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[Xen-users] How can PV be slower than PVHVM?

  • To: xen-users@xxxxxxxxxxxxxxxxxxxx
  • From: Steffen Einsle <einsle@xxxxxxxxxx>
  • Date: Thu, 17 Jan 2019 13:10:29 +0100
  • Delivery-date: Thu, 17 Jan 2019 12:10:38 +0000
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  • List-id: Xen user discussion <xen-users.lists.xenproject.org>

Hi there,

after reading the PV vs PVHVM performance comparison at


but I still cannot accept how a fully emulated system can even come close to the performance of a PV-only system. Every translation layer must add some overhead - right? So a true PV system without translation layer should (imho) be at the top of the performance list?

Or does the mentioned comparison apply only to debian on xen-orchestra?

My system is a barebone gentoo xen 4.10 Dom0 and multiple gentoo PV DomUs in PV mode - and now I'm confused...

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