On Sun, 2008-12-14 at 16:08 -0800, Jeffrey Baker wrote: > On Sun, Dec 14, 2008 at 3:48 PM, Thomas Jaeger <thjae...@gmail.com> 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'm sure the glyph cache is a big help, but I don't think it's able to > explain the nonlinear performance difference between scrolling in > 80x24 (nearly adequate) and 80x48 (horrifying).
You've got 20% of your cpu being used from pixmap memory management in compositing, which would be gone with GEM+DRI2. You've got syncing happening in the 2D driver in glyph drawing, which is fixed in 2.6. And since you've got a server with no glyph cache, you're syncing per glyph even if you fix the driver. -- Eric Anholt e...@anholt.net eric.anh...@intel.com
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