linux-kernel - Re: [PATCH] perf arm-spe: Report error if set frequency

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Message-ID: <20250227082251.GD1821331@e132581.arm.com>
Date: Thu, 27 Feb 2025 08:22:51 +0000
From: Leo Yan <leo.yan@....com>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>,
	James Clark <james.clark@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf arm-spe: Report error if set frequency

Hi Namhyung,

On Wed, Feb 26, 2025 at 11:05:08PM -0800, Namhyung Kim wrote:

[...]

> > > After:
> > >
> > >   perf record -F 100 -e arm_spe_0// -- sleep 1
> > >   Arm SPE: Frequency is not supported. Check manual 'man perf-record' on how to set period.
> > >
> > > Signed-off-by: Leo Yan <leo.yan@....com>
> >
> > Gentle ping.
> 
> Sorry for the late reply.
> 
> Isn't it just -c <period> to set period for Arm SPE?  If so, it'd be
> better to say that explicitly.

Yes, '-c' works for Arm SPE.  Will change for this.

Thanks,
Leo