mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-09 20:14:09 +08:00
38fe0e0156
Move evsel::idx to perf_evsel::idx, so we can move the group interface to libperf. Committer notes: Fixup evsel->idx usage in tools/perf/util/bpf_counter_cgroup.c, that appeared in my tree in my local tree. Also fixed up these: $ find tools/perf/ -name "*.[ch]" | xargs grep 'evsel->idx' tools/perf/ui/gtk/annotate.c: evsel->idx + i); tools/perf/ui/gtk/annotate.c: evsel->idx); $ That running 'make -C tools/perf build-test' caught. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Requested-by: Shunsuke Nakamura <nakamura.shun@fujitsu.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20210706151704.73662-3-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
343 lines
8.1 KiB
C
343 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Compare and figure out the top N hottest streams
|
|
* Copyright (c) 2020, Intel Corporation.
|
|
* Author: Jin Yao
|
|
*/
|
|
|
|
#include <inttypes.h>
|
|
#include <stdlib.h>
|
|
#include <linux/zalloc.h>
|
|
#include "debug.h"
|
|
#include "hist.h"
|
|
#include "sort.h"
|
|
#include "stream.h"
|
|
#include "evlist.h"
|
|
|
|
static void evsel_streams__delete(struct evsel_streams *es, int nr_evsel)
|
|
{
|
|
for (int i = 0; i < nr_evsel; i++)
|
|
zfree(&es[i].streams);
|
|
|
|
free(es);
|
|
}
|
|
|
|
void evlist_streams__delete(struct evlist_streams *els)
|
|
{
|
|
evsel_streams__delete(els->ev_streams, els->nr_evsel);
|
|
free(els);
|
|
}
|
|
|
|
static struct evlist_streams *evlist_streams__new(int nr_evsel,
|
|
int nr_streams_max)
|
|
{
|
|
struct evlist_streams *els;
|
|
struct evsel_streams *es;
|
|
|
|
els = zalloc(sizeof(*els));
|
|
if (!els)
|
|
return NULL;
|
|
|
|
es = calloc(nr_evsel, sizeof(struct evsel_streams));
|
|
if (!es) {
|
|
free(els);
|
|
return NULL;
|
|
}
|
|
|
|
for (int i = 0; i < nr_evsel; i++) {
|
|
struct evsel_streams *s = &es[i];
|
|
|
|
s->streams = calloc(nr_streams_max, sizeof(struct stream));
|
|
if (!s->streams)
|
|
goto err;
|
|
|
|
s->nr_streams_max = nr_streams_max;
|
|
s->evsel_idx = -1;
|
|
}
|
|
|
|
els->ev_streams = es;
|
|
els->nr_evsel = nr_evsel;
|
|
return els;
|
|
|
|
err:
|
|
evsel_streams__delete(es, nr_evsel);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* The cnodes with high hit number are hot callchains.
|
|
*/
|
|
static void evsel_streams__set_hot_cnode(struct evsel_streams *es,
|
|
struct callchain_node *cnode)
|
|
{
|
|
int i, idx = 0;
|
|
u64 hit;
|
|
|
|
if (es->nr_streams < es->nr_streams_max) {
|
|
i = es->nr_streams;
|
|
es->streams[i].cnode = cnode;
|
|
es->nr_streams++;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Considering a few number of hot streams, only use simple
|
|
* way to find the cnode with smallest hit number and replace.
