From owner-freebsd-questions@FreeBSD.ORG Thu Jan 20 19:56:56 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9B6F016A4CE for ; Thu, 20 Jan 2005 19:56:56 +0000 (GMT) Received: from rogers.com (CPE00095bf5ff21-CM000f9f578d7a.cpe.net.cable.rogers.com [70.24.145.136]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0606543D2D for ; Thu, 20 Jan 2005 19:56:56 +0000 (GMT) (envelope-from gbell72@gardnerbell.ca) Received: from gardnerbell.ca (localhost [127.0.0.1]) by rogers.com (8.13.1/8.13.1) with ESMTP id j0KJsWwW071215 for ; Thu, 20 Jan 2005 14:54:32 -0500 (EST) (envelope-from gbell72@gardnerbell.ca) Received: (from gbell72@localhost) by gardnerbell.ca (8.13.1/8.13.1/Submit) id j0KJsRvh071214 for freebsd-questions@freebsd.org; Thu, 20 Jan 2005 14:54:27 -0500 (EST) (envelope-from gbell72) Date: Thu, 20 Jan 2005 14:54:27 -0500 From: Gardner Bell To: freebsd-questions@freebsd.org Message-ID: <20050120195427.GA71178@gardnerbell.ca> Mail-Followup-To: freebsd-questions@freebsd.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.2.1i Subject: Thread Scheduling X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Jan 2005 19:56:56 -0000 While reading The Design and Implementation of FreeBSD I came across the section on thread scheduling. At the present time I am only testing FreeBSD on a single processor system, but will be moving to an SMP once I complete building it. Now it says that since FreeBSD 5.0 the /sys/kern/sched_ule.c along with the historic 4.4BSD scheduler is available to be used at the time the kernel is built. My question is, will I notice any performance improvement by using the new scheduler opposed to the 4.4BSD scheduler on an SMP system and can the new scheduler be utilized on a single processor system? The intended use of the SMP system is for MySQL databases only. Note: I'm far from a C or kernel guru so if anyone replies please respond in a manner a noobie to C would understand. Regards Gardner