Re: [PATCH 5/7] sched_ext: Add an event, SCX_EVENT_RQ_BYPASSING_OPS

[Changwoo Min]

Hello,

On 25. 1. 17. 10:41, Tejun Heo wrote:
> > +
> > +	/*
> > +	 * When the bypassing mode is set, the number of bypassed operations.
> > +	 */
> > +	u64		RQ_BYPASSING_OPS;
> >   };
>
> I'm not sure this is a particularly good way to account for bypass mode.
> Maybe account the total duration of bypass modes,the number of times it was
> activated and the number of times tasks were dispatched in bypass mode?
I think it is a good idea to further specialize RQ_BYPASSING events.

For the number of times the bypassing mode activated, what about
BYPASS_NR_ACTIVATED?

For the number of task dispatched,what about
BYPASS_NR_TASK_DISPATCHED?

I think BYPASS_NR_ACTIVATED and BYPASS_NR_TASK_DISPATCHED will be
a good proxy for the total duration, so we can skip it until we
have a clear user case. If we need the total duration now (maybe
BYPASS_DURATION?), we can directly measure it in the
scx_ops_bypass() directly. What do you think?

Regards,
Changwoo Min