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]
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