559 lines
17 KiB
C++
559 lines
17 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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This software is distributed under 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: W. Michael Brown (Intel)
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------------------------------------------------------------------------- */
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#include "intel_buffers.h"
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#include "force.h"
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#include "memory.h"
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using namespace LAMMPS_NS;
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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IntelBuffers<flt_t, acc_t>::IntelBuffers(class LAMMPS *lmp_in) :
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lmp(lmp_in), _x(0), _q(0), _quat(0), _f(0), _off_threads(0),
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_buf_size(0), _buf_local_size(0) {
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_list_alloc_atoms = 0;
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_ntypes = 0;
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_off_map_maxlocal = 0;
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_ccachex = 0;
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_host_nmax = 0;
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#ifdef _LMP_INTEL_OFFLOAD
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_separate_buffers = 0;
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_off_f = 0;
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_off_map_ilist = 0;
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_off_map_nmax = 0;
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_off_map_maxhead = 0;
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_off_list_alloc = false;
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_off_threads = 0;
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_off_ccache = 0;
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#endif
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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IntelBuffers<flt_t, acc_t>::~IntelBuffers()
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{
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free_buffers();
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free_all_nbor_buffers();
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free_ccache();
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set_ntypes(0);
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::free_buffers()
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{
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if (_buf_size > 0) {
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atom_t * x = get_x();
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flt_t * q = get_q();
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quat_t * quat = get_quat();
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#ifdef _LMP_INTEL_OFFLOAD
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vec3_acc_t * f_start = get_off_f();
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if (f_start != 0) {
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acc_t * ev_global = get_ev_global();
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if (ev_global != 0) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(x:alloc_if(0) free_if(1)) \
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nocopy(f_start:alloc_if(0) free_if(1)) \
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nocopy(ev_global:alloc_if(0) free_if(1))
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}
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if (q != 0) {
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#pragma offload_transfer target (mic:_cop) \
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nocopy(q:alloc_if(0) free_if(1))
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}
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if (quat != 0) {
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#pragma offload_transfer target (mic:_cop) \
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nocopy(quat:alloc_if(0) free_if(1))
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}
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lmp->memory->destroy(f_start);
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}
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if (_separate_buffers) {
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lmp->memory->destroy(_host_x);
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if (q != 0) lmp->memory->destroy(_host_q);
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if (quat != 0) lmp->memory->destroy(_host_quat);
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}
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#endif
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lmp->memory->destroy(x);
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if (q != 0) lmp->memory->destroy(q);
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if (quat != 0) lmp->memory->destroy(quat);
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lmp->memory->destroy(_f);
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_buf_size = _buf_local_size = 0;
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}
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::_grow(const int nall, const int nlocal,
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const int nthreads,
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const int offload_end)
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{
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free_buffers();
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_buf_size = static_cast<double>(nall) * 1.1 + 1;
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if (lmp->force->newton_pair)
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_buf_local_size = _buf_size;
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else
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_buf_local_size = static_cast<double>(nlocal) * 1.1 + 1;
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if (lmp->atom->torque)
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_buf_local_size *= 2;
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const int f_stride = get_stride(_buf_local_size);
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lmp->memory->create(_x, _buf_size,"intel_x");
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if (lmp->atom->q != NULL)
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lmp->memory->create(_q, _buf_size, "intel_q");
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if (lmp->atom->ellipsoid != NULL)
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lmp->memory->create(_quat, _buf_size, "intel_quat");
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lmp->memory->create(_f, f_stride * nthreads, "intel_f");
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#ifdef _LMP_INTEL_OFFLOAD
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if (_separate_buffers) {
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lmp->memory->create(_host_x, _buf_size,"intel_host_x");
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if (lmp->atom->q != NULL)
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lmp->memory->create(_host_q, _buf_size, "intel_host_q");
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if (lmp->atom->ellipsoid != NULL)
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lmp->memory->create(_host_quat, _buf_size, "intel_host_quat");
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}
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if (offload_end > 0) {
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lmp->memory->create(_off_f, f_stride * _off_threads, "intel_off_f");
