Re: [Xen-devel] Re: xen, OpenMosix + pretty gui = virtual iron killer

[Moshe Bar <moshe.bar@xxxxxxxxxxxx>]

My guess is they didn't solve false sharing problems at all, and on top 
of that the true sharing issues will always stay there.
Especially the slab allocator of Linux is bound to create lots of false 
and true sharing.
Moshe


On Feb 21, 2005, at 7:43 PM, David Rottenburg wrote:

> Orran Y Krieger <okrieg <at> us.ibm.com> writes:
> > The impression I got from a couple of questions to
> > the speaker was that they supported DSM in the hypervisor, and that 
> > the
> > Linux was not terribly aware.  OpenMosix + Xen could do much better
> > I think.  Interesting synchronization questions to be worked out 
> > though.
> >            -- Orran> Date: Fri, 18 Feb 2005 11:04:35 -0000
> > > To: "Denis Bohm" <denis <at> fireflydesign.com>,
> > >    "Jerry Normandin" <jerryn <at> nfnnet.org>
> > > Subject: Re: [Xen-devel] xen, OpenMosix + pretty gui = virtual iron
> > killer
> My understanding was that they completly virtualize the underlying 
> hardware to
> construct a large virtual SMP without any mods to the Linux kernel, 
> very
> different than what Xen does with its paravirtualization approach.  I 
> wonder
> how they solved false sharing problems in the kernel.
>
> David
>
>
>
>
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