xserver-xorg-video-radeon 6.14.4: X has constant 10 % CPU usage

[Michel Dänzer]

On Die, 2012-09-11 at 15:07 +0200, Paul Menzel wrote: 
> Am Dienstag, den 11.09.2012, 14:55 +0200 schrieb Michel Dänzer:
> > On Die, 2012-09-11 at 14:42 +0200, Paul Menzel wrote: 
> > > 
> > > using Debian Sid/unstable with the awesome 3.4.13-1 window manager and
> > > Evolution 3.4.3-1, htop shows X to constantly use 10 % of the CPU.
> > > Closing Evolution the usage goes back to more or less 0 %.
> > 
> > I'm not seeing this. Is there something in your Evolution window(s) that
> > is constantly repainting, e.g. a spinner in the status bar, a blinking
> > cursor, ... ?
> 
> Now that you are mentioning it, in the bottom there is the message
> »Checking for New Messages« and next to it there is an animation where
> something goes around a circle. Canceling that removes X’s CPU usage.

That's a GTK+ spinner widget, which uses RENDER trapezoids, which is a
software rendering fallback with EXA.

> Should I recommend something to the Evolution folks on how to due such
> animations? Or is the only way to avoid animations?

I don't think there's anything wrong with the animation per se. However,
one issue I've found is that Evolution schedules many actions as glib
idle callbacks with priority lower than G_PRIORITY_HIGH_IDLE + 20, which
is the priority used by GTK+ for drawing animations. This can result in
the animations delaying the completion of the actual work they're
representing.


-- 
Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer
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