HPC Project - solving the 2d heat equation using MPI

Prerequisites

The program needs the module PrgEnv-gnu to be loaded for compilation.

Compiling

The code can be compiled by using

make

The resulting binary is created in bin/heat_equation.out

Running

To run the binary file you need to specify the number of OpenMP threads by running

export OMP_NUM_THREADS=<number_threads_per_node>

And then run the program with

aprun -n <number_of_nodes> -d <number_of_cores_per_node> ./bin/heat_equation.out -x <grid_size_x> -y <grid_size_y> -X <nodes_x> -Y <nodes_y> -t <number_of_iterations> -k <diffusion_constant>

An additional command '-s' enables weak scaling which means that the grid size scales with the number of nodes.