From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Namhyung Kim <namhyung@kernel.org>
Cc: 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, Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH v2] perf lock contention: Add -J/--inject-delay option
Date: Fri, 9 May 2025 17:15:27 -0300 [thread overview]
Message-ID: <aB5iXwMTs85nrioq@x1> (raw)
In-Reply-To: <20250509171950.183591-1-namhyung@kernel.org>
On Fri, May 09, 2025 at 10:19:50AM -0700, Namhyung Kim wrote:
> This is to slow down lock acquistion (on contention locks) deliberately.
> A possible use case is to estimate impact on application performance by
> optimization of kernel locking behavior. By delaying the lock it can
> simulate the worse condition as a control group, and then compare with
> the current behavior as a optimized condition.
Thanks, tested and applied.
- Arnaldo
prev parent reply other threads:[~2025-05-09 20:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-09 17:19 [PATCH v2] perf lock contention: Add -J/--inject-delay option Namhyung Kim
2025-05-09 20:15 ` Arnaldo Carvalho de Melo [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=aB5iXwMTs85nrioq@x1 \
--to=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=bpf@vger.kernel.org \
--cc=eranian@google.com \
--cc=irogers@google.com \
--cc=jolsa@kernel.org \
--cc=kan.liang@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
--cc=song@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox