OpenFOAM is a software package for solving partial differential equations and is very popular for computational fluid dynamics in the automotive segment. In this work, we describe our evaluation of the performance of OpenFOAM with MPI-3 Remote Memory ...

MPI-3 provide functions for non-blocking collectives. To help programmers introduce non-blocking collectives to existing MPI programs, we improve the PARCOACH tool for checking correctness of MPI call sequences. These enhancements focus on correct call ...

As we move towards efficient exascale systems, heterogeneous accelerators like NVIDIA GPUs are becoming a significant compute component of modern HPC clusters. It has become important to utilize every single cycle of every compute device available in ...

Advanced failure recovery strategies in HPC system benefit tremendously from in-place failure recovery, in which the MPI infrastructure can survive process crashes and resume communication services. In this paper we present the rationale behind the ...

A majority of parallel applications executed on HPC clusters use MPI for communication between processes. Most users treat MPI as a black box, executing their programs using the cluster's default settings. While the default settings perform adequately ...

There is a growing need to perform large computations on small systems, as access to large systems is not widely available and cannot keep up with the scaling of data. BDMPI was recently introduced as a way of achieving this for applications written in ...

Next-generation supercomputers are expected to have more components and, at the same time, consume several times less energy per operation. These trends are pushing supercomputer construction to the limits of miniaturization and energy-saving ...

Performance analysis tools are more than ever inevitable to develop applications that utilize the enormous computing resources of high performance computing (HPC) systems. In event-based performance analysis the amount of collected data is one of the ...

We propose a specification and discuss implementations of collective operations for parallel stencil-like computations that are not supported well by the current MPI 3.1 neighborhood collectives. In our isomorphic, sparse collectives all processes ...

We consider the problem of accurately measuring the time to complete an MPI collective operation, as the result strongly depends on how the time is measured. Our goal is to develop an experimental method that allows for reproducible measurements of MPI ...

Future extreme-scale high-performance computing systems will be required to work under frequent component failures. The MPI Forum's User Level Failure Mitigation proposal has introduced an operation, MPI_Comm_shrink, to synchronize the alive processes ...