From owner-freebsd-questions@FreeBSD.ORG Thu Dec 29 11:21:01 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 A1E8316A41F for ; Thu, 29 Dec 2005 11:21:01 +0000 (GMT) (envelope-from kiffin.gish@planet.nl) Received: from post-23.mail.nl.demon.net (post-23.mail.nl.demon.net [194.159.73.193]) by mx1.FreeBSD.org (Postfix) with ESMTP id 12B8F43D53 for ; Thu, 29 Dec 2005 11:21:00 +0000 (GMT) (envelope-from kiffin.gish@planet.nl) Received: from gish.demon.nl ([83.160.27.223]:24413 helo=[192.168.1.33]) by post-23.mail.nl.demon.net with esmtp (Exim 4.51) id 1Ervq7-0003ru-LJ for freebsd-questions@freebsd.org; Thu, 29 Dec 2005 11:20:59 +0000 From: Kiffin Gish To: freebsd-questions@freebsd.org Content-Type: text/plain Date: Thu, 29 Dec 2005 12:21:00 +0100 Message-Id: <1135855260.1034.5.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.4.2.1 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit Subject: Using SCHED_ULE vs. SCHED_4BSD ... 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: Thu, 29 Dec 2005 11:21:01 -0000 I recently upgraded from 5.4 to 6.0 and noticed the introduction of option SCHED_ULE for supporting multi-processor environments. However, I understood that using SCHED_ULE with only one CPU can also improve performance significantly. Is this true, and if so, what are the risks involved dropping good old SCHED_4BSD for the new-and-improved scheduler? Thanks alot in advance. -- Kiffin Gish