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rLAMMPS lammps
prd.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 author: Mike Brown (SNL)
------------------------------------------------------------------------- */
// lmptype.h must be first b/c this file uses MAXBIGINT and includes mpi.h
// due to OpenMPI bug which sets INT64_MAX via its mpi.h
// before lmptype.h can set flags to insure it is done correctly
#include "lmptype.h"
#include <mpi.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "prd.h"
#include "universe.h"
#include "update.h"
#include "atom.h"
#include "domain.h"
#include "region.h"
#include "comm.h"
#include "velocity.h"
#include "integrate.h"
#include "min.h"
#include "neighbor.h"
#include "modify.h"
#include "compute.h"
#include "fix.h"
#include "fix_event_prd.h"
#include "force.h"
#include "pair.h"
#include "random_park.h"
#include "random_mars.h"
#include "output.h"
#include "dump.h"
#include "finish.h"
#include "timer.h"
#include "memory.h"
#include "error.h"
using
namespace
LAMMPS_NS
;
/* ---------------------------------------------------------------------- */
PRD
::
PRD
(
LAMMPS
*
lmp
)
:
Pointers
(
lmp
)
{}
/* ----------------------------------------------------------------------
perform PRD simulation on one or more replicas
------------------------------------------------------------------------- */
void
PRD
::
command
(
int
narg
,
char
**
arg
)
{
int
ireplica
;
// error checks
if
(
domain
->
box_exist
==
0
)
error
->
all
(
FLERR
,
"PRD command before simulation box is defined"
);
if
(
universe
->
nworlds
!=
universe
->
nprocs
&&
atom
->
map_style
==
0
)
error
->
all
(
FLERR
,
"Cannot use PRD with multi-processor replicas "
"unless atom map exists"
);
if
(
universe
->
nworlds
==
1
&&
comm
->
me
==
0
)
error
->
warning
(
FLERR
,
"Running PRD with only one replica"
);
if
(
narg
<
7
)
error
->
universe_all
(
FLERR
,
"Illegal prd command"
);
// read as double so can cast to bigint
int
nsteps
=
force
->
inumeric
(
FLERR
,
arg
[
0
]);
t_event
=
force
->
inumeric
(
FLERR
,
arg
[
1
]);
n_dephase
=
force
->
inumeric
(
FLERR
,
arg
[
2
]);
t_dephase
=
force
->
inumeric
(
FLERR
,
arg
[
3
]);
t_corr
=
force
->
inumeric
(
FLERR
,
arg
[
4
]);
char
*
id_compute
=
new
char
[
strlen
(
arg
[
5
])
+
1
];
strcpy
(
id_compute
,
arg
[
5
]);
int
seed
=
force
->
inumeric
(
FLERR
,
arg
[
6
]);
options
(
narg
-
7
,
&
arg
[
7
]);
// total # of timesteps must be multiple of t_event
if
(
t_event
<=
0
)
error
->
universe_all
(
FLERR
,
"Invalid t_event in prd command"
);
if
(
nsteps
%
t_event
)
error
->
universe_all
(
FLERR
,
"PRD nsteps must be multiple of t_event"
);
if
(
t_corr
%
t_event
)
error
->
universe_all
(
FLERR
,
"PRD t_corr must be multiple of t_event"
);
// local storage
int
me_universe
=
universe
->
me
;
int
nprocs_universe
=
universe
->
nprocs
;
int
nreplica
=
universe
->
nworlds
;
int
iworld
=
universe
->
iworld
;
MPI_Comm_rank
(
world
,
&
me
);
MPI_Comm_size
(
world
,
&
nprocs
);
// comm_replica = communicator between all proc 0s across replicas
int
color
=
me
;
MPI_Comm_split
(
universe
->
uworld
,
color
,
0
,
&
comm_replica
);
// equal_size_replicas = 1 if all replicas have same # of procs
// no longer used
//flag = 0;
