On Mon, 7 Aug 2006, Singu wrote:
> You could compile R using specific libraries if threading/dual core is
> the issue
>
> Look eg here:
> http://tolstoy.newcastle.edu.au/R/devel/05/12/3355.html
Hmm, quoting me. None of those libraries for Windows is multithreaded,
nor does it say anthing about threads for Windows.
> and in R Administration Guide Section A.(2.2)
> .
> And probably you are better of with Linux if you rely on speed:
> http://www.r-project.org/useR-2006/Slides/IacusEtAl.pdf
>
> Stefan
>
> PS For Windows the precompiled Atlas Rblas.dll seems to be
> single-threaded. I use it on my P4 3Ghz HT Processor and CPU usage is at
> 50% as well.
Yes, as Windows does not have pthreads which is what ATLAS would use.
> Markus Preisetanz schrieb:
> > ... I have exactly the same issue with R 2.3.1 . The Question is: Why is R
> > unable to take more CPU space to make the calculation process go faster?
> >
> > In my case no hardisk nor any network device is involved (data in RAM, 600
> > of 1024 MB filled) - and the CPU usage of the rgui-process does not exceed
> > 50%.
> >
> > Has anybody an idea? Is there a setting a can change?
> >
> > Sincerely, Markus
> > ____________________________
> > Markus Preisetanz
> > Consultant
> >
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> > Albert-Roßhaupter-Str. 32
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> > From: Doran, Harold <HDoran_at_air.org
> > <mailto:HDoran_at_air.org?Subject=Re:%20%5BR%5D%20CPU%20Usage%20with%20R%202.1.0%20in%20Windows>
> > >
> > Date: Wed 20 Jul 2005 - 04:59:34 EST
> >
> >
> >
> > Dear Michael:
> >
> > Why is it a problem that R is not using more CPU space than it seems to
> > need?
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED] On Behalf Of Greene, Michael Sent: Tuesday, July
> > 19, 2005 2:29 PM
> > To: '[EMAIL PROTECTED]'
> > Subject: [R] CPU Usage with R 2.1.0 in Windows
> >
> > Hi,
> >
> > I'm using a fairly simple HP Compaq desktop PC running Windows 2K. When
> > running a large process in R, the process "RGUI.exe" will never exceed 50%
> > of the CPU usage.
> >
> > The program used to be able to use more of the computer, but does not now.
> > I don't believe this is a multiple processor machine.
> >
> > Can anyone give any advice on how to solve the problem?
> >
> > Thanks,
> >
> > Michael Greene
> >
> > Product Management
> > Plymouth Rock Assurance Corp
> > 617-951-1682
> >
> >
> > [[alternative HTML version deleted]]
> >
> >
> > ------------------------------------------------------------------------
> >
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> > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
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--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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