[Xenomai-help] Aw: Re: A fairly small rtnet/Xenomai application that freezes the PC

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

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Hi Jan,

enclosed is the ethereal dump file.
Unfortunately I do not have a slow machine... (We try to get the fastest machines running...).

Thanks for checking the application.

Mathias
> > after a long debug-reboot-try-again-session I was able to reduce the
> problem I had
> > to a very short application that leads to a complete system freeze on a
> 2.6.19.1 kernel.
> > As with my PC I am not able to run the NMI stuff within Xenomai, I forward
> the application to you
> > and the list. Perhaps somebody can try out the enclosed application with
> the latest Xenomai version
> > on 2.6.19.1.
> 
> Thanks for the test case, I will give this a try ASAP.
> 
> > Please adjust the IP settings in the C file and in the xenorun script to
> your setup.
> > It is sufficient to send out UDP frames, if the remote device does not
> answer this does not hurt.
> > However the remote device should listen on a specified port to avoid ICMP
> complains about
> > no-opened UDP ports...
> > Using Ethereal I monitored the traffic.
> > Here is the summary of it:
> > ARP request/response (from the xenorun script)
> > ARP request/response (from the applicaion)
> > UDP message to port 18765 (no answer)
> > 2 seconds later: UDP message to port 18765 (no answer)
> > 2+5=7 seconds later: ARP request/response (from the application)
> > 2 seconds later: UDP message to port 18765
> > Here the system freezes. I do not see the message "Step A".
> 
> Could you set me the Ethereal dump for reference? Just in case the test
> does not kick immediately for me and I need to check the event flow.
> 
> > 
> > One important piece is the system() call out of the realtime application
> to do a rtroute.
> > When I remove this call, there is no error...
> > 
> > 
> > I am using Xenomai SVN #1969 and the included 2.6.19.1 patch. Pentium 4
> UP.
> 
> Do you have a different (slower) execution platform at hand to check if
> the CPU speed as influence on the lock-up? I hope it is not the case -
> makes tracking easier. But it wouldn't be the first time.
> 
> > 
> > Any feedback on this is highly welcome!
> > 
> 
> You will get it.
> 
> Thanks again,
> Jan
> 
> 

-- 
Mathias Koehrer
mathias_koehrer@domain.hid


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