From owner-freebsd-hackers@FreeBSD.ORG  Wed Sep  6 23:08:31 2006
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id A13C516A4DD
	for <freebsd-hackers@freebsd.org>; Wed,  6 Sep 2006 23:08:31 +0000 (UTC)
	(envelope-from prvs=julian=39777be4f@elischer.org)
Received: from a50.ironport.com (a50.ironport.com [63.251.108.112])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 65A9C43D86
	for <freebsd-hackers@freebsd.org>; Wed,  6 Sep 2006 23:08:31 +0000 (GMT)
	(envelope-from prvs=julian=39777be4f@elischer.org)
Received: from unknown (HELO [10.251.18.229]) ([10.251.18.229])
	by a50.ironport.com with ESMTP; 06 Sep 2006 16:08:31 -0700
Message-ID: <44FF54EF.9030806@elischer.org>
Date: Wed, 06 Sep 2006 16:08:31 -0700
From: Julian Elischer <julian@elischer.org>
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US;
	rv:1.7.13) Gecko/20060414
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Eder <ederbs.hackers@gmail.com>
References: <2699850609061520wad7f0f2s7b402fb7789336ff@mail.gmail.com>
In-Reply-To: <2699850609061520wad7f0f2s7b402fb7789336ff@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
Subject: Re: The nature of kernel of the FreeBSD
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 06 Sep 2006 23:08:31 -0000

Eder wrote:

> A doubt,
>
> Kernel of the FreeBSD is monolithic, correct !!!
>
> The MacOS is derived from kernel of the FreeBSD, correct !!!

no, wrong.

The MacOS kernel is "related distantly" to the FreeBSD kernel.
It has been derived from MACH 3 and MACH 2.5  which themselves had SOME 
components
derived from BSD4.3. Some of these components have been updated to the 
equivalent
companents from modern BSD systems and BSD4.4 in turn borrowed the VM system
from MACH. So, they are related but not in a parent/child manner.  MacOS 
has been designed
and evolved with a very different set of goals from FreeBSD, so many 
different tradeoffs
have been made along the way. They have very different behaviour 
characteristics.

>
> It would like to understand because the performance of a MacOS as serving
> it is very inferior of what a FreeBSD server, being that the MacOS is
> derived
> from kernel of the FreeBSD.
>
> It will be that somebody could explain this better to me.
>
> Thanks,
>
> Ederson de Moura