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Re: [Qemu-devel] [PATCH] Reducing X communication bandwidth, take 2


From: Julian Seward
Subject: Re: [Qemu-devel] [PATCH] Reducing X communication bandwidth, take 2
Date: Wed, 14 Mar 2007 10:53:59 +0000
User-agent: KMail/1.9.5

On Wednesday 14 March 2007 04:57, Mark Williamson wrote:
> > > Here is a somewhat revised version of a patch I first made nearly
> > > three years ago.  The original thread is
> >
> > The idea here is quite similar to what the VNC server does now.
> >
> > If this is desirable for SDL too, then perhaps we should find a way to
> > fold this into common code?
> >
> > Although, is there a compelling reason to use SDL over X instead of VNC?
>
> I sometimes do this sort of thing because it Just Works with no manual
> configuring of port forwarding etc.  I don't necessarily like to do it for
> extended usage but it is very convenient.

Yes.  VNC is all very nice (I use it a lot) but is hassle to set up,
what with making holes in firewalls and/or port forwarding etc.  This
patch has the "it just works" property.

In fact I obtained (by far) the best remote X performance by using both
this patch and making the remote X connection with 
"ssh -XC -o CompressionLevel=1".  The patch knocks out the majority of
the data, and the ssh compression squashed what remained by more than a
factor of 10.  Doing this it was hard to tell that QEMU was not running
locally.

J




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