Thomas Bönisch

Thomas Bönisch
Universität Stuttgart · High Performance Computing Center Stuttgart

About

30
Publications
991
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106
Citations

Publications

Publications (30)
Chapter
Having the end of Moore’s law and the end of Dennard scaling in mind, this paper looks into current developments in the hardware market. Based on this, it shows the impact of this development on sustained application performance and gives some hints, where future hardware architectural improvements might help engineering applications for a better s...
Chapter
In this paper, we describe the challenges that high performance computing (HPC) is facing and will be facing over the coming years. We will look into the challenges that HPC faces with the coming end of Moore’s law. We will look into the opportunities we see in software and algorithms. Finally, we will discuss the convergence of HPC and data analyt...
Conference Paper
This paper targets the challenges of research data management with a focus on High Performance Computing (HPC) and simulation data. Main challenges are discussed: The Big Data qualities of HPC research data, technical data management, organizational and administrative challenges. Emerging from these challenges, requirements for a feasible HPC resea...
Article
The new HLRS flagship system Hazel Hen (a Cray XC40) is Europe's fastest system in the High Performance Conjugate Gradients (HPCG) benchmarking list. Designed to provide maximum sustainable performance to the users of HLRS - ignoring both peak and Linpack performance numbers - it has even climbed to number 8 in the TOP500 list and is one of the fas...
Conference Paper
Performance analysis and optimization of high-performance I/O systems is a daunting task. Mainly, this is due to the overwhelmingly complex interplay of the involved hardware and software layers. The Scalable I/O for Extreme Performance (SIOX) project provides a versatile environment for monitoring I/O activities and learning from this information....
Article
In high-performance computing applications, a high-level I/O call will trigger activities on a multitude of hardware components. These are massively parallel systems supported by huge storage systems and internal software layers. Their complex interplay currently makes it impossible to identify the causes for and the locations of I/O bottlenecks. E...
Article
This paper provides a comprehensive performance evaluation of the NEC SX-8 system at the High Performance Computing Center Stuttgart which has been in operation since July 2005. It provides a description of the installed hardware together with its performance for some synthetic benchmarks and five real world applications. All the applications achie...
Thesis
Wie in vielen Ingenieurwissenschaften sind auch in der Weltraumforschung Computersimulationen ein wichtiger Bestandteil der Forschung geworden. Auch bei der Entwicklung von Raumfahrzeugen spielt die Simulationsrechnung für die Systemauslegung eine wichtige Rolle. Gerade hier ist die Simulationsrechnung besonders wichtig, da Experimente und Messunge...
Book
With this second issue of "High Performance Computing on Vector Systems ~ Proceedings of the High Performance Computing Center Stuttgart" we con­ tinue our publication of most recent results in high performance computing and innovative architecture. Together with our book series on "High Perfor­ mance Computing in Science and Engineering'06 - Trans...
Chapter
The effectiveness of the parallelization of a 3D fluid flow simulation code using Software Engineering principles is considered. The problem on three-dimensional stationary ideal fluid flows through channels with complicated geometry has been investigated. The realization of the numerical algorithm has led to the sequential program, which has to be...
Chapter
The current results of the joint project of the Institute of Computational Technologies of the Siberian Branch of the Russian Academy of Sciences (ICT SB RAS, Novosibirsk, Russia) and the High Performance Computing Center Stuttgart (HLRS, Stuttgart, Germany) are presented. The project is realized within the framework of the activities of the German...
Book
Petaflop/s Computing.- Lessons Learned from 1-Year Experience with SX-9 and Toward the Next Generation Vector Computing.- BSC-CNS Research and Supercomputing Resources.- Challenges and Opportunities of Hybrid Computing Systems.- Going Forward with GPU Computing.- Optical Interconnection Technology for the Next Generation Supercomputers.- HPC Archit...
Conference Paper
This chapter discusses different parallel cluster file systems. The different file systems can be ranked into two classes roughly: the cluster file systems of the first class need to share a physical disk, at present, mainly based on fiber channel technology. In addition, participating nodes have a second network connection, where the control flow...
Conference Paper
This paper describes the effort taken to introduce a parallel multiblock structure into the URANUS simulation code for calculating reentry flows on structured c-meshes. The new data structure, the handling of block sides at physical and inner boundaries and the load balancing approach are presented. Target is the efficient calculation of reentry fl...
Article
Full-text available
The developed methodology is aimed at improving the efficiency of executing block-structured algorithms on parallel, distributed, heterogeneous computers. The basic approach of these algorithms is to divide the flow domain into many sub- domains called blocks, and solve the governing equations over these blocks. Dynamic load balancing problem is de...
Article
The development of the Navier-Stokes solver URANUS (Upwind Relaxation Algorithm for Nonequilibrium Flows of the University of Stuttgart) will be described. Advanced gas-phase and gas-surface interaction modelings allow an accurate prediction of thermochemical relaxations in high-temperature nonequilibrium flows around re-entry vehicles and the asso...
Article
Full-text available
The CRAY T3E-512 is currently the most powerful machine available at RUS/hww. Although it provides support for shared memory the natural programming model for the machine is message passing. Since RUS has decided to support primarily the MPI standard we have found it useful to test the performance of MPI on the machine for several standard message...
Article
The parallelization of the solver reduces the coupling between the blocks of the matrices computed at each processor. The boundaries of each subdomain are exchanged with the neighbors after each relaxation step to update the boundaries for the next step. The parallel program is portable and was tested on an Intel Paragon up to 72 nodes, an IBM RS/6...
Article
Full-text available
Since MPI [1] has become a standard for message-passing on distributed memory machines a number of implementations have evolved. Today there is an MPI implementation available for all relevant MPP systems, a number of which is based on MPICH [2]. In this paper we are going to present performance comparison for several implementations of MPI on diff...
Article
Full-text available
: This paper presents a status report on our efforts and experiences with a metacomputing project that aims at connecting a Cray T3E at Pittsburgh Supercomputing Center and a Cray T3E at the High Performance Computing Center in Stuttgart. We describe how the two machines are configured into a single virtual machine running code with standard MPI ca...
Conference Paper
The paper presented was inspired by an interesting investigation about the performance of MPI on an IBM RS/6000 SP machine [1]. The authors proposed a model for the eval-uation of message-passing overhead and suggested to have an evaluation of mes-sage-passing performance on as many hardware platforms as possible. In some further investigations suc...
Article
The CRAY T3E-512 is currently the most powerful machine available at RUS/hww. Although it provides support for shared memory the natural programming model for the machine is message passing. Since RUS has decided to support primarily the MPI standard we have found it useful to test the performance of MPI on the machine for several standard message...
Article
The flow simulation program URANUS has been developed to calculate non-equilibrium flows around space vehicles reentering the earth's atmosphere. The program simulates not only the supersonic flow but also the chemical reactions occuring as they have a non-negligible influence on the flow. As a result of the calculation the heat flow and the heat l...

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