Scalability of communicators and groups in MPI
Humaira Kamal, Seyed M. Mirtaheri, Alan Wagner · 2010
As the number of cores inside compute clusters continues to grow, the scalability of MPI (Message Passing Interface) is important to ensure that programs can continue to execute on an ever-increasing number of cores. One important scalability issue for MPI is the implementation of communicators and groups. Communicators and groups are an integral part of MPI and play an essential role in the design and use of libraries. It is challenging to create an MPI implementation to support communicators and groups to scale to the hundreds of thousands of processes that are possible in today's clusters. In this paper we present the design and evaluation of techniques to support the scalability of communicators and groups in MPI.