From owner-freebsd-arch@FreeBSD.ORG Sat Oct 2 18:14:25 2004 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 34A0D16A4CF for ; Sat, 2 Oct 2004 18:14:25 +0000 (GMT) Received: from ylpvm29.prodigy.net (ylpvm29-ext.prodigy.net [207.115.57.60]) by mx1.FreeBSD.org (Postfix) with ESMTP id 92A6343D3F for ; Sat, 2 Oct 2004 18:14:24 +0000 (GMT) (envelope-from julian@elischer.org) Received: from elischer.org (adsl-67-124-49-205.dsl.snfc21.pacbell.net [67.124.49.205])i92IE5IV016379; Sat, 2 Oct 2004 14:14:06 -0400 Message-ID: <415EEFFE.5080309@elischer.org> Date: Sat, 02 Oct 2004 11:14:22 -0700 From: Julian Elischer User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.4b) Gecko/20030524 X-Accept-Language: en, hu MIME-Version: 1.0 To: Peter Holm References: <1095468747.31297.241.camel@palm.tree.com> <1096477932.3733.1471.camel@palm.tree.com> <1096489576.3733.1868.camel@palm.tree.com> <200409291652.29990.jhb@FreeBSD.org> <1096496057.3733.2163.camel@palm.tree.com> <1096603981.21577.195.camel@palm.tree.com> <1096608201.21577.203.camel@palm.tree.com> <20041001141040.GA1556@peter.osted.lan> <1096647194.27811.12.camel@palm.tree.com> <20041001192551.GA3381@peter.osted.lan> <20041002053351.GA6259@peter.osted.lan> In-Reply-To: <20041002053351.GA6259@peter.osted.lan> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit cc: Stephan Uphoff cc: "freebsd-arch@freebsd.org" Subject: Re: scheduler (sched_4bsd) questions X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 02 Oct 2004 18:14:25 -0000 Peter Holm wrote: > On Fri, Oct 01, 2004 at 09:25:51PM +0200, Peter Holm wrote: > >>>>For once I'm the bearer of good news. The switch_patch_v2 + the >>>>sched_4bsd patch ran the tests for more than one hour without >>>>any freeze. The sched_4bsd alone did not stop the freezes. I'm >>>>now testing the switch_patch_v2 alone and it's looking good for >>>>55+ minutes of testing. >>> >>>Great ! >>>I guess I should roll a cleaned up cumulative patch soon. >>> >>> Stephan >> >>I have now been running the stress test for more than 3½ hours, without >>any freezes. I have included the two of your changes I have been using. >> >>- Peter > > > After more testing, I'm sad to report that the freeze is still there. > The patch has however decreased the number of freezes dramatically: > > During 14 hours of testing 3 separate freezes has been seen: > > 24 Giant held for more than 60 sec by td 0xc244e900, pid 27683 > 31 Giant held for more than 60 sec by td 0xc1b7b600, pid 12098 > 79 Giant held for more than 60 sec by td 0xc25f3180, pid 75531 > > - Peter > _______________________________________________ > freebsd-arch@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arch > To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org" When this happes, drop to debugger.. using: kdb_enter("Giant too long"); and dump out teh thread backtrace, and the output of show ktr iff you have ktr enabled.. (as we discussed before)