Re: [Qemu-devel] WinXp Guest clock drift

[Magnus Damm <magnus.damm@gmail.com>]

On Tue, 22 Mar 2005 12:21:47 +0400, Brad Campbell <brad@wasp.net.au> wrote:
> Magnus Damm wrote:
> > On Mon, 21 Mar 2005 23:15:24 -0800, Mike Swanson
> > <mikeonthecomputer@gmail.com> wrote:
> >
> >>Well, this is probably a nuisance in all emulators :p
> >
> >
> > Does it have to be that way? I mean - if a media player can keep track
> > of the time of a movie (with and without sound) then wouldn't it be
> > possible for other applications like emulators to keep accurate time?
> >
> > I do not know how the time is handled in QEMU, but I wrote code some
> > years ago that monitored itself with gettimeofday() and adjusted the
> > drift on the fly.
> 
> I actually find all sorts of oddities with timing and qemu emulation. Sometimes when installing
> stuff in a windows guest the guest slows to a crawl until I move the mouse around or drag a window
> or something similar. Almost like it starts to go to sleep until it gets some user interaction.

I second that observation.

> There are a number of emulation oddities thus far, I just get used to them and work around them. I
> guess I should actually have a go at debugging them really.

The same goes for me...

/ magnus