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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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SPDX-License-Identifier: GPL-2.0/* * builtin-diff.c * * Builtin diff command: Analyze two perf.data input files, look up and read * DSOs and symbol information, sort them and produce a diff. */#include "builtin.h"#include "perf.h"
#include "util/debug.h"#include "util/event.h"#include "util/hist.h"#include "util/evsel.h"#include "util/evlist.h"#include "util/session.h"#include "util/tool.h"#include "util/sort.h"#include "util/srcline.h"#include "util/symbol.h"#include "util/data.h"#include "util/config.h"#include "util/time-utils.h"#include "util/annotate.h"#include "util/map.h"#include "util/spark.h"#include "util/block-info.h"#include "util/stream.h"#include "util/util.h"#include <linux/err.h>#include <linux/zalloc.h>#include <subcmd/pager.h>#include <subcmd/parse-options.h>
#include <errno.h>#include <inttypes.h>#include <stdlib.h>#include <math.h>
struct perf_diff { struct perf_tool tool; const char *time_str; struct perf_time_interval *ptime_range; int range_size; int range_num; bool has_br_stack; bool stream;};
/* Diff command specific HPP columns. */enum { PERF_HPP_DIFF__BASELINE, PERF_HPP_DIFF__PERIOD, PERF_HPP_DIFF__PERIOD_BASELINE, PERF_HPP_DIFF__DELTA, PERF_HPP_DIFF__RATIO, PERF_HPP_DIFF__WEIGHTED_DIFF, PERF_HPP_DIFF__FORMULA, PERF_HPP_DIFF__DELTA_ABS, PERF_HPP_DIFF__CYCLES, PERF_HPP_DIFF__CYCLES_HIST,
PERF_HPP_DIFF__MAX_INDEX};
struct diff_hpp_fmt { struct perf_hpp_fmt fmt; int idx; char *header; int header_width;};
struct data__file { struct perf_session *session; struct perf_data data; int idx; struct hists *hists; struct evlist_streams *evlist_streams; struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];};
static struct data__file *data__files;static int data__files_cnt;
#define data__for_each_file_start(i, d, s) \ for (i = s, d = &data__files[s]; \ i < data__files_cnt; \ i++, d = &data__files[i])
#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
static bool force;static bool show_period;static bool show_formula;static bool show_baseline_only;static bool cycles_hist;static unsigned int sort_compute = 1;
static s64 compute_wdiff_w1;static s64 compute_wdiff_w2;
static const char *cpu_list;static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
enum { COMPUTE_DELTA, COMPUTE_RATIO, COMPUTE_WEIGHTED_DIFF, COMPUTE_DELTA_ABS, COMPUTE_CYCLES, COMPUTE_MAX, COMPUTE_STREAM, /* After COMPUTE_MAX to avoid use current compute arrays */};
static const char *compute_names[COMPUTE_MAX] = { [COMPUTE_DELTA] = "delta", [COMPUTE_DELTA_ABS] = "delta-abs", [COMPUTE_RATIO] = "ratio", [COMPUTE_WEIGHTED_DIFF] = "wdiff", [COMPUTE_CYCLES] = "cycles",};
static int compute = COMPUTE_DELTA_ABS;
static int compute_2_hpp[COMPUTE_MAX] = { [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA, [COMPUTE_DELTA_ABS] = PERF_HPP_DIFF__DELTA_ABS, [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO, [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF, [COMPUTE_CYCLES] = PERF_HPP_DIFF__CYCLES,};
#define MAX_COL_WIDTH 70
static struct header_column { const char *name; int width;} columns[PERF_HPP_DIFF__MAX_INDEX] = { [PERF_HPP_DIFF__BASELINE] = { .name = "Baseline", }, [PERF_HPP_DIFF__PERIOD] = { .name = "Period", .width = 14, }, [PERF_HPP_DIFF__PERIOD_BASELINE] = { .name = "Base period", .width = 14, }, [PERF_HPP_DIFF__DELTA] = { .name = "Delta", .width = 7, }, [PERF_HPP_DIFF__DELTA_ABS] = { .name = "Delta Abs", .width = 7, }, [PERF_HPP_DIFF__RATIO] = { .name = "Ratio", .width = 14, }, [PERF_HPP_DIFF__WEIGHTED_DIFF] = { .name = "Weighted diff", .width = 14, }, [PERF_HPP_DIFF__FORMULA] = { .name = "Formula", .width = MAX_COL_WIDTH, }, [PERF_HPP_DIFF__CYCLES] = { .name = "[Program Block Range] Cycles Diff", .width = 70, }, [PERF_HPP_DIFF__CYCLES_HIST] = { .name = "stddev/Hist", .width = NUM_SPARKS + 9, }};
static int setup_compute_opt_wdiff(const char *opt){ const char *w1_str = opt, *w2_str;
int ret = -EINVAL;
if (!opt) goto out;
w2_str = strchr(opt, ','); if (!w2_str) goto out;
if (!*++w2_str) goto out;
compute_wdiff_w1 = strtol(w1_str, NULL, 10); compute_wdiff_w2 = strtol(w2_str, NULL, 10);
if (!compute_wdiff_w1 || !compute_wdiff_w2) goto out;
pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n", compute_wdiff_w1, compute_wdiff_w2);
ret = 0;
out: if (ret) pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
return ret;}
static int setup_compute_opt(const char *opt){ if (compute == COMPUTE_WEIGHTED_DIFF) return setup_compute_opt_wdiff(opt);
if (opt) { pr_err("Failed: extra option specified '%s'", opt); return -EINVAL; }
return 0;}
static int setup_compute(const struct option *opt, const char *str, int unset __maybe_unused){ int *cp = (int *) opt->value; char *cstr = (char *) str; char buf[50]; unsigned i; const char *option;
if (!str) { *cp = COMPUTE_DELTA; return 0; }
option = strchr(str, ':'); if (option) { unsigned len = option++ - str;
/* * The str data are not writeable, so we need * to use another buffer. */
/* No option value is longer. */ if (len >= sizeof(buf)) return -EINVAL;
strncpy(buf, str, len); buf[len] = 0x0; cstr = buf; }
for (i = 0; i < COMPUTE_MAX; i++) if (!strcmp(cstr, compute_names[i])) { *cp = i; return setup_compute_opt(option); }
pr_err("Failed: '%s' is not computation method " "(use 'delta','ratio' or 'wdiff')\n", str); return -EINVAL;}
