radeon EXA performance questions
michel at tungstengraphics.com
Tue Jul 1 08:32:33 PDT 2008
On Tue, 2008-07-01 at 11:26 -0400, Ross Vandegrift wrote:
> I converted my workstation at the office to use EXA instead of XAA
> on a Radeon RV380. Many operations are clearly faster, and everything
> seems quite stable. I'm not using any compositing manager, just E17
> for normal 2D desktop work.
Which E17 rendering backend is enabled, does switching between them make
> No need for 3D, though it looks like Xorg enables AIGLX without a problem.
> I've come across some things that are enormously slower than XAA.
> For example, inserting a line into the middle of an emacs buffer or
> pressing the down arrow on a webpage. Scrolling by large amount is
> fast. Dragging a window shows the same effects. It seems to be
> moving a rectangle around the screen that's slow.
> Here's the device options I've enabled, and it's helped performance
> Driver "radeon"
> Option "AccelMethod" "EXA"
> Option "AccelDFS" "1"
> Option "EnablePageFlip" "1"
> Option "ColorTiling" "1"
> Option "FBTexPercent" "0"
Note that the Mesa r300 driver won't work correctly without any video
RAM reserved for textures.
> Option "MigrationHeuristic" "greedy"
Which version of the driver and xserver? With current versions this
option shouldn't be necessary in general.
Earthling Michel Dänzer | http://tungstengraphics.com
Libre software enthusiast | Debian, X and DRI developer
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