From owner-freebsd-chat@FreeBSD.ORG Thu Oct 30 06:14:54 2003 Return-Path: Delivered-To: freebsd-chat@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 646E016A4CE for ; Thu, 30 Oct 2003 06:14:54 -0800 (PST) Received: from moo.sysabend.org (moo.sysabend.org [66.111.41.70]) by mx1.FreeBSD.org (Postfix) with ESMTP id 708A243F75 for ; Thu, 30 Oct 2003 06:14:51 -0800 (PST) (envelope-from ragnar@sysabend.org) Received: by moo.sysabend.org (Postfix, from userid 1004) id A25EEACD; Thu, 30 Oct 2003 06:14:50 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by moo.sysabend.org (Postfix) with ESMTP id A13AFAC6; Thu, 30 Oct 2003 06:14:50 -0800 (PST) Date: Thu, 30 Oct 2003 06:14:50 -0800 (PST) From: Jamie Bowden To: Bill Moran In-Reply-To: <3FA00634.6000002@potentialtech.com> Message-ID: <20031030055630.U20891-100000@moo.sysabend.org> X-representing: Only myself. X-badge: We don't need no stinking badges. X-obligatory-profanity: Fuck X-moo: Moo. MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: chat@freebsd.org Subject: Re: How much better are 64 but platforms X-BeenThere: freebsd-chat@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Non technical items related to the community List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Oct 2003 14:14:54 -0000 On Wed, 29 Oct 2003, Bill Moran wrote: > I understand that nobody can answer this question exactly, but I'm > curious to hear people's experiences. I mean, if you just took FreeBSD > (for example) by itself and moved it from 32 - 64 bit, how much faster > is it (assuming the same mhz processor, if possible). How about > PostgreSQL (which is the database server we're using). I spend my days running SGIs, and I've got old Indys and Indigo2s on up to current Origin systems here. For code that REALLY needs 64bit, everything obviously runs better on the 64bit clean platforms...but something we've found is that for things that don't need 64bit, compiling it on 64bit clean hardware runs it slower than the same code compiled on 32bit, and then run on 64bit clean systems (I use an Origin300 2xR14000/600mHz for tests). This is code compiled using the same compilers, on the same system, doing nothing more than changing Irix cc's options from: -DEFAULT:abi=n32:isa=mips4:proc=r10k to: -DEFAULT:abi=n32:isa=mips3:proc=r4k I have no idea if AMD/Intel systems will show this same sort of behaviour or not. Jamie Bowden -- "It was half way to Rivendell when the drugs began to take hold" Hunter S Tolkien "Fear and Loathing in Barad Dur" Iain Bowen