1373 bi->start, bi->end, block_he->diff.cycles);1374 }1375 1376 zfree_srcline(&start_line);1377 zfree_srcline(&end_line);1378 1379 return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);1380}1381 1382static int __hpp__color_compare(struct perf_hpp_fmt *fmt,1383 struct perf_hpp *hpp, struct hist_entry *he,1384 int comparison_method)1385{1386 struct diff_hpp_fmt *dfmt =1387 container_of(fmt, struct diff_hpp_fmt, fmt);1388 struct hist_entry *pair = get_pair_fmt(he, dfmt);1389 double diff;1390 s64 wdiff;1391 char pfmt[20] = " ";1392 1393 if (!pair) {1394 if (comparison_method == COMPUTE_CYCLES) {1395 struct block_hist *bh;1396 1397 bh = container_of(he, struct block_hist, he);1398 if (bh->block_idx)1399 hpp->skip = true;1400 }1401 1402 goto no_print;1403 }1404 1405 switch (comparison_method) {1406 case COMPUTE_DELTA:1407 if (pair->diff.computed)1408 diff = pair->diff.period_ratio_delta;1409 else1410 diff = compute_delta(he, pair);1411 1412 scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);1413 return percent_color_snprintf(hpp->buf, hpp->size,1414 pfmt, diff);1415 case COMPUTE_RATIO:1416 if (he->dummy)1417 goto dummy_print;1418 if (pair->diff.computed)1419 diff = pair->diff.period_ratio;1420 else1421 diff = compute_ratio(he, pair);1422 1423 scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width);1424 return value_color_snprintf(hpp->buf, hpp->size,1425 pfmt, diff);1426 case COMPUTE_WEIGHTED_DIFF:1427 if (he->dummy)1428 goto dummy_print;1429 if (pair->diff.computed)1430 wdiff = pair->diff.wdiff;1431 else1432 wdiff = compute_wdiff(he, pair);1433 1434 scnprintf(pfmt, 20, "%%14ld", dfmt->header_width);1435 return color_snprintf(hpp->buf, hpp->size,1436 get_percent_color(wdiff),1437 pfmt, wdiff);1438 case COMPUTE_CYCLES:1439 return cycles_printf(he, pair, hpp, dfmt->header_width);1440 default:1441 BUG_ON(1);1442 }1443dummy_print:1444 return scnprintf(hpp->buf, hpp->size, "%*s",1445 dfmt->header_width, "N/A");1446no_print:1447 return scnprintf(hpp->buf, hpp->size, "%*s",1448 dfmt->header_width, pfmt);1449}1450 1451static int hpp__color_delta(struct perf_hpp_fmt *fmt,1452 struct perf_hpp *hpp, struct hist_entry *he)1453{1454 return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);1455}1456 1457static int hpp__color_ratio(struct perf_hpp_fmt *fmt,1458 struct perf_hpp *hpp, struct hist_entry *he)1459{1460 return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);1461}1462 1463static int hpp__color_wdiff(struct perf_hpp_fmt *fmt,1464 struct perf_hpp *hpp, struct hist_entry *he)1465{1466 return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);1467}1468 1469static int hpp__color_cycles(struct perf_hpp_fmt *fmt,1470 struct perf_hpp *hpp, struct hist_entry *he)1471{1472 return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);1473}1474 1475static int all_zero(unsigned long *vals, int len)1476{1477 int i;1478 1479 for (i = 0; i < len; i++)1480 if (vals[i] != 0)1481 return 0;1482 return 1;1483}1484 1485static int print_cycles_spark(char *bf, int size, unsigned long *svals, u64 n)1486{1487 int printed;1488 1489 if (n <= 1)1490 return 0;1491 1492 if (n > NUM_SPARKS)1493 n = NUM_SPARKS;1494 if (all_zero(svals, n))1495 return 0;1496 1497 printed = print_spark(bf, size, svals, n);1498 printed += scnprintf(bf + printed, size - printed, " ");1499 return printed;1500}1501 1502static int hpp__color_cycles_hist(struct perf_hpp_fmt *fmt,1503 struct perf_hpp *hpp, struct hist_entry *he)1504{1505 struct diff_hpp_fmt *dfmt =1506 container_of(fmt, struct diff_hpp_fmt, fmt);1507 struct hist_entry *pair = get_pair_fmt(he, dfmt);1508 struct block_hist *bh = container_of(he, struct block_hist, he);1509 struct block_hist *bh_pair;1510 struct hist_entry *block_he;1511 char spark[32], buf[128];1512 double r;1513 int ret, pad;1514 1515 if (!pair) {1516 if (bh->block_idx)1517 hpp->skip = true;1518 1519 goto no_print;1520 }1521 1522 bh_pair = container_of(pair, struct block_hist, he);1523 1524 block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx);1525 if (!block_he) {1526 hpp->skip = true;1527 goto no_print;1528 }1529 1530 ret = print_cycles_spark(spark, sizeof(spark), block_he->diff.svals,1531 block_he->diff.stats.n);1532 1533 r = rel_stddev_stats(stddev_stats(&block_he->diff.stats),1534 avg_stats(&block_he->diff.stats));1535 1536 if (ret) {1537 /*1538 * Padding spaces if number of sparks less than NUM_SPARKS1539 * otherwise the output is not aligned.1540 */1541 pad = NUM_SPARKS - ((ret - 1) / 3);1542 scnprintf(buf, sizeof(buf), "%s%5.1f%% %s", "\u00B1", r, spark);1543 ret = scnprintf(hpp->buf, hpp->size, "%*s",1544 dfmt->header_width, buf);1545 1546 if (pad) {1547 ret += scnprintf(hpp->buf + ret, hpp->size - ret,1548 "%-*s", pad, " ");1549 }1550 1551 return ret;1552 }1553 1554no_print:1555 return scnprintf(hpp->buf, hpp->size, "%*s",1556 dfmt->header_width, " ");1557}1558 1559static void1560hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)1561{1562 switch (idx) {1563 case PERF_HPP_DIFF__PERIOD_BASELINE:1564 scnprintf(buf, size, "%" PRIu64, he->stat.period);1565 break;1566 1567 default:1568 break;1569 }1570}1571 1572static void1573hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,1574 int idx, char *buf, size_t size)1575{1576 double diff;1577 double ratio;1578 s64 wdiff;1579 1580 switch (idx) {1581 case PERF_HPP_DIFF__DELTA:1582 case PERF_HPP_DIFF__DELTA_ABS:1583 if (pair->diff.computed)1584 diff = pair->diff.period_ratio_delta;1585 else1586 diff = compute_delta(he, pair);1587 1588 scnprintf(buf, size, "%+4.2F%%", diff);1589 break;1590 1591 case PERF_HPP_DIFF__RATIO:1592 /* No point for ratio number if we are dummy.. */1593 if (he->dummy) {1594 scnprintf(buf, size, "N/A");1595 break;1596 }1597 1598 if (pair->diff.computed)1599 ratio = pair->diff.period_ratio;1600 else1601 ratio = compute_ratio(he, pair);1602 1603 if (ratio > 0.0)1604 scnprintf(buf, size, "%14.6F", ratio);1605 break;1606 1607 case PERF_HPP_DIFF__WEIGHTED_DIFF:1608 /* No point for wdiff number if we are dummy.. */1609 if (he->dummy) {1610 scnprintf(buf, size, "N/A");1611 break;1612 }1613 1614 if (pair->diff.computed)1615 wdiff = pair->diff.wdiff;1616 else1617 wdiff = compute_wdiff(he, pair);1618 1619 if (wdiff != 0)1620 scnprintf(buf, size, "%14ld", wdiff);1621 break;1622 1623 case PERF_HPP_DIFF__FORMULA:1624 formula_fprintf(he, pair, buf, size);1625 break;1626 1627 case PERF_HPP_DIFF__PERIOD:1628 scnprintf(buf, size, "%" PRIu64, pair->stat.period);1629 break;1630 1631 default:1632 BUG_ON(1);1633 }1634}1635 1636static