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Re: Octave and multicore processors

From: Thomas Weber
Subject: Re: Octave and multicore processors
Date: Thu, 26 Mar 2009 23:27:10 +0100
User-agent: Mutt/1.5.18 (2008-05-17)

On Thu, Mar 26, 2009 at 05:29:29AM -0700, Marcin Sleczka wrote:
> Jaroslav Hajek-2 wrote:
> > 
> > I'm curious: what makes you expect Octave should use two cores?
> > 
> I thought that Octave will try to do this calculation as fast as he can. So
> he should use all processors (cores), but he uses only one. Is this normal
> that if I've got Mac Pro with 2 processors and 8 cores Octave will use only
> one? My caculations will take an hour instead 10 minutes (7 cores are on
> holiday? :-) Can I force them to work?

Depends. Octave tries pretty hard to use optimized routines from
external libraries (eg ATLAS). So, if your libraries can use several
cores, so should Octave.


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