Re: [Xen-devel] Interrupt Affinity Question

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 14/4/07 09:06, "Pradeep Vincent" <pradeep.vincent@xxxxxxxxx> wrote:

> Wouldn't it be better to set dom0_vcpus_pin by default when dom0 is
> handling all the I/O. dom0 clearly should have high priority (weight)
> to avoid excessive I/O latency and hence none of the dom-0 vcpu would
> be left waiting in the runq for too long.
> 
> Only problem would be relatively rare schedule-latency hit due to lack
> of ability to migrate but I am wondering if this would be better
> trade-off.

If you have a high I/O workload your best bet is probably to dedicate at
least one core to dom0, pin it there, and schedule all domU's onto the
remaining cores in the system.

 -- Keir



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