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Title: Performance model for mesh optimization on distributed-memory computers
Authors: Benítez Díaz, Domingo Juan 
Escobar, J. M. 
Montenegro, R. 
Rodriguez, E. 
UNESCO Clasification: 1203 Ciencia de los ordenadores
1206 Análisis numérico
Issue Date: 2018
Publisher: Association for Computing Machinery
Conference: 25th European MPI Users' Group Meeting, EuroMPI 2018 
Abstract: Many mesh optimization applications are based on vertex repositioning algorithms (VrPA). The execution times of these numerical algorithms vary widely, usually with a trade-off between different parameters. In this work, we analyze the impacts of six parameters of sequential VrPA on runtime. Our analysis is used to propose a new workload measure called number of mesh element evaluations. Since the execution time required for VrPA programs may be too large and there is concurrency in processing mesh elements, parallelism has been used to improve performance efficiently. The performance model is extended to parallel VrPA algorithms that are implemented in MPI. This model has been validated using two Open MPI versions on two distributed-memory computers and is the basis for the quantitative analysis of performance scalability, load balancing and synchronization and communication overheads. Finally, a new approach to mesh partitioning that improves load balancing is proposed.
ISBN: 978-1-4503-6492-8
DOI: 10.1145/3236367.3236372
Source: EuroMPI'18: 25th European MPI Users' Group Meeting Barcelona Spain September, 2018
Appears in Collections:Actas de congresos
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