//if (nreplica*nprocs == nprocs_universe) flag = 1;
//MPI_Allreduce(&flag,&equal_size_replicas,1,MPI_INT,MPI_MIN,
// universe->uworld);
// workspace for inter-replica communication via gathers
natoms
=
atom
->
natoms
;
displacements
=
NULL
;
tagall
=
NULL
;
xall
=
NULL
;
imageall
=
NULL
;
if
(
nreplica
!=
nprocs_universe
)
{
displacements
=
new
int
[
nprocs
];
memory
->
create
(
tagall
,
natoms
,
"prd:tagall"
);
memory
->
create
(
xall
,
natoms
,
3
,
"prd:xall"
);
memory
->
create
(
imageall
,
natoms
,
"prd:imageall"
);
}
// random_select = same RNG for each replica, for multiple event selection
// random_clock = same RNG for each replica, for clock updates
// random_dephase = unique RNG for each replica, for dephasing
random_select
=
new
RanPark
(
lmp
,
seed
);
random_clock
=
new
RanPark
(
lmp
,
seed
+
1000
);
random_dephase
=
new
RanMars
(
lmp
,
seed
+
iworld
);
// create ComputeTemp class to monitor temperature
char
**
args
=
new
char
*
[
3
];
args
[
0
]
=
(
char
*
)
"prd_temp"
;
args
[
1
]
=
(
char
*
)
"all"
;
args
[
2
]
=
(
char
*
)
"temp"
;
modify
->
add_compute
(
3
,
args
);
temperature
=
modify
->
compute
[
modify
->
ncompute
-
1
];
// create Velocity class for velocity creation in dephasing
// pass it temperature compute, loop_setting, dist_setting settings
atom
->
check_mass
();
velocity
=
new
Velocity
(
lmp
);
velocity
->
init_external
(
"all"
);
args
[
0
]
=
(
char
*
)
"temp"
;
args
[
1
]
=
(
char
*
)
"prd_temp"
;
velocity
->
options
(
2
,
args
);
args
[
0
]
=
(
char
*
)
"loop"
;
args
[
1
]
=
(
char
*
)
loop_setting
;
if
(
loop_setting
)
velocity
->
options
(
2
,
args
);
args
[
0
]
=
(
char
*
)
"dist"
;
args
[
1
]
=
(
char
*
)
dist_setting
;
if
(
dist_setting
)
velocity
->
options
(
2
,
args
);
// create FixEventPRD class to store event and pre-quench states
args
[
0
]
=
(
char
*
)
"prd_event"
;
args
[
1
]
=
(
char
*
)
"all"
;
args
[
2
]
=
(
char
*
)
"EVENT/PRD"
;
modify
->
add_fix
(
3
,
args
);
fix_event
=
(
FixEventPRD
*
)
modify
->
fix
[
modify
->
nfix
-
1
];
// create Finish for timing output
finish
=
new
Finish
(
lmp
);
// string clean-up
delete
[]
args
;
delete
[]
loop_setting
;
delete
[]
dist_setting
;
// assign FixEventPRD to event-detection compute
// necessary so it will know atom coords at last event
int
icompute
=
modify
->
find_compute
(
id_compute
);
if
(
icompute
<
0
)
error
->
all
(
FLERR
,
"Could not find compute ID for PRD"
);
compute_event
=
modify
->
compute
[
icompute
];
compute_event
->
reset_extra_compute_fix
(
"prd_event"
);
// reset reneighboring criteria since will perform minimizations
neigh_every
=
neighbor
->
every
;
neigh_delay
=
neighbor
->
delay
;
neigh_dist_check
=
neighbor
->
dist_check
;
if
(
neigh_every
!=
1
||
neigh_delay
!=
0
||
neigh_dist_check
!=
1
)
{
if
(
me
==
0
)
error
->
warning
(
FLERR
,
"Resetting reneighboring criteria during PRD"
);
}
neighbor
->
every
=
1
;
neighbor
->
delay
=
0
;
neighbor
->
dist_check
=
1
;
// initialize PRD as if one long dynamics run
update
->
whichflag
=
1
;
update
->
nsteps
=
nsteps
;
update
->
beginstep
=
update
->
firststep
=
update
->
ntimestep
;
update
->
endstep
=
update
->
laststep
=
update
->
firststep
+
nsteps
;
update
->
restrict_output
=
1
;
if
(
update
->
laststep
