From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>
Subject: Re: [Xenomai-help] Cyclictest
Date: Thu, 07 Jun 2007 11:25:06 +0200 [thread overview]
Message-ID: <4667CEF2.2050509@domain.hid> (raw)
In-Reply-To: <4667BBBE.1040405@domain.hid>
Jan Kiszka wrote:
> Perrine Martignoni wrote:
>
>>Ok. I'll do this.
>>
>>But I don't understand why the same application compiled without any links
>>with Xenomai give different results if there is Xenomai in the kernel.
>
>
> [Looking at your numbers again] Hmm, maybe some rounding issue of ticks
> due to whatever side-effect of I-pipe. We would first of all need the
> usual set of information (.config, involved versions) and also
> /sys/devices/system/clocksource/clocksource0/current_clocksource.
Maybe what Perrine is observing is simply the overhead of the I-pipe ?
I mean, Linux is Xenomai idle task, so it is acceptable for Linux
numbers to be a bit worse than when Xenomai is not running.
--
Gilles Chanteperdrix
next prev parent reply other threads:[~2007-06-07 9:25 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-06 15:01 [Xenomai-help] Cyclictest Perrine Martignoni
2007-06-06 15:04 ` Daniel Schnell
2007-06-06 15:18 ` Philippe Gerum
2007-06-07 5:54 ` Perrine Martignoni
2007-06-07 6:48 ` Jan Kiszka
2007-06-07 7:42 ` Perrine Martignoni
2007-06-07 8:03 ` Jan Kiszka
2007-06-07 9:25 ` Gilles Chanteperdrix [this message]
2007-06-07 9:29 ` Jan Kiszka
2007-06-07 9:35 ` Gilles Chanteperdrix
2007-06-07 9:41 ` Jan Kiszka
2007-06-07 10:12 ` Gilles Chanteperdrix
2007-06-07 10:07 ` Philippe Gerum
2007-06-07 10:17 ` Philippe Gerum
2007-06-07 12:09 ` Perrine Martignoni
2007-06-07 12:20 ` Gilles Chanteperdrix
2007-06-07 12:28 ` Perrine Martignoni
2007-06-07 12:32 ` Gilles Chanteperdrix
2007-06-07 13:49 ` Perrine Martignoni
2007-06-07 13:58 ` Gilles Chanteperdrix
2007-06-07 14:36 ` Gilles Chanteperdrix
2007-06-06 15:11 ` Jan Kiszka
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