cpuid-etallen

CPUID(1)                    General Commands Manual                   CPUID(1)



NAME
       cpuid - Dump CPUID information for each CPU

SYNOPSIS
       cpuid [options...]

DESCRIPTION
       cpuid dumps detailed information about the CPU(s) gathered from the
       CPUID instruction, and also determines the exact model of CPU(s) from
       that information.

       It dumps all information available from the CPUID instruction.  The
       exact collection of information available varies between manufacturers
       and processors.  The following information is available consistently on
       all modern CPUs:

            vendor_id
            version information (1/eax)
            miscellaneous (1/ebx)
            feature information (1/ecx)

       It also produces synthetic fields based on information from multiple
       CPUID functions.  Currently, the synthetic fields are the exact model
       of each CPU (but see LIMITATIONS below) as (synth); the multiprocessing
       characteristics including the number of cores per chip (c) and the
       number of hyperthreads per core (t) as (multi-processing synth); and a
       decoding of the APIC physical ID as (APIC synth).

       The determination of the model is based on the following information:

            version information (1/eax), processor type
            version information (1/eax), family
            version information (1/eax), model
            version information (1/eax), stepping id
            version information (1/eax), extended family
            version information (1/eax), extended model
            feature information (1/ecx), virtual machine extensions
            brand id (1/ebx)
            brand (0x80000004)
            cache and TLB information (2)
            deterministic cache parameters (4/eax), extra processor cores
            AMD extended brand id (0x80000001/ebx)
            AMD extended processor signature (0x80000001/eax)
            Transmeta processor revision ID (0x80860001/ebx & ecx)

       The determination of the multiprocessing characteristics and decoding
       of APIC physical ID is based on the following information:

            feature information (1/edx), hyper-threading / multi-core supported
            miscellaneous (1/ebx), cpu count
            deterministic cache parameters (4/eax), extra processor cores on this die
            x2APIC features / processor topology (0xb)
            AMD feature flags (0x80000001/ecx)
            AMD Logical CPU cores (0x80000008/ecx), number of logical CPU cores - 1

       In addition, a simpler and coarser determination of the CPU is
       performed using only the information listed above under version
       information (1/eax).  It is provided as (simple synth) under version
       information (1/eax).  However, it tends to be unable to distinguish
       between various modern CPUs.

OPTIONS
       cpuid accepts the following command line arguments:

       -1, --one-cpu
               Display information only for the first CPU.  This cuts down on
               the output on a multiprocessor system, and is useful when
               certain that all CPUs are identical.

       -f FILE, --file=FILE
               Read raw hex information from FILE instead of from executions
               of the cpuid instruction.  If the filename is '-', instead read
               from standard input.

       -h, -H, --help
               Display help information.

       -i, --inst
               Use the CPUID instruction.  The information it provides is
               reliable.  It is not necessary to be root to use this option.
               (This option is the default.)

       -k, --kernel
               Use the CPUID kernel module.  The information does not seem to
               be reliable on all combinations of CPU type and kernel version.
               Typically, it is necessary to be root to use this option.

       -r, --raw
               Display only raw hex information with no decoding.

       -v, --version
               Display cpuid version.

LIMITATIONS
       There are numerous cases where there is no way to distinguish between
       various CPUs in the (synth) information.  In some cases, the sizes of
       caches, number of cores, brand strings, etc., can be used to
       distinguish multiple CPUs with the same family and model.  But there
       are cases where that information is insufficient.  Whenever cpuid is
       unable to distinguish between multiple CPUs, it will list all known
       possibilities.

       If you believe that a certain processor should be distinguishable from
       another and it isn't, please inform the author of this tool.

       The (multi-processing synth) information is unreliable on many
       processors.  It faithfully reports the information provided by the
       CPUID instruction and decodes it as recommended by the processor
       manufacturers, but often that information is incorrect.  The
       information seems to indicate the architecture's capabilities, rather
       than what the particular chip actually does.  In particular, it seems
       commonplace to claim the presence of multiple hyperthreads when there
       is only one.

