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

[David Fenner]

both proposals seem more than welcome!


2014-08-21 17:54 GMT-04:00 Thomas Dinges <blender at dingto.org>:

> Hi everyone,
> NVIDIA just released the CUDA Toolkit 6.5:
> https://developer.nvidia.com/cuda-toolkit
>
> I recommend an update for 2 reasons:
> 1) It improves rendering performance.
> 2) It now supports Visual Studio 2013, so no other VS or SDK
> installations are needed anymore on Windows.
>
> I ran some benchmarks on Windows 7 x64, with a Geforce 540M (sm_21),
> master 2e5e1e2.
> - cornell_box.blend (256x256 Tiles, 100 Samples)
> - bmw.blend (128x128 Tiles, 100 Samples)
>
> 1) Master (Vanilla) with Toolkit 6.0
> - cornell: 57.47s
> - bmw: 1:53.63min
>
> 2) Master (Vanilla) with Toolkit 6.5
> - cornell: 54.10s
> - bmw: 1:50.10min
>
> 3) Master (with __VOLUME__) with Toolkit 6.5
> - cornell: 56.15s
> - bmw: 1:52.51min
>
> 4) Master (with __VOLUME__ and __VOLUME_SCATTER__) with Toolkit 6.5
> - cornell: 56.99s
> - bmw: 1:54.37min
>
> I think we have 2 choices after the CUDA Toolkit upgrade:
> 1) Keep feature set as is, benefit from better performance
> 2) Enable Volume (and Volume Scatter) on GPU, performance stays roughly
> the same
>
> Best regards,
> Thomas
>
>
>
>
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