From owner-freebsd-hackers@FreeBSD.ORG Thu Apr 1 04:22:08 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 51EB616A4CF for ; Thu, 1 Apr 2004 04:22:08 -0800 (PST) Received: from mta1.xnet.ro (mta1.xnet.ro [217.10.192.225]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9585143D31 for ; Thu, 1 Apr 2004 04:22:05 -0800 (PST) (envelope-from clau@reversedhell.net) Received: from reversedhell.net ([82.77.37.175]) (authenticated bits=0)i31CM3A6027998 for ; Thu, 1 Apr 2004 15:22:03 +0300 Message-ID: <406C093C.5050204@reversedhell.net> Date: Thu, 01 Apr 2004 15:21:16 +0300 From: Claudiu Dragalina-Paraipan User-Agent: Mozilla Thunderbird 0.5 (Windows/20040207) X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-hackers@freebsd.org References: <6.0.1.1.1.20040401115446.0378a8f8@imap.sfu.ca> In-Reply-To: <6.0.1.1.1.20040401115446.0378a8f8@imap.sfu.ca> X-Enigmail-Version: 0.83.3.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig9AEE5FB1F4F062CE714444CD" X-RAVMilter-Version: 8.4.3(snapshot 20030212) (mta1.xnet.ro) X-Content-Filtered-By: Mailman/MimeDel 2.1.1 Subject: Re: implications of SMP kernel on UP X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Apr 2004 12:22:08 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig9AEE5FB1F4F062CE714444CD Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit hello, what about SMP enabled kernel on Intel P4 with HT technology ? I have one but I didn't had the chance to test it yet. Colin Percival wrote: > At 08:10 01/04/2004, Bjoern A. Zeeb wrote: > >>what are the implications on running an SMP enabled kernel on a UP >>machine ? >> >>I first thought of things like: >>- performence (most likely not worth the discussion ?) > > > At least in 5.2-RELEASE, there is a significant performance > delta; buildworld takes about 5% longer on an SMP kernel (and > the time spent in the kernel is 20% longer). > I know some optimizations were done shortly after 5.2, so I > wouldn't be surprised if this situation has improved. > > Colin Percival > With respect, -- Claudiu Dragalina-Paraipan Reversed Hell Networks / reversedhell.net e-mail: clau@reversedhell.net --------------enig9AEE5FB1F4F062CE714444CD Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFAbAlCm0FWxb+swkQRAgw6AJ4xJP6mujVTgBMpqNrv7e0Qj7V6cACgqlgb eN6Y9HhYDC4lydReH6wqhf4= =dozW -----END PGP SIGNATURE----- --------------enig9AEE5FB1F4F062CE714444CD--