1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/***************************************************************************
dpd_ext.cpp
-------------------
Trung Dac Nguyen (ORNL)
Functions for LAMMPS access to dpd acceleration routines.
__________________________________________________________________________
This file is part of the LAMMPS Accelerator Library (LAMMPS_AL)
__________________________________________________________________________
begin : Jan 15, 2014
email : nguyentd@ornl.gov
***************************************************************************/
#include <iostream>
#include <cassert>
#include <cmath>
#include "lal_dpd.h"
using namespace std;
using namespace LAMMPS_AL;
static DPD<PRECISION,ACC_PRECISION> DPDMF;
// ---------------------------------------------------------------------------
// Allocate memory on host and device and copy constants to device
// ---------------------------------------------------------------------------
int dpd_gpu_init(const int ntypes, double **cutsq, double **host_a0,
double **host_gamma, double **host_sigma, double **host_cut,
double *special_lj, const int inum,
const int nall, const int max_nbors, const int maxspecial,
const double cell_size, int &gpu_mode, FILE *screen) {
DPDMF.clear();
gpu_mode=DPDMF.device->gpu_mode();
double gpu_split=DPDMF.device->particle_split();
int first_gpu=DPDMF.device->first_device();
int last_gpu=DPDMF.device->last_device();
int world_me=DPDMF.device->world_me();
int gpu_rank=DPDMF.device->gpu_rank();
int procs_per_gpu=DPDMF.device->procs_per_gpu();
DPDMF.device->init_message(screen,"dpd",first_gpu,last_gpu);
bool message=false;
if (DPDMF.device->replica_me()==0 && screen)
message=true;
if (message) {
fprintf(screen,"Initializing Device and compiling on process 0...");
fflush(screen);
}
int init_ok=0;
if (world_me==0)
init_ok=DPDMF.init(ntypes, cutsq, host_a0, host_gamma, host_sigma,
host_cut, special_lj, false, inum, nall, max_nbors,
maxspecial, cell_size, gpu_split, screen);
DPDMF.device->world_barrier();
if (message)
fprintf(screen,"Done.\n");
for (int i=0; i<procs_per_gpu; i++) {
if (message) {
if (last_gpu-first_gpu==0)
fprintf(screen,"Initializing Device %d on core %d...",first_gpu,i);
else
fprintf(screen,"Initializing Devices %d-%d on core %d...",first_gpu,
last_gpu,i);
fflush(screen);
}
if (gpu_rank==i && world_me!=0)
init_ok=DPDMF.init(ntypes, cutsq, host_a0, host_gamma, host_sigma,
host_cut, special_lj, false, inum, nall, max_nbors,
maxspecial, cell_size, gpu_split, screen);
DPDMF.device->gpu_barrier();
if (message)
fprintf(screen,"Done.\n");
}
if (message)
fprintf(screen,"\n");
if (init_ok==0)
DPDMF.estimate_gpu_overhead();
return init_ok;
}
void dpd_gpu_clear() {
DPDMF.clear();
}
int ** dpd_gpu_compute_n(const int ago, const int inum_full, const int nall,
double **host_x, int *host_type, double *sublo,
double *subhi, tagint *tag, int **nspecial,
tagint **special, const bool eflag, const bool vflag,
const bool eatom, const bool vatom, int &host_start,
int **ilist, int **jnum, const double cpu_time, bool &success,
double **host_v, const double dtinvsqrt,
const int seed, const int timestep,
double *boxlo, double *prd) {
return DPDMF.compute(ago, inum_full, nall, host_x, host_type, sublo,
subhi, tag, nspecial, special, eflag, vflag, eatom,
vatom, host_start, ilist, jnum, cpu_time, success,
host_v, dtinvsqrt, seed, timestep, boxlo, prd);
}
void dpd_gpu_compute(const int ago, const int inum_full, const int nall,
double **host_x, int *host_type, int *ilist, int *numj,
int **firstneigh, const bool eflag, const bool vflag,
const bool eatom, const bool vatom, int &host_start,
const double cpu_time, bool &success, tagint *tag,
double **host_v, const double dtinvsqrt,
const int seed, const int timestep,
const int nlocal, double *boxlo, double *prd) {
DPDMF.compute(ago, inum_full, nall, host_x, host_type, ilist, numj,
firstneigh, eflag, vflag, eatom, vatom, host_start, cpu_time, success,
tag, host_v, dtinvsqrt, seed, timestep, nlocal, boxlo, prd);
}
void dpd_gpu_update_coeff(int ntypes, double **host_a0, double **host_gamma,
double **host_sigma, double **host_cut)
{
DPDMF.update_coeff(ntypes,host_a0,host_gamma,host_sigma,host_cut);
}
double dpd_gpu_bytes() {
return DPDMF.host_memory_usage();
}
|
