From owner-freebsd-questions@FreeBSD.ORG Wed Aug 30 21:44:33 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 8EE9D16A4DF for ; Wed, 30 Aug 2006 21:44:33 +0000 (UTC) (envelope-from skylar@cs.earlham.edu) Received: from quark.cs.earlham.edu (cs.earlham.edu [159.28.230.3]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6C9C843D49 for ; Wed, 30 Aug 2006 21:44:29 +0000 (GMT) (envelope-from skylar@cs.earlham.edu) Received: from [128.95.231.218] (angband.gs.washington.edu [128.95.231.218]) (authenticated bits=0) by quark.cs.earlham.edu (8.13.6/8.13.3) with ESMTP id k7ULiI6P064403 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 30 Aug 2006 17:44:19 -0400 (EDT) (envelope-from skylar@cs.earlham.edu) X-Authentication-Warning: quark.cs.earlham.edu: Host angband.gs.washington.edu [128.95.231.218] claimed to be [128.95.231.218] Message-ID: <44F60697.5060407@cs.earlham.edu> Date: Wed, 30 Aug 2006 14:43:51 -0700 From: Skylar Thompson Organization: Earlham College Computer Science Department User-Agent: Mail/News 1.5.0.5 (X11/20060728) MIME-Version: 1.0 To: Jordi Carrillo References: <94ff3700608301020l34251166nbdb4d72842e1bb86@mail.gmail.com> <20060830181240.65785.qmail@web83106.mail.mud.yahoo.com> <94ff3700608301302n13f9aabcs935fbe6403601d30@mail.gmail.com> <44F6036E.7050203@cs.earlham.edu> <94ff3700608301437u4ea3280ama8a9cfda3edfda08@mail.gmail.com> In-Reply-To: <94ff3700608301437u4ea3280ama8a9cfda3edfda08@mail.gmail.com> X-Enigmail-Version: 0.94.0.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig79325C935141CC1113A573C5" X-Greylist: Sender succeded SMTP AUTH authentication, not delayed by milter-greylist-1.6 (quark.cs.earlham.edu [159.28.230.3]); Wed, 30 Aug 2006 17:44:23 -0400 (EDT) X-Virus-Scanned: ClamAV 0.88.2/1623/Wed Jul 26 18:35:11 2006 on quark.cs.earlham.edu X-Virus-Status: Clean X-Scanned-By: MIMEDefang 2.56 on 159.28.230.3 X-Spam-Status: No, score=-2.5 required=8.0 tests=AWL,BAYES_00 autolearn=ham version=3.1.3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on quark.cs.earlham.edu Cc: backyard1454-bsd@yahoo.com, freebsd-questions@freebsd.org Subject: Re: SMP detection X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: skylar@cs.earlham.edu List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Aug 2006 21:44:33 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig79325C935141CC1113A573C5 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Jordi Carrillo wrote: > Skylar, > So, 50% is used for processes and the other 50% to handle hardware > interrupts. Is that right? > I believe so, but the blurb that I read that in is from 2003. There's a good chance someone will jump in to correct me. :) It was in /usr/src/UPDATING: 20031022: Support for HyperThread logical CPUs has now been enabled by default. As a result, the HTT kernel option no longer exists. Instead, the logical CPUs are always started so that they can handle interrupts. However, the extra logical CPUs are prevented from executing user processes by default. To enable the logical CPUs, change the value of the machdep.hlt_logical_cpus from 1 to 0. This value can also be set from the loader as a tunable of the same name. --=20 -- Skylar Thompson (skylar@cs.earlham.edu) -- http://www.cs.earlham.edu/~skylar/ --------------enig79325C935141CC1113A573C5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (SunOS) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFE9gaasc4yyULgN4YRAkITAJ4jrj89ed2JZyW1c97AFk2Po5a57QCdHSyH 1KSa3VR/TZM0QoobbxGvO0I= =GQz2 -----END PGP SIGNATURE----- --------------enig79325C935141CC1113A573C5--