From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1Gh3wa-0004e1-Om for garchives@archives.gentoo.org; Mon, 06 Nov 2006 12:51:17 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.8/8.13.8) with SMTP id kA6CnDU0017591; Mon, 6 Nov 2006 12:49:13 GMT Received: from mail.randombit.net (lain.randombit.net [66.179.181.40]) by robin.gentoo.org (8.13.8/8.13.8) with ESMTP id kA6CnBat008581 for ; Mon, 6 Nov 2006 12:49:12 GMT Received: by mail.randombit.net (Postfix, from userid 501) id 17E9E3B60F4; Mon, 6 Nov 2006 07:49:13 -0500 (EST) Date: Mon, 6 Nov 2006 07:49:12 -0500 From: Jack Lloyd To: gentoo-amd64@lists.gentoo.org Subject: Re: [gentoo-amd64] Re: Unexpected side effect of GCC 4 Message-ID: <20061106124912.GI5921@randombit.net> Mail-Followup-To: gentoo-amd64@lists.gentoo.org References: <200611050845.42865.prh@gotadsl.co.uk> <200611061147.37428.volker.armin.hemmann@tu-clausthal.de> <200611061148.52817.prh@gotadsl.co.uk> <200611061305.31763.volker.armin.hemmann@tu-clausthal.de> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-amd64@gentoo.org Reply-to: gentoo-amd64@lists.gentoo.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200611061305.31763.volker.armin.hemmann@tu-clausthal.de> X-PGP-Fingerprint: 3F69 2E64 6D92 3BBE E7AE 9258 5C0F 96E8 4EC1 6D6B X-PGP-Key: http://www.randombit.net/pgpkey.html User-Agent: Mutt/1.5.11 X-Archives-Salt: 157b9967-b4c3-4e8b-bb2e-e80d15789c30 X-Archives-Hash: 0cab51e157d4831ae358cab86fb9bbbc On Mon, Nov 06, 2006 at 01:05:31PM +0100, Hemmann, Volker Armin wrote: > lets ask the other way round. Why should it speed up anything to have X>number > of cores? Instead of a single thread per core, compiling happily, you have > two or more competing for one core and regularly kick out each others data > from the cache. To account for I/O wait states -- gentoo-amd64@gentoo.org mailing list