p3m_gpu_cuda.cuh File Reference

#include "system/GpuParticleData.hpp"
#include <utils/Vector.hpp>
#include <cstddef>
#include <memory>

Go to the source code of this file.

Functions
void	p3m_gpu_init (std::shared_ptr< P3MGpuParams > &data, int cao, Utils::Vector3i const &mesh, double alpha, Utils::Vector3d const &box_l, std::size_t n_part)
	Initialize the internal data structure of the P3M GPU.
void	p3m_gpu_add_farfield_force (P3MGpuParams &data, GpuParticleData &gpu, double prefactor, std::size_t n_part)
	The long-range part of the P3M algorithm.

Function Documentation

p3m_gpu_add_farfield_force()

void p3m_gpu_add_farfield_force	(	P3MGpuParams &	data,
		GpuParticleData &	gpu,
		double	prefactor,
		std::size_t	n_part
	)

The long-range part of the P3M algorithm.

Definition at line 672 of file p3m_gpu_cuda.cu.

References apply_diff_op(), apply_influence_function(), assign_charges(), assign_forces(), P3MGpuFftPlan::back_plan, cuda_safe_mem, FFT_BACK_FFT, FFT_FORW_FFT, P3MGpuFftPlan::forw_plan, GpuParticleData::get_particle_charges_device(), GpuParticleData::get_particle_forces_device(), GpuParticleData::get_particle_positions_device(), KERNELCALL, P3MGpuData::n_part, P3MGpuParams::p3m_fft, P3MGpuParams::p3m_gpu_data, Utils::product(), and REAL_TYPE.

Referenced by CoulombP3MImpl< FloatType, Architecture >::add_long_range_forces_gpu().

p3m_gpu_init()

void p3m_gpu_init	(	std::shared_ptr< P3MGpuParams > &	data,
		int	cao,
		Utils::Vector3i const &	mesh,
		double	alpha,
		Utils::Vector3d const &	box_l,
		std::size_t	n_part
	)

Initialize the internal data structure of the P3M GPU.

Mainly allocation on the device and influence function calculation. Be advised: this needs mesh^3*5*sizeof(REAL_TYPE) of device memory. We use real to complex FFTs, so the size of the reciprocal mesh is (cuFFT convention) Nx * Ny * ( Nz /2 + 1 ).

Definition at line 549 of file p3m_gpu_cuda.cu.

References Utils::Array< T, N >::begin(), block(), Utils::Vector< T, N >::broadcast(), cuda_safe_mem, Utils::Array< T, N >::end(), FFT_PLAN_BACK_FLAG, FFT_PLAN_FORW_FLAG, FFT_TYPE_COMPLEX, KERNELCALL, and REAL_TYPE.

Referenced by CoulombP3MImpl< FloatType, Architecture >::init_gpu_kernels().