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const atom_t * const x = get_x();
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const flt_t * const q = get_q();
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const vec3_acc_t * f_start = get_off_f();
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acc_t * ev_global = get_ev_global();
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if (lmp->atom->q != NULL) {
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if (x != NULL && q != NULL && f_start != NULL && ev_global != NULL) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(x,q:length(_buf_size) alloc_if(1) free_if(0)) \
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nocopy(f_start:length(f_stride*_off_threads) alloc_if(1) free_if(0))\
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nocopy(ev_global:length(8) alloc_if(1) free_if(0))
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}
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} else {
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if (x != NULL && f_start != NULL && ev_global != NULL) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(x:length(_buf_size) alloc_if(1) free_if(0)) \
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nocopy(f_start:length(f_stride*_off_threads) alloc_if(1) free_if(0))\
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nocopy(ev_global:length(8) alloc_if(1) free_if(0))
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}
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}
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if (lmp->atom->ellipsoid != NULL) {
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const quat_t * const quat = get_quat();
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if (quat != NULL) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(quat:length(_buf_size) alloc_if(1) free_if(0))
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}
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}
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}
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#endif
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::free_nmax()
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{
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#ifdef _LMP_INTEL_OFFLOAD
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if (_off_map_nmax > 0) {
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const int * tag = _off_map_tag;
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const int * special = _off_map_special;
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const int * nspecial = _off_map_nspecial;
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const int * bins = _off_map_bins;
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const int * binpacked = _binpacked;
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if (tag != 0 && special != 0 && nspecial !=0 && bins != 0) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(tag:alloc_if(0) free_if(1)) \
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nocopy(special,nspecial:alloc_if(0) free_if(1)) \
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nocopy(bins,binpacked:alloc_if(0) free_if(1))
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}
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_off_map_nmax = 0;
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}
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#endif
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if (_host_nmax > 0) {
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lmp->memory->destroy(_binpacked);
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_host_nmax = 0;
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}
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::_grow_nmax(const int offload_end)
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{
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free_nmax();
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int size = lmp->atom->nmax;
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_host_nmax = size;
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lmp->memory->create(_binpacked, _host_nmax, "_binpacked");
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#ifdef _LMP_INTEL_OFFLOAD
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if (!offload_end) return;
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int *special, *nspecial;
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int tag_length, special_length, nspecial_length;
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if (lmp->atom->molecular) {
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special = lmp->atom->special[0];
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nspecial = lmp->atom->nspecial[0];
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special_length = size * lmp->atom->maxspecial;
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nspecial_length = size * 3;
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} else {
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special = &_special_holder;
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nspecial = &_nspecial_holder;
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special_length = 1;
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nspecial_length = 1;
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}
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if (_need_tag)
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tag_length = size;
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else
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tag_length = 1;
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int *tag = lmp->atom->tag;
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int *bins = lmp->neighbor->bins;
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int * binpacked = _binpacked;
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#pragma offload_transfer target(mic:_cop) \
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nocopy(bins,binpacked:length(size) alloc_if(1) free_if(0)) \
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nocopy(tag:length(tag_length) alloc_if(1) free_if(0)) \
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nocopy(special:length(special_length) alloc_if(1) free_if(0)) \
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nocopy(nspecial:length(nspecial_length) alloc_if(1) free_if(0))
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_off_map_tag = tag;
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_off_map_special = special;
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_off_map_nspecial = nspecial;
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_off_map_nmax = size;
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_off_map_bins = bins;
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#endif
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::free_local()
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{
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if (_off_map_maxlocal > 0) {
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int * cnumneigh = _cnumneigh;
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int * atombin = _atombin;
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#ifdef _LMP_INTEL_OFFLOAD
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if (_off_map_ilist != NULL) {
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const int * ilist = _off_map_ilist;
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const int * numneigh = _off_map_numneigh;
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_off_map_ilist = NULL;
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if (numneigh != 0 && ilist != 0) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(ilist,numneigh,cnumneigh,atombin:alloc_if(0) free_if(1))
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}
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}