static double period_percent(struct hist_entry *he, u64 period){ u64 total = hists__total_period(he->hists);
return (period * 100.0) / total;}
static double compute_delta(struct hist_entry *he, struct hist_entry *pair){ double old_percent = period_percent(he, he->stat.period); double new_percent = period_percent(pair, pair->stat.period);
pair->diff.period_ratio_delta = new_percent - old_percent; pair->diff.computed = true; return pair->diff.period_ratio_delta;}
static double compute_ratio(struct hist_entry *he, struct hist_entry *pair){ double old_period = he->stat.period ?: 1; double new_period = pair->stat.period;
pair->diff.computed = true; pair->diff.period_ratio = new_period / old_period; return pair->diff.period_ratio;}
static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair){ u64 old_period = he->stat.period; u64 new_period = pair->stat.period;
pair->diff.computed = true; pair->diff.wdiff = new_period * compute_wdiff_w2 - old_period * compute_wdiff_w1;
return pair->diff.wdiff;}
static int formula_delta(struct hist_entry *he, struct hist_entry *pair, char *buf, size_t size){ u64 he_total = he->hists->stats.total_period; u64 pair_total = pair->hists->stats.total_period;
if (symbol_conf.filter_relative) { he_total = he->hists->stats.total_non_filtered_period; pair_total = pair->hists->stats.total_non_filtered_period; } return scnprintf(buf, size, "(%" PRIu64 " * 100 / %" PRIu64 ") - " "(%" PRIu64 " * 100 / %" PRIu64 ")", pair->stat.period, pair_total, he->stat.period, he_total);}
static int formula_ratio(struct hist_entry *he, struct hist_entry *pair, char *buf, size_t size){ double old_period = he->stat.period; double new_period = pair->stat.period;
return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);}
static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair, char *buf, size_t size){ u64 old_period = he->stat.period; u64 new_period = pair->stat.period;
return scnprintf(buf, size, "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")", new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);}
static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair, char *buf, size_t size){ switch (compute) { case COMPUTE_DELTA: case COMPUTE_DELTA_ABS: return formula_delta(he, pair, buf, size); case COMPUTE_RATIO: return formula_ratio(he, pair, buf, size); case COMPUTE_WEIGHTED_DIFF: return formula_wdiff(he, pair, buf, size); default: BUG_ON(1); }
return -1;}
static void *block_hist_zalloc(size_t size){ struct block_hist *bh;
bh = zalloc(size + sizeof(*bh)); if (!bh) return NULL;
return &bh->he;}
static void block_hist_free(void *he){ struct block_hist *bh;
bh = container_of(he, struct block_hist, he); hists__delete_entries(&bh->block_hists); free(bh);}
static struct hist_entry_ops block_hist_ops = { .new = block_hist_zalloc, .free = block_hist_free,};
static int diff__process_sample_event(const struct perf_tool *tool, union perf_event *event, struct perf_sample *sample, struct machine *machine){ struct perf_diff *pdiff = container_of(tool, struct perf_diff, tool); struct addr_location al; struct evsel *evsel = sample->evsel; struct hists *hists = evsel__hists(evsel); struct hist_entry_iter iter = { .sample = sample, .ops = &hist_iter_normal, }; int ret = -1;
if (perf_time__ranges_skip_sample(pdiff->ptime_range, pdiff->range_num, sample->time)) { return 0; }
addr_location__init(&al); if (machine__resolve(machine, &al, sample) < 0) { pr_warning("problem processing %s (%u) event at offset %#" PRIx64 ", skipping it.\n", perf_event__name(event->header.type), event->header.type, sample->file_offset); ret = -1; goto out; }
if (cpu_list && (sample->cpu >= MAX_NR_CPUS || !test_bit(sample->cpu, cpu_bitmap))) { ret = 0; goto out; }
switch (compute) { case COMPUTE_CYCLES: if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL, NULL, NULL, NULL, sample, true)) { pr_warning("problem incrementing symbol period, " "skipping event\n"); goto out; }
hist__account_cycles(sample->branch_stack, &al, sample, /*nonany_branch_mode=*/false, /*total_cycles=*/NULL); break;
case COMPUTE_STREAM: if (hist_entry_iter__add(&iter, &al, PERF_MAX_STACK_DEPTH, NULL)) { pr_debug("problem adding hist entry at offset %#" PRIx64 ", skipping event\n", sample->file_offset); goto out; } break;
default: if (!hists__add_entry(hists, &al, NULL, NULL, NULL, NULL, sample, true)) { pr_warning("problem incrementing symbol period, " "skipping event\n"); goto out; } }
/* * The total_period is updated here before going to the output * tree since normally only the baseline hists will call * hists__output_resort() and precompute needs the total * period in order to sort entries by percentage delta. */ hists->stats.total_period += sample->period; if (!al.filtered) hists->stats.total_non_filtered_period += sample->period; ret = 0;out: addr_location__exit(&al); return ret;}
static struct perf_diff pdiff;
static struct evsel *evsel_match(struct evsel *evsel, struct evlist *evlist){ struct evsel *e;
evlist__for_each_entry(evlist, e) { if ((evsel->core.attr.type == e->core.attr.type) && (evsel->core.attr.config == e->core.attr.config)) return e; }
return NULL;}
static void evlist__collapse_resort(struct evlist *evlist){ struct evsel *evsel;
evlist__for_each_entry(evlist, evsel) { struct hists *hists = evsel__hists(evsel);
hists__collapse_resort(hists, NULL); }}
static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt){ struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt); void *ptr = dfmt - dfmt->idx; struct data__file *d = container_of(ptr, struct data__file, fmt);
