[Bf-cycles] AVX 2 bug?

[Thomas Dinges]

Some possibilities:

* Go back even further and see if it worked in early builds.

* Selectively disable some AVX2 codepaths in the code and try to narrow
it down.


Am 16.11.2016 um 13:06 schrieb Mohamed Sakr:
> Hi Sergey,
>
> the build that we use was pre all AVX 2 optimizations.
> https://developer.blender.org/rC6bec239678ffa16f9136501ebef8936297863b72
>
> cheers,
> Mohamed Sakr
>
> On Wed, Nov 16, 2016 at 1:46 PM, Sergey Sharybin <sergey.vfx at gmail.com
> <mailto:sergey.vfx at gmail.com>> wrote:
>
>     Hi,
>
>     There were some optimization for AVX2 done. So if it's some recent
>     issue you should be able to bisect it relatively easily.
>
>     On Wed, Nov 16, 2016 at 12:42 PM, Mohamed Sakr <3dsakr at gmail.com
>     <mailto:3dsakr at gmail.com>> wrote:
>
>         Hi,
>
>         got a weird bug when rendering with i7 5930k (didn't happen on
>         i7 3930k or CUDA).
>         http://pasteall.org/pic/index.php?id=108799
>         <http://pasteall.org/pic/index.php?id=108799>
>         http://pasteall.org/pic/index.php?id=108800
>         <http://pasteall.org/pic/index.php?id=108800>
>
>         our build is Oct 12 standalone build.
>         ideas?
>
>         cheers,
>         Mohamed Sakr
>
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>
>
>
>     -- 
>     With best regards, Sergey Sharybin
>
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>
>
>
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