Research Events

27. April 2023, 09:00 until 28. April 2023 16:30

Online Course: Shared memory parallelization with OpenMP


The focus of this 2 days course is on shared memory parallelization with OpenMP for dual-core, multi-core, shared memory, and ccNUMA platforms.

This course teaches OpenMP starting from a beginners level. Hands-on sessions (in C and Fortran) will allow users to immediately test and understand the OpenMP directives, environment variables, and library routines. Race-condition debugging tools are also presented.

Content Levels: Beginners = 6:00h (50%) + Intermediate = 4:00h (33%) + Advanced = 2:00h (17%)

This course is a PRACE training event. It is organized by the VSC Research Center, TU Wien, in cooperation with the High-Performance Computing-Center Stuttgart (HLRS). This course has been originally developed by Rolf Rabenseifner (HLRS).

Agenda & Content:

1st day

08:45  Join online
09:00   Welcome
09:10   Introduction to modern hardware (talk)
10:10   An overview of OpenMP (talk)
10:35   Coffee
10:50   OpenMP programming and execution model (talk+practical)
12:30   Lunch
13:30   OpenMP worksharing directives (talk+practical)
15:00   Coffee
15:15   More OpenMP (talk+practical)
16:00   Summary (talk) + Q & A
16:30   End of first day

2nd day

08:45   Join online
09:00   How to write correct OpenMP programs (talk)
09:30   Intel Inspector XE (demo+practical)
10:30   Coffee
10:45   How to write efficient OpenMP programs (talk)
11:00   Heat equation (talk+practical)
12:30   Lunch
13:30   Heat equation (practical — continued)
14:00   Vectorization with OpenMP (talk)
14:25   Thread affinity in OpenMP (talk)
15:00   Coffee
15:15   The taskloop directive (talk+practical)
16:30   End of second day (course)

Course Format:

This course will be delivered as an HYBRID COURSE, i.e., you can choose either in-person attendance onsite at TU Wien or online participation via Zoom.

If you are planning to travel to Vienna for in-person attendance, we strongly recommend to choose travel options and hotels with the possibility to cancel (even close to the event) because we might be forced to deliver the course entirely online if Covid strikes back.


For the hands-on sessions you should be able to program in either C/C++ or Fortran and if you do the exercises on the VSC you should know how to work on the Unix/Linux command line.

Hands-on Labs:

Participants can choose between using their own laptops or any system they have access to that provides an OpenMP enabled compiler for their preferred programming language C/C++ or Fortran. Alternatively, participants can ask for a training user account at the VSC for the duration of the course.

Accepted participants will be contacted a few days before the course and asked to do a short PRE-ASSIGNMENT that has to be completed before the course starts.


Lukas Einkemmer, Philipp Gschwandtner, and Martina Prugger (University of Innsbruck),
Claudia Blaas-Schenner (VSC Research Center, TU Wien),
TBD (tutors; VSC Research Center, TU Wien)



Date, Time, and Location:

27.-28.04.2023, 09:00 - 16:30 CEST,
FH Schulungsraum (TU Wien, Wiedner Hauptstraße 8-10, ground floor, red area)
OR live online course via Zoom (hybrid course format)

Prices and Eligibility:

Registrations for this course are handled with priority rules (see below) and different course fees apply:

VSC users: none
Students and members of Austrian universities and public research institutes: none
Students and members of other universities and public research institutes: 120 €
Others: 400 €

Information about payment will be provided with the confirmation email.

Calendar entry

Event location

Wien, Hybrid und Zoom



VSC Research Center, TU Wien, in cooperation with the High-Performance Computing-Center Stuttgart (HLRS). This course has been originally developed by Rolf Rabenseifner (HLRS).
Claudia Blaas-Schenner


More Information





Entrance fee



Registration required


Please find registration link on the website of the Vienna Scientific Cluster (registration start on 30 January 2023):, opens an external URL in a new window

Registration deadline is Sunday, March 12, 2023, with priority rules. Acceptance will be approved on March 13, 2023. As long as seats are available there will be an extended registration period without priority rules.

Following your successful registration, you will receive further information approx. 1 week before the course.

For the hybrid course we can take a maximum of 30 persons. Additional registrations will be added to a waiting list.

Priority for acceptance: first - active users of the VSC systems, second - students and members of Austrian universities and public research institutes, third - other applicants.