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Third JUQUEEN Porting and Tuning Workshop

2-4 February 2015

Forschungszentrum Jülich
Jülich Supercomputing Centre

JUQUEEN is JSC's large special purpose supercomputer, an IBM Blue Gene/Q with 5.9 Petaflop/s. Although production on JUQUEEN started more than two years ago, users still need to make special efforts in order to get the most out of this unique research tool and get accustomed to the hard- and software.

Each year the workshop also focuses on one special user group with additional parallel talks and closer support (this does not exclude other users). The third workshop in this series invites users from earth system modelling. This will be supported by our Simulation Laboratories for Climate Science and Terrestrial Systems.

The aim of this hands-on workshop is to support current users of JUQUEEN in porting their software, in analysing its performance, and in improving its efficiency. The workshop topics start with an introduction to JUQUEEN's hard- and software and related best practices. It will also explain the available performance and debugging tools and explain parallel I/O with its data formats. Special topics may then provide more in-depth knowledge on specific BG/Q features such as prefetching, SIMDsation with QPX, low-level networking, and active storage as well as topics close to earth system modelling.

It is highly recommended that project PIs send at least one expert on their code to this workshop.

Participants of the Third JUQUEEN Porting and Tuning WorkshopParticipants of the Third JUQUEEN Porting and Tuning Workshop
Copyright: Forschungszentrum Jülich GmbH


Participants should belong to a currently active simulation project on JUQUEEN (project-ID!) and should already have an active user account (user-id!). Test runs during the workshop will be done on the participants' own project accounts.

In order to gain maximum benefit from this workshop, participants should have an in-depth (hands-on) knowledge of the algorithms and codes used in their project.

In addition, we also ask participants to prepare a test case to evaluate the initial performance of their code and to monitor the progress.


Registrations are only considered until 19 December 2014.

Note that in the application form we ask some information about your project and code in order to better plan the workshop program. This workshop is a PRACE Advanced Training Centres course (PATC). The application form is provided on the PRACE website.

Due to available space, the maximal number of participants is limited.
Participants will be notified early in January 2015.


For any questions concerning the workshop please send an e-mail to (Dr. Dirk Brömmel).

Jülich Supercomputing Centre (JSC)
Institute for Advanced Simulation (IAS)
Forschungszentrum Jülich GmbH
52425 Jülich