AMD: Experimental "ShadowPrimary" Acceleration

[ssvb]

OK, the new catalyst 12.6 configured as "aticonfig --set-pcs-u32=DDX,ShadowPrimary,1" indeed seems to perform better when trying to scroll http://www.phoronix.com in firefox using a mouse wheel. This was one of the worst nerve breaking experiences before, which even made me develop a habit dragging a scroll bar instead (during my previous short attempt using ati catalyst drivers). Maybe I should run some benchmarks to get the performance numbers

[Nasenbaer]

OK, the new catalyst 12.6 configured as "aticonfig --set-pcs-u32=DDX,ShadowPrimary,1" indeed seems to perform better when trying to scroll http://www.phoronix.com in firefox using a mouse wheel. This was one of the worst nerve breaking experiences before, which even made me develop a habit dragging a scroll bar instead (during my previous short attempt using ati catalyst drivers). Maybe I should run some benchmarks to get the performance numbers

A hint on improving the scolling experience in firefox: In the advanced tab in the firefox options dialog you can disable the "smooth scrolling" option. This doesn't look that nice but it stops the "chewing gum" experience when scrolling - hope you know what I mean.

[ssvb]

Nasenbaer: thanks for the hint! It's a band-aid, but probably can help to survive until opensource drivers get good OpenCL support.

[ssvb]

OK, the new catalyst 12.6 configured as "aticonfig --set-pcs-u32=DDX,ShadowPrimary,1" indeed seems to perform better when trying to scroll http://www.phoronix.com in firefox using a mouse wheel.

Unfortunately I have to take this back. After trying to actually use the new catalyst 12.6 drivers for real, the 2D performance still feels bad. Benchmarking with cairo traces shows that the performance has not really changed (since 12.2). Don't know, maybe I just failed to activate this "ShadowPrimary" thing properly...

[pandev92]

It run on legacy driver 12.6 beta but I can't see the improvements ehehe