From owner-freebsd-stable@FreeBSD.ORG Mon Dec 5 19:48:03 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 991B416A41F for ; Mon, 5 Dec 2005 19:48:03 +0000 (GMT) (envelope-from fullermd@over-yonder.net) Received: from mail.localelinks.com (web.localelinks.com [65.170.254.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4110743D5D for ; Mon, 5 Dec 2005 19:48:00 +0000 (GMT) (envelope-from fullermd@over-yonder.net) Received: from draco.over-yonder.net (adsl-222-65-122.jan.bellsouth.net [68.222.65.122]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.localelinks.com (Postfix) with ESMTP id 2C01FAD for ; Mon, 5 Dec 2005 13:48:00 -0600 (CST) Received: by draco.over-yonder.net (Postfix, from userid 100) id 0583061C27; Mon, 5 Dec 2005 13:47:57 -0600 (CST) Date: Mon, 5 Dec 2005 13:47:56 -0600 From: "Matthew D. Fuller" To: Kevin Oberman Message-ID: <20051205194756.GG90806@over-yonder.net> References: <20051205124910.GC90806@over-yonder.net> <20051205181552.2D7AB5D04@ptavv.es.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051205181552.2D7AB5D04@ptavv.es.net> X-Editor: vi X-OS: FreeBSD User-Agent: Mutt/1.5.11-fullermd.2 Cc: kama , freebsd-stable@freebsd.org, Peter Jeremy Subject: Re: cpu-timer rate X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Dec 2005 19:48:03 -0000 On Mon, Dec 05, 2005 at 10:15:52AM -0800 I heard the voice of Kevin Oberman, and lo! it spake thus: > > From: "Matthew D. Fuller" > > > > Because the rate is always twice hz. > > While I will concede that I have no explanation, but on all of my > systems rate = HZ +/-1. I have never seen a case where rate/2 = HZ. Well, OK, it always is when you're using the LAPIC timer, which I think is on 6.x and up (with the APIC enabled, of course). When you're using irq0, it just runs at hz. -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.