Re: [Xen-users] Poor Windows 2003 + GPLPV performance compared to VMWare

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-09-18 at 13:24 +0100, Adam Goryachev wrote:
> On 17/09/12 18:54, Ian Campbell wrote:
> > On Fri, 2012-09-14 at 14:30 +0100, Ian Campbell wrote:
> >>>> Does your system have any NUMA properties?
> >>> I don't really understand this question.... is there a simple method to
> >>> check? It is a AMD Phenom(tm) II X6 1100T Processor on a reasonable
> >>> desktop motherboard, nothing fancy....
> > I don't have a NUMA system to hand, but on my non-NUMA system I see in
> > the logs:
> > (XEN) No NUMA configuration found
> >
> > You should see that or something more informative.
> "xm dmesg|grep -i numa" produces no output, so again, I still have no
> definitive answer to this.
> 
> Actually, got it... :
> dmesg|grep -i numa
> [    0.000000] Scanning NUMA topology in Northbridge 24
> [    0.000000] No NUMA configuration found
> 
> That is not xen, that is the normal kernel... or perhaps xen has hidden
> the numa config from linux... I'm really not sure...
> > Also at least in 4.2 "xl info -n" gives some details. Not sure if xm has
> > the same option?
> This is getting better.
> xm info -n
> numa_info              : none
> 
> Amongst lots of other interesting information.
> 
> So, seems pretty definitive that there is no numa support here.
> 
> Is this still relevant to the diagnosis of very slow windows domu?

No, I was thinking of issues like front/backend on different NUMA nodes
and the like.

Ian.


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