RELENG_6: Which scheduler for SMP?
Mike Jakubik
mikej at rogers.com
Wed Dec 28 12:14:24 PST 2005
Mark Ovens wrote:
> I've never had any success with the ULE scheduler on my dual Athlon
> box running RELENG_5; it was so unstable it made Windows 3.1 look
> stable. In fact my current build, cvsup'd a couple of days ago, won't
> even boot with ULE.
>
> From what I remember, ULE was intended to become the default scheduler
> during the life of 5.0 but that hasn't happened.
>
> I've just cvsup'd the source for RELENG_6 and I'm surprised to find in
> the GENERIC config file:
>
> #options SCHED_ULE # ULE scheduler
> options SCHED_4BSD # 4BSD scheduler
>
> so it seems 4BSD is still the default scheduler. Is ULE _still_
> considered to be in development/experimental? Even the SMP config file
> doesn't use ULE.
There have been substantial improvements made to it since 5. However no
one will be able to tell you if its 100% ready, you will just have to
try it on your system.
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