Re: [Xenomai-help] xenomai scheduler's ticks period

[Philippe Gerum <rpm@xenomai.org>]

Matthieu wrote:
> Hi
> 
> I would like to know if there is a sheduler per CPUs or one scheduler for
> all CPUs ? I understand that there is one sheduler per skin for all CPUs,
> so it's only to be sure...

One global scheduler, per-CPU scheduling runqueues, per-skin timing obtained
through separate time bases, see /proc/xenomai/timebases. The reason why we have
time bases is documented:
http://www.xenomai.org/documentation/branches/v2.4.x/html/api/group__timebase.html

> 
> Well, my application has two working mode. One with a PCI hardware that
> send an interrupt to tickAnnounce the Scheduler ; one with no hardware and
> something that will simulate this hardware interrupt (something like a
> periodic xenomai real-time task that send this same interrupt). So I need
> to use an interrupt to tickAnnounce vxworks scheduler. I think that I have
> to disabe the periodic tick (but I don't know how), and I need an interrupt
> handler that send a tickAnnounce. It is during the execution that the
> presence of the PCI hardware is tested and whether a hardware interrupt or
> software interrupt is used. Can somebody explain me if it's possible, and
> in that case, how can I disable the automatic vxworks tick ?
>

modprobe xeno_vxworks tick_arg=0

> 
> 
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-- 
Philippe.