void1637__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,1638 char *buf, size_t size)1639{1640 struct hist_entry *pair = get_pair_fmt(he, dfmt);1641 int idx = dfmt->idx;1642 1643 /* baseline is special */1644 if (idx == PERF_HPP_DIFF__BASELINE)1645 hpp__entry_baseline(he, buf, size);1646 else {1647 if (pair)1648 hpp__entry_pair(he, pair, idx, buf, size);1649 else1650 hpp__entry_unpair(he, idx, buf, size);1651 }1652}1653 1654static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,1655 struct hist_entry *he)1656{1657 struct diff_hpp_fmt *dfmt =1658 container_of(_fmt, struct diff_hpp_fmt, fmt);1659 char buf[MAX_COL_WIDTH] = " ";1660 1661 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);1662 1663 if (symbol_conf.field_sep)1664 return scnprintf(hpp->buf, hpp->size, "%s", buf);1665 else1666 return scnprintf(hpp->buf, hpp->size, "%*s",1667 dfmt->header_width, buf);1668}1669 1670static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,1671 struct hists *hists __maybe_unused,1672 int line __maybe_unused,1673 int *span __maybe_unused)1674{1675 struct diff_hpp_fmt *dfmt =1676 container_of(fmt, struct diff_hpp_fmt, fmt);1677 1678 BUG_ON(!dfmt->header);1679 return scnprintf(hpp->buf, hpp->size, dfmt->header);1680}1681 1682static int hpp__width(struct perf_hpp_fmt *fmt,1683 struct perf_hpp *hpp __maybe_unused,1684 struct hists *hists __maybe_unused)1685{1686 struct diff_hpp_fmt *dfmt =1687 container_of(fmt, struct diff_hpp_fmt, fmt);1688 1689 BUG_ON(dfmt->header_width <= 0);1690 return dfmt->header_width;1691}1692 1693static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)1694{1695#define MAX_HEADER_NAME 1001696 char buf_indent[MAX_HEADER_NAME];1697 char buf[MAX_HEADER_NAME];1698 const char *header = NULL;1699 int width = 0;1700 1701 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);1702 header = columns[dfmt->idx].name;1703 width = columns[dfmt->idx].width;1704 1705 /* Only our defined HPP fmts should appear here. */1706 BUG_ON(!header);1707 1708 if (data__files_cnt > 2)1709 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);1710 1711#define NAME (data__files_cnt > 2 ? buf : header)1712 dfmt->header_width = width;1713 width = (int) strlen(NAME);1714 if (dfmt->header_width < width)1715 dfmt->header_width = width;1716 1717 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",1718 dfmt->header_width, NAME);1719 1720 dfmt->header = strdup(buf_indent);1721#undef MAX_HEADER_NAME1722#undef NAME1723}1724 1725static void data__hpp_register(struct data__file *d, int idx)1726{1727 struct diff_hpp_fmt *dfmt = &d->fmt[idx];1728 struct perf_hpp_fmt *fmt = &dfmt->fmt;1729 1730 dfmt->idx = idx;1731 1732 fmt->header = hpp__header;1733 fmt->width = hpp__width;1734 fmt->entry = hpp__entry_global;1735 fmt->cmp = hist_entry__cmp_nop;1736 fmt->collapse = hist_entry__cmp_nop;1737 1738 /* TODO more colors */1739 switch (idx) {1740 case PERF_HPP_DIFF__BASELINE:1741 fmt->color = hpp__color_baseline;1742 fmt->sort = hist_entry__cmp_baseline;1743 break;1744 case PERF_HPP_DIFF__DELTA:1745 fmt->color = hpp__color_delta;1746 fmt->sort = hist_entry__cmp_delta;1747 break;1748 case PERF_HPP_DIFF__RATIO:1749 fmt->color = hpp__color_ratio;1750 fmt->sort = hist_entry__cmp_ratio;1751 break;1752 case PERF_HPP_DIFF__WEIGHTED_DIFF:1753 