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The -G/--cgroup-filter is to limit lock contention collection on the
tasks in the specific cgroups only.
$ sudo ./perf lock con -abt -G /user.slice/.../vte-spawn-52221fb8-b33f-4a52-b5c3-e35d1e6fc0e0.scope \
./perf bench sched messaging
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 10 groups == 400 processes run
Total time: 0.174 [sec]
contended total wait max wait avg wait pid comm
4 114.45 us 60.06 us 28.61 us 214847 sched-messaging
2 111.40 us 60.84 us 55.70 us 214848 sched-messaging
2 106.09 us 59.42 us 53.04 us 214837 sched-messaging
1 81.70 us 81.70 us 81.70 us 214709 sched-messaging
68 78.44 us 6.83 us 1.15 us 214633 sched-messaging
69 73.71 us 2.69 us 1.07 us 214632 sched-messaging
4 72.62 us 60.83 us 18.15 us 214850 sched-messaging
2 71.75 us 67.60 us 35.88 us 214840 sched-messaging
2 69.29 us 67.53 us 34.65 us 214804 sched-messaging
2 69.00 us 68.23 us 34.50 us 214826 sched-messaging
...
Export cgroup__new() function as it's needed from outside.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230906174903.346486-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __CGROUP_H__
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#define __CGROUP_H__
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#include <linux/compiler.h>
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#include <linux/refcount.h>
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#include <linux/rbtree.h>
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#include "util/env.h"
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struct option;
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struct cgroup {
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struct rb_node node;
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u64 id;
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char *name;
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int fd;
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refcount_t refcnt;
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};
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extern int nr_cgroups; /* number of explicit cgroups defined */
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extern bool cgrp_event_expanded;
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struct cgroup *cgroup__get(struct cgroup *cgroup);
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void cgroup__put(struct cgroup *cgroup);
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struct evlist;
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struct rblist;
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struct cgroup *cgroup__new(const char *name, bool do_open);
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struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
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int evlist__expand_cgroup(struct evlist *evlist, const char *cgroups,
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struct rblist *metric_events, bool open_cgroup);
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void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
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int parse_cgroups(const struct option *opt, const char *str, int unset);
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struct cgroup *cgroup__findnew(struct perf_env *env, uint64_t id,
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const char *path);
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struct cgroup *cgroup__find(struct perf_env *env, uint64_t id);
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struct cgroup *__cgroup__find(struct rb_root *root, uint64_t id);
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void perf_env__purge_cgroups(struct perf_env *env);
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#ifdef HAVE_FILE_HANDLE
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int read_cgroup_id(struct cgroup *cgrp);
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#else
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static inline int read_cgroup_id(struct cgroup *cgrp __maybe_unused)
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{
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return -1;
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}
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#endif /* HAVE_FILE_HANDLE */
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/* read all cgroups in the system and save them in the rbtree */
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void read_all_cgroups(struct rb_root *root);
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int cgroup_is_v2(const char *subsys);
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#endif /* __CGROUP_H__ */
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