From owner-freebsd-stable@FreeBSD.ORG Mon Jan 19 13:40:03 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 915C3106566B; Mon, 19 Jan 2009 13:40:03 +0000 (UTC) (envelope-from pete@altadena.net) Received: from kestrel.altadena.net (kestrel.altadena.net [207.136.131.34]) by mx1.freebsd.org (Postfix) with ESMTP id 7730F8FC12; Mon, 19 Jan 2009 13:40:03 +0000 (UTC) (envelope-from pete@altadena.net) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=1.kestrel; d=altadena.net; h=Received:Message-ID:Date:From:User-Agent:MIME-Version:To:CC:Subject:X-Enigmail-Version:Content-Type:Content-Transfer-Encoding; b=F2cUkSrNWO9KtAbnRfxQHn7XUpBrlD1c+EehPSTUW137dGi8WHVK330RCNBpibe5Rjtg3b9Hs4MljngAY+mnAqHjgdW4/ORsvw36DWt6V+Z86Xx+0fPhBlHiuIY+9/ukZwe7DEk1DYD9krCcitwgHU7fqOxtt6bGok9Jn/knq1c=; Received: from c-69-137-63-84.hsd1.md.comcast.net ([69.137.63.84] helo=port3.altadena.net) by kestrel.altadena.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) (envelope-from ) id 1LOu7G-000O2E-CQ; Mon, 19 Jan 2009 05:24:34 -0800 Message-ID: <49747F10.7050801@altadena.net> Date: Mon, 19 Jan 2009 08:24:32 -0500 From: Pete Carah User-Agent: Thunderbird 2.0.0.19 (X11/20090111) To: Kris Kennaway X-Enigmail-Version: 0.95.6 Content-Transfer-Encoding: 7bit MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org Subject: Re: Big problems with 7.1 locking up :-( X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Jan 2009 13:40:03 -0000 Kris writes: > You and anyone else seeing performance problems should try to work > through the advice given here: > [1]http://people.freebsd.org/~kris/scaling/Help_my_system_is_slow.pdf Well, all the people in this thread have noticed that WITH NO CONFIG CHANGES f rom configs that worked fine in the past, their systems are very slow and/or locking up (mi ne are both) with the stable branch sometime (I noticed it sometime in December, but it got worse with the release.) Most were OK in October; mine (I think) were OK in late November - may narrow t hings down? Two of my systems that lock up have no internal visibility when they do (Soekris 4801's r outing; the only time-intensive things running are routing (done in irq context) and pflog. The se run with 60+ meg ram free.) These are complete lockups, though I did manage to get a ps out of my laptop last night by waiting 20 _minutes_ for it to start (!). This is not a generic perfo rmance problem. The laptop had 55 minutes of cpu time in the softdepflush thread after being up about an h our and 10 mins; this might give a hint. I didn't spot LL/RL state threads at the same time bec ause I didn't know to. Now I do. BTW - the same ps showed 8 or so user-space procs in R state wi th NO cpu time; the kernel was hogging all of it for over an hour. Firefox did indeed trigger this one as someone else noted. A soekris doing onl y routing+nat has no such excuse... At least PHK was nice enough to note the watchdog in another thread :-) -- Pete References 1. http://people.freebsd.org/%7Ekris/scaling/Help_my_system_is_slow.pdf