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)