[Bf-cycles] 3 way cuda performance comparison on sm_21 and sm_20 cards

Ton Roosendaal ton at blender.org
Fri Jun 14 18:52:43 CEST 2013


That's a very interesting and nice presented test, thanks!
I'll leave conclusions to the experts though :)


Ton Roosendaal  -  ton at blender.org   -   www.blender.org
Chairman Blender Foundation - Producer Blender Institute
Entrepotdok 57A  -  1018AD Amsterdam  -  The Netherlands

On 14 Jun, 2013, at 18:42, Jürgen Herrmann wrote:

> Hi,
> I did extensive tests on windows with different cuda toolkits and different builds (VS 2008, 2012 and MinGW) lately to see if I can find a reason why Cycles is so much slower on Windows/MSVC builds.
> My results can be reviewed here : http://download.shadowrom.de/Benchmark.pdf
> We could speed up CUDA performance on all OS if we use nvcc compiler optimization switches and some optimization in the cuda kernel code.
> I’ve also tried to profile cycles with “Very Sleepy” on Windows MSVC builds too. I am still experimenting on how to speed up the time critical parts for M$ compilers …
> /Jürgen
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