return d;}
static struct hist_entry*get_pair_data(struct hist_entry *he, struct data__file *d){ if (hist_entry__has_pairs(he)) { struct hist_entry *pair;
list_for_each_entry(pair, &he->pairs.head, pairs.node) if (pair->hists == d->hists) return pair; }
return NULL;}
static struct hist_entry*get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt){ struct data__file *d = fmt_to_data_file(&dfmt->fmt);
return get_pair_data(he, d);}
static void hists__baseline_only(struct hists *hists){ struct rb_root_cached *root; struct rb_node *next;
if (hists__has(hists, need_collapse)) root = &hists->entries_collapsed; else root = hists->entries_in;
next = rb_first_cached(root); while (next != NULL) { struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
next = rb_next(&he->rb_node_in); if (!hist_entry__next_pair(he)) { rb_erase_cached(&he->rb_node_in, root); hist_entry__delete(he); } }}
static int64_t block_cycles_diff_cmp(struct hist_entry *left, struct hist_entry *right){ bool pairs_left = hist_entry__has_pairs(left); bool pairs_right = hist_entry__has_pairs(right); s64 l, r;
if (!pairs_left && !pairs_right) return 0;
l = llabs(left->diff.cycles); r = llabs(right->diff.cycles); return r - l;}
static int64_t block_sort(struct perf_hpp_fmt *fmt __maybe_unused, struct hist_entry *left, struct hist_entry *right){ return block_cycles_diff_cmp(right, left);}
static void init_block_hist(struct block_hist *bh){ __hists__init(&bh->block_hists, &bh->block_list); perf_hpp_list__init(&bh->block_list);
INIT_LIST_HEAD(&bh->block_fmt.list); INIT_LIST_HEAD(&bh->block_fmt.sort_list); bh->block_fmt.cmp = block_info__cmp; bh->block_fmt.sort = block_sort; perf_hpp_list__register_sort_field(&bh->block_list, &bh->block_fmt); bh->valid = true;}
static struct hist_entry *get_block_pair(struct hist_entry *he, struct hists *hists_pair){ struct rb_root_cached *root = hists_pair->entries_in; struct rb_node *next = rb_first_cached(root); int64_t cmp;
while (next != NULL) { struct hist_entry *he_pair = rb_entry(next, struct hist_entry, rb_node_in);
next = rb_next(&he_pair->rb_node_in);
cmp = __block_info__cmp(he_pair, he); if (!cmp) return he_pair; }
return NULL;}
static void init_spark_values(unsigned long *svals, int num){ for (int i = 0; i < num; i++) svals[i] = 0;}
static void update_spark_value(unsigned long *svals, int num, struct stats *stats, u64 val){ int n = stats->n;
if (n < num) svals[n] = val;}
static void compute_cycles_diff(struct hist_entry *he, struct hist_entry *pair){ pair->diff.computed = true; if (pair->block_info->num && he->block_info->num) { pair->diff.cycles = pair->block_info->cycles_aggr / pair->block_info->num_aggr - he->block_info->cycles_aggr / he->block_info->num_aggr;
if (!cycles_hist) return;
init_stats(&pair->diff.stats); init_spark_values(pair->diff.svals, NUM_SPARKS);
for (int i = 0; i < pair->block_info->num; i++) { u64 val;
if (i >= he->block_info->num || i >= NUM_SPARKS) break;
val = llabs(pair->block_info->cycles_spark[i] - he->block_info->cycles_spark[i]);
update_spark_value(pair->diff.svals, NUM_SPARKS, &pair->diff.stats, val); update_stats(&pair->diff.stats, val); } }}
static void block_hists_match(struct hists *hists_base, struct hists *hists_pair){ struct rb_root_cached *root = hists_base->entries_in; struct rb_node *next = rb_first_cached(root);
while (next != NULL) { struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in); struct hist_entry *pair = get_block_pair(he, hists_pair);
next = rb_next(&he->rb_node_in);
if (pair) { hist_entry__add_pair(pair, he); compute_cycles_diff(he, pair); } }}
static void hists__precompute(struct hists *hists){ struct rb_root_cached *root; struct rb_node *next;
if (hists__has(hists, need_collapse)) root = &hists->entries_collapsed; else root = hists->entries_in;
next = rb_first_cached(root); while (next != NULL) { struct block_hist *bh, *pair_bh; struct hist_entry *he, *pair; struct data__file *d; int i;
he = rb_entry(next, struct hist_entry, rb_node_in); next = rb_next(&he->rb_node_in);
if (compute == COMPUTE_CYCLES) { bh = container_of(he, struct block_hist, he); init_block_hist(bh); block_info__process_sym(he, bh, NULL, 0, 0); }
data__for_each_file_new(i, d) { pair = get_pair_data(he, d); if (!pair) continue;
switch (compute) { case COMPUTE_DELTA: case COMPUTE_DELTA_ABS: compute_delta(he, pair); break; case COMPUTE_RATIO: compute_ratio(he, pair); break; case COMPUTE_WEIGHTED_DIFF: compute_wdiff(he, pair); break; case COMPUTE_CYCLES: pair_bh = container_of(pair, struct block_hist, he); init_block_hist(pair_bh); block_info__process_sym(pair, pair_bh, NULL, 0, 0);
bh = container_of(he, struct block_hist, he);
if (bh->valid && pair_bh->valid) { block_hists_match(&bh->block_hists, &pair_bh->block_hists); hists__output_resort(&pair_bh->block_hists, NULL); } break; default: BUG_ON(1); } } }}
static int64_t cmp_doubles(double l, double r){ if (l > r) return -1; else if (l < r) return 1; else return 0;}
static int64_t__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right, int c){ switch (c) { case COMPUTE_DELTA: { double l = left->diff.period_ratio_delta; double r = right->diff.period_ratio_delta;
return cmp_doubles(l, r); } case COMPUTE_DELTA_ABS: { double l = fabs(left->diff.period_ratio_delta); double r = fabs(right->diff.period_ratio_delta);