<
0
)
error
->
all
(
FLERR
,
"Too many timesteps"
);
lmp
->
init
();
// init minimizer settings and minimizer itself
update
->
etol
=
etol
;
update
->
ftol
=
ftol
;
update
->
max_eval
=
maxeval
;
update
->
minimize
->
init
();
// cannot use PRD with a changing box
if
(
domain
->
box_change
)
error
->
all
(
FLERR
,
"Cannot use PRD with a changing box"
);
// cannot use PRD with time-dependent fixes or regions or atom sorting
for
(
int
i
=
0
;
i
<
modify
->
nfix
;
i
++
)
if
(
modify
->
fix
[
i
]
->
time_depend
)
error
->
all
(
FLERR
,
"Cannot use PRD with a time-dependent fix defined"
);
for
(
int
i
=
0
;
i
<
domain
->
nregion
;
i
++
)
if
(
domain
->
regions
[
i
]
->
dynamic_check
())
error
->
all
(
FLERR
,
"Cannot use PRD with a time-dependent region defined"
);
if
(
atom
->
sortfreq
>
0
)
error
->
all
(
FLERR
,
"Cannot use PRD with atom_modify sort enabled"
);
// perform PRD simulation
if
(
me_universe
==
0
&&
universe
->
uscreen
)
fprintf
(
universe
->
uscreen
,
"Setting up PRD ...
\n
"
);
if
(
me_universe
==
0
)
{
if
(
universe
->
uscreen
)
fprintf
(
universe
->
uscreen
,
"Step CPU Clock Event "
"Correlated Coincident Replica
\n
"
);
if
(
universe
->
ulogfile
)
fprintf
(
universe
->
ulogfile
,
"Step CPU Clock Event "
"Correlated Coincident Replica
\n
"
);
}
// store hot state and quenched event for replica 0
// use share_event() to copy that info to all replicas
// this insures all start from same place
// need this line if quench() does only setup_minimal()
// update->minimize->setup();
fix_event
->
store_state_quench
();
quench
();
ncoincident
=
0
;
share_event
(
0
,
0
,
0
);
timer
->
init
();
timer
->
barrier_start
();
time_start
=
timer
->
get_wall
(
Timer
::
TOTAL
);
log_event
();
// do full init/setup since are starting all replicas after event
// replica 0 bcasts temp to all replicas if temp_dephase is not set
update
->
whichflag
=
1
;
lmp
->
init
();
update
->
integrate
->
setup
();
if
(
temp_flag
==
0
)
{
if
(
universe
->
iworld
==
0
)
temp_dephase
=
temperature
->
compute_scalar
();
MPI_Bcast
(
&
temp_dephase
,
1
,
MPI_DOUBLE
,
universe
->
root_proc
[
0
],
universe
->
uworld
);
}
// main loop: look for events until out of time
// (1) dephase independently on each proc after event
// (2) loop: dynamics, store state, quench, check event, restore state
// (3) share and record event
nbuild
=
ndanger
=
0
;
time_dephase
=
time_dynamics
=
time_quench
=
time_comm
=
time_output
=
0.0
;
bigint
clock
=
0
;
timer
->
barrier_start
();
time_start
=
timer
->
get_wall
(
Timer
::
TOTAL
);
int
istep
=
0
;
while
(
istep
<
nsteps
)
{
dephase
();
if
(
stepmode
==
0
)
istep
=
update
->
ntimestep
-
update
->
beginstep
;
else
istep
=
clock
;
ireplica
=
-
1
;
while
(
istep
<
nsteps
)
{
dynamics
(
t_event
,
time_dynamics
);
fix_event
->
store_state_quench
();
quench
();
clock
=
clock
+
t_event
*
universe
->
nworlds
;
ireplica
=
check_event
();
if
(
ireplica
>=
0
)
break
;
fix_event
->
restore_state_quench
();
if
(
stepmode
==
0
)
istep
=
update
->
ntimestep
-
update
->
beginstep
;
else
istep
=
clock
;
}
if
(
ireplica
<
0
)
break
;
// decrement clock by random time at which 1 or more events occurred
int
frac_t_event
=
t_event
;
for
(
int
i
=
0
;
i
<
fix_event
->
