From owner-freebsd-questions@FreeBSD.ORG  Thu Feb 12 05:36:25 2015
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 7E9C96C5
 for <freebsd-questions@freebsd.org>; Thu, 12 Feb 2015 05:36:25 +0000 (UTC)
Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com
 [IPv6:2607:f8b0:400e:c03::235])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 4B3939DB
 for <freebsd-questions@freebsd.org>; Thu, 12 Feb 2015 05:36:25 +0000 (UTC)
Received: by mail-pa0-f53.google.com with SMTP id lf10so8932613pab.12
 for <freebsd-questions@freebsd.org>; Wed, 11 Feb 2015 21:36:25 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:in-reply-to:references:date:message-id:subject:from:to
 :cc:content-type;
 bh=kjpYAPql8USru8lXVBtixwjJZ9/HQnNoCbSf36CTIvQ=;
 b=d3sUpJiOVF7qPEbySLGbWWLX3loweRQHkV+d/5jwKsTSSx6pM/HEWA7xcglJMrtIdc
 W5D+ns0MG87WUw8tx3pOfKVmmTUqqCs6sAouWBN1PPZDxgU8ioM4IwSLOmwCPGie10Q3
 ILVm2WQpozL1OcH4viRd+ipIIOsWJIJ8OCGgcI7UEkPBNB3hvmFno6uKNnEBaQWm4vIY
 ZT+hxyDuQui30OFOKE4kTYNeX+SeivGl+RHnM5KvL1TN2s2N+whIemCc2vLnMTARS3U3
 k011lKpLtF37WkhU51TC1Nqp3X2wsWfImhMQl4YfroOrxZ+PP3DI/hlOtcViCeIfAqzL
 WSwA==
MIME-Version: 1.0
X-Received: by 10.68.200.36 with SMTP id jp4mr3280160pbc.153.1423719384930;
 Wed, 11 Feb 2015 21:36:24 -0800 (PST)
Received: by 10.70.110.134 with HTTP; Wed, 11 Feb 2015 21:36:24 -0800 (PST)
In-Reply-To: <AE5A370C-A7F7-41D2-900D-B26521A2D705@pobox.com>
References: <AE5A370C-A7F7-41D2-900D-B26521A2D705@pobox.com>
Date: Wed, 11 Feb 2015 23:36:24 -0600
Message-ID: <CA+tpaK3bn-UPrqTU9cME2V9Ls=auf1n0rdr+uHA1b7pcspmiPw@mail.gmail.com>
Subject: Re: How to adjust clock frequency in FreeBSD 10.1 ?
From: Adam Vande More <amvandemore@gmail.com>
To: Rick Thomas <rbthomas@pobox.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1
Cc: FreeBSD Questions <freebsd-questions@freebsd.org>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 12 Feb 2015 05:36:25 -0000

On Wed, Feb 11, 2015 at 9:09 PM, Rick Thomas <rbthomas@pobox.com> wrote:

> Hi All,
>
> I=E2=80=99ve got a machine with a really bad clock.  When I run NTP on it=
, the
> freq goes straight to 500.0 (over a period of a few days) and stays there=
,
> while the offset grows and grows.
>
> I recently switched this machine from Debian Linux to FreeBSD (wanting to
> learn more about FreeBSD).  Under Linux, I used adjtimex to modify the TI=
CK
> value and (once I had converged on the right value) NTP was able to
> stabilize the clock.
>
> Is there an equivalent hack for FreeBSD?
>

You may wish to play around w/

sysctl kern.timecounter

to find a setting that works for you.

--=20
Adam