This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


[Xen-users] More vcpus than physical cores and hvm

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] More vcpus than physical cores and hvm
From: "Alexandre Biancalana" <biancalana@xxxxxxxxx>
Date: Wed, 24 Sep 2008 18:32:32 -0300
Delivery-date: Wed, 24 Sep 2008 14:33:21 -0700
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:mime-version:content-type:content-transfer-encoding :content-disposition; bh=LOd1gHZsQ73W0bossINyRyM7pGKegfFmkxCvdeZ1MLQ=; b=eKqI2hyrJmNdT7Ua3HJurKuTKwDYtvQVMrIw6s9NskUOJYdLunWrIoC/+noz6wa2Xv 30Du6HBXGrVb+aBoURdP6+Pp/6VxLFrSZJeP2nkBpVZDkDW2fKAALUSvgld4Ux9NbK7Q +PLgxFmFcewGNYzxKR79iQFwj1OPVv38ydGEI=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type :content-transfer-encoding:content-disposition; b=CR75Nv4DLzgnp8nH3PpakEPWzVBz/1p/OtNjWWGaQ75fFL2WarKh+jFDjASo3Vkiuz 6mfjYS/4T/uC113L3G0zrtzftLHqO6zvEcSuZQlXd7ebaYHkR6UTpItXp4B6WSUYJwPl t+q0NxGV2MDC0j0rrX3Yj4XaTLnLpyvgNWZ0Q=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Hi List,

  I have a server with two QuadCore 2.93Ghz processors and 16GB Ram,
running Debian etch and Xen 3.2-1.

  Until yesterday I had in this server 2 hvm virtual machines, running
w2k, 4 vcpus each without any problem, the use of each virtual machine
rarely reach 70%. Today I cloned one of the virtual machines and
started they with 2 vcpus, right after I start this new guest the use
of cpus on the others guest vms showed by task manager climb to 50%
(kernel time)  and If I start another new guest with 2 vcpus, the
first two guests reach close to 100% of cpu use

  Can I have more vcpus than physical cores on Xen ?? There's
something to do with hvm ? Have some configuration (cpu scheduling) to
improve this situation ? Someone have a similar setup ?

 Best Regards,


Xen-users mailing list

<Prev in Thread] Current Thread [Next in Thread>