Date: Sat, 5 Apr 2008 03:58:03 -0700 From: Jeremy Chadwick <koitsu@freebsd.org> To: Guido van Rooij <guido@gvr.org> Cc: David Malone <dwmalone@maths.tcd.ie>, freebsd-stable@freebsd.org Subject: Re: NTP on amd74 + powernow issues Message-ID: <20080405105803.GA2947@eos.sc1.parodius.com> In-Reply-To: <20080405091349.GA78080@gvr.gvr.org> References: <20080404174605.GA41929@gvr.gvr.org> <20080404194238.GA75601@walton.maths.tcd.ie> <20080405091349.GA78080@gvr.gvr.org>
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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 |
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