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

[Liaw, Andy]

This article might be of interest to some:
http://www.linux-mag.com/2004-07/athlon_01.html

Regarding 64-bit build of R, I can confirm Irix, Alpha and AIX, although
some w/o readline/jpeg/png/X support, partially because of difficulties
linking against 64-bit version of those libraries.

Best,
Andy

> From: Prof Brian Ripley
> 
> 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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