Invited Speakers

We are very proud to announce the following Invited Speakers:

  • Rajeev Thakur − Argonne National Laboratory, USA
    [ 13:30 - 14:30, Monday, 11 Dec @ Convention Hall, 2F ]
    "Exascale Computing Project: Software Technology Perspective"
    abstract
    Abstract Coming soon.
  • Tobias Grosser − ETH Zurich, Switzerland
    [ 14:30 - 15:00, Monday, 11 Dec @ Convention Hall, 2F ]
    "Advanced Loop Transformation for Scalable Automatic GPU Mapping"
    abstract
    Abstract Coming soon.
  • Tapasya Patki − Lawrence Livermore National Laboratory, USA
    [ 15:00 - 15:30, Monday, 11 Dec @ Convention Hall, 2F ]
    "PowerStack: Enabling Efficient Power Management through Hierarchical Design"
    abstract
    Abstract Coming soon.
  • Kimmo Kaski − Aalto University School of Science, Finland
    [ 15:50 - 16:20, Monday, 11 Dec @ Convention Hall, 2F ]
    "Social Physics: Data-Driven Discovery of Social Connectome"
    abstract
    Abstract While Information Communication Technology (ICT) has offered us new ways to communicate and socially interact, it leaves behind digital traces of our individual behaviour as records of ever-growing datasets. The study of such large-scale or Big Data using high-performance computational analysis and modeling with Network Theory approach can give us unprecedented insight into human sociality and to the structures and processes of social life and the society. This is well-demonstrated by our analysis of the dataset of mobile phone communication-logs, confirming the Granovetterian picture for the social network structure, i.e. being modular showing communities with strong internal ties and weaker external ties linking them. More recently the same dataset, but with additional data of the gender and age of the service subscribers, has allowed us to look at the nature of social interaction in more detail and from a different Dunbarian egocentric viewpoint. With this we have got a deeper insight into the gender and age-related social behaviour patterns and dynamics of close human relationships. Our analysis results demonstrate sex differences in the gender-bias of preferred relationships that reflect the way the reproductive investment strategies of both sexes change across their lifespan. We have also investigated the influence of seasonally and geographically related daily dynamics of daylight and ambient temperature on human resting patterns and observed two daily inactivity periods in the population-wide mobile phone calling patterns. The nocturnal resting period was found to be influenced by the length of daylight, and that its seasonal variation depends on the latitude of the phone users. In addition, the duration of the afternoon resting period was found influenced by the temperature, beyond certain threshold value, and that the yearly dynamics of the afternoon and nocturnal resting periods appear to be counterbalancing each other. These empirical findings inspired us to take the next step in network theory, namely developing models to catch some salient features of social networks and processes of human sociality. One of our first models, based on network sociology mechanisms for making friends, turned out to produce many empirically observed Granovetterian features of social networks, like meso-scale community and macro-scale topology formation. The modeling has subsequently been extended to take into account social networks being layered, multiplexing or context based, geography dependent, and having relationships between people changing in time. To summarize we believe that Social Physics’ large-scale data-driven analytics and modelling approaches to social systems opens up an unprecedented perspective to gain understanding of human sociality from individual to societal level, due to availability of Big Data and ever-increasing power of High Performance Computing, which together with methodological and algorithmic development would eventually lead to tools of social and societal design.
