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#include <LLBM/base.h>
#include <LLBM/kernel/collide.h>
#include <LLBM/kernel/bounce_back.h>
#include <LLBM/kernel/bounce_back_moving_wall.h>
#include "util/timer.h"
#include <iostream>
using DESCRIPTOR = descriptor::D3Q19;
template <typename T>
void simulate(descriptor::Cuboid<DESCRIPTOR> cuboid, std::size_t nStep) {
cudaSetDevice(0);
Lattice<DESCRIPTOR,T> lattice(cuboid);
CellMaterials<DESCRIPTOR> materials(cuboid, [&cuboid](uint3 p) -> int {
if (p.x == 0 || p.x == cuboid.nX-1 || p.y == 0 || p.y == cuboid.nY-1 || p.z == 0) {
return 2; // boundary cell
} else if (p.z == cuboid.nZ-1) {
return 3; // lid cell
} else {
return 1; // bulk
}
});
auto bulk_mask = materials.mask_of_material(1);
auto box_mask = materials.mask_of_material(2);
auto lid_mask = materials.mask_of_material(3);
auto bulk_cells = materials.list_of_material(1);
auto box_cells = materials.list_of_material(2);
auto lid_cells = materials.list_of_material(3);
lattice.template apply<InitializeO>(bulk_cells);
lattice.template apply<InitializeO>(box_cells);
lattice.template apply<InitializeO>(lid_cells);
cudaDeviceSynchronize();
for (std::size_t iStep=0; iStep < 100; ++iStep) {
lattice.apply(Operator(BgkCollideO(), bulk_mask, 0.56),
Operator(BounceBackO(), box_mask),
Operator(BounceBackMovingWallO(), lid_mask, 0.05f, 0.f, 0.f));
lattice.stream();
}
cudaDeviceSynchronize();
auto start = timer::now();
for (std::size_t iStep=0; iStep < nStep; ++iStep) {
lattice.apply(Operator(BgkCollideO(), bulk_mask, 0.56),
Operator(BounceBackO(), box_mask),
Operator(BounceBackMovingWallO(), lid_mask, 0.05f, 0.f, 0.f));
lattice.stream();
}
cudaDeviceSynchronize();
auto mlups = timer::mlups(cuboid.volume, nStep, start);
std::cout << sizeof(T) << ", " << cuboid.nX << ", " << nStep << ", " << mlups << std::endl;
}
int main(int argc, char* argv[]) {
if (argc < 3 || argc > 4) {
std::cerr << "Invalid parameter count" << std::endl;
return -1;
}
const std::size_t n = atoi(argv[1]);
const std::size_t steps = atoi(argv[2]);
unsigned precision = 4;
if (argc == 4) {
precision = atoi(argv[3]);
}
switch (precision) {
case 4:
simulate<float>({ n, n, n}, steps);
break;
case 8:
simulate<double>({ n, n, n}, steps);
break;
default:
std::cerr << "Invalid precision" << std::endl;
return -1;
}
return 0;
}
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