|
|
*/
|
|
hit = (es->streams[0].cnode)->hit;
|
|
for (i = 1; i < es->nr_streams; i++) {
|
|
if ((es->streams[i].cnode)->hit < hit) {
|
|
hit = (es->streams[i].cnode)->hit;
|
|
idx = i;
|
|
}
|
|
}
|
|
|
|
if (cnode->hit > hit)
|
|
es->streams[idx].cnode = cnode;
|
|
}
|
|
|
|
static void update_hot_callchain(struct hist_entry *he,
|
|
struct evsel_streams *es)
|
|
{
|
|
struct rb_root *root = &he->sorted_chain;
|
|
struct rb_node *rb_node = rb_first(root);
|
|
struct callchain_node *cnode;
|
|
|
|
while (rb_node) {
|
|
cnode = rb_entry(rb_node, struct callchain_node, rb_node);
|
|
evsel_streams__set_hot_cnode(es, cnode);
|
|
rb_node = rb_next(rb_node);
|
|
}
|
|
}
|
|
|
|
static void init_hot_callchain(struct hists *hists, struct evsel_streams *es)
|
|
{
|
|
struct rb_node *next = rb_first_cached(&hists->entries);
|
|
|
|
while (next) {
|
|
struct hist_entry *he;
|
|
|
|
he = rb_entry(next, struct hist_entry, rb_node);
|
|
update_hot_callchain(he, es);
|
|
next = rb_next(&he->rb_node);
|
|
}
|
|
|
|
es->streams_hits = callchain_total_hits(hists);
|
|
}
|
|
|
|
static int evlist__init_callchain_streams(struct evlist *evlist,
|
|
struct evlist_streams *els)
|
|
{
|
|
struct evsel_streams *es = els->ev_streams;
|
|
struct evsel *pos;
|
|
int i = 0;
|
|
|
|
BUG_ON(els->nr_evsel < evlist->core.nr_entries);
|
|
|
|
evlist__for_each_entry(evlist, pos) {
|
|
struct hists *hists = evsel__hists(pos);
|
|
|
|
hists__output_resort(hists, NULL);
|
|
init_hot_callchain(hists, &es[i]);
|
|
es[i].evsel_idx = pos->core.idx;
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct evlist_streams *evlist__create_streams(struct evlist *evlist,
|
|
int nr_streams_max)
|
|
{
|
|
int nr_evsel = evlist->core.nr_entries, ret = -1;
|
|
struct evlist_streams *els = evlist_streams__new(nr_evsel,
|
|
nr_streams_max);
|
|
|
|
if (!els)
|
|
return NULL;
|
|
|
|
ret = evlist__init_callchain_streams(evlist, els);
|
|
if (ret) {
|
|
evlist_streams__delete(els);
|
|
return NULL;
|
|
}
|
|
|
|
return els;
|
|
}
|
|
|
|
struct evsel_streams *evsel_streams__entry(struct evlist_streams *els,
|
|
int evsel_idx)
|
|
{
|
|
struct evsel_streams *es = els->ev_streams;
|
|
|
|
for (int i = 0; i < els->nr_evsel; i++) {
|
|
if (es[i].evsel_idx == evsel_idx)
|
|
return &es[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct stream *stream__callchain_match(struct stream *base_stream,
|
|
struct evsel_streams *es_pair)
|
|
{
|
|
for (int i = 0; i < es_pair->nr_streams; i++) {
|
|
struct stream *pair_stream = &es_pair->streams[i];
|
|
|
|
if (callchain_cnode_matched(base_stream->cnode,
|
|
pair_stream->cnode)) {
|
|
return pair_stream;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct stream *stream__match(struct stream *base_stream,
|
|
struct evsel_streams *es_pair)
|
|
{
|
|
return stream__callchain_match(base_stream, es_pair);
|
|
}
|
|
|
|
static void stream__link(struct stream *base_stream, struct stream *pair_stream)
|
|
{
|
|
base_stream->pair_cnode = pair_stream->cnode;
|
|
pair_stream->pair_cnode = base_stream->cnode;
|
|
}
|
|
|
|
void evsel_streams__match(struct evsel_streams *es_base,
|
|
struct evsel_streams *es_pair)
|
|
{
|
|
for (int i = 0; i < es_base->nr_streams; i++) {
|
|
struct stream *base_stream = &es_base->streams[i];
|
|
struct stream *pair_stream;
|
|
|
|
pair_stream = stream__match(base_stream, es_pair);
|
|
if (pair_stream)
|
|
stream__link(base_stream, pair_stream);
|
|
}
|
|
}
|
|
|
|
static void print_callchain_pair(struct stream *base_stream, int idx,
|
|
struct evsel_streams *es_base,