ncoincident
;
i
++
)
{
int
frac_rand
=
static_cast
<
int
>
(
random_clock
->
uniform
()
*
t_event
);
frac_t_event
=
MIN
(
frac_t_event
,
frac_rand
);
}
int
decrement
=
(
t_event
-
frac_t_event
)
*
universe
->
nworlds
;
clock
-=
decrement
;
// share event across replicas
// NOTE: would be potentially more efficient for correlated events
// if don't share until correlated check below has completed
// this will complicate the dump (always on replica 0)
share_event
(
ireplica
,
1
,
decrement
);
log_event
();
int
restart_flag
=
0
;
if
(
output
->
restart_flag
&&
universe
->
iworld
==
0
)
{
if
(
output
->
restart_every_single
&&
fix_event
->
event_number
%
output
->
restart_every_single
==
0
)
restart_flag
=
1
;
if
(
output
->
restart_every_double
&&
fix_event
->
event_number
%
output
->
restart_every_double
==
0
)
restart_flag
=
1
;
}
// correlated event loop
// other procs could be dephasing during this time
int
corr_endstep
=
update
->
ntimestep
+
t_corr
;
while
(
update
->
ntimestep
<
corr_endstep
)
{
if
(
update
->
ntimestep
==
update
->
endstep
)
{
restart_flag
=
0
;
break
;
}
dynamics
(
t_event
,
time_dynamics
);
fix_event
->
store_state_quench
();
quench
();
clock
+=
t_event
;
int
corr_event_check
=
check_event
(
ireplica
);
if
(
corr_event_check
>=
0
)
{
share_event
(
ireplica
,
2
,
0
);
log_event
();
corr_endstep
=
update
->
ntimestep
+
t_corr
;
}
else
fix_event
->
restore_state_quench
();
}
// full init/setup since are starting all replicas after event
// event replica bcasts temp to all replicas if temp_dephase is not set
update
->
whichflag
=
1
;
lmp
->
init
();
update
->
integrate
->
setup
();
timer
->
barrier_start
();
if
(
t_corr
>
0
)
replicate
(
ireplica
);
if
(
temp_flag
==
0
)
{
if
(
ireplica
==
universe
->
iworld
)
temp_dephase
=
temperature
->
compute_scalar
();
MPI_Bcast
(
&
temp_dephase
,
1
,
MPI_DOUBLE
,
universe
->
root_proc
[
ireplica
],
universe
->
uworld
);
}
timer
->
barrier_stop
();
time_comm
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
// write restart file of hot coords
if
(
restart_flag
)
{
timer
->
barrier_start
();
output
->
write_restart
(
update
->
ntimestep
);
timer
->
barrier_stop
();
time_output
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
}
if
(
stepmode
==
0
)
istep
=
update
->
ntimestep
-
update
->
beginstep
;
else
istep
=
clock
;
}
if
(
stepmode
)
nsteps
=
update
->
ntimestep
-
update
->
beginstep
;
// set total timers and counters so Finish() will process them
timer
->
set_wall
(
Timer
::
TOTAL
,
time_start
);
timer
->
barrier_stop
();
timer
->
set_wall
(
Timer
::
DEPHASE
,
time_dephase
);
timer
->
set_wall
(
Timer
::
DYNAMICS
,
time_dynamics
);
timer
->
set_wall
(
Timer
::
QUENCH
,
time_quench
);
timer
->
set_wall
(
Timer
::
REPCOMM
,
time_comm
);
timer
->
set_wall
(
Timer
::
REPOUT
,
time_output
);
neighbor
->
ncalls
=
nbuild
;
neighbor
->
ndanger
=
ndanger
;
if
(
me_universe
==
0
)
{
if
(
universe
->
uscreen
)
fprintf
(
universe
->
uscreen
,
"Loop time of %g on %d procs for %d steps with "
BIGINT_FORMAT
" atoms
\n
"
,
timer
->
get_wall
(
Timer
::
TOTAL
),
nprocs_universe
,
nsteps
,
atom
->
natoms
);
if
(
universe
->
ulogfile
)
fprintf
(
universe
->
ulogfile
,
"Loop time of %g on %d procs for %d steps with "
