# check turbo enabled or not 
[user@machine ~]$ cpupower frequency-info|egrep 'Supported|Active'
    Supported: no
    Active: no

# disbale turbo, where 0 means turbo is enabled and 1 means it is disabled.
echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo


$ sudo x86_energy_perf_policy --turbo-enable 1

$ cpupower frequency-info
   ...
  boost state support:
    Supported: yes <<-------
    Active: yes    <<-------

$ sudo x86_energy_perf_policy --turbo-enable 0

$ cpupower frequency-info
   ...
  boost state support:
    Supported: no <<-------
    Active: no    <<-------

# cpu scheduling strategy (tuned)
[user@machine ~]$  tuned-adm list

[user@machine ~]$ sudo cpupower monitor # show cpu freq by cores, can check P-cores and E-cores as well
    |Nehalem                    || Mperf              
CPU | C3   | C6   | PC3  | PC6  || C0   | Cx   | Freq 
   0|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   1|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   2|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   3|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   4|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   5|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   6|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   7|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   8|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
   9|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
  10|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
  11|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
  12|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
  13|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
  14|  0.00|  0.00|  0.00|  0.00|| 99.70|  0.30|  3610
  15|  0.00|  0.00|  0.00|  0.00|| 99.50|  0.50|  3610

# for the overclocked machine, the cpu always keep on a fixed freq even there is no load, otherwise, the freq variation amplitude is significant