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authorClaudius "keldu" Holeksa <mail@keldu.de>2026-03-06 21:05:36 +0100
committerClaudius "keldu" Holeksa <mail@keldu.de>2026-03-06 21:05:36 +0100
commit25c85bf962e0646f8e03f67fd4982450f41ee6a6 (patch)
tree1310dca3d2a9e372ead13d166a57db8cfcbbfe84 /examples/poiseulle_particles_2d_psm_gpu
parent507440cdf786f7a1a83bdf22371f1844910382fb (diff)
downloadlibs-lbm-25c85bf962e0646f8e03f67fd4982450f41ee6a6.tar.gz
Work finished for this weekdev
Diffstat (limited to 'examples/poiseulle_particles_2d_psm_gpu')
-rw-r--r--examples/poiseulle_particles_2d_psm_gpu/.nix/derivation.nix41
-rw-r--r--examples/poiseulle_particles_2d_psm_gpu/SConscript34
-rw-r--r--examples/poiseulle_particles_2d_psm_gpu/SConstruct81
-rw-r--r--examples/poiseulle_particles_2d_psm_gpu/sim.cpp471
4 files changed, 627 insertions, 0 deletions
diff --git a/examples/poiseulle_particles_2d_psm_gpu/.nix/derivation.nix b/examples/poiseulle_particles_2d_psm_gpu/.nix/derivation.nix
new file mode 100644
index 0000000..517b6b8
--- /dev/null
+++ b/examples/poiseulle_particles_2d_psm_gpu/.nix/derivation.nix
@@ -0,0 +1,41 @@
+{ lib
+, stdenv
+, scons
+, clang-tools
+, forstio
+, python3
+, pname
+, version
+, adaptive-cpp
+, kel
+}:
+
+stdenv.mkDerivation {
+ pname = pname + "-examples-" + "poiseulle_2d_gpu";
+ inherit version;
+ src = ./..;
+
+ nativeBuildInputs = [
+ scons
+ clang-tools
+ python3
+ ];
+
+ buildInputs = [
+ forstio.core
+ forstio.async
+ forstio.codec
+ forstio.codec-unit
+ forstio.io
+ forstio.remote
+ forstio.remote-filesystem
+ forstio.codec-json
+ adaptive-cpp
+ kel.lbm.core
+ kel.lbm.sycl
+ ];
+
+ preferLocalBuild = true;
+
+ outputs = [ "out" "dev" ];
+}
diff --git a/examples/poiseulle_particles_2d_psm_gpu/SConscript b/examples/poiseulle_particles_2d_psm_gpu/SConscript
new file mode 100644
index 0000000..eb856b6
--- /dev/null
+++ b/examples/poiseulle_particles_2d_psm_gpu/SConscript
@@ -0,0 +1,34 @@
+#!/bin/false
+
+import os
+import os.path
+import glob
+
+
+Import('env')
+
+dir_path = Dir('.').abspath
+
+# Environment for base library
+examples_env = env.Clone();
+examples_env['CXX'] = 'syclcc-clang';
+examples_env['CXXFLAGS'] += ['-O3'];
+
+examples_env.sources = sorted(glob.glob(dir_path + "/*.cpp"))
+examples_env.headers = sorted(glob.glob(dir_path + "/*.hpp"))
+
+env.sources += examples_env.sources;
+env.headers += examples_env.headers;
+
+# Cavity2D
+examples_objects = [];
+examples_env.add_source_files(examples_objects, ['sim.cpp'], shared=False);
+examples_env.poiseulle_2d_gpu = examples_env.Program('#bin/poiseulle_particles_2d_psm_gpu', [examples_objects]);
+
+# Set Alias
+env.examples = [
+ examples_env.poiseulle_2d_gpu
+];
+env.Alias('examples', env.examples);
+env.targets += ['examples'];
+env.Install('$prefix/bin/', env.examples);
diff --git a/examples/poiseulle_particles_2d_psm_gpu/SConstruct b/examples/poiseulle_particles_2d_psm_gpu/SConstruct
new file mode 100644
index 0000000..0611b67
--- /dev/null
+++ b/examples/poiseulle_particles_2d_psm_gpu/SConstruct
@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import os.path
+import glob
+import re
+
+
+if sys.version_info < (3,):
+ def isbasestring(s):
+ return isinstance(s,basestring)
+else:
+ def isbasestring(s):
+ return isinstance(s, (str,bytes))
+