BIGINT_FORMAT
" atoms
\n
"
,
timer
->
get_wall
(
Timer
::
TOTAL
),
nprocs_universe
,
nsteps
,
atom
->
natoms
);
}
if
(
me
==
0
)
{
if
(
screen
)
fprintf
(
screen
,
"
\n
PRD done
\n
"
);
if
(
logfile
)
fprintf
(
logfile
,
"
\n
PRD done
\n
"
);
}
finish
->
end
(
2
);
update
->
whichflag
=
0
;
update
->
firststep
=
update
->
laststep
=
0
;
update
->
beginstep
=
update
->
endstep
=
0
;
update
->
restrict_output
=
0
;
// reset reneighboring criteria
neighbor
->
every
=
neigh_every
;
neighbor
->
delay
=
neigh_delay
;
neighbor
->
dist_check
=
neigh_dist_check
;
// clean up
delete
[]
displacements
;
memory
->
destroy
(
tagall
);
memory
->
destroy
(
xall
);
memory
->
destroy
(
imageall
);
delete
[]
id_compute
;
MPI_Comm_free
(
&
comm_replica
);
delete
random_select
;
delete
random_clock
;
delete
random_dephase
;
delete
velocity
;
delete
finish
;
modify
->
delete_compute
(
"prd_temp"
);
modify
->
delete_fix
(
"prd_event"
);
compute_event
->
reset_extra_compute_fix
(
NULL
);
}
/* ----------------------------------------------------------------------
dephasing = one or more short runs with new random velocities
------------------------------------------------------------------------- */
void
PRD
::
dephase
()
{
bigint
ntimestep_hold
=
update
->
ntimestep
;
// n_dephase iterations of dephasing, each of t_dephase steps
for
(
int
i
=
0
;
i
<
n_dephase
;
i
++
)
{
fix_event
->
store_state_dephase
();
// do not proceed to next iteration until an event-free run occurs
int
done
=
0
;
while
(
!
done
)
{
int
seed
=
static_cast
<
int
>
(
random_dephase
->
uniform
()
*
MAXSMALLINT
);
if
(
seed
==
0
)
seed
=
1
;
velocity
->
create
(
temp_dephase
,
seed
);
dynamics
(
t_dephase
,
time_dephase
);
fix_event
->
store_state_quench
();
quench
();
if
(
compute_event
->
compute_scalar
()
>
0.0
)
{
fix_event
->
restore_state_dephase
();
update
->
ntimestep
-=
t_dephase
;
log_event
();
}
else
{
fix_event
->
restore_state_quench
();
done
=
1
;
}
if
(
temp_flag
==
0
)
temp_dephase
=
temperature
->
compute_scalar
();
}
}
// reset timestep as if dephase did not occur
// clear timestep storage from computes, since now invalid
update
->
ntimestep
=
ntimestep_hold
;
for
(
int
i
=
0
;
i
<
modify
->
ncompute
;
i
++
)
if
(
modify
->
compute
[
i
]
->
timeflag
)
modify
->
compute
[
i
]
->
clearstep
();
}
/* ----------------------------------------------------------------------
short dynamics run: for event search, decorrelation, or dephasing
------------------------------------------------------------------------- */
void
PRD
::
dynamics
(
int
nsteps
,
double
&
time_category
)
{
update
->
whichflag
=
1
;
update
->
nsteps
=
nsteps
;
lmp
->
init
();
update
->
integrate
->
setup
();
// this may be needed if don't do full init
//modify->addstep_compute_all(update->ntimestep);
bigint
ncalls
=
neighbor
->
ncalls
;
timer
->
barrier_start
();
update
->
integrate
->
run
(
nsteps
);
timer
->
barrier_stop
();
time_category
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
nbuild
+=
neighbor
->
ncalls
-
ncalls
;
ndanger
+=
neighbor
->
ndanger
;
update
->
integrate
->
cleanup
();
finish
->
end
(
0
);
}
/* ----------------------------------------------------------------------
quench minimization
