[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-users] present domU with 1 CPU with multiple cores
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Jonathan Salomon > Sent: Tuesday, June 23, 2009 4:30 AM > To: xen-users@xxxxxxxxxxxxxxxxxxx > Subject: [Xen-users] present domU with 1 CPU with multiple cores > However to make sure that Dom0 will always respond even when > the DomU instances have a high load, I want to keep CPU 0 available > only for Dom0. Therefore in the DomU config files I'm using the following > CPU definition: cpus="1-3". Does it makes sense to do this? > Or would Xen handle this better on its own? I think it's a good idea. If your domU load is CPU-intensive, dom0 may not need to run often. However that is often not the case, and each domU may frequently need to perform either disk or network I/O. Dom0 needs to be scheduled on an available CPU to complete that I/O, since it hosts the driver backend. > Also how do I see on which physical CPU a DomU instance is running? Take a look at "xm vcpu-list". -Jeff _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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