Re: [PATCH] reduce inter-node balancing frequency

[Jesse Barnes]

On Thursday, July 15, 2004 9:48 pm, Nick Piggin wrote:
> Yeah, these numbers actually used to be a lot higher, but someone
> at Intel (I forget who it was right now) found them to be too high
> on even a 32 way SMT system. They could probably be raised a *little*
> bit in the generic code.

Ok, but I wouldn't want to hurt the performance of small machines at all.  If 
possible, I'd rather just add another level to the hierarchy if MAX_NUMNODES 
> some value.

> > We may have enough information to do that already... I'll look.
>
> The plan is to allow arch overridable SD_CPU/NODE_INIT macros for
> those architectures that just look like a regular SMT+SMP+NUMA, and
> have the generic code set them up.

Would simply creating a 'supernode' scheduling domain work with the existing 
scheduler?  My thought was that in the ia64 code we'd create them for every N 
regular nodes; its children would be the regular nodes with the existing 
defaults.

Thanks,
Jesse
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