From owner-freebsd-hackers@FreeBSD.ORG Thu Jul 8 13:39:55 2004 Return-Path: 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 3A4D316A4CE; Thu, 8 Jul 2004 13:39:55 +0000 (GMT) Received: from smtp-out5.xs4all.nl (smtp-out5.xs4all.nl [194.109.24.6]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8A28F43D5F; Thu, 8 Jul 2004 13:39:54 +0000 (GMT) (envelope-from wkb@freebie.xs4all.nl) Received: from freebie.xs4all.nl (freebie.xs4all.nl [213.84.32.253]) by smtp-out5.xs4all.nl (8.12.10/8.12.10) with ESMTP id i68DdpUY089546; Thu, 8 Jul 2004 15:39:52 +0200 (CEST) Received: from freebie.xs4all.nl (localhost [127.0.0.1]) by freebie.xs4all.nl (8.12.11/8.12.9) with ESMTP id i68DdpXs067684; Thu, 8 Jul 2004 15:39:51 +0200 (CEST) (envelope-from wkb@freebie.xs4all.nl) Received: (from wkb@localhost) by freebie.xs4all.nl (8.12.11/8.12.11/Submit) id i68Ddp5R067683; Thu, 8 Jul 2004 15:39:51 +0200 (CEST) (envelope-from wkb) Date: Thu, 8 Jul 2004 15:39:51 +0200 From: Wilko Bulte To: Avleen Vig Message-ID: <20040708133951.GA67667@freebie.xs4all.nl> References: <20040706120130.3DF9816A57D@hub.freebsd.org> <40EB9A46.2050409@trio.plala.or.jp> <20040708034845.GA59801@VARK.homeunix.com> <20040708033741.E28518@bowser.eecs.harvard.edu> <20040708082304.GE5238@silverwraith.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040708082304.GE5238@silverwraith.com> User-Agent: Mutt/1.4.1i X-OS: FreeBSD 4.10-STABLE X-PGP: finger wilko@freebsd.org X-Mailman-Approved-At: Fri, 09 Jul 2004 11:59:52 +0000 cc: freebsd-hackers@FreeBSD.ORG cc: David Schultz cc: Daniel Ellard 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Jul 2004 13:39:55 -0000 On Thu, Jul 08, 2004 at 01:23:04AM -0700, Avleen Vig wrote: > On Thu, Jul 08, 2004 at 03:46:24AM -0400, Daniel Ellard wrote: > > I don't doubt that DTrace took a long time to do. However, in most > > projects the design phase consumes a lot of time, and it is often the > > case that unforeseen problems or changes in the feature set cost the > > developers a lot of time. So while it might have taken six years to > > write DTrace the first time, I suspect it would take a fraction of > > that time to re-implement. (It certainly might be longer than "a few > > months" and I'm not going to quibble. We won't know the precise > > number until someone does the port.) > > They said "6 staff-years". This means if they have 6 people working on > it full time, it took 1 year to complete. If they had 60 people full > time, it took just over 5 weeks (technically, i doubt that would work > practically). It works about as well as having 3 women deliver a baby in 3 months. -- Wilko Bulte wilko@FreeBSD.org