Bug#351171: xserver-xorg: fbCompositeSolidMask_nx8888x8888Cmmx() is hogging the CPU

[Michel Dänzer <daenzer@debian.org>]

On Fri, 2006-02-03 at 00:49 +0100, KELEMEN Peter wrote:
> Package: xserver-xorg
> Version: 6.9.0.dfsg.1-4
> Severity: normal
> 
> Start up an xterm with some FreeType fontface:
> 	uxterm -fa Monospace -fs 12
> 
> In the terminal, start spewing lot of output lines:
> 	find /
> 
> Observe the X server eating ~100% CPU.  Over a 2 minutes run, oprofile
> reveals the following:
> 
> samples  %        image name          app name       symbol name
> 550032   51.1805  libfb.so            Xorg           fbCompositeSolidMask_nx8888x8888Cmmx
> 289192   26.9093  libfb.so            Xorg           fbCompositeSrcAdd_8888x8888mmx

You seem to have set up fontconfig for subpixel anti-aliasing. Even
assuming your card could actually accelerate that, it's very non-trivial
and hasn't been implemented yet. You should get better results with
traditional greyscale AA.


-- 
Earthling Michel Dänzer      |     Debian (powerpc), X and DRI developer
Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer