Fix out-of-bounds-errors in GPU Comm schemes + add tests for MemcpyPackInfo

Frederik Hennigrequested to merge
fhennig/gpu-comm-scheme-streams into master
  • When using incomplete stencils, accesses into the streams_ array in UniformGPUScheme and NonuniformGPUScheme used to go out-of-bounds for higher-order velocities. This is fixed by using Stencil::idx to translate the direction to a linear index.
  • Extend API of MemcpyPackInfo to permit customization of the number of ghost layers to be communicated
  • Add a test app for UniformGpuScheme + MemcpyPackInfo testing this (previously untested) pack info for several stencils and GL counts
  • Adapt CMake definitions of GPU test suite to run with HIP also
Edited by Frederik Hennig

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