[R] 64-bit R on Intel Xeon EM64T running fine

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Oct 12 16:09:39 CEST 2004

On Tue, 12 Oct 2004, Roger D. Peng wrote:

> This is good news.  As far as I know R has built for quite some time 
> now on a number of 64 bit platforms (Linux on AMD Opteron/Athlon64, 
> Solaris/Sparc

and Alpha and Irix and HP-UX and AIX as far as I understand.

) but I can't recall seeing a build on Intel with the 64 
> bit extensions.  

As I understand it, this is an Intel `clone' of AMD64, so the only
news would be if there were any problems: in almost all cases the
executable code is identical to that compiled for AMD64 and in the GNU
classification it is also "x86_64-unknown-linux-gnu".

I would even expect a Goto BLAS to work, if not as well as on the specific 
Opteron it is tuned for.  (Fast BLASes are an essential part of making the 
most of 64-bit processors on large problems.)

> Michael Seewald wrote:
> > Dear mailing-list members,
> > 
> > In the days of cheap RAM and microarray applications feasting on memory,
> > 64-bit computers become more and more useful - to actually make use of memory
> > beyond the magic 4GB border. I would like to report the success of running
> > 64-bit R on an Intel Xeon EM64T machine under Linux. Just like on an AMD
> > Opteron, R v2.0.0 compiles fine (and out of the box) and is happily allocating
> > memory until RAM and swap reach their limit.
> > 
> > Hardware:
> > - HP xw6200 workstation
> > - dual Intel Xeon 3.4GHz with hyper-threading enabled
> > - 4GB RAM, 4GB swap
> > 
> > System: either
> > - Fedora Core 2 x86_64 bit Linux
> > or
> > - Red Hat Enterprise Linux Workstation 3.0 x86_64 bit
> > 
> > R:
> > - v2.0.0
> > 
> > Really, no problems at all during setup, a big thank you to the R developers
> > making this possible!

Brian D. Ripley,                  ripley at stats.ox.ac.uk
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, UK                Fax:  +44 1865 272595

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