Version 0.7

New Features

• Support for neighbor iteration without stored neighbors (LinkedCellList binning used within neighbor_parallel_for)
• Global particle communication based on the grid: Grid::GlobalParticleComm
• Added particle removal (without MPI): remove
• Added neighbor list histograms
• Added interfaces for total and maximum neighbors

Bug Fixes and Improvements

• Added support for Kokkos::View in neighbor lists and spatial binning
• Performance benchmark and benchmark plotting improvements
• Fixed memory leaks in HYPRE solver interfaces
• Updated ArborX neighbor interface for compatibility with newest versions
• Added subfiling support for HDF5 particle output

Minimum dependency version updates

• Kokkos minimum 4.1 (previously 3.7)

Version 0.6.1

Bug fixes

• Sets accurate CMake project version
• Allows compatibility with SameMajorVersion for downstream CMake projects
• Guard against including HDF5 directories if HDF5 is not enabled
• Include <iostream> where it's used
• Improve warnings for previous cabanacore and Cajita targets and simplify new Core and Grid targets
• Fix for heFFTe integer overflow with large system sizes
• Fix use of deprecated code in Cajita deprecation wrappers

Version 0.6.0

New Features

• C++17 required
• Gather/Scatter for persistent particle communication buffers added
• Grid-based particle generation, in addition to generalization of random particle generation
• ParticleList with field type tags and thread-level particle interfaces added
• Semi-structured hypre interface for multi-variate systems
• New interface to modify an existing Verlet neighbor list
• New benchmarks for grid halo and particle-grid interpolation

Bug Fixes and Improvements

• Breaking change: replace Slice::{R->r}ank and Slice::{rank->viewRank}()
• Fixed boundary index space bug for Node, Face, and Edge entities causing out of bounds indexing
• Added SYCL support for heFFTe
• Removed use of Kokkos deprecated features: View::Rank and parallel_reduce() on raw pointers
• Run benchmarks and examples with default or default host backends
• Added Kokkos profiling regions
• Added python utilities to plot benchmark results

Deprecated features

• Deprecated Cajita in favor of Cabana::Grid
• Deprecated Kokkos DeviceType class templates in favor of Kokkos MemorySpace
• Deprecated Grid Halo and Partitioner compatibility wrappers

Minimum dependency version updates

• Kokkos minimum 3.7 (previously 3.2)
• Optional dependency heFFTe minimum 2.3 (previously 2.1)
• Optional dependency googletest minimum 1.10 (previous internal download removed)

Experimental Features (subject to change in future releases)

• Distributed particle output with HDF5 library interface
• Expanded sparse grid capabilities: index spaces, local grid, array, and halo

Version 0.5.0

New Features

• Particle migration using Cajita grid added
• Random particle generation added
• Complete Cajita tutorial examples added
• Cajita performance benchmarks added

Bug Fixes and Improvements

• Remove all uses of Kokkos::Impl
• Redesign SimdPolicy to not modify the underlying Kokkos::TeamPolicy
• Rename Cabana_REQUIRE_{PTHREAD -> THREADS}
• Rename clang-format build rule format -> cabana-format
• Improved Doxygen coverage
• Improved wiki documentation

Minimum dependency version updates

• CMake minimum 3.16 required (previously 3.9)
• Optional dependency heFFTe minimum 2.1 (previously 2.0)
• Optional dependency HYPRE minimum 2.22.1 (previously 2.22.0)

Experimental Features (subject to change in future releases)

• Distributed particle output with SILO library interface
• Cajita load balancing added through ALL library interface

Version 0.4.0

New Features

• C++14 required
• AMD HIP support and continuous integration testing
• Intel SYCL support and continuous integration testing
• Hybrid particle-grid capability through the Cajita interfaces. Features include:
  • 2D/3D structured grid data structures
  • particle-grid interpolation
  • particle-grid communication
  • multidimensional distributed FFTs via heFFTe
  • linear solvers and preconditions via HYPRE

Bug Fixes and Improvements

• Removed deprecated portability macros in favor of Kokkos macros (e.g. KOKKOS_INLINE_FUNCTION)
• General performance improvements including neighbor list and particle communication updates
• Improved Doxygen coverage, wiki documentation, and tutorials

Experimental Features (subject to change in future releases)

• Sparse grids support in Cajita
• Structured grid data I/O in Cajita

Version 0.3.0

New Features

• Updated Kokkos dependency to version 3.1
• CUDA and HIP support and testing in continuous integration
• Mirror view capability for AoSoA
• New performance benchmarks for sorting, communication, and neighbor lists
• Improving AoSoA memory managment with empty() and shrinkToFit()
• Second level neighbor parallel for and reduce algorithms for triplet operations
• Unmanaged AoSoA for wrapping user memory

Bug Fixes and Improvements

• Using new CMake target for linking Kokkos
• Removed numerous instances of default allocation of Kokkos Views
• Eliminated use of user-defined MPI tags in communication algorithms
• Cleaned usage of deprecated Kokkos code
• Update for compilation with C++14
• Significant performance enhancements to communication code

Experimental Features (subject to change in future releases)

• Tree-based neighbor lists using ArborX

Version 0.2.0

New Features

• An optional MPI dependency has been added. Note that when CUDA is enabled the MPI implementation is expected to be CUDA-aware. (#45)
• Particle redistribution via MPI. Implemented in the Cabana::Distributor (#43)
• Particle halo exchange via MPI. Implemented in the Cabana::Halo (#43)
• Parallel for concept for 2D indexing in AoSoA loops. Implemented via Cabana::simd_parallel_for. Includes a new execution space concept Cabana::SimdPolicy. (#49)
• Parallel for concept for traversing neighbor lists. Implemented via Cabana::neighbor_parallel_for (#49)
• Continuous integration for pull requests via GitHub (#9)
• Support the ECP continuous integration infrastructure (#66)
• New example using scafacos for long-range solvers (#46)
• Additional tutorials documentation on the Wiki

Bug Fixes and Improvements

• Fixed a bug in the construction of slices on uninitialized AoSoA containers (#80)
• Construct Verlet lists over the specified range of indices (#70)
• Removed aliases of Kokkos macros and classes (#58)

Version 0.1.0

New Features

• Core portable data structures: Tuple, SoA, AoSoA, and Slice
• DeepCopy: deep copy of data between AoSoA data structures
• Sorting and binning AoSoA data structures
• LinkedCellList: linked cell list implementation
• Portable neighbor list interface
• VerletList - linked cell accelerated Verlet list implementation
• Basic tutorial

Experimental Features (subject to change in future releases)

• parallel_for - portable parallel loops over supported execution spaces
• neighbor_parallel_for - portable parallel loops over neighbor lists in supported execution spaces
• RangePolicy - defines an index range for parallel loops