From owner-freebsd-stable@FreeBSD.ORG Sat Apr 5 10:58:04 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0F05D106564A for ; Sat, 5 Apr 2008 10:58:04 +0000 (UTC) (envelope-from jdc@parodius.com) Received: from mx01.sc1.parodius.com (mx01.sc1.parodius.com [72.20.106.3]) by mx1.freebsd.org (Postfix) with ESMTP id E7F4E8FC21 for ; Sat, 5 Apr 2008 10:58:03 +0000 (UTC) (envelope-from jdc@parodius.com) Received: by mx01.sc1.parodius.com (Postfix, from userid 1000) id B12AA1CC033; Sat, 5 Apr 2008 03:58:03 -0700 (PDT) Date: Sat, 5 Apr 2008 03:58:03 -0700 From: Jeremy Chadwick To: Guido van Rooij Message-ID: <20080405105803.GA2947@eos.sc1.parodius.com> References: <20080404174605.GA41929@gvr.gvr.org> <20080404194238.GA75601@walton.maths.tcd.ie> <20080405091349.GA78080@gvr.gvr.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080405091349.GA78080@gvr.gvr.org> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: David Malone , freebsd-stable@freebsd.org Subject: Re: NTP on amd74 + powernow issues 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: Sat, 05 Apr 2008 10:58:04 -0000 On Sat, Apr 05, 2008 at 11:13:49AM +0200, Guido van Rooij wrote: > On Fri, Apr 04, 2008 at 08:42:38PM +0100, David Malone wrote: > > On Fri, Apr 04, 2008 at 07:46:05PM +0200, Guido van Rooij wrote: > > > I've got a amd64 system where I;m using powernow. I am using th i8254 > > > timecounter. I keep getting time resets from ntp: > > > > I don't think the i8254 should be effected by the i8254. Are there > > any other choices listed under kern.timecounter.choice? I have one > > amd64 machine running powerd to control the powernow stuff and it > > works OK with the ACPI timer. > > Nope: > kern.timecounter.choice: TSC(800) i8254(0) dummy(-1000000) > > IIRC I couldn't boot at all with acpi, so I disabled it. ACPI-fast should address the problem you're seeing with NTP drift. It would then be best to figure out why your machine won't boot with ACPI enabled. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |