From: Jan Kiszka <jan.kiszka@domain.hid>
To: "M. Koehrer" <mathias_koehrer@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Sporadic PC freeze after rt_task_start
Date: Wed, 11 Jul 2007 09:32:55 +0200 [thread overview]
Message-ID: <469487A7.8030204@domain.hid> (raw)
In-Reply-To: <12423528.1184136237522.JavaMail.ngmail@domain.hid>
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M. Koehrer wrote:
> Hi Jan,
>
> as I mentioned in my first mail on this topic, I have extracted this example from a huge
> real time application where the system sporadically freezes.
> What I have found out there was, that the system freeze happened always when trying
> to start a thread (in the original application, the tasks run fairly long).
OK, so it's one of rt_task_create (unlikely), rt_task_start, usleep, or
some early code in the task function itself. Still, a lot of "or"...
Again, please consider my further debugging suggestions.
> I think it has to do with rt_task_start() followed by usleep() and the non-realtime stuff running
> on CPU 0 and the realtime stuff running on CPU 1.
> I never saw that issue on a single core CPU (even if the same SMP kernel was used).
Yeah, it must be a nice race that requires real parallelism.
Jan
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next prev parent reply other threads:[~2007-07-11 7:32 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-10 8:00 [Xenomai-help] Sporadic PC freeze after rt_task_start M. Koehrer
2007-07-10 8:40 ` Jan Kiszka
2007-07-10 12:29 ` M. Koehrer
2007-07-10 12:41 ` Jan Kiszka
2007-07-10 14:40 ` M. Koehrer
2007-07-10 15:34 ` Jan Kiszka
2007-07-11 6:43 ` M. Koehrer
2007-07-11 7:32 ` Jan Kiszka [this message]
2007-07-11 12:45 ` M. Koehrer
2007-07-11 14:47 ` Jan Kiszka
2007-07-13 7:27 ` M. Koehrer
2007-07-13 8:26 ` Jan Kiszka
2007-07-16 7:07 ` M. Koehrer
2007-07-16 22:42 ` Jan Kiszka
2007-07-19 10:58 ` M. Koehrer
2007-07-19 11:27 ` Jan Kiszka
2007-07-19 12:19 ` Philippe Gerum
2007-07-19 12:40 ` Jan Kiszka
2007-07-19 13:55 ` [Xenomai-core] " Philippe Gerum
2007-07-19 15:14 ` Philippe Gerum
2007-07-19 15:35 ` Jan Kiszka
2007-07-19 16:03 ` Philippe Gerum
2007-07-19 17:18 ` Jan Kiszka
2007-07-19 18:24 ` Philippe Gerum
2007-07-19 20:15 ` Jan Kiszka
2007-07-19 21:35 ` Philippe Gerum
2007-07-20 14:20 ` Jan Kiszka
2007-07-20 18:33 ` Philippe Gerum
2007-07-21 8:49 ` Philippe Gerum
2007-07-22 16:44 ` Jan Kiszka
2007-07-19 17:57 ` Jan Kiszka
2007-07-21 20:15 ` Philippe Gerum
2007-07-20 7:03 ` M. Koehrer
-- strict thread matches above, loose matches on Subject: below --
2007-07-19 13:27 M. Koehrer
2007-07-19 13:42 ` Philippe Gerum
2007-07-19 13:52 ` M. Koehrer
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