[fedora-virt] Virtualization: qemu-kvm: Excessive CPU usage on host

[Dario Lesca]

Il giorno mar, 15/12/2009 alle 11.28 -0600, Justin M. Forbes ha scritto:
> 
> > Is this normal? 
> KSM has a penalty in that it requires CPU cycles to scan for usable
> pages.

> This should be mitigated by the ksm service turning the scanner off
> when it is not needed.
> Do you have any more information on the hardware profile? Is there a
> smolt profile for this system?

Yes :
        http://www.smolts.org/client/show_all/pub_9da3c016-41da-42f1-b2c3-05f31ffb88f5

> > It's possible do something to improve the situation? 
> Is the ksmtuned service running? 
Yes:
        [root at lesca ~]# /etc/init.d/ksmtuned status
        ksmtuned (pid  1522) in esecuzione...


> If not, please turn it on.  Optionally you can also turn off ksm and
> ksmtuned.

I have turn off ksm and ksmtuned but the qemu use always 15% cpu... none
is changed.

Thanks.

> 
> 

-- 
Dario Lesca <d.lesca at solinos.it>