Date: Wed, 25 Apr 2007 23:20:05 +0400 From: Alex Povolotsky <tarkhil@webmail.sub.ru> To: John Baldwin <jhb@freebsd.org> Cc: FreeBSD Stable <freebsd-stable@freebsd.org>, freebsd-smp@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: 6.2-RELEASE does not use second CPU on pentium D Message-ID: <462FA9E5.5010300@webmail.sub.ru> In-Reply-To: <200704251208.34248.jhb@freebsd.org> References: <462F15B4.4010201@webmail.sub.ru> <200704251208.34248.jhb@freebsd.org>
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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<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH > >> ,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> >> Features2=0xe49d<SSE3,RSVD2,MON,DS_CPL,EST,CNTX-ID,CX16,<b14>,<b15>> >> AMD Features=0x20100000<NX,LM> >> AMD Features2=0x1<LAHF> >> real memory = 1046757376 (998 MB) >> avail memory = 1015095296 (968 MB) >> ACPI APIC Table: <INTEL DG965SS > >> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs >> cpu0 (BSP): APIC ID: 0 >> cpu1 (AP): APIC ID: 1 >> ioapic0: Changing APIC ID to 2 >> ioapic0 <Version 2.0> 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? Alex.
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