lscpu - display information about the CPU architecture


   lscpu [-a|-b|-c] [-x] [-y] [-s directory] [-e[=list]|-p[=list]]
   lscpu -h|-V


   lscpu  gathers  CPU  architecture information from sysfs, /proc/cpuinfo
   and any applicable architecture-specific  libraries  (e.g.  librtas  on
   Powerpc).   The command output can be optimized for parsing or for easy
   readability by humans.  The  information  includes,  for  example,  the
   number  of CPUs, threads, cores, sockets, and Non-Uniform Memory Access
   (NUMA) nodes.  There is also information about the CPU caches and cache
   sharing, family, model, bogoMIPS, byte order, and stepping.

   In virtualized environments, the CPU architecture information displayed
   reflects the configuration of  the  guest  operating  system  which  is
   typically  different from the physical (host) system.  On architectures
   that support  retrieving  physical  topology  information,  lscpu  also
   displays  the  number  of  physical  sockets,  chips, cores in the host

   Options that result in an output table have a list argument.  Use  this
   argument  to  customize  the command output.  Specify a comma-separated
   list of column labels to limit the output table to only  the  specified
   columns,  arranged  in  the specified order.  See COLUMNS for a list of
   valid column labels.  The column labels are not case sensitive.

   Not all columns are supported on all architectures.  If an  unsupported
   column  is  specified, lscpu prints the column but does not provide any
   data for it.

   Note that topology elements  (core,  socket,  etc.)  use  a  sequential
   unique ID starting from zero, but CPU logical numbers follow the kernel
   where there is no guarantee of sequential numbering.

   CPU    The logical CPU number of a CPU as used by the Linux kernel.

   CORE   The logical core number.  A core can contain several CPUs.

   SOCKET The logical socket number.  A socket can contain several cores.

   BOOK   The logical book number.  A book can contain several sockets.

   DRAWER The logical drawer number.  A drawer can contain several books.

   NODE   The logical NUMA  node  number.   A  node  can  contain  several

   CACHE  Information about how caches are shared between CPUs.

          The physical address of a CPU.

   ONLINE Indicator  that shows whether the Linux instance currently makes
          use of the CPU.

          Indicator that shows if the hypervisor has allocated the CPU  to
          the  virtual  hardware  on  which the Linux instance runs.  CPUs
          that are configured can be set online  by  the  Linux  instance.
          This  column  contains  data  only  if  your hardware system and
          hypervisor support dynamic CPU resource allocation.

          This column contains  data  for  Linux  instances  that  run  on
          virtual  hardware  with  a  hypervisor  that  can switch the CPU
          dispatching mode (polarization).  The polarization can be:

          horizontal  The workload is spread across all available CPUs.

          vertical    The workload is concentrated on few CPUs.

          For vertical polarization, the column also shows the  degree  of
          concentration,  high, medium, or low.  This column contains data
          only  if  your  hardware  system  and  hypervisor  support   CPU

   MAXMHZ Maximum  megahertz  value for the CPU. Useful when lscpu is used
          as hardware inventory information gathering tool.   Notice  that
          the  megahertz  value  is  dynamic,  and  driven by CPU governor
          depending on current resource need.

   MINMHZ Minimum megahertz value for the CPU.


   -a, --all
          Include lines for online and offline CPUs in the output (default
          for -e).  This option may only be specified together with option
          -e or -p.

   -b, --online
          Limit the output to online CPUs (default for -p).   This  option
          may only be specified together with option -e or -p.

   -c, --offline
          Limit  the  output  to  offline  CPUs.   This option may only be
          specified together with option -e or -p.

   -e, --extended[=list]
          Display the CPU information in human-readable format.

          If the list argument is omitted, all columns for which  data  is
          available are included in the command output.

          When  specifying  the list argument, the string of option, equal
          sign (=),  and  list  must  not  contain  any  blanks  or  other
          whitespace.  Examples: '-e=cpu,node' or '--extended=cpu,node'.

   -h, --help
          Display help text and exit.

   -p, --parse[=list]
          Optimize the command output for easy parsing.

          If   the  list  argument  is  omitted,  the  command  output  is
          compatible with earlier versions of lscpu.  In  this  compatible
          format,  two  commas are used to separate CPU cache columns.  If
          no CPU caches are identified the cache column is omitted.
          If the list argument is used, cache columns are separated with a
          colon (:).

          When  specifying  the list argument, the string of option, equal
          sign (=),  and  list  must  not  contain  any  blanks  or  other
          whitespace.  Examples: '-p=cpu,node' or '--parse=cpu,node'.

   -s, --sysroot directory
          Gather  CPU  data  for  a Linux instance other than the instance
          from which the lscpu command is issued.  The specified directory
          is the system root of the Linux instance to be inspected.

   -x, --hex
          Use  hexadecimal  masks  for  CPU  sets  (for example 0x3).  The
          default is to print the sets in list format (for example 0,1).

   -y, --physical
          Display physical IDs for  all  columns  with  topology  elements
          (core,  socket,  etc.).   Other  than  logical  IDs,  which  are
          assigned by lscpu, physical  IDs  are  platform-specific  values
          that   are   provided  by  the  kernel.  Physical  IDs  are  not
          necessarily unique and they might not be arranged  sequentially.
          If  the  kernel  could not retrieve a physical ID for an element
          lscpu prints the dash (-) character.

          The CPU logical numbers are not affected by this option.

   -V, --version
          Display version information and exit.


   The basic overview of CPU family, model, etc. is always  based  on  the
   first CPU only.

   Sometimes in Xen Dom0 the kernel reports wrong data.

   On virtual hardware the number of cores per socket, etc. can be wrong.


   Cai Qian <>
   Karel Zak <>
   Heiko Carstens <>




   The  lscpu  command  is part of the util-linux package and is available


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