True, but shader optimizations should have little to no effect here. It's a very simple triangle, completely memory-bound. It's as if tiling was not enabled for Cayman, which could explain that ~50% discrepancy.
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13-Way R600/RadeonSI GPU Comparison With Mesa 10.1 On Ubuntu 14.04
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With kernel 3.13, dpm is not enabled by default so CIK parts are running at their boot up clocks which are like a 100Mhz. 3.14 enables dpm by default on those asics. Additionally, tiling is not yet enabled by default on CIK parts. That should be enabled in the next ddx release.
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Originally posted by agd5f View PostWith kernel 3.13, dpm is not enabled by default so CIK parts are running at their boot up clocks which are like a 100Mhz. 3.14 enables dpm by default on those asics. Additionally, tiling is not yet enabled by default on CIK parts. That should be enabled in the next ddx release.
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@Michael
Could you please test Ubuntu 13.10 with oibaf's PPA + this PPA: https://launchpad.net/~nzatkovich/+a...eediergraphics + latest linux 3.14 RC, + performance CPU governor, + radeon.dpm=1 for all the cards?
It would be interesting to have a look at the current state of the drivers, and to compare them to fglrx under the same conditions (to see if CPU governor really is a factor, and to know if the FOSS driver is at the same performance level under this conditions)
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Originally posted by asdfblah View Post@Michael
Could you please test Ubuntu 13.10 with oibaf's PPA + this PPA: https://launchpad.net/~nzatkovich/+a...eediergraphics + latest linux 3.14 RC, + performance CPU governor, + radeon.dpm=1 for all the cards?
It would be interesting to have a look at the current state of the drivers, and to compare them to fglrx under the same conditions (to see if CPU governor really is a factor, and to know if the FOSS driver is at the same performance level under this conditions)
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