| #!/bin/sh |
| |
| # Copyright 2016 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| # A small script used to set the CPU governor to different values. |
| |
| # Check parameter |
| case $1 in |
| ondemand|performance|powersave) |
| ;; |
| *) |
| echo >&2 "Please use one of the following parameter: \ |
| powersave, ondemand, performance" |
| exit 1 |
| ;; |
| esac |
| |
| # Check that kondemand kernel thread is not running. |
| if $(pgrep -lf kondemand >/dev/null); then |
| echo >&2 "Sorry, kondemand kernel thread is running, cannot change CPU governor" |
| return |
| fi |
| |
| # Perform the change with sudo |
| sudo sh -c "\ |
| for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do \ |
| if [ -f \"\$CPUFREQ\" ]; then \ |
| echo -n $1 > \$CPUFREQ; \ |
| fi \ |
| done \ |
| " |