[Xen-devel] Re: TSC scaling and softtsc reprise, and PROPOSAL

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 23/07/2009 17:39, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

>> Why would you expect host TSC consistency running on Xen to
>> be worse than
>> when running on a native OS?
> 
> In short, it is because a new class of machine
> is emerging in the virtualization space that
> is really a NUMA machine, tries to look like
> a SMP (non-NUMA) machine by making memory access
> fast enough that NUMA-ness can be ignored,
> but for the purposes of time, is still a
> NUMA machine.

Okay, so the issue you are worried about is not specific to Xen. So how is
native Linux tackling this, for example?

 -- Keir



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