return cmp_doubles(l, r); } case COMPUTE_RATIO: { double l = left->diff.period_ratio; double r = right->diff.period_ratio;
return cmp_doubles(l, r); } case COMPUTE_WEIGHTED_DIFF: { s64 l = left->diff.wdiff; s64 r = right->diff.wdiff;
return r - l; } default: BUG_ON(1); }
return 0;}
static int64_thist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right, int c, int sort_idx){ bool pairs_left = hist_entry__has_pairs(left); bool pairs_right = hist_entry__has_pairs(right); struct hist_entry *p_right, *p_left;
if (!pairs_left && !pairs_right) return 0;
if (!pairs_left || !pairs_right) return pairs_left ? -1 : 1;
p_left = get_pair_data(left, &data__files[sort_idx]); p_right = get_pair_data(right, &data__files[sort_idx]);
if (!p_left && !p_right) return 0;
if (!p_left || !p_right) return p_left ? -1 : 1;
/* * We have 2 entries of same kind, let's * make the data comparison. */ return __hist_entry__cmp_compute(p_left, p_right, c);}
static int64_thist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right, int c, int sort_idx){ struct hist_entry *p_right, *p_left;
p_left = get_pair_data(left, &data__files[sort_idx]); p_right = get_pair_data(right, &data__files[sort_idx]);
if (!p_left && !p_right) return 0;
if (!p_left || !p_right) return p_left ? -1 : 1;
if (c != COMPUTE_DELTA && c != COMPUTE_DELTA_ABS) { /* * The delta can be computed without the baseline, but * others are not. Put those entries which have no * values below. */ if (left->dummy && right->dummy) return 0;
if (left->dummy || right->dummy) return left->dummy ? 1 : -1; }
return __hist_entry__cmp_compute(p_left, p_right, c);}
static int64_thist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused, struct hist_entry *left __maybe_unused, struct hist_entry *right __maybe_unused){ return 0;}
static int64_thist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused, struct hist_entry *left, struct hist_entry *right){ if (left->stat.period == right->stat.period) return 0; return left->stat.period > right->stat.period ? 1 : -1;}
static int64_thist_entry__cmp_delta(struct perf_hpp_fmt *fmt, struct hist_entry *left, struct hist_entry *right){ struct data__file *d = fmt_to_data_file(fmt);
return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx);}
static int64_thist_entry__cmp_delta_abs(struct perf_hpp_fmt *fmt, struct hist_entry *left, struct hist_entry *right){ struct data__file *d = fmt_to_data_file(fmt);
return hist_entry__cmp_compute(right, left, COMPUTE_DELTA_ABS, d->idx);}
static int64_thist_entry__cmp_ratio(struct perf_hpp_fmt *fmt, struct hist_entry *left, struct hist_entry *right){ struct data__file *d = fmt_to_data_file(fmt);
return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx);}
static int64_thist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt, struct hist_entry *left, struct hist_entry *right){ struct data__file *d = fmt_to_data_file(fmt);
return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx);}
static int64_thist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused, struct hist_entry *left, struct hist_entry *right){ return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA, sort_compute);}
static int64_thist_entry__cmp_delta_abs_idx(struct perf_hpp_fmt *fmt __maybe_unused, struct hist_entry *left, struct hist_entry *right){ return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA_ABS, sort_compute);}
static int64_thist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused, struct hist_entry *left, struct hist_entry *right){ return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO, sort_compute);}
static int64_thist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused, struct hist_entry *left, struct hist_entry *right){ return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF, sort_compute);}
static void hists__process(struct hists *hists){ if (show_baseline_only) hists__baseline_only(hists);
hists__precompute(hists); hists__output_resort(hists, NULL);
if (compute == COMPUTE_CYCLES) symbol_conf.report_block = true;
hists__fprintf(hists, !quiet, 0, 0, 0, stdout, !symbol_conf.use_callchain);}
static void data__fprintf(void){ struct data__file *d; int i;
fprintf(stdout, "# Data files:\n");
data__for_each_file(i, d) fprintf(stdout, "# [%d] %s %s\n", d->idx, d->data.path, !d->idx ? "(Baseline)" : "");
fprintf(stdout, "#\n");}
static void data_process(void){ struct evlist *evlist_base = data__files[0].session->evlist; struct evsel *evsel_base; bool first = true;
evlist__for_each_entry(evlist_base, evsel_base) { struct hists *hists_base = evsel__hists(evsel_base); struct data__file *d; int i;
data__for_each_file_new(i, d) { struct evlist *evlist = d->session->evlist; struct evsel *evsel; struct hists *hists;
evsel = evsel_match(evsel_base, evlist); if (!evsel) continue;
hists = evsel__hists(evsel); d->hists = hists;
hists__match(hists_base, hists);
if (!show_baseline_only) hists__link(hists_base, hists); }
if (!quiet) { fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n", evsel__name(evsel_base)); }
first = false;
if (verbose > 0 || ((data__files_cnt > 2) && !quiet)) data__fprintf();
/* Don't sort callchain for perf diff */ evsel__reset_sample_bit(evsel_base, CALLCHAIN);
hists__process(hists_base); }}
static int process_base_stream(struct data__file *data_base, struct data__file *data_pair, const char *title __maybe_unused){ struct evlist *evlist_base = data_base->session->evlist; struct evlist *evlist_pair = data_pair->session->evlist; struct evsel *evsel_base, *evsel_pair; struct evsel_streams *es_base, *es_pair;
