Re: [Qemu-devel] Re: [RFC][PATCH] Add HPET emulation to qemu (v2)

[Samuel Thibault]

Jamie Lokier, le Sun 10 Aug 2008 02:19:01 +0100, a écrit :
> Samuel Thibault wrote:
> > Beth Kon wrote some time ago:
> > > But for an idle guest in both cases (with and without HPET), the
> > > number of wakeups per second was relatively low (28).
> > 
> > Oh, btw, did you try to reduce the qemu window? (or disconnect the VNC
> > client if you are using VNC)  28 might be just because of the gui refresh
> > rate.  Reducing the window will lower the gui refresh rate to 2Hz.
> 
> If the guest isn't drawing anything to video memory, and there are no
> GUI events (e.g. redraw requests), why does the gui keep refreshing?

It needs to poll the keyboard activity at least, IIRC SDL doesn't
provide the X FD to poll.

Samuel