Heavy I/O blocks FreeBSD box for several seconds

[Andriy Gapon]

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 at 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