On Tue, 7 Feb 2006, Andi Kleen wrote:
> > The opterons are some strange mix of SMP and NUMA system. The NUMA "nodes"
> > are on the same motherboard
>
> Actually it's not true - 8 socket systems are built out of two
> boards. And there are much bigger systems upcomming.
But they are still next to one another.... No distance to cover,.
>
> > and therefore there are only small latencies
> > involved. NUMA only gives small benefits.
>
> That's also not true. Everytime I get memory placement for
> process memory wrong users complain _very_ loudly and there
> are clear benefits in benchmarks too.
What are the latencies in an 8 way opteron system? I.e. Local memory, next
processor, most distant processor?
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