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Tag :
cpu
Link:
🔍 See Original Answer on Ask Ubuntu ⧉ 🔗
URL:
https://askubuntu.com/q/1064309
Title:
Cpufrequtils available frequencies
ID:
/2018/08/10/Cpufrequtils-available-frequencies
Created:
August 10, 2018
Edited: August 19, 2018
Upload:
September 15, 2024
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Intel has stopped publishing available frequencies but you can approximate what they are:
Use these commands to see available steps and min/max:
$ cd /sys/devices/system/cpu/intel_pstate
$ paste <(ls *) <(cat *) | column -s $'\t' -t
max_perf_pct 100
min_perf_pct 22
no_turbo 0
num_pstates 28
status active
turbo_pct 33
$ cd /sys/devices/system/cpu/cpu0/cpufreq
$ paste <(ls *) <(cat *) | column -s $'\t' -t
affected_cpus 0
cpuinfo_max_freq 3500000
cpuinfo_min_freq 800000
cpuinfo_transition_latency 4294967295
energy_performance_available_preferences default performance balance_performance balance_power power
energy_performance_preference balance_performance
related_cpus 0
scaling_available_governors performance powersave
scaling_cur_freq 1939478
scaling_driver intel_pstate
scaling_governor powersave
scaling_max_freq 3500000
scaling_min_freq 800000
scaling_setspeed <unsupported>
From this answer I just posted on Stack Exchange: Get all available frequency steps copy and paste this function into your terminal:
ApproximateFrequencies () {
NumSteps=$(cat /sys/devices/system/cpu/intel_pstate/num_pstates)
MinFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq)
MaxFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq)
LastFreq=$MinFreq
StepRate=$((( $MaxFreq - $MinFreq ) / $NumSteps))
for ((n=0;n<=$NumSteps;n++)); do
echo $LastFreq
LastFreq=$(( $LastFreq + $StepRate))
done
}
Then use this to display frequencies:
$ ApproximateFrequencies | column
800000 1089284 1378568 1667852 1957136 2246420 2535704 2824988 3114272 3403556
896428 1185712 1474996 1764280 2053564 2342848 2632132 2921416 3210700 3499984
992856 1282140 1571424 1860708 2149992 2439276 2728560 3017844 3307128
If you don’t have column installed then omit | column portion of command.