[fedora-virt] Idle VM is hogging host cpu

[Sven Lankes]

On Mon, Nov 08, 2010 at 12:38:22PM +0000, Daniel P. Berrange wrote:

> Try adding   divider=10  to the kernel boot command line for the guest.
> This will make it use a 100HZ tick rate, instead of 1000HZ, lowering the
> background idle load on the host. I doubt it accounts for 20%, but it is
> always worth doing for RHEL5 kernels since they don't have tickless mode.

I was seeing 10 - 15% cpu for the kvm process too. After adding
divider=10 this dropped to 1%.

-- 
sven === jabber/xmpp: sven at lankes.net