[libvirt-users] Processor usage of qemu process.

Daniel P. Berrange berrange at redhat.com
Fri Mar 13 09:23:52 UTC 2015

On Thu, Mar 12, 2015 at 07:16:56PM +0100, Dominique Ramaekers wrote:
> I have been using libvirt for a while now with some linux guest installed. And everything has been working great.
> I've got a nice new (used) HP virtual host with 12 x dual core and 48Gb mem. My Windows servers are getting old, so I found it was time to take the next step and also virtualise my Windows systems.
> Now I've got two Windows guests on my new host:
> - A Windows 8.1 which runs a Autodesk Job Processor
> - A Windows Server 2012 R2 which runs a Pervasive SQL, Autodesk Vault Server (MSSQL, IIS), Autodesk license server,...
> The first is constanly using 30% host-CPU and the second one is using 50% host-CPU. Both guests are using <5% guest CPU...
> (Host system load is between 0.1 and 0.3...)
> Is it normal Windows guests take up 30% to 50% host CPU resources? The Windows 8.1 is actualy a simpel PC with almost no activity...
> Version:
> QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.10), Copyright (c) 2003-2008 Fabrice Bellard

If would be helpful if you showed the XML config file for your
guests, so we can see what hardware you've configured. Hardware
choices can make a big difference to guest performance.

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