From owner-freebsd-hackers@FreeBSD.ORG  Tue Jul 13 07:17:26 2004
Return-Path: <owner-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 39AE116A4CE
	for <freebsd-hackers@freebsd.org>;
	Tue, 13 Jul 2004 07:17:26 +0000 (GMT)
Received: from smtp.des.no (flood.des.no [217.116.83.31])
	by mx1.FreeBSD.org (Postfix) with ESMTP id F213443D5D
	for <freebsd-hackers@freebsd.org>;
	Tue, 13 Jul 2004 07:17:25 +0000 (GMT)	(envelope-from des@des.no)
Received: by smtp.des.no (Pony Express, from userid 666)
	id BF33C530C; Tue, 13 Jul 2004 09:17:24 +0200 (CEST)
Received: from dwp.des.no (des.no [80.203.228.37])
	by smtp.des.no (Pony Express) with ESMTP id 1E3805308;
	Tue, 13 Jul 2004 09:17:19 +0200 (CEST)
Received: by dwp.des.no (Postfix, from userid 2602)
	id C26BBB85E; Tue, 13 Jul 2004 09:17:18 +0200 (CEST)
To: Steven Smith <sos22@cantab.net>
References: <1089501790.00086820.1089489001@10.7.7.3>
	<20040712115134.D6C3F14F@pm514-9.comsys.ntu-kpi.kiev.ua>
	<20040712180933.GA1093@archibold.chu.cam.ac.uk>
From: des@des.no (=?iso-8859-1?q?Dag-Erling_Sm=F8rgrav?=)
Date: Tue, 13 Jul 2004 09:17:18 +0200
In-Reply-To: <20040712180933.GA1093@archibold.chu.cam.ac.uk> (Steven Smith's
 message of "Mon, 12 Jul 2004 19:09:33 +0100")
Message-ID: <xzp3c3wgyv5.fsf@dwp.des.no>
User-Agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (berkeley-unix)
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on flood.des.no
X-Spam-Level: 
X-Spam-Status: No, hits=0.5 required=5.0 tests=AWL,MAILTO_TO_SPAM_ADDR 
	autolearn=no version=2.63
cc: freebsd-hackers@freebsd.org
cc: sos22@srcf.ucam.org
Subject: Re: Article on Sun's DTrace
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
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: Tue, 13 Jul 2004 07:17:26 -0000

Steven Smith <sos22@cantab.net> writes:
> I don't know enough about Sparcs to even speculate how it's done
> there.

The UltraSparc is a RISC processor, which amongst other things implies
constant instruction size.  Memory barriers take care of any cache
coherence issues that may arise.

DES
--=20
Dag-Erling Sm=F8rgrav - des@des.no