From owner-freebsd-amd64@FreeBSD.ORG Sat Jan 22 00:16:38 2005 Return-Path: Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7FE5F16A4CE for ; Sat, 22 Jan 2005 00:16:38 +0000 (GMT) Received: from sb.santaba.com (sb.santaba.com [207.154.84.26]) by mx1.FreeBSD.org (Postfix) with ESMTP id 57A6043D31 for ; Sat, 22 Jan 2005 00:16:38 +0000 (GMT) (envelope-from jbehl@fastclick.com) Received: from [192.168.3.100] (unknown [205.180.85.193]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by sb.santaba.com (Postfix) with ESMTP id F31C428485 for ; Fri, 21 Jan 2005 16:16:37 -0800 (PST) Message-ID: <41F19B8D.4010005@fastclick.com> Date: Fri, 21 Jan 2005 16:17:17 -0800 From: Jeff Behl User-Agent: Mozilla Thunderbird 0.8 (Windows/20040913) X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-amd64@FreeBSD.org References: <41F198F8.9020608@fastclick.com> <20050122001320.GA39743@dragon.nuxi.com> In-Reply-To: <20050122001320.GA39743@dragon.nuxi.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: bsd i386 on amd64 X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Jan 2005 00:16:38 -0000 David O'Brien wrote: >On Fri, Jan 21, 2005 at 04:06:16PM -0800, Jeff Behl wrote: > > >>i have a dual proc 3gHz AMD Opteron box >> >> > >Impossible. :-) The fastest Opteron right now is 2.5 GHz. > > > yep, you got got me. they're 2gHz. >>that i want to run java on, so >>it looks like i have to use the i386 build (any news on the jdk coming >>to AMD?). >> >> > >You probably want to use the Linux 'i386' JDK. > > > so Linux JDK is stable and has decent performance, and won't cause me any headache in terms of compatibility with things like Tomcat? i guess byte code is byte, or so they say... >>from what i've gathered, this should not be a problem and >>performance should be at least par compared to to running on a Xeon. is >>this true? i even seem to remember hearing rumor that the Opteron could >>even run i386 code faster, mHz to mHz, than a Xeon? >> >> > >An Opteron runs all code faster MHz to MHz compared to Xeon. Opteron >has a shorter pipeline and thus can do more work per cycle. Xeon has a >very deep pipeline and thus can be clocked higher and must be clocked >higher to get the same performance. > > > great news, thanks much! jeff