From owner-freebsd-current@FreeBSD.ORG Fri Jul 9 16:23:20 2004 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 C6F1216A4CE for ; Fri, 9 Jul 2004 16:23:20 +0000 (GMT) Received: from out009.verizon.net (out009pub.verizon.net [206.46.170.131]) by mx1.FreeBSD.org (Postfix) with ESMTP id 60E6543D46 for ; Fri, 9 Jul 2004 16:23:20 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from [192.168.1.3] ([68.161.84.3]) by out009.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040709162319.FDJO29216.out009.verizon.net@[192.168.1.3]>; Fri, 9 Jul 2004 11:23:19 -0500 Message-ID: <40EEC665.5010608@mac.com> Date: Fri, 09 Jul 2004 12:23:01 -0400 From: Chuck Swiger Organization: The Courts of Chaos User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040608 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Chris Stenton References: <014701c465ce$4e6a8a90$037ba8c0@gnome.co.uk> In-Reply-To: <014701c465ce$4e6a8a90$037ba8c0@gnome.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Authentication-Info: Submitted using SMTP AUTH at out009.verizon.net from [68.161.84.3] at Fri, 9 Jul 2004 11:23:19 -0500 cc: current@freebsd.org Subject: Re: default HZ value in 5.2.1 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: Fri, 09 Jul 2004 16:23:20 -0000 Chris Stenton wrote: > Any reason why the default value for HZ is still set at 100? Sure. Timer interrupts and context switching aren't free, you know: the faster the HZ, the more time the system spends on overhead rather than doing useful work. > Would not 1000 be better for finer granularity? Certainly it would, but tradeoffs exist.... -- -Chuck