From: Jan Kiszka <jan.kiszka@domain.hid>
To: "M. Koehrer" <mathias_koehrer@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] RT Application on isolated core
Date: Wed, 04 Jun 2008 23:57:27 +0200 [thread overview]
Message-ID: <48470FC7.9090706@domain.hid> (raw)
In-Reply-To: <14864600.1212570529651.JavaMail.ngmail@domain.hid>
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M. Koehrer wrote:
> Hi!
>
> I am doing some experiments on a Core2Duo CPU and I have some question on it.
> My setup is the following:
> I have Xenomai 2.3.3 and kernel 2.6.20.4, SMP enabled.
> I start the kernel with the option isolcpus=1 which works as all linux tasks run on
> CPU 0 (i.e. core 0).
> Now, I start a very small Xenomai (native skin) application with on real time task
> on CPU 1 (core 1).
> This application realizes an endless loop that does some dummy math operations
> (to burn CPU power...).
Won't work as there is no such thing as perfect CPU isolation with
Linux, at least so far. Please see related discussion and patches on LKML.
There is currently a thread running regarding the removal of isolcpus -
cpusets are supposed to be used now. But more needs to be done, I'm just
lacking references to the postings (somewhere in February). Google
should help.
Jan
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prev parent reply other threads:[~2008-06-04 21:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-04 9:08 [Xenomai-help] RT Application on isolated core M. Koehrer
2008-06-04 21:57 ` Jan Kiszka [this message]
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