From owner-freebsd-net@FreeBSD.ORG Wed Mar 17 14:56:16 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1791416A4CE for ; Wed, 17 Mar 2004 14:56:16 -0800 (PST) Received: from blake.polstra.com (blake.polstra.com [64.81.189.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id A05E843D3F for ; Wed, 17 Mar 2004 14:56:15 -0800 (PST) (envelope-from jdp@polstra.com) Received: from strings.polstra.com (dsl081-189-067.sea1.dsl.speakeasy.net [64.81.189.67]) by blake.polstra.com (8.12.11/8.12.11) with ESMTP id i2HMuEfD040747 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 17 Mar 2004 14:56:15 -0800 (PST) (envelope-from jdp@strings.polstra.com) Received: (from jdp@localhost) by strings.polstra.com (8.12.11/8.12.11/Submit) id i2HMuEdC028110; Wed, 17 Mar 2004 14:56:14 -0800 (PST) (envelope-from jdp) Message-ID: X-Mailer: XFMail 1.5.5 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <2697.192.168.0.200.1079398101.squirrel@192.168.0.1> Date: Wed, 17 Mar 2004 14:56:14 -0800 (PST) From: John Polstra To: Mike Jakubik X-Bogosity: No, tests=bogofilter, spamicity=0.512747, version=0.14.5 cc: net@freebsd.org Subject: Re: Byte counters reset at ~4GB X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Mar 2004 22:56:16 -0000 On 16-Mar-2004 Mike Jakubik wrote: > > Got it. In just curious though... realistically, how big of an impact on > performance is this on a modern CPU? Is it not simply the original 32bit > calculation x 2? Please, just search the mailing list archives. We've already had this discussion in depth. It is not the original 32-bit calculation times two, because in order to keep it atomic on a 32-bit machine you have to use locking or a LOCK prefix or something expensive like that. Now, you tenors and altos over there: this is not your cue to repeat verse 3 where you sing all about how maybe atomicity might not be needed in this case. You already sang that one, and it's in the archives, remember? In fact, we've already sung the whole song, and the audience doesn't want to hear it again. They've got the CD, and it's called The Mailing List Archives. OK? OK! John (still working on that Bill Paul imitation)