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

[Chen Yu]

Hi Josh,
On 2022-12-06 at 18:23:47 -0800, Josh Don wrote:
> > 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?
OK, I'll measure the duration of all the tests and summarize the data later.

thanks,
Chenyu