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Diffstat (limited to 'examples/poiseulle_particles_2d_gpu/poiseulle_2d_gpu.cpp')
| -rw-r--r-- | examples/poiseulle_particles_2d_gpu/poiseulle_2d_gpu.cpp | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/examples/poiseulle_particles_2d_gpu/poiseulle_2d_gpu.cpp b/examples/poiseulle_particles_2d_gpu/poiseulle_2d_gpu.cpp new file mode 100644 index 0000000..1fcfd9c --- /dev/null +++ b/examples/poiseulle_particles_2d_gpu/poiseulle_2d_gpu.cpp @@ -0,0 +1,386 @@ +#include <kel/lbm/lbm.hpp> +#include <AdaptiveCpp/sycl/sycl.hpp> + +#include <forstio/codec/data.hpp> + +template<typename T> +using SyclHostAlloc = acpp::sycl::usm_allocator<saw::data<T>, acpp::sycl::usm::alloc::host>; + +namespace kel { +namespace lbm { +namespace sch { +using namespace saw::schema; + +/** + * Basic distribution function + * Base type + * D + * Q + * Scalar factor + * D factor + * Q factor + */ +using T = Float64; +using D2Q9 = Descriptor<2u,9u>; + +using DfCell = Cell<T, D2Q9, 0u, 0u, 1u>; +using CellInfo = Cell<UInt8, D2Q9, 1u, 0u, 0u>; +using CellForceField = Cell<T, D2Q9, 0u, 1u, 0u>; + +/** + * Basic type for simulation + */ +using CellStruct = Struct< + Member<DfCell, "dfs">, + Member<DfCell, "dfs_old">, + Member<CellInfo, "info">, + Member<CellForceField, "force"> +>; + +using MacroStruct = Struct< + Member<FixedArray<Float64,D2Q9::D>, "velocity">, + Member<Float64, "pressure">, + Member<UInt8, "particle"> +>; + +} + +namespace cmpt { +template<bool East> +struct PressureBoundaryRestrictedVelocityTo {}; +} + +template<typename FP,typename Desc, bool East> +struct component<FP,Desc, cmpt::PressureBoundaryRestrictedVelocityTo<East>> { +private: + saw::data<FP> pressure_setting_; + saw::data<FP> rho_setting_; +public: + component(const saw::data<FP>& pressure_setting__): + pressure_setting_{pressure_setting__}, + rho_setting_{pressure_setting__ * df_info<FP,Desc>::inv_cs2} + {} + + template<typename CellFieldSchema> + void apply( + saw::data<CellFieldSchema>* field, + saw::data<sch::FixedArray<sch::UInt64,Desc::D>> index, + const saw::data<sch::FixedArray<sch::UInt64,Desc::D>>& meta, + uint64_t time_step + ) const { + + using dfi = df_info<FP,Desc>; + + auto flat_ind = flatten_index<sch::UInt64,Desc::D>::apply(index,meta); + + bool is_even = ((time_step % 2u) == 0u); + auto& cell = field[flat_ind.get()]; + + auto& info = cell.template get<"info">(); + if(info({0u}).get() == 0u){ + return; + } + auto& dfs_old = (is_even) ? cell.template get<"dfs_old">() : cell.template get<"dfs">(); + + /** + * Sum all known DFs + */ + saw::data<FP> sum_df{0u}; + for(saw::data<sch::UInt64> k{0u}; k < saw::data<sch::UInt64>{Desc::Q}; ++k){ + auto c_k = dfi::directions[k.get()]; + auto flat_ind_n = flatten_index<sch::UInt64,Desc::D>::apply({{index.at({0u})+c_k[0u], index.at({1u})+c_k[1u]}},meta); + auto& cell_n = field[flat_ind_n.get()]; + auto& info_n = cell_n.template get<"info">(); + auto info_n_val = info_n({0u}); + auto k_opp = dfi::opposite_index[k.get()]; + + if(info_n_val.get() > 0u){ + sum_df += dfs_old({k_opp}); + } + } + /** + * Get the sum of the unknown dfs and precalculate the direction + */ + constexpr int known_dir = East ? 