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linux/tools/perf/builtin-diff.c

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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 <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;
};
/* 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 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,
};
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(char *opt)
{
char *w1_str = opt;
char *w2_str;
int ret = -EINVAL;
if (!opt)
goto out;
w2_str = strchr(opt, ',');
if (!w2_str)
goto out;
*w2_str++ = 0x0;
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(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;
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);
}
struct hist_entry_ops block_hist_ops = {
.new = block_hist_zalloc,
.free = block_hist_free,
};
static int diff__process_sample_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct evsel *evsel,
struct machine *machine)
{
struct perf_diff *pdiff = container_of(tool, struct perf_diff, tool);
struct addr_location al;
struct hists *hists = evsel__hists(evsel);
int ret = -1;
if (perf_time__ranges_skip_sample(pdiff->ptime_range, pdiff->range_num,
sample->time)) {
return 0;
}
if (machine__resolve(machine, &al, sample) < 0) {
pr_warning("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) {
ret = 0;
goto out_put;
}
if (compute != COMPUTE_CYCLES) {
if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample,
true)) {
pr_warning("problem incrementing symbol period, "
"skipping event\n");
goto out_put;
}
} else {
if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
NULL, NULL, sample, true)) {
pr_warning("problem incrementing symbol period, "
"skipping event\n");
goto out_put;
}
hist__account_cycles(sample->branch_stack, &al, sample, false,
NULL);
}
/*
* 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_put:
addr_location__put(&al);
return ret;
}
static struct perf_diff pdiff = {
.tool = {
.sample = diff__process_sample_event,
.mmap = perf_event__process_mmap,
.mmap2 = perf_event__process_mmap2,
.comm = perf_event__process_comm,
.exit = perf_event__process_exit,
.fork = perf_event__process_fork,
.lost = perf_event__process_lost,
.namespaces = perf_event__process_namespaces,
.cgroup = perf_event__process_cgroup,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
};
static struct evsel *evsel_match(struct evsel *evsel,
struct evlist *evlist)
{
struct evsel *e;
evlist__for_each_entry(evlist, e) {
if (evsel__match2(evsel, e))
return e;
}
return NULL;
}
static void perf_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);
}
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);
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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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_t
hist_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 void data__free(struct data__file *d)
{
int col;
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, false, &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, false, &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;
}
perf_evlist__collapse_resort(d->session->evlist);
if (pdiff.ptime_range)
zfree(&pdiff.ptime_range);
}
data_process();
out_delete:
data__for_each_file(i, d) {
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 message"),
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",
"Look for files with symbols relative to this directory",
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_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.disable_add2line_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 ((strncmp(start_line, SRCLINE_UNKNOWN, strlen(SRCLINE_UNKNOWN)) != 0) &&
(strncmp(end_line, SRCLINE_UNKNOWN, strlen(SRCLINE_UNKNOWN)) != 0)) {
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);
}
free_srcline(start_line);
free_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 void
hpp__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 void
hpp__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 realted 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 = zalloc(sizeof(*data__files) * data__files_cnt);
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_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);
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 && !pdiff.has_br_stack)
return -1;
if (ui_init() < 0)
return -1;
sort__mode = SORT_MODE__DIFF;
if (setup_sorting(NULL) < 0)
usage_with_options(diff_usage, options);
setup_pager();
sort__setup_elide(NULL);
return __cmd_diff();
}
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