+def add_kel_source_files(self, sources, filetype, lib_env=None, shared=False, target_post=""):
+
+ if isbasestring(filetype):
+ dir_path = self.Dir('.').abspath
+ filetype = sorted(glob.glob(dir_path+"/"+filetype))
+
+ for path in filetype:
+ target_name = re.sub( r'(.*?)(\.cpp|\.c\+\+)', r'\1' + target_post, path )
+ if shared:
+ target_name+='.os'
+ sources.append( self.SharedObject( target=target_name, source=path ) )
+ else:
+ target_name+='.o'
+ sources.append( self.StaticObject( target=target_name, source=path ) )
+ pass
+
+def isAbsolutePath(key, dirname, env):
+ assert os.path.isabs(dirname), "%r must have absolute path syntax" % (key,)
+
+env_vars = Variables(
+ args=ARGUMENTS
+)
+
+env_vars.Add('prefix',
+ help='Installation target location of build results and headers',
+ default='/usr/local/',
+ validator=isAbsolutePath
+)
+
+env_vars.Add('build_examples',
+ help='If examples should be built',
+ default="true"
+)
+
+env=Environment(ENV=os.environ, variables=env_vars, CPPPATH=[],
+ CPPDEFINES=['SAW_UNIX'],
+ CXXFLAGS=[
+ '-std=c++20',
+ '-g',
+ '-Wall',
+ '-Wextra'
+ ],
+ LIBS=[
+ 'forstio-core',
+ 'forstio-async',
+ 'forstio-io'
+ ]
+);
+env.__class__.add_source_files = add_kel_source_files
+env.Tool('compilation_db');
+env.cdb = env.CompilationDatabase('compile_commands.json');
+
+env.objects = [];
+env.sources = [];
+env.headers = [];
+env.targets = [];
+
+Export('env')
+SConscript('SConscript')
+
+env.Alias('cdb', env.cdb);
+env.Alias('all', [env.targets]);
+env.Default('all');
+
+env.Alias('install', '$prefix')
diff --git a/examples/poiseulle_particles_2d_psm_gpu/sim.cpp b/examples/poiseulle_particles_2d_psm_gpu/sim.cpp
new file mode 100644
index 0000000..cf68d24
--- /dev/null
+++ b/examples/poiseulle_particles_2d_psm_gpu/sim.cpp
@@ -0,0 +1,471 @@
+#include <kel/lbm/sycl/lbm.hpp>
+#include <kel/lbm/lbm.hpp>
+#include <kel/lbm/particle.hpp>
+
+#include <forstio/io/io.hpp>
+#include <forstio/remote/filesystem/easy.hpp>
+#include <forstio/codec/json/json.hpp>
+#include <forstio/codec/simple.hpp>
+
+namespace kel {
+namespace lbm {
+
+constexpr uint64_t dim_y = 256ul;
+constexpr uint64_t dim_x = dim_y * 20ul;
+
+constexpr uint64_t particle_amount = 1ul;
+
+namespace sch {
+using namespace saw::schema;
+
+using InfoChunk = Chunk<UInt8, 0u, dim_x, dim_y>;
+
+template<typename T, typename Desc>
+using DfChunk = Chunk<FixedArray<T,Desc::Q>, 1u, dim_x, dim_y>;
+
+template<typename T, typename Desc>
+using ScalarChunk = Chunk<Scalar<T>, 0u, dim_x, dim_y>;
+
+template<typename T, typename Desc>
+using VectorChunk = Chunk<Vector<T,Desc::D>, 0u, dim_x, dim_y>;
+
+template<typename T, typename Desc>
+using ChunkStruct = Struct<
+ Member<InfoChunk, "info">,
+ Member<DfChunk<T,Desc>, "dfs">,
+ Member<DfChunk<T,Desc>, "dfs_old">,
+ Member<VectorChunk<T,Desc>, "particle_N">,
+ Member<ScalarChunk<T,Desc>, "particle_D">
+>;
+
+template<typename T, typename Desc>
+using VelChunk = Chunk<Vector<T,Desc::D>, 0u, dim_x, dim_y>;
+
+template<typename T>
+using RhoChunk = Chunk<Scalar<T>, 0u, dim_x, dim_y>;
+
+template<typename T, typename Desc>
+using MacroStruct = Struct<
+ Member<VelChunk<T,Desc>, "velocity">,
+ Member<RhoChunk<T>, "density">,
+ Member<ScalarChunk<T,Desc>, "porosity">
+>;
+
+//template<typename T, typename Desc>
+//using ParticleArray = Array<
+// Particle<T,Desc::D>
+//>;
+}
+
