RE: [Xen-devel] Re: credit scheduler

To:	"Sean Dague" <japh@xxxxxxxxxx>, "Karl Rister" <kmr@xxxxxxxxxx>
Subject:	RE: [Xen-devel] Re: credit scheduler
From:	"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date:	Tue, 29 Aug 2006 22:37:34 +0100
Cc:	Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date:	Tue, 29 Aug 2006 14:37:57 -0700
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Thread-topic:	[Xen-devel] Re: credit scheduler

> A related issue I noticed the other day when doing xen testing off of
> xen-unstable was that the irqbalancer process ended up consuming 100%
of
> dom0 cpu when running an SMP Dom0 on the credit scheduler, and a bunch
of
> idle domUs.  It got the the point that ssh wasn't feasable, and I had
to go
> to the console and shut off irqbalancer to return things to normal.
> 
> I'd follow up further, but I'm about to go "off grid" for the next 2.5
> weeks.  I relayed information to other folks on the IBM team to see if
> anyone else can reproduce it.

No good can come of running irqbalancer in dom0, but it certainly
shouldn't end up burning CPU. Would be good to understand what's going
on here.

Thanks,
Ian

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RE: [Xen-devel] Re: credit scheduler