Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757170AbZCDShV (ORCPT ); Wed, 4 Mar 2009 13:37:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755205AbZCDShH (ORCPT ); Wed, 4 Mar 2009 13:37:07 -0500 Received: from 2605ds1-ynoe.1.fullrate.dk ([90.184.12.24]:47785 "EHLO shrek.krogh.cc" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754935AbZCDShG (ORCPT ); Wed, 4 Mar 2009 13:37:06 -0500 Message-ID: <49AECA3B.5030503@krogh.cc> Date: Wed, 04 Mar 2009 19:36:43 +0100 From: Jesper Krogh User-Agent: Thunderbird 2.0.0.19 (X11/20090105) MIME-Version: 1.0 To: john stultz CC: Thomas Gleixner , Linus Torvalds , Linux Kernel Mailing List , Len Brown Subject: Re: Linux 2.6.29-rc6 References: <49A6F39F.9040801@krogh.cc> <49A6FEE2.90700@krogh.cc> <1f1b08da0902261319k7a60d80xaafc1101facfd2d9@mail.gmail.com> <49A70B24.6090706@krogh.cc> <1235685269.6811.11.camel@localhost.localdomain> <1235687483.6811.26.camel@localhost.localdomain> <49A78C79.304@krogh.cc> <1235766936.7402.5.camel@localhost.localdomain> <49ABACA0.3090300@krogh.cc> <1236029277.7756.0.camel@localhost.localdomain> <49ACC853.8070205@krogh.cc> <1236110026.6068.18.camel@localhost> <49AD90E2.7050209@krogh.cc> <1236118969.6068.87.camel@localhost> <49AE9EA4.2080500@krogh.cc> In-Reply-To: <49AE9EA4.2080500@krogh.cc> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2840 Lines: 60 Jesper Krogh wrote: > john stultz wrote: >> I guess something to test my idea above (that the drift is bad enough >> that NTPd isn't making slew adjustments via adjtimex offset) is to >> remove NTPd from the init.d startup. >> >> Then after rebooting (into 2.6.29), run the attached python script for >> 10 minutes or so to get an idea of the ppm drift. Then repeat with >> 2.6.26. >> >> To run: ./drift-test.py >> >> It will give some wild ppm numbers, but after a few minutes it should >> settle down to the "natural drift" of the system. > > Ok. I removed ntpd from the system... heres is from "non-working Updated. I think I has NTPd running in the former "non-working" test. I just tried to reproduce the numbers, and they look like this (reproducible on 2.6.29-rc6). jk@quad12:~$ python drift-test.py 10.192.96.19 04 Mar 19:27:10 offset: -0.157696 drift: -693.0 ppm 04 Mar 19:28:10 offset: -0.195134 drift: -625.098360656 ppm 04 Mar 19:29:10 offset: -0.232579 drift: -624.595041322 ppm 04 Mar 19:30:10 offset: -0.270021 drift: -624.408839779 ppm 04 Mar 19:31:11 offset: -0.307461 drift: -621.727272727 ppm 04 Mar 19:32:11 offset: -0.344903 drift: -622.185430464 ppm 04 Mar 19:33:11 offset: -0.382345 drift: -622.491712707 ppm 04 Mar 19:34:11 offset: -0.419794 drift: -622.727488152 ppm 04 Mar 19:35:11 offset: -0.457239 drift: -622.89626556 ppm Still the same. > And from working 2.6.27.19 kernel. > > jk@quad12:~$ python drift-test.py 10.192.96.19 > 04 Mar 16:17:23 offset: -0.006929 drift: -62.0 ppm > 04 Mar 16:18:24 offset: -0.010252 drift: -54.5967741935 ppm > 04 Mar 16:19:24 offset: -0.013574 drift: -54.9754098361 ppm > 04 Mar 16:20:24 offset: -0.016897 drift: -55.1098901099 ppm > 04 Mar 16:21:24 offset: -0.020233 drift: -55.2314049587 ppm > 04 Mar 16:22:24 offset: -0.023566 drift: -55.2947019868 ppm > 04 Mar 16:23:24 offset: -0.026895 drift: -55.3259668508 ppm > 04 Mar 16:24:24 offset: -0.030217 drift: -55.3317535545 ppm > 04 Mar 16:25:24 offset: -0.033539 drift: -55.3360995851 ppm > 04 Mar 16:26:24 offset: -0.036865 drift: -55.3468634686 ppm > 04 Mar 16:27:25 offset: -0.038266 drift: -52.0713101161 ppm > 04 Mar 16:28:25 offset: -0.039747 drift: -49.592760181 ppm > 04 Mar 16:29:25 offset: -0.041331 drift: -47.6680497925 ppm -- Jesper -- 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/