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public:script_for_controlling_intel_cpu_frequencies [2019/07/31 10:30] (current)
fangfufu created
Line 1: Line 1:
 +====== Scripts for controlling Intel CPU frequency ======
 +My laptop is a Lenovo T440p with a i7-4900MQ. I run Folding@Home on two of my CPU cores. The CPU constantly overheats, and my fan is always spinning at 4440 RPM. I find the noise annoying. Here is what I have done to alleviate the problem. ​
 +
 +===== Enable or disable Intel Turbo Boost(TM) =====
 +<code bash>
 +#!/bin/bash
 +    echo "Intel Turbo Boost(TM) Status:"​
 +    if [[ $1 == "​off"​ ]]; then
 +        echo 1 > /​sys/​devices/​system/​cpu/​intel_pstate/​no_turbo
 +    fi
 +    if [[ $1 == "​on"​ ]]; then
 +        echo 0 > /​sys/​devices/​system/​cpu/​intel_pstate/​no_turbo
 +    fi
 +
 +    state=$( cat /​sys/​devices/​system/​cpu/​intel_pstate/​no_turbo )
 +    if [[ $state -eq 1 ]]; then
 +        echo "​Off"​
 +    else
 +        echo "​On"​
 +    fi
 +
 +</​code>​
 +
 +===== Setting maximum CPU frequency =====
 +<code bash>
 +#!/bin/bash
 +
 +if ! [[ -z $@ ]]; then
 +  for i in {0..7} ; do
 +    echo $@00000 > /​sys/​devices/​system/​cpu/​cpufreq/​policy${i}/​scaling_max_freq
 +  done
 +fi
 +
 +cpufreq-info | grep "​current policy"​ | head -1 | cut -d ' ' -f 3-
 +</​code>​
 +
 +===== Setting CPU frequency governor =====
 +<code bash>
 +#!/bin/bash
 +if ! [[ -z $@ ]]; then
 +  for i in {0..7} ; do
 +    cpufreq-set -c $i -g $@
 +  done
 +fi
 +
 +cpufreq-info | grep "The governor"​ | head -1 | cut -d ' ' -f 19-
 +</​code>​
 +
  
  • public/script_for_controlling_intel_cpu_frequencies.txt
  • Last modified: 2019/07/31 10:30
  • by fangfufu