Why is ondemand not available as a governor for cpu frequency scaling?

Asked Feb 15 '17 at 22:13

Active Feb 15 '17 at 23:48

Viewed 1,678 times

Consider the following:

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors 
performance powersave
$ cat /proc/config.gz | gunzip | grep -i ondemand
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND=m

I do not understand why ondemand is not an available governor. Where else do I need to look and what do I need to do to enable ondemand?

edited Feb 15 '17 at 23:48

Gilles 'SO- stop being evil'

829,060

asked Feb 15 '17 at 22:13

What processor do you have? – Timothy Martin Feb 15 '17 at 22:25
@TimothyMartin Intel(R) Xeon(R) CPU E3-1241 v3 @ 3.50GHz – William Pursell Feb 15 '17 at 22:42
1

I asked about the processor because of this: https://wiki.archlinux.org/index.php/CPU_frequency_scaling#Scaling_governors. I believe the answer from @don_crissti is correct. – Timothy Martin Feb 15 '17 at 22:58
From https://www.kernel.org/doc/Documentation/cpu-freq/intel-pstate.txt, it seems that using powersave with the intel_pstate driver is similar to using ondemand. – William Pursell Feb 15 '17 at 23:00

Why is ondemand not available as a governor for cpu frequency scaling?

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