MPI30

MPI30, commonly written MPI-3.0, refers to the third major revision of the Message Passing Interface (MPI) standard used for parallel computing. It was developed by the MPI Forum and published in 2012 to update and extend the capabilities provided by MPI-2.x. The standard defines a portable, language-neutral API for distributed-memory parallelism and is intended to be implemented by high-performance libraries for C, C++, and Fortran.

Key features of MPI-3.0 include enhancements to one-sided communication (remote memory access), the introduction of nonblocking and persistent collective operations, and new communication patterns such as neighborhood collectives. It also improves dynamic process management, expands datatype and memory model support, and enhances the tool interface through MPI_T. Additional emphasis was placed on topology-aware communication and better interoperability with other standards, as well as improvements to usability and performance in a wide range of HPC environments.

Implementations and impact: MPI-3.0 is implemented by major MPI libraries, including Open MPI, MPICH, Intel MPI, MVAPICH, and Cray MPI, among others. It remains widely available in high-performance computing clusters and other large-scale computing platforms. While subsequent revisions such as MPI-3.1 and MPI-4.0 have been published, MPI-3.0 continues to influence legacy software and scenarios where its API and semantics align with performance goals or compatibility requirements.

See also: MPI (standard), MPICH, Open MPI, MVAPICH, Intel MPI.