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Shallow Water Simulations on Multiple GPUs

Shallow Water Simulations on Multiple GPUs

Category
Journal publication
Abstract
We present a state-of-the-art shallow water simulator running on multiple GPUs. Our implementation is based on an explicit high-resolution finite volume scheme suitable for modeling dam breaks and flooding. We use row domain decomposition to enable multi-GPU computations, and perform traditional CUDA block decomposition within each GPU for further parallelism. Our implementation shows near perfect weak and strong scaling, and enables simulation of domains consisting of up-to 235 million cells at a rate of over 1.2 gigacells per second using four Fermi-generation GPUs. The code is thoroughly benchmarked using three different systems, both high-performance and commodity-level systems.
Language
English
Author(s)
  • Sætra Martin Lilleeng
  • Brodtkorb André Rigland
Affiliation
  • University of Oslo
  • SINTEF Digital / Mathematics and Cybernetics
Year
2012
Published in
Lecture Notes in Computer Science (LNCS)
ISSN
0302-9743
Volume
7134
Page(s)
56 - 66