From owner-freebsd-questions@FreeBSD.ORG Sun Feb 15 09:27:16 2015 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id A391130B for ; Sun, 15 Feb 2015 09:27:16 +0000 (UTC) Received: from sasl.smtp.pobox.com (pb-sasl1.int.icgroup.com [208.72.237.25]) by mx1.freebsd.org (Postfix) with ESMTP id 6C2B1FFD for ; Sun, 15 Feb 2015 09:27:15 +0000 (UTC) Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by pb-sasl1.pobox.com (Postfix) with ESMTP id 5901330007; Sun, 15 Feb 2015 04:27:13 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=subject :mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s=sasl; bh= pfQ+XyB3nsZoZKC7Qj9XbEI7XSY=; b=Xt6qH8gwZr5yf5u18NTajI6c8ahPgHtB bk034fPp6D+CyHNcJRxPEspgkRu/pLY7iHaIyEL1pg0rC2E0wrsV2UYmopsVnxo+ EBXc2FIgZrm2sds+UQ17GWlmCvxK6YHlNG8GTWJ6Cl8YDjywuH3EV2agqkMSCCvc LHO/Y5c4S3Y= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=subject :mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= sasl; b=GxQVsgkiD7HqFJf9fJiS/DTXwKxgFdssuh179IwXC9s0oxrBrLIbd6Gr QEF0kMx46gNRywgE800E/7sTYmD9gYzGAUtiiE+jddrt9BkuTB3ikmxthSriPE/X 4wP/09pEhO4kAhxaQ4GT06Wufw6hMge4bT1SRdB0K6tzha/FiQc= Received: from pb-sasl1.int.icgroup.com (unknown [127.0.0.1]) by pb-sasl1.pobox.com (Postfix) with ESMTP id 511F530006; Sun, 15 Feb 2015 04:27:13 -0500 (EST) Received: from almini.rcthomas.org (unknown [208.53.120.31]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by pb-sasl1.pobox.com (Postfix) with ESMTPSA id 4FE9239000; Sun, 15 Feb 2015 04:27:12 -0500 (EST) Subject: Re: How to adjust clock frequency in FreeBSD 10.1 ? Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: text/plain; charset=windows-1252 From: Rick Thomas In-Reply-To: Date: Sun, 15 Feb 2015 01:27:09 -0800 Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Adam Vande More X-Mailer: Apple Mail (2.1878.6) X-Pobox-Relay-ID: D2C791EE-B4F4-11E4-B91C-8FDD009B7A5A-02150157!pb-sasl1.pobox.com Cc: FreeBSD Questions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 15 Feb 2015 09:27:16 -0000 On Feb 14, 2015, at 4:50 AM, Adam Vande More = wrote: > Is there some other way to set the frequency? >>=20 >=20 > Sure, but I thought keeping accurate time was the goal? Indeed. And the machine is capable of doing that except for the problem = that the actual frequency is different from the frequency that the = kernel is assuming. Based on my experience with this machine using Linux, the actual = frequency is quite stable =97 certainly within the capability of ntp to = stabilize and maintain offsets of 10ms or less for extended periods. = But for some reason the actual frequency is about a percent or two off = from the frequency that the kernel wants to use. Under Linux, I can = tune that with adjtimex(8) setting TICK to an appropriate value. My = quest is to find out how to accomplish the same under FreeBSD. Your answer implies that there is a way to tune the frequency, but I = haven=92t found it yet. Any help will be appreciated. Thanks! Rick=