linux-kernel - Re: [PATCH 0/4] perf tools: New comm infrastructure

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Date:	Fri, 13 Sep 2013 08:59:02 -0700
From:	David Ahern <dsahern@...il.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
CC:	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Stephane Eranian <eranian@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 0/4] perf tools: New comm infrastructure

On 9/13/13 5:43 AM, Frederic Weisbecker wrote:
>   The only way would be perhaps to be able to limit the deepness
> of the callchain branches.

I was thinking about such a feature two days ago. Max callchain depth is 
set to 255 at compile time which can generate huge event sizes. perf 
needs to allow the user to specify max depth for an event at less than that.

David
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