[fedora-virt] Idle VM is hogging host cpu
Sven Lankes
sven at lank.es
Mon Nov 8 13:22:14 UTC 2010
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
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