On Tue, 2006-10-31 at 18:34 +0100, Jan Kiszka wrote: > Jean-Olivier Villemure wrote: > > > > The next step will be to generate some statistics, for this step I will > > need your help. As Xenomai users, which kind of stats would you want to > > compute? > > - CPU usage (see /proc/xenomai/stat for average numbers, but we should > now be able to precisely calculate them for a specific period) > - Waiting times after activation (maybe one can define deadlines later > and verify them) > - Number of preemptions per second or whatever while a task is runnable > - Number of blockades a task faces due to unavailable resources > (mutexes, semaphores, etc.)
- Average number of elements linked to the readyq per second (some kind of loadavg for us, i.e. answers the question "should the user switch to the scalable scheduler?") - Average number of outstanding timers per second (i.e. answers the question "should the user switch to the binary heap-based timer management?"). - Total number of timers missing their wakeup date from more than a given threshold. - Pressure on the system heap (average and max, probably). - Transfer rate on message pipes (i.e. nucleus/pipe.c); at some point, it would be interesting to extend this to skins exposing data channels (e.g. native API's queues, POSIX mqueues). -- Philippe. _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
