From owner-freebsd-hackers@FreeBSD.ORG  Mon Jul  5 13:32:07 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 F235A16A4CE
	for <freebsd-hackers@freebsd.org>;
	Mon,  5 Jul 2004 13:32:07 +0000 (GMT)
Received: from atlas.informatik.rwth-aachen.de
	(atlas.informatik.RWTH-Aachen.DE [137.226.194.2])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 3CE0443D3F
	for <freebsd-hackers@freebsd.org>;
	Mon,  5 Jul 2004 13:32:07 +0000 (GMT)
	(envelope-from stolz@i2.informatik.rwth-aachen.de)
Received: from menelaos.informatik.rwth-aachen.de
	(menelaos.informatik.RWTH-Aachen.DE [137.226.194.73])
	8.11.1-0.5-michaelw-20030918) with ESMTP id i65DW5k32384;
	Mon, 5 Jul 2004 15:32:05 +0200
Received: (from stolz@localhost)i65DW5C8075350;
	Mon, 5 Jul 2004 15:32:05 +0200 (CEST)	(envelope-from stolz)
Date: Mon, 5 Jul 2004 15:32:03 +0200
From: Volker Stolz <vs@freebsd.org>
To: Eitarou Kamo <e-kamo@trio.plala.or.jp>
Message-ID: <20040705133203.GA75345@i2.informatik.rwth-aachen.de>
References: <20040630011635.GF34501@empiric.dek.spc.org>
	<20040705103747.GA20487@VARK.homeunix.com> <40E95653.6020705@trio.plala.or.jp>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-15
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <40E95653.6020705@trio.plala.or.jp>
X-PGP-Key: finger vs@foldr.org
X-PGP-Id: 0x3FD1B6B5
User-Agent: Mutt/1.5.4i
cc: freebsd-hackers@freebsd.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: Mon, 05 Jul 2004 13:32:08 -0000

In local.freebsd-hackers, you wrote:
> I haven't seen above well yet. But A article says that DTrace sounds
> like 30,000 lines of debug print. 

No, already the first article tells you that they use a VM with byte-code
for the C-like language "D". And it's not compiled into the kernel but
hooked in and removed on-the-fly.

Volker
-- 
http://www-i2.informatik.rwth-aachen.de/stolz/ *** PGP *** S/MIME
Neu! Ändern Sie den Anfangstag Ihrer Woche