From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: perf samples too long without perf running (?!?)
Date: Sat, 08 Mar 2014 08:51:18 +0100 [thread overview]
Message-ID: <1394265078.7215.11.camel@marge.simpson.net> (raw)
In-Reply-To: <CALCETrWSyhJHwfKSBT3giSb0AtvHFBR9PYmhFhFJa=Yabw25iw@mail.gmail.com>
On Fri, 2014-03-07 at 17:57 -0800, Andy Lutomirski wrote:
> 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?
14c63f17b1
I get those all the time too, just building kernels.
[ 598.583918] perf samples too long (2539 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
Darn nmi_watchdog is an expensive employee. Scarier are the ones from
2ab00456ea when using perf. Firing the dog makes it all batter.
-Mike
next prev parent reply other threads:[~2014-03-08 7:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-08 1:57 Andy Lutomirski
2014-03-08 7:51 ` Mike Galbraith [this message]
2014-03-08 9:13 ` Markus Trippelsdorf
2014-03-08 16:22 ` Andy Lutomirski
2014-03-08 17:12 ` Paul Bolle
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