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! _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Zary Matej
2011-Jul-25 08:27 UTC
RE: [Xen-users] Can one VCPU use all physical CPUs in the host
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! _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Iain Kay
2011-Jul-25 08:51 UTC
Re: [Xen-users] Can one VCPU use all physical CPUs in the host
On 25 Jul 2011, at 01:35, xc l wrote:> 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?Rather than VCPU''s you can use CPU Pools in Xen 4.1.x to group multiple cores into one CPU Pool that can then be assigned to specific VPS. Not played with it myself yet but I know it''s possible! Iain _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users