[Intel-gfx] Low performance for trapezoid-heavy stuff

[Clemens Eisserer]

Hi,

Using the stuff deployed with fedora rawhide (2.6.29.1 + 2.7.0 on
xorg-1.6.1) I experience very low performance for trapezoid heavy
apps.

E.g. Firefox renders this svg in about 50ms on XAA, whereas it takes
about ~400ms with UXA:
http://upload.wikimedia.org/wikipedia/commons/6/63/Periodic_table_%28german%29_4.svg

Also QGears2 (a qt benchmark) only reports 7fps instead of 80 when
running on EXA.

Oprofile reports all time is spent in rasterize_edges, could that be
related with the recent change of the cache-mode?

Thanks, Clemens