From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: GSM909@domain.hid
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Time between ISR and RT Task
Date: Thu, 3 Aug 2006 19:36:46 +0200 [thread overview]
Message-ID: <17618.13358.419819.265967@domain.hid> (raw)
In-Reply-To: <20060803133516.31820@domain.hid>
GSM909@domain.hid wrote:
> Hello
>
> I have run a few programs with Xenomai tasks and have no problems. But I notice that the time between ISR and RT task ( RT task is suspended and resumed by the ISR) is shorter when Linux have a lot of work ( average load around 10 ) as when Linux has nothing to do( al : 0.05 ).
Do you observe this for worst case, or for average case latencies? Do
you observe this when you boot with the idle=poll parameter ?
When idle, Linux uses the 'hlt' instruction, that stops the CPU until an
interrupt happen, maybe waking up from this state take a little bit more
time than when an interrupt is received directly?
--
Gilles Chanteperdrix.
next prev parent reply other threads:[~2006-08-03 17:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-03 13:35 [Xenomai-help] Time between ISR and RT Task GSM909
2006-08-03 17:36 ` Gilles Chanteperdrix [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-08-04 7:08 GSM909
2006-08-04 13:27 ` Gilles Chanteperdrix
2006-08-04 18:52 ` newsletter
2006-08-12 19:35 ` Gilles Chanteperdrix
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