Re: [LEAPSECS] Software requirements

From: Poul-Henning Kamp <>
Date: Thu, 22 Dec 2005 16:34:23 +0100

In message <>, "Daniel R. Tobias" writes:
>On 21 Dec 2005 at 21:33, Poul-Henning Kamp wrote:

>I suspect more "real world" computers are in roughly this situation
>as opposed to being absolutely dependent on being correct to the
>millisecond or microsecond at all times; the system clocks of
>practically all computers are just not sufficiently accurate for
>that. If computers start having an actual atomic clock on board,
>maybe things will be different.

The trick is how you efficiently and precisely determine which
computers do and which do not need to cope correctly with leapseconds,
and subsequently, how you determine which of the ones that need to,
will do so.

Y2K has shown us that "just ask people" is so far from the correct
solution that it is almost better as a negative indication.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk_at_FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
Received on Thu Dec 22 2005 - 07:45:24 PST

This archive was generated by hypermail 2.3.0 : Sat Sep 04 2010 - 09:44:54 PDT