M. Koehrer wrote: > Hi all, > > I want to run Xenomai and rtnet (using RTDM) on a dual core CPU. > Using the kernel parameter isolcpus I can force the standard Linux tasks > to run on one of the cores. > The other core should be used exclusively by all real time tasks (including > rtnet). > I can - of course - pass a parameter on each rt_task_create() call. > However how can I force rtnet (using RTDM) to run on this CPU core?
You hit a weak point, see the Task Market in the wiki: "CPU affinity for RTDM threads." We both need an API for RTDM and its application on RTnet. Not complex work, just work... > Is there a possibility to mask the CPUs to be used globally? > This could also avoid to pass the CPU number with each rt_task_create() call. Well, that would actually be an additional way. Yeah, maybe some global CPU mask that controls the affinity on future thread creation. We could export it via /proc so that you can set it right before starting a specific group of applications and drivers. On the long term, a control interface to the Xenomai scheduler would be good so that things like policy, priority, time-slice, or CPU affinity could be manipulated with some command line tool or via /proc after thread creation. Further feedback welcome! Jan
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