Virtual Institute — High Productivity Supercomputing

39th VI-HPS Tuning Workshop (POP CoE) - Online


Monday 19th - Wednesday 21st April 2021


The workshop will be held online, using the Zoom videoconference platform.

Target group

This workshop is targeted to students, researchers and professionals who want to acquire the skills to analyze the performance of their own codes.
It is primarily aimed at women and underrepresented groups in the HPC community, and will be taught and supported by an all-female team.
Some basic knowledge of HPC environment, MPI and/or OpenMP is required to follow the course. The workshop will be held in English.


Register via the course website.
The number of participants is limited, early registration will open on 1st March only for female and underrepresented groups in the HPC community until Friday 9th April.
If there are free places remaining, from Friday 9th of April to Friday 16th of April registration will be open to the general public.

Organising Institutions



This workshop organised by VI-HPS, the POP CoE project and NAG WHPC chapter will:

  • give an overview of the POP CoE methodology
  • explain the functionality of POP and VI-HPS performance tools, and how to use them effectively
  • offer hands-on experience and expert assistance using the tools on your own application or provided examples and benchmarks

On completion participants will be familiar with the fundamentals of HPC performance analysis and will be able to use the POP performance analysis methodology and tools to better understand the performance of their code. Those who prepared their own application test cases will have been coached in the tuning of their measurement and analysis, and provided with optimization suggestions.


  • Zoom app (recommended)
  • SSH client (to connect HPC systems)
  • X Server (enabling remote visual tools)

Participants are encouraged to prepare their own MPI, OpenMP and hybrid MPI+OpenMP parallel application codes for analysis.

Performance analysis tools in this workshop

  • BSC tools for trace analysis and performance prediction
  • PAPI hardware performance counters
  • Score-P instrumentation and measurement
  • CUBE analysis report exploration and processing
  • Scalasca automated trace analysis
  • Vampir interactive trace analysis

A brief overview of the capabilities of these and associated tools is provided in the VI-HPS Tools Guide.

Programme Overview - all times given as CEST (UTC+2)

The workshop is organized in 3 days, with lectures and demos in the morning and hands-on sessions in the afternoon. It will run from 09:00 CEST to not later than 16:00 CEST each day, with breaks.

Day 1: Monday 19 April
10:00 Welcome
10:55 (break)
11:00 BSC performance tools
13:00 (lunch)
14:00 Hands-on coaching to apply BSC Tools to analyze participants' own code(s).
17:00 (adjourn)
Day 2: Tuesday 20 April
10:00 POP Methodology
10:55 (break)
11:00 Score-P instrumentation & measurement toolset
13:00 (lunch)
14:00 Score-P instrumentation & measurement toolset (continued)
15:00 Hands-on coaching to apply PAPI/Score-P/CUBE/Scalasca/Vampir to analyze participants' own code(s).
17:00 (adjourn)
Day 3: Wednesday 21 April
10:00 Show case of performance analysis with BSC tools
10:50 (break)
11:00 Show case of performance analysis with JSC tools
11:50 (break)
12:00 Hands-on coaching to apply the POP methodology..
13:00 (lunch)
14:00 Hands-on coaching to apply the POP methodology.
17:00 (adjourn)

Training team

The workshop will be taught and supported by an all-female team from POP CoE and VI-HPS:

  • Marta Garcia-Gasulla (Barcelona Supercomputing Center)
  • Judit Gimenez (Barcelona Supercomputing Center)
  • Sandra Mendez (Barcelona Supercomputing Center)
  • Fouzhan Hosseini (Numerical Algorithms Group)
  • Christina Mühlbach (TU Dresden)
  • Anara Kozhokanova (RWTH Aachen University)
  • Anke Visser (Jülich Supercomputing Center)
  • Radita Liem (RWTH Aachen University)

Hardware and Software Platforms

Marenostrum: The local HPC system Marenostrum is the primary platform for the workshop and will be used for the hands-on exercises. Course accounts will be provided during the workshop to participants without existing accounts. Other systems where up-to-date versions of the tools are installed can also be used when preferred, though support may be limited and participants are expected to already possess user accounts on non-local systems. Regardless of whichever external systems they intend to use, participants should be familiar with the relevant procedures for compiling and running their parallel applications (via batch queues where appropriate).


Tuning Workshop Series

Cédric Valensi
Université de Versailles Saint-Quentin-en-Yvelines
Email: cedric.valensi[at]


Radita Liem
RWTH Aachen University
Email: liem[at]