Re: I like SCHED_4BSD

On Wed, Mar 10, 2004 at 09:36:45PM -0600, Conrad Sabatier wrote:
> I just decided to revert to SCHED_4BSD for the time being.  Why?
> 
> o Better interactivity -- No mouse jerkiness, no sluggish screen updates when
>   switching between virtual desktops, etc.
> 
> o Better scheduling!  I'm serious here.  Watching top under SCHED_ULE, I'm
>   seeing 10, 15, 20 seconds go by where ALL processes are sleeping. 
>   Processes seem to be spending inordinate amounts of time in the "kserel"
>   state.  This, of course, doesn't happen with SCHED_4BSD.

That this observation may well be bogus, because you're trying to
measure the scheduler using a tool that is itself run by the
scheduler, so the process stats you see may not be representative of
what is really happening on your system.

Kris