On Wed, Mar 17, 2021 at 06:00:37PM +0100, Reinoud Zandijk wrote: > On Wed, Mar 17, 2021 at 04:18:53PM +0000, Daniel P. Berrangé wrote: > > On Wed, Mar 17, 2021 at 05:11:22PM +0100, Reinoud Zandijk wrote: > > > when executing Qemu with > > > > > > qemu-system-x86_64 -m 4G -smp cores=2 -M q35 -snapshot \ > > > -drive file=/home/reinoud/Downloads/Win10-demo.raw,format=raw \ > > > -rtc base=localtime,clock=host -spice port=5924,disable-ticketing=on \ > > > -vga qxl -usb -device usb-tablet -net nic -net > > > tap,ifname=tap0,script=no > > > > > > my cpu usage in Windows10 *allways* reports 100% cpu usage. On the host > > > system > > > its always 190%+ ie it is really taking two cores completely. > > > IIRC, "-usb" still adds a USB-1 controller and that's known to be bad for > > causing high load in Windows guests in particular. So before debugging > > anything else, I'd suggest configuring a USB-3 controller instead - see > > docs/usb2.txt XHCI info. > > I tried that and added `-device qemu-xhci' instead of the `-usb' and it indeed > showed an USB 3 interface. It didn't help though; its still consuming 100% CPU > from both configured CPUs. > > When I completely remove USB, i get the jagged mouse again but it makes no > difference :-/
Possibly you need some of the hyperv enlightenments enabled too. Though I can't recall the precise command line offhand, as I just rely on virt-install virt-manager to do the right thing for Windows guests. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
