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Re: [Xen-users] HVM guest high CPU usage

To: "Homer Simpson" <homersimpson199@xxxxxxxxx>

From: "Thiago Camargo Martins Cordeiro" <thiagocmartinsc@xxxxxxxxx>

Date: Tue, 16 Sep 2008 19:25:08 -0300

Delivery-date: Tue, 16 Sep 2008 15:25:47 -0700

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List-id: Xen user discussion <xen-users.lists.xensource.com>

Why you don't use paravirtualized guests to run your Debian Etch?
HVM is only necessary when you want to run Windows or very old Linux guests.

Paravirtualization is the best way to run you Debian Etch domUs.

2008/9/16 Homer Simpson <homersimpson199@xxxxxxxxx>

I have couple of HVM guests on xen 3.2. When guests boot, qemu-dm uses alot of cpu for approx 20 minutes post boot then load drops to average 0.50. I did some debugging and see this is going on, I suspect display output is using the CPU. Disabling VNC and SDL didn't help with the CPU usage. any ideas how to reduce the cpu or stop it all together?

My setup is as following:

Xen hypervisor: 3.2

OS: Debian Etch 64 bit

Server: Dual Xeon / 8 GB memory

HVM Guests: Debian etch 32 bit

Thanks,

Mark

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