[Bf-committers] Blender and OpenMosix... does it have any sense ?

[Ton Roosendaal]

Hi,

> On a slightly different subject...
> I've been playing around with the multithreaded renderer, and I can't  
> seem to get it to exceed 78% overall CPU usage on my dual Opteron.

This will really depend on the scene you render I think... try for  
example one using a lot AO, and without particles or halos (that latter  
isn't threaded yet).
On my dual G5, I get usually a speedup of almost 200% on complex scenes.

> It looks like the renderer is in need of optimization -- it looks like  
> he was really conservative and careful in making sure that there  
> wouldn't be lots of annoying concurrency issues.

I've removed quite some old optimizings from the past. Optimizing  
always is dangerous you know... first need to be sure it works for  
100%! :)
But yes, especially subpixel render code can be much faster again.

-Ton-

>  I just got through with a hardcore OS course on concurrency and would  
> love to look at it, but I'm swamped right now and really can't.
>
> Matt
>
>
>
> malefico andauer wrote:
>
>> Hi People,
>>
>> I was doing a few tests with Open Mosix, and after
>> reading some papers, I realized that for Blender being
>> able to use such clustering system, it has to be
>> written/coded in a way that rendering can be splitted
>> in different processes (this will sound incredible
>> obvious for most of you, but you know...)
>>
>> I wonder if are there any plans or ideas to adapt
>> blender so rendering could be turned into
>> multiprocessing, so we can set up a renderfarm using
>> Open Mosix ? Does this have any sense or current
>> network rendering tools are already working OK so
>> there is no need of Open Mosix whatsoever ?
>>
>> Regards.
>>
>> malefico.
>>
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Ton Roosendaal  Blender Foundation ton at blender.org  
http://www.blender.org