evlist__for_each_entry(evlist_base, evsel_base) { evsel_pair = evsel_match(evsel_base, evlist_pair); if (!evsel_pair) continue;
es_base = evsel_streams__entry(data_base->evlist_streams, evsel_base); if (!es_base) return -1;
es_pair = evsel_streams__entry(data_pair->evlist_streams, evsel_pair); if (!es_pair) return -1;
evsel_streams__match(es_base, es_pair); evsel_streams__report(es_base, es_pair); }
return 0;}
static void stream_process(void){ /* * Stream comparison only supports two data files. * perf.data.old and perf.data. data__files[0] is perf.data.old, * data__files[1] is perf.data. */ process_base_stream(&data__files[0], &data__files[1], "# Output based on old perf data:\n#\n");}
static void data__free(struct data__file *d){ int col;
if (d->evlist_streams) evlist_streams__delete(d->evlist_streams);
for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) { struct diff_hpp_fmt *fmt = &d->fmt[col];
zfree(&fmt->header); }}
static int abstime_str_dup(char **pstr){ char *str = NULL;
if (pdiff.time_str && strchr(pdiff.time_str, ':')) { str = strdup(pdiff.time_str); if (!str) return -ENOMEM; }
*pstr = str; return 0;}
static int parse_absolute_time(struct data__file *d, char **pstr){ char *p = *pstr; int ret;
/* * Absolute timestamp for one file has the format: a.b,c.d * For multiple files, the format is: a.b,c.d:a.b,c.d */ p = strchr(*pstr, ':'); if (p) { if (p == *pstr) { pr_err("Invalid time string\n"); return -EINVAL; }
*p = 0; p++; if (*p == 0) { pr_err("Invalid time string\n"); return -EINVAL; } }
ret = perf_time__parse_for_ranges(*pstr, d->session, &pdiff.ptime_range, &pdiff.range_size, &pdiff.range_num); if (ret < 0) return ret;
if (!p || *p == 0) *pstr = NULL; else *pstr = p;
return ret;}
static int parse_percent_time(struct data__file *d){ int ret;
ret = perf_time__parse_for_ranges(pdiff.time_str, d->session, &pdiff.ptime_range, &pdiff.range_size, &pdiff.range_num); return ret;}
static int parse_time_str(struct data__file *d, char *abstime_ostr, char **pabstime_tmp){ int ret = 0;
if (abstime_ostr) ret = parse_absolute_time(d, pabstime_tmp); else if (pdiff.time_str) ret = parse_percent_time(d);
return ret;}
static int check_file_brstack(void){ struct data__file *d; bool has_br_stack; int i;
data__for_each_file(i, d) { d->session = perf_session__new(&d->data, &pdiff.tool); if (IS_ERR(d->session)) { pr_err("Failed to open %s\n", d->data.path); return PTR_ERR(d->session); }
has_br_stack = perf_header__has_feat(&d->session->header, HEADER_BRANCH_STACK); perf_session__delete(d->session); if (!has_br_stack) return 0; }
/* Set only all files having branch stacks */ pdiff.has_br_stack = true; return 0;}
static int __cmd_diff(void){ struct data__file *d; int ret, i; char *abstime_ostr, *abstime_tmp;
ret = abstime_str_dup(&abstime_ostr); if (ret) return ret;
abstime_tmp = abstime_ostr; ret = -EINVAL;
data__for_each_file(i, d) { d->session = perf_session__new(&d->data, &pdiff.tool); if (IS_ERR(d->session)) { ret = PTR_ERR(d->session); pr_err("Failed to open %s\n", d->data.path); goto out_delete; }
if (pdiff.time_str) { ret = parse_time_str(d, abstime_ostr, &abstime_tmp); if (ret < 0) goto out_delete; }
if (cpu_list) { ret = perf_session__cpu_bitmap(d->session, cpu_list, cpu_bitmap); if (ret < 0) goto out_delete; }
ret = perf_session__process_events(d->session); if (ret) { pr_err("Failed to process %s\n", d->data.path); goto out_delete; }
evlist__collapse_resort(d->session->evlist);
if (pdiff.ptime_range) zfree(&pdiff.ptime_range);
if (compute == COMPUTE_STREAM) { d->evlist_streams = evlist__create_streams( d->session->evlist, 5); if (!d->evlist_streams) { ret = -ENOMEM; goto out_delete; } } }
if (compute == COMPUTE_STREAM) stream_process(); else data_process();
out_delete: data__for_each_file(i, d) { if (!IS_ERR(d->session)) perf_session__delete(d->session); data__free(d); }
free(data__files);
if (pdiff.ptime_range) zfree(&pdiff.ptime_range);
if (abstime_ostr) free(abstime_ostr);
return ret;}
static const char * const diff_usage[] = { "perf diff [<options>] [old_file] [new_file]", NULL,};
static const struct option options[] = { OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"), OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any warnings or messages"), OPT_BOOLEAN('b', "baseline-only", &show_baseline_only, "Show only items with match in baseline"), OPT_CALLBACK('c', "compute", &compute, "delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs),cycles", "Entries differential computation selection", setup_compute), OPT_BOOLEAN('p', "period", &show_period, "Show period values."), OPT_BOOLEAN('F', "formula", &show_formula, "Show formula."), OPT_BOOLEAN(0, "cycles-hist", &cycles_hist, "Show cycles histogram and standard deviation " "- WARNING: use only with -c cycles."), OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file", "kallsyms pathname"), OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, "load module symbols - WARNING: use only with -k and LIVE kernel"), OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", "only consider symbols in these dsos"), OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]", "only consider symbols in these comms"), OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", "only consider these symbols"), OPT_STRING('s', "sort", &sort_order, "key[,key2...]", "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..." " Please