[Bf-committers] Cycles, Optimize Linux Build?

[Sergey Sharybin]

Hi,

I'm not sure if it's indeed the issue, but heard about slowdown when cuda
toolkit 4.1 is used. Build environment is using toolkit 4.0.

Release build environment is using almost the same configs as buildbot
does. You can check them there
https://svn.blender.org/svnroot/bf-blender/trunk/blender/build_files/buildbot/config/

Hope this info will help you :)

On Thu, Feb 9, 2012 at 7:10 PM, Carsten Wartmann <cw at blenderbuch.de> wrote:

> Hi,
>
> since some time (can't nail it down exactly) I found that my own trunk
> builds are much slower for Cycles on GPU than builds from graphicall.org
> or the official builds.
>
> I am working on (X)Ubuntu 10.04 64bit. Here are some numbers:
>
> Hardware: Geforce GTX 460SC, Intel QuadCore Q9450 at 2.66GHz, 4GB Ram
>
> Compiler Flags: -O3 -ffast-math -msse2 -mtune=core2
>
> Scene: Mike Pan's BMW Benchmark for Cycles
> http://mikepan.com/files/BMW1M-MikePan.blend
>
> 2.62rc1:
> ---------
> CPU: 6:54
> GPU: 1:15
>
> own build:
> ----------------
> CPU: 5:48 (Yay!)
> GPU: 5:09 (CPU Meter shows that it really renders with GPU)
>
> So why is Cycles in my own build on the GPU so much slower? Where are
> the buttons to tune it? What I am doing wrong?
>
> EDIT: I did an experiment to copy the cycles/ folder in the addons to my
> build and then I get the same numbers as the rc1... So I need to ask:
> How do I compile this as fast as in the RC1?
>
> Thanks,
> Carsten
> --
> Carsten Wartmann: Autor - Dozent - 3D - Grafik
> Homepage:         http://blenderbuch.de/
> Das Blender-Buch: http://blenderbuch.de/redirect.html
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-- 
With best regards, Sergey Sharybin