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fix_viscous_cuda.cpp
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Created
Tue, Jul 23, 15:18
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2 KB
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text/x-c
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Thu, Jul 25, 15:18 (2 d)
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blob
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rLAMMPS lammps
fix_viscous_cuda.cpp
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
Original Version:
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
See the README file in the top-level LAMMPS directory.
-----------------------------------------------------------------------
USER-CUDA Package and associated modifications:
https://sourceforge.net/projects/lammpscuda/
Christian Trott, christian.trott@tu-ilmenau.de
Lars Winterfeld, lars.winterfeld@tu-ilmenau.de
Theoretical Physics II, University of Technology Ilmenau, Germany
See the README file in the USER-CUDA directory.
This software is distributed under the GNU General Public License.
------------------------------------------------------------------------- */
#include <cmath>
#include <cstdlib>
#include <cstring>
#include "fix_viscous_cuda.h"
#include "fix_viscous_cuda_cu.h"
#include "atom.h"
#include "update.h"
#include "respa.h"
#include "error.h"
#include "cuda_modify_flags.h"
#include "user_cuda.h"
using
namespace
LAMMPS_NS
;
using
namespace
FixConst
;
using
namespace
FixConstCuda
;
/* ---------------------------------------------------------------------- */
FixViscousCuda
::
FixViscousCuda
(
LAMMPS
*
lmp
,
int
narg
,
char
**
arg
)
:
FixViscous
(
lmp
,
narg
,
arg
)
{
cuda
=
lmp
->
cuda
;
if
(
cuda
==
NULL
)
error
->
all
(
FLERR
,
"You cannot use a /cuda class, without activating 'cuda' acceleration. Provide '-c on' as command-line argument to LAMMPS.."
);
cu_gamma
=
NULL
;
}
/* ---------------------------------------------------------------------- */
FixViscousCuda
::~
FixViscousCuda
()
{
delete
cu_gamma
;
}
/* ---------------------------------------------------------------------- */
int
FixViscousCuda
::
setmask
()
{
int
mask
=
0
;
mask
|=
POST_FORCE_CUDA
;
// mask |= POST_FORCE_RESPA;
// mask |= MIN_POST_FORCE;
return
mask
;
}
/* ---------------------------------------------------------------------- */
void
FixViscousCuda
::
setup
(
int
vflag
)
{
if
(
not
cu_gamma
)
cu_gamma
=
new
cCudaData
<
double
,
F_CFLOAT
,
x
>
(
gamma
,
atom
->
ntypes
+
1
);
Cuda_FixViscousCuda_Init
(
&
cuda
->
shared_data
);
cu_gamma
->
upload
();
// if (strcmp(update->integrate_style,"verlet/cuda") == 0)
post_force
(
vflag
);
/* else {
((Respa *) update->integrate)->copy_flevel_f(nlevels_respa-1);
post_force_respa(vflag,nlevels_respa-1,0);
((Respa *) update->integrate)->copy_f_flevel(nlevels_respa-1);
}*/
}
/* ---------------------------------------------------------------------- */
void
FixViscousCuda
::
min_setup
(
int
vflag
)
{
Cuda_FixViscousCuda_Init
(
&
cuda
->
shared_data
);
post_force
(
vflag
);
}
/* ---------------------------------------------------------------------- */
void
FixViscousCuda
::
post_force
(
int
vflag
)
{
// apply drag force to atoms in group
// direction is opposed to velocity vector
// magnitude depends on atom type
Cuda_FixViscousCuda_PostForce
(
&
cuda
->
shared_data
,
groupbit
,
cu_gamma
->
dev_data
());
}
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