refer the man page for the complete list."), OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator", "separator for columns, no spaces will be added between " "columns '.' is reserved."), OPT_CALLBACK(0, "symfs", NULL, "directory[,layout]", SYMFS_HELP, symbol__config_symfs), OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."), OPT_CALLBACK(0, "percentage", NULL, "relative|absolute", "How to display percentage of filtered entries", parse_filter_percentage), OPT_STRING(0, "time", &pdiff.time_str, "str", "Time span (time percent or absolute timestamp)"), OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"), OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]", "only consider symbols in these pids"), OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]", "only consider symbols in these tids"), OPT_BOOLEAN(0, "stream", &pdiff.stream, "Enable hot streams comparison."), OPT_END()};
static double baseline_percent(struct hist_entry *he){ u64 total = hists__total_period(he->hists);
return 100.0 * he->stat.period / total;}
static int hpp__color_baseline(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he){ struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt); double percent = baseline_percent(he); char pfmt[20] = " ";
if (!he->dummy) { scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1); return percent_color_snprintf(hpp->buf, hpp->size, pfmt, percent); } else return scnprintf(hpp->buf, hpp->size, "%*s", dfmt->header_width, pfmt);}
static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size){ double percent = baseline_percent(he); const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%"; int ret = 0;
if (!he->dummy) ret = scnprintf(buf, size, fmt, percent);
return ret;}
static int cycles_printf(struct hist_entry *he, struct hist_entry *pair, struct perf_hpp *hpp, int width){ struct block_hist *bh = container_of(he, struct block_hist, he); struct block_hist *bh_pair = container_of(pair, struct block_hist, he); struct hist_entry *block_he; struct block_info *bi; char buf[128]; char *start_line, *end_line;
block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx); if (!block_he) { hpp->skip = true; return 0; }
/* * Avoid printing the warning "addr2line_init failed for ..." */ symbol_conf.addr2line_disable_warn = true;
bi = block_he->block_info;
start_line = map__srcline(he->ms.map, bi->sym->start + bi->start, he->ms.sym);
end_line = map__srcline(he->ms.map, bi->sym->start + bi->end, he->ms.sym);
if (start_line != SRCLINE_UNKNOWN && end_line != SRCLINE_UNKNOWN) { scnprintf(buf, sizeof(buf), "[%s -> %s] %4ld", start_line, end_line, block_he->diff.cycles); } else { scnprintf(buf, sizeof(buf), "[%7lx -> %7lx] %4ld", bi->start, bi->end, block_he->diff.cycles); }
zfree_srcline(&start_line); zfree_srcline(&end_line);
return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);}
static int __hpp__color_compare(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he, int comparison_method){ struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt); struct hist_entry *pair = get_pair_fmt(he, dfmt); double diff; s64 wdiff; char pfmt[20] = " ";
if (!pair) { if (comparison_method == COMPUTE_CYCLES) { struct block_hist *bh;
bh = container_of(he, struct block_hist, he); if (bh->block_idx) hpp->skip = true; }
goto no_print; }
switch (comparison_method) { case COMPUTE_DELTA: if (pair->diff.computed) diff = pair->diff.period_ratio_delta; else diff = compute_delta(he, pair);
scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1); return percent_color_snprintf(hpp->buf, hpp->size, pfmt, diff); case COMPUTE_RATIO: if (he->dummy) goto dummy_print; if (pair->diff.computed) diff = pair->diff.period_ratio; else diff = compute_ratio(he, pair);
scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width); return value_color_snprintf(hpp->buf, hpp->size, pfmt, diff); case COMPUTE_WEIGHTED_DIFF: if (he->dummy) goto dummy_print; if (pair->diff.computed) wdiff = pair->diff.wdiff; else wdiff = compute_wdiff(he, pair);
scnprintf(pfmt, 20, "%%14ld", dfmt->header_width); return color_snprintf(hpp->buf, hpp->size, get_percent_color(wdiff), pfmt, wdiff); case COMPUTE_CYCLES: return cycles_printf(he, pair, hpp, dfmt->header_width); default: BUG_ON(1); }dummy_print: return scnprintf(hpp->buf, hpp->size, "%*s", dfmt->header_width, "N/A");no_print: return scnprintf(hpp->buf, hpp->size, "%*s", dfmt->header_width, pfmt);}
static int hpp__color_delta(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he){ return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA);}
static int hpp__color_ratio(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he){ return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO);}
static int hpp__color_wdiff(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he){ return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF);}
static int hpp__color_cycles(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he){ return __hpp__color_compare(fmt, hpp, he, COMPUTE_CYCLES);}
static int all_zero(unsigned long *vals, int len){ int i;
for (i = 0; i < len; i++) if (vals[i] != 0) return 0; return 1;}
static int print_cycles_spark(char *bf, int size, unsigned long *svals, u64 n){ int printed;
if (n <= 1) return 0;
if (n > NUM_SPARKS) n = NUM_SPARKS; if (all_zero(svals, n)) return 0;
printed = print_spark(bf, size, svals, n); printed += scnprintf(bf + printed, size - printed, " "); return printed;}
