From: Daniel Arndt Date: Mon, 28 Aug 2023 18:05:56 +0000 (-0400) Subject: Avoid switches in cuda_tensor_product_kernels.h X-Git-Tag: relicensing~541^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d4d69c10d06fb33e6330c1afc0c72edfc8d0a524;p=dealii.git Avoid switches in cuda_tensor_product_kernels.h --- diff --git a/include/deal.II/matrix_free/cuda_tensor_product_kernels.h b/include/deal.II/matrix_free/cuda_tensor_product_kernels.h index ff82af38ae..2a614281cc 100644 --- a/include/deal.II/matrix_free/cuda_tensor_product_kernels.h +++ b/include/deal.II/matrix_free/cuda_tensor_product_kernels.h @@ -573,38 +573,24 @@ namespace CUDAWrappers n_q_points_1d, Number>::value_at_quad_pts(ViewType u) { - switch (dim) + if constexpr (dim == 1) + values<0, true, false, true>(u, u); + else if constexpr (dim == 2) { - case 1: - { - values<0, true, false, true>(u, u); - - break; - } - case 2: - { - values<0, true, false, true>(u, u); - team_member.team_barrier(); - values<1, true, false, true>(u, u); - - break; - } - case 3: - { - values<0, true, false, true>(u, u); - team_member.team_barrier(); - values<1, true, false, true>(u, u); - team_member.team_barrier(); - values<2, true, false, true>(u, u); - - break; - } - default: - { - // Do nothing. We should throw but we can't from a __device__ - // function. - } + values<0, true, false, true>(u, u); + team_member.team_barrier(); + values<1, true, false, true>(u, u); } + else if constexpr (dim == 3) + { + values<0, true, false, true>(u, u); + team_member.team_barrier(); + values<1, true, false, true>(u, u); + team_member.team_barrier(); + values<2, true, false, true>(u, u); + } + else + Kokkos::abort("dim must not exceed 3!"); } @@ -618,38 +604,24 @@ namespace CUDAWrappers n_q_points_1d, Number>::integrate_value(ViewType u) { - switch (dim) + if constexpr (dim == 1) + values<0, false, false, true>(u, u); + else if constexpr (dim == 2) { - case 1: - { - values<0, false, false, true>(u, u); - - break; - } - case 2: - { - values<0, false, false, true>(u, u); - team_member.team_barrier(); - values<1, false, false, true>(u, u); - - break; - } - case 3: - { - values<0, false, false, true>(u, u); - team_member.team_barrier(); - values<1, false, false, true>(u, u); - team_member.team_barrier(); - values<2, false, false, true>(u, u); - - break; - } - default: - { - // Do nothing. We should throw but we can't from a __device__ - // function. - } + values<0, false, false, true>(u, u); + team_member.team_barrier(); + values<1, false, false, true>(u, u); } + else if constexpr (dim == 3) + { + values<0, false, false, true>(u, u); + team_member.team_barrier(); + values<1, false, false, true>(u, u); + team_member.team_barrier(); + values<2, false, false, true>(u, u); + } + else + Kokkos::abort("dim must not exceed 3!"); } @@ -664,74 +636,57 @@ namespace CUDAWrappers Number>::gradient_at_quad_pts(const ViewTypeIn u, ViewTypeOut grad_u) { - switch (dim) + if constexpr (dim == 1) { - case 1: - { - gradients<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); - - break; - } - case 2: - { - gradients<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); - values<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); - - team_member.team_barrier(); - - values<1, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), - Kokkos::subview(grad_u, Kokkos::ALL, 0)); - gradients<1, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), - Kokkos::subview(grad_u, Kokkos::ALL, 1)); - - break; - } - case 3: - { - gradients<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); - values<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); - values<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 2)); - - team_member.team_barrier(); - - values<1, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), - Kokkos::subview(grad_u, Kokkos::ALL, 0)); - gradients<1, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), - Kokkos::subview(grad_u, Kokkos::ALL, 1)); - values<1, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 2), - Kokkos::subview(grad_u, Kokkos::ALL, 2)); - - team_member.team_barrier(); - - values<2, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), - Kokkos::subview(grad_u, Kokkos::ALL, 0)); - values<2, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), - Kokkos::subview(grad_u, Kokkos::ALL, 1)); - gradients<2, true, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 2), - Kokkos::subview(grad_u, Kokkos::ALL, 2)); - - break; - } - default: - { - // Do nothing. We should throw but we can't from a __device__ - // function. - } + gradients<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); + } + else if constexpr (dim == 2) + { + gradients<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); + values<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); + + team_member.team_barrier(); + + values<1, true, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 