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Date: Fri, 22 Jun 2007 17:47:36 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-core] [Adeos-main] New I-pipe patch for ARM
	needs	testing.
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To: BOUIN Alexandre <abouin@domain.hid>
Cc: adeos-main@gna.org, xenomai@xenomai.org

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BOUIN Alexandre wrote:
> Same tests but for AT91SAM9263-EK board :=20
>  - one under DD load, latency set to 45=B5s
>  - another one under Calibrator load, latency set to 30=B5s
>  - and the last under Test_switch load, latency set to 45=B5s
> Xeno-test traces are available and the end of this mail.
>=20
> We used kernel 2.6.20.13, Xenomai snapshot from 08/06/2007, adeos-ipipe=
-2.6.20-arm-1.7-03.patch included plus 2.6.20-at91.patch.
>=20
> A little correction on macb and ipipe patch was needed :=20
>  - macb ethernet controler is not detected on startup
>  - we added some corrections to make 9263 usable under ipipe
>  - owing to changes in at91 patch (clk are now registered on startup) w=
e made a little correction for future adeos-ipipe-2.6.21-arm.patch.
>=20
> You will find all added patches attached to this mail.
>  <<adeos-ipipe-2.6.20-arm-AT91.patch>>  <<2.6.20-at91-macb-9263.patch>>=
  <<adeos-ipipe-2.6.20-arm-AT91.patch>>=20
> Latencies are a little worst than on other boards. We presume that it's=
 due to the large number of peripherals.

<pure theory without looking at details here>
Every additional IRQ source can cause additional delays of your
benchmarked event. All those IRQs may once in a while line up just in
front of your RT-IRQ, delaying it yet a bit more.
</end of theory>

Jan


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