static int hpp__color_cycles_hist(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he){ struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt); struct hist_entry *pair = get_pair_fmt(he, dfmt); struct block_hist *bh = container_of(he, struct block_hist, he); struct block_hist *bh_pair; struct hist_entry *block_he; char spark[32], buf[128]; double r; int ret, pad;
if (!pair) { if (bh->block_idx) hpp->skip = true;
goto no_print; }
bh_pair = container_of(pair, struct block_hist, he);
block_he = hists__get_entry(&bh_pair->block_hists, bh->block_idx); if (!block_he) { hpp->skip = true; goto no_print; }
ret = print_cycles_spark(spark, sizeof(spark), block_he->diff.svals, block_he->diff.stats.n);
r = rel_stddev_stats(stddev_stats(&block_he->diff.stats), avg_stats(&block_he->diff.stats));
if (ret) { /* * Padding spaces if number of sparks less than NUM_SPARKS * otherwise the output is not aligned. */ pad = NUM_SPARKS - ((ret - 1) / 3); scnprintf(buf, sizeof(buf), "%s%5.1f%% %s", "\u00B1", r, spark); ret = scnprintf(hpp->buf, hpp->size, "%*s", dfmt->header_width, buf);
if (pad) { ret += scnprintf(hpp->buf + ret, hpp->size - ret, "%-*s", pad, " "); }
return ret; }
no_print: return scnprintf(hpp->buf, hpp->size, "%*s", dfmt->header_width, " ");}
static voidhpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size){ switch (idx) { case PERF_HPP_DIFF__PERIOD_BASELINE: scnprintf(buf, size, "%" PRIu64, he->stat.period); break;
default: break; }}
static voidhpp__entry_pair(struct hist_entry *he, struct hist_entry *pair, int idx, char *buf, size_t size){ double diff; double ratio; s64 wdiff;
switch (idx) { case PERF_HPP_DIFF__DELTA: case PERF_HPP_DIFF__DELTA_ABS: if (pair->diff.computed) diff = pair->diff.period_ratio_delta; else diff = compute_delta(he, pair);
scnprintf(buf, size, "%+4.2F%%", diff); break;
case PERF_HPP_DIFF__RATIO: /* No point for ratio number if we are dummy.. */ if (he->dummy) { scnprintf(buf, size, "N/A"); break; }
if (pair->diff.computed) ratio = pair->diff.period_ratio; else ratio = compute_ratio(he, pair);
if (ratio > 0.0) scnprintf(buf, size, "%14.6F", ratio); break;
case PERF_HPP_DIFF__WEIGHTED_DIFF: /* No point for wdiff number if we are dummy.. */ if (he->dummy) { scnprintf(buf, size, "N/A"); break; }
if (pair->diff.computed) wdiff = pair->diff.wdiff; else wdiff = compute_wdiff(he, pair);
if (wdiff != 0) scnprintf(buf, size, "%14ld", wdiff); break;
case PERF_HPP_DIFF__FORMULA: formula_fprintf(he, pair, buf, size); break;
case PERF_HPP_DIFF__PERIOD: scnprintf(buf, size, "%" PRIu64, pair->stat.period); break;
default: BUG_ON(1); }}
static void__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt, char *buf, size_t size){ struct hist_entry *pair = get_pair_fmt(he, dfmt); int idx = dfmt->idx;
/* baseline is special */ if (idx == PERF_HPP_DIFF__BASELINE) hpp__entry_baseline(he, buf, size); else { if (pair) hpp__entry_pair(he, pair, idx, buf, size); else hpp__entry_unpair(he, idx, buf, size); }}
static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp, struct hist_entry *he){ struct diff_hpp_fmt *dfmt = container_of(_fmt, struct diff_hpp_fmt, fmt); char buf[MAX_COL_WIDTH] = " ";
__hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
if (symbol_conf.field_sep) return scnprintf(hpp->buf, hpp->size, "%s", buf); else return scnprintf(hpp->buf, hpp->size, "%*s", dfmt->header_width, buf);}
static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hists *hists __maybe_unused, int line __maybe_unused, int *span __maybe_unused){ struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
BUG_ON(!dfmt->header); return scnprintf(hpp->buf, hpp->size, dfmt->header);}
static int hpp__width(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp __maybe_unused, struct hists *hists __maybe_unused){ struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt);
BUG_ON(dfmt->header_width <= 0); return dfmt->header_width;}
static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt){#define MAX_HEADER_NAME 100 char buf_indent[MAX_HEADER_NAME]; char buf[MAX_HEADER_NAME]; const char *header = NULL; int width = 0;
BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX); header = columns[dfmt->idx].name; width = columns[dfmt->idx].width;
/* Only our defined HPP fmts should appear here. */ BUG_ON(!header);
if (data__files_cnt > 2) scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
#define NAME (data__files_cnt > 2 ? buf : header) dfmt->header_width = width; width = (int) strlen(NAME); if (dfmt->header_width < width) dfmt->header_width = width;
scnprintf(buf_indent, MAX_HEADER_NAME, "%*s", dfmt->header_width, NAME);
dfmt->header = strdup(buf_indent);#undef MAX_HEADER_NAME#undef NAME}
static void data__hpp_register(struct data__file *d, int idx){ struct diff_hpp_fmt *dfmt = &d->fmt[idx]; struct perf_hpp_fmt *fmt = &dfmt->fmt;
dfmt->idx = idx;
fmt->header = hpp__header; fmt->width = hpp__width; fmt->entry = hpp__entry_global; fmt->cmp = hist_entry__cmp_nop; fmt->collapse = hist_entry__cmp_nop;
/* TODO more colors */ switch (idx) { case PERF_HPP_DIFF__BASELINE: fmt->color = hpp__color_baseline; fmt->sort = hist_entry__cmp_baseline; break; case PERF_HPP_DIFF__DELTA: fmt->color = hpp__color_delta; fmt->sort = hist_entry__cmp_delta; break; case PERF_HPP_DIFF__RATIO: fmt->color = hpp__color_ratio; fmt->sort = hist_entry__cmp_ratio; break; case PERF_HPP_DIFF__WEIGHTED_DIFF: fmt->color = hpp__color_wdiff; fmt->sort = hist_entry__cmp_wdiff; break; case PERF_HPP_DIFF__DELTA_ABS: fmt->color = hpp__color_delta; fmt->sort = hist_entry__cmp_delta_abs; break; case PERF_HPP_DIFF__CYCLES: fmt->color = hpp__color_cycles; fmt->sort = hist_entry__cmp_nop; break; case PERF_HPP_DIFF__CYCLES_HIST: fmt->color = hpp__color_cycles_hist; fmt->sort = hist_entry__cmp_nop; break; default: fmt->sort = hist_entry__cmp_nop; break; }