INFORMATION SOURCES
       Information on the CPUID instruction and on specific CPUs is available
       from the following documents from Intel Corporation
       <http://www.intel.com/support/processors/index.htm>, with the specified
       Document Numbers:

              241618: Intel Processor Identification and the CPUID
              Instruction, Application Note 485
              242480: Pentium Processor Specification Update
              242689: Pentium Pro Processor Specification Update
              243326: 60- and 66-MHz Pentium Processor Specification Update
              243337: Intel Pentium II Processor Specification Update
              243748: Intel Celeron Processor Specification Update
              243776: Intel Pentium II Xeon Processor Specification Update
              243887: Mobile Intel Pentium II Processor Specification Update
              244444: Mobile Intel Celeron Processor at 466 MHz, 433 MHz, 400
              MHz, 366 MHz, 333 MHz, 300 MHz, and 266 MHz Specification Update
              244453: Intel Pentium III Processor Specification Update
              244460: Intel Pentium III Xeon Processor Specification Update
              245306: Mobile Intel Pentium III Processor and Mobile Intel
              Pentium III Processor-M Specification Update
              245421: Mobile Intel Celeron Processor (0.18u and 0.13u)
              Specification Update
              249199: Intel Pentium 4 Processor Specification Update
              249678: Intel Xeon Processor Specification Update
              250721: Mobile Intel Pentium 4 Processor-M Specification Update
              251309: Mobile Intel Celeron Processor on .13 Micron Process in
              Micro-FCPGA Package Specification Update
              252665: Intel Pentium M Processor Specification Update
              253176: Mobile Intel Pentium 4 Processor with 533 MHz System Bus
              Specification Update
              253666: 64 and IA-32 Architectures Software Developer's Manual
              Volume 2A: Instruction Set Reference, A-M.
              276613: Detecting Multi-Core Processor Topology in an IA-32
              Platform by Khang Nguyen and Shihjong Kuo
              290741: Intel Xeon Processor MP Specification Update
              290749: Intel Celeron Processor in the 478-Pin Package
              Specification Update
              300303: Intel Celeron M Processor Specification Update
              302209: Intel Pentium M Processor on 90nm Process with 2-MB L2
              Cache Specification Update
              302352: Intel Pentium 4 Processor on 90 nm Process Specification
              Update
              302354: Intel Celeron D Processor 3xx Sequence Specification
              Update
              302402: Intel Xeon Processor with 800 MHz System Bus
              302441: Mobile Intel Pentium 4 Processor supporting Hyper-
              Threading Technology on 90-nm process technology Specification
              Update
              306752: 64-bit Intel Xeon Processor MP with 1 MB L2 Cache
              Specification Update
              306757: 64-bit Intel Xeon Processor MP with up to 8 MB L3 Cache
              Specification Update
              306832: Intel Pentium Processor Extreme Edition and Intel
              Pentium D Processor Specification Update
              309159: Dual-Core Intel Xeon Processor 2.80 GHz Specification
              Update
              309222: Intel Core Duo Processor and Intel Core Solo Processor
              on 65 nm Process Specification Update
              309627: Dual-Core Intel Xeon Processor 7000 Sequence
              Specification Update
              311827: Intel Celeron D Processor 300 Sequence Specification
              Update
              313065: Dual-Core Intel Xeon Processor 5000 Series Specification
              Update
              313279: Intel Core 2 Extreme Processor X6800 and Intel Core 2
              Duo Desktop Processor E6000 Sequence Specification Update
              313356: Dual-Core Intel Xeon Processor 5100 Series Specification
              Update
              314554: Dual-Core Intel Xeon Processor 7100 Series Specification
              Update
              314916: Dual-Core Intel Xeon Processor 3000 Series Specification
              Update
              313515: Intel Pentium Dual-Core Processor Specification Update
              316134: Quad-Core Intel Xeon Processor 3200 Series Specification
              Update
              316964: Intel Celeron Processor 400 Series Specification Update
              316982: Intel Pentium Dual-Core Desktop Processor E2000 Series
              Specification Update
              317667: Intel Celeron Processor 500 Series Specification Update
              318081: Intel Xeon Processor 7200 and 7300 Series Specification
              Update
