Re: SCHED_ULE on desktop system

On 9/16/07, David E. Thiel <lx_at_freebsd.org> wrote:
> On Sun, Sep 16, 2007 at 03:50:19PM -0700, Kevin Oberman wrote:
> > I have been seeing this for quite some time and, while the scheduler may
> > make a bit of difference, I suspect pager issues. As long as I have
> > available memory, interactivity is fine. If I run a big build and I see
> > swap file use, things slow to a crawl. I see very slow re-draws of the
> > screen and general lack of responsiveness.
> >
> > I run gkrellm and can tell at a glance when swap usage starts to
> > increase. The linkage is clear and not terribly surprising. It may be
> > that you need to add a bit more RAM.
>
> While I wouldn't mind adding more RAM, this happens with about 60%
> memory utilization, and top verifies no swap is being used. I'll believe
> that it may not be all the scheduler's fault (since I see it to some
> degree regardless of scheduler), but in my case, it's not paging.
>
> I did actually just switch to 4BSD without PREEMPTION, and the audio
> skipping and jerkiness that I was getting before is no longer happening.
> Maybe something in PREEMPTION is causing problems with both schedulers?
>

Could you try setting kern.hz="100"

Thanks.

 -Kip