Hi, We by default turn on the HW coordination. For most of the modern Intel CPUs, the P-state setting, hw.acpi.cpu.px_domX, only puts the upper limit of the CPUs frequency; e.g. CPU may run @1000Mhz even if the P-state is set to 2000Mhz, when the system is idle. As far as I tested, most of the power saving of the Intel CPUs are from deep C-state instead of P-state (see powerd man page, -c option). And I normally disable CPU frequency adjustment by passing -f to powerd.
You can check your CPU running frequency w/ 'systat -sens 1'; I think aperf is in GENERIC kernel. Thanks, sephe On Wed, Jul 5, 2017 at 1:33 AM, Brandon Werner <[email protected]> wrote: > Hello, > I recently got a new machine with Skylake and one of the technologies > advertised is hardware Pstates. From what I could tell Linux and Windows > support this technology but I couldn't find anything about the BSD's. I must > admit I don't clearly understand the technology but I guess my questions are > basically whether DragomFly supports these and if not will battery life be > worse. Also is it still reccommended to use powerd to scale the cpu for > saving battery on these CPU's? Thanks for the help. -- Tomorrow Will Never Die
