From owner-freebsd-stable@FreeBSD.ORG Wed Apr 25 19:57:16 2007 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E322F16A401; Wed, 25 Apr 2007 19:57:15 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from server.baldwin.cx (66-23-211-162.clients.speedfactory.net [66.23.211.162]) by mx1.freebsd.org (Postfix) with ESMTP id 61E9813C468; Wed, 25 Apr 2007 19:57:15 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from localhost.corp.yahoo.com (john@localhost [127.0.0.1]) (authenticated bits=0) by server.baldwin.cx (8.13.8/8.13.8) with ESMTP id l3PJv7lu068823; Wed, 25 Apr 2007 15:57:08 -0400 (EDT) (envelope-from jhb@freebsd.org) From: John Baldwin To: Alex Povolotsky Date: Wed, 25 Apr 2007 15:57:02 -0400 User-Agent: KMail/1.9.6 References: <462F15B4.4010201@webmail.sub.ru> <200704251208.34248.jhb@freebsd.org> <462FA9E5.5010300@webmail.sub.ru> In-Reply-To: <462FA9E5.5010300@webmail.sub.ru> MIME-Version: 1.0 Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704251557.02688.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-2.0.2 (server.baldwin.cx [127.0.0.1]); Wed, 25 Apr 2007 15:57:08 -0400 (EDT) X-Virus-Scanned: ClamAV 0.88.3/3162/Wed Apr 25 14:43:55 2007 on server.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-4.4 required=4.2 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.1.3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on server.baldwin.cx Cc: FreeBSD Stable , freebsd-smp@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: 6.2-RELEASE does not use second CPU on pentium D 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, 25 Apr 2007 19:57:16 -0000 On Wednesday 25 April 2007 03:20:05 pm Alex Povolotsky wrote: > John Baldwin wrote: > > On Wednesday 25 April 2007 04:47:48 am Alex Povolotsky wrote: > > > >> Hello! > >> > >> I have a Pentium D box, running 6.2-RELEASE. In dmesg, I see CPU#1 > >> launched, but I never see any process running on it, and mptable shows > >> > >> cluster-one# mptable -verbose > >> > >> > >> > > =============================================================================== > > > >> MPTable > >> > >> looking for EBDA pointer @ 0x040e, found, searching EBDA @ 0x0009e800 > >> searching CMOS 'top of mem' @ 0x0009e400 (633K) > >> searching default 'top of mem' @ 0x0009fc00 (639K) > >> searching BIOS @ 0x000f0000 > >> > >> MP FPS found in BIOS @ physical addr: 0x000fe200 > >> > >> ------------------------------------------------------------------------------- > >> > >> MP Floating Pointer Structure: > >> > >> location: BIOS > >> physical address: 0x000fe200 > >> signature: '_MP_' > >> length: 16 bytes > >> version: 1.4 > >> checksum: 0x9f > >> mode: Virtual Wire > >> > >> ------------------------------------------------------------------------------- > >> > >> MP Config Table Header: > >> > >> physical address: 0x000fe210 > >> signature: 'PCMP' > >> base table length: 64 > >> version: 1.4 > >> checksum: 0x7f > >> OEM ID: '' > >> Product ID: '' > >> OEM table pointer: 0x00000000 > >> OEM table size: 0 > >> entry count: 1 > >> local APIC address: 0xfee00000 > >> extended table length: 0 > >> extended table checksum: 0 > >> > >> ------------------------------------------------------------------------------- > >> > >> MP Config Base Table Entries: > >> > >> -- > >> Processors: APIC ID Version State Family Model Step > >> Flags > >> 0 0x14 BSP, usable 15 6 4 > >> 0xbfebfbff > >> > >> > >> > > =============================================================================== > > > >> while in dmesg > >> > >> Copyright (c) 1992-2007 The FreeBSD Project. > >> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > >> The Regents of the University of California. All rights reserved. > >> FreeBSD is a registered trademark of The FreeBSD Foundation. > >> FreeBSD 6.2-RELEASE-p3 #2: Thu Apr 19 00:19:54 MSD 2007 > >> tarkhil@cluster-one.zinester.com:/usr/obj/usr/src/sys/P4D > >> WARNING: debug.mpsafenet forced to 0 as ipsec requires Giant > >> WARNING: MPSAFE network stack disabled, expect reduced performance. > >> Timecounter "i8254" frequency 1193182 Hz quality 0 > >> CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2808.41-MHz 686-class CPU) > >> Origin = "GenuineIntel" Id = 0xf64 Stepping = 4 > >> > >> > >> > > Features=0xbfebfbff > > >> ,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > >> Features2=0xe49d,> > >> AMD Features=0x20100000 > >> AMD Features2=0x1 > >> real memory = 1046757376 (998 MB) > >> avail memory = 1015095296 (968 MB) > >> ACPI APIC Table: > >> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs > >> cpu0 (BSP): APIC ID: 0 > >> cpu1 (AP): APIC ID: 1 > >> ioapic0: Changing APIC ID to 2 > >> ioapic0 irqs 0-23 on motherboard > >> > >> [...] > >> SMP: AP CPU #1 Launched! > >> > >> The kernel is, of course, SMP. > >> > >> What can I do, where can I search for solution? > >> > >> Second core IS enabled in BIOS > >> cluster-one# sysctl hw | grep cpu > >> hw.ncpu: 2 > >> hw.acpi.cpu.cx_supported: C1/0 > >> hw.acpi.cpu.cx_lowest: C1 > >> hw.acpi.cpu.cx_usage: 100.00% > >> cluster-one# sysctl machdep | grep cpu > >> machdep.cpu_idle_hlt: 1 > >> machdep.hlt_cpus: 2 > >> machdep.hlt_logical_cpus: 0 > >> machdep.logical_cpus_mask: 2 > >> > >> so second CPU is halted, attempt to start it with sysctl does not help > >> Alex. > >> > > > > It's seeing it as an HTT thread. Try > > changing 'machdep.hyperthreading_allowed'. > > > > > > Well, it is a Pentium D. It is supposed to have two cores, not just > hyperthreading! How can it be at all? Because multicores actually show up as HTT and you have to do extra work to figure out if they are really cores or threads, and apparently 6.2 gets it wrong on your machine. -- John Baldwin