------------------------------------------------------------------------- */
void
PRD
::
quench
()
{
bigint
ntimestep_hold
=
update
->
ntimestep
;
bigint
endstep_hold
=
update
->
endstep
;
// need to change whichflag so that minimize->setup() calling
// modify->setup() will call fix->min_setup()
update
->
whichflag
=
2
;
update
->
nsteps
=
maxiter
;
update
->
endstep
=
update
->
laststep
=
update
->
firststep
+
maxiter
;
if
(
update
->
laststep
<
0
)
error
->
all
(
FLERR
,
"Too many iterations"
);
// full init works
lmp
->
init
();
update
->
minimize
->
setup
();
// partial init does not work
//modify->addstep_compute_all(update->ntimestep);
//update->minimize->setup_minimal(1);
int
ncalls
=
neighbor
->
ncalls
;
timer
->
barrier_start
();
update
->
minimize
->
run
(
maxiter
);
timer
->
barrier_stop
();
time_quench
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
if
(
neighbor
->
ncalls
==
ncalls
)
quench_reneighbor
=
0
;
else
quench_reneighbor
=
1
;
update
->
minimize
->
cleanup
();
finish
->
end
(
0
);
// reset timestep as if quench did not occur
// clear timestep storage from computes, since now invalid
update
->
ntimestep
=
ntimestep_hold
;
update
->
endstep
=
update
->
laststep
=
endstep_hold
;
for
(
int
i
=
0
;
i
<
modify
->
ncompute
;
i
++
)
if
(
modify
->
compute
[
i
]
->
timeflag
)
modify
->
compute
[
i
]
->
clearstep
();
}
/* ----------------------------------------------------------------------
check for an event in any replica
if replica_num is non-negative only check for event on replica_num
if multiple events, choose one at random
return -1 if no event
else return ireplica = world in which event occured
------------------------------------------------------------------------- */
int
PRD
::
check_event
(
int
replica_num
)
{
int
worldflag
,
universeflag
,
scanflag
,
replicaflag
,
ireplica
;
worldflag
=
0
;
if
(
compute_event
->
compute_scalar
()
>
0.0
)
worldflag
=
1
;
if
(
replica_num
>=
0
&&
replica_num
!=
universe
->
iworld
)
worldflag
=
0
;
timer
->
barrier_start
();
if
(
me
==
0
)
MPI_Allreduce
(
&
worldflag
,
&
universeflag
,
1
,
MPI_INT
,
MPI_SUM
,
comm_replica
);
MPI_Bcast
(
&
universeflag
,
1
,
MPI_INT
,
0
,
world
);
ncoincident
=
universeflag
;
if
(
!
universeflag
)
ireplica
=
-
1
;
else
{
// multiple events, choose one at random
// iwhich = random # from 1 to N, N = # of events to choose from
// scanflag = 1 to N on replicas with an event, 0 on non-event replicas
// exit with worldflag = 1 on chosen replica, 0 on all others
// note worldflag is already 0 on replicas that didn't perform event
if
(
universeflag
>
1
)
{
int
iwhich
=
static_cast
<
int
>
(
universeflag
*
random_select
->
uniform
())
+
1
;
if
(
me
==
0
)
MPI_Scan
(
&
worldflag
,
&
scanflag
,
1
,
MPI_INT
,
MPI_SUM
,
comm_replica
);
MPI_Bcast
(
&
scanflag
,
1
,
MPI_INT
,
0
,
world
);
if
(
scanflag
!=
iwhich
)
worldflag
=
0
;
}
if
(
worldflag
)
replicaflag
=
universe
->
iworld
;
else
replicaflag
=
0
;
if
(
me
==
0
)
MPI_Allreduce
(
&
replicaflag
,
&
ireplica
,
1
,
MPI_INT
,
MPI_SUM
,
comm_replica
);
MPI_Bcast
(
&
ireplica
,
1
,
MPI_INT
,
0
,
world
);
}
timer
->
barrier_stop
();
time_comm
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
return
ireplica
;
}
/* ----------------------------------------------------------------------
share quenched and hot coords owned by ireplica with all replicas
all replicas store event in fix_event
replica 0 dumps event snapshot
flag = 0 = called before PRD run
flag = 1 = called during PRD run = not correlated event
flag = 2 = called during PRD run = correlated event
------------------------------------------------------------------------- */
void
PRD
::
share_event
(
int
ireplica
,
int
flag
,
int
decrement
)
{
timer
->
barrier_start
();
// communicate quenched coords to all replicas and store as event
// decrement event counter if flag = 0 since not really an event
replicate
(
ireplica
);
timer
->
barrier_stop
();
time_comm
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
// adjust time for last correlated event check (not on first event)
int
corr_adjust
=
t_corr
;
if
(
fix_event
->
event_number
<
1
||
flag
==
2
)
corr_adjust
=
0
;
// delta = time since last correlated event check
int
delta
=
update
->
ntimestep
-
fix_event
->
event_timestep
-
corr_adjust
;
// if this is a correlated event, time elapsed only on one partition
if
(
flag
!=
2
)
delta
*=
universe
->
nworlds
;
if
(
delta
>
0
&&
flag
!=
2
)
delta
-=
decrement
;
delta
+=
corr_adjust
;
// delta passed to store_event_prd() should make its clock update
// be consistent with clock in main PRD loop
// don't change the clock or timestep if this is a restart
if
(
flag
==
0
&&
fix_event
->
event_number
!=
0
)
fix_event
->
store_event_prd
(
fix_event
->
event_timestep
,
0
);
else
{
fix_event
->
store_event_prd
(
update
->
ntimestep
,
delta
);
fix_event
->
replica_number
=
ireplica
;
fix_event
->
correlated_event
=
0
;
if
(
flag
==
2
)
fix_event
->
correlated_event
=
1
;
fix_event
->
ncoincident
=
ncoincident
;
}
if
(
flag
==
0
)
fix_event
->
event_number
--
;
// dump snapshot of quenched coords, only on replica 0
// must reneighbor and compute forces before dumping
// since replica 0 possibly has new state from another replica
// addstep_compute_all insures eng/virial are calculated if needed
if
(
output
->
ndump
&&
universe
->
iworld
==
0
)
{
timer
->
barrier_start
();
modify
->
addstep_compute_all
(
update
->
ntimestep
);
update
->
integrate
->
setup_minimal
(
1
);
output
->
write_dump
(
update
->
ntimestep
);
timer
->
barrier_stop
();
time_output
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
}
// restore and communicate hot coords to all replicas
fix_event
->
restore_state_quench
();
timer
->
barrier_start
();
replicate
(
ireplica
);
timer
->
barrier_stop
();
time_comm
+=
timer
->
get_wall
(
Timer
::
TOTAL
);
}
/* ----------------------------------------------------------------------
universe proc 0 prints event info
------------------------------------------------------------------------- */
void
PRD
::
log_event
()
{
timer
->
set_wall
(
Timer
::
TOTAL
,
time_start
);
if
(
universe
->
me
==
0
)
{
if
(
universe
->
uscreen
)
fprintf
(
universe
->
uscreen
,
BIGINT_FORMAT
" %.3f "
BIGINT_FORMAT
" %d %d %d %d
\n
"
,
fix_event
->
event_timestep
,
timer
->
elapsed
(
Timer
::
TOTAL
),
fix_event
->
clock
,
fix_event
->
event_number
,
fix_event
->
correlated_event
,
fix_event
->
ncoincident
,
fix_event
->
replica_number
