From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 02 Dec 2011 17:24:17 +0100
From: Uwe Fechner <u.fechner@domain.hid>
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Subject: Re: [Xenomai-help] Xenomai installation: high latencies
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To: Kurt Geebelen <kurt.geebelen@domain.hid>
Cc: xenomai@xenomai.org

Hi Kurt,

did you look at my website:
http://www.kieltech.de/uweswiki/Xenomai

I had to globally disable system management interrupts, to get the latenc=
ies down.

Regards:

Uwe

Am 02.12.2011 16:28, schrieb Kurt Geebelen:
> Dear all,
>
> I've tried installing Xenomai, following these instructions:
>
> http://www.xenomai.org/index.php/Building_Debian_packages
>
> but then for the latest version (xenomai 2.6.0, and kernel 2.6.38.8 and=
 for 64 bit) .
>
> For configuring the kernel, I followed these instructions:
>
> http://www.xenomai.org/index.php/Configuring_x86_kernels
>
> All that is stated on these websites works without problems, and I am a=
ble to boot in the=20
> installed xenomai kernel. However, when I perform the latency-test (lat=
ency in /usr/lib/xenomai),=20
> I get latencies of more than 1400 microseconds.
>
> The system I have is the following:
>
> Dell=99 Precision=99 T1500
> One=AE Intel=99 Core i7-860 (2.8GHz, 8MB L3, 95W, Quad Core)
> 6GB DDR3 non-ECC Memory (1333MHz, 3x2GB)
> 512MB PCIe x16 NVIDIA Quadro FX 580 Graphics Card
> Intel Solid-State Drive 320 Series 120GB
>
> I have tried reinstalling the kernel several times, but I always end up=
 with high latencies.
> I also have consulted with others, who followed the same guidelines as =
I did, and their latencies=20
> are about 100 times lower.
>
> Is there somebody who knows what the problem might be? Might it be a ha=
rdware-related problem?
>
> Many thanks in advance,
> Best regards,
> Kurt Geebelen
>
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