Date: Wed, 14 Dec 2011 06:06:43 -0500 From: George Mitchell <george+freebsd@m5p.com> To: Attilio Rao <attilio@freebsd.org>, freebsd-stable@freebsd.org Subject: Re: SCHED_ULE should not be the default Message-ID: <4EE88343.2050302@m5p.com> In-Reply-To: <4EE2AE64.9060802@m5p.com> References: <4EE1EAFE.3070408@m5p.com> <CAJ-FndDniGH8QoT=kUxOQ%2BzdVhWF0Z0NKLU0PGS-Gt=BK6noWw@mail.gmail.com> <4EE2AE64.9060802@m5p.com>
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On 12/09/11 19:57, George Mitchell wrote: > 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 There have been 22 downloads of this file so far; does anyone who looked at it have any results to report? Dear Secret Masters of FreeBSD: Can we have a decision on whether to change back to SCHED_4BSD while SCHED_ULE gets properly fixed? -- George Mitchell > >> >> and send the file to this mailing list. >> >> Thanks, >> Attilio >> >> > > I hope this helps. -- George Mitchell
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