Re: Processor sets (pset) for linux kernel 2.5/2.6?

[Martin J. Bligh]

> HT is accounted as a NUMA SMP system with strong memory affinity
> for his 2 cores, so that when running 2 HT processors (2+2 cores),
> the tasks are kept preferably on the same HT processor and just bounce
> cores, since they share the same cache (don't know exactly L1, L2 or
> both, tough).

We don't actually do that right now (though it was discussed) - we treat it 
as flat SMP. Ingo had some patches to share 1 runqueue between each HT pair, 
which I think is a better plan for this, but we're not seeing much 
performance improvment from it.

M.