HLRN Cray User Workshop Announcement

"Cray XC30 User Workshop"

Date and Place

16-19 September 2013 in Berlin at ZIB


A workshop on Using the Cray XC30 System is organized by HLRN and Cray Inc. in preparation for the HLRN-III system from Cray Inc. The XC30 in Berlin will go into operation shortly before the workshop. Focus will be on programming environment, development, and performance analysis as well as porting existing codes for the Cray XC30 architecture. The workshop includes a mixture of lectures and practical sessions on the HLRN-III system. Example exercises will be provided but attendees are encouraged to bring along their own applications to the workshop. Workshop participants should also bring their own laptop for the hands-on sessions on the XC30.

Who Should Attend

The workshop mainly aims at the HLRN consultants. Also invited are interested experienced HLRN users, that themselves develop, optimize, and port big codes, and that are able to transfer their newly gained knowledge to their own working groups.

Details and Travel Information

Date and Time:
Monday, September 16, 2013 12:00 until Thursday, September 19, 2013, 12:00.

Berlin, Konrad-Zuse-Zentrum für Informationstechnik Berlin (ZIB), seminar room (main entrance)

How to reach:
Information on the location and further travel information can be found on the ZIB visitor service page


Please send email to , give your contact details, and note, which application you will bring and use to analyze and optimize during the hands-on sessions.

ALERT! Attention: The number of participants is limited. Your registration will be confirmed by email. Please remember to cancel your registration (by email to in case of change of your plans.

Workshop Agenda

The workshop covers the following topics.

  • Overview of the Cray XC architecture
  • Programming environment for the Cray XC system
  • Cray Linux Environment
  • Introduction to tools on the Cray XC system
  • Profiling, performance analysis and visualization
  • Cray scientific and math libraries
  • I/O optmization
  • PGAS overview
  • Application debugging with Allinea DDT

A significant part of the workshop time is devoted to hands-on work (examples, participants' own codes). Please bring your own laptop.

Detailed Workshop Agenda

Monday Tuesday Wednesday Thursday
Allinea DDT Performance analysis: single-core/socket/node Cray Scientific Libraries: IRT
Hands-on: analysing applications Hands-on: tuning applications
Single-core/socket/node optimization techniques I Overview: PGAS and MPI 3.0
Introduction to UPC
Coffee break
Single-core/socket/node optimization techniques II Coffee break
Coffee break Introduction to CAF
Introduction to performance analysis Hands-on: tuning applications
Hands-on: PGAS
More about CrayPat
12:00-12:15 Coffee and Registration Q&A, round-table on experiences
12:15-12:30 Lunch break Lunch break
12:30-12:45 Welcome,Overview, Introductions End of workshop
13:00-13:15 XC architecture overview
13:15-13:30 Hands-on: analysing applications Live demo: Reveal
13:45-14:00 Programming environment Hands-on: tuning applications
14:15-14:30 Cray Scientific Libraries part I Load imbalance & rank placement I/O optimization techniques
14:45-15:00 Coffee break Hands-on: tuning applications
15:00-15:15 Compiling and running applications
15:15-15:30 Coffee break
15:30-15:45 Hands-on: tuning applications
15:45-16:00 Hands-on: Porting applications Coffee break
16:00-16:15 MPI environment variables
16:30-16:45 Hands-on: tuning applications Q&A, round-table on experiences
16:45-17:00 Q&A, round-table on first experiences
17:00-17:15 Q&A, round-table on experiences




Lecturers: Stefan Andersson, Cray Inc; Aniello Esposito, Cray Inc; Patrick Wohlschlegel, Allinea.

Language: English

Workshop Material and Presentations

The workshop material (presentation slides) is available for download in the password-protected area on the HLRN web server.

Contact and Questions

For more information please send email to .

( workshop internals )

Created by WolfgangBaumann
Last modification: WolfgangBaumann - 24 Jan 2017 12:14 / 3 years, 6 months, 3 weeks ago. (Version: 12)

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