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ljcl_cut_gpu.cpp
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Created
Tue, Aug 20, 17:16
Size
5 KB
Mime Type
text/x-c
Expires
Thu, Aug 22, 17:16 (1 d, 23 h)
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20030376
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rLAMMPS lammps
ljcl_cut_gpu.cpp
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
Contributing authors: Mike Brown (ORNL), brownw@ornl.gov
------------------------------------------------------------------------- */
#include <iostream>
#include <cassert>
#include <math.h>
#include "ljcl_cut_gpu_memory.h"
using
namespace
std
;
static
LJCL_GPU_Memory
<
PRECISION
,
ACC_PRECISION
>
LJCLMF
;
// ---------------------------------------------------------------------------
// Allocate memory on host and device and copy constants to device
// ---------------------------------------------------------------------------
bool
ljcl_gpu_init
(
const
int
ntypes
,
double
**
cutsq
,
double
**
host_lj1
,
double
**
host_lj2
,
double
**
host_lj3
,
double
**
host_lj4
,
double
**
offset
,
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
,
double
**
host_cut_ljsq
,
double
host_cut_coulsq
,
double
*
host_special_coul
,
const
double
qqrd2e
,
const
double
g_ewald
)
{
LJCLMF
.
clear
();
gpu_mode
=
LJCLMF
.
device
->
gpu_mode
();
double
gpu_split
=
LJCLMF
.
device
->
particle_split
();
int
first_gpu
=
LJCLMF
.
device
->
first_device
();
int
last_gpu
=
LJCLMF
.
device
->
last_device
();
int
world_me
=
LJCLMF
.
device
->
world_me
();
int
gpu_rank
=
LJCLMF
.
device
->
gpu_rank
();
int
procs_per_gpu
=
LJCLMF
.
device
->
procs_per_gpu
();
LJCLMF
.
device
->
init_message
(
screen
,
"lj/cut/coul/long"
,
first_gpu
,
last_gpu
);
bool
message
=
false
;
if
(
world_me
==
0
&&
screen
)
message
=
true
;
if
(
message
)
{
fprintf
(
screen
,
"Initializing GPU and compiling on process 0..."
);
fflush
(
screen
);
}
if
(
world_me
==
0
)
{
bool
init_ok
=
LJCLMF
.
init
(
ntypes
,
cutsq
,
host_lj1
,
host_lj2
,
host_lj3
,
host_lj4
,
offset
,
special_lj
,
inum
,
nall
,
300
,
maxspecial
,
cell_size
,
gpu_split
,
screen
,
host_cut_ljsq
,
host_cut_coulsq
,
host_special_coul
,
qqrd2e
,
g_ewald
);
if
(
!
init_ok
)
return
false
;
}
MPI_Barrier
(
MPI_COMM_WORLD
);
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 GPU %d on core %d..."
,
gpu_rank
,
i
);
else
fprintf
(
screen
,
"Initializing GPUs %d-%d on core %d..."
,
first_gpu
,
last_gpu
,
i
);
fflush
(
screen
);
}
if
(
gpu_rank
==
i
&&
world_me
!=
0
)
{
bool
init_ok
=
LJCLMF
.
init
(
ntypes
,
cutsq
,
host_lj1
,
host_lj2
,
host_lj3
,
host_lj4
,
offset
,
special_lj
,
inum
,
nall
,
300
,
maxspecial
,
cell_size
,
gpu_split
,
screen
,
host_cut_ljsq
,
host_cut_coulsq
,
host_special_coul
,
qqrd2e
,
g_ewald
);
if
(
!
init_ok
)
return
false
;
}
MPI_Barrier
(
LJCLMF
.
device
->
gpu_comm
);
if
(
message
)
fprintf
(
screen
,
"Done.
\n
"
);
}
if
(
message
)
fprintf
(
screen
,
"
\n
"
);
return
true
;
}
void
ljcl_gpu_clear
()
{
LJCLMF
.
clear
();
}
int
*
ljcl_gpu_compute_n
(
const
int
timestep
,
const
int
ago
,
const
int
inum_full
,
const
int
nall
,
double
**
host_x
,
int
*
host_type
,
double
*
boxlo
,
double
*
boxhi
,
int
*
tag
,
int
**
nspecial
,
int
**
special
,
const
bool
eflag
,
const
bool
vflag
,
const
bool
eatom
,
const
bool
vatom
,
int
&
host_start
,
const
double
cpu_time
,
bool
&
success
,
double
*
host_q
)
{
return
LJCLMF
.
compute
(
timestep
,
ago
,
inum_full
,
nall
,
host_x
,
host_type
,
boxlo
,
boxhi
,
tag
,
nspecial
,
special
,
eflag
,
vflag
,
eatom
,
vatom
,
host_start
,
cpu_time
,
success
,
host_q
);
}
void
ljcl_gpu_compute
(
const
int
timestep
,
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
,
double
*
host_q
)
{
LJCLMF
.
compute
(
timestep
,
ago
,
inum_full
,
nall
,
host_x
,
host_type
,
ilist
,
numj
,
firstneigh
,
eflag
,
vflag
,
eatom
,
vatom
,
host_start
,
cpu_time
,
success
,
host_q
);
}
double
ljcl_gpu_bytes
()
{
return
LJCLMF
.
host_memory_usage
();
}
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