Re: [PATCH 5/5] sched/arinc653: Implement CAST-32A multicore scheduling

[Jürgen Groß <jgross@xxxxxxxx>]

On 17.09.20 17:10, Stewart Hildebrand wrote:
> 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?
It has.

You can have a guest with only one vcpu running with any larger
granularity.


Juergen