From owner-freebsd-stable@FreeBSD.ORG Tue Jul 18 14:10:50 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DAAF916A4DF for ; Tue, 18 Jul 2006 14:10:50 +0000 (UTC) (envelope-from matthieu.michaud@epita.info) Received: from marge.cload.net (marge.cload.net [213.41.172.209]) by mx1.FreeBSD.org (Postfix) with SMTP id DE17B43D5C for ; Tue, 18 Jul 2006 14:10:47 +0000 (GMT) (envelope-from matthieu.michaud@epita.info) Received: (qmail 11139 invoked by uid 80); 18 Jul 2006 16:12:28 +0200 Received: from 163.5.255.60 (SquirrelMail authenticated user ohmer@epita.info) by webmail.epita.info with HTTP; Tue, 18 Jul 2006 16:12:28 +0200 (CEST) Message-ID: <64643.163.5.255.60.1153231948.squirrel@webmail.epita.info> In-Reply-To: <20060718152306.X36995@godot.imp.ch> References: <20060718152306.X36995@godot.imp.ch> Date: Tue, 18 Jul 2006 16:12:28 +0200 (CEST) From: "Matthieu Michaud" To: "Martin Blapp" User-Agent: SquirrelMail/1.4.6 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal Cc: freebsd-stable@freebsd.org Subject: Re: Please confirm: top(1) cpu time broken on FreeBSD 6.1 (RELEASE/STABLE) SMP ? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: matthieu.michaud@epita.info List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Jul 2006 14:10:50 -0000 Le Mar 18 juillet 2006 15:31, Martin Blapp a écrit : > > Hi all, hi, > I'm currently seeing strang things going on on all our > upgraded SMP 2 CPU boxes. 4 Boxes are upgraded from 5.5 to > 6 STABLE, one box is running 6.1 RELEASE. i'm running 6.1 RELEASE upgraded from 6.0 RELEASE. > All of them have SMP kernels, just using the provided GENERIC and SMP > kernel config files. Mergemaster has been done on all > boxes. > > If a box is full loaded top(1) shows: > > CPU states: 41.7% user, 0.0% nice, 7.7% system, 0.6% interrupt, 50.0% > idle > > I can buildworld -j 100, do verything what I want. The > sum of idle time never goes below 50.0% idle ! And the sum > of total CPU time never goes over 50.0%. i ran make buildworld -j8 and i confirm. afair it was ok on 6.0-RELEASE. > So I wonder if just top is broken (in 6.1 RELEASE too), or if this > is a SCHED4BSD bug. > > Can someone confirm this issue ? We see it on IBL X-Series 346 Boxes, > as on IBM 306M Dual Core SMP systems. i have a DELL 1600SC (bi-xeons) with a SMP kernel and machdep.hyperthreading_allowed=0. setting it to 1 made idle % to 0. -- Matthieu Michaud EPITA SRS 2007