From June 10 to 13, 2024, POP experts attended the ISC High Performance 2025 conference in sunny and beautiful Hamburg, Germany.
The International Supercomputing Conference is the world's leading event of its kind, attracting over 3,500 participants from across the globe. The conference programme is extensive, with a tutorial and workshop day held after the event, and a research and industry exhibition that features almost 200 booths.
The main conference days, from 10 to 12 June, saw POP experts present at the research exhibition booths of POP members BSC (#G32), IT4I (#J22) and JSC/HLRS (#K02). POP was also presented at the EuroHPC JU booth as a poster.
On the tutorial and workshop day (Jun 13), Marta Garcia-Gasulla and Sandra Mendez from BSC and Brian Wylie from JSC organized the “Determining Parallel Application Execution Efficiency and Scaling using the POP Methodology” tutorial. This tutorial presented the methodology developed and applied over several years within the POP CoE. Its focus is the hierarchy of execution efficiency and scaling metrics that identify the most critical issues and quantify potential benefits of remedies. The metrics can be readily compared and determined by a variety of tools for applications in any language employing standard MPI, OpenMP/OpenACC and other multi-threading and offload paradigms.
In addition, POP experts Christian Terboven (RWTH) and Xavier Teruel (BSC) contributed to the tutorials "Advanced OpenMP: Performance and 6.0 Features" and "Mastering Tasking with OpenMP 6.0".
POP expert Bernd Mohr from JSC presented "Parallel Performance Measurement and Analysis made Easy?!" at the 1st Workshop on the Pain of Parallel Programming (PPP 01). The workshop was organised because HPC systems have evolved. In the past years, they have advanced from simple single-core machines strung together with Ethernet into multi-core, multi-accelerator, multi-level monsters. Programming such systems undoubtedly entails dealing with synchronization and communication overhead, load imbalance and a multitude of programming models and languages. The workshop united application and programming framework and model experts to share their experiences of programming parallel systems. The aim was to identify solutions to alleviate pressing issues.
At the 7th Arm HPC Users Group (AHUG) workshop at ISC, Hugo Bolloré from the UVSQ POP team, presented "Exploring compiler behavior on an industrial application (OpenRadioss) on modern arm processors". This meeting s the annual gathering of end-users, developers, system operators, and technology providers involved in the growing Arm for HPC ecosystem.
Finally, POP organized the workshop “Readiness of HPC Extreme-scale Applications”. This ISC workshop has been organised to provide a forum to consider common challenges, ideas, solutions, and opportunities from the point of view of HPC applications developers preparing for exa-scale. After a welcome from the organizers Marta Garcia-Gasulla (BSC) and Brian Wylie (JSC), the workshop featured six presentations from other European CoEs and projects as well as an introdiction into the “EuroHPC concept for applications” by Linda Gesenhuis (EuroHPC JU/Lux).
The workshop closed with a panel discussion with European HPC applications CoEs moderated by Guy Lonsdale (scapos/D). More details about the program as well as the slides presented can be found on the workshop homepage.