On 06/10/2010 09:12 AM, Dor Laor wrote:
On 06/09/2010 05:35 PM, Gerd Hoffmann wrote:
Hi,
with 0.12.4 it is still the case that a total idle vm takes about 6-8%
of a 2.4GHz Xeon Core.
I see that order of magitude too, no matter whenever usb is on or off.
With older qemu and usbtablet it used to be up to 25%.
Is it possible to dynamically control the refresh internally within qemu
so VMs without a connected VNC client will have rare refreshes or no
refresh at all? I hope it's not the OS who polls it.
vnc/vga or usb tablet?
For the vga it happens already, with no vnc client connected vnc zaps
the refresh timer and stops calling vga_hw_update(), thus vga stops
doing framebuffer dirty tracking too.
For usb hid devices: No idea how they work and whenever we can put them
into sleep somehow (with/without guest cooperation).
cheers,
Gerd