> > Hi, > > Der Herr Hofrat writes: > > > > HI ! > > > > reading my wai into adeos - so pleas excuse if these question are stupid.. > > after reading the docs on adeos.org and a few comments in the > > RTAI mailng list a few questions arose: > > > > 1) Is ther and example of running multiple domains under adeos > > You can find a trivial code which loads a domain module intercepting > the timer IRQ here: > http://savannah.nongnu.org/cgi-bin/viewcvs/adeos/adeos/platforms/linux/examples/simple/. > > For a more complex implementation, there's something in RTAI's ongoing > magma development branch called the "Xenomai skins" which runs three > concurrent domains: > > o the RTAI domain (priority=200) > o the Xenomai domain (priority=150) > o the (root) Linux domain (priority=100) > > RTAI runs real-time tasks with memory protection created by RTOS > emulators mounted by Xenomai, and the Xenomai domain shields > interrupts from the Linux domain when needed to guarantee determinism. > IOW, the event flow goes this way: > [IRQ/traps] ==> RTAI -> Xenomai -> Linux, each of them being able to > decide whether the next domain down the pipeline should be passed the > event or not. >
anything on the web about this ?? > > (exept for RTAI which is not completly independant (?) of the root domain > - atleast it does not seem posible to run multiple instances of RTAI in > paralell ? > > In fact, it is indeed logically independent once the root domain has > loaded the RTAI one. One could take the Adeos-based HAL, only change > its domain priority and load it as-is, concurrently to the original > RTAI domain for running kernel-based tasks. Have a look to > arch/i386/arti.c from the RTAI "etna" or stromboli" branches, or > rtai-core/arch/i386/hal/arti.c from the "magma" branch. > > > Has anybody ran multiple Linux or other OS'under ADEOS > > and are there any docs about this ?? > > > > 2) for shared resources - Network cards etc. - the > > Root domain driver is responsible (or a root-domain-process) for > > dispatching the domain specific data (i.e. a ip-packet for a > > specific domain)a > > > > Running multiple concurrent Linux instances using Adeos on a single > box would indeed require to decide about which instance/domain > controls which set of hardware resources and system software, and use > some kind of virtual relay to honor inter-domain requests. But as of > now, there has not been much work on this application of the Adeos > scheme (none that I know of to be precise). > thanks for the clarification - I'll try to play with this to find out what I don't understand again ;) thx ! hofrat ps.: Any presentations on such issues planed/intended fro the 5th Real Time Linux Workshop ??
