OpenACC Programming for Parallel Accelerated Supercomputers

Enterprises & SME Research & Science
OpenACC Programming for Parallel Accelerated Supercomputers


This workshop will cover the programming environment of the Cray XK7 hybrid supercomputer, which combines multicore CPUs with GPU accelerators ( Attendees will learn about the directive-based OpenACC programming model (, whose multi-vendor support allows users to portably develop applications for parallel accelerated supercomputers.
The workshop will also demonstrate how to use the Cray Programming Environment tools to identify CPU application bottlenecks, facilitate the OpenACC porting, provide accelerated performance feedback and to tune the ported applications. The Cray scientific libraries for accelerators will be presented, and interoperability of OpenACC directives with these and with CUDA will be demonstrated. Through application case studies and tutorials, users will gain direct experience of using OpenACC directives in realistic applications. An outlook to OpenMP-4.0 accelerator support will be added.
Users may also bring their own codes to discuss with Cray specialists or begin porting.
This course provides scientific training in Computational Science, and in addition, the scientific exchange of the participants among themselves.

General Information


Thursday: 9:00-9:30 local registration, 9:30 - 18:00 course
Friday: 9:00 - 16:30 course

see link to detailed program (preliminary, agenda from previous course)




Stefan Andersson and Aniello Esposito


Academic participants (i.e., members of universities or public research institutions) from Europe or PRACE countries: Please apply through the PATC web page. After your registration, you will receive an automated "congratulation"-email about your successful registration. This email implies that you have a guaranteed seat in the course and you should organize your travel.
All other participants (not from academia, or from outside Europe), please apply through this online registration form.
Course number is 2014-XK.


for registration is Apr. 6, 2014 (extended deadline).


Members of German universities and public research institutes: none.
Members of universities and public research institutes within Europe or PRACE: none.  
Members of other universities and public research institutes: 120 EUR.  
Others: 400 EUR.
(includes food and drink at coffee breaks, will be collected on the first day of the course, cash only)


Programming experience in C or Fortran, some knowledge about parallel programming


HLRS is part of the Gauss Centre for Supercomputing (GCS), which is one of the six PRACE Advanced Training Centres (PATCs) that started in Feb. 2012. The mandate for the PATCs is as follows: "The PRACE Advanced Training Centres will serve as European hubs of advanced, world-class training for researchers working in the computational sciences." (see D3.2.3)
This course is a PATC course, see also the PRACE Training Portal and Events. For participants from public research institutions in PRACE countries, the course fee is sponsored through the PRACE PATC program.

HLRS is also member of the Baden-Württemberg initiative bwHPC-C5.
This course is also provided within the framework of the bwHPC-C5 user Support.


Additional information can be found, e.g., at Cray XE6 (Hermit) at HLRS

Local Organizer

Rolf Rabenseifner phone 0711 685 65530,
Joerg Hertzer phone 0711 685 65932,

Cancelation Policy

If you cannot come to the course, please send an email to the organizer as soon as possible. This would allow us to accept additional participants from the waiting-list. There is no cancelation fee.
NO-SHOW: Registered persons that do not cancel and do not show up without any reasons are blocked for the next year on any of our workshops (because it is too expensive to produce unused copies of the slides for them).


Each participant will get a paper copy of all slides.

Further courses

Shortcut-URL of this course:
and PATC web page


Rolf Rabenseifner
phone 0711 685 65530

Joerg Hertzer
phone 0711 685 65932