Mike Jakubik wrote:
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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ULE is about 10-20% slower than 4BSD except under minimal load, in my
testing.
Kris
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