As high-end computing systems continue to grow in scale, recent advances in multi-and
many-core architectures have pushed such growth toward more dense architectures, that is …

Proceedings of the 23rd European MPI Users' Group Meeting: Towards millions of
communicating threads Page 1 Towards millions of communicating threads Hoang-Vu …

The MPI-2 Standard has carefully specified the interaction between MPI and user-created
threads. The goal of this specification is to allow users to write multithreaded MPI programs …

MPI implementations that support the highest level of thread safety for user programs,
MPI_THREAD_MULTIPLE, are becoming widely available. Users often expect that different …

Concurrent multithreaded access to the Message Passing Interface (MPI) is gaining
importance to support emerging hybrid MPI applications. The interoperability between …

Advances in node-level architecture and interconnect technology needed to reach extreme
scale necessitate a reevaluation of long-standing models of computation, in particular bulk …

To make the most effective use of parallel machines that are being built out of increasingly
large multicore chips, researchers are exploring the use of programming models comprising …

As parallel systems are commonly being built out of increasingly large multicore chips,
application programmers are exploring the use of hybrid programming models combining …

The MPI-2 Standard has carefully specified the interaction between MPI and user-created
threads, with the goal of enabling users to write multithreaded programs while also enabling …

This paper presents an optimization of MPI communications, called CoMPI, based on run-
time compression of MPI messages exchanged by applications. A broad number of …