[Bf-cycles] Switch to CUDA Toolkit 4.2 (Test 2)

[Thomas Dinges]

Hi thanks for the first tests. :)

Well we have to keep in mind that Blender 2.63 and current Trunk differ 
a lot in terms of Cycles code (the new BVH code can be responsible for 
errors too).
I think I will compile trunk with 4.0 toolkit and 4.2 toolkit to do a 
better comparison and upload.

Best regards,
Thomas

Am 30.04.2012 20:39, schrieb David Black:
> *Test 2: (just the GTX 460)*
> Island_Cycles_BMesh_Second Updated
> 19 Billions of Polygons, not a ridiculous number anymore - Island
>
> *Official Blender 263*
> 1:00
>
> *Blender 263.1 CUDA 4.2.9 test version*
> 2:50
>
> Very slow with new CUDA Toolkit plus same graphical glitches as before 
> with certain trees.  Is it possible CUDA Toolkit 4.2.9 is not 
> backwards compatible, designed just for GTX 680 cards and above?  
> Guess we now need someone with a GTX 680 to test your build, been 
> wondering about getting one due to lower temps and power usage, but 
> still on the fence until know rendering works correctly.
>
> David
> -- 
>
> 3d-designs-davidblack.blogspot.com 
> <http://www.3d-designs-davidblack.blogspot.com>
>
>
> On 30/04/2012 18:32, David Black wrote:
>> Hey Thomas,
>>
>> Thank you for the download link.  Here are my findings so far...
>> Mike Pan BMW test scene:  Tried several times, re-rendering same 
>> scene plus closing and opening Blender to being rendering, no crashes 
>> on either GTX 460 or GTX 580M, render begins almost instantly thanks 
>> to Brecht's amazing optimized BVH building.
>>
>> Render times for CUDA Toolkit 4.2.9:
>>
>> *GTX 460
>> 1:03*
>>
>> *GTX 580M
>> 1:09*
>>
>> Can render almost a second faster if use the GTX 580M to run Blender 
>> interface but then interface becomes too sluggish during long GPU 
>> rendering, regrettably /(as you previously mentioned)/ using 
>> integrated Intel graphics to run Blender interface means no Viewport 
>> GPU rendering.  Why does Viewport GPU rendering work using a 9600 GT 
>> for display and a GTX 460 just for compute, it definitely uses the 
>> GTX 460 just for calculations?
>>
>> Anyway I digress!
>>
>> Only problem with 4.2.9 toolkit, there are errors rendering certain 
>> materials, render results are identical for both GTX 460 and GTX 580M 
>> .  Below are compare images to highlight the problem areas.
>> *
>> Official Blender 263*
>> http://www.pasteall.org/pic/31044
>>
>> *Blender 263.1 CUDA 4.2.9 test version*
>> http://www.pasteall.org/pic/31045
>>
>> Hope this is helpful,
>>
>> David
>> -- 
>>
>> 3d-designs-davidblack.blogspot.com 
>> <http://www.3d-designs-davidblack.blogspot.com>
>>
>>
>> On 30/04/2012 12:40, Thomas Dinges wrote:
>>> Hi David,
>>> thanks for offering help. :)
>>>
>>> Here is a current version of Trunk for win64, compiled with the 
>>> Toolkit 4.2 and kernels 13, 20, 21 and 30.
>>> http://blender.dingto.org/builds/trunk_win64_46104.7z
>>>
>>> Best regards,
>>> Thomas
>>>
>>> Am 29.04.2012 22:31, schrieb David Black:
>>>> Hi Thomas,
>>>>
>>>> Do you have a download link for your compiled version with 4.2.9?  
>>>> If helpful, can test it for you with both a 1GB GTX 460 and 2GB GTX 
>>>> 580m then let you know the results, if it crashes/freezes or not.
>>>>
>>>> Hope you're having a great weekend!
>>>>
>>>> David
>>>> -- 
>>>>
>>>> 3d-designs-davidblack.blogspot.com 
>>>> <http://www.3d-designs-davidblack.blogspot.com>
>>>>
>>>>
>>>> On 29/04/2012 17:29, Thomas Dinges wrote:
>>>>> Hi everyone,
>>>>> I did some extensive testing today with the new (stable release 4.2.9)
>>>>> CUDA Toolkit with Blender 2.63 (45996) and current Trunk.
>>>>>
>>>>> The results are fine (at least on my GT540 card), could not test other
>>>>> cards yet.
>>>>> Render time was the same, or in some cases a few seconds better.
>>>>>
>>>>> However I experienced 1 serious issue with the Mike Pan BMW Test scene.
>>>>> 2.63 compiled with Toolkit 4.2 did not want to render, it frooze at the
>>>>> "Packing BVH Triangles". I was unable to kill the Blender process, I had
>>>>> to force shut down my computer. This happened 2 times (I did not want to
>>>>> test it further).
>>>>> I think that this might be a bug in Cycles, because the same scene works
>>>>> fine in current Trunk (with the improved BVH code).
>>>>>
>>>>> So I would suggest to stick with Toolkit 4.0 for a possible Blender
>>>>> 2.63a, but switch to Toolkit 4.2 in SVN and for 2.64. I could not find
>>>>> an issue with it and current Trunk.
>>>>>
>>>>> Best regards,
>>>>> Thomas
>>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>> Bf-cycles at blender.org
>>>> http://lists.blender.org/mailman/listinfo/bf-cycles
>>>
>>>
>>> -- 
>>> Thomas Dinges
>>> Blender Developer, Artist and Musician
>>>
>>> www.dingto.org
>>>
>>>
>>> _______________________________________________
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>>> http://lists.blender.org/mailman/listinfo/bf-cycles
>>
>>
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-- 
Thomas Dinges
Blender Developer, Artist and Musician

www.dingto.org

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