Q about cpupower

jd1008 jd1008 at gmail.com
Sun Jun 28 19:41:07 UTC 2015


cpupower  frequency-set -f 2000MHz

reports that all cores have been set, and command exits with value 0.

But
/usr/bin/cpupower frequency-info
shows all cores still at lower current frequencies.

This is on a laptop with a dual core i5 with hyperthreading enabled.

Also, the info shows 2 cores at slightly different "allowable???" turbo 
frequencies.
See below.

# /usr/bin/cpupower frequency-info
analyzing CPU 0:
   driver: acpi-cpufreq
   CPUs which run at the same hardware frequency: 0
   CPUs which need to have their frequency coordinated by software: 0
   maximum transition latency: 10.0 us.
   hardware limits: 1.20 GHz - 2.67 GHz
   available frequency steps: 2.67 GHz, 2.67 GHz, 2.53 GHz, 2.40 GHz, 
2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 
1.33 GHz, 1.20 GHz
   available cpufreq governors: conservative, userspace, powersave, 
ondemand, performance
   current policy: frequency should be within 1.20 GHz and 2.67 GHz.
                   The governor "userspace" may decide which speed to use
                   within this range.
*current CPU frequency is 1.20 GHz (asserted by call to hardware).*
   boost state support:
     Supported: yes
     Active: yes
     2200 MHz max turbo 2 active cores
     2400 MHz max turbo 1 active cores




More information about the users mailing list