Abstract
This paper presents runtime optimisation approaches for a real-time evacuation assistant. The pedestrian model used for the forecast is a modification of the centrifugal force model which operates in continuous space. It is combined with an event driven route choice algorithm which encompasses the local shortest path, the global shortest path and a combination with the quickest path. A naive implementation of this model has the complexity of O(N 2), N being the number of pedestrians. In the first step of the optimisation the complexity is reduced to O(N) using special neighbourhood lists like Verlet-List or Linked-Cell commonly used in molecular dynamics. The next step in this optimisation process is parallelisation on a multicore system. The Message Passing Interface (MPI) and Open Multi-Processing (OpenMP) application programming interfaces are used to this extend. The simulation is performed on the Juropa cluster installed at the Jülich Supercomputing Centre. The speedup factors obtained are ~10 for the linked-cells, ~4 for 8 threads and ~3 for the parallelisation on 5 nodes using a static domain decomposition.
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References
Juropa-JSC - HPC-FF (August 2009), http://www.fz-juelich.de/portal/EN/Research/InformationTechnology/Supercomputer/JUROPA.html
Allen, M.P., Tildesley, D.J.: Computer simulation of liquids, vol. 18. Oxford University Press (1989)
Baiardi, F., Bonotti, A., Ferrucci, L., Ricci, L., Mori, P.: Load balancing by domain decomposition: the bounded neighbour approach. In: Proc. of 17th European Simulation Multiconference, pp. 9–11 (2003)
Blue, V.J., Adler, J.L.: Cellular automata microsimulation for modeling bidirectional pedestrian walkways. Transportation Research Part B 35, 293–312 (2001)
Chraibi, M., Seyfried, A., Schadschneider, A.: Generalized centrifugal force model for pedestrian dynamics. Physical Review E 82, 046111 (2010)
Galea, E.R., Gwynne, S., Lawrence, P., Filippidis, L., Blackspields, D., Cooney, D.: buildingEXODUS V 4.0 - User Guide and Technical Manual (2004)
Geimer, M., Wolf, F., Wylie, B.J.N., Ábrahám, E., Becker, D., Mohr, B.: The scalasca performance toolset architecture. Concurrency and Computation: Practice and Experience 22(6), 702–719 (2010)
Griebel, M., Knapek, S., Zumbusch, G.: Numerical Simulation in Molecular Dynamics: Numerics, Algorithms, Parallelization, Applications, 1st edn. Springer Publishing Company, Incorporated (2007)
Hanxleden, R.V., Clark, T.W., Clark, T.W., Hanxleden, R., Mccammon, J.A., Scott, L.R.: Parallelizing molecular dynamics using spatial decomposition. In: Scalable High Performance Computing Conference, pp. 95–102. IEEE Computer Society Press (1993)
Hegarty, D., Kechadi, M., Dawson, K.: Dynamic Domain Decomposition and Load Balancing for Parallel Simulations of Long-Chained Molecules. In: Waśniewski, J., Madsen, K., Dongarra, J. (eds.) PARA 1995. LNCS, vol. 1041, pp. 303–312. Springer, Heidelberg (1996)
Helbing, D., Molnár, P.: Social force model for pedestrian dynamics. Phys. Rev. E 51, 4282–4286 (1995)
Holl, S., Seyfried, A.: Hermes - an Evacuation Assistant for Mass Events. inSiDe 7(1), 60–61 (2009), http://inside.hlrs.de/pdfs/inSiDE_spring2009.pdf
Janak, J., Pattnaik, P.: Protein calculations on parallel processors. ii. parallel algorithm for the forces and molecular dynamics. Journal of Computational Chemistry 13(9), 1098–1102 (1992)
Kemloh Wagoum, A.U., Seyfried, A., Holl, S.: Modelling dynamic route choice of pedestrians to assess the criticality of building evacuation. Advances in Complex Systems 15(3) (2012)
Kirchner, A., Schadschneider, A.: Simulation of evacuation processes using a bionics-inspired cellular automaton model for pedestrian dynamics. Physica A 312, 260–276 (2002)
Molnár, P.: Modellierung und Simulation der Dynamik von Fußgängerströmen. Dissertation, Universität Stuttgart (1995)
Richmond, P., Romano, D.: A High Performance Framework For Agent Based Pedestrian Dynamics On GPU Hardware. In: Proceedings of EUROSIS ESM 2008 (European Simulation and Modelling) (October 2008)
Pettré, J., De Heras Ciechomski, P., Maïm, J., Yersin, B., Laumond, J.P., Thalmann, D.: Real-time navigating crowds: scalable simulation and rendering: Research articles. Comput. Animat. Virtual Worlds 17, 445–455 (2006)
Plimpton, S., Hendrickson, B.: Parallel molecular dynamics algorithms for simulation of molecular systems. In: Mattson, T.G. (ed.) Parallel Computing in Computational Chemistry, pp. 114–136 (1995)
Quinn, M.J., Metoyer, R.A., Hunter-zaworski, K.: Parallel implementation of the social forces model. In: Proceedings of the Second International Conference in Pedestrian and Evacuation Dynamics, pp. 63–74 (2003)
Reynolds, C.: Big fast crowds on PS3. In: Proceedings of the 2006 ACM SIGGRAPH Symposium on Videogames (2006)
Schadschneider, A., Klingsch, W., Klüpfel, H., Kretz, T., Rogsch, C., Seyfried, A.: Evacuation Dynamics: Empirical Results, Modeling and Applications. In: Encyclopedia of Complexity and System Science, vol. 5, pp. 3142–3176. Springer, Heidelberg (2009)
Seyfried, A., Chraibi, M., Mehlich, J., Schadschneider, A.: Runtime Optimization of Force Based Models within the Hermes Project. In: Pedestrian and Evacuation Dynamics 2010(2010)
Steffen, B., Kemloh Wagoum, A.U., Chraibi, M., Seyfried, A.: Parallel real time computation of large scale pedestrian evacuations. In: Ivanyi, P., Topping, B.H.V. (eds.) The Second International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering, p. 95. Civil-Comp Press, S (2011) 978-1-905088-44-7
Sutmann, G., Stegailov, V.: Optimization of neighbor list techniques in liquid matter simulations. Journal of Molecular Liquids 125(2-3), 197–203 (2006)
Thompson, P.A.: Developing new techniques for modelling crowd movement. Phd thesis, University of Edinburgh (1994)
Wang, S., Armstrong, M.P.: A quadtree approach to domain decomposition for spatial interpolation in grid computing environments. Parallel Comput. 29, 1481–1504 (2003)
Yu, W.J., Chen, R., Dong, L., Dai, S.: Centrifugal force model for pedestrian dynamics. Phys. Rev. E 72(2), 026112 (2005)
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Kemloh Wagoum, A.U., Steffen, B., Seyfried, A. (2012). Runtime Optimisation Approaches for a Real-Time Evacuation Assistant. In: Wyrzykowski, R., Dongarra, J., Karczewski, K., Waśniewski, J. (eds) Parallel Processing and Applied Mathematics. PPAM 2011. Lecture Notes in Computer Science, vol 7203. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31464-3_39
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DOI: https://doi.org/10.1007/978-3-642-31464-3_39
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