From owner-freebsd-questions@FreeBSD.ORG Wed Apr 16 12:46:00 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 798B1106566C for ; Wed, 16 Apr 2008 12:46:00 +0000 (UTC) (envelope-from roberthuff@rcn.com) Received: from smtp02.lnh.mail.rcn.net (smtp02.lnh.mail.rcn.net [207.172.157.102]) by mx1.freebsd.org (Postfix) with ESMTP id 31D5F8FC1F for ; Wed, 16 Apr 2008 12:45:59 +0000 (UTC) (envelope-from roberthuff@rcn.com) Received: from mr08.lnh.mail.rcn.net ([207.172.157.28]) by smtp02.lnh.mail.rcn.net with ESMTP; 16 Apr 2008 08:46:00 -0400 Received: from smtp01.lnh.mail.rcn.net (smtp01.lnh.mail.rcn.net [207.172.4.11]) by mr08.lnh.mail.rcn.net (MOS 3.8.6-GA) with ESMTP id JVT60459; Wed, 16 Apr 2008 08:45:59 -0400 (EDT) Received: from 209-6-22-188.c3-0.smr-ubr1.sbo-smr.ma.cable.rcn.com (HELO jerusalem.litteratus.org.litteratus.org) ([209.6.22.188]) by smtp01.lnh.mail.rcn.net with ESMTP; 16 Apr 2008 08:45:56 -0400 From: Robert Huff MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <18437.62724.679769.189650@jerusalem.litteratus.org> Date: Wed, 16 Apr 2008 08:45:56 -0400 To: "Stanislav Antic" In-Reply-To: <282f7f940804152334m1c03d300xffd8e3c350c22822@mail.gmail.com> References: <200804152159.46589.daniel.tourde@spray.se> <18437.34871.726719.679184@jerusalem.litteratus.org> <282f7f940804152332y4f5cadfdob9d3957dcb265a57@mail.gmail.com> <282f7f940804152334m1c03d300xffd8e3c350c22822@mail.gmail.com> X-Mailer: VM 7.17 under 21.5 (beta28) "fuki" XEmacs Lucid X-Junkmail-Whitelist: YES (by domain whitelist at mr08.lnh.mail.rcn.net) Cc: freebsd-questions@freebsd.org Subject: Re: How to switch scheduler on 7.0? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Apr 2008 12:46:00 -0000 Stanislav Antic writes: > > ULE has substantial improvements over BSD for multiprocessor > > hardware. > > > Does ULE works better on a single CPU machines? I an not an expert; however, based on material reported here: In terms of perforance, ULE and BSD are equivalent on UP machines - BSD works better in some cases, ULE in others. If I had to put money down, I'd give a very slight advantage to ULE. Measured by stability, ULE is a moderate win. Absent specific cases to the contrary, one reason to go with ULE is that it where future development is focused. That's not to say BSD is being kicked off the train, exactly, just that it won't be the target for the latest and greatest. More qualified voices will please tell what I have remembered wrong. Robert Huff