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4d1792d0a2
The --lock-cgroup option shows lock contention stats break down by
cgroups.
Add LOCK_AGGR_CGROUP mode and use it instead of use_cgroup field.
$ sudo ./perf lock con -ab --lock-cgroup sleep 1
contended total wait max wait avg wait cgroup
8 15.70 us 6.34 us 1.96 us /
2 1.48 us 747 ns 738 ns /user.slice/.../app.slice/app-gnome-google\x2dchrome-6442.scope
1 848 ns 848 ns 848 ns /user.slice/.../session.slice/org.gnome.Shell@x11.service
1 220 ns 220 ns 220 ns /user.slice/.../session.slice/pipewire-pulse.service
For now, the cgroup mode only works with BPF (-b).
Committer notes:
Remove -g as it is used in the other tools with a clear meaning of
collect/show callchains. As agreed with Namhyung off list.
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/20230906174903.346486-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
51 lines
966 B
C
51 lines
966 B
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Data structures shared between BPF and tools. */
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#ifndef UTIL_BPF_SKEL_LOCK_DATA_H
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#define UTIL_BPF_SKEL_LOCK_DATA_H
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struct contention_key {
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u32 stack_id;
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u32 pid;
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u64 lock_addr_or_cgroup;
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};
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#define TASK_COMM_LEN 16
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struct contention_task_data {
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char comm[TASK_COMM_LEN];
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};
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/* default buffer size */
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#define MAX_ENTRIES 16384
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/*
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* Upper bits of the flags in the contention_data are used to identify
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* some well-known locks which do not have symbols (non-global locks).
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*/
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#define LCD_F_MMAP_LOCK (1U << 31)
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#define LCD_F_SIGHAND_LOCK (1U << 30)
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#define LCB_F_MAX_FLAGS (1U << 7)
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struct contention_data {
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u64 total_time;
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u64 min_time;
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u64 max_time;
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u32 count;
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u32 flags;
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};
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enum lock_aggr_mode {
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LOCK_AGGR_ADDR = 0,
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LOCK_AGGR_TASK,
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LOCK_AGGR_CALLER,
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LOCK_AGGR_CGROUP,
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};
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enum lock_class_sym {
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LOCK_CLASS_NONE,
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LOCK_CLASS_RQLOCK,
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};
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#endif /* UTIL_BPF_SKEL_LOCK_DATA_H */
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