Re: [Hampshire] QEMU / KVM

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Author: Hugo Mills
Date:  
To: Hampshire LUG Discussion List
Subject: Re: [Hampshire] QEMU / KVM

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gpg: failed to create temporary file '/var/lib/lurker/.#lk0x57684100.hantslug.org.uk.3412': Permission denied
gpg: keyblock resource '/var/lib/lurker/pubring.gpg': Permission denied
gpg: Signature made Thu Mar 13 21:40:23 2008 GMT
gpg: using DSA key 20ACB3BE515C238D
gpg: Can't check signature: No public key
On Thu, Mar 13, 2008 at 09:24:02PM +0000, Simon Capstick wrote:
> Hugo Mills wrote:
> >On Thu, Mar 13, 2008 at 08:22:16PM +0000, Simon Capstick wrote:
> >>It looks like my VIA C7 just doesn't have the oomph for kqemu to run
> >>Windows XP fast enough to be useful. A faster Intel/AMD processor with
> >>virtualisation extensions looks necessary for this. I guess I will be
> >>powering up a noisy XP box occasionally instead.
> >
> > You can run qemu-based systems (qemu,kqemu,kvm) on a remote server
> >and connect to them over VNC, if that helps.
> >
> >>Am I right in presuming I can't run KQEMU or KVM on a (noisy but remote)
> >>server running the Xen hypervisor?
> >
> > kqemu *may* work, but I wouldn't guarantee it. KVM almost certainly
> >won't work.
>
> That's what I thought, thanks for confirming this. For the time being I
> have managed to speed up KQEMU a bit by disabling ACPI [1] in the
> Windows XP VM. The trouble is the qcow2 image is on a LUKS encrypted
> external disk thus crippling my performance further.


This may be of interest to you:

http://article.gmane.org/gmane.comp.emulators.kvm.devel/14393

That mail says it's not ready yet, but worth keeping an eye on.

I got a rough 2x performance increase on a kernel compile using
virtio for a Linux guest -- you'll find my mail on how I did it in
last months' HantsLUG list archives, and here[1].

Hugo.

[1] http://www.carfax.org.uk/docs/qemu-virtio/

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
  PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
         --- Quantum Mechanics: the dreams stuff is made of. ---