On Wed, Jul 10, 2013 at 11:39:50AM -0400, Vince Weaver wrote:
> On Wed, 10 Jul 2013, Dave Jones wrote:
>
> > Something is really fucked up in the kernel side of perf.
> > I get this right after booting..
> >
> > [ 114.516619] perf samples too long (4262 > 2500), lowering
> > kernel.perf_event_max_sample_rate to 50000
> >
> > That's before I even get a chance to log in, so I'm pretty sure perf isn't
> > even being run.
> >
> > And this is just booting up my desktop, not fuzzing.
>
> This is probably related to the problem described in the thread
> perf: fix interrupt handler timing harness
> http://comments.gmane.org/gmane.linux.kernel/1520775
> which in theory has a fix. Not sure why it'd trigger during boot.
Ah, missed that thread. Thanks for the pointer. That looks important,
and might actually explain some of the other oddness I've been seeing.
> NMI watchdog?
likely.
Davek
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