On Fri, Dec 29, 2017 at 2:59 AM, Clemens Ladisch <clemens@email-addr-hidden> wrote:
> Paul Davis wrote:
> > AFAIK, NUMA is dead for everything except a few research systems.
> >
> > Parallel/multi-processor systems these days are all "symmetric" (all
> > processors have symmetrical access to all memory).
>
> While all processors have the ability to access all memory, the speed
> of these accesses is different when there are multiple memory
> controllers. So all multi-socket systems, and CPUs with multiple memory
> controllers on one die (Threadripper, some Xeons) are NUMA.
>
Are they NUMA in the "traditional" sense that there are local caches and a
complex cache invalidation scheme? Or just NUMA in the sense that "it's a
bit slower to get there from here"?
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Received on Fri Dec 29 20:15:02 2017
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