Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757957AbbLBXmg (ORCPT ); Wed, 2 Dec 2015 18:42:36 -0500 Received: from mail-yk0-f179.google.com ([209.85.160.179]:35205 "EHLO mail-yk0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757809AbbLBXmf (ORCPT ); Wed, 2 Dec 2015 18:42:35 -0500 MIME-Version: 1.0 In-Reply-To: References: <1A7043D5F58CCB44A599DFD55ED4C948469538F6@fmsmsx115.amr.corp.intel.com> Date: Wed, 2 Dec 2015 15:42:34 -0800 Message-ID: Subject: Re: Skylake (XPS 13 9350) TSC is way off From: John Stultz To: Andy Lutomirski Cc: "Brown, Len" , "linux-kernel@vger.kernel.org" , X86 ML , "Hunter, Adrian" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1160 Lines: 32 On Wed, Dec 2, 2015 at 3:38 PM, John Stultz wrote: > On Wed, Dec 2, 2015 at 3:25 PM, Andy Lutomirski wrote: >> In case it's at all useful, adjtimex -p says: >> >> mode: 0 >> offset: 0 >> frequency: 135641 >> maxerror: 37498 >> esterror: 1532 >> status: 8192 >> time_constant: 2 >> precision: 1 >> tolerance: 32768000 >> tick: 10000 >> raw time: 1449098317s 671243180us = 1449098317.671243180 >> >> this suggests a rather small correction, so I really have no idea what >> "Adjusting tsc more than 11% (8039115 vs 7759462)" means. >> >> John, you wrote this code. What does the error message mean? Also, is there a behavior issue you're seeing or is this just a concern about the warning? I assumed it was the first, but digging up the thread here I'm not sure I see any specific problems listed. thanks -john -- 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/