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Date: Wed, 06 Jul 2011 18:41:00 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: "O. Hartmann" <ohartman@zedat.fu-berlin.de>
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Cc: FreeBSD Current <freebsd-current@FreeBSD.org>
Subject: Re: Heavy I/O blocks FreeBSD box for several seconds
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on 06/07/2011 18:33 O. Hartmann said the following:
> On 07/06/11 14:35, arrowdodger wrote:
>> On Wed, Jul 6, 2011 at 3:37 PM, Andriy Gapon<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 is "ULE").
>>>
>>> -- 
>>> Andriy Gapon
>>>
>>
>> Whoa, it's definitely better! Thanks a lot. But still, when IO causes system
>> to use swap, X11 became completely unusable.
> 
> I had tkern.sched.preempt_thresh  already set to 96.

In what sense 'already'?

-- 
Andriy Gapon