On 09/14/2011 02:18 PM, Henri Roosen wrote:
> We'll start experiments running our Xenomai application on a
> multi-core CPU (x86/ARM). I'm sure there are some Xenomai users who
> already have experience with it.
>
> What I would like to do is to run the Xenomai realtime threads on one
> core of the multi-core CPU. And I would like to reserve this core only
> for the Xenomai realtime threads.
>
> I'm using the Native API, so I can pass the CPU affinity flags for the
> Xenomai threads during task creation/shadow. But how can I make sure
> other threads will not make use of the same processor? I cannot call
> taskset for every task that is spawned... right?
>
> Are there any idea's on how this configuration could be made easier?
> It would be nice if there was a kernel config option to reserve
> core(s) for Xenomai that Linux will not use.
>
> Any ideas and help are welcome!
The kernel has an "isolcpus" option, which allows to specify which cpus
should not be used by Linux.
See Documentation/kernel-parameters.txt in the linux kernel sources for
an explanation.
--
Gilles.
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