+template<typename T, typename Desc>
+saw::error_or<void> setup_initial_conditions(
+ saw::data<sch::ChunkStruct<T,Desc>>& fields,
+ saw::data<sch::MacroStruct<T,Desc>>& macros,
+ saw::data<sch::FixedArray<sch::Particle<T,Desc::D>, particle_amount>>& particles
+){
+ auto& info_f = fields.template get<"info">();
+ auto& porous_f = macros.template get<"porosity">();
+ // Set everything as walls
+ iterator<Desc::D>::apply(
+ [&](auto& index){
+ info_f.at(index).set(1u);
+ },
+ {},
+ info_f.get_dims(),
+ {}
+ );
+ // Fluid
+ iterator<Desc::D>::apply(
+ [&](auto& index){
+ info_f.at(index).set(2u);
+ },
+ {},
+ info_f.get_dims(),
+ {{1u,1u}}
+ );
+
+ // Inflow
+ iterator<Desc::D>::apply(
+ [&](auto& index){
+ info_f.at(index).set(3u);
+ },
+ {{0u,0u}},
+ {{1u,dim_y}},
+ {{0u,1u}}
+ );
+
+ // Outflow
+ iterator<Desc::D>::apply(
+ [&](auto& index){
+ info_f.at(index).set(4u);
+ },
+ {{dim_x-1u,0u}},
+ {{dim_x, dim_y}},
+ {{0u,1u}}
+ );
+ //
+ auto& df_f = fields.template get<"dfs_old">();
+ auto& rho_f = macros.template get<"density">();
+ auto& vel_f = macros.template get<"velocity">();
+ auto& por_f = macros.template get<"porosity">();
+
+ iterator<Desc::D>::apply(
+ [&](auto& index){
+ auto& df = df_f.at(index);
+ auto& rho = rho_f.at(index);
+ por_f.at(index).at({}) = {1};
+ rho.at({}) = {1};
+ auto& vel = vel_f.at(index);
+ auto eq = equilibrium<T,Desc>(rho,vel);
+
+ df = eq;
+ },
+ {},// 0-index
+ df_f.get_dims()
+ );
+
+ iterator<Desc::D>::apply(
+ [&](auto& index){
+ auto& df = df_f.at(index);
+ auto& rho = rho_f.at(index);
+ rho.at({}) = {1};
+ auto& vel = vel_f.at(index);
+ if(info_f.at(index).get() == 2u){
+ vel.at({{0u}}) = 0.0;
+ }
+ auto eq = equilibrium<T,Desc>(rho,vel);
+
+ df = eq;
+ },
+ {},// 0-index
+ df_f.get_dims(),
+ {{1u,1u}}
+ );
+
+ iterator<Desc::D>::apply(
+ [&](auto& index){
+ saw::data<sch::Vector<T,Desc::D>> middle, ind_vec;
+ middle.at({{0u}}) = dim_x * 0.25;
+ middle.at({{1u}}) = dim_y * 0.5;
+
+ ind_vec.at({{0u}}) = index.at({{0u}}).template cast_to<T>();
+ ind_vec.at({{1u}}) = index.at({{1u}}).template cast_to<T>();
+
+ auto dist = middle - ind_vec;
+ auto dist_2 = saw::math::dot(dist,dist);
+ if(dist_2.at({}).get() < dim_y*dim_y*0.01){
+ porous_f.at(index).at({}) = 0.0;
+ }
+ },
+ {},// 0-index
+ df_f.get_dims()
+ );
+
+ for(saw::data<sch::UInt64> i{0u}; i < saw::data<sch::UInt64>{particle_amount}; ++i){
+ auto& part = particles.at(i);
+
+ saw::data<sch::Vector<T,Desc::D>> pos;
+ pos.at({{0u}}) = dim_x * 0.25;
+ pos.at({{1u}}) = dim_y * 0.5;
+ saw::data<sch::Scalar<T>> rad, dense, dt;
+ rad.at({}) = dim_y * 0.1;
+ dense.at({}) = 1.0;
+ dt.at({}) = 1.0;
+ part = create_spheroid_particle(
+ pos,{},{},
+ {},{},{},
+ rad, dense,dt
+ );
+ }
+
+ return saw::make_void();
+}
+
+template<typename T, typename Desc>
+saw::error_or<void> step(
+ saw::data<sch::Ptr<sch::ChunkStruct<T,Desc>>,encode::Sycl<saw::encode::Native>>& fields,
+ saw::data<sch::Ptr<sch::MacroStruct<T,Desc>>,encode::Sycl<saw::encode::Native>>& macros,
+ saw::data<sch::FixedArray<sch::Particle<T,Desc::D>, particle_amount>>& particles,
+ saw::data<sch::UInt64> t_i,
+ device& dev
+){
+ auto& q = dev.get_handle();
+ auto& info_f = fields.template get<"info">();
+ auto& porous_f = macros.template get<"porosity">();
+
+ {
+ auto& p = particles.at({{0u}});
+
+ auto& p_coll = p.template get<"collision">();
