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Date:      Fri, 3 Jan 2003 09:04:40 +0000 (GMT Standard Time)
From:      Stephen Hildrey <steve@uptime.org.uk>
To:        FreeBSD Stable <freebsd-stable@freebsd.org>
Subject:   Re: FreeBSD Stability
Message-ID:  <Mahogany-0.64.2-968-20030103-090440.00@localhost>
In-Reply-To: <20030103195010.D73262-100000@starbug.ugh.net.au>
References:  <20030103195010.D73262-100000@starbug.ugh.net.au>

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On Fri, 3 Jan 2003 19:51:14 +1100 (EST) Andrew <andrew@ugh.net.au> wrote:
> On Fri, 3 Jan 2003, Gunnar Flygt wrote:
> 
> > Strange, I do not see this behaviour on one of our Solaris boxes:
> >
> > Sun Microsystems Inc.   SunOS 5.5.1     Generic May 1996
> > bash-2.00# uptime
> >   9:05am  up 1102 day(s), 15:42,  1 user,  load average: 0.07,
> 0.02, 0.02
> 
> I think they mean that the uptime, as detected by netcraft, rolls
> over.

Linux uptimes do indeed rollover after 497 days due to the uptime being
stored as a 32bit number of jiffies (IIRC). The maths is something like:
a jiffy is 1/100th of a second, so ((2^32)/100)/(24*60*60) = 497.

Steve


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