Re: Windows guest eats as many CPU as available

[jeremy avnet <brainsik+libvirt@xxxxxxxxxxxxx>]

IIRC, this was a problem with older versions of QEmu that was fixed later. Are you on a recent version? You should be able to run a single VCPU, Windows XP instance *without* ACPI and have low CPU usage. I've done it.

Note, this problem still exists for multi-VCPU XP instances.

.:. jeremy

On Mon, Jan 10, 2011 at 2:25 PM, Matthias Meyer <Matthias.Meyer@xxxxxx> wrote:

Am Montag 10 Januar 2011 schrieben Sie:

> On Mon, January 10, 2011 07:05, Matthias Meyer wrote:
> > Hello,
> >
> > I run Debian on my Laptop Lenovo X60s (with VT).
> > I've created a Windows-XP as well as a Windows-Vista guest on it.
> > Both, XP as well as Vista, eats as many CPU as available.
> > Therefore the CPU always has high load and will never reduce
cpu-frequenz
> > or ventilator.
>

> Can you check if there is a particular process inside Windows that is
> using all of the CPU via the Task Manager?
>
> Steve
>
>

No, there is only the idle-process ("Leerlaufprozess" in german) which need
96% of the CPU in an average.
In the same time KVM needs nearly 100% of my Host-CPU.

13895 ?        Sl    21:21 /usr/bin/kvm -S -M pc -m 256 -smp 1 -name
devel-xp -monitor pty -localtime -no-acpi -boot c -drive
file=/var/lib/libvirt/images/devel-xp.qcow2,if=ide,index=0,boot=on -drive
file=/mnt/MultiMedia/CD-Server/Betriebssysteme/Windows/WindowsNT/WindowsXPpro_sp2_de.iso,if=ide,media=cdrom,index=2 -net
nic,macaddr=54:52:00:61:dd:94,vlan=0 -net
tap,fd=14,script=,vlan=0,ifname=vnet0 -serial pty -parallel
none -usb -usbdevice tablet -vnc 127.0.0.1:0 -k de -soundhw es1370

br

Matthias
--
Don't Panic

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