Re: [Xenomai-help] Sporadic PC freeze after rt_task_start

["M. Koehrer" <mathias_koehrer@domain.hid>]

Hi Jan,

I left my PC running the whole weekend using the kernel command line parameter "nmi_watchdog=1".
However, using this option, the PC did not freeze at all...
This is really ugly.
The kernel configuration was the same I mailed a couple of days ago.

Also, I tried (a couple of hours) to run with Xeno debugging (Nucleus debugging and Watchdog support) enabled. However, this did not lead to a freeze either.

This seems to be a really nasty timing issue...

Any ideas on how to continue are welcome.

Regards

Mathias

> > I did another test to identify the freeze. I have plugged in a POST-CODE
> 80 PCI board into the PC
> > and instrumented the code to write to port 80 to find out where the freeze
> actually happens.
> > It seems not to return for rt_task_start as the last written POST code
> (see source code below)  is 0x30.
> > I hope to find a time slot to modify the kernel to do another test.
> 
> Again: Please consider NMI watchdog and nucleus debugging support for
> those tests as well. Maybe (I dare to say: likely on SMP) they catch
> where the CPUs hang around instead of doing their work.
> 
> > The bad thing is that it takes really long to get the freeze (up to a
> couple of hours).
> 
> Your effort is appreciated even more!
> 
> Jan
> 
> 


-- 
Mathias Koehrer
mathias_koehrer@domain.hid


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