1 : -1; + auto sum_unknown_dfs = (rho_setting_ - sum_df) * saw::data<FP>{known_dir}; + + for(saw::data<sch::UInt64> k{0u}; k < saw::data<sch::UInt64>{Desc::Q}; ++k){ + auto c_k = dfi::directions[k.get()]; + auto flat_ind_n = flatten_index<sch::UInt64,Desc::D>::apply({{index.at({0u})+c_k[0u], index.at({1u})+c_k[1u]}},meta); + auto& cell_n = field[flat_ind_n.get()]; + auto& info_n = cell_n.template get<"info">(); + auto info_n_val = info_n({0u}); + + if(info_n_val.get() > 0u){ + sum_unknown_dfs += dfs_old({k}) * c_k[0u]; + } + } + + auto vel_x = sum_unknown_dfs / rho_setting_; + + if constexpr (East) { + dfs_old({2u}) = dfs_old({1u}) + saw::data<FP>{2.0 / 3.0} * rho_setting_ * vel_x; + dfs_old({6u}) = dfs_old({5u}) + saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({4u}) - dfs_old({3u})); + dfs_old({8u}) = dfs_old({7u}) + saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({3u}) - dfs_old({4u})); + }else if constexpr (not East){ + dfs_old({1u}) = dfs_old({2u}) - saw::data<FP>{2.0 / 3.0} * rho_setting_ * vel_x; + dfs_old({5u}) = dfs_old({6u}) - saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({3u}) - dfs_old({4u})); + dfs_old({7u}) = dfs_old({8u}) - saw::data<FP>{1.0 / 6.0} * rho_setting_ * vel_x + saw::data<FP>{0.5} * (dfs_old({4u}) - dfs_old({3u})); + } + } +}; + +/** + * This is massively hacky and expects a lot of conditions + * Either this or mirrored along the horizontal line works + * + * 0 - 2 - 2 + * 0 - 3 - 1 + * 0 - 3 - 1 + * ......... + * 0 - 3 - 1 + * 0 - 2 - 2 + * + */ + +template<typename Desc> +saw::error_or<void> set_geometry( + saw::data<sch::CellStruct>* cells, + saw::data<sch::MacroStruct>* macro_cells, + const saw::data<sch::FixedArray<sch::UInt64,Desc::D>>& meta, + acpp::sycl::queue& sycl_q +){ + using namespace kel::lbm; + + saw::data<sch::T> rho{1.0}; + saw::data<sch::FixedArray<sch::T,Desc::D>> vel{{0.0,0.0}}; + auto eq = equilibrium<sch::T,Desc>(rho, vel); + + sycl_q.submit([&](acpp::sycl::handler& h){ + h.parallel_for(acpp::sycl::range<2>{meta.at({0}).get(), meta.at({1}).get()},[=](acpp::sycl::id<2> idx){ + size_t i = idx[0]; + size_t j = idx[1]; + size_t acc_id = j * meta.at({0u}).get() + i; + + auto& c = cells[acc_id]; + auto& info = c.template get<"info">()({0}); + auto& dfs = c.template get<"dfs">(); + auto& dfs_old = c.template get<"dfs_old">(); + + if(i >= 2u and j >= 2u and (i+2u) < meta.at({0u}).get() and (j+2u) < meta.at({1u}).get()){ + // Fluid + info.set({2u}); + }else if(((j+2u) == meta.at({1u}).get() or j == 1u) and (i>=1u and (i+1u)<meta.at({0u}).get() )){ + // Wall + info.set({1u}); + }else if((i==1u) and (j >= 1 and (j+1 < meta.at({1u}).get()) ) ){ + // Left input + info.set({3u}); + }else if((i+2u) == meta.at({0u}).get() and (j >= 1 and (j+1) < meta.at({1u}).get() )){ + // Right output + info.set({4u}); + }else { + info.set({0u}); + } + for(saw::data<sch::UInt64> k{0u}; k < saw::data<sch::UInt64>{Desc::Q}; ++k){ + dfs(k) = eq.at(k); + dfs_old(k) = eq.at(k); + } + }); + }).wait(); + + return saw::make_void(); +} + +template<typename Desc> +void step( + saw::data<sch::CellStruct>* cells, + saw::data<sch::MacroStruct>* macro_cells, + const saw::data<sch::FixedArray<sch::UInt64,Desc::D>>& meta, + uint64_t time_step, + acpp::sycl::queue& sycl_q +){ + using namespace kel::lbm; + using dfi = df_info<sch::T,Desc>; + + constexpr saw::data<sch::T> frequency{1.0 / 0.51}; + + bool is_even = ((time_step % 2u) == 0u); + /** + * 1. Relaxation parameter \tau + */ + /* + component<sch::T, sch::D2Q9, cmpt::BGK> coll{0.5384}; + component<sch::T, sch::D2Q9, cmpt::BounceBack> bb; + */ + component<sch::T, Desc, cmpt::PressureBoundaryRestrictedVelocityTo<true>> inlet{1.1 * dfi::cs2}; + component<sch::T, Desc, cmpt::PressureBoundaryRestrictedVelocityTo<false>> outlet{1.0 * dfi::cs2}; + + + // auto collision_ev = + sycl_q.submit([&](acpp::sycl::handler& h){ + + /// Collision + h.parallel_for(acpp::sycl::range<2>{meta.at({0}).get(), meta.at({1}).get()},[=](acpp::sycl::id<Desc::D> idx){ + size_t i = idx[0]; + size_t j = idx[1]; + size_t acc_id = j * meta.at({0u}).get() + i; + + auto& c = cells[acc_id]; + auto& info = cells[acc_id].template get<"info">(); + + switch (info({0u}).get()) { + // Bounce Back + case 1u: { + auto& dfs_old = is_even ? c.template get<"dfs_old">() : c.template get<"dfs">(); + auto df_cpy = dfs_old.copy(); + + for(uint64_t k = 1u; k < Desc::Q; ++k){ + dfs_old({k}) = df_cpy({dfi::opposite_index.at(k)}); + } + + break; + } + // Collision + case 2u: { + // coll.apply(latt_acc, {i, j}, time_step); + auto& dfs_old = is_even ? c.template get<"dfs_old">() : c.template get<"dfs">(); + + auto& macro_c = macro_cells[acc_id]; + + saw::data<sch::T>& rho = macro_c.template get<"pressure">(); + saw::data<sch::FixedArray<sch::T,Desc::D>>& vel = macro_c.template get<"velocity">(); + + compute_rho_u<sch::T,Desc>(dfs_old,rho,vel); + auto eq = equilibrium<sch::T,Desc>(rho,vel); + + for(uint64_t k = 0u; k < Desc::Q; ++k){ + dfs_old({k}) = dfs_old({k}) + frequency * (eq.at({k}) - dfs_old({k})); + } + break; + } + case 3u: { + inlet.apply(cells, {{i,j}}, meta, time_step); + break; + } + case 4u: { + outlet.apply(cells, {{i,j}}, meta, time_step); + break; + } + default: + // Do nothing + break; + } + }); + }).wait(); + + //auto stream_ev = + sycl_q.submit([&](acpp::sycl::handler& h){ + /// Stream + h.parallel_for(acpp::sycl::range<2>{meta.at({0}).get(), meta.at({1}).get()},[=](acpp::sycl::id<Desc::D> idx){ + size_t i = idx[0]; + size_t j = idx[1]; + size_t acc_id = j * meta.at({0u}).get() + i; + + auto& c = cells[acc_id]; + auto& info = c.template get<"info">(); + auto& dfs_new = is_even ? c.template get<"dfs">() : c.template get<"dfs_old">(); + + if (info({0u}).get() > 1u) { + for (uint64_t k = 0u; k < Desc::Q; ++k) { + auto dir = dfi::directions[dfi::opposite_index[k]]; + size_t acc_old_id = (j+dir[1]) * meta.at({0u}).get() + (i+dir[0]); + + auto& dfs_old = is_even ? cells[acc_old_id].template get<"dfs_old">() : cells[acc_old_id].template get<"dfs">(); + auto& info_old = cells[acc_old_id].template get<"info">(); + + dfs_new({k}) = dfs_old({k}); + } + } + + }); + }).wait(); +} +} +} + +template<typename T, typename Desc> +saw::error_or<void> kel_main(int argc, char** argv){ + using namespace kel; + + using dfi = lbm::df_info<T,Desc>; + + auto eo_lbm_dir = lbm::output_directory(); + if(eo_lbm_dir.is_error()){ + return std::move(eo_lbm_dir.get_error()); + } + auto& lbm_dir = eo_lbm_dir.get_value(); + auto out_dir = lbm_dir / "poiseulle_channel_2d_gpu"; + + // Create Dir TODO + + // + lbm::converter<lbm::sch::Float64> conv { + // delta_x + {{1.0}}, + // delta_t + {{1.0}} + }; + + uint64_t x_d = 256u; + uint64_t y_d = 64u; + + saw::data<lbm::sch::FixedArray<lbm::sch::UInt64,Desc::D>> meta{{x_d,y_d}}; + + acpp::sycl::queue sycl_q; + SyclHostAlloc<lbm::sch::MacroStruct> sycl_host_alloc{sycl_q}; + // SyclDeviceAlloc<lbm::sch::CellStruct> sycl_dev_alloc{sycl_q}; + + std::vector<saw::data<lbm::sch::MacroStruct>, SyclHostAlloc<lbm::sch::MacroStruct>> host_cells{x_d * y_d,sycl_host_alloc}; + + saw::data<lbm::sch::CellStruct>* cells = acpp::sycl::malloc_device<saw::data<lbm::sch::CellStruct>>(x_d * y_d,sycl_q); + saw::data<lbm::sch::MacroStruct>* macro_cells = acpp::sycl::malloc_device<saw::data<lbm::sch::MacroStruct>>(x_d * y_d,sycl_q); + { + auto eov = lbm::set_geometry<Desc>(cells,macro_cells + ,meta,sycl_q); + if(eov.is_error()){ + return eov; + } + } + + uint64_t time_max_step = 1024u*128u; + + for(uint64_t i = 0u; i < time_max_step; ++i){ + lbm::step<Desc>(cells,macro_cells,meta,i,sycl_q); + sycl_q.wait(); + if(i%1u == 4u){ + std::string vtk_f_name{"tmp/poiseulle_2d_gpu_"}; + vtk_f_name += std::to_string(i) + ".vtk"; + // write_vtk_file(vtk_f_name,host_cells); + sycl_q.memcpy(&host_cells[0u], macro_cells, x_d * y_d * sizeof(saw::data<lbm::sch::MacroStruct>) ).wait(); + lbm::write_vtk_file<lbm::sch::MacroStruct,Desc::D>(vtk_f_name, &host_cells[0], meta); + } + } + + sycl_q.wait(); + acpp::sycl::free(cells, sycl_q); + acpp::sycl::free(macro_cells, sycl_q); + sycl_q.wait(); + + return saw::make_void(); +} + +int main(int argc, char** argv){ + auto eov = kel_main<kel::lbm::sch::T,kel::lbm::sch::D2Q9>(argc, argv); + if(eov.is_error()){ + auto& err = eov.get_error(); + std::cerr<<"[Error] "<<err.get_category(); + auto err_msg = err.get_message(); + if(err_msg.size() > 0u){ + std::cerr<<" - "<<err_msg; + } + std::cerr<<std::endl; + return err.get_id(); + } + return 0; +} |