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LLVMpipe Still Is Slow At Running OpenGL On The CPU
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But what if the CPU would do just a fraction of the work in a 'SLI' configuration and sync afterwards? Each time the sync function would compare the difference in time spend rendering and adjusts the load dynamically?
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Originally posted by Otus View PostThat's an oversimplification. CPUs have larger caches than GPUs, so they won't typically need as much memory bandwidth.
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Oh, and regarding dynamic load balancing... Couldn't that in principle be used to power down most of the GPU when not needed? Something like Optimus, but CPU+GPU instead of IGP+GPU.
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Originally posted by Qaridariumonly a 48core Opteron 6000 (155gb/s ramspeed)can beat a GPU (hd5870 160gb/s )
a normal PC do have 5-15gb/s compared to an hd5870 160gb/s its very slow.
this benchmark only show us this divergence
Personally, I would be fine with a software rasterizer, if that would drive my normal desktop use. It should also be much easier to get bugs out of it, since there isn't a multitude of incompatible hardware models to test it against.
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I think Monkeynut means dividing the rendering work between CPU (with LLVMPipe) and GPU (using regular drivers), like Crossfire or SLI but with one real and one "fake" GPU.
Quick answer is "yes in principle" but because of the overhead associated with splitting and recombining the rendering work it's usually only worth doing if the two renderers are fairly close in performance. In most cases the GPU would be a lot faster than the CPU renderer so the overhead of supporting multiple GPUs would probably match or outweigh the benefit from the additional performance.
That doesn't make LLVMpipe any less cool, though
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Originally posted by monkeynut View PostI wonder if it is possible to combine this renderer with the ATi/Nouveau renderers in a sort of SLI setup for a performance boost?
Or do you mean use LLVMpipe instead of Mesa softpipe to draw unsupported functions on older GPU's?
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I wonder if it is possible to combine this renderer with the ATi/Nouveau renderers in a sort of SLI setup for a performance boost?
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Yes Intel IGP is already done as part of next comparison. Mesa Software Rasterizer was thrown out though since it can't break 1FPS.
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what about including Intel IGP ?
Originally posted by jrch2k8 View Post... in any case compare it against an intel crappy igp
btw push 28 fps cpu only is quite an achievement
I personnally own a 9800 GT and will never think about using this software driver (and for any Nvidia/Ati solution); but on M/B with intel integrated video, for me, it make sense to compare it with any kind of intel dedicated drivers (open/closed source) or other software solution like Mesa.
Hope it will come with the next Mesa soft. vs LLVMpipe bench.
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Originally posted by FunkyRider View PostDynamic load balancing, we already have that, it's called SLI
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