Date: Fri, 09 Dec 2011 19:57:08 -0500 From: George Mitchell <george+freebsd@m5p.com> To: Attilio Rao <attilio@freebsd.org> Cc: George Mitchell <george+freebsd@m5p.com>, freebsd-stable@freebsd.org Subject: Re: SCHED_ULE should not be the default Message-ID: <4EE2AE64.9060802@m5p.com> In-Reply-To: <CAJ-FndDniGH8QoT=kUxOQ%2BzdVhWF0Z0NKLU0PGS-Gt=BK6noWw@mail.gmail.com> References: <4EE1EAFE.3070408@m5p.com> <CAJ-FndDniGH8QoT=kUxOQ%2BzdVhWF0Z0NKLU0PGS-Gt=BK6noWw@mail.gmail.com>
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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
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