Example of SIMD-optimized particle simulation using shared memory. More...
#include <iostream>#include <chrono>#include <random>#include <iomanip>#include "posix_shm.h"#include "shm_array.h"#include "shm_simd_utils.h"
Include dependency graph for simd_simulation.cpp:Go to the source code of this file.
Classes | |
| struct | ParticleSystemSoA |
Functions | |
| void | initialize_particles (ParticleSystemSoA &particles) |
| void | update_physics_scalar (ParticleSystemSoA &particles, float dt) |
| void | update_physics_simd (ParticleSystemSoA &particles, float dt) |
| float | calculate_kinetic_energy_scalar (ParticleSystemSoA &particles) |
| float | calculate_kinetic_energy_simd (ParticleSystemSoA &particles) |
| int | main () |
Variables | |
| constexpr size_t | NUM_PARTICLES = 100000 |
| constexpr size_t | ITERATIONS = 100 |
Detailed Description
Example of SIMD-optimized particle simulation using shared memory.
Demonstrates:
- SIMD operations on shared memory arrays
- Structure of Arrays (SoA) layout for better vectorization
- Cache-friendly access patterns
- Performance comparison vs scalar operations
Definition in file simd_simulation.cpp.
Function Documentation
◆ calculate_kinetic_energy_scalar()
| float calculate_kinetic_energy_scalar | ( | ParticleSystemSoA & | particles | ) |
Definition at line 160 of file simd_simulation.cpp.
References ParticleSystemSoA::mass, NUM_PARTICLES, ParticleSystemSoA::vx, ParticleSystemSoA::vy, and ParticleSystemSoA::vz.
Referenced by main().
◆ calculate_kinetic_energy_simd()
| float calculate_kinetic_energy_simd | ( | ParticleSystemSoA & | particles | ) |
Definition at line 174 of file simd_simulation.cpp.
References shm_array< T, TableType >::data(), shm_simd::dot_product(), ParticleSystemSoA::mass, NUM_PARTICLES, shm_simd::scale_floats(), shm_span< T, ShmType >::shm, ParticleSystemSoA::vx, ParticleSystemSoA::vy, ParticleSystemSoA::vz, and ParticleSystemSoA::x.
Referenced by main().
◆ initialize_particles()
| void initialize_particles | ( | ParticleSystemSoA & | particles | ) |
Definition at line 45 of file simd_simulation.cpp.
References ParticleSystemSoA::ax, ParticleSystemSoA::ay, ParticleSystemSoA::az, ParticleSystemSoA::mass, NUM_PARTICLES, ParticleSystemSoA::vx, ParticleSystemSoA::vy, ParticleSystemSoA::vz, ParticleSystemSoA::x, ParticleSystemSoA::y, and ParticleSystemSoA::z.
Referenced by main().
◆ main()
| int main | ( | ) |
Definition at line 208 of file simd_simulation.cpp.
References calculate_kinetic_energy_scalar(), calculate_kinetic_energy_simd(), shm_array< T, TableType >::data(), initialize_particles(), shm_simd::is_aligned(), ITERATIONS, shm_simd::SimdArray< TableType >::max(), shm_simd::SimdArray< TableType >::min(), NUM_PARTICLES, shm_simd::SimdArray< TableType >::sum(), update_physics_scalar(), update_physics_simd(), ParticleSystemSoA::vx, and ParticleSystemSoA::x.
◆ update_physics_scalar()
| void update_physics_scalar | ( | ParticleSystemSoA & | particles, |
| float | dt | ||
| ) |
Definition at line 70 of file simd_simulation.cpp.
References ParticleSystemSoA::ax, ParticleSystemSoA::ay, ParticleSystemSoA::az, NUM_PARTICLES, ParticleSystemSoA::vx, ParticleSystemSoA::vy, ParticleSystemSoA::vz, ParticleSystemSoA::x, ParticleSystemSoA::y, and ParticleSystemSoA::z.
Referenced by main().
◆ update_physics_simd()
| void update_physics_simd | ( | ParticleSystemSoA & | particles, |
| float | dt | ||
| ) |
Definition at line 91 of file simd_simulation.cpp.
References ParticleSystemSoA::ax, ParticleSystemSoA::ay, ParticleSystemSoA::az, NUM_PARTICLES, ParticleSystemSoA::vx, ParticleSystemSoA::vy, ParticleSystemSoA::vz, ParticleSystemSoA::x, ParticleSystemSoA::y, and ParticleSystemSoA::z.
Referenced by main().
Variable Documentation
◆ ITERATIONS
|
constexpr |
Definition at line 25 of file simd_simulation.cpp.
Referenced by main().
◆ NUM_PARTICLES
|
constexpr |
Definition at line 24 of file simd_simulation.cpp.
Referenced by calculate_kinetic_energy_scalar(), calculate_kinetic_energy_simd(), initialize_particles(), main(), update_physics_scalar(), and update_physics_simd().
