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Radeon Gallium3D Still Long Shot From Catalyst
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Buy lots of RAM and store the apitrace in a Snappy or LZ4-compressed ramdisk That should provide for a faster load time for the apitrace...
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Originally posted by mattst88 View PostRegrettably, this doesn't work. When you profile an apitrace replay, you find that a huge portion of the profile is simply apitrace parsing the multigigabyte trace file.
Just did a quick run with vdrift about 2min, 130MB trace. Frame rate without tracing is about 22fps, with tracing 17fps, retracing 15fps(68% of original fps). Are my results atypical?
As I see it, the slowdown would be the same for all benchmarked cards and we are interested in the relative performance only.
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I think it's very promising. The Xonontic benchmarks are very pleasing.
I am guessing from the benchmarks is that there is still some stuff falling back to software that is killing performance for certain things. With some optimization to applications and filling in some missing pieces in the drivers and we are golden. Once open source gets within about 70-80% of proprietary then I'd call it success.
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Originally posted by QaridariumLOL you always can buy a faster card but you can't buy a open catalyst
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Originally posted by log0 View PostBtw I think one could actually use api traces of games as benchmarks. This would additionally ensure that the same call paths are executed, no fall-backs or workarounds for specific hardware taken.
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Originally posted by pingufunkybeat View PostWith a more complex game at high resolution (Xonotic @1080p), the OSS drivers are at 60-65% of performance. This is a really good number. With HiZ and some shader compiler optimisation, it should reach 75%, which is really close to the best that can be reasonably expected from the open stack. At 75% performance, the OSS drivers becomes a real option for everyone
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I really don't understand why there are no doom3 benchmarks: xonotic and doom3 were the only two benchmarks I was interested to see.
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I don't see it so doomy and gloomy.
In trivial pixel-pushing benchmarks like OpenArena, Warsow and Padman, the OSS drivers are slower, but well within playable range. 500+ FPS is really not anything anyone cares about. 120Hz should be enough for anyone :P
With a more complex game at high resolution (Xonotic @1080p), the OSS drivers are at 60-65% of performance. This is a really good number. With HiZ and some shader compiler optimisation, it should reach 75%, which is really close to the best that can be reasonably expected from the open stack. At 75% performance, the OSS drivers becomes a real option for everyone other than people who need the absolute ultimate performance (scientific computing and elite gamerz). It's fast enough for the desktop and casual gaming, and the missing performance costs 20 bucks if you really need it. That would be wonderful! And don't forget that future generations (HD 7000) should be easier to optimise due to the switch away from VLIW.
It's interesting to see that Nexuiz is so much slower than Xonotic, as they are basically the same game... No idea what happened there. Also, more challenging benchmarks like doom3 would be nice.
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Yeah, catalyst sure does have a long way to go before it has the utility and openness of radeon-g3d.
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Debian has glx-alternative packages for allowing binary/open-source GPU drivers to coexist.
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