Hi. Nice work! It became very fast. It became faster than former revision for around 30 seconds. Rendering is done now in 1m30s. Thank you.
With best regards, PerfectionCat ----- Original Message ----- >From: Sergey Sharybin <[email protected]> >To: >Cc: bf-blender developers <[email protected]> >Date: 2016/8/4, Thu 01:21 >Subject: Re: [Bf-committers] Cycles CUDA Toolkit 8 transition > >Hi, > >There are now updated builds on the buildbot. Please give them a try. > >On Wed, Aug 3, 2016 at 4:58 PM, PerfectionCat <[email protected]> >wrote: > >> Hi. >> >> I tried SHA-1-70100b4ec7ba299912bf999f15914c0a29125ffd., but this revision >> is slow, too. >> With best regards, PerfectionCat. >> >> ----- Original Message ----- >> *From:* PerfectionCat <[email protected]> >> *To:* PerfectionCat <[email protected]>; Sergey Sharybin < >> [email protected]>; bf-blender developers <[email protected]>; >> bf-blender developers <[email protected]> >> *Date:* 2016/8/3, Wed 23:49 >> *Subject:* Re: [Bf-committers] Cycles CUDA Toolkit 8 transition >> >> I'm sorry. >> I got a wrong hash number. >> I have not yet tried SHA-1-70100b4ec7ba299912bf999f15914c0a29125ffd. >> With best regards, PerfectionCat. >> >> ----- Original Message ----- >> *From:* PerfectionCat <[email protected]> >> *To:* Sergey Sharybin <[email protected]>; bf-blender developers < >> [email protected]> >> *Date:* 2016/8/3, Wed 23:28 >> *Subject:* Re: [Bf-committers] Cycles CUDA Toolkit 8 transition >> >> Hi. >> >> I built in SHA-1: 6353ecb996898b4ce2fe8065130ed1f5ea3b6989 and tried it. >> The build did not become slow. >> However, blender which built in SHA-1: >> 70100b4ec7ba299912bf999f15914c0a29125ffd is slow. >> >> >> With best regards, PerfectionCat. >> >> >> ----- Original Message ----- >> >From: Sergey Sharybin <[email protected]> >> >To: PerfectionCat <[email protected]>; bf-blender developers < >> [email protected]> >> >Date: 2016/8/3, Wed 17:09 >> >Subject: Re: [Bf-committers] Cycles CUDA Toolkit 8 transition >> > >> > >> >Interesting. >> > >> > >> >Can you test revision 6353ecb and the one prior to it to see if it's this >> revision caused the problem? >> > >> > >> >On Wed, Aug 3, 2016 at 12:27 AM, PerfectionCat < >> [email protected]> wrote: >> > >> >Hi. >> >> >> >>blender which built using a source file at the time of 467e12514e60 in >> CUDA8 has a shorter time required for rendering of BMW for around 20 >> seconds. >> >> >> >>SHA-1-2f5db2e45b7a8af51b15c45bb41f5dcb49ae9d4d is slow. >> >>SHA-1-467e12514e60b4130cd0a33b59f53aa4cf7056b6 is fast. >> >> >> >>Windows 10 pro 64bits >> >> >> >>Intel i7 6700K 4.4GHz >> >>NVIDIA GTX 1070 >> >>MEMORY 16GB >> >> >> >> >> >>With best regards, PerfectionCat. >> >> >> >> >> >> >> >> >> >>----- Original Message ----- >> >>>From: Sergey Sharybin <[email protected]> >> >>>To: Blender Developers <[email protected]> >> >>>Date: 2016/8/2, Tue 23:44 >> >>>Subject: Re: [Bf-committers] Cycles CUDA Toolkit 8 transition >> >>> >> >>>Hey again, >> >>> >> >>>Spent majority of the day trying to solve the regression, without much >> >>>success. Even simplest kernel needed for BMW scene is about 10% slower. >> >>>This is mainly coming from bump nodes. Enabling all other features makes >> >>>things even worse performance wise. >> >>> >> >>>I did some tweaks again to make sure all functions are inlined in the >> same >> >>>manner by CUDA 8.0 as they used to be before. So now PTax output shows >> >>>exactly same function, but for some reason spills are just higher with >> new >> >>>toolkit and at the same time stack usage is reasonably slower. Not sure >> yet >> >>>what's going on here and think we'd better leave this alone for until >> >>>official toolkit is released. >> >>> >> >>>For the time being i've switched buildbots to use more complicated >> setup, >> >>>using CUDA 7.5 for all kernels except sm_60 and sm_61 (new generation >> >>>cards) and using new toolkit only for new kernels. >> >>> >> >>>So hopefully now all maxwell and lower crads have same performance as >> >>>before. And yet users of new cards can have some degree of GPU >> rendering. >> >>> >> >>> >> >>>On Mon, Aug 1, 2016 at 6:15 PM, Sergey Sharybin <[email protected]> >> >>>wrote: >> >>> >> >>>> Hey everyone, >> >>>> >> >>>> In order to make Cycles officially support new Pascal cards (GTX >> 10x0) it >> >>>> is crucial to use CUDA Toolkit 8. While it is still in the RC stage we >> >>>> started looking into making it official one for Cycles. >> >>>> >> >>>> There is already some initial work done: >> >>>> >> >>>> - Tweaks are done to Cycles kernel to have same level of inlined >> functions >> >>>> (new toolkit barely used inlined functions, which resulted in poor >> >>>> performance on all cards) >> >>>> - New toolkit was installed onto all release environments and >> buildbots. >> >>>> >> >>>> So on a positive side, next buildbot's builds will support Pascal >> cards, >> >>>> yay! :) >> >>>> >> >>>> But unfortunately, while i've managed to keep Kepler cards (GTX760) >> same >> >>>> performance as before, we had a report from Jens in IRC about Maxwell >> cards >> >>>> having a poor performance yet again (in his case, up to 40% worse). >> >>>> >> >>>> This is really unacceptable, we'll keep working on solution for this >> >>>> issue. It might take some time, so just be aware and please be >> patient :) >> >>>> >> >>>> I will keep posted here with our progress. >> >>>> >> >>>> -- >> >>>> With best regards, Sergey Sharybin >> >>>> >> >>> >> >>> >> >>> >> >>>-- >> >>>With best regards, Sergey Sharybin >> >> >> >>>_______________________________________________ >> >>>Bf-committers mailing list >> >>>[email protected] >> >>>https://lists.blender.org/mailman/listinfo/bf-committers >> >>> >> >>> >> >>> >> >>_______________________________________________ >> >>Bf-committers mailing list >> >>[email protected] >> >>https://lists.blender.org/mailman/listinfo/bf-committers >> >> >> > >> > >> > >> >-- >> > >> >With best regards, Sergey Sharybin >> > >> > >> _______________________________________________ >> Bf-committers mailing list >> [email protected] >> https://lists.blender.org/mailman/listinfo/bf-committers >> >> >> >> >> > > >-- >With best regards, Sergey Sharybin >_______________________________________________ >Bf-committers mailing list >[email protected] >https://lists.blender.org/mailman/listinfo/bf-committers > > > _______________________________________________ Bf-committers mailing list [email protected] https://lists.blender.org/mailman/listinfo/bf-committers
