Summary The Exascale Computing Project (ECP) is currently the primary effort in the United
States focused on develo** “exascale” levels of computing capabilities, including …

The MPI multithreading model has been historically difficult to optimize; the interface that it
provides for threads was designed as a process-level interface. This model has led to …

The hybrid MPI+ X programming paradigm, where X refers to threads or GPUs, has gained
prominence in the high-performance computing arena. This corresponds to a trend of …

Partitioned point-to-point communication primitives provide a performance-oriented
mechanism to support a hybrid parallel programming model and have been included in the …

Modern high-speed interconnection networks are designed with capabilities to support
communication from multiple processor cores. The MPI endpoints extension has been …

The Message Passing Interface (MPI) has been one of the most prominent programming
paradigms in high-performance computing (HPC) for the past decade. Lately, with changes …

Extreme scale parallel computing systems will have tens of thousands of optionally
accelerator-equiped nodes with hundreds of cores each, as well as deep memory …

One-sided communication is crucial to enabling communication concurrency. As core counts
have increased, particularly with many-core architectures, one-sided (RMA) communication …

MPI+ threads is gaining prominence as an alternative to the traditional" MPI everywhere"
model in order to better handle the disproportionate increase in the number of cores …

Partitioned point-to-point communication and persistent collective communication were both
recently standardized in MPI-4.0. Each offers performance and scalability advantages over …