[Beowulf] Register article on Epyc

[Mark Hahn]

> But now, with 20+ core CPUs, does it still really make sense to have
> dual socket systems everywhere, with NUMA effects all over the place
> that typical users are blissfully unaware of?

I claim single-socket systems already have NUMA effects, since multiple
layers (differently-shared) of cache have the same effect as memory at 
different hop-distances.

regards, mark hahn.