51 lines
814 B
Plaintext
51 lines
814 B
Plaintext
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#!/bin/sh
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# set the HWP preference for all cpus in sysfs
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cpus="/sys/devices/system/cpu/cpu*/cpufreq/energy_performance_preference"
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usage() {
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script=${0##*/}
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echo
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echo "Invalid usage of ${script}!"
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echo
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echo "The following options are allowed"
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echo
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echo "-----------"
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echo "$script -1 : default"
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echo "$script 0 : power"
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echo "$script 1 : balance_power"
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echo "$script 2 : balance_performance"
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echo "$script 3 : performance"
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echo "-----------"
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echo
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exit 1
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}
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set_pref() {
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for cpu in $cpus; do
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echo "$1" > "$cpu"
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done
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}
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case "$1" in
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-1)
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set_pref "default"
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;;
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0)
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set_pref "power"
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;;
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1)
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set_pref "balance_power"
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;;
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2)
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set_pref "balance_performance"
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;;
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3)
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set_pref "performance"
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;;
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*)
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usage "invalid argument"
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esac
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