Software Technology

Mathematical Libraries

ALExa: Accelerated Libraries for Exascale

Principal Investigators: Wayne Joubert, lead, Oak Ridge National Laboratory (ORNL); Judy Hill, ORNL; John Turner, ORNL

The ALExa project focuses on preparing DTK and TASMANIAN for exascale platforms and integrating these libraries into ECP applications.  These libraries deliver capabilities identified as needs of ECP applications: (1) the ability to transfer computed solutions between grids with differing layouts on parallel accelerated architectures (DTK), enabling simulation projects such as ExaAM and ExaSMR to seamlessly combine results from different computational grids to perform their required simulations; and (2) the ability to construct surrogate models with low memory footprint low cost, and optimal computational throughput, that would enable the use of methods for optimization and uncertainty quantification for large scale engineering problems, as well efficient multi-physics simulations in project such as ExaStar.

Component libraries:

  • • DTK (Data Transfer Kit): multiphysics grid data transfer
  • • TASMANIAN (Toolkit for Adaptive Stochastic Modeling and Non-Intrusive Approximation): sparse grid surrogate models, UQ.