Re: [LEAPSECS] Mechanism to provide tai-utc.dat locally

From: Poul-Henning Kamp <phk_at_phk.freebsd.dk>
Date: Thu, 28 Dec 2006 08:36:38 +0000

In message <7519944A-6834-4978-955E-18FEA07DDACF_at_semantic.org>, Ashley Yakeley
writes:
>On Dec 27, 2006, at 14:32, Poul-Henning Kamp wrote:
>
>>> It's impossible to accurately represent a millisecond using binary
>>> fractions. That would be unacceptable for most sub-second use.
>>
>> Reality check: with a 32bit fraction, the error would be 69 ps.
>
>...which accumulates in arithmetic and causes equality comparisons to
>fail. This should hold:

I seriously don't belive you do equality comparisons at the 1msec level
in real world software. Please provide examples.

--
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 28 2006 - 00:47:05 PST

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