[Beowulf] Digital Image Processing via HPC/Cluster/Beowulf - Basics

Vincent Diepeveen diep at xs4all.nl
Wed Nov 7 10:15:21 PST 2012


What you mean to say Jim is that at many occasions most software is  
using O ( n ^ 2 ) for example
to sort polygons instead of doing it O ( n log n ) as things are more  
than fast enough, or they use
a real slow C++ way of inserting objects, which is easy to program  
yet of course loses you another factor 100
as it's real slow allocating and deallocating objects.

No problem for most scenes.

I did not put in money to remove a bunch of O ( n ^ 2 ) problems  
either in the 3d engine.

It's fast enough realtime!

Still it's faster there for the same high quality high polygon  
animations than the software that gets actually
used onto the cpu cores (without much of a SIMD optimization yet  
obviously).

Know what you speak about if you speak about graphics design...

Someone who knows something about 'algorithms' and knows how to spell  
that word - you can really speedup
things there.

Vincent

On Nov 7, 2012, at 4:08 PM, Lux, Jim (337C) wrote:

>
>>
>> Not quite.  Articles typically mention that the time to render a  
>> frame
>> of film has remainted pretty constant over the last decade, any speed
>> increases in the hardware being used to execute more complex
>> algorithms.  The move from 24fps to 48fps (ie The Hobbitt) isn't  
>> going
>> to help matters either.
>>
>
> I suspect that the "render time" requirement is driven by workflow,  
> rather
> than horsepower.  That is, it needs to be "fast enough", and they  
> either
> buy more hardware to make it faster or accept lower quality,  
> depending on
> their budget and cash position.
>
> Budgets probably are done (at the inception of the project) in  
> terms of "#
> of bodies working for # of months" and the manager gets to trade  
> dollars
> on hardware vs dollars on bodies, but the delivery date is essentially
> fixed.
>
> Like drag racing, it's "how fast can you afford to go"
>
>
>>
>
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