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To: Scott Long <scottl@samsco.org>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 25 Jan 2006 14:37:43 MST."
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Date: Wed, 25 Jan 2006 23:09:28 +0100
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Cc: Peter Jeremy <PeterJeremy@optushome.com.au>, current@freebsd.org,
	arch@freebsd.org
Subject: Re: [TEST/REVIEW] CPU accounting patches 
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In message <43D7EFA7.2060309@samsco.org>, Scott Long writes:

>Regardless of the technical merits of one accounting method or another,
>changing the results of rusage is going to result in many years of
>questions to the mailing lists and grumbling from uneducated sysadmins
>that FreeBSD is somehow inferior because of this one detail.  I know
>that's an emotional argument and not a technical one, but it's also
>important to consider.

Well, there is up to 30% improvement in contextswitches to pay for
the grumbling.

I think more people care about context switches than cpu accounting,
but I also think they may not know this.

-- 
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.