From: "George Spelvin" <linux@horizon.com>
To: johnstul@us.ibm.com, linux@horizon.com
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de,
ulrich.windl@rz.uni-regensburg.de, williams@redhat.com,
zippel@linux-m68k.org
Subject: Re: [RFC][PATCH] tsc_khz= boot option to avoid TSC calibration variance
Date: 11 May 2009 02:54:24 -0400 [thread overview]
Message-ID: <20090511065424.25138.qmail@science.horizon.com> (raw)
In-Reply-To: <1241809372.7297.3.camel@localhost.localdomain>
Just as a data point, I have this patch running on two PPS-synced
NTP servers with apparent success. After thinking through the sign
conventions carefully, (if NTP reports a that it is applying a positive
clock frequency adjustment, the TSC frequency should be reduced by that
amount), I now have the NTP frequency offset within a couple PPM of 0.
Thanks for the patch!
prev parent reply other threads:[~2009-05-11 6:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-08 0:30 [RFC][PATCH] tsc_khz= boot option to avoid TSC calibration variance john stultz
2009-05-08 12:15 ` Ingo Molnar
2009-05-08 15:12 ` George Spelvin
2009-05-08 19:06 ` [RFC][PATCH] tsc_khz= boot option to avoid TSC calibrationvariance john stultz
2009-05-08 12:19 ` [RFC][PATCH] tsc_khz= boot option to avoid TSC calibration variance George Spelvin
2009-05-08 15:27 ` George Spelvin
2009-05-08 19:02 ` john stultz
2009-05-11 6:54 ` George Spelvin [this message]
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=20090511065424.25138.qmail@science.horizon.com \
--to=linux@horizon.com \
--cc=johnstul@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
--cc=ulrich.windl@rz.uni-regensburg.de \
--cc=williams@redhat.com \
--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