Em Mon, Dec 19, 2022 at 12:17:26PM -0800, Namhyung Kim escreveu: > Hello, > > This patchset adds a couple of filters to perf lock contention command. Thanks, applied. - Arnaldo > The -Y/--type-filter is to filter by lock types like spinlock or mutex. > > $ sudo ./perf lock con -ab -Y spinlock -E 3 -- ./perf bench sched messaging > # Running 'sched/messaging' benchmark: > # 20 sender and receiver processes per group > # 10 groups == 400 processes run > > Total time: 0.167 [sec] > contended total wait max wait avg wait type caller > > 11 669.31 us 107.17 us 60.85 us spinlock remove_wait_queue+0x14 > 10 586.85 us 87.62 us 58.68 us spinlock prepare_to_wait+0x27 > 186 497.36 us 12.94 us 2.67 us spinlock try_to_wake_up+0x1f5 > > For the same workload, you can see the rwlock results only like below. > > $ sudo ./perf lock con -ab -Y rwlock -E 3 -- ./perf bench sched messaging > # Running 'sched/messaging' benchmark: > # 20 sender and receiver processes per group > # 10 groups == 400 processes run > > Total time: 0.171 [sec] > contended total wait max wait avg wait type caller > > 20 142.11 us 17.10 us 7.11 us rwlock:W do_exit+0x36d > 3 26.49 us 12.04 us 8.83 us rwlock:W release_task+0x6e > 5 12.46 us 5.12 us 2.49 us rwlock:R do_wait+0x8b > > The -L/--lock-filter is to filter by lock address or name. You can use > the existing -l/--lock-addr option to get the info. > > $ sudo ./perf lock con -abl -- ./perf bench sched messaging 2>&1 | grep tasklist_lock > 25 39.78 us 16.51 us 1.59 us ffffffff9d006080 tasklist_lock > > And use it with -L option like below. > > $ sudo ./perf lock con -ab -L tasklist_lock -- ./perf bench sched messaging 2>&1 > # 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 type caller > > 22 227.18 us 24.16 us 10.33 us rwlock:W do_exit+0x36d > 3 26.12 us 18.03 us 8.71 us rwlock:W release_task+0x6e > > Passing the address is supported too. > > $ sudo ./perf lock con -ab -L ffffffff9d006080 -- ./perf bench sched messaging 2>&1 > # Running 'sched/messaging' benchmark: > # 20 sender and receiver processes per group > # 10 groups == 400 processes run > > Total time: 0.190 [sec] > contended total wait max wait avg wait type caller > > 28 276.62 us 16.90 us 9.88 us rwlock:W do_exit+0x36d > 4 22.36 us 7.04 us 5.59 us rwlock:R do_wait+0x8b > 2 10.51 us 5.38 us 5.25 us rwlock:W release_task+0x6e > > You can get it from 'perf/lock-filter-v1' branch in > > git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git > > Thanks, > Namhyung > > > Namhyung Kim (6): > perf lock contention: Factor out lock_type_table > perf lock contention: Add -Y/--type-filter option > perf lock contention: Support lock type filtering for BPF > perf lock contention: Add -L/--lock-filter option > perf lock contention: Support lock addr/name filtering for BPF > perf test: Update perf lock contention test > > tools/perf/Documentation/perf-lock.txt | 27 +- > tools/perf/builtin-lock.c | 305 ++++++++++++++++-- > tools/perf/tests/shell/lock_contention.sh | 58 +++- > tools/perf/util/bpf_lock_contention.c | 55 +++- > .../perf/util/bpf_skel/lock_contention.bpf.c | 38 ++- > tools/perf/util/lock-contention.h | 10 + > 6 files changed, 451 insertions(+), 42 deletions(-) > > > base-commit: 51c4f2bf5397b34b79a6712221606e0ab2e6f7ed > -- > 2.39.0.314.g84b9a713c41-goog -- - Arnaldo
