It depends on the computations you want to do.
R for Mac OS X uses Altivec which is a multithreaded version of BLAS
and lapack. What this means is that for any computations involving
matrix algebra, you do utilize multiple cores. Depending on what you
are trying to compute and how that computation is implemented, this
may prove to be just what you want or it may have little to no effect.
Kasper
On Nov 25, 2008, at 15:24 , John C. Tull wrote:
Dear R-mac Users:
I'm wanting to leverage an 8-core Intel Mac Pro for all of its
computational glory. Looking over the mail list, it appears that the
conversation on 64-bit builds of R has been about gaining access to
memory beyond the 32-bit limit of 3.5 GB and not about multiple
processors/cores.
Does running 64-bit R only take advantage of one processor core at a
time like the standard 32-bit R, or does it do symmetric
multiprocessing (is this the right terminology?). If no, is there
any possibility of doing this using X-grid or otherwise that someone
can detail? I do have 10.5 Server if I have to go down that road.
Thanks,
John
--
John C. Tull, Ph.D.
Conservation Director
Nevada Wilderness Project
8550 White Fir Street
Reno, NV 89523 USA
775.746.7851 (office)
775.224.2947 (mobile)
www.wildnevada.org
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