Re: [Xenomai-help] Re: Timer problems?

[Bernhard Walle <Bernhard.Walle@domain.hid>]

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Hi Steve,

* Steve Kreyer <steve.kreyer@domain.hid> [2006-08-26 23:23]:
> Bernhard Walle wrote:
> >
> >first of all: you replied to a previous mail which results in a broken
> >thread three in the mail client ... Pleaes create new mail for new
> >requests.
> >The example you've provided exits immediately here because you don't
> >wait in the main() function.
>
> Yes, Iam aware of this, but in fact the waiting via pause or sleep
> in the Linux process (main function) failed and results in a system
> lock up.

Ah, now I understand. :)

> >I modified your example to work:
> >http://pastie.caboo.se/10259
> [...]
> >No problem here, for example I call sleep(2) in the RT thread and it
> >work. 
> [...]
> >Calling Linux functions in RT code should work in Xenomai,
> >although it's not hard realtime safe any more because the thread gets
> >switched to the Linux scheduler.
>
> *The reason of my request was to figure out why any of the standard
> linux functions (e.g. pause, sleep,..., whether called from the
> linux or RT task) results in a system lock up and why the  functions
> rt_task_wait and rt_task_sleep, for example, produce the error
> behaviour described in the first mail.
> 
> So I think of an timer issue, or a wrong xenomai configuration or
> something like this, but can't really figure out the problem...

Well, this is something I also don't know. But I'm sure that Jan or
Philippe can help -- they're the experts here. :)

The only thing I could offer is my kernel .config which is attached.

> >Just for comparison:
> >I'm running Xenomai 2.1 with Kernel 2.6.15.7 on Debian 3.1.
>
> Iam running Xenomai version 2.2 and Kernel 2.6.15 on a kanotix system.

Maybe try 2.1 with my kernel configuration to figure out if it's a
strange hardware "bug" or something in the configuration or a bad
combination of kernel/patch/Xenomai.

I had some similar problem with RTAI, but less problematic, the system
was only frozen when issuing a rt_printk() from LXRT (userspace). The
solution was to update the kernel.

I use a 500 MHz P III, don't know how old, it's from my employer. :)


Regards,
  Bernhard
-- 
Die Freiheit des Menschen liegt nicht darin, dass er tun kann, was er will, 
sondern dass er nicht tun muss, was er nicht will.
	-- Jean-Jacques Rousseau

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