Among the many new features coming in Linux 6.3 — including many AMD additions — is the AMD P-State EPP “Energy Performance Preference” support being merged for modern Ryzen and EPYC systems. AMD P-State EPP can further help tune the performance and power efficiency of AMD Linux systems beyond the existing basic AMD P-State driver support and address some existing deficiencies. Here are some benchmarks of the AMD P-State and ACPI CPUFreq driver configurations benchmarked on an EPYC Milan-X server with the in-development Linux 6.3 kernel.

Using the mature AMD Daytona reference server with two EPYC 7773X “Milan X” processors I benchmarked the generic ACPI CPUFreq driver, AMD P-State, and AMD P-State EPP in the various configurations for seeing the impact on the overall CPU power consumption and performance s a result of these CPU f