Rename folder, add basic README.md

5 files changed, 0 insertions, 291 deletions

diff --git a/ldc_2d/cpp/CMakeLists.txt b/ldc_2d/cpp/CMakeLists.txt
deleted file mode 100644
index 5b5fb90..0000000
--- a/ldc_2d/cpp/CMakeLists.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-cmake_minimum_required(VERSION 3.10)
-project(ldc LANGUAGES CXX)
-
-if(NOT CMAKE_BUILD_TYPE)
-  set(CMAKE_BUILD_TYPE Release)
-endif()
-
-set(CMAKE_CXX_FLAGS_RELEASE "-O3")
-
-add_custom_command(
-	OUTPUT
-		kernel.h
-		ldc.cpp
-	COMMAND
-		${CMAKE_CURRENT_SOURCE_DIR}/generate.py --output ${CMAKE_CURRENT_BINARY_DIR}
-	WORKING_DIRECTORY
-		${CMAKE_CURRENT_SOURCE_DIR}
-	DEPENDS
-		generate.py config.py ldc.cpp.mako
-)
-
-include_directories(
-	${CMAKE_BINARY_DIR}
-)
-
-add_executable(
-	ldc
-		${CMAKE_CURRENT_BINARY_DIR}/ldc.cpp
-)
-
-target_compile_features(
-	ldc
-	PUBLIC
-		cxx_std_17
-)
-
-find_package(OpenMP)
-if(OpenMP_CXX_FOUND)
-	target_link_libraries(
-		ldc
-		PUBLIC
-			OpenMP::OpenMP_CXX
-	)
-endif()
diff --git a/ldc_2d/cpp/README.md b/ldc_2d/cpp/README.md
deleted file mode 100644
index 8e84c83..0000000
--- a/ldc_2d/cpp/README.md
+++ /dev/null
@@ -1,18 +0,0 @@
-# Lid driven cavity
-
-This example models the common lid driven cavity example.
-Note that the actual optimized C++ implementation is generated using the _boltzgen_ library.
-
-See `config.py` for various configuration options. Both 2D and 3D are supported.
-
-## Build instructions
-
-```
-mkdir build
-cd build
-cmake ..
-make
-./ldc
-```
-
-This should result in some summarizing CLI output in addition to a `test.vtk` file for visualization in Paraview.
diff --git a/ldc_2d/cpp/config.py b/ldc_2d/cpp/config.py
deleted file mode 100644
index 3ed8bd5..0000000
--- a/ldc_2d/cpp/config.py
+++ /dev/null
@@ -1,13 +0,0 @@
-from boltzgen.lbm.model import *
-from boltzgen import Geometry
-
-descriptor = D2Q9
-geometry   = Geometry(512, 512)
-tau        = 0.52
-precision  = 'single'
-
-## 3D LDC
-#descriptor = D3Q19
-#geometry   = Geometry(64, 64, 64)
-#tau        = 0.52
-#precision  = 'single'
diff --git a/ldc_2d/cpp/generate.py b/ldc_2d/cpp/generate.py
deleted file mode 100755
index 4222e98..0000000
--- a/ldc_2d/cpp/generate.py
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/usr/bin/env python
-
-import argparse
-
-from boltzgen import LBM, Generator, Geometry
-from boltzgen.lbm.model import D2Q9
-
-import config
-
-argparser = argparse.ArgumentParser(
-    description = 'Generate a C++ implementation of a lid driven cavity simulation using LBM')
-argparser.add_argument(
-    '--output', required = False, help = 'Target directory for the generated sources')
-
-args = argparser.parse_args()
-
-lbm = LBM(config.descriptor)
-generator = Generator(
-    descriptor = config.descriptor,
-    moments    = lbm.moments(),
-    collision  = lbm.bgk(f_eq = lbm.equilibrium(), tau = config.tau),
-    target     = 'cpp',
-    precision  = config.precision,
-    index      = 'XYZ',
-    layout     = 'AOS')
-
-if args.output is None:
-    args.output = '.'
