linux-kernel - perf samples too long without perf running (?!?)

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Message-ID: <CALCETrWSyhJHwfKSBT3giSb0AtvHFBR9PYmhFhFJa=Yabw25iw@mail.gmail.com>
Date:	Fri, 7 Mar 2014 17:57:09 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: perf samples too long without perf running (?!?)

On recent (3.13) kernels, I'm frequently getting messages like:

perf samples too long (2503 > 2500), lowering
kernel.perf_event_max_sample_rate to 50000

a few seconds to minutes after bootup.  As far as I know, I'm not
using perf.  What's going on here?

--Andy
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