This workshop is dedicated to the development, optimisation, and execution of highly scalable codes on one of Europe’s most powerful supercomputers, MareNostrum 5. It is designed for research teams and advanced users who aim to push their applications to extreme scale and fully exploit modern high-performance computing (HPC) architectures.

Registration

Registration is free but mandatory. Please register here by March 15, 2026.

Workshop focus

The program will combine technical presentations with hands-on sessions, covering:

• – Strategies for large-scale parallelisation
• – Advanced debugging techniques at scale
• – Performance tuning and optimisation
• – In-depth performance analysis across a large number of nodes
• – Best practices for efficient use of cutting-edge HPC systems

Participants will have the opportunity to work with a substantial fraction of MareNostrum 5 during the workshop. If their applications demonstrate strong scalability and robustness, the final day will offer the possibility to execute runs on the full machine, providing a unique opportunity to validate extreme-scale performance.

Access to accelerated resources

The workshop will also provide access to the accelerated partition, enabling participants to run and benchmark GPU-enabled applications. This makes the event particularly suitable for:

• – AI and machine learning workloads;
• – Large-scale simulations with GPU acceleration;
• – Training and benchmarking large language models (LLMs) and other data-intensive applications.

Participant profile

Applicants are expected to:

• – Be owners or expert users of a highly scalable code
• – Possess sufficient technical expertise to independently run, analyse, and interpret large-scale executions
• – Be prepared to actively optimise and adapt their applications during the workshop

The event is intended for teams capable of directly benefiting from extreme-scale runs and translating the results into scientific or technological impact.

Selection criteria

Due to the limited number of teams, if the number of applications exceeds the available slots, a selection process will be carried out according to the criteria described below.

• – The potential performance gains and scalability improvements achievable during the workshop
• – The expected scientific, technological, or industrial impact
• – The team’s current and projected contribution to the European HPC landscape

Particular consideration will be given to teams with active involvement in the EuroHPC ecosystem, including connections with Centers of Excellence (CoEs), AI Factories, or related European initiatives.