Messages in this thread | | | From | Vincent Guittot <> | Date | Thu, 23 Sep 2021 14:41:06 +0200 | Subject | Re: [PATCH 2/2] sched/fair: Scale wakeup granularity relative to nr_running |
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On Thu, 23 Sept 2021 at 11:22, Mike Galbraith <efault@gmx.de> wrote: > > On Thu, 2021-09-23 at 10:40 +0200, Vincent Guittot wrote: > > > > a 100us value should even be enough to fix Mel's problem without > > impacting common wakeup preemption cases. > > It'd be nice if it turn out to be something that simple, but color me > skeptical. I've tried various preemption throttling schemes, and while
Let's see what the results will show. I tend to agree that this will not be enough to cover all use cases and I don't see any other way to cover all cases than getting some inputs from the threads about their latency fairness which bring us back to some kind of latency niceness value
> it was trivial to get promising results, my scheme always managed to > harm something. Everything I ever tried, I ended up tossing. > > -Mike
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