[Intel-gfx] UXA fallbacks - what can be improved there?

[Arkadiusz Miskiewicz]

Hello,

I'm trying to switch from radeon driver to intel one on a t400 notebook and I 
have one annoying performance issue.

Switching between kde4 konsole tabs is too slow. I'm looking for a hints or 
solutions that could improve this. Any ideas?

I'm using 2.6.29, drm from drm-next branch, intel driver from master, xserver 
1.6, UXA enabled, dri enabled.

Switching from first tab to the second one and back gives me these fallbacks:

# cat log | sort | uniq -c
   4683 (II) intel(0): EXA fallback: Component alpha not supported with source 
alpha and source value blending.
      7 UXA fallback at uxa_check_poly_fill_rect: to 0x5404600 (s)
     18 UXA fallback at uxa_check_poly_fill_rect: to 0x55973f0 (s)
     19 UXA fallback at uxa_check_poly_fill_rect: to 0x561e9c0 (s)
     15 UXA fallback at uxa_check_poly_fill_rect: to 0x561f810 (s)
      8 UXA fallback at uxa_check_poly_fill_rect: to 0x594b0b0 (s)
      1 UXA fallback at uxa_check_poly_fill_rect: to 0x5a312b0 (s)
      1 UXA fallback at uxa_check_poly_fill_rect: to 0x5aabd90 (s)
      4 UXA fallback at uxa_get_image: from 0x4b9f790 (s)
      4 UXA fallback at uxa_get_image: from 0x5404600 (s)

"Component alpha not supported with source alpha and source value blending." 
is showing all the time, even when not switching so probably this is not the 
issue here.

Can uxa_check_poly_fill_rect be improved/accelerated?

I'm using redhat liberation mono font on kde4 konsole if that matters.
-- 
Arkadiusz Miśkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/