On Fri, 2021-12-03 at 10:19 -0500, Stefan Monnier wrote: > > I get 'powersave' as default too. According to the ArchWiki site > > [1] > > modern Intel CPUs use the intel_pstate driver which selects > > 'powersave' > > by default, and it goes on to say: > > > > The intel_pstate driver supports only two governors: powersave > > and > > performance. Although they share the name with the generic > > governors, they do not work in the same way as the generic > > governors. > > Hmm... on my machine I don't have the `intel_pstate` loaded, > apparently. > Doing `modprobe intel_pstate` does nothing (no output, no error, > nothing > in `dmesg` either). Maybe my i3-4170 CPU is too old and it silently > bows out (and then some other part of the default config favors > `schedutil` over `powersave` when intel_pstate is not in use)?
The ArchWiki page [1] says of intel_pstate: This driver implements a scaling driver with an internal governor for Intel Core (Sandy Bridge and newer) processors. So yours is new enough. The docs on kernel.org [2] say it's Sandy Bridge too. On my kernel, the module is built-in to the kernel... $cat /lib/modules/$(uname -r)/modules.builtin | grep pstate kernel/drivers/cpufreq/intel_pstate.ko And its sysfs directory exists... $ ls -ld /sys/devices/system/cpu/intel_pstate drwxr-xr-x 2 root root 0 Dec 3 07:52 /sys/devices/system/cpu/intel_pstate [1] https://wiki.archlinux.org/title/CPU_frequency_scaling [2] https://www.kernel.org/doc/html/v4.19/admin-guide/pm/intel_pstate.html -- Tixy
