From: Jesper Krogh <jesper@krogh.cc>
To: john stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Len Brown <len.brown@intel.com>
Subject: Re: Linux 2.6.29-rc6
Date: Wed, 04 Mar 2009 16:30:44 +0100 [thread overview]
Message-ID: <49AE9EA4.2080500@krogh.cc> (raw)
In-Reply-To: <1236118969.6068.87.camel@localhost>
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 <ntp server>
>
> 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
2.6.28.7 kernel".
04 Mar 14:59:16 offset: -0.139829 drift: -656.0 ppm
04 Mar 15:00:16 offset: -0.175233 drift: -591.147540984 ppm
04 Mar 15:01:16 offset: -0.210637 drift: -590.611570248 ppm
04 Mar 15:02:16 offset: -0.246033 drift: -590.386740331 ppm
04 Mar 15:03:17 offset: -0.28144 drift: -587.880165289 ppm
04 Mar 15:04:17 offset: -0.31684 drift: -588.301324503 ppm
04 Mar 15:05:17 offset: -0.352247 drift: -588.602209945 ppm
04 Mar 15:06:17 offset: -0.387649 drift: -588.805687204 ppm
04 Mar 15:07:17 offset: -0.423046 drift: -588.94813278 ppm
04 Mar 15:08:17 offset: -0.458451 drift: -589.073800738 ppm
04 Mar 15:09:18 offset: -0.493856 drift: -588.1973466 ppm
04 Mar 15:10:18 offset: -0.529265 drift: -588.374057315 ppm
04 Mar 15:11:18 offset: -0.564661 drift: -588.503457815 ppm
04 Mar 15:12:18 offset: -0.600063 drift: -588.620689655 ppm
04 Mar 15:13:18 offset: -0.635458 drift: -588.712930012 ppm
04 Mar 15:14:18 offset: -0.040699 drift: 109.052048726 ppm
04 Mar 15:15:18 offset: -0.076098 drift: 65.4984423676 ppm
04 Mar 15:16:18 offset: -0.111495 drift: 27.0557184751 ppm
04 Mar 15:17:18 offset: -0.146885 drift: -7.12096029548 ppm
04 Mar 15:18:19 offset: -0.182285 drift: -37.6853146853 ppm
04 Mar 15:19:19 offset: -0.217688 drift: -65.2117940199 ppm
04 Mar 15:20:19 offset: -0.253085 drift: -90.1202531646 ppm
04 Mar 15:21:19 offset: -0.288479 drift: -112.768882175 ppm
04 Mar 15:22:19 offset: -0.323866 drift: -133.448699422 ppm
04 Mar 15:23:19 offset: -0.359259 drift: -152.414127424 ppm
04 Mar 15:24:20 offset: -0.394648 drift: -169.750830565 ppm
04 Mar 15:25:20 offset: -0.430047 drift: -185.861980831 ppm
04 Mar 15:26:20 offset: -0.46544 drift: -200.779692308 ppm
04 Mar 15:27:20 offset: -0.500835 drift: -214.63620178 ppm
04 Mar 15:28:20 offset: -0.536221 drift: -227.534670487 ppm
04 Mar 15:29:20 offset: -0.571605 drift: -239.574515235 ppm
04 Mar 15:30:21 offset: -0.606992 drift: -250.706859593 ppm
04 Mar 15:31:21 offset: -0.64241 drift: -261.286085151 ppm
04 Mar 15:32:21 offset: -0.677792 drift: -271.20795569 ppm
04 Mar 15:33:21 offset: -0.713187 drift: -280.554252199 ppm
04 Mar 15:34:21 offset: -0.040744 drift: 46.7374169041 ppm
04 Mar 15:35:21 offset: -0.076145 drift: 29.0987996307 ppm
04 Mar 15:36:21 offset: -0.111551 drift: 12.4088050314 ppm
04 Mar 15:37:21 offset: -0.146952 drift: -3.40288713911 ppm
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
