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    Command:

    chcpu

    
    
    

    SYNOPSIS

           chcpu [-e] [-d] [-c] [-g] cpu-list
           chcpu [-p] mode
           chcpu -r
           chcpu [-h] [-V]
    
    
    

    DESCRIPTION

           chcpu  can  modify  the  state of CPUs.  It can enable or disable CPUs,
           scan for new CPUs, change the CPU dispatching mode  of  the  underlying
           hypervisor,  and request CPUs from the hypervisor (configure) or return
           CPUs to the hypervisor (deconfigure).
    
           Some options have a cpu-list argument.  Use this argument to specify  a
           comma-separated  list  of  CPUs.   The  list can contain individual CPU
           addresses or ranges of addresses.  For example,  0,5,7,9-11  makes  the
           command  applicable  to the CPUs with the addresses 0, 5, 7, 9, 10, and
           11.
    
    
    

    OPTIONS

           -r, --rescan
                  Trigger a rescan of CPUs.  Use this option on  systems  that  do
                  not  automatically detect newly attached CPUs.  The Linux kernel
                  then recognizes the new CPUs.
    
           -c, --configure cpu-list
                  Configure all specified CPUs.  Configuring a CPU means that  the
                  hypervisor  takes  a CPU from the CPU pool and assigns it to the
                  virtual hardware on which your kernel runs.
    
           -e, --enable cpu-list
                  Enable all specified CPUs.  Enabling a CPU means that the kernel
                  sets it online.  A CPU must be configured, see -c, before it can
                  be enabled.
    
           -p, --dispatch mode
                  Set the CPU dispatching mode (polarization).  This option has an
                  effect only if your hardware architecture and hypervisor support
                  CPU polarization.  Available modes are:
    
                         horizontal  The workload is spread across  all  available
                                     CPUs.
                         vertical    The workload is concentrated on few CPUs.
    
           -d, --disable cpu-list
                  Disable all specified CPUs.  Disabling a CPU means that the ker-
                  nel sets it offline.
    
           -g, --deconfigure cpu-list
                  Deconfigure all specified CPUs.  Deconfiguring a CPU means  that
                  the  hypervisor  removes  the  CPU  from the virtual hardware on
                  which the Linux instance runs and returns it to the CPU pool.  A
                  CPU must be offline, see -d, before it can be deconfigured.
    
           lscpu(1)
    
    
    

    AVAILABILITY

           The  chcpu  command  is part of the util-linux package and is available
           from Linux Kernel Archive
    
    
    

    Linux June 2012 CHCPU(8)

    
    
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