* Xenomai scheduler
@ 2021-02-01 7:47 Leandro Bucci
2021-02-01 8:11 ` Jan Kiszka
0 siblings, 1 reply; 5+ messages in thread
From: Leandro Bucci @ 2021-02-01 7:47 UTC (permalink / raw)
To: xenomai
hi, I wanted to know how the Xenomai scheduler works. If I assign three
tasks to processor CPU 0 and four tasks to processor CPU 1, is it possible
that the tasks will run simultaneously (one on CPU 0 and one on CPU 1)?
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Xenomai scheduler
2021-02-01 7:47 Xenomai scheduler Leandro Bucci
@ 2021-02-01 8:11 ` Jan Kiszka
2021-02-01 8:15 ` Leandro Bucci
0 siblings, 1 reply; 5+ messages in thread
From: Jan Kiszka @ 2021-02-01 8:11 UTC (permalink / raw)
To: Leandro Bucci, xenomai
On 01.02.21 08:47, Leandro Bucci via Xenomai wrote:
> hi, I wanted to know how the Xenomai scheduler works. If I assign three
> tasks to processor CPU 0 and four tasks to processor CPU 1, is it possible
> that the tasks will run simultaneously (one on CPU 0 and one on CPU 1)?
>
Yes.
Xenomai does no load balancing, i.e. it does not touch the affinity you
assign - or the one Linux picked during startup if you do not assign
anything.
Jan
--
Siemens AG, T RDA IOT
Corporate Competence Center Embedded Linux
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Xenomai scheduler
2021-02-01 8:11 ` Jan Kiszka
@ 2021-02-01 8:15 ` Leandro Bucci
0 siblings, 0 replies; 5+ messages in thread
From: Leandro Bucci @ 2021-02-01 8:15 UTC (permalink / raw)
To: Jan Kiszka, xenomai
great thanks for the reply
Il lun 1 feb 2021, 09:11 Jan Kiszka <jan.kiszka@siemens.com> ha scritto:
> On 01.02.21 08:47, Leandro Bucci via Xenomai wrote:
> > hi, I wanted to know how the Xenomai scheduler works. If I assign three
> > tasks to processor CPU 0 and four tasks to processor CPU 1, is it
> possible
> > that the tasks will run simultaneously (one on CPU 0 and one on CPU 1)?
> >
>
> Yes.
>
> Xenomai does no load balancing, i.e. it does not touch the affinity you
> assign - or the one Linux picked during startup if you do not assign
> anything.
>
> Jan
>
> --
> Siemens AG, T RDA IOT
> Corporate Competence Center Embedded Linux
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Xenomai scheduler
2020-12-05 8:22 Leandro Bucci
@ 2020-12-07 6:55 ` Jan Kiszka
0 siblings, 0 replies; 5+ messages in thread
From: Jan Kiszka @ 2020-12-07 6:55 UTC (permalink / raw)
To: Leandro Bucci, xenomai
On 05.12.20 09:22, Leandro Bucci via Xenomai wrote:
> hi, i have a doubt about the Xenomai scheduler. When I create multiple
> tasks, are they assigned to the various available system CPUs? if I have
> two tasks T1 and T2, where T1 has high priority and T2 low priority, and my
> system has 4 CPUs, does Xenomai assign T1 and T2 to two different
> processors (to optimize) or does it assign them to the same processor?
>
Xenomai does not implement any kind of load-balancing algorithm. It
simply takes the CPU the Linux part of the thread was running on during
creation. It furthermore accepts any explicit affinity assignments
during runtime. So it's up to you to design the optimal RT thread
placement for your system.
Jan
--
Siemens AG, T RDA IOT
Corporate Competence Center Embedded Linux
^ permalink raw reply [flat|nested] 5+ messages in thread
* Xenomai scheduler
@ 2020-12-05 8:22 Leandro Bucci
2020-12-07 6:55 ` Jan Kiszka
0 siblings, 1 reply; 5+ messages in thread
From: Leandro Bucci @ 2020-12-05 8:22 UTC (permalink / raw)
To: xenomai
hi, i have a doubt about the Xenomai scheduler. When I create multiple
tasks, are they assigned to the various available system CPUs? if I have
two tasks T1 and T2, where T1 has high priority and T2 low priority, and my
system has 4 CPUs, does Xenomai assign T1 and T2 to two different
processors (to optimize) or does it assign them to the same processor?
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-02-01 8:15 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2021-02-01 7:47 Xenomai scheduler Leandro Bucci
2021-02-01 8:11 ` Jan Kiszka
2021-02-01 8:15 ` Leandro Bucci
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2020-12-05 8:22 Leandro Bucci
2020-12-07 6:55 ` Jan Kiszka
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