R help - Oct 2010 - Intel i7 utilization

Hello,

Is there a way to force through R the amount of the cpu's cores (or the 
cpu's utilization level)  used under Windows 7 or Linux?

Thanks,
Costas

I guess you want a multi-threaded R. The cheapest way is to recompile 
R from the source and link it with an multi-threaded BLAS. See R-admin 
for details. See also Dirk's recent survey on this topic 
http://dirk.eddelbuettel.com/papers/gcbd.pdf I managed to do this under 
my linux box with Intel core 2 CPU which works well. But I haven't tried 
with i7 CPU.


Feng

On 10/05/2010 12:42 PM, Costas wrote:
>  Hello,
>
> Is there a way to force through R the amount of the cpu's cores (or 
> the cpu's utilization level)  used under Windows 7 or Linux?
>
> Thanks,
> Costas
>
-- 
Feng Li
Department of Statistics
Stockholm University
106 91 Stockholm, Sweden
http://feng.li/

Costas,

Take a look at this post that I found to be very helpful. The walkthrough is
very easy to follow.
http://psyccomputing.blogspot.com/2010/04/compiling-64-bit-r-2101-with-mkl-in.html

I'm not sure if the i7 is supported however you can always replace
export FFLAGS="-march=core2 -O3"
export CFLAGS="-march=core2 -O3"
export CXXFLAGS="-march=core2 -O3"
export FCFLAGS="-march=core2 -O3"

with. . 
export FFLAGS="-march=native -O3"
export CFLAGS="-march=native -O3"
export CXXFLAGS="-march=native -O3"
export FCFLAGS="-march=native -O3" 

Best,

Patrick

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Costas
Sent: Tuesday, October 05, 2010 6:42 AM
To: r-help at r-project.org
Subject: [R] Intel i7 utilization

  Hello,

Is there a way to force through R the amount of the cpu's cores (or the 
cpu's utilization level)  used under Windows 7 or Linux?

Thanks,
Costas

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