Aha!!!  Well, that explains it pretty plainly!  Haha.  Thanks for letting me
know that.

I did think that the 25% max utilization on a four logical processor system
did seem a bit too "math friendly" explainable!

I'll try and find a "patched" version like you suggested.  It would be
interesting to see it run full-boar.

Thanks Slime!
Joe


"Slime" <fak### [at] emailaddress> wrote:
> > This is a dual Xeon (3.2ghz) system and I want to see what it can do!!
>
> POV-Ray doesn't make use of multiple processors. Sorry!
>
> Since you said 25%, I'm going to assume that those processors have
> hyperthreading. That means Windows essentially thinks you have four
> processors, and POV-Ray can only use one, so it says it's using 25%.
>
> In reality, it's a lot closer to 50% of the real processing power that you
> have. I have a single hyperthreading processor, and POV-Ray always says it's
> using 50%. This is equivalent to 100% of what a non-hyperthreading processor
> could do; it just pretends that a hypertheading processor can do twice the
> work. In reality, it can't, because if another thread comes along and tries
> to run, it's going to slow the first one down (because they're sharing the
> same processor). So the percentages are lying, in a sense. 50% for me means
> a lot closer to 100%, and 25% for you means a lot closer to 50%.
>
> You can't get higher than that though because POV-Ray runs in a single
> thread. I think there are patched versions, though, which make use of
> multiple threads, and you can get better performance...
>
>  - Slime
>  [ http://www.slimeland.com/ ]

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