Re: [fedora-virt] 20% cpu usage spikes with idle centos 5.3 guest on F11
On 06/25/2009 03:55 PM, Don Dutile wrote:
Dennis J. wrote:
> Hi,
> When I run a centos 5.3 x86_64 guest on my F11 x86_64 system with kvm I
> see the qemu-kvm process cpu usage jump to ~20% every few seconds even
> though the guest is completely idle (I even disabled the HAL polling for
> /dev/hdc). Does anyone have an idea what could be the cause of this or
> how find the reason for this behavior?
>
> Regards,
> Dennis
>
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Try turning off the network (ifcfg eth0 down) in the guest&
see if the cpu usage goes away. if so, it's probably network
polling mis-behaving. if not, then send details
(kernel revs; #pcpu's, #vcpu's in guest, etc.
I shut down the interface using "ifdown eth0" but that didn't change
anything. I filed a bug here:
https://bugzilla.redhat.com/show_bug.cgi?id=508109
It contains additional information about the environment and an attached
screenshot showing the peaks in virtual-machine-manager in more detail.
Regards,
Dennis