It is normally always preferable to use the intel-pstate driver compared to pcc-cpufreq or acpi-cpufreq on modern Intel hardware.
Some HP ProLiant platforms implement the PCC interface [1] which can be disabled by a BIOS setting in which case the PCC driver will not load and the acpi-cpufreq driver can be used instead. The intel-pstate driver is presumed to be better for Sandybridge CPUs and later. Unlike the the cpufreq drivers, it uses P-states rather than cpu frequency [2]. It also has access to CPU performance metrics so in theory it has finer control than the traditional BIOS table driven frequency scaling. So for HP Proliants that are pre-Sandybridge, pcc-cpufreq may be the best bet, providing the firmware is doing the right thing. If not, acpi- cpufreq maybe better, as long as the BIOS has the correct control data in the ACPI tables. [1] Processor Clocking Control, https://acpica.org/sites/acpica/files/Processor-Clocking-Control-v1p0.pdf [2] https://events.static.linuxfound.org/sites/events/files/slides/LinuxConEurope_2015.pdf -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1806012 Title: set-cpufreq: 'powersave' governor configuration sanity on ubuntu server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1806012/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
