From owner-freebsd-stable@FreeBSD.ORG Wed Oct 17 09:58:06 2007 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 8F7FE16A41A; Wed, 17 Oct 2007 09:58:06 +0000 (UTC) (envelope-from bengta@P142.sics.se) Received: from brev.sics.se (brev.sics.se [193.10.64.200]) by mx1.freebsd.org (Postfix) with ESMTP id 0EED213C447; Wed, 17 Oct 2007 09:58:05 +0000 (UTC) (envelope-from bengta@P142.sics.se) Received: from P142.sics.se (ip68.infrahip.net [193.167.187.68]) by brev.sics.se (8.12.8/8.12.8) with ESMTP id l9H8vqVF032548 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 17 Oct 2007 10:57:52 +0200 Received: from P142.sics.se (localhost [127.0.0.1]) by P142.sics.se (8.13.8/8.13.8) with ESMTP id l9H9145g001573; Wed, 17 Oct 2007 11:01:04 +0200 (CEST) (envelope-from bengta@P142.sics.se) Received: (from bengta@localhost) by P142.sics.se (8.13.8/8.13.8/Submit) id l9H913vv001572; Wed, 17 Oct 2007 11:01:03 +0200 (CEST) (envelope-from bengta@P142.sics.se) To: "[LoN]Kamikaze" From: Bengt Ahlgren In-Reply-To: <47150D87.3070804@gmx.de> (LoN_Kamikaze@gmx.de's message of "Tue, 16 Oct 2007 21:14:15 +0200") References: <47150D87.3070804@gmx.de> Date: Wed, 17 Oct 2007 11:01:03 +0200 Message-ID: User-Agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Virus-Scanned: by amavisd-new Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org Subject: Re: SCHED_4BSD in RELENG_7 disturbs workflow 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: Wed, 17 Oct 2007 09:58:06 -0000 "[LoN]Kamikaze" writes: >>>From my perspective scheduling on RELENG_6 was way better. Even on a full > workload like a portupgrade the focused application (both in X and on the > console) always received enough cycles to run smoothly and applications that > ran in background like audio players also kept on running fine. > > Quite the contrary on RELENG_7. During a portupgrade or even worse 'pkgdb -L' > (recovering lost dependencies) audio players (both graphical and mplayer) > scatter, either because they don't get the hard-disk or CPU-cycles (which one, > I don't know) and the focused application also often hangs. It just looks like > occasionally (under load) everything freezes for a second and then goes on > relatively normal. Do you have ATA write-caching on or off? My experience is that if you turn caching off (on RELENG_6_x at least, have not tried 7) the machine often freezes for seconds when you are writing a lot to the disk. Bengt