Re: [PATCH v3 1/2] sched/fair: Introduce short duration task check

[Josh Don]

> We don't want to add more dedicated knobs. So using
> sysctl_sched_min_granularity as you are doing in this patch looks ok

If not a knob, then maybe at least a smaller hardcoded value? Several
milliseconds seems like too long for this optimization; the
opportunity cost of not doing the idle search likely doesn't make
sense if the waker is going to be active for several additional
milliseconds. I would have guessed something on the order of 100us.

Chen, what is the run duration of tasks in your ping pong example?