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SCHED_FIFO and realtime throttlingSCHED_FIFO and realtime throttlingPosted Sep 2, 2008 0:13 UTC (Tue) by jengelh (subscriber, #33263)Parent article: SCHED_FIFO and realtime throttling
Would interested parties please use SCHED_RR if they intend to give the processor back...
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SCHED_RR doesn't limit CPU usage Posted Sep 2, 2008 6:42 UTC (Tue) by simlo (subscriber, #10866) [Link]
SCHED_RR is Round Robin _within_ the same priority. If there is no equal
priority task a SCHED_RR task is the same as a SCHED_FIFO task.
SCHED_RR doesn't limit CPU usage Posted Sep 3, 2008 5:48 UTC (Wed) by jzbiciak (✭ supporter ✭, #5246) [Link]
Are you saying SCHED_RR tasks don't get preempted at the end of their time quanta even if there's no other task ready at its level?
I guess it's only a minor point. I don't know if there are other housekeeping tasks the kernel can quickly dispatch of (CPU load balancing, for instance) if it periodically reschedules a SCHED_RR task, even if that prio level has only one task. Clearly, a running SCHED_RR task is the highest priority thing the CPU can and should run at that point.
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