[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-users] how many VCPUs per physical CPU?

  • To: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: Peter Peltonen <peter.peltonen@xxxxxxxxx>
  • Date: Mon, 6 Jul 2009 15:48:07 +0300
  • Delivery-date: Mon, 06 Jul 2009 05:48:49 -0700
  • Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=v0BYIrwKUND0//tMcKN2D7v0lQVB0UoRuTfu4w30dVSk7zZBWYVehnGcKswGhmVHkB smFXNS8W50fKWJu7i5oCfmLxwMwhij34EmqPIYyeI4BFcWbJF5W2OkSw67WojGO5x1Wx DibA+UeLtwmwpmvcDiupWPfjt9zPR/N/K2yR4=
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi list,

I have a machine with  Intel Xeon E5420 quad core processor and I'm
now wondering how to divide the CPU between all Xen instances.

I am running one qmail based mail server and several LAMP web servers.
The server OS is CentOS Linux.

What I've learnt from the archives is that dom0 should have its own
dedicated core.

But what about the rest, the mail server needs most CPU time, so I
could dedicate a core for it too. Would id benefit from having access
to the "pool" of the remaining cores too?

And what about VCPUs. Would a dom0 or domU benefit having say 2 VCPUs
and running an SMP kernel while in reality it is running only on 1
physical core?


Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.