Re: [Xen-devel] RE: [PATCH] rendezvous-based local time calibration WOW!

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 11/8/08 15:43, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote:

>> Depending on how critical this guarantee is, I wouldn't rely on Xen to
>> perform perfectly. Probably you should keep your lock.
> 
> Or maybe make it optional, and let people turn it on when VCPUs are
> pinned (VCPU migration doesn't make much sense to me for server
> workloads AFAICS).
> 
> That lock is *painful*.

What guarantee are you providing? Per thread, per address space, or global
monotonicity?

 -- Keir



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