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#endif
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lmp->memory->destroy(cnumneigh);
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lmp->memory->destroy(atombin);
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_off_map_maxlocal = 0;
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}
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::_grow_local(NeighList *list,
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const int offload_end)
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{
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free_local();
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int size = list->get_maxlocal();
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lmp->memory->create(_cnumneigh, size, "_cnumneigh");
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lmp->memory->create(_atombin, size, "_atombin");
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_off_map_maxlocal = size;
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#ifdef _LMP_INTEL_OFFLOAD
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if (offload_end > 0) {
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int * numneigh = list->numneigh;
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int * ilist = list->ilist;
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int * cnumneigh = _cnumneigh;
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int * atombin = _atombin;
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if (cnumneigh != 0 && atombin != 0) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(ilist:length(size) alloc_if(1) free_if(0)) \
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nocopy(numneigh:length(size) alloc_if(1) free_if(0)) \
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nocopy(cnumneigh:length(size) alloc_if(1) free_if(0)) \
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nocopy(atombin:length(size) alloc_if(1) free_if(0))
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}
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_off_map_ilist = ilist;
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_off_map_numneigh = numneigh;
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}
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#endif
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::free_binhead()
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{
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#ifdef _LMP_INTEL_OFFLOAD
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if (_off_map_maxhead > 0) {
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const int * binhead = _off_map_binhead;
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if (binhead !=0) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(binhead:alloc_if(0) free_if(1))
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}
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_off_map_maxhead = 0;
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}
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#endif
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::_grow_binhead()
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{
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#ifdef _LMP_INTEL_OFFLOAD
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free_binhead();
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int * binhead = lmp->neighbor->binhead;
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const int maxhead = lmp->neighbor->maxhead;
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#pragma offload_transfer target(mic:_cop) \
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nocopy(binhead:length(maxhead+1) alloc_if(1) free_if(0))
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_off_map_binhead = binhead;
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_off_map_maxhead = maxhead;
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#endif
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::free_nbor_list()
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{
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if (_list_alloc_atoms > 0) {
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#ifdef _LMP_INTEL_OFFLOAD
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if (_off_list_alloc) {
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int * list_alloc = _list_alloc;
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int * stencil = _off_map_stencil;
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if (list_alloc != 0 && stencil != 0) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(list_alloc:alloc_if(0) free_if(1))
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}
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_off_list_alloc = false;
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}
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#endif
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lmp->memory->destroy(_list_alloc);
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_list_alloc_atoms = 0;
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}
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::_grow_nbor_list(NeighList *list,
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const int nlocal,
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const int nthreads,
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const int offload_end,
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const int pack_width)
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{
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free_nbor_list();
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_list_alloc_atoms = 1.10 * nlocal;
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int nt = MAX(nthreads, _off_threads);
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int list_alloc_size = (_list_alloc_atoms + nt * 2 + pack_width - 1) *
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get_max_nbors();
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lmp->memory->create(_list_alloc, list_alloc_size, "_list_alloc");
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#ifdef _LMP_INTEL_OFFLOAD
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if (offload_end > 0) {
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int * list_alloc =_list_alloc;
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int * stencil = list->stencil;
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if (list_alloc != NULL) {
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#pragma offload_transfer target(mic:_cop) \
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in(stencil:length(list->maxstencil) alloc_if(1) free_if(0)) \
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nocopy(list_alloc:length(list_alloc_size) alloc_if(1) free_if(0))
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_off_map_stencil = stencil;
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_off_list_alloc = true;
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}
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}
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#endif
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}
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::_grow_stencil(NeighList *list)
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{
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#ifdef _LMP_INTEL_OFFLOAD
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int * stencil = _off_map_stencil;
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#pragma offload_transfer target(mic:_cop) \
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nocopy(stencil:alloc_if(0) free_if(1))
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stencil = list->stencil;
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#pragma offload_transfer target(mic:_cop) \
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in(stencil:length(list->maxstencil) alloc_if(1) free_if(0))