              318547: Intel Celeron Processor 200 Sequence Specification
              Update
              318585: Intel Xeon Processor 5400 Series Specification Update
              318586: Intel Xeon Processor 5200 Series Specification Update
              318727: Intel Core 2 Extreme Processor QX9000 Series and Intel
              Core 2 Quad Processor Q9000, Q9000S, Q8000, Q8000S Series
              Specification Update
              318733: Intel Core 2 Duo Processor E8000 and E7000 Series
              Specification Update
              318915: Intel Core 2 Duo Processor and Intel Core 2 Extreme
              Processor on 45-nm Process Specification Update
              318925: Intel Celeron Dual-Core Processor E1000 Series
              Specification Update
              319006: Dual-Core Intel Xeon Processor 3100 Series Specification
              Update
              319007: Quad-Core Intel Xeon Processor 3300 Series Specification
              Update
              319129: Intel Core 2 Extreme Processor QX9775 Specification
              Update
              319433: Intel Architecture Instruction Set Extensions
              Programming Reference
              319536: Intel Atom Processor Z5xx Series Specification Update
              319735: Intel Celeron Dual-Core Processor T1x00 Series
              Specification Update
              319978: Intel Atom Processor 200 Series Specification Update
              320047: Intel Atom Processor N270 Series Specification Update
              320121: Intel Core 2 Extreme Quad-Core Mobile Processor, Intel
              Core 2 Quad Mobile Processor, Intel Core 2 Extreme Mobile
              Processor, Intel Core 2 Duo Mobile Processor, Intel Core 2 Solo
              Mobile Processor and Intel Celeron Processor on 45-nm Process
              Specification Update
              320257: Intel EP80579 Integrated Processor Product Line
              Specification Update
              320336: Intel Xeon Processor 7400 Series Specification Update
              320468: Intel Pentium Dual-Core E6000 and E5000 Series
              Specification Update
              320529: Intel Atom Processor 300 Series Specification Update
              320767: Intel Core i7-900 Mobile Processor Extreme Edition
              Series, Intel Core i7-800 and i7-700 Mobile Processor Series
              Specification Update
              320836: Intel Core i7-900 Desktop Processor Extreme Edition
              Series and Intel Core i7-900 Desktop Processor Series
              Specification Update
              321324: Intel Xeon Processor 5500 Series Specification Update
              321333: Intel Xeon Processor 3500 Series Specification Update
              322166: Intel Core i7-800 and i5-700 Desktop Processor Series
              Specification Update
              322373: Intel Xeon Processor 3400 Series Specification Update
              322568: Intel Celeron Processor E3x00 Series Specification
              Update
              322849: Intel Atom Processor N400 Series Specification Update
              322861: Intel Atom Processor D400 Series (Single Core)
              Specification Update
              322862: Intel Atom Processor D500 Series (Dual Core)
              Specification Update
              322814: Intel Core i7-600, i5-500, i5-400 and i3-300 Mobile
              Processor Series Specification Update
              322911: Intel Core i5-600, i3-500 Desktop Processor Series and
              Intel Pentium Processor G6950 Specification Update
              323056: Intel Xeon Processor L3406 Specification Update
              323179: Intel Core i7-660UE, i7-620LE/UE, i7-610E, i5-520E,
              i3-330E and Intel Celeron Processor P4505, U3405 Series
              Datasheet Addendum Specification Update
              323105: Intel Xeon Processor C5500/C3500 Series Specification
              Update
              323254: Intel Core i7-900 Desktop Processor Extreme Edition
              Series and Intel Core i7-900 Desktop Processor Series on 32-nm
              Process Specification Update
              323338: Intel Xeon Processor 3600 Series Specification Update
              323344: Intel Xeon Processor 7500 Series Specification Update
              323372: Intel Xeon Processor 5600 Series Specification Update
              323874: Intel Pentium P6000 and U5000 Mobile Processor Series
              Specification Update
              324209: Intel Atom Processor E6xx Series Specification Update
              324341: Intel Atom Processor N500 Series Specification Update
              Intel 64 Architecture Processor Topology Enumeration
              (Whitepaper) by Shih Kuo
              324456: Intel Celeron Mobile Processor P4000 and U3000 Series
              Specification Update
              324643: 2nd Generation Intel Core Processor Family Desktop
