Re: [Xenomai-help] hard lock-up

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

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andy motten wrote:
> 2007/8/10, Klaas Gadeyne <klaas.gadeyne@domain.hid>:
>> On Fri, 10 Aug 2007, Jan Kiszka wrote:
>>> Philippe Gerum wrote:
>>>>> The linux kernel used now is 2.6.20.9 with ipipe patch 1.8-08.
>>>>> We use branch 2.3.x of Xenomai (Last changed Revision 2898)
>>>>>
>>>>> While running xeno-test, the system locks-up just after the latency
>>>>> test.
>>>> Confirmed here. Houston, we do have a problem with the switchtest, or
>>>> soimething this test triggers (and not necessarily the FPU mgmt)...
>>> Any news on this? Does it already happen by just running switchtest
>>> stand-alone (it doesn't do so here at least)? Is this a pure 2.3.x
>>> issue, or is it also visible for 2.4? /me currently rebuilds some trees
>>> to assess the local situation.
>> Andy will probably continue testing today, so more info will follow, but
>> (see
>> <https://mail.gna.org/public/xenomai-help/2007-08/msg00044.html>) at
>> first sight we encountered similar issues on trunk (2.2.x seems
>> unaffected).
>>
>> Klaas
> 
> 
> We have disabled NMI watchdog like Gilles Chanteperdrix suggested in his
> previous message.
> 
> For the moment We have no hard locks anymore. The linux kernel used is still
> 2.6.20.9 with ipipe patch 1.8-08.
> We use branch 2.3.x of Xenomai (Last changed Revision 2898). The only thing
> We have changed is turning off the "NMI watchdog".
> 
> There is no obvious reason why this happened (according to us), but it may
> have something to do with the AGP bus (we turned it OFF in this kernel, it
> was already turned OFF in the previous tests, but it was ON in the first
> tests).

Yet another broken x86 system...?

> 
> For seeing if this system will not hard lock anymore, the system will stay
> on this weekend (continuously running xeno-tests with high loads). We will
> inform you of the results after the weekend.

BTW, given that the SMI workaround is infunctional on your system: Do
you get reasonable latencies ATM? It looked to me like the NMI watchdog
might have triggered due to SMI-related delays.

[/me still wonders what Philippe found...]

Jan


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