According to mails on the ml we can reduce the load in a VM by changing the controller to which the tablet is connected to:
In the end the problem stays that usb uses a polling model versus the
async interrupt model ps2 uses.
If your guest supports usb 3.0 (aka xhci) you can try that. The
hardware design allows to not poll in the emulation, which brings down
the cpu load even more, should come pretty close to ps/2 mouse levels.
This goes in the same direction as some other changes we have to prepare for the future: q35, ich9-sound, etc.
Ticket moved from /p/foss-cloud/bugs/173/
Can't be converted: