Performance Enhancements to PlascomCM

Presenter(s): Lucas A. Wilson (TACC)

Principal Investigator(s): Daniel Bodony (UIUC)

Presentation Slides

PlascomCM is a Fortran90 application that is used to investigate the behavior of compressible, viscous gases, usually in the contexts of aerospace or mechanical engineering and with a focus on turbulence and generated sound. Several recent examples include predicting and controlling the noise produced by high-speed turbulent jets, such as found on commercial and military aircraft, and Mach 2.25 turbulent boundary layer grazing a flexible panel with application to multi-physics design of future hypersonic vehicles. The discretization of the governing non-linear partial differential equations uses an overset mesh and multiblock approach with locally structured meshes for which spatial derivatives are approximated with fixed-width stencil-based computations based on finite-difference-like considerations. This talk will highlight ECSS work done over the last 3 years to improve the performance of PlascomCM, with the end goal of efficiently using the Intel Xeon Phi coprocessors on Stampede. Code modifications which have improved caching and enabled vectorization will be highlighted. Further modifications which are currently being considered to improve performance on Xeon Phi will also be discussed.

Apache Airavata and XSEDE Science Gateways

Presenter(s): Suresh Marru (IU)

Principal Investigator(s): Mark Shephard (Rensselaer Polytechnic Institute) Cameron Smith (Rensselaer Polytechnic Institute)

Presentation Slides

The Symposium talk will walk through projects initially started as optimization and code porting ECSS efforts which later were extended to include gateway support. The resulting codes are made available to community at large through these gateway interfaces. Examples will include PI: Prof. Arne Pearlstein's flow-induced vibration simulation gateway and PI's Mark Shephard and Cameron Smith's PHASTA Gateway. The talk will also discuss the use of a multi-tenanted science gateway framework based on Apache Airavata as a starting point and to achieve short term operational sustainability through externally funded NSF projects. Lastly, we will discuss the reuse of ECSS contributed extensions across projects.