Impact of load balancing on unstructured adaptive grid computations for distributed-memory multiprocessors

Andrew Sohn, Rupak Biswas, Horst D. Simon

Research output: Contribution to journalConference article

12 Scopus citations

Abstract

The computational requirements for an adaptive solution of unsteady problems change as the simulation progresses. This causes workload imbalance among processors on a parallel machine which, in turn, requires significant data movement at runtime. We present a new dynamic load-balancing framework, called JOVE, that balances the workload across all processors with a global view. Whenever the computational mesh is adapted, JOVE is activated to eliminate the load imbalance. JOVE has been implemented on an IBM SP2 distributed-memory machine in MPI for portability. Experimental results for two model meshes demonstrate that mesh adaption with load balancing gives more than a sixfold improvement over one without load balancing. We also show that JOVE gives a 24-fold speedup on 64 processors compared to sequential execution.

Original languageEnglish (US)
Pages (from-to)26-33
Number of pages8
JournalIEEE Symposium on Parallel and Distributed Processing - Proceedings
StatePublished - Dec 1 1996
EventProceedings of the 1996 8th IEEE Symposium on Parallel and Distributed Processing - New Orleans, LA, USA
Duration: Oct 23 1996Oct 26 1996

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

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