Re: [fedora-virt] Idle VM is hogging host cpu
On 11/08/2010 04:40 PM, Richard W.M. Jones wrote:
On Mon, Nov 08, 2010 at 04:30:37PM +0100, Dennis Jacobfeuerborn
wrote:
> I get that but why wasn't this affecting F11 as well? AFAIK Fedora 11 had a
> tickless kernel so something else clearly changed between F11 and F14 that
> causes this.
Dan is talking about the guest kernel, not the host kernel.
Maybe there is a misunderstanding here.
What I'm saying is that the same guest is running on tickless kernels in
both cases (F11 and F14) yet on the F14 kernel it uses 20% cpu whereas it
uses just 1-2% on F11. So this leaves two questions:
What else besides tickless-ness in the host kernel is causing that the
identical guest uses much more cpu resources on the f14 kernel.
Why is the "divider=10" for the guest necessary on f14 but not on f11?
Regards,
Dennis