From: David Lang <dlang@diginsite.com>
To: Andrej Presern <andrejp@luz.fe.uni-lj.si>
Cc: majordomo@vger.rutgers.edu,
Ulrich Windl <ulrich.windl@rz.uni-regensburg.de>,
linux-kernel@vger.rutgers.edu
Subject: Re: GPS Leap Second Scheduled!
Date: Wed, 9 Sep 1998 09:35:59 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.03.9809090934220.7567-100000@dlang> (raw)
In-Reply-To: <98090822315400.00819@soda>
-----BEGIN PGP SIGNED MESSAGE-----
I am probably missing something, but can't you just ignore the leap second
until you discover that the time is 1 sec off and then use the normal NTP
procedure to get back to the exact time
David Lang
On Tue, 8 Sep 1998, Andrej Presern wrote:
> Date: Tue, 8 Sep 1998 22:27:28 +0200
> From: Andrej Presern <andrejp@luz.fe.uni-lj.si>
> To: majordomo@vger.rutgers.edu,
Ulrich Windl <ulrich.windl@rz.uni-regensburg.de>
> Cc: linux-kernel@vger.rutgers.edu
> Subject: Re: GPS Leap Second Scheduled!
>
> On Mon, 07 Sep 1998, Ulrich Windl wrote:
> >(...About leap second handling in the Linux kernel...)
> >On 1 Sep 98, at 11:16, Sven Dietrich wrote:
> >> The GPS control segment has posted a leap second warning for week number
> >> 990, Day number 5, and thus it's official in GPS world,
> >> that the leap second will take place 12/31/98...
> >>
> >> I am going to run simulations on NTP 3 & 4 and Linux with that GPS almanac.
> >> Will send bug fixes and patches as needed for the Trimble refclocks and
> >> NTP...
> >>
> >> Linux currently inserts a 2nd 59th second, instead of the UTC model of ...
> >> 58, 59, 60...
> >
> >The time in the kernel is seconds since the epoch. To insert a second
> >means that we'll have to delay the next second for another second.
> >The other solution seems to be a clib -> kernel interface that knows
> >that a leap second is active now. Then the clib could possibly
> >convert the seconds to xx:yy:60. (I hope I did not overlook something
> >obvious).
>
> Have you considered simply not scheduling any processes for one second and
> adjusting the time accordingly? (if one second chunk is too big, you can do it
> in several steps)
>
> Andrej
>
> --
> Andrej Presern, andrejp@luz.fe.uni-lj.si
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.rutgers.edu
> Please read the FAQ at http://www.tux.org/lkml/faq.html
>
-----BEGIN PGP SIGNATURE-----
Version: PGP for Personal Privacy 5.0
Charset: noconv
iQEVAwUBNfaucj7msCGEppcbAQGFkQf/WSuUbkLPd2sfQ99FgjoOcRox47ZUV6rr
c6Yj6rfIhMXpCqzRcqyNa7JS3mTK+8Z3/9Pu1WbEU/MdZrgvvorCyq9k795V8tr6
GX2EqEoVt87uhAiBRdzMi9XREsWi8hTK/yr0RRAQKhP/bLcGvjcrmDvlUR6fEBic
jo026QXPYN4mIhyf6kIyXBmrh9dOr9EFvYYz7Lr13nwa9NjA5tlOOoSDDmG8tobz
hmgRcSE93OJgoVDwOwUcgC2thH6x0MBMYCfp/c2TWQ9cYaI4dVTlEeJWKjQTTp2I
hDsW/RjLWycR5k7PnRV002Lm6+Dxxl/ajwINgpm0S52qDJleAo+eUw==
=pxxv
-----END PGP SIGNATURE-----
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/faq.html
next prev parent reply other threads:[~1998-09-09 15:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <299BBE59294E@rkdvmks1.ngate.uni-regensburg.de>
[not found] ` <98090822315400.00819@soda>
1998-09-09 0:59 ` H. Peter Anvin
1998-09-09 8:00 ` Chris Wedgwood
[not found] ` <199809092149.RAA06993@hilfy.ece.cmu.edu>
1998-09-10 1:37 ` H. Peter Anvin
1998-09-10 15:05 ` Theodore Y. Ts'o
1998-09-12 19:57 ` Feuer
1998-09-09 16:35 ` David Lang [this message]
[not found] <19980914165757.A17479@tantalophile.demon.co.uk>
[not found] ` <199809150603.XAA29073@cesium.transmeta.com>
[not found] ` <19980915100729.02790@albireo.ucw.cz>
[not found] ` <35FF1838.6E247F0C@his.com>
1998-09-17 11:51 ` Jan Echternach
1998-09-11 22:49 Ethan O'Connor
[not found] <no.id>
1998-09-10 6:34 ` Jamie Lokier
1998-09-11 6:18 ` Michael Shields
-- strict thread matches above, loose matches on Subject: below --
1998-09-09 20:13 Colin Plumb
1998-09-09 23:45 ` Chris Wedgwood
1998-09-09 23:55 ` Chris Wedgwood
1998-09-10 8:36 ` Rogier Wolff
1998-09-10 17:05 ` Oliver Xymoron
1998-09-10 22:02 ` Ryan Moore
1998-09-09 4:46 Colin Plumb
1998-09-09 19:08 ` Theodore Y. Ts'o
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=Pine.LNX.4.03.9809090934220.7567-100000@dlang \
--to=dlang@diginsite.com \
--cc=andrejp@luz.fe.uni-lj.si \
--cc=linux-kernel@vger.rutgers.edu \
--cc=majordomo@vger.rutgers.edu \
--cc=ulrich.windl@rz.uni-regensburg.de \
/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
all inboxes | Powered by JetHome®