fmt->color = hpp__color_wdiff;1754 fmt->sort = hist_entry__cmp_wdiff;1755 break;1756 case PERF_HPP_DIFF__DELTA_ABS:1757 fmt->color = hpp__color_delta;1758 fmt->sort = hist_entry__cmp_delta_abs;1759 break;1760 case PERF_HPP_DIFF__CYCLES:1761 fmt->color = hpp__color_cycles;1762 fmt->sort = hist_entry__cmp_nop;1763 break;1764 case PERF_HPP_DIFF__CYCLES_HIST:1765 fmt->color = hpp__color_cycles_hist;1766 fmt->sort = hist_entry__cmp_nop;1767 break;1768 default:1769 fmt->sort = hist_entry__cmp_nop;1770 break;1771 }1772 1773 init_header(d, dfmt);1774 perf_hpp__column_register(fmt);1775 perf_hpp__register_sort_field(fmt);1776}1777 1778static int ui_init(void)1779{1780 struct data__file *d;1781 struct perf_hpp_fmt *fmt;1782 int i;1783 1784 data__for_each_file(i, d) {1785 1786 /*1787 * Baseline or compute related columns:1788 *1789 * PERF_HPP_DIFF__BASELINE1790 * PERF_HPP_DIFF__DELTA1791 * PERF_HPP_DIFF__RATIO1792 * PERF_HPP_DIFF__WEIGHTED_DIFF1793 * PERF_HPP_DIFF__CYCLES1794 */1795 data__hpp_register(d, i ? compute_2_hpp[compute] :1796 PERF_HPP_DIFF__BASELINE);1797 1798 if (cycles_hist && i)1799 data__hpp_register(d, PERF_HPP_DIFF__CYCLES_HIST);1800 1801 /*1802 * And the rest:1803 *1804 * PERF_HPP_DIFF__FORMULA1805 * PERF_HPP_DIFF__PERIOD1806 * PERF_HPP_DIFF__PERIOD_BASELINE1807 */1808 if (show_formula && i)1809 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);1810 1811 if (show_period)1812 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :1813 PERF_HPP_DIFF__PERIOD_BASELINE);1814 }1815 1816 if (!sort_compute)1817 return 0;1818 1819 /*1820 * Prepend an fmt to sort on columns at 'sort_compute' first.1821 * This fmt is added only to the sort list but not to the1822 * output fields list.1823 *1824 * Note that this column (data) can be compared twice - one1825 * for this 'sort_compute' fmt and another for the normal1826 * diff_hpp_fmt. But it shouldn't a problem as most entries1827 * will be sorted out by first try or baseline and comparing1828 * is not a costly operation.1829 */1830 fmt = zalloc(sizeof(*fmt));1831 if (fmt == NULL) {1832 pr_err("Memory allocation failed\n");1833 return -1;1834 }1835 1836 fmt->cmp = hist_entry__cmp_nop;1837 fmt->collapse = hist_entry__cmp_nop;1838 1839 switch (compute) {1840 case COMPUTE_DELTA:1841 fmt->sort = hist_entry__cmp_delta_idx;1842 break;1843 case COMPUTE_RATIO:1844 fmt->sort = hist_entry__cmp_ratio_idx;1845 break;1846 case COMPUTE_WEIGHTED_DIFF:1847 fmt->sort = hist_entry__cmp_wdiff_idx;1848 break;1849 case COMPUTE_DELTA_ABS:1850 fmt->sort = hist_entry__cmp_delta_abs_idx;1851 break;1852 case COMPUTE_CYCLES:1853 /*1854 * Should set since 'fmt->sort' is called without1855 * checking valid during sorting1856 */1857 fmt->sort = hist_entry__cmp_nop;1858 break;1859 default:1860 BUG_ON(1);1861 }1862 1863 perf_hpp__prepend_sort_field(fmt);1864 return 0;1865}1866 1867static int data_init(int argc, const char **argv)1868{1869 struct data__file *d;1870 static const char *defaults[] = {1871 "perf.data.old",1872 "perf.data",1873 };1874 bool use_default = true;1875 int i;1876 1877 data__files_cnt = 2;1878 1879 if (argc) {1880 if (argc == 1)1881 defaults[1] = argv[0];1882 else {1883 data__files_cnt = argc;1884 use_default = false;1885 }1886 } else if (perf_guest) {1887 defaults[0] = "perf.data.host";1888 defaults[1] = "perf.data.guest";1889 }1890 1891 if (sort_compute >= (unsigned int) data__files_cnt) {1892 pr_err("Order option out of limit.