Date: Fri, 20 Feb 2009 00:30:04 +0100 From: martinko <gamato@users.sf.net> To: freebsd-stable@freebsd.org Subject: What is the real number of CPUs ? -- was: Re: Problem with new Intel DX board and i7 Processor on reboot attempt (locks) Message-ID: <gnkq1s$d3i$1@ger.gmane.org> In-Reply-To: <200902182230.n1IMUg78008294@lava.sentex.ca> References: <499C4E8E.1020403@denninger.net> <200902182230.n1IMUg78008294@lava.sentex.ca>
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Mike Tancsa wrote: > At 01:08 PM 2/18/2009, Karl Denninger wrote: >> Running 7-STABLE, compiled last night. >> >> When attempting to reboot the system freezes at "stopping other CPUs" >> and has to be hard-reset with either the power button or the RESET >> switch. The problem is easily reproduced - typing "reboot" produces >> it :-) >> >> I'm wondering if that ACPI warning in the boot sequence is involved in >> this, and if so, if there is a recommended workaround? >> >> Here's the "dmesg" from the subject system: > > Hi, > I have the same chipset, but dont see the reboot problem on > RELENG_7 from Jan 7th. (via "shutdown -r now") Have you checked for > BIOS updates ? > > ---Mike > > > CPU: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (2666.77-MHz > 686-class CPU) > Origin = "GenuineIntel" Id = 0x106a4 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=0x98e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,POPCNT> > > AMD Features=0x28100000<NX,RDTSCP,LM> > AMD Features2=0x1<LAHF> > Cores per package: 8 > Logical CPUs per core: 2 > real memory = 3212734464 (3063 MB) > avail memory = 3139563520 (2994 MB) > ACPI APIC Table: <INTEL DX58SO > > FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs > 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 > ACPI Warning (tbfadt-0505): Optional field "Pm2ControlBlock" has zero > address or length: 0 450/0 [20070320] > ioapic0 <Version 2.0> irqs 0-23 on motherboard > Hi, I don't get the numbers of CPUs -- AFAIK Core i7 has 4 cores with 2 logical CPUs per core (hyper-threading?) and that makes 8 logical CPUs. Above I see 8 cores per package (!) _but_ 8 x 2 = 16 while only 8 CPUs are detected and started. Could someone explain pls ? Cheers, M.
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