Installation

Clone or download the project. Open a terminal in this folder.

Run docker build -t my-gcc-app . to build the docker. It will automatically install MPI.

Running

Run docker. It will share the current folder with the docker instance in /host: put your code here.

docker run -it -v "$PWD":/host my-gcc-app

Then go in the shared folder:

cd /host

MPI

If you do not choose the name of your output file, it will be by default a.out mpic++ <name of your cpp file>

To choose your output file : (-o allows you to specifiy your output file ) mpic++ -o <name of output file> <name of your cpp file>

mpirun --allow-run-as-root ./a.out or mpirun --allow-run-as-root <name of output file> (because you are root on docker) TODO : create user and give correct permissions etc.

To run with multiple threads : mpirun --allow-run-as-root -n 4 ./a.out or mpirun --allow-run-as-root <name of output file>

OpenMP

g++ -fopenmp <name of your cpp file>

then

./a.out