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Date: Sun, 11 Oct 2009 19:39:12 -0700
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Larry Rosenman <ler@lerctr.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: Scheduler weirdness
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On Sun, Oct 11, 2009 at 08:51:48PM -0500, Larry Rosenman wrote:
> 
> On Sun, October 11, 2009 8:48 pm, Steve Kargl wrote:
> > On Sun, Oct 11, 2009 at 05:59:52PM -0500, Larry Rosenman wrote:
> >>
> >> Ok, running RELENG_8 from Friday (10/9/2009).
> >>
> >> If I have 4 Folding-at-home processes running (they nice themselves) the
> >> system is slow as a dog.
> >>
> >> If I stop them, it's speedy.
> >>
> >> This is running SCHED_ULE
> >>
> >> is this expected?
> >>
> >> What can I do to help?
> >>
> >
> > How many cpus are available on your system?  If you're in an
> > over-commit situation with numerical intensive applications,
> > you may find 4BSD to be a better option.
> 4 cpu's.
> 

So, you have 4 cpus and 4 folding-at-home processes and you're
trying to use the system with other apps?  Switch to 4BSD.

-- 
Steve