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Date: Thu, 18 Nov 2010 20:11:58 +0000
From: Bruce Cran <bruce@cran.org.uk>
To: Lucius Windschuh <lwindschuh@googlemail.com>
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Cc: Alexander Best <arundel@freebsd.org>, freebsd-performance@freebsd.org,
	Andriy Gapon <avg@freebsd.org>
Subject: Re: TTY task group scheduling
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[removed current and stable from Cc list]

On Thu, 18 Nov 2010 19:55:05 +0100
Lucius Windschuh <lwindschuh@googlemail.com> wrote:

> Because currently, my machine is barely usable if a compile job with
> parallelism is running. Movies stutter, Firefox hangs. And even nice
> -n 20 doesn't do the job in every case, as +20 seems not to be the
> idle priority anymore?!?

Have you tried increasing kern.sched.preempt_thresh? According to
http://groups.google.com/group/mailing.freebsd.stable/browse_thread/thread/05a39f816fd8acc6/82affa9f195b747d?lnk=raot&fwc=1&pli=1
a good value for desktop use would be 224.

-- 
Bruce Cran