How to switch scheduler on 7.0?

Daniel Tourde daniel.tourde at
Wed Apr 16 16:48:35 UTC 2008

Hi Robert,

The expression "terrible performances" was maybe not the best way to express 
myself. My intentions were not to step on anyone's toe or being nasty. Sorry 
about that.

To describe things shortly, the problem is responsiveness. I have been running 
FreeBSD since 4.7 and never experienced what I am experiencing now:
- Bad responsiveness of the desktop
- Temporary freeze (10 to 30s)
- Slow mouse (and not a very smooth movement, a kind of 'step by step')


> >  >  I would like to switch scheduler on my FreeBSD 7.0 box but I don't
> >  >  know how todo that.
> >
> >  You will want to use options SCHED_ULE instead of SCHED_4BSD in your
> >  kernel config.
> 	Am I correct in remembering SCHED_ULE /is/ the default for 7.0+?
> 	If this is true, and you (the OP) do not need the machine for
> production, there are people who would be interested in hearing
> about your problems - especially if you are prepared to define (and
> document) "terrible performace" and help diagnosing the issue.
> 				Robert Huff

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