[R] Multithreading

Liaw, Andy andy_liaw at merck.com
Tue Apr 16 14:00:17 CEST 2002

> From: Peter Dalgaard BSA [mailto:p.dalgaard at biostat.ku.dk]
> Lennart.Araskoug at astrazeneca.com writes:
> > Hi !
> > 
> > I wonder if the R application is capable of utilizing more 
> than one CPU. I
> > need to know since we run it on a SunFire 3800 with 8 750 
> USIII cpu:s and on
> > a E420R with 4 USII cpu:s and we don't feel like we get the 
> performance we
> > could expect.
> > 
> > I've seen some old discussions claiming that it isn't.
> It isn't ... yet. Duncan and Luke hope to get it going for 1.6.0.
> You can in principle link against a threaded ATLAS library (although
> there are known signal handling problems with that) and get multi-CPU
> numerics performance. And of course run multiple instances of R.

When I was fooling with ATLAS and MKL a while ago, I found that when I use
the threaded ATLAS, the elapsed time is actually longer than ATLAS w/o
threads.  MKL, OTOH, did provide the almost doubled speed expected on the
dual CPU box.  (Mandrake 7.1/R1.4.1/P3-866 Xeon).


Notice: This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (Whitehouse Station, New Jersey, USA) that may be confidential, proprietary copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named on this message. If you are not the intended recipient, and have received this message in error, please immediately return this by e-mail and then delete it.


r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list