The x86_energy_perf_policy tool allows administrators to define the relative importance of performance and energy efficiency. It is provided by the kernel-tools package.
To view the current policy, run the following command:
# x86_energy_perf_policy -r
To set a new policy, run the following command:
# x86_energy_perf_policy profile_name
Replace profile_name with one of the following profiles.
- The processor does not sacrifice performance for the sake of saving energy. This is the default value.
- The processor tolerates minor performance compromises for potentially significant energy savings. This is a reasonable saving for most servers and desktops.
- The processor accepts potentially significant performance decreases in order to maximize energy efficiency.
For further details of how to use x86_energy_perf_policy, see the man page:
$ man x86_energy_perf_policy