Re: Partitioned Scheduling

On Mon, Sep 5, 2016, 2:57 PM Daniel Krefft <[email protected]> wrote:

> Hi,
>
> if I understand it right, there is only one scheduler in the kernel
> realizing one distinct scheduling strategy (e.g. fixed prio). However,
> given a multi-core system, several (all) cores are using *this* strategy
> in an independent core-local style. I'm right?
>
> So, the questions are:
>
> - How can I enhance this approach for several scheduling schemes (not
> only one)?
>
> - Where does the mapping between core and scheduling scheme happen?
> (e.g. compile-time/run-time)
>
> - Which files do I need to change?
>
> Maybe you can help me to get the big picture (flow chart) of scheduling
> in Fiasco.OC because it is vital for the next steps and our research.
>
> Best regards,
> Daniel
>
> --
> Daniel Krefft MSc.
> Wissenschaftlicher Mitarbeiter
>
> Technische Universitaet Muenchen
> Fakultaet fuer Informatik
> Lehrstuhl fuer Betriebssysteme
>
> Arcisstrasse 21
> 80333 Muenchen
>
> Tel. +49 89 289 18791
>
> [email protected]
> www.os.in.tum.de/personen/krefft
>
> On 02.09.2016 23:05, Adam Lackorzynski wrote:
> >
> > On Fri Sep 02, 2016 at 20:03:01 +0000, Edinger, Stefan wrote:
> >> How does Fiasco.OC manage its Cores ?
> >> Is it possible to execute more than one SchedContext on a multi-core
> CPU?
> >
> > Each core runs its own scheduler and the schedulers are independent of
> > each other. Thus they run in parallel and process Schedcontexts on their
> > own.
> >
> >
> >
> > Adam
> >
> >
> >> -----Ursprüngliche Nachricht-----
> >> Von: Adam Lackorzynski [mailto:[email protected]]
> >> Gesendet: Montag, 29. August 2016 23:03
> >> An: Edinger, Stefan
> >> Cc: [email protected]
> >> Betreff: Re: Partitioned Scheduling
> >>
> >> Hi,
> >>
> >> On Sun Aug 28, 2016 at 18:17:24 +0000, Edinger, Stefan wrote:
> >>> is it possible to have partitioned scheduling in the way that one can
> >>> use different schedulers for different cpu-cores?
> >>
> >> No, there's just one scheduler in the kernel, for all cores.
> >> However, given that scheduling is core-local only, cores could
> principally also have different schedulers.
> >>
> >>> And if yes, can I do the mapping from scheduler to core on runtime or
> >>> is it done at compile time?
> >>
> >>
> >
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>
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