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RE: [PATCH 5/5] sched/arinc653: Implement CAST-32A multicore scheduling
- To: Jürgen Groß <jgross@xxxxxxxx>, Jeff Kubascik <Jeff.Kubascik@xxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Stewart Hildebrand <Stewart.Hildebrand@xxxxxxxxxxxxxxx>
- Date: Thu, 17 Sep 2020 15:10:30 +0000
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- Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxx>, Josh Whitehead <Josh.Whitehead@xxxxxxxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>
- Delivery-date: Thu, 17 Sep 2020 15:10:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH 5/5] sched/arinc653: Implement CAST-32A multicore scheduling
On Thursday, September 17, 2020 5:04 AM, Jürgen Groß wrote:
>On 16.09.20 20:18, Jeff Kubascik wrote:
>> This change is an overhaul of the ARINC653 scheduler to enable CAST-32A
>> multicore scheduling. CAST-32A specifies that only one partition
>> (domain) can run during a minor frame, but that domain is now allowed to
>> have more than one vCPU.
>
>It might be worth to consider using just the core scheduling framework
>in order to achive this. Using a sched_granularity with the number of
>cpus in the cpupool running ARINC653 scheduler should already do the
>trick. There should be no further midification of ARINC653 scheduler
>required.
>
This CAST-32A multicore patch series allows you to have a different number of
vCPUs (UNITs, I guess) assigned to domUs. For example, dom1 has a single vCPU,
and dom2 has 4 vCPUs. I didn't think the core scheduling framework had this
flexibility?
Stew
>
>Juergen
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