Innovatives Supercomputing in Deutschland
inSiDE • Vol. 11 No. 2 • Autumn 2013
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HLRS Scientific Tutorials and Workshop Report and Outlook

HLRS has installed Hermit, a Cray XE6 system with AMD Interlagos processors and 1 PFlop/s peak performance and extended with an XC30 system. We strongly encourage you to port your applications to these architectures as early as possible. To support such effort we invite current and future users to participate in the special Cray XE6/XC30 Optimization Workshops. With these courses, we will give all necessary information to move applications to this Petaflop system. The Cray XE6 provides our users with a new level of performance. To harvest this potential will require all our efforts. We are looking forward to working with our users on these opportunities. This four-day course in cooperation with Cray and multi-core optimization specialists is in spring 2014.

Programming of Cray XK7 clusters with GPUs is taught in OpenACC Programming for Parallel Accelerated Supercomputers – an alternative to CUDA from Cray perspective on April 10 - 11, 2014.

These Cray XE6/XC30 and XK7 courses are also presented to the European community in the framework of the PRACE Advanced Training Centre (PATC). GCS, i.e., HLRS, LRZ and the Jülich Supercomputer Centre together, serve as one of the first six PATCs in Europe.

One of the flagships of our courses is the week on Iterative Solvers and Parallelization. Prof. A. Meister teaches basics and details on Krylov Subspace Methods. Lecturers from HLRS give lessons on distributed memory parallelization with the Message Passing Interface (MPI) and shared memory multi-threading with OpenMP. This course will be presented twice, in March 2014 at HLRS in Stuttgart and September 2014 at LRZ.

Another highlight is the Introduction to Computational Fluid Dynamics. This course was initiated at HLRS by Dr.-Ing. Sabine Roller. She is now a professor at the University of Siegen. It is again scheduled in spring 2014 in Stuttgart and in September/October in Siegen. The emphasis is placed on explicit finite volume methods for the compressible Euler equations. Moreover outlooks on implicit methods, the extension to the Navier-Stokes equations and turbulence modeling are given. Additional topics are classical numerical methods for the solution of the incompressible Navier-Stokes equations, aeroacoustics and high order numerical methods for the solution of systems of partial differential equations.

Our general course on parallelization, the Parallel Programming Workshop, October 6 - 10, 2014 at HLRS, will have three parts: The first two days of this course are dedicated to parallelization with the Message passing interface (MPI). Shared memory multi-threading is taught on the third day, and in the last two days, advanced topics are discussed. This includes MPI-2 functionality, e.g., parallel file I/O and hybrid MPI+OpenMP, as well as the upcoming MPI-3.0. As in all courses, hands-on sessions (in C and Fortran) will allow users to immediately test and understand the parallelization methods. The course language is English.

Several three and four day-courses on MPI & OpenMP will be presented at different locations all over the year.

We also continue our series of Fortran for Scientific Computing in December 2013 and in March 2014, mainly visited by PhD students from Stuttgart and other universities to learn not only the basics of programming, but also to get an insight on the principles of developing high-performance applications with Fortran.

With Unified Parallel C (UPC) and Co-Array Fortran (CAF) in April 2014, the participants will get an introduction of partitioned global address space (PGAS) languages.

In cooperation with Dr. Georg Hager from the RRZE in Erlangen and Dr. Gabriele Jost from Supersmith, the HLRS also continues with contributions on hybrid MPI & OpenMP programming with tutorials at conferences; see the box on the left page, which includes also a second tutorial with Georg Hager from RRZE.

In the table below, you can find the whole HLRS series of training courses in 2014. They are organized at HLRS and also at several other HPC institutions: LRZ Garching, NIC/ZAM (FZ Jülich), ZIH (TU Dresden), TUHH (Hamburg Harburg), and ZIMT (Siegen).

• Rolf Rabenseifner
University of Stuttgart, HLRS

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