Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 16 Oct 2002 19:16:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 16 Oct 2002 19:16:20 -0400 Received: from s383.jpl.nasa.gov ([137.78.170.215]:29664 "EHLO s383.jpl.nasa.gov") by vger.kernel.org with ESMTP id ; Wed, 16 Oct 2002 19:16:17 -0400 Message-ID: <3DADF488.1080204@jpl.nasa.gov> Date: Wed, 16 Oct 2002 16:21:44 -0700 From: Bryan Whitehead Organization: Jet Propulsion Laboratory User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1) Gecko/20020826 X-Accept-Language: en-us, en, zh, zh-cn, zh-hk, zh MIME-Version: 1.0 To: root@chaos.analogic.com CC: Mark Cuss , linux-kernel@vger.kernel.org Subject: Re: Kernel reports 4 CPUS instead of 2... References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3187 Lines: 115 My /proc/cpuinfo says I have ht CPU's... but i only see 2 CPU's... (Yet I have 2 1.7Ghz XEONs in the box so shouldn't I see 4?) It's a Dell Precisions 530 workstation. Does intel have ht CPU's that are messed up? and I'm one of the "lucky ones". ? Building a kernel myself did not help... Any idea's? [driver@mulan ~]$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 1 model name : Intel(R) Xeon(TM) CPU 1.70GHz stepping : 2 cpu MHz : 1694.863 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : 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 ht tm bogomips : 3381.65 processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 1 model name : Intel(R) Xeon(TM) CPU 1.70GHz stepping : 2 cpu MHz : 1694.863 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : 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 ht tm bogomips : 3381.65 Richard B. Johnson wrote: > On Wed, 16 Oct 2002, Mark Cuss wrote: > > >>Hello all >> >>I'm working with a new Dell Poweredge 4600 Server with Dual CPUs. However, >>Linux reports that it sees 4 CPUs... I have opened the thing to see if Dell >>gave me 2 extras for free, but no luck: Attached is /proc/cpuinfo. >> >>I've tried the RedHat 8.0 stock kernel, as well as a freshly compiled 2.4.19 >>but both exhibit the same behavior. >> >>The specifics on the machine: >> >>Dual Xeon 2.2 GHz CPUs (512 k L2 cache) >>2 Gigs DDR RAM >>The chipset is a ServerWorks CMIC-HE (see attached lspci for complete >>listing). >> >>Has anyone else seen this behavior? The only other SMP machine I have is an >>older Dell server with Dual 1 GHz coppermines, and it reports 2 CPUs... >> >>Any information or advice is greatly appreciated... >> >>Thanks in Advance, >> >>Mark >> > > > This has become a FAQ. The processors are capable of so-called > "hyperthreading". They have two execution units, therefore seem > like two CPUs. > > This is the correct behavior. If you don't like this, you can > swap motherboards with me ;) Otherwise, grin and bear it! > > > Cheers, > Dick Johnson > Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips). > The US military has given us many words, FUBAR, SNAFU, now ENRON. > Yes, top management were graduates of West Point and Annapolis. > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Bryan Whitehead SysAdmin - JPL - Interferometry Systems and Technology Phone: 818 354 2903 driver@jpl.nasa.gov - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/