Re: cvs commit: src/sys/kern sched_ule.c (fwd)

On Mon, 13 Dec 2004, Jeff Roberson wrote:

> On Mon, 13 Dec 2004, Jeff Roberson wrote:
>
> > ULE works again with preemption and kse and so on.  As far as I know, the
> > only two problems with ULE currently are these:
>         ^three
> >
> > 1)  nice +20 processes steal too much time from workloads that have some
> > amount of idle time and lots of context switches (buildworld).
> > 2)  a nice +20 process can not be killed until there is some idle time in
> > the system.

I just fixed this one too.

> > 3)  Performance is not what it could be, especially on HTT.
> >
> > If you encounter any other problems with ULE, please email me directly,
> > without a current cc, as this will ensure the least amount of lag in
> > reply.
> >
> > Thanks,
> > Jeff
> >
> > ---------- Forwarded message ----------
> > Date: Mon, 13 Dec 2004 13:09:33 +0000 (UTC)
> > From: Jeff Roberson <jeff_at_FreeBSD.org>
> > To: src-committers_at_FreeBSD.org, cvs-src_at_FreeBSD.org, cvs-all_at_FreeBSD.org
> > Subject: cvs commit: src/sys/kern sched_ule.c
> >
> > jeff        2004-12-13 13:09:33 UTC
> >
> >   FreeBSD src repository
> >
> >   Modified files:
> >     sys/kern             sched_ule.c
> >   Log:
> >    - Take up a 'slot' while we're on the assigned queue, waiting to be
> >      posted to another processor.  Otherwise, kern_switch() gets confused
> >      and tries to sched_add(NULL).
> >
> >   Revision  Changes    Path
> >   1.138     +16 -16    src/sys/kern/sched_ule.c
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