Andreas Jocksch

Strong Scaling of OpenACC enabled Nek5000 on several GPU based HPC systems

We present new results on the strong parallel scaling for the OpenACC-accelerated implementation of the high-order spectral element fluid dynamics solver Nek5000. The test case considered consists...

Optimised allgatherv, reduce_scatter and allreduce communication in message-passing systems

Collective communications, namely the patterns allgatherv, reduce_scatter, and allreduce in message-passing systems are optimised based on measurements at the installation time of the library. The...

Strong Scaling of OpenACC enabled Nek5000 on several GPU based HPC systems

Enabling Continuous Testing of HPC Systems Using ReFrame

Accelerating an MPI Lattice Boltzmann code using OpenACC

A Bucket Sort Algorithm for the Particle-In-Cell Method on Manycore Architectures

FFTs and Multiple Collective Communication on Multiprocessor-Node Architectures

A Diffusion Process for Graph Partitioning: Its Solutions and Their Improvement

Flexible Algorithms for Persistent MPI Allreduce Communication

Prediction of the Inter-Node Communication Costs of a New Gyrokinetic Code with Toroidal Domain

Integrating a Python Dynamical core into ICON

The transition of Earth-system models to exascale is often hindered by rigid, monolithic Fortran codebases and maintenance-heavy compiler directives. While high-level DSLs offer a solution, they...