init_header(d, dfmt); perf_hpp__column_register(fmt); perf_hpp__register_sort_field(fmt);}
static int ui_init(void){ struct data__file *d; struct perf_hpp_fmt *fmt; int i;
data__for_each_file(i, d) {
/* * Baseline or compute related columns: * * PERF_HPP_DIFF__BASELINE * PERF_HPP_DIFF__DELTA * PERF_HPP_DIFF__RATIO * PERF_HPP_DIFF__WEIGHTED_DIFF * PERF_HPP_DIFF__CYCLES */ data__hpp_register(d, i ? compute_2_hpp[compute] : PERF_HPP_DIFF__BASELINE);
if (cycles_hist && i) data__hpp_register(d, PERF_HPP_DIFF__CYCLES_HIST);
/* * And the rest: * * PERF_HPP_DIFF__FORMULA * PERF_HPP_DIFF__PERIOD * PERF_HPP_DIFF__PERIOD_BASELINE */ if (show_formula && i) data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
if (show_period) data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD : PERF_HPP_DIFF__PERIOD_BASELINE); }
if (!sort_compute) return 0;
/* * Prepend an fmt to sort on columns at 'sort_compute' first. * This fmt is added only to the sort list but not to the * output fields list. * * Note that this column (data) can be compared twice - one * for this 'sort_compute' fmt and another for the normal * diff_hpp_fmt. But it shouldn't a problem as most entries * will be sorted out by first try or baseline and comparing * is not a costly operation. */ fmt = zalloc(sizeof(*fmt)); if (fmt == NULL) { pr_err("Memory allocation failed\n"); return -1; }
fmt->cmp = hist_entry__cmp_nop; fmt->collapse = hist_entry__cmp_nop;
switch (compute) { case COMPUTE_DELTA: fmt->sort = hist_entry__cmp_delta_idx; break; case COMPUTE_RATIO: fmt->sort = hist_entry__cmp_ratio_idx; break; case COMPUTE_WEIGHTED_DIFF: fmt->sort = hist_entry__cmp_wdiff_idx; break; case COMPUTE_DELTA_ABS: fmt->sort = hist_entry__cmp_delta_abs_idx; break; case COMPUTE_CYCLES: /* * Should set since 'fmt->sort' is called without * checking valid during sorting */ fmt->sort = hist_entry__cmp_nop; break; default: BUG_ON(1); }
perf_hpp__prepend_sort_field(fmt); return 0;}
static int data_init(int argc, const char **argv){ struct data__file *d; static const char *defaults[] = { "perf.data.old", "perf.data", }; bool use_default = true; int i;
data__files_cnt = 2;
if (argc) { if (argc == 1) defaults[1] = argv[0]; else { data__files_cnt = argc; use_default = false; } } else if (perf_guest) { defaults[0] = "perf.data.host"; defaults[1] = "perf.data.guest"; }
if (sort_compute >= (unsigned int) data__files_cnt) { pr_err("Order option out of limit.\n"); return -EINVAL; }
data__files = calloc(data__files_cnt, sizeof(*data__files)); if (!data__files) return -ENOMEM;
data__for_each_file(i, d) { struct perf_data *data = &d->data;
data->path = use_default ? defaults[i] : argv[i]; data->mode = PERF_DATA_MODE_READ; data->force = force;
d->idx = i; }
return 0;}
static int diff__config(const char *var, const char *value, void *cb __maybe_unused){ if (!strcmp(var, "diff.order")) { int ret; if (perf_config_int(&ret, var, value) < 0) return -1; sort_compute = ret; return 0; } if (!strcmp(var, "diff.compute")) { if (!strcmp(value, "delta")) { compute = COMPUTE_DELTA; } else if (!strcmp(value, "delta-abs")) { compute = COMPUTE_DELTA_ABS; } else if (!strcmp(value, "ratio")) { compute = COMPUTE_RATIO; } else if (!strcmp(value, "wdiff")) { compute = COMPUTE_WEIGHTED_DIFF; } else { pr_err("Invalid compute method: %s\n", value); return -1; } }
return 0;}
int cmd_diff(int argc, const char **argv){ int ret = hists__init();
if (ret < 0) return ret;
perf_tool__init(&pdiff.tool, /*ordered_events=*/true); pdiff.tool.sample = diff__process_sample_event; pdiff.tool.mmap = perf_event__process_mmap; pdiff.tool.mmap2 = perf_event__process_mmap2; pdiff.tool.comm = perf_event__process_comm; pdiff.tool.exit = perf_event__process_exit; pdiff.tool.fork = perf_event__process_fork; pdiff.tool.lost = perf_event__process_lost; pdiff.tool.namespaces = perf_event__process_namespaces; pdiff.tool.cgroup = perf_event__process_cgroup; pdiff.tool.ordering_requires_timestamps = true;
perf_config(diff__config, NULL);
argc = parse_options(argc, argv, options, diff_usage, 0);
if (quiet) perf_quiet_option();
if (cycles_hist && (compute != COMPUTE_CYCLES)) usage_with_options(diff_usage, options);
if (pdiff.stream) compute = COMPUTE_STREAM;
symbol__annotation_init();
if (symbol__init(NULL) < 0) return -1;
if (data_init(argc, argv) < 0) return -1;
if (check_file_brstack() < 0) return -1;
if ((compute == COMPUTE_CYCLES || compute == COMPUTE_STREAM) && !pdiff.has_br_stack) { return -1; }
if (compute == COMPUTE_STREAM) { symbol_conf.show_branchflag_count = true; symbol_conf.addr2line_disable_warn = true; callchain_param.mode = CHAIN_FLAT; callchain_param.key = CCKEY_SRCLINE; callchain_param.branch_callstack = 1; symbol_conf.use_callchain = true; callchain_register_param(&callchain_param); sort_order = "srcline,symbol,dso"; } else { if (ui_init() < 0) return -1;
sort__mode = SORT_MODE__DIFF; }
if (setup_sorting(/*evlist=*/NULL, perf_session__env(data__files[0].session)) < 0) usage_with_options(diff_usage, options);
setup_pager();
sort__setup_elide(NULL);
return __cmd_diff();}