From owner-freebsd-smp@FreeBSD.ORG Mon Oct 16 21:25:30 2006 Return-Path: X-Original-To: freebsd-smp@freebsd.org Delivered-To: freebsd-smp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5112C16A407 for ; Mon, 16 Oct 2006 21:25:30 +0000 (UTC) (envelope-from ivoras@fer.hr) Received: from ls405.htnet.hr (ls405.t-com.hr [195.29.150.135]) by mx1.FreeBSD.org (Postfix) with ESMTP id 03E4443DA4 for ; Mon, 16 Oct 2006 21:25:18 +0000 (GMT) (envelope-from ivoras@fer.hr) Received: from ls242.t-com.hr (ls242.t-com.hr [195.29.150.134]) by ls405.htnet.hr (Postfix) with ESMTP id CA9A7144EC8; Mon, 16 Oct 2006 23:25:17 +0200 (CEST) Received: from ls242.t-com.hr (localhost.localdomain [127.0.0.1]) by ls242.t-com.hr (Qmlai) with ESMTP id B415C10F8049; Mon, 16 Oct 2006 23:25:17 +0200 (CEST) Received: from ls242.t-com.hr (localhost.localdomain [127.0.0.1]) by ls242.t-com.hr (Qmlai) with ESMTP id 9AFB010F803E; Mon, 16 Oct 2006 23:25:17 +0200 (CEST) X-Envelope-Sender-Info: qNMqIwJL6pMxrLsv6Bv6Q6XF7/mJNU6YsAmYV7Axjeimp4s0h0LR930RvhHN8nte X-Envelope-Sender: ivoras@fer.hr Received: from [10.0.0.100] (83-131-98-225.adsl.net.t-com.hr [83.131.98.225])by ls242.t-com.hr (Qmali) with ESMTP id 64A2E6C003B; Mon, 16 Oct 2006 23:25:17 +0200 (CEST) Message-ID: <4533F8C3.90301@fer.hr> Date: Mon, 16 Oct 2006 23:25:23 +0200 From: Ivan Voras User-Agent: Thunderbird 1.5.0.7 (Windows/20060909) MIME-Version: 1.0 To: Kian Mohageri References: <4533EE53.90106 03@fer.hr> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-imss-version: 2.043 X-imss-result: Passed X-imss-scanInfo: M:P L:N SM:0 X-imss-tmaseResult: TT:0 TS:0.0000 TC:00 TRN:0 TV:3.6.1039(14756.003) X-imss-scores: Clean:99.90000 C:2 M:3 S:5 R:5 X-imss-settings: Baseline:1 C:1 M:1 S:1 R:1 (0.0000 0.0000) Cc: freebsd-smp@freebsd.org Subject: Re: xeon 2.8GHz SMP/NOT test results X-BeenThere: freebsd-smp@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: FreeBSD SMP implementation group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Oct 2006 21:25:30 -0000 Kian Mohageri wrote: > I noticed somebody suggested trying SMP with hyperthreading disabled > in the BIOS, and I'm a little bit confused as to what sort of results > should I expect from that. To see how much overhead does the SMP support in kernel bring, as compared to the UP kernel. There's a relatively big difference in how internal scheduling and synchronization works in these two cases. The purpose of the benchmark is to show if, in the long term, the SMP kernel could be made the default one.