Date: Wed, 06 Jul 2011 17:26:43 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: arrowdodger <6yearold@gmail.com> 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 Message-ID: <4E1470A3.30607@FreeBSD.org> In-Reply-To: <CALH631kYhFHQycgVtgnnezCz-SU4d2GfqApDtc_RSb5D%2B9AaSA@mail.gmail.com> References: <4E1421D9.7080808@zedat.fu-berlin.de> <CALH631=F4bSgNDE4w0qcXGMgGxZRRwCP9n-H4M0c%2B1UEaqWr7Q@mail.gmail.com> <4E144913.3060503@FreeBSD.org> <CALH631kYhFHQycgVtgnnezCz-SU4d2GfqApDtc_RSb5D%2B9AaSA@mail.gmail.com>
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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
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