-
-functions = ['collide_and_stream', 'equilibrilize', 'collect_moments', 'momenta_boundary']
-
-with open('%s/kernel.h' % args.output, 'w') as kernel:
-    kernel.write(generator.kernel(config.geometry, functions))
-
-ldc_src = ''
-with open('ldc.cpp.mako', 'r') as template:
-    ldc_src = template.read()
-
-with open('%s/ldc.cpp' % args.output, 'w') as app:
-    app.write(generator.custom(config.geometry, ldc_src))
diff --git a/ldc_2d/cpp/ldc.cpp.mako b/ldc_2d/cpp/ldc.cpp.mako
deleted file mode 100644
index 5d480de..0000000
--- a/ldc_2d/cpp/ldc.cpp.mako
+++ /dev/null
@@ -1,176 +0,0 @@
-#include <cstdint>
-#include <memory>
-#include <vector>
-#include <chrono>
-#include <iostream>
-#include <fstream>
-
-#include "kernel.h"
-
-void collect_moments_to_vtk(const std::string& path, ${float_type}* f) {
-    std::ofstream fout;
-    fout.open(path.c_str());
-
-    fout << "# vtk DataFile Version 3.0\n";
-    fout << "lbm_output\n";
-    fout << "ASCII\n";
-    fout << "DATASET RECTILINEAR_GRID\n";
-% if descriptor.d == 2:
-    fout << "DIMENSIONS " << ${geometry.size_x-2} << " " << ${geometry.size_y-2} << " 1" << "\n";
-% else:
-    fout << "DIMENSIONS " << ${geometry.size_x-2} << " " << ${geometry.size_y-2} << " " << ${geometry.size_z-2} << "\n";
-% endif
-
-    fout << "X_COORDINATES " << ${geometry.size_x-2} << " float\n";
-    for( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-        fout << x << " ";
-    }
-
-    fout << "\nY_COORDINATES " << ${geometry.size_y-2} << " float\n";
-    for( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-        fout << y << " ";
-    }
-
-% if descriptor.d == 2:
-    fout << "\nZ_COORDINATES " << 1 << " float\n";
-    fout << 0 << "\n";
-    fout << "POINT_DATA " << ${(geometry.size_x-2) * (geometry.size_y-2)} << "\n";
-% else:
-    fout << "\nZ_COORDINATES " << ${geometry.size_z-2} << " float\n";
-    for( std::size_t z = 1; z < ${geometry.size_z-1}; ++z ) {
-        fout << z << " ";
-    }
-    fout << "\nPOINT_DATA " << ${(geometry.size_x-2) * (geometry.size_y-2) * (geometry.size_z-2)} << "\n";
-% endif
-
-    ${float_type} rho;
-    ${float_type} u[${descriptor.d}];
-
-    fout << "VECTORS velocity float\n";
-% if descriptor.d == 2:
-    for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-        for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-            collect_moments(f, x*${geometry.size_y}+y, rho, u);
-            fout << u[0] << " " << u[1] << " 0\n";
-        }
-    }
-% else:
-    for ( std::size_t z = 1; z < ${geometry.size_z-1}; ++z ) {
-        for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-            for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-                collect_moments(f, x*${geometry.size_y*geometry.size_z}+y*${geometry.size_z}+z, rho, u);
-                fout << u[0] << " " << u[1] << " " << u[2] << "\n";
-            }
-        }
-    }
-% endif
-
-    fout << "SCALARS density float 1\n";
-    fout << "LOOKUP_TABLE default\n";
-% if descriptor.d == 2:
-    for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-        for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-            collect_moments(f, x*${geometry.size_y}+y, rho, u);
-            fout << rho << "\n";
-        }
-    }
-% else:
-    for ( std::size_t z = 1; z < ${geometry.size_z-1}; ++z ) {