              Specification Update
              324827: 2nd Generation Intel Core Processor Family Mobile
              Specification Update
              325122: Intel Xeon Processor E7-8800 / 4800 / 2800 Product
              Families Specification Update
              325307: Intel Atom Processor Z600 Series Specification Update
              325462: Intel 64 and IA-32 Architectures Software Developer's
              Manual Combined Volumes: 1, 2A, 2B, 2C, 3A, 3B, and 3C
              325630: Intel Atom Processor Z6xx Series Specification Update
              326140: Intel Atom Processor N2000 and D2000 Series
              Specification Update
              326198: Intel Core i7 Processor Family for the LGA-2011 Socket
              Specification Update
              326510: Intel Xeon Processor E5 Family Specification Update
              326766: Desktop 3rd Generation Intel Core Processor Family
              Specification Update
              326770: Mobile 3rd Generation Intel Core Processor Family
              Specification Update
              326774: Intel Xeon Processor E3-1200 v2 Product Family
              Specification Update
              327335: Intel Xeon and Intel Core Processors For Communications
              Infrastructure Specification Update
              328105: Intel Atom Processor Z2760 Specification Update
              328198: Intel Atom Processor S1200 Product Family for
              Microserver Specification Update
              328205: Intel Xeon Phi Coprocessor x100 Product Family
              Specification Update
              328899: Desktop 4th Generation Intel Core Processor Family
              Specification Update
              328903: Mobile 4th Generation Intel Core Processor Family
              Specification Update
              328908: Intel Xeon Processor E3-1200 v3 Product Family
              Specification Update
              329376: Intel Xeon E3-1125C v2, E3-1105C v2, Intel Core 3115C
              and Intel Pentium Processor B925C Specification Update
              329460: Intel Atom Processor C2000 Product Family Specification
              Update
              329597: Intel Xeon Processor E7 v2 Product Family Specification
              Update
              329676: Intel Quark SoC X1000 Datasheet
              330785: Intel Xeon Processor E5 v3 Product Family Specification
              Update
              330836: 5th Generation Intel Core Processor Family, Intel Core M
              Processor Family, Mobile Intel Pentium Processor Family, and
              Mobile Intel Celeron Processor Family Specification Update
              330841: Intel Core i7 Processor Family for LGA2011-v3 Socket
              Specification Update
              332054: Intel Xeon Processor D-1500 Product Family Specification
              Update
              332067: Intel Atom Z8000 Processor Series Specification Update
              332095: Intel N-Series Intel Pentium Processors and Intel
              Celeron Processors Specification Update
              332317: Intel Xeon Processor E7 v3 Product Family Specification
              Update
              332381: Mobile/Desktop 5th Generation Intel Core Processor
              Family Specification Update
              332689: 6th Generation Intel Core Processor Family Specification
              Update
              333133: Intel Xeon Processor E3-1200 v5 Product Family
              Specification Update
              333811: Intel Xeon Processor E5-2600 v4 Product Family
              Specification Update
              334165: Intel Xeon Processor E7-8800/4800 v4 Product Family
              Specification Update
              334208: Intel Core i7 Processor Family for LGA2011-v3 Socket
              Specification Update
              334525: Control-flow Enforcement Technology Preview
              334646: Intel Xeon Phi Processor x200 Product Family Preliminary
              Specification Update
              334663: 7th Generation Intel Processor Family Specification
              Update Supporting 7th Generation Intel Core Processor Families
              based on U/Y-Processor Line
              334820: Intel Pentium and Celeron Processor N- and J- Series
              Specification Update
              335252: 5-Level Paging and 5-Level EPT White Paper
              335718: Intel Xeon Processor E3-1200 v6 Product Family
              Specification Update
              335901: Intel Core X-Series Processor Family Specification
              Update
              336466: 8th Generation Intel Processor Family for S-Processor
              Platforms Specification Update
              336505: Intel Xeon Processor Scalable Family Specification
              Update
              336562: Intel Pentium Silver and Intel Celeron Processors
              Specification Update

