From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: time does not move forward in HVM guests
Date: Wed, 5 Jul 2017 10:51:56 +0200
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Am Wed, 05 Jul 2017 02:14:23 -0600
schrieb "Jan Beulich" <JBeulich@suse.com>:

> 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=3Dtsc there is a performance boos=
t because vdso is used. With clocksource=3Dhpet there is a performance drop=
 to 20%, depending on the workload, due to the emulation of it (I guess).

Olaf

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