eswak / dvfs-linux-kernel

M2 CSA Project : DVFS governor for linux kernel

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