Jul 22 – 28, 2018
Kellogg Hotel and Conference Center
EST timezone

Solving Domain Wall Dirac Equation Using Multisplitting Preconditioned Conjugate Gradient

Jul 23, 2018, 4:10 PM
103 (Kellogg Hotel and Conference Center)


Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Algorithms and Machines Algorithms and Machines


Jiqun Tu (Columbia)


We show that using the multisplitting algorithm as a preconditioner for the conjugate gradient inversion of domain wall fermion Dirac operators effectively reduces the inter-node communication cost, at the expense of performing more on-node floating point operations. Compared to Schwarz domain decomposition solver algorithms our approach enforces Dirichlet boundary conditions consistently on the normal preconditioned operator. This method would be useful for lattice Monte Carlo evolutions on supercomputers with far more on-node flops than inter-node communication bandwidth.

Primary author

Jiqun Tu (Columbia)


Mr Duo Guo (Columbai University) Prof. Robert Mawhinney (Columbia University)

Presentation materials