subject:"\[R\] CPU Usage with R 2.1.0 in Windows \(and with R 2.3.1\)"

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

2006-08-07 Thread Markus Preisetanz

... 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

Client Vela GmbH
Albert-Roßhaupter-Str. 32
81369 München
fon: +49 (89) 74217-113
main: +49 (89) 74217-150
fax: +49 (89) 74217-250
[EMAIL PROTECTED]  
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.
 
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not the intended recipient (or have received the e-mail in error) please notify 
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xx
From: Doran, Harold 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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Re: [R] CPU Usage with R 2.1.0 in Windows (and with R 2.3.1)

2006-08-07 Thread Duncan Murdoch

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?
>  
> 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?
>   
You are probably on a dual core or hyperthreaded machine.  R does almost 
all of its work in one thread, so it will max out the usage on one cpu, 
but not more than one.

If you are on a hyperthreaded machine, you can disable hyperthreading 
and the report should show 100% usage, but that doesn't mean things will 
be going twice as fast.  (I have heard that hyperthreading does slow 
down some computations, so turning it off might be a good idea, but I 
have never done the measurements myself.)

Duncan Murdoch
>  
> 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
> [EMAIL PROTECTED]  
> 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
>  
> xx
> From: Doran, Harold  
>  > 
> 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]]
>
>   
> 
>
> __
> R-help@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.
>

__
R-help@stat.math.ethz.ch mailing list
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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.

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

2006-08-07 Thread Uwe Ligges



Duncan Murdoch wrote:
> 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?
>>  
>> 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?
>>   
> You are probably on a dual core or hyperthreaded machine.  R does almost 
> all of its work in one thread, so it will max out the usage on one cpu, 
> but not more than one.
> 
> If you are on a hyperthreaded machine, you can disable hyperthreading 
> and the report should show 100% usage, but that doesn't mean things will 
> be going twice as fast.  (I have heard that hyperthreading does slow 
> down some computations, so turning it off might be a good idea, but I 
> have never done the measurements myself.)

Highly depends on the task. I have seen two WinBUGS processes on a 
hyperthreading machine making full use of hyperthreading and surpisingly 
completing *both* in the same time as one on the same machine with 
hyperthreading disabled. I don't think Intel folks will find many of 
such impressive examples ...

Uwe Ligges



> 
> Duncan Murdoch
>>  
>> 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
>> [EMAIL PROTECTED]  
>> 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
>>  
>> xx
>> From: Doran, Harold > 
>>  > 
>> 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]]
>>
>>   
>> 
>>
>> __
>> R-help@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.
>>
> 
> __
> R-help@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.

__
R-help@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.

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

2006-08-07 Thread 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 
> [EMAIL PROTECTED]
>  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
> 
> xx
>  From: Doran, Harold  
> > 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]]
> 
> 
> 
> 
> 
> 
> __ 
> R-help@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.

__
R-help@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.

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

2006-08-07 Thread Mike Saunders

Markus:

My guess is that you have either a dual-core or a hyperthreaded processor. 
Hyperthreading caps the CPU usage for any process at 50%.  It can be shut 
off by going through the BIOS setup for your machine.  For the dual-core, I 
am not sure if you can configure the BIOS to use both processors for one 
particular task (I don't have a dual core).

Mike

Mike R. Saunders
Forest Biometrician
Cooperative Forest Research Unit
University of Maine
5755 Nutting Hall
Orono, ME  04469-5755

207-581-2763 (O)
207-581-2833 (F)

- Original Message - 
From: "Markus Preisetanz" <[EMAIL PROTECTED]>
To: 
Sent: Monday, August 07, 2006 8:31 AM
Subject: Re: [R] CPU Usage with R 2.1.0 in Windows (and with R 2.3.1)


... 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

Client Vela GmbH
Albert-Roßhaupter-Str. 32
81369 München
fon: +49 (89) 74217-113
main: +49 (89) 74217-150
fax: +49 (89) 74217-250
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
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

xx
From: Doran, Harold 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]]







> __
> R-help@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.
>

__
R-help@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.

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

2006-08-07 Thread Mike Saunders

I have done the measurements, at least with some of the code I have built 
for spatial pattern analysis.  If you are on a networked machine, with lots 
of network processes running in the background, turning off hyperthreading 
increases speed by 30-50% (at least on my network).  I have tried it on a 
non-networked machine, and speed increased by 60% or better.

Mike

Mike R. Saunders
Forest Biometrician
Cooperative Forest Research Unit
University of Maine
5755 Nutting Hall
Orono, ME  04469-5755

207-581-2763 (O)
207-581-2833 (F)

- Original Message - 
From: "Duncan Murdoch" <[EMAIL PROTECTED]>
To: "Markus Preisetanz" <[EMAIL PROTECTED]>
Cc: 
Sent: Monday, August 07, 2006 8:42 AM
Subject: Re: [R] CPU Usage with R 2.1.0 in Windows (and with R 2.3.1)


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?
>
> 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?
>
You are probably on a dual core or hyperthreaded machine.  R does almost
all of its work in one thread, so it will max out the usage on one cpu,
but not more than one.

If you are on a hyperthreaded machine, you can disable hyperthreading
and the report should show 100% usage, but that doesn't mean things will
be going twice as fast.  (I have heard that hyperthreading does slow
down some computations, so turning it off might be a good idea, but I
have never done the measurements myself.)

Duncan Murdoch
>
> 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
> [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
> 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
>
> xx
> From: Doran, Harold  <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]]
>
>
> 
>
> __
> R-help@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.
>

__
R-help@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.

__
R-help@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.

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

2006-08-07 Thread Singu

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
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.


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
>
> Client Vela GmbH
> Albert-Roßhaupter-Str. 32
> 81369 München
> fon: +49 (89) 74217-113
> main: +49 (89) 74217-150
> fax: +49 (89) 74217-250
> [EMAIL PROTECTED]  
> 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
>  
> xx
> From: Doran, Harold  
>  > 
> 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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>

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

2006-08-07 Thread Prof Brian Ripley

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
> >
> > Client Vela GmbH
> > Albert-Roßhaupter-Str. 32
> > 81369 München
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> > main: +49 (89) 74217-150
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> > Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte 
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> >  
> > xx
> > From: Doran, Harold  > 
> >  > 
> > 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]]
> >
> >   
> > 
> >
> > __
> > R-help@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.
> >
> 
> __
> R-help@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.
> 

-- 
Brian D. Ripley,  [EMAIL PROTECTED]
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel:  +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UKFax:  +44 1865 272595__
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Re: [R] CPU Usage with R 2.1.0 in Windows (and with R 2.3.1)

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

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

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

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

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

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

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

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