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Re: [Xen-devel] [PATCH v6 05/11] pvqspinlock, x86: Allow unfair spinlock in a PV guest

Il 17/03/2014 20:05, Konrad Rzeszutek Wilk ha scritto:
> Measurements were done by Gleb for two guests running 2.6.32 with 16
> vcpus each, on a 16-core system.  One guest ran with unfair locks,
> one guest ran with fair locks.  Two kernel compilations ("time make
And when you say fair locks are you saying PV ticketlocks or generic

Generic, of course.

You should see the same values with the PV ticketlock. It is not clear
to me if this testing did include that variant of locks?

Yes, PV is fine. But up to this point of the series, we are concerned about spinlock performance when running on an overcommitted hypervisor that doesn't support PV spinlocks.


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