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[Xen-users] Xen CPU overhead

from [Lien Deboosere]

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Subject:	[Xen-users] Xen CPU overhead
From:	Lien Deboosere <lien.deboosere@xxxxxxxxxxxxxx>
Date:	Fri, 21 Aug 2009 17:34:40 +0200
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Hello,

I'm currently doing some tests with Xen 3.4 and the basic Linux 2.6.18(Debian Lenny).When the CPU on my domU is loaded for 10% (not IO bounded, just simpleCPU load), the CPU load I measure with xentop on my dom0 shows 18%.

This overhead seems a lot to me, or is this normal?

Thx,
Lien

PS: I'm generating the CPU load in the domU with the tool "lookbusy"

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