The Quest For A High Performance Boltzmann Transport Solver
Author(s)
P. N. Brown, B. Chang, U. R. Hanebutte and C. S. Woodward
Abstract
The quest for a high performance Boltzmann
transport solver
P. N. Brown, B. Chang, U. R. Hanebutte & C. S. Woodward
Center/or Applied Scientific Computing, Lawrence Livermore National
Laboratory, USA.
Abstract
A 3-d Boltzmann transport code developed at Lawrence Livermore National
Laboratory exploits concurrency (problem permitting) with respect to all phase
space variables represented by direction, position and energy. To demonstrate the
capabilities of the code, a highly resolved Boltzmann transport calculation with
27.6 billion unknowns (332 billion discretization points) was performed on 4992
processors of the IBM RS/6000 SP ASCI Blue machine at Lawrence Livermore
National Laboratory. Detailed performance measurements were collected during
this calculation. Analyzing the timing data revealed a relatively modest
performance, i.e. obtained fraction of peak performance. A detailed study of the
performance data confirmed that this modest performance was caused by low
utiliz
Keywords
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