Re: [Xen-devel] time does not move forward in HVM guests

[Olaf Hering <olaf@xxxxxxxxx>]

Am Wed, 05 Jul 2017 02:14:23 -0600
schrieb "Jan Beulich" <JBeulich@xxxxxxxx>:

> Oh, even for HVM. Doesn't that go back to the missing vDSO
> support then again, which we had discussed just last week?

Yes. This is part of it. With clocksource=tsc there is a performance boost 
because vdso is used. With clocksource=hpet there is a performance drop to 20%, 
depending on the workload, due to the emulation of it (I guess).

Olaf

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