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

[Jan Kiszka <jan.kiszka@domain.hid>]

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M. Koehrer wrote:
> Hi Jan,
> 
> meanwhile I have done a couple of additional tests.
> With one of the PCs I have, I have disabled the Memory Cache to slow it down.
> The effect was the very same. 
> I have reproduced the behaviour on another PC (also P4, but different mainboard).
> The system freezes as well.
> And finally, I have found out that printing out a line with printf() directly after the system() call provides
> a workaround.Then the system is stable.
> 
> I have replaced the system() call where I called rtroute with a simple call to "ls -l" (i.e system("ls -l") ).
> Then the system freezes as well.
> It looks to me as if a system() call out of the realtime task is not properly handled.
> An printf() after the system() call seems to move the system back on track...
> 
> Hope that helps a little bit to identify the issue...

Unfortunately not yet. I tried with exactly the same configuration you
once mailed on a Pentium M 1.3 GHz - but all worked fine. The obvious
differences are the CPU speed (I may have access to a crash box with
more GHz next week) and the NIC (rt_eepro100 in my case).

As my hope of being able to reproduce it on my own is not that high, I
would like to ask you to try nailing down the lock-up on kernel level.
That means trying to identify (via printk e.g. - if this doesn't make
the bug jump around) which function is still executed and where we do
not get.

TIA,
Jan


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