AMG2023 is a parallel algebraic multigrid solver for linear systems arising from problems on unstructured grids. The driver provided here builds linear systems for various 3-dimensional problems. It requires an installation of hypre-2.27.0 or higher.
AMG2023 is written in C. It is a SPMD code which uses MPI and OpenMP threading within MPI tasks. Parallelism is achieved by data decomposition, which is here achieved by simply subdividing the grid into logical P x Q x R (in 3D) chunks of equal size. It can also be used on NVIDIA, AMD, and Intel GPUs via CUDA, HIP, and SYCL.
AMG2023 is distributed under the terms of both the MIT license and the Apache License (Version 2.0).
AMG2023 uses a simple Makefile system for building the code. All compiler and link options are set by modifying it appropriately.
To build the code, first install hypre, which can be cloned from https://github.com/hypre-space/hypre .
Then modify the 'Makefile' file appropriately.
Then type
make
Other available targets are
make clean (deletes .o files)
make veryclean (deletes .o files, libraries, and executables)
Further information is available in the 'amg-doc' file.
For more information, see the 'amg-doc' file in the distribution.
LLNL-CODE-846758