From: Ingo Molnar <mingo@kernel.org>
To: Ian Rogers <irogers@google.com>
Cc: Mark Barnett <mark.barnett@arm.com>,
peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
namhyung@kernel.org, ben.gainey@arm.com, deepak.surti@arm.com,
ak@linux.intel.com, will@kernel.org, james.clark@arm.com,
mark.rutland@arm.com, alexander.shishkin@linux.intel.com,
jolsa@kernel.org, adrian.hunter@intel.com,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 0/5] A mechanism for efficient support for per-function metrics
Date: Sat, 12 Apr 2025 22:42:27 +0200 [thread overview]
Message-ID: <Z_rQMwKQDu6K66_r@gmail.com> (raw)
In-Reply-To: <CAP-5=fUukVQMRHUQ9Mpx38H-7VNLt4mDj-jaYgn8Tf4zjecD-A@mail.gmail.com>
* Ian Rogers <irogers@google.com> wrote:
> I don't think work should be gated on cleaning up perf report, top,
> etc. which still needs clean up for things like hybrid events. As the
> histograms should use the sample's period then I believe things
> should just work in much the same way as leader sampling can work.
> It'd be worth checking.
Yeah, so I think burst-profiling is basically still a single-event
profiling mode - with a tooling-side filter that skips the long-periods
and includes the burst-periods, and transforms all the statistics and
counts to make sense in the usual perf context.
Ie. I don't think it should be overly intrusive, and it could be a nice
performance & profiling quality feature we'd consider using by default
eventually.
Thanks,
Ingo
next prev parent reply other threads:[~2025-04-12 20:42 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-08 17:15 [PATCH v4 0/5] A mechanism for efficient support for per-function metrics mark.barnett
2025-04-08 17:15 ` [PATCH v4 1/5] perf: Record sample last_period before updating mark.barnett
2025-04-09 11:39 ` Ingo Molnar
2025-04-08 17:15 ` [PATCH v4 2/5] perf: Allow periodic events to alternate between two sample periods mark.barnett
2025-04-08 17:15 ` [PATCH v4 3/5] perf: Allow adding fixed random jitter to the sampling period mark.barnett
2025-04-09 10:54 ` Ingo Molnar
2025-04-09 14:24 ` Peter Zijlstra
2025-04-08 17:15 ` [PATCH v4 4/5] tools/perf: Modify event parser to support hf-period term mark.barnett
2025-04-08 17:15 ` [PATCH v4 5/5] tools/perf: Modify event parser to support hf-rand term mark.barnett
2025-04-09 11:38 ` [PATCH v4 0/5] A mechanism for efficient support for per-function metrics Ingo Molnar
2025-04-11 11:07 ` Mark Barnett
2025-04-11 17:34 ` Ian Rogers
2025-04-12 20:42 ` Ingo Molnar [this message]
2025-04-12 20:38 ` Ingo Molnar
2025-04-09 14:29 ` Peter Zijlstra
2025-04-11 9:44 ` Mark Barnett
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