+ auto& p_rad = p_coll.template get<"radius">();
+ }
+
+
+ // auto coll_ev =
+ q.submit([&](acpp::sycl::handler& h){
+ // Need nicer things to handle the flow. I see improvement here
+ //component<T,Desc,cmpt::BGK, encode::Sycl<saw::encode::Native>> collision{0.65};
+ // component<T,Desc,cmpt::HLBM,encode::Sycl<saw::encode::Native>> collision{0.65};
+ component<T,Desc,cmpt::PSM,encode::Sycl<saw::encode::Native>> collision{0.65};
+ component<T,Desc,cmpt::BounceBack,encode::Sycl<saw::encode::Native>> bb;
+
+ saw::data<sch::Scalar<T>> rho_b;
+ rho_b.at({}) = 1.0;
+ saw::data<sch::Vector<T,Desc::D>> vel_b;
+ vel_b.at({{0u}}) = 0.015;
+
+ component<T,Desc,cmpt::Equilibrium,encode::Sycl<saw::encode::Native>> equi{rho_b,vel_b};
+
+ component<T,Desc,cmpt::ZouHeHorizontal<true>,encode::Sycl<saw::encode::Native>> flow_in{
+ [&](){
+ uint64_t target_t_i = 64u;
+ if(t_i.get() < target_t_i){
+ return 1.0 + (0.0015 / target_t_i) * t_i.get();
+ }
+ return 1.0015;
+ }()
+ };
+ component<T,Desc,cmpt::ZouHeHorizontal<false>,encode::Sycl<saw::encode::Native>> flow_out{1.0};
+
+
+ h.parallel_for(acpp::sycl::range<Desc::D>{dim_x,dim_y}, [=](acpp::sycl::id<Desc::D> idx){
+ saw::data<sch::FixedArray<sch::UInt64,Desc::D>> index;
+ for(uint64_t i = 0u; i < Desc::D; ++i){
+ index.at({{i}}).set(idx[i]);
+ }
+
+ auto info = info_f.at(index);
+
+ switch(info.get()){
+ case 0u:
+ break;
+ case 1u:
+ bb.apply(fields,index,t_i);
+ break;
+ case 2u:
+ collision.apply(fields,macros,index,t_i);
+ break;
+ case 3u:
+ //flow_in.apply(fields,index,t_i);
+ equi.apply(fields,index,t_i);
+ collision.apply(fields,macros,index,t_i);
+ break;
+ case 4u:
+ // flow_out.apply(fields,index,t_i);
+ equi.apply(fields,index,t_i);
+ collision.apply(fields,macros,index,t_i);
+ break;
+ default:
+ break;
+ }
+ });
+ }).wait();
+
+
+ // Step
+ /*
+ q.submit([&](acpp::sycl::handler& h){
+ // h.depends_on(collision_ev);
+ }).wait();
+ */
+
+ return saw::make_void();
+}
+}
+}
+
+template<typename T, typename Desc>
+saw::error_or<void> lbm_main(int argc, char** argv){
+ using namespace kel::lbm;
+
+ using dfi = df_info<T,Desc>;
+
+ auto eo_lbm_dir = 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_particles_2d_gpu";
+
+ {
+ std::error_code ec;
+ std::filesystem::create_directories(out_dir,ec);
+ if(ec != std::errc{}){
+ return saw::make_error<saw::err::critical>("Could not create output directory");
+ }
+ }
+
+ converter<T> conv {
+ // delta_x
+ {{1.0}},
+ // delta_t
+ {{1.0}}
+ };
+
+ print_lbm_meta<T,Desc>(conv,{0.05},{0.01},{0.4 * dim_y});
+
+ // saw::data<sch::FixedArray<sch::UInt64,Desc::D>> meta{{dim_x,dim_y}};
+ auto lbm_data_ptr = saw::heap<saw::data<sch::ChunkStruct<T,Desc>>>();
+ auto lbm_macro_data_ptr = saw::heap<saw::data<sch::MacroStruct<T,Desc>>>();
+ auto lbm_particle_data_ptr = saw::heap<saw::data<sch::FixedArray<sch::Particle<T,Desc::D>, particle_amount>>>();
+
+ std::cout<<"Estimated Bytes: "<<memory_estimate<sch::ChunkStruct<T,Desc>,sch::MacroStruct<T,Desc>>().get()<<std::endl;
+
+ auto eo_aio = saw::setup_async_io();
+ if(eo_aio.is_error()){
+ return std::move(eo_aio.get_error());
+ }
+ auto& aio = eo_aio.get_value();
+ saw::wait_scope wait{aio.event_loop};
+
+ bool krun = true;
+ bool print_status = false;
+ aio.event_port.on_signal(saw::Signal::Terminate).then([&](){
+ krun = false;
