linux-kernel - Re: [PATCH V3 00/22] perf tools: Introduce an abstraction for Instruction Tracing

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Message-ID: <20141215154248.GI9845@kernel.org>
Date:	Mon, 15 Dec 2014 12:42:48 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	David Ahern <dsahern@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH V3 00/22] perf tools: Introduce an abstraction for
 Instruction Tracing

Em Mon, Dec 15, 2014 at 04:13:06PM +0100, Jiri Olsa escreveu:
> On Mon, Dec 15, 2014 at 08:09:53AM -0700, David Ahern wrote:
> > On 12/15/14 2:08 AM, Adrian Hunter wrote:
> > >On 12/12/14 20:53, Arnaldo Carvalho de Melo wrote:
> > >>Em Fri, Dec 12, 2014 at 09:13:25AM -0700, David Ahern escreveu:
> > >>>On 12/12/14 6:47 AM, Adrian Hunter wrote:
> > >>>>Here is V3 of some more preparatory patches for Intel PT
> > >>>>that introduce an abstraction for Instruction tracing.
> > >>
> > >>>This is an x86-Intel only feature correct? If that is the case then the code
> > >>>should be not compiled for other architectures.
> > >
> > >It is not that simple. In the case of recording, it is not needed for
> > >architectures that don't support it, but in the case of session processing
> > >any architecture can (or should be able to) process the perf.data file of
> > >any other architecture.
> > 
> > Understood. perf is a kitchen sink tool and the size of binaries for
> > embedded deployments is getting out of hand. e.g., for our PPC based systems
> > the entire root filesystem is 46M with perf taking up almost 3M of that
> > (stripped size too). New features need config options so user's can decide
> > the feature scope of what they are building. And we need to get the kconfig
> > style builds committed as well.
> 
> yep.. I'm on that kconfig stuff ;-)

Cool, we need that thing!

- Arnaldo
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