[Beowulf] AMD’s Direct Connect Architecture

Greg Lindahl lindahl at pathscale.com
Thu Jul 1 16:29:15 EDT 2004


On Thu, Jul 01, 2004 at 10:27:51AM -0500, Richard Walsh wrote:

> Yes, yes ....  I was trying to point out the potential  
> for confusion in looking just at the board and created by 
> the fact that SMP-like sharing of hardware is blurring as 
> designs share more or less of the components on a board, 

Richard,

SMP is SMP, and message passing is message passing. From a programming
model view, the two are very different.  So I don't think anything is
being blurred.

> Is a dual Opteron motherboard with a memory channel from
> each processor to its own memory and also hypertransport
> memory sharing a 2-way system or just 2 1-way systems
> on the same board?

It's a 2 cpu SMP system with a NUMA memory system.

-- greg

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