Re: [Xen-devel] Xen/arm: Virtual ITS command queue handling

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 19/05/15 14:36, Ian Campbell wrote:
> On Tue, 2015-05-19 at 14:27 +0100, Julien Grall wrote:
>> With the multiple vITS we would have to retrieve the number of vITS.
>> Maybe by extending the xen_arch_domainconfig?
> 
> I'm sure we can find a way.
> 
> The important question is whether we want to go for a N:N vits:pits
> mapping or 1:N.
> 
> So far I think we are leaning (slightly?) towards the 1:N model, if we
> can come up with a satisfactory answer for what to do with global
> commands.

I was leaning toward the 1:1 model :).

I think the 1:N model will result to a more complex scheduling and would
slow down the emulation in environment where each domain is using a
different pITS.

Also there is the question of I/O Numa.

Regards,

-- 
Julien Grall

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