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A Pre-Processing Interface for Steering Exascale Simulations by Intermediate Result Analysis through In-Situ Post-Processing

Matura, Gregor and Basermann, Achim and Chen, Fang and Flatken, Markus and Gerndt, Andreas and Hetherington, James and Krüger, Timm and Nash, Rupert (2014) A Pre-Processing Interface for Steering Exascale Simulations by Intermediate Result Analysis through In-Situ Post-Processing. Advances in Engineering Software. Elsevier. ISSN 0965-9978. (Submitted)

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Official URL: http://www.elsevier.com/locate/advengsoft


Today's simulations are typically not a single application but cover an entire tool chain. There is a tool for initial data creation, for partitioning this data, for actual solving, for afterwards analysis, for visualisation. Each of these tools is separated and so is the data ow. This approach gets unfeasible for an exascale environment. The penalty for every data movement is extreme. A load balance optimised for the solver most likely does not hold true for the complete run time. Compared to tweaking each part, our solution is more disruptive: Merge the tools used and thereby improve overall simulation performance. In this paper, we provide a first step. We combine pre-processing, simulation core and postprocessing. We outline our idea of a general pre-processing interface steering the overall simulation and demonstrate its applicability with the sparse geometry lattice-Boltzmann code HemeLB, intended for hemodynamic simulations. The tasks of the pre-processing tool developed start with partitioning and distributing simulation data. Main aspect is to balance computation and communication costs of the entire simulation by using the costs of each simulation part. Measurement of these costs for each simulation cycle makes possible further performance improvement: Data can be redistributed in between cycles in order to achieve a better load balance according to these costs. Additionally, the pre-processing interface developed offers the possibility of integrating extensions covering, e.g., an automated mesh refinement or fault tolerance awareness. Finally, we investigate the applicability of our interface within HemeLB.

Item URL in elib:https://elib.dlr.de/87024/
Document Type:Article
Title:A Pre-Processing Interface for Steering Exascale Simulations by Intermediate Result Analysis through In-Situ Post-Processing
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Basermann, AchimUNSPECIFIEDhttps://orcid.org/0000-0003-3637-3231UNSPECIFIED
Gerndt, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-0409-8573UNSPECIFIED
Hetherington, JamesUniversity College LondonUNSPECIFIEDUNSPECIFIED
Krüger, TimmUniversity College LondonUNSPECIFIEDUNSPECIFIED
Nash, RupertUniversity College LondonUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Advances in Engineering Software
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
EditorsEmailEditor's ORCID iDORCID Put Code
Noor, A. K.Old Dominion UniversityUNSPECIFIEDUNSPECIFIED
Topping, B. H. V.University of Pécs, Hungary and Heriot-Watt UniversityUNSPECIFIEDUNSPECIFIED
Series Name:Elsevier Advances in Engineering Software
Keywords:Exascale, CRESTA, Partitioner, PPStee, ParMETIS, PTScotch, Zoltan, HemeLB, Pre-processing, Post-processing, In-Situ, Steering Interface
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Vorhaben SISTEC (old)
Location: Braunschweig , Köln-Porz
Institutes and Institutions:Institut of Simulation and Software Technology
Institut of Simulation and Software Technology > Software for Space Systems and Interactive Visualisation
Institut of Simulation and Software Technology > Distributed Systems and Component Software
Deposited By: Basermann, Dr.-Ing. Achim
Deposited On:13 Jan 2014 09:29
Last Modified:03 Aug 2023 11:27

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