Le jeudi 01 août 2019 à 13:25 +0200, Jan Kiszka a écrit : > On 01.08.19 11:53, Julien Blanc via Xenomai wrote: > > Hi, > > > > Let’s say i have four threads : > > * thread 1, RT, with SCHED_FIFO policy and a sched_param value of > > 90 > > * thread 2, RT, with SCHED_WEAK policy and a sched_param value of 0 > > * thread 3, RT, with SCHED_WEAK policy and a sched_param value of 0 > > Should 2 and 3 have the same parameters in your scenario?
That is not necessary. But our kernel currently lacks OPT_SCHED_WEAK, so i need to consider whether we need to rebuild and deploy a new one or not (i’d like to avoid it for now). > You can assign non-zero prios to thread 2 and 3, ordering it this > way, but then also while both are in primary mode. For "weak" > ordering, you could also leave their prio at 0 and play with their > nice level. That would be a Linux-only "prio". I’ll give that a try. Thanks and thanks to Philippe for your detailed answers, this is much clearer now. Regards, Julien
