ULE/sched issues on stable/9 - why isn't preemption occuring?

[Andriy Gapon]

on 31/05/2012 15:48 Ryan Stone said the following:
> On Thu, May 31, 2012 at 8:33 AM, Andriy Gapon <avg at freebsd.org> wrote:
>> In this vein it might make sense to enable KTR and KTR_SCHED in GENERIC.
> 
> KTR_SCHED comes with a performance hit.

Yep, I realize that.  But I hope that it is not too huge for typical users of
GENERIC.  BTW, by "enable" I actually meant to compile it in, not really activate it.

> Besides, with the DTrace
> sched provider that I committed this month (and MFC'ed yesterday) you
> can collect schedgraph data with a D script.

Thank you for the reminder.  I am still to try it out.

-- 
Andriy Gapon