From owner-freebsd-stable@FreeBSD.ORG Tue Nov 20 21:22:44 2007 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1581C16A419 for ; Tue, 20 Nov 2007 21:22:44 +0000 (UTC) (envelope-from kometen@gmail.com) Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.189]) by mx1.freebsd.org (Postfix) with ESMTP id A7CE713C459 for ; Tue, 20 Nov 2007 21:22:43 +0000 (UTC) (envelope-from kometen@gmail.com) Received: by nf-out-0910.google.com with SMTP id b2so1919981nfb for ; Tue, 20 Nov 2007 13:22:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=4atVC6C60BmzTQ0twrLwVKTw+DRFg/+HiF7wFu+peGI=; b=KS1j/+FHXjjilwGYbN2UNTXwvZv8CwgZOow7xXbhTskwRRo0acNpOxZPZ+dVk5wNd/rW/yehFLzsNmskrHyn8BFW6DA3fx/TI6b7UTfHT7WPGCEq13c5ue5lS6q0M7WjT8gB/AANwWGMxUC7pYN14/OMkgsZM3RuaYS6MLbum9k= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=n+HYFHcxaSj1YXlf6C6rw9wzWv8/Td0MlGHl4+rMnF7PDJ904jZCs1Ge8RE6rI6uWrCL0OgSepWwYjWkhKlDT+lYrBdCyybEzs6P4siZry2aDKFKJr/wIIsl0syPyRlgLFwGlM8bChS8U+EubRjEyalw+H4Qt5GoyH0KRsCP3oY= Received: by 10.78.118.5 with SMTP id q5mr7391205huc.1195593762070; Tue, 20 Nov 2007 13:22:42 -0800 (PST) Received: by 10.78.161.3 with HTTP; Tue, 20 Nov 2007 13:22:41 -0800 (PST) Message-ID: Date: Tue, 20 Nov 2007 22:22:41 +0100 From: "Claus Guttesen" To: "Kris Kennaway" In-Reply-To: <47434E01.8020004@FreeBSD.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4741905E.8050300@chistydom.ru> <4741A7DA.2050706@chistydom.ru> <4741DA15.9000308@FreeBSD.org> <47429DB8.7040504@chistydom.ru> <4742ADFE.40902@FreeBSD.org> <4742C46A.1060701@chistydom.ru> <47432F77.3030606@FreeBSD.org> <97FEA818-B54F-4981-A0A4-440D1DF5AB7A@gid.co.uk> <47434E01.8020004@FreeBSD.org> Cc: Attilio Rao , freebsd-stable@freebsd.org, Alexey Popov Subject: Re: 2 x quad-core system is slower that 2 x dual core on FreeBSD X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Nov 2007 21:22:44 -0000 > > FWIW, we are seeing 2 x quad-core 2.66GHz outperform (per core) 2 x > > dual-core 3GHz on the same type of m/b, apparently because of better > > bandwidth to memory. However, this is on a compute-intensive workload > > running 1 job per core so would be pretty insensitive to > > scheduler/locking issues. > > Alexey's problem is pretty specific to filesystem performance. Good to > hear though :) If that is the conclusion, wouldn't it make sense trying a different disk-controller then? -- regards Claus When lenity and cruelty play for a kingdom, the gentlest gamester is the soonest winner. Shakespeare