Re: [Xen-users] high cpu usage on steal time

[Peter Viskup <skupko.sk@xxxxxxxxx>]

On 02/02/2013 12:54 AM, Linux Hack wrote:
> Hi,
>
> One of the server is under high cpu usage and when checked steal time 
> is causing the high cpu usage. However I have pinned the vcpu's for 
> dom0 dedicatedly but still no luck.
> Any thought's that would be great?
I had the same issue. Looks like things changed with newer PvOPs kernels 
(2.6.32+) and now the old fashioned setup of dedication of one CPU for 
dom0 (xm vcpu-pin 0 all 0) is causing performance issues and very high 
steal time on dom0. In my case I wasn't able to start any domU as the 
dom0 had not enough CPU time and it just ended with error (due to some 
timeout). Unfortunately nor Ian Campbell was able to tell me what is the 
reason of this behavior and what was changed.
Best regards,
--
Peter Viskup

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