From owner-freebsd-current@FreeBSD.ORG Thu Dec 18 12:05:55 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A322116A4CE for ; Thu, 18 Dec 2003 12:05:55 -0800 (PST) Received: from otter3.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5F9F743D1F for ; Thu, 18 Dec 2003 12:05:52 -0800 (PST) (envelope-from anderson@centtech.com) Received: from centtech.com (neutrino.centtech.com [10.177.171.220]) by otter3.centtech.com (8.12.3/8.12.3) with ESMTP id hBIK5p6T029720; Thu, 18 Dec 2003 14:05:51 -0600 (CST) (envelope-from anderson@centtech.com) Message-ID: <3FE20898.6050104@centtech.com> Date: Thu, 18 Dec 2003 14:05:44 -0600 From: Eric Anderson User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Nuno Teixeira References: <20031218194326.GA12548@SDF.LONESTAR.ORG> In-Reply-To: <20031218194326.GA12548@SDF.LONESTAR.ORG> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-current@freebsd.org Subject: Re: Any reasons to change BSD scheduler: SCHED_4BSD to SCHED_ULE? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Dec 2003 20:05:55 -0000 Nuno Teixeira wrote: >Hello to all, > >I'm using 5.2 RC and I'd like to know if are good reasons to change my >sheduler to the new one on a UP machine. > > Well, just my $0.02, but last night, while doing some heavy cpu/io stuff, I noticed that _ULE is in action - I was running mencoder, xmms, ftp'ing a file locally (100mbit), using a handful of xterm's, and my usual batch of stuff (netscape/mozilla, gaim, etc) - and I noticed the machine (even though it was heavily loaded) was VERY responsive, and I hardly even noticed any load on it at all. Now, under SCHED_4BSD, I definitely would have noticed.. I know because I went back to 4BSD for a few days when trying to hunt down a bug, and that's when I realized there really is a difference.. But, ymmv.. Eric -- ------------------------------------------------------------------ Eric Anderson Systems Administrator Centaur Technology All generalizations are false, including this one. ------------------------------------------------------------------