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Date: Sat, 10 Jul 2004 16:00:02 +0400
From: Brad Campbell <brad@wasp.net.au>
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Subject: Re: [Qemu-devel] Reducing X communication bandwidth
References: <200407100945.06998.jseward@acm.org>
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To: jseward@acm.org, qemu-devel@nongnu.org

Julian Seward wrote:
> QEMU is great, but one specific problem has made it unusable
> for me so far.  The (fast) machine I want to run QEMU on is not
> the same as my (slow) machine which is on my desk. That is, 
> I want to do the usual X "export DISPLAY=someothermachine:0.0"
> game.
> 
> These machines are connected by an old-fashioned 10 Mbit/sec
> network, which you may argue is obsolete, but I would argue 
> represents reasonably the approximate bandwidth of 802.11b/g
> LANs which are common now.
> 
> Anyway, QEMU from cvs is unusable like this, at least when
> running WinXP or Win2K.  The SDL layer (qemu/sdl.c) blasts
> huge numbers of pixels across the network in response to even
> the simplest graphical operations.  Notably, moving the mouse
> pointer is appalling, with an update rate of about twice per
> second, which is hopeless.
> 

Great patch! This patch combined with ssh -X -C makes qemu usable over my wireless link between 
office and home. Still a little laggy but at least usable.

Cheers!
Brad