On 02/02/2012 09:58 AM, Itamar Heim wrote:
On 02/01/2012 07:04 PM, Brown, Chris (GE Healthcare) wrote:
> Not a problem I am happy to help in any way that I can.
> To Clarify I executed the same tests with the same results using both RHEV and
> I am using:
> RHEV 3.0.1
> oVirt (FC16 + oVirt Nightly builds)
Hans - is there any downside/conflict if usbtablet is passed when local mouse/agent is
if not, we could pass usbtablet when booting a guest not known to have the agent
installed from previous run?
Yes, for most guests (*) this will cause a significant CPU load even when fully idle (USB
causes a 1000 vm-exits / sec). We just need to figure out why the relative mouse mode is
so poorly for Chris and fix it.
* For guests that don't do USB powermanagement for USB HID devices, which is almost
all of them
since many many real world HID devices are just too buggy. In recent Linux versions there
udev rules to recognize the qemu tablet, and in that case enable USB powermanagement, but
all other guests pay a 1000 vm-exits / sec price, which causes a couple of percents of CPU
on the host per vm.