Re: perf samples too long without perf running (?!?)

[Markus Trippelsdorf]

On 2014.03.08 at 08:51 +0100, Mike Galbraith wrote:
> 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.

I have:
 echo 0 > /proc/sys/kernel/perf_cpu_time_max_percent
in my local startup script since that commit.

-- 
Markus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/