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To: Andre Oppermann <andre@freebsd.org>
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In-Reply-To: Your message of "Fri, 21 Oct 2005 18:14:54 +0200."
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Date: Fri, 21 Oct 2005 19:10:07 +0200
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Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org,
	Bruce Evans <bde@zeta.org.au>
Subject: Re: Timekeeping [Was: Re: cvs commit: src/usr.bin/vmstat vmstat.c
	src/usr.bin/w w.c] 
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In message <435913FE.774C683D@freebsd.org>, Andre Oppermann writes:

>> Again, if you have been sitting in DDB, what exactly is the definition
>> of "uptime" ?
>
>IMO it's this:
>
> Uptime is the time the operating was available to present it's common
> services to userland.  That excludes any suspend and ddb times.  Single
> user mode however counts because the OS was servicing userland even if
> there was only one user.  Uptime is represented in SI seconds.

I can live with this definition.

So now we just need to be able to reliably measure the "not-uptime".

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@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.