Re: Heavy I/O blocks FreeBSD box for several seconds

From: Andriy Gapon <avg_at_FreeBSD.org>
Date: Wed, 06 Jul 2011 17:26:43 +0300
on 06/07/2011 15:35 arrowdodger said the following:
> On Wed, Jul 6, 2011 at 3:37 PM, Andriy Gapon <avg_at_freebsd.org
> <mailto: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 <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
Received on Wed Jul 06 2011 - 12:26:48 UTC

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