Re: [libvirt-users] Windows guest eats as many CPU as available
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
For me it eats 10-20%, and I was not able to lower that (linux uses 0%). And if I am not mistaken, it eats 100% when you have chosen wrong ACPI parameters in domain.xml. Take a look at https://bugs.launchpad.net/ubuntu/+source/virt-manager/+bug/228442 On Tue, Jan 11, 2011 at 00:25, Matthias Meyer <Matthias.Meyer@gmx.li> 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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Am Montag 10 Januar 2011 schrieben Sie:
For me it eats 10-20%, and I was not able to lower that (linux uses 0%). And if I am not mistaken, it eats 100% when you have chosen wrong ACPI parameters in domain.xml. Take a look at https://bugs.launchpad.net/ubuntu/+source/virt-manager/+bug/228442
I change my HAL from SMP to Standard-PC and now it works great. Changing of HAL is descripted here: http://www.linux-kvm.com/content/running-windows-smp-guests Thanks, Matthias -- Don't Panic
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@gmx.li>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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participants (3)
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jeremy avnet -
Matthias Meyer -
Mike Ponomarenko