From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 20 Oct 2006 14:19:20 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Xenomai-help] Testsuite latency
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To: Frits de Klark <mailing.xenomai@domain.hid>
Cc: xenomai@xenomai.org

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Frits de Klark wrote:
> Hello everyone,
>=20
> as sort of a newbie to Xenomai (and realtime Linux in general) I'm the
> moment running the (unmodified) latency test included in the testsuite =
 in
> different situations:
>=20
> Situation A: Running as little daemons as possible in the background. T=
he
> chart I produced from the testdata, after running it for about 15 minut=
es,
> without doing anything else on the machine, shows very stable results, =
that
> is: there a no visible peaks downwards. Iin the case of MAX for example=
,
> the
> value is most of the time between 2.7 and 2.9, occasionly going straigh=
t up
> in the air, but NEVER below 2.7.
> WORST is 5.33, BEST is 0.40.
>=20
> Situation B: Running 1 'unneccesary' daemon, mysqld, but performing no
> database operations whatsoever. The chart I produced from this testdata=
 (it
> also ran for 15 minutes) is completely different and the line represent=
ing
> MAX is going up and down all the time, it looks VERY unsteady.
> In this case WORST is 16.52 and BEST is 1.11.

Check xenomai/TROUBLESHOOTING for appropriate load to test for the worst
case.

Jan


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