MNHACK25: 7th MareNostrum Hackathon

MNHack is an opportunity for HPC application developers and users to deploy, test, port, and optimize their codes on cutting-edge platforms provided by the Barcelona Supercomputing Center (BSC). Unlike traditional competitive hackathons, MNHack is a non-competitive, hands-on event designed to help users improve their applications with the support of world-class mentors. This edition introduces two specialized non-simultaneous tracks, allowing participants to choose the environment that best suits their goals (or both):

Track 1: MN5. from 13 to 15 October, 2025

Participants will gain access to Europe’s newest pre-exascale supercomputer, Marenostrum 5, including both general-purpose and accelerated computing resources. This track is ideal for those looking to:

• Deploy and scale up HPC applications
• Optimize performance on cutting-edge CPU/GPU hardware
• Analyze behavior using BSC tools such as Extrae, Paraver, and Dimemas
• Leverage programming models like MPI, OpenMP, CUDA, OpenACC, and HIP

Track 2: RISC-V, from 16 to 17 October, 2025

This track is dedicated to exploring and optimizing HPC applications on RISC-V-based platforms, offering a hands-on experience with an open hardware architecture that is gaining traction in the HPC space. Participants can:

• Port and test their applications on RISC-V hardware
• Explore low-level performance tuning opportunities
• Experiment with custom toolchains and runtime systems
• Collaborate on open-source ecosystem development

Participants in both tracks will receive help based on their needs, including programming models, tools, hardware platforms, and dev-ops. Experts from BSC will be available to provide guidance throughout the hackathon. You can participate individually or in a team of up to 4 people. You just need an HPC application and to be ready to have a whale of a time.

• Considering the latest upgrades in MareNostrum5 capacity, that will incorporate strong and innovative AI capacities, we have concluded that a hackathon on MareNostrum5 will be of special interest for industry, in particular SMEs, that have a dedicated access mechanism to the system since april 9th 2025.

Important Information

• Registration deadline: 23 September 2025
• Notification of acceptance: The week after your submission. Upon acceptance, participants have to confirm their attendance within the next 10 days, if not, the application will be dismissed. Note that spots are limited and we will not be able to accept more teams when capacity limit is reached, applications will be accepted based on robustness of the proposal and in order of submission.
• Date and place:
  • MN5 Track:
    • 13/Oct/2025 Time: 09:00 - 15/Oct/2025 Time: 18:00
    • BSC-Repsol building, Auditorium (S1-2-1 room).
    • Up to 54 people.
  • RISC-V Track:
    • 16/Oct/2025 Time: 09:00 - 17/Oct/2025 Time: 18:00
    • Capella building, Severo Ochoa room.
    • Up to 24 people.
• Teams: Up to four people.
• Experts: Provided by BSC and third-party institutions.
• Cost: Free of charge.
• Contact: mnhack[at]bsc.es.

Technical talks