bionic (1) likwid-setFrequencies.1.gz

NAME

       likwid-setFrequencies - print and manage the clock frequency of CPU cores

SYNOPSIS

       likwid-setFrequencies  [-hvplmp]  [-c  <cpu_list>]  [-g  <governor>]  [-f,--freq  <frequency>]  [-x,--min
       <min_freq>] [-y,--max <max_freq>]

DESCRIPTION

       likwid-setFrequencies is a command line application to set the clock frequency of CPU cores.  Since  only
       priviledged  users are allowed to change the frequency of CPU cores, the application works in combination
       with a daemon likwid-setFreq(1).  The daemon needs the  suid  permission  bit  to  be  set  in  order  to
       manipulate  the sysfs entries. With likwid-setFrequencies the clock of all cores inside a the cpu_list or
       affinity domain can be set to a specific frequency or governor at once.  likwid-setFrequencies works only
       with  the  kernel  module  acpi-cpufreq.   The recent intel_pstate module does not allow one to set fixed
       frequencies. In  order  to  deactivate  intel_pstate  add  'intel_pstate=disable'  to  your  kernel  boot
       commandline (commonly in grub) and load the acpi-cpufreq module.

OPTIONS

       -h     prints a help message to standard output, then exits.

       -p     prints the current frequencies for all CPU cores

       -l     prints all configurable frequencies

       -m     prints all configurable governors

       -c <cpu_list>
              set  the  affinity  domain  where  to  set the frequencies. Common are N (Node), SX (Socket X), CX
              (Cache Group X) and MX (Memory Group X).  For detailed  information  about  affinity  domains  see
              likwid-pin(1)

       -g <governor>
              set  the  governor  of  all  CPU cores inside the affinity domain. Current governors are ondemand,
              performance, turbo. Default is ondemand

       -f, --freq <frequency>
              set a fixed frequency at all CPU cores inside  the  affinity  domain.  Implicitly  sets  userspace
              governor for the cores.

       -x, --min <min_freq>
              set  a  fixed  minimal  frequency  at  all  CPU  cores  inside the affinity domain. Can be used in
              combination with a dynamic governor.

       -y, --max <max_freq>
              set a fixed maximal frequency at all CPU  cores  inside  the  affinity  domain.  Can  be  used  in
              combination with a dynamic governor.

AUTHOR

       Written by Thomas Roehl <thomas.roehl@googlemail.com>.

BUGS

       Report Bugs on <https://github.com/RRZE-HPC/likwid/issues>.

SEE ALSO

       likwid-pin(1), likwid-perfctr(1), likwid-powermeter(1)