linux-kernel - Re: [PATCH v4 0/5] A mechanism for efficient support for per-function metrics

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Message-ID: <20250409142900.GD9833@noisy.programming.kicks-ass.net>
Date: Wed, 9 Apr 2025 16:29:00 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: mark.barnett@....com
Cc: mingo@...hat.com, acme@...nel.org, namhyung@...nel.org,
	irogers@...gle.com, ben.gainey@....com, deepak.surti@....com,
	ak@...ux.intel.com, will@...nel.org, james.clark@....com,
	mark.rutland@....com, alexander.shishkin@...ux.intel.com,
	jolsa@...nel.org, adrian.hunter@...el.com,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 0/5] A mechanism for efficient support for
 per-function metrics

On Tue, Apr 08, 2025 at 06:15:25PM +0100, mark.barnett@....com wrote:

>     perf record -T --sample-cpu --call-graph fp,4 --user-callchains \
>         -k CLOCK_MONOTONIC_RAW \
>         -e '{cycles/period=999700,alt-period=300/,instructions,branch-misses,cache-references,cache-misses}:uS' \
>         benchmark 0 1

>     perf record -i -vvv -e '{cycles/period=999700,alt-period=300/,instructions}:uS' benchmark 0 1

Should be updated to read something like:

	cycles/period=1000000,hf-period=300/

right?

Also, cycles/freq=1000,hf-period=300/ should now also work, right?

Anyway, the kernel bits look good to me now (with the nits fixed), so:

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>