From: Avi Kivity <avi@redhat.com>
To: Thomas Beinicke <thomas.beinicke@fsd-web.de>
Cc: KVM mailing list <kvm@vger.kernel.org>
Subject: Re: High CPU load on target host after migration
Date: Thu, 06 May 2010 12:23:20 +0300 [thread overview]
Message-ID: <4BE28A88.7020805@redhat.com> (raw)
In-Reply-To: <201004282314.41209.thomas.beinicke@fsd-web.de>
On 04/29/2010 12:14 AM, Thomas Beinicke wrote:
> Hi,
>
> I have been toying around with kvm / libvirt / virt-manager and it's migration
> feature.
> Both host machines are running a 2.6.33 Kernel.
>
> One host is a Dual Quad Core Intel Xeon E5520 @ 2.27GHz and the other is a
> Dual Quad Core Intel E5420 @ 2.50GHz.
>
> Migrating Linux machines works great but Windows XP SP3 is giving me a
> headache.
> The migration process finishes without any crash/error but the CPU load on the
> target host is ~50% on two cores. There is no CPU intensive task running
> inside the VM though.
> "Removing" the network card from the VM and migrating it between the two
> machines doesn't seem to trigger the high CPU load.
> As network driver I tried the realtek and Red Hat virtio driver but it doesn't
> seem to make a difference.
>
> Any insights on what could cause this situation and how to best debug it?
>
>
Can you run a profiler and see where qemu (or kvm) is spending its time?
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-05-06 9:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-28 21:14 High CPU load on target host after migration Thomas Beinicke
2010-05-06 9:23 ` Avi Kivity [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-04-30 21:19 Thomas Beinicke
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