Third JUQUEEN Porting and Tuning Workshop

Start
2nd February 2015 08:00 AM
End
4th February 2015 16:00 PM
Location
Jülich Supecromputing Centre, Rotunda, building 16.4, room 301

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.

Prerequisites

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.

Registration

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.

Participants of the Third JUQUEEN Porting and Tuning Workshop

Agenda

All talks will be in the Rotunda (building 16.4, room 301). The hands-on sessions will take place in a Computer Lab (building 16.3, room 021). Talks marked with a * are for the special interest group from earth system modelling.

Agenda with floor plan as pdf: Agenda for the 3rd JUQUEEN Porting and Tuning Workshop (PDF, 372 kB)

Day 1, Monday, 2 February 2015

Time

Session

08:45-09:00

Registration

09:00-09:15

Norbert Attig, JSC
Welcome and introduction

09:15-09:45

Michael Stephan, JSC
BG/Q Hardware

09:45-10:30

Florian Janetzko, JSC
Best practices

10:30-11:00

Coffee break

11:00-12:00

Markus Geimer, JSC
Performance tools and debuggers

12:00-12:30

Paul Gibbon, JSC
Support structure at JSC

12:30-13:30

Lunch break

13:30-17:00

Hands-on session

15:00

Coffee break

16:00-17:00 *

Earth system modelling groups *
Presentation of the earth system modelling codes:

Klaus Görgen, JSC
Some JUQUEEN geoscience usage examples from SimLab TerrSys

Guowei He, IBG-3
Data assimilation with TerrSysMP

Hedieh Ebrahimi, Amphos21
Use of PFLOTRAN on JUQUEEN - A User's Perspective

Tobias Schruff, RWTH (IWW)
Fluid-Particle Multiphase Flow Simulations for the Study of Sand Infiltration into Immobile Gravel-Beds

17:00-17:30

Feedback and first experiences

17:35-17:53

Bus SB20 from Forschungszentrum "Seecasino" to Jülich "Neues Rathaus"

17:40-17:53

Bus SB220 from Forschungszentrum "Seecasino" to Jülich "Neues Rathaus"

18:30

Social event (dinner at a restaurant in Jülich)

Day 2, Tuesday, 3 February 2015

Time

Session

08:13-08:33

Bus SB20 from Jülich "Neues Rathaus" to Forschungszentrum Jülich "Seecasino"

09:00-12:30

Hands-on session

09:00-10:00

Sebastian Lührs, Kay Thust, JSC
Parallel I/O

10:00-10:30

Dirk Pleiter, JSC
Realising active storage concepts on BlueGene/Q

10:30-11:00

Coffee break

11:00-11:30

Thorsten Hater, JSC
Multithreading with OpenMP

11:30-12:00

Stefan Krieg, JSC
Advanced features fo BG/Q via intrinsics

12:30-13:30

Lunch break

13:30-17:00

Hands-on session

13:30-14:00

Alberto F. Martin, CIMNE
Scaling up Multilevel Domain Decomposition to the full JUQUEEN supercomputer

14:00-15:00*

Earth system modelling groups *
Presentation of the earth system modelling codes:

Catrin Meyer, JSC
Performance Analysis of the Climate Model ICON for the Project "High Definition Clouds and Precipitation for advancing Climate Prediction (HDCP2)"

Thomas Jahns, DKRZ
ICON from a non-scientist's perspective

Jonas Berndt, IEK-8
Short range ensemble meteorological forecasting for estimating available wind energy

Dominikus Heinzeller, KIT (IMK-IFU)
MPAS Extreme Scaling experiment

15:00

Coffee break and group photo

17:00-17:30

Feedback session

17:35-17:53

Bus SB20 from Forschungszentrum "Seecasino" to Jülich "Neues Rathaus"

17:40-17:53

Bus SB220 from Forschungszentrum "Seecasino" to Jülich "Neues Rathaus"

Day 3, Wednesday, 4 February 2015

Time

Session

08:13-08:33

Bus SB20 from Jülich "Neues Rathaus" to Forschungszentrum Jülich "Seecasino"

09:00-12:30

Hands-on session

10:45-11:00

Coffee break

12:30-13:30

Lunch break

13:30-17:00

Hands-on session

14:15-15:00

Feedback and discussion

15:00

Coffee break

Course material

Title

Note

Link

Publication Date

Participants of the Third JUQUEEN Porting and Tuning Workshop
No date
Agenda of the 3rd JUQUEEN Porting and Tunig Workshop 2015
No date
Fluid-Particle Multiphase Flow Simulations for the Study of Sand Infiltration into Immobile Gravel-Beds, by Tobias Schruff
No date
Simulation Laboratories at JSC, by Paul Gibbon
No date
Hybrid parallelism on BG/Q with OpenMP, by Thorsten Hater
No date
Debuggers and Performance Tools, by Markus Geimer
No date
MPAS Extreme Scaling Experiment - Towards convection-resolving, global climate simulations, by Dominikus Heinzeller
No date
JUQUEEN - Best Practices, by Florian Janetzko
No date
Some JUQUEEN geoscience usage examples from SimLab TerrSys, Klaus Görgen
No date
Use of PFLOTRAN o JUQUEEN - A User's Perspective, by Hedieh Ebrahimi
No date
ICON from a non-scientist's perspective, by Thomas Jahns
No date
Parallel I/O on JUQUEEN, by Sebastian Lührs
No date
Blue Gene/Q Hardware, by Michael Stephan
No date
Contact

For any questions concerning the workshop please send an e-mail to
d.broemmel@fz-juelich.de (Dr. Dirk Brömmel).

Jülich Supercomputing Centre (JSC)
Institute for Advanced Simulation (IAS)
Forschungszentrum Jülich GmbH
D-52425 Jülich, Germany

Access to Forschungszentrum Jülich
Access to JUQUEEN
Accomodation
Last Modified: 22.11.2022