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Date: Thu, 07 Jun 2007 11:25:06 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] Cyclictest
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To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

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