From owner-freebsd-hackers@FreeBSD.ORG Wed Feb 25 13:46:16 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 8083616A4CE for ; Wed, 25 Feb 2004 13:46:16 -0800 (PST) Received: from sccrmhc11.comcast.net (sccrmhc11.comcast.net [204.127.202.55]) by mx1.FreeBSD.org (Postfix) with ESMTP id E1EC343D1F for ; Wed, 25 Feb 2004 13:46:15 -0800 (PST) (envelope-from rodrigc@h00609772adf0.ne.client2.attbi.com) Received: from dibbler.crodrigues.org (h00609772adf0.ne.client2.attbi.com[66.31.45.197]) by comcast.net (sccrmhc11) with ESMTP id <2004022521461401100pj3ute>; Wed, 25 Feb 2004 21:46:14 +0000 Received: from dibbler.crodrigues.org (localhost.crodrigues.org [127.0.0.1]) i1PLkJOI060164 for ; Wed, 25 Feb 2004 16:46:19 -0500 (EST) (envelope-from rodrigc@h00609772adf0.ne.client2.attbi.com) Received: (from rodrigc@localhost) by dibbler.crodrigues.org (8.12.10/8.12.10/Submit) id i1PLkJEe060163 for freebsd-hackers@freebsd.org; Wed, 25 Feb 2004 16:46:19 -0500 (EST) (envelope-from rodrigc) Date: Wed, 25 Feb 2004 16:46:18 -0500 From: Craig Rodrigues To: freebsd-hackers@freebsd.org Message-ID: <20040225214618.GA60156@crodrigues.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Subject: Questions about CPU related sysctls 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: Wed, 25 Feb 2004 21:46:16 -0000 Hi, I want to write some C code to get a count of the number of CPU's on a running system. What is the difference between these two sysctls? kern.smp.cpus: Number of CPUs online hw.ncpu: Number of active CPUs Also, can someone give a brief description of these sysctls (sysctl -d doesn't show anything for them). Would it be a good idea to add some text to these syctls? kern.ccpu: hw.acpi.cpu.cx_history: machdep.hlt_cpus: -- Craig Rodrigues http://crodrigues.org rodrigc@crodrigues.org