From owner-freebsd-current@FreeBSD.ORG Sun Oct 30 09:37:20 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org 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 D238016A41F; Sun, 30 Oct 2005 09:37:20 +0000 (GMT) (envelope-from obrien@NUXI.com) Received: from dragon.NUXI.org (trang.nuxi.com [66.93.134.19]) by mx1.FreeBSD.org (Postfix) with ESMTP id 75ED543D45; Sun, 30 Oct 2005 09:37:20 +0000 (GMT) (envelope-from obrien@NUXI.com) Received: from dragon.NUXI.org (obrien@localhost [127.0.0.1]) by dragon.NUXI.org (8.13.4/8.13.4) with ESMTP id j9U9bJO5043252; Sun, 30 Oct 2005 01:37:19 -0800 (PST) (envelope-from obrien@dragon.NUXI.org) Received: (from obrien@localhost) by dragon.NUXI.org (8.13.4/8.13.1/Submit) id j9U9bIkX043251; Sun, 30 Oct 2005 01:37:18 -0800 (PST) (envelope-from obrien) Date: Sun, 30 Oct 2005 01:37:18 -0800 From: "David O'Brien" To: David Xu Message-ID: <20051030093718.GE39253@dragon.NUXI.org> Mail-Followup-To: freebsd-current@freebsd.org, David Xu , Alexander Leidinger References: <30595.1130493297@critter.freebsd.dk> <20051028153457.d0wqgn2ask4sgw4k@netchild.homeip.net> <20051029195703.GB39253@dragon.NUXI.org> <43646AAC.2080107@freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <43646AAC.2080107@freebsd.org> X-Operating-System: FreeBSD 7.0-CURRENT Organization: The NUXI BSD Group X-Pgp-Rsa-Fingerprint: B7 4D 3E E9 11 39 5F A3 90 76 5D 69 58 D9 98 7A X-Pgp-Rsa-Keyid: 1024/34F9F9D5 User-Agent: Mutt/1.5.9i Cc: Alexander Leidinger , freebsd-current@freebsd.org Subject: Re: TSC instead of ACPI: powerd doesn't work anymore (to be expected?) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: freebsd-current@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Oct 2005 09:37:20 -0000 On Sun, Oct 30, 2005 at 02:39:40PM +0800, David Xu wrote: > David O'Brien wrote: > >On Fri, Oct 28, 2005 at 03:34:57PM +0200, Alexander Leidinger wrote: > >>I don't have the message at hand. I just had time to write the mail, but I > >>don't have my laptop with me to reproduce the message. But it's easy to > >>reproduce, just take a PC which is able to make use of powerd and switch > >>to > >>using TSC as the timecounter. > > > >What is the motivation to use the TSC as a timecounter? > > TSC is faster than any others, on many systems, so-called ACPI-fast > timer is really a slow chip, Correct, but why is it felt the latency of the ACPI timer is an issue? Of course we all want things to as fast as possible, but is that just an abstract desire, or a real issue was run into? -- -- David (obrien@FreeBSD.org)