From owner-freebsd-stable@FreeBSD.ORG Wed Jul 14 14:14:49 2010 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 E5C351065672 for ; Wed, 14 Jul 2010 14:14:49 +0000 (UTC) (envelope-from olli@lurza.secnetix.de) Received: from lurza.secnetix.de (lurza.secnetix.de [IPv6:2a01:170:102f::2]) by mx1.freebsd.org (Postfix) with ESMTP id 6735A8FC15 for ; Wed, 14 Jul 2010 14:14:49 +0000 (UTC) Received: from lurza.secnetix.de (localhost [127.0.0.1]) by lurza.secnetix.de (8.14.3/8.14.3) with ESMTP id o6EEEUe8014691; Wed, 14 Jul 2010 16:14:47 +0200 (CEST) (envelope-from oliver.fromme@secnetix.de) Received: (from olli@localhost) by lurza.secnetix.de (8.14.3/8.14.3/Submit) id o6EEEUx9014690; Wed, 14 Jul 2010 16:14:30 +0200 (CEST) (envelope-from olli) Date: Wed, 14 Jul 2010 16:14:30 +0200 (CEST) Message-Id: <201007141414.o6EEEUx9014690@lurza.secnetix.de> From: Oliver Fromme To: freebsd-stable@FreeBSD.ORG X-Newsgroups: list.freebsd-stable User-Agent: tin/1.8.3-20070201 ("Scotasay") (UNIX) (FreeBSD/6.4-PRERELEASE-20080904 (i386)) MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.3.4 (lurza.secnetix.de [127.0.0.1]); Wed, 14 Jul 2010 16:14:47 +0200 (CEST) Cc: Subject: 8.1-PRERELEASE: CPU packages not detected correctly 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: Wed, 14 Jul 2010 14:14:50 -0000 In a machine installed yesterday, 8.1-PRERELEASE doesn't seem to detect the number of CPU packages vs. cores per package correctly: | FreeBSD 8.1-PRERELEASE-20100713 #0: Tue Jul 13 19:51:18 UTC 2010 | [...] | CPU: Intel(R) Xeon(R) CPU L5408 @ 2.13GHz (2133.42-MHz K8-class CPU) | Origin = "GenuineIntel" Id = 0x1067a Family = 6 Model = 17 Stepping = 10 | Features=0xbfebfbff | Features2=0x40ce3bd | AMD Features=0x20000800 | AMD Features2=0x1 | TSC: P-state invariant | real memory = 34359738368 (32768 MB) | avail memory = 33151377408 (31615 MB) | ACPI APIC Table: | FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs | FreeBSD/SMP: 1 package(s) x 8 core(s) | cpu0 (BSP): APIC ID: 0 | cpu1 (AP): APIC ID: 1 | cpu2 (AP): APIC ID: 2 | cpu3 (AP): APIC ID: 3 | cpu4 (AP): APIC ID: 4 | cpu5 (AP): APIC ID: 5 | cpu6 (AP): APIC ID: 6 | cpu7 (AP): APIC ID: 7 | ioapic1 irqs 24-47 on motherboard | ioapic0 irqs 0-23 on motherboard I'm pretty sure that this is a 2 x 4 machine (2 CPU packages with 4 cores per package), not 1 x 8. That's what the BIOS displays during POST. I'm not sure if this is just a "cosmetic" issue, or if this is a critical thing ... I could imagine that performance might be sub-optimal if the CPU topology isn't detected correctly, but I'm not sure if FreeBSD can take advantage of the topology. Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd "A misleading benchmark test can accomplish in minutes what years of good engineering can never do." -- Dilbert (2009-03-02)