Heavy I/O blocks FreeBSD box for several seconds

[O. Hartmann]

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.