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Date: Wed, 06 Jul 2011 17:26:43 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: arrowdodger <6yearold@gmail.com>
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Cc: FreeBSD Current <freebsd-current@FreeBSD.org>,
	"O. Hartmann" <ohartman@zedat.fu-berlin.de>
Subject: Re: Heavy I/O blocks FreeBSD box for several seconds
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on 06/07/2011 15:35 arrowdodger said the following:
> On Wed, Jul 6, 2011 at 3:37 PM, Andriy Gapon <avg@freebsd.org
> <mailto:avg@freebsd.org>> wrote:
> 
>     Just curious what your current value of sysctl kern.sched.preempt_thresh is.
>     And if it's not 224 and if you haven't tried 224 yet, then could you please try
>     it and see if there is any improvement?
> 
>     This assumes that you use SCHED_ULE (kern.sched.name <http://kern.sched.name>
>     is "ULE").
> 
> Whoa, it's definitely better! Thanks a lot.

Thank you for the report.
I guess I will try to push for this value to become the default.

> But still, when IO causes system to
> use swap, X11 became completely unusable.

Swap is a bit different issue.

-- 
Andriy Gapon