Re: [Xenomai-help] New scheduler class

[Philippe Gerum <rpm@xenomai.org>]

On Mon, 2011-03-28 at 12:56 +0200, Henri Roosen wrote:
> Hi,
> 
> We are using the back-ported auto-relax patches of Xenomai-head on the
> 2.5.6 release on Linux 2.6.32.15.
> 
> We noticed that our prio-0 shadowed task is not always auto-relaxed
> and traced it back to a problem with rt_task_send/receive/reply. The
> rt_task_send/receive/reply mechanism uses the xnsynch primitive to
> implement its PIP. However, this mechanism only acquires the xysynch
> primitive without releasing it. This results in the resource counter
> never be 0 anymore and thus breaking the auto-relaxed which is based
> on this resource counter.
> 
> I guess releasing the xnsynch resets the owner, which is not wanted either..
> Any idea for a fix?
> 

The main issue is that this interface is totally at odds with the
fastsync support. Will have a look.

> Thanks,
> Henri.
> 
> 
> On Tue, Oct 12, 2010 at 9:16 AM, Henri Roosen <henriroosen@domain.hid> wrote:
> > That was a problem with our build environment.
> >
> > Patches work and the base-prio 0 task nicely switches to the Linux
> > domain and competes with the Linux threads for the processor. Now we
> > don't loose TCP connection to our target anymore.
> >
> > Thanks!
> >
> > Henri
> >
> > On Mon, Oct 11, 2010 at 5:35 PM, Henri Roosen <henriroosen@domain.hid> wrote:
> >> Thanks for the patches Philippe. I applied them to xenomai 2.5.5.
> >> Tests with a basic application look good, however our bigger project
> >> doesn't. I checked already if we release all mutexes; the base prio 0
> >> thread thread released all of them but stays in primary domain after a
> >> xenomai call.
> >>
> >> I'll setup a clean environment, just to be sure, and will investigate
> >> further tomorrow.
> >>
> >> On Mon, Oct 11, 2010 at 11:31 AM, Andreas Glatz <andi.glatz@domain.hid> wrote:
> >>>
> >>>>
> >>>> The auto-relax feature is now available from -head (upcoming
> >>>> 2.6.x). You
> >>>> will need all commits from
> >>>> http://git.xenomai.org/?p=xenomai-
> >>>> head.git;a=commit;h=b75cec19387e561f82ac55595db8c993b049f071
> >>>> to
> >>>> http://git.xenomai.org/?p=xenomai-
> >>>> head.git;a=commit;h=6653a9e8eb7339b749989bd74adc3ac3bd29e4da
> >>>>
> >>>> --
> >>>> Philippe.
> >>>>
> >>>>
> >>>
> >>> Very nice. Will try it out soon on my G4 PB Aluminium.
> >>>
> >>> Andreas
> >>>
> >>>
> >>> _______________________________________________
> >>> Xenomai-help mailing list
> >>> Xenomai-help@domain.hid
> >>> https://mail.gna.org/listinfo/xenomai-help
> >>>
> >>
> >

-- 
Philippe.