Messages in this thread | | | Date | Tue, 19 Jan 1999 20:43:12 +0100 (CET) | From | MOLNAR Ingo <> | Subject | Re: Scheduler problems |
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On Tue, 19 Jan 1999, Stephen C. Tweedie wrote:
> What it will _not_ do is to preempt a process already running on that > other CPU. From reschedule_idle(): > > * [We can try to preempt low-priority processes on other CPUs in > * 2.3. Also we can try to use the avg_slice value to predict > * 'likely reschedule' events even on other CPUs.] > > Ingo, any thoughts? Seems that if for any reason all wakeup interrupts > arrive at the same CPU which is running the SCHED_FIFO task, then we > will _never_ perform any successful wakeups without first exhausting the > other CPU's current timeslice.
yes i have a patch for this but it's not straightforward enough for 2.2. (ie. a 50k patch) It has to do things like a full goodness() run for every CPU in wakeup(), which is less than ideal.
-- mingo
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