X-Spam-Check-By:	sourceware.org
Date:	Fri, 16 Feb 2007 04:12:31 +0300
From:	Andrew Makhorin <mao AT gnu DOT org>
X-Mailer:	The Bat! (v2.0 Beta/1) Personal
Reply-To:	Andrew Makhorin <mao AT gnu DOT org>
Message-ID:	<106982500.20070216041231@gnu.org>
To:	"Cary Jamison" <Cary_Jamison AT Symantec DOT com>
CC:	cygwin AT cygwin DOT com
Subject:	Re: strange bug in gettimeofday function
In-Reply-To:	<er2v5b$nmj$1@sea.gmane.org>
References:	<13811889795 DOT 20070215071733 AT gnu DOT org> <er2v5b$nmj$1 AT sea DOT gmane DOT org>
MIME-Version:	1.0
X-detected-kernel:	Error: This connection is not (no longer?) in the cache.
X-IsSubscribed:	yes
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Unsubscribe:	<mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com

> I would be suspicious of floating-point rounding errors here for the
> original problem you described.  Why don't you try a test case that just 
> checks if one tv is ever less than a previous tv, without the conversions.

Because I could not reproduce the bug concerning gettimeofday out of
a complex program where it is used. Probably it works correctly. But
then I would like to know why comparison of two floating-point numbers
leads to different results: t0 is *exactly* the same as t1, nevertheless
the condition t0 > t1 is true (sometimes). That is the question.



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -