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LUMI Performance Analysis and Optimization Workshop, Tallinn, 22-24 October 2025

Course organisation

  • Location: Room #SOC-423, Akadeemia tee 3, 12611 Tallinn, Estonia (TalTech School of Business and Governance)

    The TalTech Campus is easy to reach with public transportation from the city centre.

  • Schedule

  • HedgeDoc for questions

    This document is for questions during the course by course participants only. It will not be checked before the course. If you have issues joining the project, please contact the LUMI helpdesk instead.

  • Course project: project_465002175. This project should only be used during the course and be used for the course exercise sessions only.

  • Reservations:

    • Day 1: Workshop_Day1 (on the standard Slurm partition)

    • Day 2: Workshop_Day2 for CPU (on the standard Slurm partition) and Workshop_Day2_gpu for GPU (on the standard-g Slurm partition)

    • Day 3: Workshop_Day3 (on the standard-g Slurm partition)

  • Some suggestions for the night

Course materials

Materials will follow as the course progresses

Due to copyright issues some of the materials are only available to current LUMI users and have to be downloaded from LUMI.

Note: Some links in the table below are dead and will remain so until after the end of the course.

Presentation slides recording
Day 1
Introduction / recording
Architecture, Programming and Runtime Environment slides recording
Exercises #1 / /
Compilers, libraries, runtime, single-core optimisations slides recording
Performance Analysis with Perftools slides recording
Exercises #2 / /
Advanced Performance Analysis slides recording
Exercises #3 / /
Interactive demo: Strategies for code optimization slides /
Day 2
MPI Optimizations slides recording
Exercises #5 / /
I/O Optimizations slides recording
Exercises #6 / /
AMD Profiling Tools and GPU optimisations 1 slides recording
Exercises #7 / /
AMD Profiling Tools and GPU optimisations 2 slides recording
Exercises #8 / /
Day 3
Best practices: GPU Optimization, tips & tricks slides recording
Exercises #9 / /
Extras
Appendix: Links to documentation / /

Making the exercises after the course

HPE

The exercise material remains available in the course archive on LUMI:

  • The PDF notes in /appl/local/training/paow-20251022/files/LUMI-paow-20251022-Exercises_HPE.pdf

  • The other files for the exercises in either a bzip2-compressed tar file /appl/local/training/paow-20251022/files/LUMI-paow-20251022-Exercises_HPE.tar.bz2 or an uncompressed tar file /appl/local/training/paow-20251022/files/LUMI-paow-20251022-Exercises_HPE.tar.

To reconstruct the exercise material in your own home, project or scratch directory, all you need to do is run:

tar -xf /appl/local/training/paow-20251022/files/LUMI-paow-20251022-Exercises_HPE.tar.bz2

in the directory where you want to work on the exercises. This will create the Exercises/HPE subdirectory from the training project.

However, instead of running the lumi_c.sh or lumi_g.sh scripts that only work for the course as they set the course project as the active project for Slurm and also set a reservation, use the lumi_c_after.sh and lumi_g_after.sh scripts instead, but first edit them to use one of your projects.

AMD

See the notes at each session.

There is no guarantee though that the software that is referred to on the system, will be there forever or will still work after an update of the system.

Warning

The software and exercises were tested thoroughly at the time of the course. LUMI however is in continuous evolution and changes to the system may break exercises and software