linux-kernel - Re: [PATCH v4] perf lock contention: skip traceiter functions

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Message-ID: <ZfydJzGgz4qy7Inh@x1>
Date: Thu, 21 Mar 2024 17:48:39 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Anne Macedo <retpolanne@...teo.net>
Cc: Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>, Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] perf lock contention: skip traceiter functions

On Thu, Mar 21, 2024 at 04:58:20PM -0300, Arnaldo Carvalho de Melo wrote:
> Thanks, testing it now on x86_64 and aarch64, will apply it then.

Done, applied, on aarch64:

root@...-rk3399-pc:~# perf lock contention --use-bpf -a find / > /dev/null
 contended   total wait     max wait     avg wait         type   caller

         6      6.03 s       6.03 s       1.00 s      spinlock   __tick_broadcast_oneshot_control+0xc0
        19    811.74 ms    621.76 ms     42.72 ms     spinlock   rcu_core+0xec
         2    201.76 ms    201.75 ms    100.88 ms     spinlock   sugov_update_shared+0x44
         6      7.80 ms      2.35 ms      1.30 ms        mutex   regulator_lock_recursive+0x144
         1    702.63 us    702.63 us    702.63 us      rwsem:W   __btrfs_tree_lock+0x2c
         4     62.42 us     18.96 us     15.60 us     spinlock   tick_do_update_jiffies64+0x44
         2     39.96 us     22.17 us     19.98 us     spinlock   __tick_broadcast_oneshot_control+0xc0
         2     33.83 us     18.08 us     16.92 us        mutex   mmc_blk_rw_wait+0x138
         1     21.58 us     21.58 us     21.58 us     spinlock   sugov_update_shared+0x44
         1     16.92 us     16.92 us     16.92 us     spinlock   cpu_pm_enter+0x34
         1     16.04 us     16.04 us     16.04 us        mutex   clk_prepare_lock+0x4c
root@...-rk3399-pc:~# uname -a
Linux roc-rk3399-pc 6.1.68-12200-g1c40dda3081e #1 SMP PREEMPT_DYNAMIC Thu Dec 14 04:02:49 EST 2023 aarch64 aarch64 aarch64 GNU/Linux
root@...-rk3399-pc:~#

its in tmp.perf-tools-next, will move to perf-tools-next in the next batch, after build
tests together with other patches.

Thanks!

- Arnaldo