linux-kernel - Re: [RFC PATCH 00/20] Coresight integration with perf

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Message-ID: <CANLsYkxitWS0hUXL_=T-V8qSXKvtyUc8F7NknDu16Xy0nN_o0A@mail.gmail.com>
Date:	Thu, 1 Oct 2015 16:07:09 -0600
From:	Mathieu Poirier <mathieu.poirier@...aro.org>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>, a.p.zijlstra@...llo.nl,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>, Jon Corbet <corbet@....net>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Chunyan Zhang <zhang.chunyan@...aro.org>,
	Mike Leach <mike.leach@....com>, Tor Jeremiassen <tor@...com>,
	Al Grant <al.grant@....com>,
	Paweł Moll <pawel.moll@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, linux-doc@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 00/20] Coresight integration with perf

On 30 September 2015 at 02:52, Alexander Shishkin
<alexander.shishkin@...ux.intel.com> wrote:
> Mathieu Poirier <mathieu.poirier@...aro.org> writes:
>
>> This patchset aims to integrate configuration and control of
>> the Coresight tracers with the perf sub-system.
>>
>> The goal is to use PMUs to represent tracers and the auxiliary
>> buffer enhancement to collect processor traces.  As such a lot
>> of work is done to move the current Coresight sysFS oriented
>> configuration and control commands to perf's AUX API.
>>
>> For the time being the work concentrates on ETMv3 and ETB1.0
>> sink buffers.  Work on ETMv4 and other type of sink buffers
>> will follow once a foundation has been established.
>>
>> Enhancement to the perf command line tool can be found here [1].
>> It is based on v4.2 but a rebase to v4.3-rcX will be available
>> shortly.
>>
>> Best regards,
>> Mathieu
>>
>> [1]. https://git.linaro.org/people/mathieu.poirier/coresight.git/shortlog/refs/heads/perf-v4.2
>
> I had a peek there -- didn't see an actual decoder for the ETM/PTM
> binary stream or did I miss it somehow?

A stream decoder is not included in this patch set but a couple of
people are currently working on it.

>
> Thanks,
> --
> Alex
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