blob: 3b059fd70877984e212e6b1ff96e2abd4418c4b1 (
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#!/bin/sh
set -eu
usage() {
generators="$1"
# example: USAGE: ./governor.sh <performance|powersave>
echo "USAGE: $0 <$(echo "$generators" | tr ' ' '|')>"
exit 111
}
for cpu in "/sys/devices/system/cpu/cpu"[0-9]* ; do
if grep -vq '^1$' "$cpu/online" 2>/dev/null; then
continue
fi
if [ ! -e "$cpu/cpufreq/scaling_available_governors" ]; then
continue
fi
generators="$(cat "$cpu/cpufreq/scaling_available_governors")"
if [ "$#" -eq 0 ] || [ -z "$1" ]; then
usage "$generators"
elif (echo -n "$generators" | tr ' ' '\n' | grep -q "^$1\$" 2>/dev/null); then
if grep -vq "^$1\$" "$cpu/cpufreq/scaling_governor" 2>/dev/null; then
echo "$1" > "$cpu/cpufreq/scaling_governor"
fi
else
usage "$generators"
fi
done
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