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_off_map_stencil = stencil;
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#endif
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::free_ccache()
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{
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if (_ccachex) {
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flt_t *ccachex = _ccachex;
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flt_t *ccachey = _ccachey;
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flt_t *ccachez = _ccachez;
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flt_t *ccachew = _ccachew;
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int *ccachei = _ccachei;
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int *ccachej = _ccachej;
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#ifdef LMP_USE_AVXCD
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acc_t *ccachef = _ccachef;
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#endif
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#ifdef _LMP_INTEL_OFFLOAD
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if (_off_ccache) {
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#pragma offload_transfer target(mic:_cop) \
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nocopy(ccachex,ccachey,ccachez,ccachew:alloc_if(0) free_if(1)) \
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nocopy(ccachei,ccachej:alloc_if(0) free_if(1))
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#ifdef LMP_USE_AVXCD
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#pragma offload_transfer target(mic:_cop) \
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nocopy(ccachef:alloc_if(0) free_if(1))
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#endif
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}
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_off_ccache = 0;
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#endif
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lmp->memory->destroy(ccachex);
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lmp->memory->destroy(ccachey);
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lmp->memory->destroy(ccachez);
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lmp->memory->destroy(ccachew);
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lmp->memory->destroy(ccachei);
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lmp->memory->destroy(ccachej);
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#ifdef LMP_USE_AVXCD
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lmp->memory->destroy(ccachef);
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#endif
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_ccachex = 0;
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}
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}
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/* ---------------------------------------------------------------------- */
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template <class flt_t, class acc_t>
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void IntelBuffers<flt_t, acc_t>::grow_ccache(const int off_flag,
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const int nthreads,
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const int width)
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{
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#ifdef _LMP_INTEL_OFFLOAD
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if (_ccachex && off_flag && _off_ccache == 0)
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free_ccache();
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#endif
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if (_ccachex)
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return;
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const int nsize = get_max_nbors() * width;
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int esize = MIN(sizeof(int), sizeof(flt_t));
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IP_PRE_get_stride(_ccache_stride, nsize, esize, 0);
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int nt = MAX(nthreads, _off_threads);
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const int vsize = _ccache_stride * nt;
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lmp->memory->create(_ccachex, vsize , "_ccachex");
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lmp->memory->create(_ccachey, vsize, "_ccachey");
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lmp->memory->create(_ccachez, vsize, "_ccachez");
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lmp->memory->create(_ccachew, vsize, "_ccachew");
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lmp->memory->create(_ccachei, vsize, "_ccachei");
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lmp->memory->create(_ccachej, vsize, "_ccachej");
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#ifdef LMP_USE_AVXCD
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IP_PRE_get_stride(_ccache_stride3, nsize * 3, sizeof(acc_t), 0);
|
|
lmp->memory->create(_ccachef, _ccache_stride3 * nt, "_ccachef");
|
|
#endif
|
|
memset(_ccachej, 0, vsize * sizeof(int));
|
|
|
|
#ifdef _LMP_INTEL_OFFLOAD
|
|
if (off_flag) {
|
|
flt_t *ccachex = _ccachex;
|
|
flt_t *ccachey = _ccachey;
|
|
flt_t *ccachez = _ccachez;
|
|
flt_t *ccachew = _ccachew;
|
|
int *ccachei = _ccachei;
|
|
int *ccachej = _ccachej;
|
|
|
|
if (ccachex != NULL && ccachey !=NULL && ccachez != NULL &&
|
|
ccachew != NULL && ccachei != NULL && ccachej !=NULL) {
|
|
#pragma offload_transfer target(mic:_cop) \
|
|
nocopy(ccachex,ccachey:length(vsize) alloc_if(1) free_if(0)) \
|
|
nocopy(ccachez,ccachew:length(vsize) alloc_if(1) free_if(0)) \
|
|
nocopy(ccachei:length(vsize) alloc_if(1) free_if(0)) \
|
|
in(ccachej:length(vsize) alloc_if(1) free_if(0))
|
|
}
|
|
#ifdef LMP_USE_AVXCD
|
|
if (ccachef != NULL) {
|
|
#pragma offload_transfer target(mic:_cop) \
|
|
nocopy(ccachef:length(_ccache_stride3 * nt) alloc_if(1) free_if(0))
|
|
}
|
|
#endif
|
|
_off_ccache = 1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
template <class flt_t, class acc_t>
|
|
void IntelBuffers<flt_t, acc_t>::set_ntypes(const int ntypes)
|
|
{
|
|
if (ntypes != _ntypes) {
|
|
if (_ntypes > 0) {
|
|
#ifdef _LMP_INTEL_OFFLOAD
|
|
flt_t * cutneighsqo = _cutneighsq[0];
|
|
if (_off_threads > 0 && cutneighsqo != 0) {
|
|
#pragma offload_transfer target(mic:_cop) \
|
|
nocopy(cutneighsqo:alloc_if(0) free_if(1))
|
|
}
|
|
#endif
|
|
lmp->memory->destroy(_cutneighsq);
|
|
}
|
|
if (ntypes > 0) {
|
|
lmp->memory->create(_cutneighsq, ntypes, ntypes, "_cutneighsq");
|
|
#ifdef _LMP_INTEL_OFFLOAD
|
|
flt_t * cutneighsqo = _cutneighsq[0];
|
|
if (_off_threads > 0 && cutneighsqo != NULL) {
|
|
#pragma offload_transfer target(mic:_cop) \
|
|
nocopy(cutneighsqo:length(ntypes * ntypes) alloc_if(1) free_if(0))
|
|
}
|
|
#endif
|
|
}
|
|
_ntypes = ntypes;
|
|
}
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
template <class flt_t, class acc_t>
|
|
double IntelBuffers<flt_t, acc_t>::memory_usage(const int nthreads)
|
|
{
|
|
double tmem = sizeof(atom_t);
|
|
if (lmp->atom->q) tmem += sizeof(flt_t);
|
|
if (lmp->atom->torque) tmem += sizeof(quat_t);
|
|
#ifdef _LMP_INTEL_OFFLOAD
|
|
if (_separate_buffers) tmem *= 2;
|
|
#endif
|
|
tmem *= _buf_size;
|
|
|
|
const int fstride = get_stride(_buf_local_size);
|
|
tmem += fstride * nthreads * sizeof(vec3_acc_t);
|
|
#ifdef _LMP_INTEL_OFFLOAD
|
|
if (_off_f) tmem += fstride*_off_threads * sizeof(vec3_acc_t);
|
|
#endif
|
|
|
|
tmem += _off_map_maxlocal * sizeof(int) * 2;
|
|
tmem += (_list_alloc_atoms + _off_threads) * get_max_nbors() * sizeof(int);
|
|
tmem += _ntypes * _ntypes * sizeof(int);
|
|
|
|
return tmem;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
template class IntelBuffers<float,float>;
|
|
template class IntelBuffers<float,double>;
|
|
template class IntelBuffers<double,double>;
|