MOOSE Newsletter (September 2025)

Preliminary Kokkos-MOOSE release

A new GPU backend, Kokkos, was added in MOOSE and is available for preliminary testing with NVIDIA GPUs. Kokkos-MOOSE provides programming and user interfaces that are designed to resemble the original MOOSE interfaces to make adaptation easier and reduce porting efforts. Kokkos-MOOSE currently supports the GPU version of Kernels, NodalKernels, BCs, and Materials and will be continuously extended to incorporate more MOOSE capabilities and support more GPU vendors. See this page to get started with Kokkos-MOOSE.

TestHarness --only-tests-that-require option

The capability parameter for test specifications allows for run-time checking of if a test can or cannot run based on capabilities defined by the application executable. The --only-tests-that-require command line option has been added to the TestHarness, which allows filtering of tests based on whether or not they depend on a capability.

For example, take a situation in which ./run_tests --only-tests-that-require cuda is ran along with the following test specification:

[Tests]
  [needs_cuda]
    ...
    capabilities = 'cuda'
  []
  [doesnt_need_cuda]
    ...
    capabilities = 'libtorch'
  []
[]

In this case, the test needs_cuda will be ran beacuse it depends on the cuda capability, while the doesnt_need_cuda test will not run because it does not depend on the cuda capability.