0), + Kokkos::subview(grad_u, Kokkos::ALL, 0)); + gradients<1, true, false, true>( + Kokkos::subview(grad_u, Kokkos::ALL, 1), + Kokkos::subview(grad_u, Kokkos::ALL, 1)); + } + else if constexpr (dim == 3) + { + gradients<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); + values<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); + values<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 2)); + + team_member.team_barrier(); + + values<1, true, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 0), + Kokkos::subview(grad_u, Kokkos::ALL, 0)); + gradients<1, true, false, true>( + Kokkos::subview(grad_u, Kokkos::ALL, 1), + Kokkos::subview(grad_u, Kokkos::ALL, 1)); + values<1, true, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 2), + Kokkos::subview(grad_u, Kokkos::ALL, 2)); + + team_member.team_barrier(); + + values<2, true, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 0), + Kokkos::subview(grad_u, Kokkos::ALL, 0)); + values<2, true, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 1), + Kokkos::subview(grad_u, Kokkos::ALL, 1)); + gradients<2, true, false, true>( + Kokkos::subview(grad_u, Kokkos::ALL, 2), + Kokkos::subview(grad_u, Kokkos::ALL, 2)); } + else + Kokkos::abort("dim must not exceed 3!"); } @@ -747,56 +702,44 @@ namespace CUDAWrappers ViewType2 grad_u) { - switch (dim) + if constexpr (dim == 1) { - case 1: - { - values<0, true, false, true>(u, u); - team_member.team_barrier(); - - co_gradients<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); - - break; - } - case 2: - { - values<0, true, false, true>(u, u); - team_member.team_barrier(); - values<1, true, false, true>(u, u); - team_member.team_barrier(); + values<0, true, false, true>(u, u); + team_member.team_barrier(); - co_gradients<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); - co_gradients<1, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); - - break; - } - case 3: - { - values<0, true, false, true>(u, u); - team_member.team_barrier(); - values<1, true, false, true>(u, u); - team_member.team_barrier(); - values<2, true, false, true>(u, u); - team_member.team_barrier(); - - co_gradients<0, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); - co_gradients<1, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); - co_gradients<2, true, false, false>( - u, Kokkos::subview(grad_u, Kokkos::ALL, 2)); - - break; - } - default: - { - // Do nothing. We should throw but we can't from a __device__ - // function. - } + co_gradients<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); + } + else if constexpr (dim == 2) + { + values<0, true, false, true>(u, u); + team_member.team_barrier(); + values<1, true, false, true>(u, u); + team_member.team_barrier(); + + co_gradients<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); + co_gradients<1, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); } + else if constexpr (dim == 3) + { + values<0, true, false, true>(u, u); + team_member.team_barrier(); + values<1, true, false, true>(u, u); + team_member.team_barrier(); + values<2, true, false, true>(u, u); + team_member.team_barrier(); + + co_gradients<0, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 0)); + co_gradients<1, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 1)); + co_gradients<2, true, false, false>( + u, Kokkos::subview(grad_u, Kokkos::ALL, 2)); + } + else + Kokkos::abort("dim must not exceed 3!"); } @@ -811,77 +754,70 @@ namespace CUDAWrappers Number>::integrate_gradient(ViewType1 u, ViewType2 grad_u) { - switch (dim) + if constexpr (dim == 1) { - case 1: - { - gradients<0, false, add, false>( - Kokkos::subview(grad_u, Kokkos::ALL, dim), u); - - break; - } - case 2: - { - gradients<0, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), - Kokkos::subview(grad_u, Kokkos::ALL, 0)); - values<0, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), - Kokkos::subview(grad_u, Kokkos::ALL, 1)); - - team_member.team_barrier(); - - values<1, false, add, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), u); - team_member.team_barrier(); - gradients<1, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), u); - - break; - } - case 3: - { - gradients<0, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), - Kokkos::subview(grad_u, Kokkos::ALL, 0)); - values<0, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), - Kokkos::subview(grad_u, Kokkos::ALL, 1)); - values<0, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 2), - Kokkos::subview(grad_u, Kokkos::ALL, 2)); - - team_member.team_barrier(); - - values<1, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), - Kokkos::subview(grad_u, Kokkos::ALL, 0)); - gradients<1, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), - Kokkos::subview(grad_u, Kokkos::ALL, 1)); - values<1, false, false, true>( - Kokkos::subview(grad_u, Kokkos::ALL, 