|
|
struct evsel_streams *es_pair)
|
|
{
|
|
struct callchain_node *base_cnode = base_stream->cnode;
|
|
struct callchain_node *pair_cnode = base_stream->pair_cnode;
|
|
struct callchain_list *base_chain, *pair_chain;
|
|
char buf1[512], buf2[512], cbuf1[256], cbuf2[256];
|
|
char *s1, *s2;
|
|
double pct;
|
|
|
|
printf("\nhot chain pair %d:\n", idx);
|
|
|
|
pct = (double)base_cnode->hit / (double)es_base->streams_hits;
|
|
scnprintf(buf1, sizeof(buf1), "cycles: %ld, hits: %.2f%%",
|
|
callchain_avg_cycles(base_cnode), pct * 100.0);
|
|
|
|
pct = (double)pair_cnode->hit / (double)es_pair->streams_hits;
|
|
scnprintf(buf2, sizeof(buf2), "cycles: %ld, hits: %.2f%%",
|
|
callchain_avg_cycles(pair_cnode), pct * 100.0);
|
|
|
|
printf("%35s\t%35s\n", buf1, buf2);
|
|
|
|
printf("%35s\t%35s\n",
|
|
"---------------------------",
|
|
"--------------------------");
|
|
|
|
pair_chain = list_first_entry(&pair_cnode->val,
|
|
struct callchain_list,
|
|
list);
|
|
|
|
list_for_each_entry(base_chain, &base_cnode->val, list) {
|
|
if (&pair_chain->list == &pair_cnode->val)
|
|
return;
|
|
|
|
s1 = callchain_list__sym_name(base_chain, cbuf1, sizeof(cbuf1),
|
|
false);
|
|
s2 = callchain_list__sym_name(pair_chain, cbuf2, sizeof(cbuf2),
|
|
false);
|
|
|
|
scnprintf(buf1, sizeof(buf1), "%35s\t%35s", s1, s2);
|
|
printf("%s\n", buf1);
|
|
pair_chain = list_next_entry(pair_chain, list);
|
|
}
|
|
}
|
|
|
|
static void print_stream_callchain(struct stream *stream, int idx,
|
|
struct evsel_streams *es, bool pair)
|
|
{
|
|
struct callchain_node *cnode = stream->cnode;
|
|
struct callchain_list *chain;
|
|
char buf[512], cbuf[256], *s;
|
|
double pct;
|
|
|
|
printf("\nhot chain %d:\n", idx);
|
|
|
|
pct = (double)cnode->hit / (double)es->streams_hits;
|
|
scnprintf(buf, sizeof(buf), "cycles: %ld, hits: %.2f%%",
|
|
callchain_avg_cycles(cnode), pct * 100.0);
|
|
|
|
if (pair) {
|
|
printf("%35s\t%35s\n", "", buf);
|
|
printf("%35s\t%35s\n",
|
|
"", "--------------------------");
|
|
} else {
|
|
printf("%35s\n", buf);
|
|
printf("%35s\n", "--------------------------");
|
|
}
|
|
|
|
list_for_each_entry(chain, &cnode->val, list) {
|
|
s = callchain_list__sym_name(chain, cbuf, sizeof(cbuf), false);
|
|
|
|
if (pair)
|
|
scnprintf(buf, sizeof(buf), "%35s\t%35s", "", s);
|
|
else
|
|
scnprintf(buf, sizeof(buf), "%35s", s);
|
|
|
|
printf("%s\n", buf);
|
|
}
|
|
}
|
|
|
|
static void callchain_streams_report(struct evsel_streams *es_base,
|
|
struct evsel_streams *es_pair)
|
|
{
|
|
struct stream *base_stream;
|
|
int i, idx = 0;
|
|
|
|
printf("[ Matched hot streams ]\n");
|
|
for (i = 0; i < es_base->nr_streams; i++) {
|
|
base_stream = &es_base->streams[i];
|
|
if (base_stream->pair_cnode) {
|
|
print_callchain_pair(base_stream, ++idx,
|
|
es_base, es_pair);
|
|
}
|
|
}
|
|
|
|
idx = 0;
|
|
printf("\n[ Hot streams in old perf data only ]\n");
|
|
for (i = 0; i < es_base->nr_streams; i++) {
|
|
base_stream = &es_base->streams[i];
|
|
if (!base_stream->pair_cnode) {
|
|
print_stream_callchain(base_stream, ++idx,
|
|
es_base, false);
|
|
}
|
|
}
|
|
|
|
idx = 0;
|
|
printf("\n[ Hot streams in new perf data only ]\n");
|
|
for (i = 0; i < es_pair->nr_streams; i++) {
|
|
base_stream = &es_pair->streams[i];
|
|
if (!base_stream->pair_cnode) {
|
|
print_stream_callchain(base_stream, ++idx,
|
|
es_pair, true);
|
|
}
|
|
}
|
|
}
|
|
|
|
void evsel_streams__report(struct evsel_streams *es_base,
|
|
struct evsel_streams *es_pair)
|
|
{
|
|
return callchain_streams_report(es_base, es_pair);
|
|
}
|