afreq.sh

afreq.sh

A simple daemon for setting cpu frequency governor

Inspired by auto-cpufreq, afreq.sh is a minimal daemon built on posix shell and core utils, it is intended to be extensible, lean and have the least amount of dependencies.

As of now afreq depends only on:

• core utils (grep, sleep, tail, awk) however busybox and other posix compliant utils will work
• built ins (printf, command)
• procps (vmstat, pgrep)

installation

Install everything:

sudo make install-all

this will provide:

component	default location	description
afreq	/usr/local/sbin/afreq	the actual daemon doing the work
acpufreq	/etc/init.d/acpufreq	sysvinit initscript
acpufreq.service	/etc/systemd/system/acpufreq.service	systemd unit

install config

Edit the config.mk file to tweak installation options.

SysV init script

This repo provides 2 sysvinit init scripts, a hand written one and one that uses Debian's init-d-script framework that provides a Debian and LSB compliant init.d script that may be preferred on some environments, you can choose with the config.mk file.

Usage

sysvinit

The makefile should put the script in /etc/init.d/acpufreq by default, after that a simple sudo update-rc.d acpufreq defaults should be enough to activate it for the next boot

The service script supports the standard actions.

A simple sudo service acpufreq start will initiate the daemon.

systemd

The makefile should put the unit in /etc/systemd/system/acpufreq.service by default, all you need is run sudo systemctl enable acpufreq to activate the service for the next boot.

Initiate the service with sudo systemctl start acpufreq

Currently afreq.sh is a proof of concept to demonstrate that such a program can be written in a real unix way (not reinventing the wheel, using the tools available), with the expectation that it may mature further.