From owner-freebsd-hackers@FreeBSD.ORG Thu Sep 14 21:22:21 2006 Return-Path: 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 59DD416A403 for ; Thu, 14 Sep 2006 21:22:21 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (tim.des.no [194.63.250.121]) by mx1.FreeBSD.org (Postfix) with ESMTP id BFB4D43D69 for ; Thu, 14 Sep 2006 21:22:20 +0000 (GMT) (envelope-from des@des.no) Received: from tim.des.no (localhost [127.0.0.1]) by spam.des.no (Postfix) with ESMTP id 42C54208C; Thu, 14 Sep 2006 23:22:16 +0200 (CEST) X-Spam-Tests: AWL X-Spam-Learn: disabled X-Spam-Score: 0.0/3.0 X-Spam-Checker-Version: SpamAssassin 3.1.4 (2006-07-25) on tim.des.no Received: from dwp.des.no (des.no [80.203.243.180]) by tim.des.no (Postfix) with ESMTP id 283972086; Thu, 14 Sep 2006 23:22:16 +0200 (CEST) Received: by dwp.des.no (Postfix, from userid 1001) id EC586B85E; Thu, 14 Sep 2006 23:22:15 +0200 (CEST) From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=) To: Gary Corcoran References: <863bauk3gp.fsf@dwp.des.no> <45099123.4000500@rcn.com> Date: Thu, 14 Sep 2006 23:22:15 +0200 In-Reply-To: <45099123.4000500@rcn.com> (Gary Corcoran's message of "Thu, 14 Sep 2006 13:28:03 -0400") Message-ID: <86lkomw3co.fsf@dwp.des.no> User-Agent: Gnus/5.110004 (No Gnus v0.4) Emacs/21.3 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-hackers@freebsd.org Subject: Re: numbers don't lie ... X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Sep 2006 21:22:21 -0000 Gary Corcoran writes: > The confusing thing is that I thought 'real' time should be >=3D 'user' += 'sys'. > But here 'user' is much greater than 'real' for both machines! The sense= I > got from the other messages in this thread is that 'user' time is somewhat > meaningless (i.e. unreliable as a measure) in a multi-CPU and/or hyperthr= eading > environment. Can you clarify? real >=3D (user + sys) * ncpu DES --=20 Dag-Erling Sm=F8rgrav - des@des.no