From owner-freebsd-current@FreeBSD.ORG Thu Dec 2 00:25:59 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1AEF516A4CE for ; Thu, 2 Dec 2004 00:25:59 +0000 (GMT) Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 09EBA43D49 for ; Thu, 2 Dec 2004 00:25:59 +0000 (GMT) (envelope-from dwhite@gumbysoft.com) Received: by carver.gumbysoft.com (Postfix, from userid 1000) id F2B9672DF8; Wed, 1 Dec 2004 16:25:58 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by carver.gumbysoft.com (Postfix) with ESMTP id EDC7F72DD4; Wed, 1 Dec 2004 16:25:58 -0800 (PST) Date: Wed, 1 Dec 2004 16:25:58 -0800 (PST) From: Doug White To: Joseph Koshy In-Reply-To: <84dead720411300329249d4bf3@mail.gmail.com> Message-ID: <20041201162501.H71481@carver.gumbysoft.com> References: <84dead720411300329249d4bf3@mail.gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-current Subject: Re: Dual CPU detection problem X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Dec 2004 00:25:59 -0000 On Tue, 30 Nov 2004, Joseph Koshy wrote: > Strange problem. > > On an IBM xSeries 335 machine with TWO P4 HTT cpus (mptable, dmesg output > enclosed) FreeBSD -CURRENT will sometimes detect both the physical CPUs > and will sometimes detect only one. > > FreeBSD 5.3 reliably detects the 2 physical / 4 logical CPUs that are present. > > Any suggestions on how to debug this? dmesg + mptable + acpidump output in both situations would be a good start. Sounds like one of the physical CPUs might be flakey; you see 2 CPUs since you see the solitary core's hyperthreaded pair. -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org