Cartwright, Keith L.; Bettencourt, Matthew T.; Pointon, Timothy D.; Beckwith, Kristian B.; Cyr, Eric C.; Kramer, Richard K.; McDoniel, William M.; Miller, Sean T.; Roberts, Nathan V.; Radtke, Gregg R.; Shields, Sidney S.; Swan, Matthew S.; Moore, Christopher H.
This is the DARMA FY19-Q1 interim report. This page intentionally left blank. This document was generated with the Automatic Report Generator (ARG). This page intentionally left blank.
This report documents the outcome from the ASC ATDM Level 2 Milestone 6358: Assess Status of Next Generation Components and Physics Models in EMPIRE. This Milestone is an assessment of the EMPIRE (ElectroMagnetic Plasma In Realistic Environments) application and three software components. The assessment focuses on the electromagnetic and electrostatic particle-in-cell solu- tions for EMPIRE and its associated solver, time integration, and checkpoint-restart components. This information provides a clear understanding of the current status of the EMPIRE application and will help to guide future work in FY19 in order to ready the application for the ASC ATDM L 1 Milestone in FY20. It is clear from this assessment that performance of the linear solver will have to be a focus in FY19.
A block base sparse approximate inverse preconditioner for the electric field integral equations is documented and tested. It utilized the Kokkos library for performance portability and shows superior performance when compared to a direct method, 36x faster for a 112K DOF problem. Furthermore, due to the abstractions available in the Kokkos library it allows one to migrate from CPU to GPU in a trivial way.