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Seehttps://ddc.mdls.fr/

DDC, is a C++-17 library that aims to offer to the C++/MPI world an equivalent to thexarray.DataArray/dask.Array python environment.Where these two libraries are based onnumpy, DDC relies onKokkos andmdspan to offer CPU/GPU performance-portable multi-dimensional arrays and iterators.

DDC aims to offer abstractions to represent:

• tagged continuous dimensions,
• discretizations of these (multiple kinds of meshes, function spaces, Fourier, etc.),
• domains in these discretized dimensions,
• associating data to the elements of these discrete domains,
• efficient distribution and iteration over this data.

All these abstractions are handled at compilation using C++ template meta-programming to ensure zero overhead at execution and enable developers to change their design choices (e.g. from a regular mesh to a non-uniform one) with performance portability.

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To use DDC core, one needs the following dependencies:

• a C++17-compliant compiler
• CMake 3.25...<4
• Kokkos 4.4...<6
• (optional, micro benchmarking) Benchmark 1.8...<2
• (optional, documentation) Doxygen 1.8.13...<2
• (optional, unit-testing) GoogleTest 1.14...<2

To use DDC components, one needs the following dependencies:

• (optional, fft interface) DDC::fft
  • Kokkos-fft 0.3.0...<1
• (optional, IO interface) DDC::pdi
  • PDI 1.6...<2
• (optional, spline interpolation) DDC::splines
  • Ginkgo 1.8...<2
  • Kokkos Kernels 4.5.1...<6

Please seethis page for a detailed installation guide.

Please seethis page for details on how to contribute.

• Kokkos 4.5.0 embeds a version of mdspan that is not compatible with DDC, seekokkos/mdspan#368. This issue has been fixed in Kokkos 4.5.1.