[Rd] cpu bound cases
tlumley at u.washington.edu
Fri Feb 20 13:10:24 CET 2009
On Thu, 19 Feb 2009, Rubin, Norman wrote:
> I'm considering some things AMD could do to accelerate R using GPU
> processors. In an internal discussion I was asked
> "Are there interesting R computations which are currently cpu bound?"
> I'm sure there are lots but I'd like to be able to name some real world
It depends a bit on what you mean by cpu-bound. Some of the arithmetic and mathematical functions are fairly clearly cpu bound, since Luke Tierney's multithreaded math library speeds them up.
The matrix operations in regression can easily push the CPU usage to 100%, but the success of ATLAS suggests that they may really be limited more by cpu memory bandwidth. I don't know if this counts.
Other people may have different suggestions.
Thomas Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle
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