From: john stultz <johnstul@us.ibm.com>
To: Frank Sorenson <frank@tuxrocks.com>
Cc: lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Darren Hart <dvhltc@us.ibm.com>,
Nishanth Aravamudan <nacc@us.ibm.com>,
George Anzinger <george@mvista.com>,
Roman Zippel <zippel@linux-m68k.org>,
Ulrich Windl <ulrich.windl@rz.uni-regensburg.de>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 0/13] Time: Generic Timeofday Subsystem (v B10)
Date: Tue, 15 Nov 2005 11:53:34 -0800 [thread overview]
Message-ID: <1132084415.2906.12.camel@leatherman> (raw)
In-Reply-To: <43796C76.8070603@tuxrocks.com>
On Mon, 2005-11-14 at 22:04 -0700, Frank Sorenson wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> john stultz wrote:
> > Hrm.. How about sending a dmesg of just vanilla 2.6.14-mm2? Also does
> > the behavior change booting w/ idle=poll ?
>
> idle=poll does seem to fix the major clock drift problem. There may
> still be an issue, but it's much smaller:
>
> 2.6.14-mm2-todb10:
> 14 Nov 21:50:57 offset: -0.025373 drift: -22404.0 ppm
> 14 Nov 21:51:59 offset: -1.577053 drift: -24985.4603175 ppm
> 14 Nov 21:53:00 offset: -3.104569 drift: -25012.9032258 ppm
>
> 2.6.14-mm2-todb10 with idle=poll:
> 14 Nov 21:37:59 offset: 5.9e-05 drift: 63.0 ppm
> 14 Nov 21:39:00 offset: 0.003207 drift: 51.7903225806 ppm
Hmm. It seems the c3 compensation is triggering when it shouldn't, or
maybe its over compensating.
I can't reproduce it on my laptop. Do you recall if in previous tests
you saw anything like this? I'm trying to narrow down if its just a
difference in hardware or if something in the c3 idle code changed.
thanks
-john
next prev parent reply other threads:[~2005-11-15 19:53 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-12 4:48 [PATCH 0/13] Time: Generic Timeofday Subsystem (v B10) john stultz
2005-11-12 4:48 ` [PATCH 1/13] Time: Reduced NTP rework (part 1) john stultz
2005-11-12 4:49 ` [PATCH 2/13] Time: Reduced NTP Rework (part 2) john stultz
2005-11-12 4:49 ` [PATCH 3/13] Time: Clocksource Infrastructure john stultz
2005-11-12 4:49 ` [PATCH 4/13] Time: Generic Timekeeping Infrastructure john stultz
2005-11-12 4:49 ` [PATCH 5/13] Time: i386 Conversion - part 1: Move timer_pit.c to i8253.c john stultz
2005-11-12 4:49 ` [PATCH 6/13] Time: i386 Conversion - part 2: Move timer_tsc.c to tsc.c john stultz
2005-11-12 4:49 ` [PATCH 7/13] Time: i386 Conversion - part 3: Rework TSC Support john stultz
2005-11-12 4:49 ` [PATCH 8/13] Time: i386 Conversion - part 4: ACPI PM variable renaming john stultz
2005-11-12 4:49 ` [PATCH 9/13] Time: i386 Conversion - part 5: Enable Generic Timekeeping john stultz
2005-11-12 4:49 ` [PATCH 10/13] Time: i386 Conversion - part 6: Remove Old Code john stultz
2005-11-12 4:50 ` [PATCH 11/13] Time: x86-64 Conversion to Generic Timekeeping john stultz
2005-11-12 4:50 ` [PATCH 12/13] Time: i386/x86-64 Clocksource Drivers john stultz
2005-11-12 4:50 ` [PATCH 13/13] Time: Generic Timekeeping Paraniod Debug Patch john stultz
2005-11-13 1:24 ` [PATCH 0/13] Time: Generic Timeofday Subsystem (v B10) Andi Kleen
2005-11-13 2:34 ` john stultz
2005-11-13 7:32 ` Ingo Molnar
2005-11-13 10:53 ` Andi Kleen
2005-11-14 17:41 ` john stultz
2005-11-14 18:23 ` Ingo Molnar
2005-11-14 21:22 ` Frank Sorenson
2005-11-14 21:38 ` john stultz
2005-11-14 21:53 ` Frank Sorenson
2005-11-14 22:02 ` john stultz
2005-11-14 23:07 ` Frank Sorenson
2005-11-14 23:25 ` john stultz
2005-11-15 5:04 ` Frank Sorenson
2005-11-15 19:53 ` john stultz [this message]
2005-11-15 20:53 ` Ingo Molnar
2005-11-15 21:04 ` john stultz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1132084415.2906.12.camel@leatherman \
--to=johnstul@us.ibm.com \
--cc=dvhltc@us.ibm.com \
--cc=frank@tuxrocks.com \
--cc=george@mvista.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=nacc@us.ibm.com \
--cc=tglx@linutronix.de \
--cc=ulrich.windl@rz.uni-regensburg.de \
--cc=zippel@linux-m68k.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox