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Re: [Qemu-devel] WinXp Guest clock drift

From: Brad Campbell
Subject: Re: [Qemu-devel] WinXp Guest clock drift
Date: Tue, 22 Mar 2005 12:21:47 +0400
User-agent: Mozilla Thunderbird 1.0 (X11/20050115)

Magnus Damm wrote:
On Mon, 21 Mar 2005 23:15:24 -0800, Mike Swanson
<address@hidden> 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.

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.

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