Panel 21 July, 2015 Panel Exascale computing systems in e-Infrastructures at HPCS 2015 – The International Conference on High Performance Computing & Simulation 21 July, Marian Bubak AGH University of Science and Technology Krakow, Poland and University of Amsterdam, Amsterdam, The Netherlands

Panel members Jack Dongarra Jack Dongarra, University of Tennessee, USA Yannick Legre, Yannick Legre, EGI GI, Amsterdam, The Netherlands Marc Hamilton Marc Hamilton, NVIDIA, California, USA Walter Lioen Walter Lioen, Amsterdam Supercomputing Center SURFSara

Exascale – a disruptive transition? Single processor Vector Parallel Sub- and petascale Exascale Exascale Exascale and Big Science

Challenges of Exascale Computing Applications – Models – Methods – Algorithms Software – Programming paradigms and languages – Performance, power management – Tools Systems – Many-core, hybrid nodes – Memory – Interconnect, I/O systems

1.Applications which require exascale computing : examples and common requirements 2.Hardware for exascale computing: memory systems, intra-node communication, power management 3.Scalable algorithms: communication, avoidance of data movement, parallel in time 4.Programming models: holistic approach, data centric approach, issue of heterogeneity; software engineering methods 5.Tools for management of exascale applications and resources Goal: to identify hot research topics Topics for discussion

Plan of the Panel Introduction, objectives: 3 min, MB Self-introduction of panelists: 4 x 2 min Discussion: 16 min each: 4 x 3 min + 4 min Q/A Summary (5 min, MB)