Re: NUMA or not on dual Opteron

Andi Kleen
2005-01-13T19:46:51Z

Raphael Jacquot <raphael.jacquot@imag.fr> writes:
>
> Numa needs to be enabled on bi-opteron systems because each processor
> controls part of the memory. unlike the intel memory architecture,
> where processors share the same bus to access memory.
> Numa in opteron systems is thus required to allow sharing of memory .

[just for the record to avoid wrong information in the archives]

No, that's wrong. Opteron is CC (cache coherent)/NUMA, like most
modern NUMA systems. CC/NUMA tends to be fully transparent, this
means the system can be run like a SMP. Just it's faster to be
NUMA aware.

-Andi