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Re: [Qemu-devel] Monitoring Screen Activity in QEMU/KVM
From: |
Richard W.M. Jones |
Subject: |
Re: [Qemu-devel] Monitoring Screen Activity in QEMU/KVM |
Date: |
Wed, 26 Jun 2013 14:06:58 +0100 |
User-agent: |
Mutt/1.5.20 (2009-12-10) |
On Wed, Jun 26, 2013 at 07:47:47AM +0530, Shehbaz Jaffer wrote:
> I want to determine the amount of screen activity taking place on VGA
> monitor/ Screen for different applications (eg. playing vlc video, normal
> typing.)
>
> When I do not start the X server, I can easily determine the screen
> activity by counting the number of pages accessed in the region 0xA0000 -
> 0xBffff (This is the VGA Monitor region in boot screen).
>
> However when I start the X Server, A diffrent set of pages are hit. Could
> anyone please explain how the VGA Monitor works in QEMU?
qemu emulates a PCI device. Probably an ancient Cirrus Logic CL 5446,
but other devices are possible.
> Or if someone
> could suggest an alternate solution to determine amount of screen activity
> while playing diffrent applications?
I would take an existing VNC client and modify it to log the "screeen
activity" you want to log. VNC is a well-documented protocol, there
are several high quality open source clients [gtk-vnc is the one I'd
pick], and doing this means the guest can run at full speed.
It depends a lot on how you define "screen activity".
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top