This PR adds a communicator that only handles neighborhood all-to-all communication. It implements the new interface collective_communicator, which provides different implementations for a selected set of collective mpi routines. Currently, this only includes the non-blocking all-to-all.
The communication uses a fixed pattern, i.e. the send/recv sizes are fixed when the neighborhood communicator is constructed. I would have liked to decouple that, but this would require some knowledge of how the sizes are stored at the interface level. If someone has an idea for that, please let me know.
This PR adds a communicator that only handles neighborhood all-to-all communication. It implements the new interface
collective_communicator, which provides different implementations for a selected set of collective mpi routines. Currently, this only includes the non-blocking all-to-all.The communication uses a fixed pattern, i.e. the send/recv sizes are fixed when the neighborhood communicator is constructed. I would have liked to decouple that, but this would require some knowledge of how the sizes are stored at the interface level. If someone has an idea for that, please let me know.
This is the first part of splitting up #1546.
Todo:
PR Stack: