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Simulation Models Verification for Resilient Communication on a Highly Adaptive Energy-Efficient Computer

Pfennig, Stefan and Feldhoff, Kim and Ciorba, Florina M. and Bielert, Mario and Franz, Elke and Ilsche, Thomas and Reiher, Tobias and Nagel, Wolfgang E.. (2016) Simulation Models Verification for Resilient Communication on a Highly Adaptive Energy-Efficient Computer. In: HPC '16 Proceedings of the 24th High Performance Computing Symposium .

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Abstract

The utility of simulations depends on the confidence in the simulation implementation and its results. This study discusses the verification of the communication models in the parallel trace-driven simulation framework HAEC-SIM. As simulation input, a parallel application is executed and recorded on an existing HPC system. The simulation focuses on modeling the transfer times of point-to-point messages within the application and the indirect effects resulting in an output trace of application events of the simulated execution on a target platform. Consequently, via verification the mes- sage transfer times obtained with HAEC-SIM are compared with those of an independent implementation of the commu- nication models. Both implementations consider the number of hops, the size and the target system parameters for each message. During verification the following factors are var- ied: application benchmarks, network topologies, mapping strategies, and resilient communication models. Verification yields an almost perfect agreement: the transfer times differ for a tiny percentage (0.00019 %) of messages by a negligible deviation of one picosecond, which is the finest granularity of the time data type. This result strengthens the confidence in a correct implementation of the communication models in simulation.
Faculties and Departments:05 Faculty of Science > Departement Mathematik und Informatik > Informatik > High Performance Computing (Ciorba)
UniBasel Contributors:Ciorba, Florina M.
Item Type:Conference or Workshop Item, refereed
Conference or workshop item Subtype:Conference Paper
Publisher:Society for Computer Simulation International
ISBN:978-1-5108-2318-1
Note:Publication type according to Uni Basel Research Database: Conference paper
Language:English
Identification Number:
Last Modified:18 May 2018 14:17
Deposited On:04 Oct 2017 13:18

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