From owner-freebsd-questions Tue Jan 21 7:16: 8 2003 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6C47637B401 for ; Tue, 21 Jan 2003 07:16:07 -0800 (PST) Received: from sccrmhc01.attbi.com (sccrmhc01.attbi.com [204.127.202.61]) by mx1.FreeBSD.org (Postfix) with ESMTP id 67B6D43F1E for ; Tue, 21 Jan 2003 07:16:05 -0800 (PST) (envelope-from freebsd-questions-local@be-well.no-ip.com) Received: from be-well.ilk.org (lowellg.ne.client2.attbi.com[24.147.188.198]) by sccrmhc01.attbi.com (sccrmhc01) with ESMTP id <2003012115160400100hpohle>; Tue, 21 Jan 2003 15:16:04 +0000 Received: from be-well.ilk.org (lowellg.ne.client2.attbi.com [24.147.188.198] (may be forged)) by be-well.ilk.org (8.12.6/8.12.6) with ESMTP id h0LFG4DD004711 for ; Tue, 21 Jan 2003 10:16:04 -0500 (EST) (envelope-from freebsd-questions-local@be-well.no-ip.com) Received: (from lowell@localhost) by be-well.ilk.org (8.12.6/8.12.6/Submit) id h0LFG3PV004708; Tue, 21 Jan 2003 10:16:03 -0500 (EST) X-Authentication-Warning: be-well.ilk.org: lowell set sender to freebsd-questions-local@be-well.ilk.org using -f To: freebsd-questions@freebsd.org Subject: Re: memory limit problem again. References: <001a01c2c03b$b24efe40$1500a8c0@ilovefd533> From: Lowell Gilbert Date: 21 Jan 2003 10:16:03 -0500 In-Reply-To: <001a01c2c03b$b24efe40$1500a8c0@ilovefd533> Message-ID: <448yxejzyk.fsf@be-well.ilk.org> Lines: 35 User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG "ilovefd" writes: > I am a user of FreeBSD-4.7. > I baught a Mother board(P4QH6) with Xeon MP from Supermicro. > > Supermicro says about P4QH6 > > Yes the MP Xeons and this motherboard can fully access 32GB of main > memory. The processor is a 32 bit instruction code processor, but is a > 64 bit device which easily accesses 32GB of main memory. This doesn't parse quite right, but it definitely seems incorrect in any case. The Xeon is a 32-bit device, period. It has 4GB of address space, period. What this system can do is window into the memory in some fairly sophisticated ways, but it's still only a 4GB address space. > How should I do to let FreeBSD-4.7/5.0 access to 32GB mem? So far as I know, nobody is working on supporting this functionality, because it's a fairly slow way of getting access to extra memory. > IA64 is available for it? No. IA64 is strictly for Itanium, at least for the moment. Xeons are *not* IA64. > Or Shoul I chose any other operationg system? Windows is the only system that will use it at all well, but I seem to recall that Linux had some work on support for it. For nearly any general-computing application, though, you'll get better performance at a given price by using systems that can address all of their own memory directly. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message