2), - Kokkos::subview(grad_u, Kokkos::ALL, 2)); - - team_member.team_barrier(); - - values<2, false, add, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), u); - team_member.team_barrier(); - values<2, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), u); - team_member.team_barrier(); - gradients<2, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 2), u); - - break; - } - default: - { - // Do nothing. We should throw but we can't from a __device__ - // function. - } + gradients<0, false, add, false>( + Kokkos::subview(grad_u, Kokkos::ALL, dim), u); + } + else if constexpr (dim == 2) + { + gradients<0, false, false, true>( + Kokkos::subview(grad_u, Kokkos::ALL, 0), + Kokkos::subview(grad_u, Kokkos::ALL, 0)); + values<0, false, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 1), + Kokkos::subview(grad_u, + Kokkos::ALL, + 1)); + + team_member.team_barrier(); + + values<1, false, add, false>(Kokkos::subview(grad_u, Kokkos::ALL, 0), + u); + team_member.team_barrier(); + gradients<1, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 1), u); } + else if constexpr (dim == 3) + { + gradients<0, false, false, true>( + Kokkos::subview(grad_u, Kokkos::ALL, 0), + Kokkos::subview(grad_u, Kokkos::ALL, 0)); + values<0, false, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 1), + Kokkos::subview(grad_u, + Kokkos::ALL, + 1)); + values<0, false, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 2), + Kokkos::subview(grad_u, + Kokkos::ALL, + 2)); + + team_member.team_barrier(); + + values<1, false, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 0), + Kokkos::subview(grad_u, + Kokkos::ALL, + 0)); + gradients<1, false, false, true>( + Kokkos::subview(grad_u, Kokkos::ALL, 1), + Kokkos::subview(grad_u, Kokkos::ALL, 1)); + values<1, false, false, true>(Kokkos::subview(grad_u, Kokkos::ALL, 2), + Kokkos::subview(grad_u, + Kokkos::ALL, + 2)); + + team_member.team_barrier(); + + values<2, false, add, false>(Kokkos::subview(grad_u, Kokkos::ALL, 0), + u); + team_member.team_barrier(); + values<2, false, true, false>(Kokkos::subview(grad_u, Kokkos::ALL, 1), + u); + team_member.team_barrier(); + gradients<2, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 2), u); + } + else + Kokkos::abort("dim must not exceed 3!"); } @@ -897,61 +833,49 @@ namespace CUDAWrappers ViewType2 grad_u) { - switch (dim) + if constexpr (dim == 1) { - case 1: - { - co_gradients<0, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), u); - team_member.team_barrier(); - - values<0, false, false, true>(u, u); + co_gradients<0, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 0), u); + team_member.team_barrier(); - break; - } - case 2: - { - co_gradients<1, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), u); - team_member.team_barrier(); - co_gradients<0, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), u); - team_member.team_barrier(); - - values<1, false, false, true>(u, u); - team_member.team_barrier(); - values<0, false, false, true>(u, u); - team_member.team_barrier(); - - break; - } - case 3: - { - co_gradients<2, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 2), u); - team_member.team_barrier(); - co_gradients<1, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 1), u); - team_member.team_barrier(); - co_gradients<0, false, true, false>( - Kokkos::subview(grad_u, Kokkos::ALL, 0), u); - team_member.team_barrier(); - - values<2, false, false, true>(u, u); - team_member.team_barrier(); - values<1, false, false, true>(u, u); - team_member.team_barrier(); - values<0, false, false, true>(u, u); - team_member.team_barrier(); - - break; - } - default: - { - // Do nothing. We should throw but we can't from a __device__ - // function. - } + values<0, false, false, true>(u, u); + } + else if constexpr (dim == 2) + { + co_gradients<1, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 1), u); + team_member.team_barrier(); + co_gradients<0, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 0), u); + team_member.team_barrier(); + + values<1, false, false, true>(u, u); + team_member.team_barrier(); + values<0, false, false, true>(u, u); + team_member.team_barrier(); + } + else if constexpr (dim == 3) + { + co_gradients<2, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 2), u); + team_member.team_barrier(); + co_gradients<1, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 1), u); + team_member.team_barrier(); + co_gradients<0, false, true, false>( + Kokkos::subview(grad_u, Kokkos::ALL, 0), u); + team_member.team_barrier(); + + values<2, false, false, true>(u, u); + team_member.team_barrier(); + values<1, false, false, true>(u, u); + team_member.team_barrier(); + values<0, false, false, true>(u, u); + team_member.team_barrier(); } + else + Kokkos::abort("dim must not exceed 3!"); } } // namespace internal } // namespace CUDAWrappers