On Fri, Sep 26, 2008 at 09:00:59AM +0100, Peter Robinson wrote:
> All multi-processor x86_64 machines are NUMA. I'm unclear
how this
> applies to multi-core (in one chip) though. Do the cores have
> independent DDR controllers?
I thought numa is a series of computers connected together via a fast
interconnect such as Infiband where they can access each others memory
but accessing local memory is faster than non-local memory. Hence Non
Uniform Memory Access.
http://en.wikipedia.org/wiki/Non-Uniform_Memory_Access
That article could use some updating. Modern multi-cpu systems basically use
that same model internal to the system.
--
Matthew Miller <mattdm(a)mattdm.org>
Senior Systems Architect
Cyberinfrastructure Labs
Computing & Information Technology
Harvard School of Engineering & Applied Sciences