The Parallel Systems Group carries out research to facilitate the use of extreme-scale computers for scientific discovery. We are especially focused on tools research to maximize the effectiveness of …

Parallel MPI Strong Scalability of a 3D Noh Implosion Simulation with Q2-Q1 Finite Elements MPI simulation up to 512 processors with fixed total problem size. Unstructured parallel domain …

Massively Parallel Computing Initiative (MPCI) 1989 Exploring massively parallel architectures 1989 LLNL’s Laboratory Directed Research and Development Program funded the Massively Parallel …

Computing at LLNL advances scientific discovery through foundational and innovative research; mission-driven data science; complex modeling, simulation, and analysis on powerful …

The resulting parallel-in-time method is a scalable multigrid reduction in time (MGRIT) approach. MGRIT constructs coarse time grids by coarsening every few time steps on a given level and uses each …

SAMRAI (Structured Adaptive Mesh Refinement Application Infrastructure) is an object-oriented C++ software library that enables exploration of numerical, algorithmic, parallel computing, and software …

BLAST is a high-order finite element hydrodynamics research code that improves the accuracy of simulations and provides a path to extreme parallel computing and exascale architectures.

The hypre library's comprehensive suite of scalable parallel linear solvers makes large-scale scientific simulations possible by solving problems faster.

RAJA provides an array of parallel kernel execution interfaces to support a variety of loop and execution patterns, plus constructs for portable reductions, scans, sorts, and atomic operations. Table 2 …

The SAMRAI library is the code base in CASC for exploring application, numerical, parallel computing, and software issues associated with structured adaptive mesh refinement.