Revision 9c29bcd189f4ab1644b7125713602532d0aefdb7 authored by Eric Dumazet on 21 September 2018, 22:27:48 UTC, committed by David S. Miller on 24 September 2018, 04:55:25 UTC
As diagnosed by Song Liu, ndo_poll_controller() can be very dangerous on loaded hosts, since the cpu calling ndo_poll_controller() might steal all NAPI contexts (for all RX/TX queues of the NIC). This capture can last for unlimited amount of time, since one cpu is generally not able to drain all the queues under load. mlx5 uses NAPI for TX completions, so we better let core networking stack call the napi->poll() to avoid the capture. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent a24b66c
builtin-diff.c
// 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 "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/symbol.h"
#include "util/util.h"
#include "util/data.h"
#include "util/config.h"
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <math.h>
/* 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__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 unsigned int sort_compute = 1;
static s64 compute_wdiff_w1;
static s64 compute_wdiff_w2;
enum {
COMPUTE_DELTA,
COMPUTE_RATIO,
COMPUTE_WEIGHTED_DIFF,
COMPUTE_DELTA_ABS,
COMPUTE_MAX,
};
const char *compute_names[COMPUTE_MAX] = {
[COMPUTE_DELTA] = "delta",
[COMPUTE_DELTA_ABS] = "delta-abs",
[COMPUTE_RATIO] = "ratio",
[COMPUTE_WEIGHTED_DIFF] = "wdiff",
};
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,
};
#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,
}
};
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 int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
struct addr_location al;
struct hists *hists = evsel__hists(evsel);
int ret = -1;
if (machine__resolve(machine, &al, sample) < 0) {
pr_warning("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample, true)) {
pr_warning("problem incrementing symbol period, skipping event\n");
goto out_put;
}
/*
* 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_tool 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,
.ordered_events = true,
.ordering_requires_timestamps = true,
};
static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
struct perf_evlist *evlist)
{
struct perf_evsel *e;
evlist__for_each_entry(evlist, e) {
if (perf_evsel__match2(evsel, e))
return e;
}
return NULL;
}
static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
{
struct perf_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 *root;
struct rb_node *next;
if (hists__has(hists, need_collapse))
root = &hists->entries_collapsed;
else
root = hists->entries_in;
next = rb_first(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(&he->rb_node_in, root);
hist_entry__delete(he);
}
}
}
static void hists__precompute(struct hists *hists)
{
struct rb_root *root;
struct rb_node *next;
if (hists__has(hists, need_collapse))
root = &hists->entries_collapsed;
else
root = hists->entries_in;
next = rb_first(root);
while (next != NULL) {
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);
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;
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);
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.file.path,
!d->idx ? "(Baseline)" : "");
fprintf(stdout, "#\n");
}
static void data_process(void)
{
struct perf_evlist *evlist_base = data__files[0].session->evlist;
struct perf_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 perf_evlist *evlist = d->session->evlist;
struct perf_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",
perf_evsel__name(evsel_base));
}
first = false;
if (verbose > 0 || ((data__files_cnt > 2) && !quiet))
data__fprintf();
/* Don't sort callchain for perf diff */
perf_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 __cmd_diff(void)
{
struct data__file *d;
int ret = -EINVAL, i;
data__for_each_file(i, d) {
d->session = perf_session__new(&d->data, false, &tool);
if (!d->session) {
pr_err("Failed to open %s\n", d->data.file.path);
ret = -1;
goto out_delete;
}
ret = perf_session__process_events(d->session);
if (ret) {
pr_err("Failed to process %s\n", d->data.file.path);
goto out_delete;
}
perf_evlist__collapse_resort(d->session->evlist);
}
data_process();
out_delete:
data__for_each_file(i, d) {
perf_session__delete(d->session);
data__free(d);
}
free(data__files);
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)",
"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('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_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 __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)
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);
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 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;
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
*/
data__hpp_register(d, i ? compute_2_hpp[compute] :
PERF_HPP_DIFF__BASELINE);
/*
* 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;
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->file.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 (symbol__init(NULL) < 0)
return -1;
if (data_init(argc, argv) < 0)
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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