Automated Distributed-memory Parallelism from Symbolic Specification in Devito

Automated Distributed-memory Parallelism has been added to Devito, a rapidly evolving framework adopted by a dynamic, heterogeneous and fast-growing community. The key innovations are the abstractions provided to the user and the compiler- based implementation approach, which we consider invaluable for long-term sustainable software to replace (partly or fully) obsolete, impenetrable, hardly extendable and often inefficient legacy code. The auto-tuner, which determines, among the other things, the best block shape for each tiled loop nest in an Operator, has already been tweaked to support DMP. Single-node multi-socket (one MPI process per socket) as well as Multi-node experiments, both weak and strong scaling, are planned for the near future.