Solving DWF Dirac Equation Using Multisplitting Preconditioned Conjugate Gradient

Jiqun Tu

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arXiv · 1811.08488

Solving DWF Dirac Equation Using Multisplitting Preconditioned Conjugate Gradient

Jiqun Tu

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Abstract

We show that using the multisplitting algorithm as a preconditioner for conjugate gradient inversion of the domain wall fermion Dirac operator could effectively reduce the inter-node communication cost, at the expense of performing more on-node floating point operations. This method could be useful for supercomputers with far more on-node flops than inter-node communication bandwidth.

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Jiqun Tu. 2018-11-20. Solving DWF Dirac Equation Using Multisplitting Preconditioned Conjugate Gradient. https://arxiv.org/abs/1811.08488

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