very bad, and very weird, scrolling text performance xorg 1.5.3 intel 2.5.1 GM965

[Lukas Hejtmanek]

On Sun, Dec 14, 2008 at 06:48:52PM -0500, Thomas Jaeger wrote:
> You really need the glyph cache in the X server to get decent text
> performance out of the 2.5 intel driver.  The patches are pretty
> straightforward to backport, but it is my understanding that a 1.6
> server will be uploaded to jaunty soon, so you might want to wait for that.

I wonder whether the Intel driver can get at least close to Nvidia driver.

I ran x11perf on Nvidia system and Xserver *without* the glyph cache. Compared
to these numbers, the Intel driver seems to be a bit comic with 56k glyphs/sec
with EXA or 215k glyphs/sec with UXA.

x11perf -aa10text 

Sync time adjustment is 0.0603 msecs.

40000000 reps @   0.0001 msec (6990000.0/sec): Char in 80-char aa line (Charter 10)
40000000 reps @   0.0001 msec (7000000.0/sec): Char in 80-char aa line (Charter 10)
40000000 reps @   0.0001 msec (6940000.0/sec): Char in 80-char aa line (Charter 10)
40000000 reps @   0.0001 msec (7000000.0/sec): Char in 80-char aa line (Charter 10)
40000000 reps @   0.0001 msec (6990000.0/sec): Char in 80-char aa line (Charter 10)
200000000 trep @   0.0001 msec (6990000.0/sec): Char in 80-char aa line (Charter 10)

-- 
Lukáš Hejtmánek