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From: Jan Kiszka <jan.kiszka@domain.hid>
To: "Ignacio García Pérez" <iggarpe@domain.hid>
Cc: xenomai-core <xenomai@xenomai.org>
Subject: Re: [Xenomai-core] rt_task_wait_period returning -ETIMEDOUT
Date: Tue, 06 Jun 2006 12:47:31 +0200	[thread overview]
Message-ID: <44855D43.60806@domain.hid> (raw)
In-Reply-To: <44855B98.6070406@domain.hid>

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Ignacio García Pérez wrote:
> Hi,
> 
> rt_task_wait_period() is spuriously returning -ETIMEDOUT.
> 
> (spuriously = maybe once every two hours with period = 500us)
> 
> I'm using the trunk code and that error code is not mentioned in the
> rt_task_wait_period documentation.
> 
> Any clues?

testsuite/latency makes use of rt_task_wait_period as well. Already
tried to run it at the same frequency? Does it fail as well?

Further question: Does this error correlate with some real deadline miss
of your application?

SMI&friends might be a reason here, check delays of the testsuite (and
your kernel config, of course). Is the workaround enabled? Is it
reported to be used (kernel log)?

Jan


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      reply	other threads:[~2006-06-06 10:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-06-06 10:40 [Xenomai-core] rt_task_wait_period returning -ETIMEDOUT Ignacio García Pérez
2006-06-06 10:47 ` Jan Kiszka [this message]

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