Dec 19

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5th CCoE Seminar: Exploring the future of High Performance Computing with Proxy-Apps

Dr. Christian Trott from the Sandia National Laboratories will present on “Exploring the future of High Performance Computing with Proxy-Apps”. The Seminar will take place on Tuesday, Jan 8, at 3:00 p.m. The location will be the Willersbau Room C207 at the Technische Universität Dresden.

With the number of compute cores per node increasing ever more, the current model of a single (MPI) level parallelism, used by most simulation codes, is not working any longer.
Even for classical architectures the interconnect of clusters reaches its limit in terms of how many connections can be sustained out of every node. With GPU like architectures it is even inconceivable to use a single level of parallelism to run simulations on peta-scale machines. While the need to add a threading model below the usual MPI layer is apparent, it is not yet clear what the programming model for the next decade will be, in particular if the same code base shall run on different hardware architectures. To tackle this problem, the Mantevo project (www.mantevo.org) was developed. It provides proxy applications which allow for a rapid evaluation of new approaches and enable informed decisions on how to adapt large scientific codes to the changing hardware. In this talk results from implementing MiniMD (the proxy-app representing the molecular dynamics code LAMMPS) with three different
programming models will be discussed. It focuses on a comparative study of the performance achieved on GPUs (NVIDIA K20), Intel ManyCore cards (Xeon Phi Knights Corner) and classical CPUs (Intel Sandy Bridge and IBM Blue Gene Q), and the steps necessary to reach it.

Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.

Permanent link to this article: https://gcoe-dresden.de/5th-ccoe-seminar-exploring-the-future-of-high-performance-computing-with-proxy-apps/