From owner-freebsd-questions@FreeBSD.ORG Thu Aug 31 00:28:06 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 6DA9416A4DA for ; Thu, 31 Aug 2006 00:28:06 +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 BB3CB43D5A for ; Thu, 31 Aug 2006 00:28:05 +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 k7V0RqMv071307 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 30 Aug 2006 20:27:54 -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: <44F62CEE.9040202@cs.earlham.edu> Date: Wed, 30 Aug 2006 17:27:26 -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: Michal Mertl References: <94ff3700608301020l34251166nbdb4d72842e1bb86@mail.gmail.com> <20060830181240.65785.qmail@web83106.mail.mud.yahoo.com> <94ff3700608301302n13f9aabcs935fbe6403601d30@mail.gmail.com> <44F6036E.7050203@cs.earlham.edu> <1156982800.1017.37.camel@genius.i.cz> In-Reply-To: <1156982800.1017.37.camel@genius.i.cz> X-Enigmail-Version: 0.94.0.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig2ECE36925D056B72C1EA1CA0" 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 20:27:55 -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, Jordi Carrillo , 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: Thu, 31 Aug 2006 00:28:06 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig2ECE36925D056B72C1EA1CA0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Michal Mertl wrote: > No! Kernel threads (e.g. handling interrupts) aren't that much differen= t > to normal processes. > > Logical CPUs on a single HTT capable CPU share most of the CPU logic, > especially all the external stuff (handling interrupts). Scheduling > handling of interrupts on the "secondary/logical" core wouldn't > probably help performance at all (if that is at all possible). > =20 Could you clarify note 20031022 in /usr/src/UPDATING? It states that HTT CPUs are used for interrupts if they are detected, even if they aren't used by regular processes. Was this something that just showed up in pre-6.x releases? --=20 -- Skylar Thompson (skylar@cs.earlham.edu) -- http://www.cs.earlham.edu/~skylar/ --------------enig2ECE36925D056B72C1EA1CA0 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 iD8DBQFE9izwsc4yyULgN4YRAhQcAJ9VJyNxsenAS5coRBEzG/q3eBTNWACcD4F3 1JASoj4DRP8F1rsJoudB/Y0= =GQK8 -----END PGP SIGNATURE----- --------------enig2ECE36925D056B72C1EA1CA0--