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Subject: Re: [PATCH] perf: implement recording/reporting per-cpu samples
From: Peter Zijlstra <peterz@infradead.org>
To: Arun Sharma <aruns@google.com>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, paulus@samba.org,
       davem@davemloft.net, fweisbec@gmail.com
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Date: Mon, 03 May 2010 22:42:36 +0200
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On Mon, 2010-05-03 at 13:38 -0700, Arun Sharma wrote:
> Enable PERF_SAMPLE_CPU by default. Implement --sort cpu.

Why? The downside is that you unconditionally grow each sample and thus
increase the overhead for something that doesn't make sense for the
normal (task-inherit) case.