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Adding AlbanyLaunchBounds to control Kokkos Launch Bounds configurations for GPU kernel optimization #1126

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Adding AlbanyLaunchBounds to control Kokkos Launch Bounds configurations for GPU kernel optimization #1126

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5 changes: 3 additions & 2 deletions src/landIce/evaluators/LandIce_StokesFOResid.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@

#include "Albany_Layouts.hpp"
#include "PHAL_Dimension.hpp"
#include "Albany_KokkosUtils.hpp"

namespace LandIce {
/** \brief Finite Element Interpolation Evaluator
Expand Down Expand Up @@ -77,8 +78,8 @@ class StokesFOResid : public PHX::EvaluatorWithBaseImpl<Traits>,
struct POISSON_2D_Tag{};

typedef Kokkos::RangePolicy<ExecutionSpace,LandIce_3D_Tag> LandIce_3D_Policy;
typedef Kokkos::RangePolicy<ExecutionSpace,LandIce_3D_Opt_Tag<8>> LandIce_3D_Opt_Hex_Policy;
typedef Kokkos::RangePolicy<ExecutionSpace,LandIce_3D_Opt_Tag<6>> LandIce_3D_Opt_Wedge_Policy;
typedef Kokkos::RangePolicy<ExecutionSpace,KU::AlbanyLaunchBounds,LandIce_3D_Opt_Tag<8>> LandIce_3D_Opt_Hex_Policy;
typedef Kokkos::RangePolicy<ExecutionSpace,KU::AlbanyLaunchBounds,LandIce_3D_Opt_Tag<6>> LandIce_3D_Opt_Wedge_Policy;
typedef Kokkos::RangePolicy<ExecutionSpace,POISSON_3D_Tag> POISSON_3D_Policy;
typedef Kokkos::RangePolicy<ExecutionSpace,LandIce_2D_Tag> LandIce_2D_Policy;
typedef Kokkos::RangePolicy<ExecutionSpace,LandIce_XZ_2D_Tag> LandIce_XZ_2D_Policy;
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6 changes: 6 additions & 0 deletions src/utility/Albany_KokkosUtils.hpp
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Expand Up @@ -97,6 +97,12 @@ atomic_add(D dst, const V& val)
KU::AtomicAddImpl<ExeSpace, D, V>::atomic_add(dst, val);
}

#ifdef KOKKOS_ENABLE_CUDA
typedef Kokkos::LaunchBounds<> AlbanyLaunchBounds;
#else
typedef Kokkos::LaunchBounds<128,2> AlbanyLaunchBounds;
#endif

}

#endif // ALBANY_KOKKOS_UTILS_HPP
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