  • Seyong Lee − Oak Ridge National Laboratory, USA
    [ 16:20 - 16:50, Monday, 11 Dec @ Convention Hall, 2F ]
    "OpenARC: Extensible Compiler Framework for Directive-based, Efficient Heterogeneous Computing Study"
    abstract
    Abstract Directive-based, accelerator programming models such as OpenACC have arisen as an alternative solution to program emerging Scalable Heterogeneous Computing (SHC) platforms. However, the increased complexity in the SHC systems incurs several challenges in terms of portability and productivity. OpenARC is an open-sourced, very High-Level Intermediate Representation (HLIR)-based, extensible compiler, which serves as an extensible research framework to address these issues in the directive-based accelerator programming. OpenARC is the first OpenACC compiler supporting Altera FPGAs, in addition to NVIDIA GPUs, AMD GPUs, and Intel Xeon Phis. OpenARC’s high-level representations (HLIR) allows to generate human-readable output code (either CUDA or OpenCL), which can be viewed and modified further by programmers if necessary. OpenARC offers device-aware OpenACC extensions, with which users can express architecture-specific features at high-level to achieve performance portability across diverse architectures. Several on-going research, where various performance optimizations, traceability mechanisms, fault tolerance techniques, etc., are developed for better performance/debuggability/resilience, demonstrates the efficacy of OpenARC as a research framework for directive-based, high-level programming study on the complex accelerator computing.
  • Matthias S. Mueller − RWTH Aachen University, Germany
    [ 10:40 - 11:10, Tuesday, 12 Dec @ Convention Hall, 2F ]
    "Correctness Checking for Parallel Programming Paradigms – a progress report from the SPPEXA project MYX"
    abstract
    Abstract Coming soon.
  • Gerhard Wellein − FAU Erlangen-Nürnberg, Germany
    [ 11:10 - 11:40, Tuesday, 12 Dec @ Convention Hall, 2F ]
    "Performance Engineering for Scalable Sparse Eigensolvers in the DFG Project ESSEX: From basic building blocks to full scale applications"
    abstract
    Abstract Coming soon.
  • Achim Basermann − German Aerospace Center (DLR), Germany
    [ 11:40 - 12:10, Tuesday, 12 Dec @ Convention Hall, 2F ]
    "Algorithmic Developments and Software Engineering for Scalable Sparse Eigensolvers in the DFG Project ESSEX"
    abstract
    Abstract In the German Research Foundation (DFG) project ESSEX (Equipping Sparse Solvers for Exascale), we develop scalable sparse eigensolver libraries for large quantum physics problems. Partners in ESSEX are the Universities of Erlangen, Greifswald, Wuppertal, Tokyo and Tsukuba as well as DLR. The ESSEX Sparse Sover Repository (ESSR) follows a distributed software development strategy using the distributed version control system Git and supports application driven fault tolerance. ESSR includes the kernel library GHOST (General, Hybrid, and Optimized Sparse Toolit) and the flexible software framework PHIST for implementing iterative methods on HPC systems. PHIST (Pipelined Hybrid Iterative Solver Toolkit) has been developed containing an interface to the existing numerical software framework Trilinos originally. PHIST also includes adapters to basic building block libraries so that high-level algorithm developments can benefit from high-performance kernel implementations, e.g. sparse matrix-vector multiplication kernels. For solving huge sparse eigenproblems on extreme computing systems, we present our algorithmic approaches regarding Jacobi-Davidson methods with preconditioning, FEAST-like methods and Chebyshev filter diagonalization. The former method is applied to determine extreme eigenvalues and -vectors, while the latter two methods are well suited for solving interior eigenproblems. Moreover, we describe the software architecture of our solver toolkit PHIST.
  • Sebastian Reiter − Goethe-Universität Frankfurt am Main, Germany
    [ 14:30 - 15:00, Tuesday, 12 Dec @ Convention Hall, 2F ]
    "Highly scalable parallel multigrid simulations on adaptive unstructured grid hierarchies"
    abstract
    Abstract Coming soon.
  • Miriam Mehl − University of Stuttgart, Germany
    [ 15:00 - 15:30, Tuesday, 12 Dec @ Convention Hall, 2F ]
    "Multi-Physics Simulation meets Exa-Scale -- Challenges and Solutions"
    abstract
    Abstract Coming soon.
  • Matthias Bolten − University of Wuppertal, Germany
    [ 15:30 - 16:00, Tuesday, 12 Dec @ Convention Hall, 2F ]
    "Scalable multigrid methods with ExaStencils"
    abstract
    Abstract Coming soon.