Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751233AbbLUIKO (ORCPT ); Mon, 21 Dec 2015 03:10:14 -0500 Received: from edison.jonmasters.org ([173.255.233.168]:57820 "EHLO edison.jonmasters.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750875AbbLUIKN (ORCPT ); Mon, 21 Dec 2015 03:10:13 -0500 Message-ID: <5677B3EB.9030908@jonmasters.org> Date: Mon, 21 Dec 2015 03:10:19 -0500 From: Jon Masters User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: John Stultz , Andy Lutomirski CC: "Brown, Len" , "linux-kernel@vger.kernel.org" , X86 ML , "Hunter, Adrian" References: <1A7043D5F58CCB44A599DFD55ED4C948469538F6@fmsmsx115.amr.corp.intel.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 74.92.29.237 X-SA-Exim-Mail-From: jonathan@jonmasters.org Subject: Re: Skylake (XPS 13 9350) TSC is way off X-SA-Exim-Version: 4.2.1 (built Sun, 08 Nov 2009 07:31:22 +0000) X-SA-Exim-Scanned: Yes (on edison.jonmasters.org) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 982 Lines: 24 On 12/2/15, 6:55 PM, John Stultz wrote: > On Wed, Dec 2, 2015 at 3:42 PM, Andy Lutomirski wrote: >>> On a hunch, are you running chrony instead of ntpd? >> >> Yes, this is indeed chrony. > > Ok. I'll have to look closer. The last time that message came up it > was in a report of a bug that chrony uncovered with the internal > correction being too slow. I know chrony is much more aggressive > compared to ntpd in tweaking the freq value for the initial converging > correction at startup, so maybe that along with something else is > causing us to get out of spec. Can you copy me on followup? I'm seeing similar behavior with chrony on recent kernels on a couple of different ARM server prototype systems. Jon. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/