Re: PV-vNUMA issue: topology is misinterpreted by the guest

[Dario Faggioli <dario.faggioli@citrix.com>]

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On Wed, 2015-07-22 at 14:10 -0400, Boris Ostrovsky wrote:
> On 07/22/2015 11:49 AM, Dario Faggioli wrote:

> > In fact, of course there are other issues (like the ones you're
> > mentioning, caused by this), but it's only with vNUMA that I see 2 out
> > of 4 vcpus completely lost! :-/
> 
> My guess would be that scheduling domains are not set up properly. And 
> perhaps because your test has lots of IO the load doesn't cross 
> thresholds that are needed to switch to another domain?
> 
I also things sched domains are involved. However, my test has no IO at
all, actually.

> Does it work the same way if you run a compiled busy loop (i.e. 
> 'main(){while(1);}')?
> 
Well, I can try, but I think that 'yes > /dev/null' (a bunch of them),
is really close to that.

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

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