Hi, I try to really understand the Xenomai design & behavior and have a few technical questions for which I can't find exact answers on documentations or mailing list :
- What is the overhead of the Adeos/I-Pipe layer on non RT Linux tasks (including linux kernel) ? This surely depends on interrupts number, but perhaps some results on a particular platform exist. - When using RTnet, I understand that non RT Linux tasks uses a virtual network device linked to the RTnet one, so what performance impact does this have on non RT network bandwidth ? I saw on some introduction slides that an arinc 653 skin would be possible. Emulating the arinc 653 is certainly possible, but if a real arinc 653 system is considered, this raises a few technical issues. - Is the nucleus memory space protected from the Linux kernel (at least in primary mode) ? If not, would this be possible ? - It seems from what I understand that nucleus implements threads, but not processes (like others RTOS), does this mean that they all share the same memory space ? - Can the nucleus kernel still run if the Linux kernel crashes (which happens in ring 1 mode on x86 if I'm correct) ? - Or more generally, what Linux kernel services are used by nucleus (it seems at least the memory allocation ones) ? - This is linked to the previous questions, but if we wanted to remove everything from the Linux kernel that is not used by Xenomai, what would be necessary to keep ? - At last, is there a way to guaranty a worst case latency on Xenomai (even a high one) supposing we know every hardware behavior (hum...) ? I'm sorry if these questions are stupid or have been answered previously, guiding me to the references would certainly greatly help me in this case. Best regards, rémi _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
