Zero-Copy

pyAMReX is designed to bridge the worlds of block-structured codes and data science. As such, it includes zero-copy GPU data access for AI/ML, in situ analysis, application coupling by implementing standardized data interfaces <developers-implementation.

CPU: numpy

zero-copy read and write access. CPU as well as managed memory CPU/GPU.

Call .to_numpy() on data objects of pyAMReX. See the optional arguments of this API.

Writing to the created numpy array will also modify the underlying AMReX memory.

GPU: cupy

GPU zero-copy read and write access.

Call .to_cupy() on data objects of pyAMReX. See the optional arguments of this API.

Writing to the created cupy array will also modify the underlying AMReX memory.

GPU: numba

GPU zero-copy read and write access.

After from numba import cuda, create a zero-copy tensor on a GPU array via marr_numba = cuda.as_cuda_array(marr).

Writing to the created numba array will also modify the underlying AMReX memory.

AI/ML: pyTorch

CPU and GPU zero-copy read and write access.

Create a zero-copy tensor on a GPU array via torch.as_tensor(amrex_array_here, device="cuda").

Writing to the created PyTorch tensor will also modify the underlying AMReX memory.