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authorAdrian Kummerlaender2019-10-30 16:12:20 +0100
committerAdrian Kummerlaender2019-10-30 16:12:20 +0100
commitc82b38122cc3ab7717cb0ba9ec530b4658bd03e4 (patch)
tree128838b39fa1dd1cd0cf6b6014824730021f2fff
parent09f45c1d1da37bf4f6fa4094eb2d2ea18e8aaf21 (diff)
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Move C++ example to boltzgen_examples repository
-rw-r--r--README.md3
-rw-r--r--boltzgen/kernel/template/example.cpp.mako172
2 files changed, 1 insertions, 174 deletions
diff --git a/README.md b/README.md
index 9a7052b..df22b58 100644
--- a/README.md
+++ b/README.md
@@ -54,8 +54,7 @@ optional arguments:
\ --layout AOS
\ --precision double
\ --tau 0.52
-\ --functions default bounce_back_boundary example
-\ --extras omp_parallel_for moments_vtk | tee kernel.h
+\ --functions default bounce_back_boundary | tee kernel.h
void collide_and_stream( double* f_next,
const double* f_prev,
std::size_t gid)
diff --git a/boltzgen/kernel/template/example.cpp.mako b/boltzgen/kernel/template/example.cpp.mako
deleted file mode 100644
index d979bfd..0000000
--- a/boltzgen/kernel/template/example.cpp.mako
+++ /dev/null
@@ -1,172 +0,0 @@
-% if 'moments_vtk' in extras:
-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*${geometry.size_z}+z, rho, u);
- fout << rho << "\n";
- }
- }
- }
-% endif
-
- fout.close();
-}
-% endif
-
-void test_ldc(std::size_t nStep)
-{
- auto f_a = std::make_unique<${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
- }
- }
-
- 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();
- }
-
-% if 'omp_parallel_for' in extras:
-#pragma omp parallel for
-% endif
- 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. };
-% if 'omp_parallel_for' in extras:
-#pragma omp parallel for
-% endif
- 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;
-% if 'omp_parallel_for' in extras:
-#pragma omp parallel for
-% endif
- 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 << "#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;
- std::cout << "MLUPS : " << nStep*${geometry.volume}/(1e6*duration.count()) << std::endl;
-
-% if 'moments_vtk' in extras:
- collect_moments_to_vtk("test.vtk", f_next);
-% endif
-}