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

[Ryan Stone]

On Thu, May 31, 2012 at 8:48 AM, Ryan Stone <rysto32 at gmail.com> wrote:
> KTR_SCHED comes with a performance hit.  Besides, with the DTrace
> sched provider that I committed this month (and MFC'ed yesterday) you
> can collect schedgraph data with a D script.

I suppose it would have been helpful to provide a link to the script:
http://people.freebsd.org/~rstone/dtrace/schedgraph.d

Post-process it with this before feeding it to schedgraph.py:
http://people.freebsd.org/~rstone/dtrace/make_ktr