From: Jan Kiszka <jan.kiszka@domain.hid>
To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai-core <xenomai@xenomai.org>
Subject: Re: [Xenomai-core] [RFC] Fix excessive host tick latencies
Date: Fri, 30 Apr 2010 16:34:23 +0200 [thread overview]
Message-ID: <4BDAEA6F.4070705@domain.hid> (raw)
In-Reply-To: <4BDAE961.4060203@domain.hid>
Gilles Chanteperdrix wrote:
> Jan Kiszka wrote:
>> Hi Philippe,
>>
>> I'm not 100% sure if this plugs all remaining wholes in the deferred
>> host tick processing, but at least the most easiest reproducible one is
>> cured now for me (Linux latency peak after termination of 'latency').
>> Please let me know if you see more potential issues, otherwise I would
>> include this in my for-upstream queue.
>>
>> Found while instrumenting the timer core to find RT timer latencies.
>> Hope they become visible now...
>
> Note that the behaviour of xnpod_schedule may have changed since the fix
> of the XENO_OPT_DEBUG_NUCLEUS issue. Notably, some calls to
> xnpod_schedule should now be skipped if nucleus debug is turned off.
>
> Are you running the tests with or without nucleus debug?
>
Without CONFIG_XENO_OPT_DEBUG_NUCLEUS and with the debug fix applied.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2010-04-30 14:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-30 13:33 [Xenomai-core] [RFC] Fix excessive host tick latencies Jan Kiszka
2010-04-30 14:29 ` Gilles Chanteperdrix
2010-04-30 14:34 ` Jan Kiszka [this message]
2010-04-30 20:13 ` Philippe Gerum
2010-04-30 21:01 ` Gilles Chanteperdrix
2010-05-01 8:24 ` Philippe Gerum
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