From owner-freebsd-questions@FreeBSD.ORG Tue Sep 23 01:14:35 2003 Return-Path: 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 2027C16A4B3 for ; Tue, 23 Sep 2003 01:14:35 -0700 (PDT) Received: from sferics.mongueurs.net (sferics.mongueurs.net [81.80.147.197]) by mx1.FreeBSD.org (Postfix) with ESMTP id A1E2C43FB1 for ; Tue, 23 Sep 2003 01:14:33 -0700 (PDT) (envelope-from david@landgren.net) Received: from landgren.net (81-80-147-206.bpinet.com [81.80.147.206]) by sferics.mongueurs.net (Postfix) with ESMTP id 032C021B0 for ; Tue, 23 Sep 2003 09:49:56 +0200 (CEST) Message-ID: <3F6FFB34.4070208@landgren.net> Date: Tue, 23 Sep 2003 09:50:12 +0200 From: David Landgren Organization: A thousand golden eyes are watching User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5a) Gecko/20030718 X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-questions@FreeBSD.ORG References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Can I disable HTT in 4.8-STABLE? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Sep 2003 08:14:35 -0000 Kent Ketell wrote: > Is there a way to disable the hyperthreading in 4.8-STABLE or > 4.9-PRERELEASE? I'd like to be able to test with and without HTT > enabled to see whether it's actually helping or not. You have to compile a kernel with and without the options SMP, APIC_IO and HTT. You can test if you're running with HTT by examining the output of 'sysctl hw.ncpu'. David