Vienna Scientific Cluster

VSC Training Course: Introduction to Hybrid Programming in HPC

Most HPC systems are clusters of shared memory nodes. To use such systems efficiently both memory consumption and communication time has to be optimized. Therefore, hybrid programming may combine the distributed memory parallelization on the node interconnect (e.g., with MPI) with the shared memory parallelization inside of each node (e.g., with OpenMP or MPI-3.0 shared memory). This course analyzes the strengths and weaknesses of several parallel programming models on clusters of SMP nodes. Multi-socket-multi-core systems in highly parallel environments are given special consideration. MPI-3.0 has introduced a new shared memory programming interface, which can be combined with inter-node MPI communication. It can be used for direct neighbor accesses similar to OpenMP or for direct halo copies, and enables new hybrid programming models. These models are compared with various hybrid MPI+OpenMP approaches and pure MPI. Numerous case studies and micro-benchmarks demonstrate the performance-related aspects of hybrid programming. 

Hands-on sessions are included on both days. Tools for hybrid programming such as thread/process placement support and performance analysis are presented in a "how-to" section. This course provides scientific training in Computational Science, and in addition, the scientific exchange of the participants among themselves.

This course is organized by the Vienna Scientific Cluster (VSC) in cooperation with the High-Performance Computing-Center Stuttgart (HLRS) and the Erlangen Regional Computing Center (RRZE).


Here is the preliminary course outline, öffnet eine externe URL in einem neuen Fenster.


Basic MPI and OpenMP knowledge as presented, e.g., in our VSC Training Courses on MPI and OpenMP.

For the hands-on sessions you should know Unix/Linux and either C/C++ or Fortran in particular.


Georg Hager (RRZE / HPC, Uni. Erlangen), Rolf Rabenseifner (HLRS, Uni. Stuttgart),
Claudia Blaas-Schenner and Irene Reichl (VSC Team, TU Wien)



Date, Time, and Location:

17.06.2020 8:45 - 18.06.2020 16:30,
FH Internet-Raum FH1 (TU Wien, Wiedner Hauptstraße 8-10, ground floor, red area)


Registration form, öffnet eine externe URL in einem neuen Fenster

Registration will start on April 15, 2020

Registration deadline is Tuesday, May 19, 2020, with priority rules. Acceptance will be approved on May 20, 2020. As long as seats are available there will be an extended registration period without priority rules.

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


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.

The course fee includes the coffee breaks (lunch is not included).   


Training events  of VSC:, öffnet eine externe URL in einem neuen Fenster

Training events of HLRS:, öffnet eine externe URL in einem neuen Fenster

Program Team

Dr. Claudia Blaas-Schenner

Lecturer (practicals) and Course Organizer


Dr. Georg Hager

+49-1-9131 85-28973


Dr. Rolf Rabenseifner

+49-1-711 685-65530


Dr. Irene Reichl

T +43-1-58801-420758


Elisabeth Pixner, BA

Program Assistant

T +43 1 58801 41714


Registration >>, öffnet eine externe URL in einem neuen Fenster