From owner-freebsd-hackers@FreeBSD.ORG Fri Oct 24 04:27:49 2003 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 1EA4816A4B3 for ; Fri, 24 Oct 2003 04:27:49 -0700 (PDT) Received: from shiva.jussieu.fr (shiva.jussieu.fr [134.157.0.129]) by mx1.FreeBSD.org (Postfix) with ESMTP id B6B1643F85 for ; Fri, 24 Oct 2003 04:27:47 -0700 (PDT) (envelope-from talon@lpthe.jussieu.fr) Received: from parthe.lpthe.jussieu.fr (parthe.lpthe.jussieu.fr [134.157.10.1])h9OBRk4B051133 for ; Fri, 24 Oct 2003 13:27:46 +0200 (CEST) Received: from niobe (postfix@niobe.lpthe.jussieu.fr [134.157.10.41]) h9OBRfn32550 for ; Fri, 24 Oct 2003 13:27:41 +0200 Received: by niobe (Postfix, from userid 2005) id 54C91A91; Fri, 24 Oct 2003 13:27:40 +0200 (CEST) Date: Fri, 24 Oct 2003 13:27:40 +0200 From: Michel TALON To: freebsd-hackers@freebsd.org Message-ID: <20031024112740.GA20599@lpthe.jussieu.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.28i X-Antivirus: scanned by sophie at shiva.jussieu.fr Subject: Re: Some mmap observations compared to Linux 2.6/OpenBSD 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: Fri, 24 Oct 2003 11:27:49 -0000 > Yes, it would appear this is a legacy thing that existed in the original > 1994 import of the BSD 4.4 Lite source. Both FreeBSD and NetBSD still > use this technique, but OpenBSD changed to using Red-Black trees back in > Feb 2002. What is more interesting is to look at the actual benchmark results in http://bulk.fefe.de/scalability/ in particular the section about mmap benchmarks, the only one where OpenBSD shines. However as soon as touching pages is benchmarked OpenBSD fails very much. -- Michel TALON