RE: [Xen-devel] dom0 starves guests off CPU

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

I found this too when doing a compile in dom0. Search the archives for a
thread titled 'Performance problems' from January this year.

Something like:
xm sched-sedf <domID> 0 0 0 1 1

was suggested there and it works for me!

At a guess, the default scheduling assumes that all of dom0's work is
going to be related to serving data (block and network) to domU's, so it
makes sense to give it priority.

James

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Rik van Riel
> Sent: Tuesday, 21 February 2006 10:22
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] dom0 starves guests off CPU
> 
> When running a "while : ; do : ; done&" loop in dom0, I saw that
> none of the guest domains were receiving any CPU time for seconds,
> quite possibly more than a minute.
> 
> The guest domains did not get significant CPU time until the
> inifinite loops in dom0 were terminated.  I am currently reading
> the EDF code to figure out what's going on, but would appreciate
> hints that shorten my search...
> 
> --
> All Rights Reversed
> 
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