Can one VCPU use all physical CPUs in the host

Can one VCPU use all physical CPUs in the host

[xc l]

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Hi all

I have a multi-core physical machine, and I run domain-1 whose VCPU count is
one, Can this VCPU use all the processors in the host?

Many thanks!

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RE: Can one VCPU use all physical CPUs in the host

[Zary Matej]

Hi, it can use just one physical CPU at time. If the VCPU is not pinned on particular CPU (CPU core), it can be migrated over various physical CPUs over time by Xen. But it cannot "aggregate" performance of more physical CPUs. It will utilize 100% of single physical core in the best scenario. :)

Regards

Matej
________________________________________
From: xen-users-bounces@lists.xensource.com [xen-users-bounces@lists.xensource.com] On Behalf Of xc l [nudtxcl@gmail.com]
Sent: 25 July 2011 02:35
To: xen-devel@lists.xensource.com; xen-users@lists.xensource.com
Subject: [Xen-users] Can one VCPU use all physical CPUs in the host

Hi all

I have a multi-core physical machine, and I run domain-1 whose VCPU count is one, Can this VCPU use all the processors in the host?

Many thanks!