Introduction

This page ilustrates MUSCLization of real astrophysics code  PIERNIK ("Gingerbread").

The orginal code

• monolitic
• fortran
• MPI/HDF5 dependency
• high scalability of the main MHD module
• propotype particule simulation Monte Carlo module
• coupling done via global variables

The goal

• couple using MUSCLE, why?
  • the coupling is done one way (from MHD to MC), this brings a potential of introducing new level of parallelism (in curent code MHD and MC simulations are called one after another, sequentially)
  • the MC is in process of GPU-enabling, one may want to run both modules on different heterogenous resources (i.e. MC on GPU cluster, base MHD code on Intel Nehalem cluster)

The code