From owner-freebsd-current@FreeBSD.ORG  Thu Jul 10 03:12:10 2003
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 52DA837B401
	for <freebsd-current@freebsd.org>;
	Thu, 10 Jul 2003 03:12:10 -0700 (PDT)
Received: from bluejay.mail.pas.earthlink.net (bluejay.mail.pas.earthlink.net
	[207.217.120.218])
	by mx1.FreeBSD.org (Postfix) with ESMTP id B280F43F75
	for <freebsd-current@freebsd.org>;
	Thu, 10 Jul 2003 03:12:09 -0700 (PDT)
	(envelope-from tlambert2@mindspring.com)
Received: from user-2ivfjrs.dialup.mindspring.com ([165.247.207.124]
	helo=mindspring.com)
	by bluejay.mail.pas.earthlink.net with asmtp (SSLv3:RC4-MD5:128)
	(Exim 3.33 #1)	id 19aYP7-0007YR-00; Thu, 10 Jul 2003 03:11:57 -0700
Message-ID: <3F0D3BAF.3A40E28D@mindspring.com>
Date: Thu, 10 Jul 2003 03:10:55 -0700
From: Terry Lambert <tlambert2@mindspring.com>
X-Mailer: Mozilla 4.79 [en] (Win98; U)
X-Accept-Language: en
MIME-Version: 1.0
To: Jens Rehsack <rehsack@liwing.de>
References: <20030709123734.GA50458@nagual.pp.ru>	<3F0C0ED6.4030202@liwing.de>
	<20030709150718.GC28375@Odin.AC.HMC.Edu><3F0C8F20.6040102@liwing.de>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-ELNK-Trace: b1a02af9316fbb217a47c185c03b154d40683398e744b8a4bcb5a3dcd796c1e42fd80f93b9eb939193caf27dac41a8fd350badd9bab72f9c350badd9bab72f9c
cc: ache@nagual.pp.ru
cc: freebsd-current@freebsd.org
cc: "M. Warner Losh" <imp@bsdimp.com>
cc: l.ertl@univie.ac.at
Subject: Re: HTT on single CPU?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 10 Jul 2003 10:12:10 -0000

Jens Rehsack wrote:
> How can I found out whether a board supports HTT or not?
> I haven't seen it in none description I checked. Are some
> chipsets (865, 875) always ready or is the bios programmer
> the guy who must activate this feature?

One non-obvious-at-first-glance thing that springs to mind is
that for a single CPU board, you have to pick one with a support
chipset that includes an IO APIC (minimally), since the SMP code
require that you use APIC I/O.

-- Terry