[R] CPU Usage with R 2.1.0 in Windows (and with R 2.3.1)

[Uwe Ligges]

Markus Preisetanz wrote:
> ... 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?


You have either 2 CPUs, a dual core CPU or a P4/Xeon processor with 
hyperthreading enabled. In most regular cases, each R process runs with 
only one thread, i.e. on only one (virtual) processor.

Uwe Ligges


> 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
> 
> Client Vela GmbH Albert-Roßhaupter-Str. 32 81369 München fon: +49
> (89) 74217-113 main: +49 (89) 74217-150 fax: +49 (89) 74217-250 
> markus.preisetanz at clientvela.com
> <mailto:markus.preisetanz at clientvela.com> http://www.clientvela.com
> <http://www.clientvela.com/>
> 
> Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte
> Informationen. Wenn Sie nicht der richtige Adressat sind oder diese
> E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den
> Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie
> die unbefugte Weitergabe dieser E-Mail ist nicht gestattet.
> 
> This e-mail may contain confidential and/or privileged information.
> If you are not the intended recipient (or have received the e-mail in
> error) please notify the sender immediately and destroy this e-mail.
> Any unauthorized copying, disclosure or distribution of the material
> in this e-mail is strictly forbidden
> 
> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>  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: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Greene,
> Michael Sent: Tuesday, July 19, 2005 2:29 PM To:
> 'R-help at lists.R-project.org' 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]]
> 
> 
> 
> ------------------------------------------------------------------------
> 
> 
> ______________________________________________ 
> R-help at stat.math.ethz.ch mailing list 
> https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the
> posting guide http://www.R-project.org/posting-guide.html and provide
> commented, minimal, self-contained, reproducible code.