Em Fri, Dec 09, 2022 at 11:07:23AM -0800, Namhyung Kim escreveu: > Hello, > > This patchset adds two more aggregation modes for perf lock contention. Thanks, applied. - Arnaldo > The first one is the per-task mode with -t/--threads option. The option > was there already but it remained broken with BPF for a while. Now it > supports the output with and without BPF. > > # perf lock contention -a -b -t -- sleep 1 > contended total wait max wait avg wait pid comm > > 11 11.85 us 2.23 us 1.08 us 0 swapper > 2 11.13 us 10.22 us 5.56 us 749053 ThreadPoolForeg > 1 8.15 us 8.15 us 8.15 us 321353 Chrome_ChildIOT > 2 2.73 us 1.77 us 1.37 us 320761 Chrome_ChildIOT > 1 1.40 us 1.40 us 1.40 us 320502 chrome > 1 379 ns 379 ns 379 ns 321227 chrome > > The other one is the per-lock-instance mode with -l/--lock-addr option. > If the lock has a symbol, it will be displayed as well. > > # perf lock contention -a -b -l -- sleep 1 > contended total wait max wait avg wait address symbol > > 3 4.79 us 2.33 us 1.60 us ffffffffbaed50c0 rcu_state > 4 4.19 us 1.62 us 1.05 us ffffffffbae07a40 jiffies_lock > 1 1.94 us 1.94 us 1.94 us ffff9262277861e0 > 1 387 ns 387 ns 387 ns ffff9260bfda4f60 > > It's based on the current acme/tmp.perf/core branch. > You can find the code in the 'perf/lock-con-aggr-v1' branch in > > git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git > > Thanks, > Namhyung > > > Namhyung Kim (4): > perf lock contention: Add lock_data.h for common data > perf lock contention: Implement -t/--threads option for BPF > perf lock contention: Add -l/--lock-addr option > perf test: Update perf lock contention test > > tools/perf/Documentation/perf-lock.txt | 4 + > tools/perf/builtin-lock.c | 95 ++++++++++++++----- > tools/perf/tests/shell/lock_contention.sh | 48 ++++++++++ > tools/perf/util/bpf_lock_contention.c | 72 ++++++++++---- > .../perf/util/bpf_skel/lock_contention.bpf.c | 67 +++++++++---- > tools/perf/util/bpf_skel/lock_data.h | 30 ++++++ > tools/perf/util/lock-contention.h | 1 + > 7 files changed, 255 insertions(+), 62 deletions(-) > create mode 100644 tools/perf/util/bpf_skel/lock_data.h > > > base-commit: b22802e295a80ec16e355d7208d2fbbd7bbc1b7a > -- > 2.39.0.rc1.256.g54fd8350bd-goog -- - Arnaldo
