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Date: Fri, 09 Dec 2011 19:57:08 -0500
From: George Mitchell <george+freebsd@m5p.com>
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To: Attilio Rao <attilio@freebsd.org>
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Cc: George Mitchell <george+freebsd@m5p.com>, freebsd-stable@freebsd.org
Subject: Re: SCHED_ULE should not be the default
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On 12/09/11 10:17, Attilio Rao wrote:
> [...]
> More precisely I'd be interested in KTR traces.
> To be even more precise:
> With a completely stable GENERIC configuration (or otherwise please
> post your kernel config) please add the following:
> options KTR
> options KTR_ENTRIES=262144
> options KTR_COMPILE=(KTR_SCHED)
> options KTR_MASK=(KTR_SCHED)
>
> While you are in the middle of the slow-down (so once it is well
> established) please do:
> # sysclt debug.ktr.cpumask=""

wonderland# sysctl debug.ktr.cpumask=""
debug.ktr.cpumask: ffffffffffffffff
sysctl: debug.ktr.cpumask: Invalid argument

>
> In the end go with:
> # ktrdump -ctf>  ktr-ule-problem.out

It's 44MB, so it's at http://www.m5p.com/~george/ktr-ule-problem.out

>
> and send the file to this mailing list.
>
> Thanks,
> Attilio
>
>

I hope this helps.                                    -- George Mitchell