As 2.73 will be mainly a maintenance release, I would ask you to update the Toolkit on the Buildbots (Linux and Windows), so we can enable the sm_52 kernel. Further changes (like fatbin) can go to 2.74.
I would appreciate it Sergey and Martijn. :) Thanks, Thomas Am 23.11.2014 um 08:42 schrieb Thomas Dinges <[email protected]>: > Fixing SSS would of course be the best solution, but I think that is > more a long term project. > I think for now we should just build the extra sm_52 kernel. Although I > like your last suggestion as well (build fatbin and let users of sm5x > optimize themselves). > > Some further food for fought: > * We only support sm_20 and above (Geforce 400 series), which was > released in 2010. I think 4-8 GB RAM was pretty standard back then already. > * We could save some kernel compilation time for 32bit Blender, by > dropping CUDA support there. I don't think that GPU rendering + 32bit > environment is common. And again, we only have to look back to 2010. > 64bit CPUs + OS were common back then already. > > Am 20.11.2014 um 09:55 schrieb Sergey Sharybin: >> Technically it's easy. The only thing which is worrying is we'll have 12 >> kernels to be compiled now. >> >> Just to mention, fatbin is not gonna to help really. The thing here is ptx >> is really fast to compile, it's optimization to a specific arch takes loads >> of ram and time, So if we ship ptx with just ptx that'd mean users would >> need to have 8 gig to be able to get optimized code (which then being >> cached btw). it's not that nice at all. >> >> We can also look into making SSS more or less stable on GPU, or just >> declare GPUs not being feature-full. CMJ i don't think would give any >> issues btw. >> >> Another idea could be optimizing sm_20-sm_35 in the fatbin, users of sm_50, >> sm_52 would optimize on first render. They probably have enough ram for >> this :) A bit cruel i know, just throwing ideas for brainstorm of how to >> improve the situation. >> >> P.S. i don't mean we shouldn't switch to fatbin, that'd help making blender >> users to early users of new GPUs. >> >> On Thu, Nov 20, 2014 at 3:41 AM, Thomas Dinges <[email protected]> wrote: >> >>> Hey, >>> in order to support Geforce 9xx cards optimally, we should update the >>> CUDA Toolkit (Release & Buildbot) and compile native sm_52 kernels. >>> >>> Sergey, Martijn, can you please update the buildbots? >>> https://developer.nvidia.com/cuda-downloads-geforce-gtx9xx >>> This version is equal to the 6.5.14 we use atm, but adds support for >>> sm_52. So it should be a smooth and safe update. >>> >>> There is no version for Mac, but I think the 9xx cards are not available >>> yet for Mac anyway. >>> >>> Thanks, >>> Thomas >>> _______________________________________________ >>> Bf-committers mailing list >>> [email protected] >>> http://lists.blender.org/mailman/listinfo/bf-committers >>> >> >> > > _______________________________________________ > Bf-committers mailing list > [email protected] > http://lists.blender.org/mailman/listinfo/bf-committers _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
