Sourcebook of parallel computing
Sourcebook of parallel computing
Patterns for parallel programming
Patterns for parallel programming
A design pattern language for engineering (parallel) software: merging the PLPP and OPL projects
Proceedings of the 2010 Workshop on Parallel Programming Patterns
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Dalton is a molecular electronic structure program featuring common methods of computational chemistry that are based on pure quantum mechanics (QM) as well as hybrid quantum mechanics/molecular mechanics (QM/MM). It is specialized and has a leading position in calculation of molecular properties with a large world-wide user community (over 2000 licenses issued). In this paper, we present a performance characterization and optimization of Dalton. We also propose a solution to avoid the master/worker design of Dalton to become a performance bottleneck for larger process numbers. With these improvements we obtain speedups of 4x, increasing the parallel efficiency of the code and being able to run in it in a much bigger number of cores.