Re: [Xen-devel] PV-vNUMA issue: topology is misinterpreted by the guest

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Wed, 2015-07-29 at 08:04 +0200, Juergen Gross wrote:
> On 07/28/2015 06:17 PM, Dario Faggioli wrote:
> >> On 07/28/2015 06:29 AM, Juergen Gross wrote:
> >
> >>> I'll make some performance tests on a big machine (4 sockets, 60 cores,
> >>> 120 threads) regarding topology information:
> >>>
> > I'm asking this because, with hyperthreading involved, I've sometimes
> > seen things being the worse when *not* (over)saturating the CPU
> > capacity.
> 
> Hmm, oversaturation shouldn't happen here. I've added -j 240 to let it
> happen.
> 
Oh, sorry... I was doing the math wrong (I was not counting the threads,
which is funny, as this is pretty much all about threads! :-O)

> I think I'll have another try with a domU. This could be much more
> "random" than dom0.
> 
Indeed!

Thanks and Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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