linux-kernel - Re: [PATCH 10/10] perf record: Add an option to force per-cpu mmaps

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Message-ID: <20131115123013.GF10456@twins.programming.kicks-ass.net>
Date:	Fri, 15 Nov 2013 13:30:13 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Adrian Hunter <adrian.hunter@...el.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH 10/10] perf record: Add an option to force per-cpu mmaps

On Fri, Nov 15, 2013 at 01:05:25PM +0100, Ingo Molnar wrote:
> Do the first variant, 'perf record <cmd>', already use per CPU 
> buffers?

Yes.. this is required for inheritance to work.
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