On 12/17/2014 05:44 PM, Armin K. wrote: > On 12/05/2014 01:38 AM, Armin K. wrote: >> On 05.12.2014 01:06, Ken Moffat wrote: >>> On Fri, Dec 05, 2014 at 12:30:20AM +0100, Armin K. wrote: >>>> On 05.12.2014 00:08, Ken Moffat wrote: >>>>> >>>>> 1.4 The modesetting driver >>>>> >>>>> This requires CONFIG_FB and CONFIG_DRM_BOCHS. Using >>>>> CONFIG_DRM_CIRRUS_QEMU is recommended, although it appears to work >>>>> (with lower fps in glxgears, so higher cpu usage) without that. >>>>> >>>> >>>> It's a generic driver and in theory it should work with any hardware >>>> that has a KMS driver. It has also been merged into Xserver-1.17, much >>>> like Glamor was to 1.16 so I propose that you postpone the addition >>>> (just to avoid the unnecessary work). >>>> >>> >>> Thanks for that. I was aware that it should work with any hardware >>> that has a kms driver, but for x86 in practice I think that limits >>> it to qemu - I assume chip-specific drivers will always be >>> preferred, so intel, nouveau, radeon are unlikely to use it? >> >> I believe they can use it, but you'd get bad performance compared to the >> hardware specific (and optimized) DDX-es. It's also a base for new >> hardware specific DDX drivers that have a KMS driver. Another thing that >> I am not 100% sure of is that the driver that was mergeed into xserver >> tree is hooked up to glamor, so it may use OpenGL to accelerate 2D >> graphics where supported. >> > > Now I have stumbled upon something very interesting. It seems that > modesetting driver was performing better than the ati driver according > to the openbenchmarking benchmark done by someone. > > http://openbenchmarking.org/result/1412165-LI-1412162LI31 > > Given that it uses glamor for 2D acceleration over 3D driver where > supported, it's not a big surprise. >
Small correction - given that they *both* use Glamor (as the card that's being benchmarked is the one driven by radeonsi and such hardware doesn't have EXA, only Glamor acceleration). -- Note: My last name is not Krejzi.
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