\n");1893 return -EINVAL;1894 }1895 1896 data__files = zalloc(sizeof(*data__files) * data__files_cnt);1897 if (!data__files)1898 return -ENOMEM;1899 1900 data__for_each_file(i, d) {1901 struct perf_data *data = &d->data;1902 1903 data->path = use_default ? defaults[i] : argv[i];1904 data->mode = PERF_DATA_MODE_READ;1905 data->force = force;1906 1907 d->idx = i;1908 }1909 1910 return 0;1911}1912 1913static int diff__config(const char *var, const char *value,1914 void *cb __maybe_unused)1915{1916 if (!strcmp(var, "diff.order")) {1917 int ret;1918 if (perf_config_int(&ret, var, value) < 0)1919 return -1;1920 sort_compute = ret;1921 return 0;1922 }1923 if (!strcmp(var, "diff.compute")) {1924 if (!strcmp(value, "delta")) {1925 compute = COMPUTE_DELTA;1926 } else if (!strcmp(value, "delta-abs")) {1927 compute = COMPUTE_DELTA_ABS;1928 } else if (!strcmp(value, "ratio")) {1929 compute = COMPUTE_RATIO;1930 } else if (!strcmp(value, "wdiff")) {1931 compute = COMPUTE_WEIGHTED_DIFF;1932 } else {1933 pr_err("Invalid compute method: %s\n", value);1934 return -1;1935 }1936 }1937 1938 return 0;1939}1940 1941int cmd_diff(int argc, const char **argv)1942{1943 int ret = hists__init();1944 1945 if (ret < 0)1946 return ret;1947 1948 perf_tool__init(&pdiff.tool, /*ordered_events=*/true);1949 pdiff.tool.sample = diff__process_sample_event;1950 pdiff.tool.mmap = perf_event__process_mmap;1951 pdiff.tool.mmap2 = perf_event__process_mmap2;1952 pdiff.tool.comm = perf_event__process_comm;1953 pdiff.tool.exit = perf_event__process_exit;1954 pdiff.tool.fork = perf_event__process_fork;1955 pdiff.tool.lost = perf_event__process_lost;1956 pdiff.tool.namespaces = perf_event__process_namespaces;1957 pdiff.tool.cgroup = perf_event__process_cgroup;1958 pdiff.tool.ordering_requires_timestamps = true;1959 1960 perf_config(diff__config, NULL);1961 1962 argc = parse_options(argc, argv, options, diff_usage, 0);1963 1964 if (quiet)1965 perf_quiet_option();1966 1967 if (cycles_hist && (compute != COMPUTE_CYCLES))1968 usage_with_options(diff_usage, options);1969 1970 if (pdiff.stream)1971 compute = COMPUTE_STREAM;1972 1973 symbol__annotation_init();1974 1975 if (symbol__init(NULL) < 0)1976 return -1;1977 1978 if (data_init(argc, argv) < 0)1979 return -1;1980 1981 if (check_file_brstack() < 0)1982 return -1;1983 1984 if ((compute == COMPUTE_CYCLES || compute == COMPUTE_STREAM)1985 && !pdiff.has_br_stack) {1986 return -1;1987 }1988 1989 if (compute == COMPUTE_STREAM) {1990 symbol_conf.show_branchflag_count = true;1991 symbol_conf.disable_add2line_warn = true;1992 callchain_param.mode = CHAIN_FLAT;1993 callchain_param.key = CCKEY_SRCLINE;1994 callchain_param.branch_callstack = 1;1995 symbol_conf.use_callchain = true;1996 callchain_register_param(&callchain_param);1997 sort_order = "srcline,symbol,dso";1998 } else {1999 if (ui_init() < 0)2000 return -1;2001 2002 sort__mode = SORT_MODE__DIFF;2003 }2004 2005 if (setup_sorting(NULL) < 0)2006 usage_with_options(diff_usage, options);2007 2008 setup_pager();2009 2010 sort__setup_elide(NULL);2011 2012 return __cmd_diff();2013}2014