       Information on the CPUID instruction and on specific CPUs is available
       from the following documents from Advanced Micro Devices, Inc.
       <http://www.amd.com/us-en/Processors/TechnicalResources>, with the
       specified Publication Numbers:

              20734: AMD Processor Recognition Application Note
              21266: AMD-K6 Processor Revision Guide Model 6
              21641: AMD-K6-2 Processor Revision Guide Model 8
              21846: AMD-K6 Processor Revision Guide Model 7
              22473: AMD-K6-III Processor Revision Guide Model 9
              23614: AMD Athlon Processor Model 4 Revision Guide
              23865: AMD Duron Processor Model 3 Revision Guide
              24332: AMD Athlon Processor Model 6 Revision Guide
              24806: AMD Duron Processor Model 7 Revision Guide
              25481: CPUID Specification
              25703: AMD Athlon Processor Model 8 Revision Guide
              25759: Revision Guide for AMD Athlon 64 and AMD Opteron
              Processors
              26094: BIOS and Kernel Developer's Guide for AMD Athlon 64 and
              AMD Opteron Processors
              27532: AMD Athlon Processor Model 10 Revision Guide
              31177H: AMD Geode NX Processors Data Book
              31610: Revision Guide for AMD NPT Family 0Fh Processors
              33234F: AMD Geode LX Processors Data Book
              41322: Revision Guide for AMD Family 10h Processors
              41788: Revision Guide for AMD Family 11h Processors
              44739: Revision Guide for AMD Family 12h Processors
              47534: Revision Guide for AMD Family 14h Models 00h-0Fh
              Processors
              48063: Revision Guide for AMD Family 15h Models 00h-0Fh
              Processors
              48931: Revision Guide for AMD Family 15h Models 10h-1Fh
              Processors
              51603: Revision Guide for AMD Family 15h Models 30h-3Fh
              Processors
              51810: Revision Guide for AMD Family 16h Models 00h-0Fh
              Processors
              53072: Revision Guide for AMD Family 16h Models 30h-3Fh
              Processors
              54945: Processor Programming Reference (PPR) for AMD Family 17h
              Model 01h, Revision B1 Processors
              55370: Revision Guide for AMD Family 15h Models 70h-7Fh
              Processors
              55766: Secure Encrypted Virtualization API Version 0.16
              Technical Preview

       Information on the CPUID instruction and on specific CPUs is available
       from the following documents from Transmeta Corporation
       <http://www.transmeta.com/crusoe_docs/Crusoe_CPUID_5-7-02.pdf>:

              Processor Recognition, 2002/05/07

       Information on generic hypervisor CPUID levels is available from this
       proposal: <http://lwn.net/Articles/301888/>.

       Information on KVM hypervisor CPUID levels is available from the Linux
       kernel under Documentation/kvm/cpuid.txt.

       Information on Microsoft hypervisor CPUID levels is available from the
       following documents from Microsoft: <https://docs.microsoft.com/en-
       us/virtualization/hyper-v-on-windows/reference/tlfs> and
       <http://msdn.microsoft.com/en-
       us/library/windows/hardware/ff542428%28v=vs.85%29.aspx>.

       Also, information is available from the following web sites:

              <http://www.sandpile.org/ia32/cpuid.htm>
              <http://en.wikipedia.org/wiki/List_of_Intel_microprocessors>
              <http://en.wikipedia.org/wiki/List_of_AMD_microprocessors>
              <http://en.wikipedia.org/wiki/Category:X86_microprocessors>

AUTHOR
       Todd Allen <cpuid@etallen.com>



20180519                          19 May 2018                         CPUID(1)