From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Howard Chu <howardchu95@gmail.com>,
Ian Rogers <irogers@google.com>,
Kan Liang <kan.liang@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-perf-users@vger.kernel.org, Song Liu <song@kernel.org>,
bpf@vger.kernel.org
Subject: Re: [PATCH v4 1/2] perf trace: Implement syscall summary in BPF
Date: Wed, 23 Apr 2025 17:50:48 -0300 [thread overview]
Message-ID: <aAlSqGN9Sx4x6_sI@x1> (raw)
In-Reply-To: <aAkmY0hLXarmCSIA@google.com>
On Wed, Apr 23, 2025 at 10:41:55AM -0700, Namhyung Kim wrote:
> Hi Arnaldo,
>
> On Wed, Apr 23, 2025 at 01:26:48PM -0300, Arnaldo Carvalho de Melo wrote:
> > On Fri, Mar 28, 2025 at 06:46:36PM -0700, Howard Chu wrote:
> > > On Tue, Mar 25, 2025 at 9:40 PM Namhyung Kim <namhyung@kernel.org> wrote:
> > > > syscall calls errors total min avg max stddev
> > > > (msec) (msec) (msec) (msec) (%)
> > > > --------------- -------- ------ -------- --------- --------- --------- ------
> > > > epoll_wait 561 0 4530.843 0.000 8.076 520.941 18.75%
> > > > futex 693 45 4317.231 0.000 6.230 500.077 21.98%
> > > > poll 300 0 1040.109 0.000 3.467 120.928 17.02%
> > > > clock_nanosleep 1 0 1000.172 1000.172 1000.172 1000.172 0.00%
> > > > ppoll 360 0 872.386 0.001 2.423 253.275 41.91%
> > > > epoll_pwait 14 0 384.349 0.001 27.453 380.002 98.79%
> > > > pselect6 14 0 108.130 7.198 7.724 8.206 0.85%
> > > > nanosleep 39 0 43.378 0.069 1.112 10.084 44.23%
> > > > ...
> >
> > I added the following to align sched_[gs]etaffinity,
>
> Thanks for processing the patch and updating this. But I'm afraid there
> are more syscalls with longer names and this is not the only place to
> print the syscall names. Also I think we need to update length of the
> time fields. So I prefer handling them in a separate patch later.
Fair enough, I'm leaving the patch as-is.
- Arnaldo
next prev parent reply other threads:[~2025-04-23 20:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-26 4:40 [PATCH v4 1/2] perf trace: Implement syscall summary in BPF Namhyung Kim
2025-03-26 4:40 ` [PATCH v4 2/2] perf test: Add perf trace summary test Namhyung Kim
2025-03-29 1:48 ` Howard Chu
2025-03-29 1:46 ` [PATCH v4 1/2] perf trace: Implement syscall summary in BPF Howard Chu
2025-04-23 16:19 ` Arnaldo Carvalho de Melo
2025-04-23 16:26 ` Arnaldo Carvalho de Melo
2025-04-23 17:41 ` Namhyung Kim
2025-04-23 20:50 ` Arnaldo Carvalho de Melo [this message]
2025-04-24 22:06 ` Arnaldo Carvalho de Melo
2025-04-25 21:51 ` Namhyung Kim
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