Runtime Class

[ryanmrichard]

As far as an API goes I'm thinking:

/** @brief Provides programmatic access to the computer being run on.  *  */ struct Runtime { /// Initializes the runtime Runtime(); /// Gets the type-erased MPI Communicator std::any mpi_comm(); /// Returns the number of clusters (can have multiple clusters for inter-communicators) size_type size(); /// Gets the Cluster object associated with the runtime Cluster operator[](size_type i); /// Not sure what the arguments are, but should partition the runtime into smaller runtimes Runtime partition(); /// Tears down the runtime, releasing resources ~Runtime(); };

Key points:

• We want MPI to be fully encapsulated
• Initialization/tear-down should follow RAII
• Basically a container of Cluster objects

Questions:

• Does it make sense to have a single output file or something here? Or should users just capture stdout/err from all nodes?