Disable AMDs CPU-scaling (AMD cool and quiet)


amdOur centos system with AMD Cool and Quite activated seems to be slower under load than without cpu scaling.

Another point is running a vmware server on such a host – will this feature work probably?

Follow these steps to turn it off, just to make sure 😉

To immediate turn off on running system:

  1. cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

    should return “ondemand”

  2. echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

    to deactivate this feature

  3. cat /proc/cpuinfo

    should show the full cpu clock speed

To make these changes permanent:

  1. cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_governors

    to see available options

  2. change
    GOVERNOR=  # default setting

    to

    GOVERNOR=performance

    this makes the change persistent to next reboot


About NhocConan

A super lazy guy who tries to write tech blog entries in English.He is lazy, so he can only write when he is in a good mood or when he is tired of coding.

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