Linux Kernel DVFS CPU Governor

Setup your environment for local testing

2. Download Ubuntu latest stable release (Ubuntu 16.04.3 LTS)
3. Install it
4. Log in, open a terminal, and run :

# should output your kernel version : 4.13.0-36-generic
uname -r

# install linux-source, linux-headers, and linux-image corresponding to your kernel version
sudo apt install linux-source-4.13.0
sudo apt install linux-headers-4.13.0-36-generic
sudo apt install linux-image-4.13.0-36-generic

# install python dependencies
sudo apt install python-pip
pip install pssh

# install utils that we'll use to switch CPU governor
sudo apt install cpufrequtils

5. You're done !

Build the project, and run it

The Makefile has a few tasks in it, that make it easier to run commands so don't have to type them everytime.

make build # compile the .c files & create the .ko (kernel object) patch file

make clean # clean all the compiled files (.o, etc...)o

make install # install the mod on your current VM (you need to build it first of course)

make remove # uninstall the mod

make log # show the kernel logs; just an alias for dmesg
make tail # stream kernel logs in real time; any new log will be displayed

make set # set your CPU frequency management governor

make unset # unset your CPU frequency management governor

So, a basic workflow when doing experiments should look like :

make build ; make install ; make set
make unset ; make remove

Run experiment on grid5000

Register an account on grid5000

https://www.grid5000.fr/mediawiki/index.php/Grid5000:Get_an_account

Connect to grid5000

Note : fore more informations on this part, you can also check the Getting Started guide of grid5000

# add in your ~/.ssh/config
Host g5k
        HostName access.grid5000.fr
        User your_user_name
        IdentityFile ~/.ssh/id_rsa  

Then to connect you'll type in your shell : ssh g5k

Deploy experiment and collect results

See README file in the deploy/ folder