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
