Re: ULE/SCHED_SMP diff for 7.0

On Mon, 16 Jul 2007 23:35:38 -0700 (PDT)
Jeff Roberson <jroberson_at_chesapeake.net> wrote:

> http://people.freebsd.org/~jeff/ule.diff
> 
> This patch is scheduled for inclusion in 7.0.  I would like anyone who 
> cares to run it to validate that it does not create any stability or 
> performance regression over the existing ULE.  This patch replaces ULE 
> with SCHED_SMP, which will now no longer exist as a seperate fork of ULE.
> 
> Briefly, this is still a very suitable scheduler for uniprocessor machines 
> while providing stronger affinity and other performance improvements for 
> multiprocessor machines.
> 
> Even "works for me!" type responses are welcome so I know roughly how many 
> people have tested before I commit this close to release.
> 
> Thanks!
> Jeff
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Works here on a quad-core E5310 on i386, except that when I run
distributed.net I still sometimes see one full processor completely idle
with 4 cruncher processes. This used to happen on on older quad processor
Pentium 3 Xeon system when I was testing months ago. Changing
kern.sched.steal_idle or kern.sched.balance makes no difference.

Nick