On Mon, Apr 8, 2013 at 4:26 AM, Ozan Çağlayan <ozan...@gmail.com> wrote:
> Hi,
>
> I don't know where to start for debugging but current rawhide on my
> SandyBridge laptop is barely usable. Even a window switch takes 1-2
> seconds. I looked over powertop and top outputs, load average when
> idle (even no gnome-terminal, ran the commands on VT) can be between
> 0.8-1.1. Xorg is generally at the of top output, 30-40% CPU usage on
> average. I also see some irq related stuff for iwlwifi in top output.
> I was passing enable_rc6=0 to i915 but removed that but that didn't
> help too.
>
> Is there a known issue with 3.9 kernel that you are aware of? What
> should I investigate further before opening a bug in bugzilla?

Rawhide kernels have debugging options enabled, which can cause
significant slowdowns in many situations.  Try using the
rawhide-kernel-nodebug repository to get non-debug kernels for Rawhide
and see if your problems persist:
http://fedoraproject.org/wiki/RawhideKernelNodebug

-T.C.
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