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Add GPU-aware MPI halo exchange for MPMesh - #90

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Shahrear2000 wants to merge 12 commits into

dn/Velocity_solver_improvementfrom

sj/gpu-aware-mpi-halo-exchange

Commits on Sep 25, 2026
- Add CUDA-aware MPI halo exchange
  Shahrear Jahan Santho
  committed
  7ba0b24
- Add GPU-aware halo exchange, unit test and cleanup
  Shahrear Jahan Santho
  committed
  ce6cfc9
- Clean up unrelated formatting changes
  Shahrear Jahan Santho
  committed
  7760bae
- Clean up remaining unrelated formatting changes
  Shahrear Jahan Santho
  committed
  b993971
- Clean up remaining formatting changes
  Shahrear Jahan Santho
  committed
  e509612
- Clean up
  Shahrear Jahan Santho
  committed
  b096020
- Make GPU-aware MPI a CMake option, on by default for Cray GPU builds
  Shahrear2000
  committed
  7a46fd5
- CI: launch MPI tests with MPICH's mpiexec
  Shahrear2000
  committed
  1d95e6a
- CI: restrict UCX transports so MPICH initializes on GitHub runners
  Shahrear2000
  committed
  95c1885
- Revert "CI: restrict UCX transports so MPICH initializes on GitHub runners"
  Shahrear2000
  committed
  78452b8
- Revert "CI: launch MPI tests with MPICH's mpiexec"
  Shahrear2000
  committed
  29031aa
- Skip GPU-aware halo exchange test when not run with 4 MPI ranks
  Shahrear2000
  committed
  fdb7efd