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Re: [Xen-devel] [PATCH 1 of 3] libxl: take node distances into account during NUMA placement

On 19/10/12 00:20, Dario Faggioli wrote:
On Thu, 2012-10-18 at 16:17 +0100, George Dunlap wrote:
On Tue, Oct 16, 2012 at 6:26 PM, Dario Faggioli
<dario.faggioli@xxxxxxxxxx> wrote:
In fact, among placement candidates with the same number of nodes, the
closer the various nodes are to each others, the better the performances
for a domain placed there.
Looks good overall -- my only worry is the N^2 nature of the
algorithm.  We're already doing some big combinatorial thing to
generate the candidates, right?

It is, with N being the number of nodes, which we discussed thoroughly
already a couple of months ago, and reached consensus on the fact that N
will stay less than 8 for the next 5 (but probably even more) years. :-)

In any case, if something really unexpected happens, and N jumps to
anything bigger than 16, the placement algorithm won't even start, and
we'll never reach this point!.

Ah, right -- Yes, I think the "safety valve" was the thing I wanted to have in place.

In that case:

Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

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