-        for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-            for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-                collect_moments(f, x*${geometry.size_y*geometry.size_z}+y*${geometry.size_z}+z, rho, u);
-                fout << rho << "\n";
-            }
-        }
-    }
-% endif
-
-    fout.close();
-}
-
-void simulate(std::size_t nStep)
-{
-    auto f_a = std::make_unique<${float_type}[]>(${geometry.volume*descriptor.q});
-    auto f_b = std::make_unique<${float_type}[]>(${geometry.volume*descriptor.q});
-
-    ${float_type}* f_prev = f_a.get();
-    ${float_type}* f_next = f_b.get();
-
-    std::vector<std::size_t> bulk;
-    std::vector<std::size_t> lid_bc;
-    std::vector<std::size_t> box_bc;
-
-    for (int iX = 1; iX < ${geometry.size_x-1}; ++iX) {
-        for (int iY = 1; iY < ${geometry.size_y-1}; ++iY) {
-% if descriptor.d == 2:
-            const std::size_t iCell = iX*${geometry.size_y} + iY;
-            if (iY == ${geometry.size_y-2}) {
-                lid_bc.emplace_back(iCell);
-            } else if (iX == 1 || iX == ${geometry.size_x-2} || iY == 1) {
-                box_bc.emplace_back(iCell);
-            } else {
-                bulk.emplace_back(iCell);
-            }
-% elif descriptor.d == 3:
-            for (int iZ = 0; iZ < ${geometry.size_z}; ++iZ) {
-                const std::size_t iCell = iX*${geometry.size_y*geometry.size_z} + iY*${geometry.size_z} + iZ;
-                if (iZ == ${geometry.size_z-2}) {
-                    lid_bc.emplace_back(iCell);
-                } else if (iX == 1 || iX == ${geometry.size_x-2} || iY == 1 || iY == ${geometry.size_y-2} || iZ == 1) {
-                    box_bc.emplace_back(iCell);
-                } else {
-                    bulk.emplace_back(iCell);
-                }
-            }
-% endif
-        }
-    }
-
-    std::cout << "#bulk   : " << bulk.size()   << std::endl;
-    std::cout << "#lid    : " << lid_bc.size() << std::endl;
-    std::cout << "#wall   : " << box_bc.size() << std::endl;
-    std::cout << "#steps  : " << nStep         << std::endl;
-    std::cout << std::endl;
-
-    for (std::size_t iCell = 0; iCell < ${geometry.volume}; ++iCell) {
-        equilibrilize(f_prev, f_next, iCell);
-    }
-
-    const auto start = std::chrono::high_resolution_clock::now();
-
-    for (std::size_t iStep = 0; iStep < nStep; ++iStep) {
-        if (iStep % 2 == 0) {
-            f_next = f_a.get();
-            f_prev = f_b.get();
-        } else {
-            f_next = f_b.get();
-            f_prev = f_a.get();
-        }
-
-#pragma omp parallel for
-        for (std::size_t i = 0; i < bulk.size(); ++i) {
-            collide_and_stream(f_next, f_prev, bulk[i]);
-        }
-        ${float_type} u[${descriptor.d}] { 0. };
-#pragma omp parallel for
-        for (std::size_t i = 0; i < box_bc.size(); ++i) {
-            velocity_momenta_boundary(f_next, f_prev, box_bc[i], u);
-        }
-        u[0] = 0.05;
-#pragma omp parallel for
-        for (std::size_t i = 0; i < lid_bc.size(); ++i) {
-            velocity_momenta_boundary(f_next, f_prev, lid_bc[i], u);
-        }
-    }
-
-    auto duration = std::chrono::duration_cast<std::chrono::duration<double>>(
-        std::chrono::high_resolution_clock::now() - start);
-
-    std::cout << "MLUPS   : " << nStep*${geometry.volume}/(1e6*duration.count()) << std::endl;
-
-    collect_moments_to_vtk("test.vtk", f_next);
-}
-
-int main() {
-    simulate(10000);
-}