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From: Paul Brook <paul@codesourcery.com>
Date: Tue, 20 Jan 2009 01:33:23 +0000
References: <20090119162633.GO29175@csclub.uwaterloo.ca>
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Subject: [Qemu-devel] Extremely slow graphic updates (was: qemu-system-ppc
	seems slow today)
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To: qemu-devel@nongnu.org
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Lennart Sorensen <lsorense@csclub.uwaterloo.ca>

> 'ssh -X fastserver' and running qemu there.  With the new display code
> this has made qemu very slow and hardly useable.

I'm seeing similar extreme slowness even on a local machine.

Particularly noticeable is that the monitor displayed on a qemu virtual SDL 
console (i.e. the defaut) slow enough to be practically unusable. It's taking 
the best part of a second to rendering a character.

This is on an otherwise fast machine that does not have accelerated X drivers, 
which suggests we're doing something really dumb like reading from video ram.

I have confirmed that this is caused by r6336.

Paul