Re: [Rd] cpu bound cases

From: Thomas Lumley <>
Date: Fri, 20 Feb 2009 04:10:24 -0800 (PST)

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
> cases.

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	University of Washington, Seattle

______________________________________________ mailing list Received on Fri 20 Feb 2009 - 11:12:32 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Fri 20 Feb 2009 - 15:30:31 GMT.

Mailing list information is available at Please read the posting guide before posting to the list.

list of date sections of archive