linux-kernel - Re: [RFC/PATCHSET 0/8] perf tools: Minimal build without libelf dependency (v2)

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Message-ID: <1340377510.1478.10.camel@leonhard>
Date:	Sat, 23 Jun 2012 00:05:10 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>
Subject: Re: [RFC/PATCHSET 0/8] perf tools: Minimal build without libelf
 dependency (v2)

Hi Peter,

2012-06-22 (금), 11:47 +0200, Peter Zijlstra:
> On Fri, 2012-06-22 at 14:37 +0900, Namhyung Kim wrote:
> > And then I realized that the perf record needs to know about the
> > build-id's anyway. :( So I implemented a poor man's version of elf
> > parser only for parsing the build-id info. 
> 
> Why? the very first versions didn't know about any of that nonsense :-)
> It works just fine as long as you don't go change binaries around.
> 
> That said, you did the work already, so no objection, just saying
> builtids aren't that important.

I'm not sure I understood you correctly. But 'perf record' needs to know
about the build-id's to save them to perf.data for 'perf report' later.
And 'perf archive' also needs to know about them to select necessary
binaries for the session.

-- 
Regards,
Namhyung Kim


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