But I found amd_pstate_epp performance to be similar as amd-pstate ondemand.
According to my tests here(https://forum.garudalinux.org/t/discussing-linux-kernels-for-garuda-linux/):
The xanmod kernel using amd-pstate gives more battery, and the overall temperature seems lower than the linux-bore kernel with amd_pstate_epp.