+ }).detach();
+ aio.event_port.on_signal(saw::Signal::User1).then([&](){
+ print_status = true;
+ }).detach();
+
+ device dev;
+
+ auto& sycl_q = dev.get_handle();
+
+ sycl_q.wait();
+ {
+ auto eov = setup_initial_conditions<T,Desc>(*lbm_data_ptr,*lbm_macro_data_ptr,*lbm_particle_data_ptr);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ {
+ auto eov = write_vtk_file(out_dir,"initial_state",0u,*lbm_data_ptr);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+
+ saw::data<sch::ChunkStruct<T,Desc>, encode::Sycl<saw::encode::Native>> lbm_sycl_data{sycl_q};
+ saw::data<sch::MacroStruct<T,Desc>, encode::Sycl<saw::encode::Native>> lbm_sycl_macro_data{sycl_q};
+ saw::data<sch::FixedArray<sch::Particle<T,Desc::D>, particle_amount>, encode::Sycl<saw::encode::Native>> lbm_sycl_particle_data{sycl_q};
+ sycl_q.wait();
+
+ auto lsd_view = make_chunk_struct_view(lbm_sycl_data);
+ auto lsdm_view = make_chunk_struct_view(lbm_sycl_macro_data);
+ {
+ auto eov = dev.copy_to_device(*lbm_data_ptr,lbm_sycl_data);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ {
+ auto eov = dev.copy_to_device(*lbm_macro_data_ptr,lbm_sycl_macro_data);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ {
+ auto eov = dev.copy_to_device(*lbm_particle_data_ptr,lbm_sycl_particle_data);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ sycl_q.wait();
+ saw::data<sch::UInt64> time_steps{16u*4096ul};
+
+ auto& info_f = lsd_view.template get<"info">();
+
+ for(saw::data<sch::UInt64> i{0u}; i < time_steps and krun; ++i){
+ // BC + Collision
+ {
+ auto eov = step<T,Desc>(lsd_view,lsdm_view,*lbm_particle_data_ptr,i,dev);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ sycl_q.wait();
+ {
+ {
+ auto eov = dev.copy_to_host(lbm_sycl_macro_data,*lbm_macro_data_ptr);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ {
+ auto eov = write_vtk_file(out_dir,"m",i.get(), *lbm_macro_data_ptr);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ }
+ /*
+ {
+ {
+ auto eov = dev.copy_to_host(lbm_sycl_data,*lbm_data_ptr);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ {
+ auto eov = write_csv_file(out_dir,"lbm",i.get(), *lbm_data_ptr);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+ }
+ */
+ // Stream
+ sycl_q.submit([&](acpp::sycl::handler& h){
+ component<T,Desc,cmpt::Stream,encode::Sycl<saw::encode::Native>> stream;
+
+ h.parallel_for(acpp::sycl::range<Desc::D>{dim_x,dim_y}, [=](acpp::sycl::id<Desc::D> idx){
+ saw::data<sch::FixedArray<sch::UInt64,Desc::D>> index;
+ for(uint64_t i = 0u; i < Desc::D; ++i){
+ index.at({{i}}).set(idx[i]);
+ }
+
+ auto info = info_f.at(index);
+
+ if(info.get() > 0u){
+ stream.apply(lsd_view,index,i);
+ }
+ });
+ }).wait();
+ wait.poll();
+ if(print_status){
+ std::cout<<"Status: "<<i.get()<<" of "<<time_steps.get()<<" - "<<(i.template cast_to<sch::Float64>().get() * 100 / time_steps.get())<<"%"<<std::endl;
+ print_status = false;
+ }
+ print_progress_bar(i.get(), time_steps.get()-1u);
+ }
+
+ // After Loop
+ sycl_q.wait();
+ {
+ auto eov = write_vtk_file(out_dir,"m",time_steps.get(), *lbm_macro_data_ptr);
+ if(eov.is_error()){
+ return eov;
+ }
+ }
+
+ sycl_q.wait();
+ return saw::make_void();
+}
+
+using FloatT = kel::lbm::sch::Float32;
+
+int main(int argc, char** argv){
+ auto eov = lbm_main<FloatT,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;
+}