forked from lijiext/lammps
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
/* ----------------------------------------------------------------------
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LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
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http://lammps.sandia.gov, Sandia National Laboratories
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Steve Plimpton, sjplimp@sandia.gov
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Copyright (2003) Sandia Corporation. Under the terms of Contract
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DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
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certain rights in this software. This software is distributed under
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the GNU General Public License.
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See the README file in the top-level LAMMPS directory.
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------------------------------------------------------------------------- */
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/* ----------------------------------------------------------------------
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Contributing author: Inderaj Bains (NVIDIA), ibains@nvidia.com
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------------------------------------------------------------------------- */
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#ifndef LJE_GPU_MEMORY_H
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#define LJE_GPU_MEMORY_H
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#include "atomic_gpu_memory.h"
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template <class numtyp, class acctyp>
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class LJE_GPU_Memory : public AtomicGPUMemory<numtyp, acctyp> {
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public:
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LJE_GPU_Memory();
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~LJE_GPU_Memory();
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/// Clear any previous data and set up for a new LAMMPS run
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/** \param max_nbors initial number of rows in the neighbor matrix
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* \param cell_size cutoff + skin
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* \param gpu_split fraction of particles handled by device
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*
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* Returns:
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* - 0 if successfull
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* - -1 if fix gpu not found
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* - -3 if there is an out of memory error
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* - -4 if the GPU library was not compiled for GPU
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* - -5 Double precision is not supported on card **/
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int init(const int ntypes, double **host_cutsq, double **host_lj1,
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double **host_lj2, double **host_lj3, double **host_lj4,
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double **host_offset, double **host_shift, double *host_special_lj,
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const int nlocal, const int nall, const int max_nbors,
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const int maxspecial, const double cell_size,
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const double gpu_split, FILE *screen);
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/// Clear all host and device data
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/** \note This is called at the beginning of the init() routine **/
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void clear();
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/// Returns memory usage on device per atom
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int bytes_per_atom(const int max_nbors) const;
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/// Total host memory used by library for pair style
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double host_memory_usage() const;
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// --------------------------- TYPE DATA --------------------------
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/// lj1.x = lj1, lj1.y = lj2, lj1.z = cutsq, lj1.w = shift
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UCL_D_Vec<numtyp4> lj1;
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/// lj3.x = lj3, lj3.y = lj4, lj3.z = offset
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UCL_D_Vec<numtyp4> lj3;
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/// Special LJ values
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UCL_D_Vec<numtyp> sp_lj;
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/// If atom type constants fit in shared memory, use fast kernels
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bool shared_types;
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/// Number of atom types
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int _lj_types;
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private:
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bool _allocated;
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void loop(const bool _eflag, const bool _vflag);
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};
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#endif
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