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From: "M. Koehrer" <mathias_koehrer@domain.hid>
To: xenomai@xenomai.org
Subject: [Xenomai-help] Results of xenomai's latency test vs. RTAI's latency test
Date: Mon, 30 Oct 2006 11:05:47 +0100 (CET)	[thread overview]
Message-ID: <21364954.1162202747823.JavaMail.ngmail@domain.hid> (raw)

Hi everybody,

I am currently checking XENOMAI (V2.2.3 on a 2.6.17.7 kernel P4) to see if I can use it
as replacement for a RTAI 3.3-cv application.
The first thing I did was to run the latency test in the the xenomai's testsuite directory.
The results of the worst time latency are really ugly - about 40µs!
On the very same PC I got a value of about 5µs using RTAI 3.3-cv running the RTAI's
user/latency test.

My question is now: Why can there be such a huge difference between the two systems on the very same
hardware??
Is there a way to improve this value?

The RTAI system uses a 2.4.33 kernel, the XENOMAI uses the 2.6.17.7 kernel. Could this
be an issue?

Thanks for any feedback on that issue!

Mathias


-- 
Mathias Koehrer
mathias_koehrer@domain.hid


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             reply	other threads:[~2006-10-30 10:05 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-30 10:05 M. Koehrer [this message]
2006-10-30 10:22 ` [Xenomai-help] Results of xenomai's latency test vs. RTAI's latency test Jan Kiszka
2006-10-30 11:05   ` Re: [Xenomai-help] Results of xenomai's latency test vs. RTAI's latency M. Koehrer
2006-10-30 11:39     ` Jan Kiszka
2006-10-30 11:37 ` [Xenomai-help] Results of xenomai's latency test vs. RTAI's latency test Philippe Gerum
2006-10-30 14:15   ` Re: [Xenomai-help] Results of xenomai's latency test vs. RTAI's M. Koehrer
2006-10-30 14:40     ` Philippe Gerum
2006-10-30 15:34       ` M. Koehrer
2006-10-30 16:23         ` Jan Kiszka
2006-10-30 16:24         ` Gilles Chanteperdrix
2006-10-30 17:44         ` Philippe Gerum
2006-10-30 16:39     ` Jan Kiszka

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