CVS Update: xc (branch: trunk)

[Benjamin Herrenschmidt]

On Sat, 2005-10-08 at 19:03 -0700, Eric Anholt wrote:
> CVSROOT:	/cvs/xorg
> Module name:	xc
> Changes by:	anholt at gabe.freedesktop.org	05/10/08 19:03:23
> 
> Log message:
>   Don't try the accelerated glyphs path for component-alpha text (which
>   I don't expect drivers to be able to accelerate without exa assistance).
>   Instead, drop back to plain old miGlyphs for a 62.5% +/- 1.5% reduction
>   in runtime of my ls -lR test (n=5) with component alpha.  While a
>   reasonable approach would seem to be making a better test to see whether
>   the entire path would be accelerated and force migration appropriately,
>   my attempt at this made the situation much worse.

What about having the driver expose a set of flags for triggering such
behaviour ? The driver knows what it can do or can't (and might even do
some kind of quick bench at startup) and set "hints" flags that can then
influence EXA policy.