On 5/21/06, Roland Scheidegger <[EMAIL PROTECTED]> wrote:
Pawel Salek wrote: > ColorTiling works like a charm: it gives factor two speedup in glxgears, > one can play RTCW at 1280x1024 *and* the random lines are gone! Is there > any reason this option is not the default? I am not sure, maybe it could be made the default by now? Historically, it is off by default because it didn't work on r3xx/r4xx cards (it was always on by default on older chips since it exists), because it wasn't fully implemented. I think it works without problems nowadays on all chips (dunno about the rs400 igps, though). I believe though it caused to lock up the r300/r350 chips even faster (with opengl apps) but that is probably more of a side effect. Someone more familiar with the r300 cards needs to answer that if it should be the default but it sure would be nice - the radeon chips are increasingly relying on this to get good performance (first generation (r1xx) radeon chips roughly gain 20% or so, 2nd generation (r2xx) more like 50%, and 3rd (r3xx/r4xx) 100%).
r3/4xx needs a drm update to make colortiling work with pageflipping for non-zero offsets sice they use a slightly different register setup. That's why it's been disabled. It's trivial, but no one has gotten around to doing it.
If the random lines disappear with color tiling that sounds like a bandwidth allocation problem, which should be fixed regardless (though it is feasible that it's simply impossible in non-tiled mode?).
The priority of the displays in the memory controller need to be tweaked for r3/4xx in some cases. setting the "displaypriority" option to "high" will bump the priority. I suppose we could unconditionaly bump the priority, I hadn't noticed any ill affects from leaving it bumped in my informal testing back when I was messing with it. It may only be needed when colortiling is disabled. Alex
Roland
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