next prev parent reply other threads:[~2009-03-04 15:31 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-23 4:31 Linux 2.6.29-rc6 Linus Torvalds
2009-02-23 14:07 ` Linux 2.6.29-rc6 - Fix oops in i915_gem_retire_requests Karsten Wiese
2009-02-26 11:15 ` Linux 2.6.29-rc6 Jesper Krogh
2009-02-26 17:17 ` MTD_CK804XROM warning (Was: Linux 2.6.29-rc6) Marcin Slusarz
2009-02-26 17:53 ` Linux 2.6.29-rc6 Linus Torvalds
2009-02-26 19:22 ` David Woodhouse
2009-02-26 19:31 ` Jesper Krogh
2009-02-26 19:36 ` David Woodhouse
2009-02-26 19:46 ` Jesper Krogh
2009-02-26 19:49 ` David Woodhouse
2009-02-26 20:53 ` Carl-Daniel Hailfinger
2009-02-26 20:32 ` Linus Torvalds
2009-02-26 19:55 ` Jesper Krogh
2009-02-26 20:33 ` Linus Torvalds
2009-02-26 20:43 ` Jesper Krogh
2009-02-26 21:19 ` john stultz
2009-02-26 21:35 ` Jesper Krogh
2009-02-26 21:46 ` john stultz
2009-02-26 21:54 ` Thomas Gleixner
2009-02-26 22:04 ` Jesper Krogh
2009-02-27 6:30 ` Jesper Krogh
2009-03-01 13:51 ` Jesper Krogh
2009-02-26 21:49 ` Linus Torvalds
2009-03-01 15:04 ` Jesper Krogh
2009-02-26 21:54 ` john stultz
2009-02-26 22:06 ` Thomas Gleixner
2009-02-26 22:24 ` Linus Torvalds
2009-02-26 22:31 ` Linus Torvalds
2009-02-26 22:31 ` john stultz
2009-02-26 22:40 ` Linus Torvalds
2009-02-26 22:59 ` john stultz
2009-02-27 7:33 ` Ingo Molnar
2009-02-27 20:50 ` john stultz
2009-02-27 6:47 ` Jesper Krogh
2009-02-27 20:35 ` john stultz
2009-03-01 20:13 ` Jesper Krogh
2009-03-02 9:53 ` Jesper Krogh
2009-03-02 21:27 ` john stultz
2009-03-03 6:04 ` Jesper Krogh
2009-03-03 19:53 ` john stultz
2009-03-03 20:19 ` Jesper Krogh
2009-03-03 22:22 ` john stultz
2009-03-04 15:30 ` Jesper Krogh [this message]
2009-03-04 18:36 ` Jesper Krogh
2009-03-04 18:57 ` John Stultz
2009-03-05 2:39 ` john stultz
2009-03-05 2:52 ` john stultz
2009-03-05 8:43 ` Ingo Molnar
2009-03-06 3:13 ` john stultz
2009-03-06 3:54 ` john stultz
2009-03-06 11:34 ` Ingo Molnar
2009-03-09 20:42 ` Jesper Krogh
2009-03-10 4:26 ` Linus Torvalds
2009-03-10 11:29 ` Thomas Gleixner
2009-03-10 19:42 ` Jesper Krogh
2009-03-10 22:22 ` Thomas Gleixner
2009-03-15 19:53 ` Jesper Krogh
2009-03-16 18:40 ` Jesper Krogh
2009-03-15 1:19 ` Linus Torvalds
2009-03-15 15:44 ` Jesper Krogh
2009-03-15 18:09 ` Linus Torvalds
2009-03-15 18:38 ` Jesper Krogh
2009-03-15 19:02 ` Linus Torvalds
2009-03-15 19:52 ` Jesper Krogh
2009-03-16 18:59 ` Jesper Krogh
2009-03-16 19:32 ` Linus Torvalds
2009-03-17 1:43 ` john stultz
2009-03-17 8:14 ` Ingo Molnar
2009-03-17 15:48 ` Linus Torvalds
2009-03-17 16:13 ` Ingo Molnar
2009-03-17 16:28 ` Linus Torvalds
2009-03-17 16:40 ` Ingo Molnar
2009-03-17 17:28 ` Olivier Galibert
2009-03-21 9:11 ` Jesper Krogh
2009-03-21 10:06 ` Ingo Molnar
2009-03-15 20:32 ` Linus Torvalds
2009-03-03 20:39 ` Jesper Krogh
2009-03-03 22:16 ` john stultz
2009-03-04 5:36 ` Jesper Krogh
2009-03-01 15:09 ` Jesper Krogh
2009-03-01 15:44 ` Linux 2.6.29-rc6 (clocksource) Sitsofe Wheeler
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