Hi everybody, I am currently evaluating the latest Xenomai release 2.4.0 on a Dual Core Pentium 4 using the 2.6.23 kernel and also the latest rtnet 0.9.10-rc1. I have one question concerning the relation of the /proc/xenomai/affinity entry and the parameter T_CPU(n) I pass with rt_task_create (native API). If I set /proc/xenomai/affinity to 1 (which means to run all real time tasks on CPU 0). I am not allowed to pass T_CPU(1) with rt_task_create. rt_task_start returns with a -EINVAL.
Background for my question is: rtnet uses a internal system task For this task I cannot pass the CPU I want to run this CPU on. My idea is now to set /proc/xenomai/affinity to 1 which means (in my mind) that all tasks that do not have specified explicitly a task number (T_CPU(n)) will run on the CPU(s) specified by /proc/xenomai/affinity. All those tasks that specify T_CPU explicitly will run on the specified CPU, no matter what value /proc/xenomai/affinity is. However, this seems not to work. I want to run rtnet on CPU 0 and my own code on CPU 1. For this I write 1 to /proc/xenomai/affinity and pass T_CPU(1) with all my calls to rt_task_create. However, these tasks return with -EINVAL. I debugged into Xenomai and found out that is caused in xnpod_start_thread() at the condition if (xnarch_cpus_empty(thread->affinity)) ... When I write 3 to /proc/xenomai/affinity my tasks start fine, however I have now no control of the CPU placement of the rtnet system task. Any hints on that are highly welcome. Regards Mathias -- Mathias Koehrer [EMAIL PROTECTED] Viel oder wenig? Schnell oder langsam? Unbegrenzt surfen + telefonieren ohne Zeit- und Volumenbegrenzung? DAS TOP ANGEBOT FÜR ALLE NEUEINSTEIGER Jetzt bei Arcor: günstig und schnell mit DSL - das All-Inclusive-Paket für clevere Doppel-Sparer, nur 29,95 Euro inkl. DSL- und ISDN-Grundgebühr! http://www.arcor.de/rd/emf-dsl-2 ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
