[Bf-cycles] CUDA Toolkit 6.5 and Volume on GPU

[Thomas Dinges]

Hi Matt,
that is already fixed in the Master branch, unrelated to the new Toolkit 
and Volume. (Simple parameter mismatch after another commit). :)

Thomas

Am 23.08.2014 um 20:37 schrieb Matthew Heimlich:
> Hey Thomas,
>
> Just a heads up, in your build with volumes enabled, MIS doesn't work 
> for environment lighting on the GPU. Turning it on just results in a 
> black background.
>
>
> On Fri, Aug 22, 2014 at 3:46 PM, Martijn Berger 
> <martijn.berger at gmail.com <mailto:martijn.berger at gmail.com>> wrote:
>
>     Hi Thomas,
>
>     I think the move to cuda 6.5 and enabling volume are 2 issues and
>     should be treated as such. I do however agree that we should do both.
>     Ill update the buildbot to cuda 6.5. The cuda 6.5 cubins should
>     work on older drivers ( pre 331 ) but it would be good to also
>     test and verify.
>
>     Best regards,
>     Martijn
>
>
>     On Fri, Aug 22, 2014 at 5:16 PM, Thomas Dinges <blender at dingto.org
>     <mailto:blender at dingto.org>> wrote:
>
>         Hi David,
>         thanks for the tests!
>
>         * Equi-Angular and MIS is only implemented for Decoupled Ray
>         Marching, which we cannot enable on GPU yet due to Performance
>         / Stability issues. I will change the UI accordingly (for
>         example disable the button when GPU is used).
>
>         * The performance drop when using a texture is to be expected,
>         Decoupled Ray Marching helps here quite a bit, I guess that's
>         why CPU is faster in that case.
>
>         Best regards,
>         Thomas
>
>         Am 22.08.2014 um 15:57 schrieb David Fenner:
>>         On GTX titan, mike pan test:
>>
>>         2.71 official  27.62
>>         vainilla cuda 6.5          28.07
>>         volume cuda 6.5          28.25
>>
>>
>>         Notes: Was testing volumes and with a simple world volume and
>>         a lamp now it's actually much faster than cpu (before gpu was
>>         crazy slow). Haven't tested it with more complex scenes.  I
>>         noticed though that in gpu volume gets always sampled as
>>         "distance" sampling, no matter the setting. Cpu however
>>         respects the other settings (equiangular, etc). In distance
>>         gpu much faster and its also faster when bounces are
>>         introduced, something that in older builds really killed gpu
>>         performance.
>>
>>
>>
>>
>>
>>         2014-08-22 8:48 GMT-04:00 Tungerz <tungerz at gmail.com
>>         <mailto:tungerz at gmail.com>>:
>>
>>             Probably nothing,
>>             I was upgrading my Cuda Toolkit to 6.5 (From 6.0)
>>             My Norton antivirus picked up a virus from file
>>             nppc32_65.dll = Suspicious.Cloud.7.F
>>             Anyone else on windows had this?
>>
>>             Great results, looks like a small price to pay for gpu
>>             volume and scatter.
>>             Worth ever bit of it :)
>>
>>             Cheers,
>>              ~Tung
>>
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>>
>>
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