Re: [Xen-devel] [PATCH 1 of 3 v5/leftover] libxl: enable automatic placement of guests on NUMA nodes [and 1 more messages]

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2012-07-18 at 01:22 +0100, Dario Faggioli wrote:

> So, to summarize, I can't be farther than saying the current algorithm
> is perfect or fast. Rather, I'm definitely saying it has the advantage
> of not branching out the problem space too much aggressively at this
> early stage, and it is flexible enough for avoiding getting unreasonable
> performances, or at least, it looks like that to me, I guess. :-)

I'm not quite following what you are trying to say with all this.

Are you saying that the code as most recently submitted does not have
the O( C(nr_nodes,min_nodes) ) property which Ian J suggests, which
leads to needing to process hundreds of millions of combinations for a
16 / 32 node guest? Or are you saying that it does have this property
but it doesn't matter? Or are you saying it does have this property but
you intend to ameliorate it somehow? If the latter then how and for
which release(s) (4.2, 4.3 or 4.2.1)?

Ian.



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