On 2016.04.02 11:21 Sedat Dilek wrote: > On Sat, Apr 2, 2016 at 7:19 PM, Jörg Otte wrote: >> 2016-04-02 17:28 GMT+02:00 Srinivas Pandruvada wrote: >>> >>> If you are using Ubuntu, the OS has a script which will automatically >>> change from performance. >>> Doug can give more information on this script. > >> maybe: >> /etc/init.d/ondemand
Yes. > With CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y (linux-pm.git#linux-next) I > get... > > $ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver > acpi-cpufreq > acpi-cpufreq > acpi-cpufreq > acpi-cpufreq > > $ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor > ondemand > ondemand > ondemand > ondemand Yes, those are the expected results for the acpi-cpufreq CPU frequency scaling driver. You should be able to observe the governor set to sched util for the first minute after re-boot and/or if you set it yourself after the /etc/init.d/ondemand script has finished (i.e. more than 1 minute after re-boot.) > ...is there a difference when using intel_pstate as scaling_driver? Yes, but only because there are different available governors for the two drivers. > Are the scripts of Ubuntu working properly with acpi-cpufreq (only)? As far as I know the /etc/init.d/ondemand is working properly. It sets the acpi-cpufreq driver to use the "ondemand" governor and it sets the intel_pstate driver to use the "powersave" governor. ... Doug
