SCHEDULE: NOV 12-18, 2011

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Hybrid Parallelization of a Realistic Heart Model

SESSION: Research Poster Reception

EVENT TYPE: ACM Student Research Competition Poster, Poster, Electronic Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR: Bernd Mohr

AUTHOR(S):Dorian Krause, Mark Potse, Thomas Dickopf, Rolf Krause, Angelo Auricchio, Frits Prinzen

ROOM:WSCC North Galleria 2nd/3rd Floors

ABSTRACT:
The simulation of the electrophysiology of the heart is a challenging task due to the multiscale nature requiring the use of high spatial and temporal resolutions. Hence it is important to optimize simulation codes for fast execution on contemporary massively-parallel architectures. We have parallelized the well-established realistic heart model PROPAG using a hybrid OpenMP-MPI approach capable of running large-scale simulations with billions of degrees of freedom, which is among the largest problem sizes reported in the literature for this field. We present an in-depth performance analysis of the scalability of our code on up to 8k cores. We demonstrate a performance improvement of 24 - 62% for the multithreaded code and analyze the advantages of the hybrid execution model for this application type.

Chair/Author Details:

Bernd Mohr (Chair) - Juelich Supercomputing Centre

Dorian Krause - Institute of Computational Science, University of Lugano

Mark Potse - Cardiovascular Research Institute, University of Maastricht

Thomas Dickopf - Institute of Computational Science, University of Lugano

Rolf Krause - Institute of Computational Science, University of Lugano

Angelo Auricchio - rdiocentro Ticinoangelo.auricchio@cardiocentro.org

Frits Prinzen - Department of Physiology, University of Maastricht

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