);
if
(
universe
->
ulogfile
)
fprintf
(
universe
->
ulogfile
,
BIGINT_FORMAT
" %.3f "
BIGINT_FORMAT
" %d %d %d %d
\n
"
,
fix_event
->
event_timestep
,
timer
->
elapsed
(
Timer
::
TOTAL
),
fix_event
->
clock
,
fix_event
->
event_number
,
fix_event
->
correlated_event
,
fix_event
->
ncoincident
,
fix_event
->
replica_number
);
}
}
/* ----------------------------------------------------------------------
communicate atom coords and image flags in ireplica to all other replicas
one proc per replica:
direct overwrite via bcast
else atoms could be stored in different order or on different procs:
collect to root proc of event replica
bcast to roots of other replicas
bcast within each replica
each proc extracts info for atoms it owns using atom IDs
------------------------------------------------------------------------- */
void
PRD
::
replicate
(
int
ireplica
)
{
int
nreplica
=
universe
->
nworlds
;
int
nprocs_universe
=
universe
->
nprocs
;
int
i
,
m
;
if
(
nreplica
==
nprocs_universe
)
{
MPI_Bcast
(
atom
->
image
,
atom
->
nlocal
,
MPI_INT
,
ireplica
,
comm_replica
);
MPI_Bcast
(
atom
->
x
[
0
],
3
*
atom
->
nlocal
,
MPI_DOUBLE
,
ireplica
,
comm_replica
);
}
else
{
int
*
counts
=
new
int
[
nprocs
];
if
(
universe
->
iworld
==
ireplica
)
{
MPI_Gather
(
&
atom
->
nlocal
,
1
,
MPI_INT
,
counts
,
1
,
MPI_INT
,
0
,
world
);
displacements
[
0
]
=
0
;
for
(
i
=
0
;
i
<
nprocs
-
1
;
i
++
)
displacements
[
i
+
1
]
=
displacements
[
i
]
+
counts
[
i
];
MPI_Gatherv
(
atom
->
tag
,
atom
->
nlocal
,
MPI_LMP_TAGINT
,
tagall
,
counts
,
displacements
,
MPI_LMP_TAGINT
,
0
,
world
);
MPI_Gatherv
(
atom
->
image
,
atom
->
nlocal
,
MPI_INT
,
imageall
,
counts
,
displacements
,
MPI_INT
,
0
,
world
);
for
(
i
=
0
;
i
<
nprocs
;
i
++
)
counts
[
i
]
*=
3
;
for
(
i
=
0
;
i
<
nprocs
-
1
;
i
++
)
displacements
[
i
+
1
]
=
displacements
[
i
]
+
counts
[
i
];
MPI_Gatherv
(
atom
->
x
[
0
],
3
*
atom
->
nlocal
,
MPI_DOUBLE
,
xall
[
0
],
counts
,
displacements
,
MPI_DOUBLE
,
0
,
world
);
}
if
(
me
==
0
)
{
MPI_Bcast
(
tagall
,
natoms
,
MPI_INT
,
ireplica
,
comm_replica
);
MPI_Bcast
(
imageall
,
natoms
,
MPI_INT
,
ireplica
,
comm_replica
);
MPI_Bcast
(
xall
[
0
],
3
*
natoms
,
MPI_DOUBLE
,
ireplica
,
comm_replica
);
}
MPI_Bcast
(
tagall
,
natoms
,
MPI_INT
,
0
,
world
);
MPI_Bcast
(
imageall
,
natoms
,
MPI_INT
,
0
,
world
);
MPI_Bcast
(
xall
[
0
],
3
*
natoms
,
MPI_DOUBLE
,
0
,
world
);
double
**
x
=
atom
->
x
;
int
nlocal
=
atom
->
nlocal
;
for
(
i
=
0
;
i
<
natoms
;
i
++
)
{
m
=
atom
->
map
(
tagall
[
i
]);
if
(
m
>=
0
&&
m
<
nlocal
)
{
x
[
m
][
0
]
=
xall
[
i
][
0
];
x
[
m
][
1
]
=
xall
[
i
][
1
];
x
[
m
][
2
]
=
xall
[
i
][
2
];
atom
->
image
[
m
]
=
imageall
[
i
];
}
}
delete
[]
counts
;
}
}
/* ----------------------------------------------------------------------
parse optional parameters at end of PRD input line
------------------------------------------------------------------------- */
void
PRD
::
options
(
int
narg
,
char
**
arg
)
{
if
(
narg
<
0
)
error
->
all
(
FLERR
,
"Illegal prd command"
);
// set defaults
etol
=
0.1
;
ftol
=
0.1
;
maxiter
=
40
;
maxeval
=
50
;
temp_flag
=
0
;
stepmode
=
0
;
char
*
str
=
(
char
*
)
"geom"
;
int
n
=
strlen
(
str
)
+
1
;
loop_setting
=
new
char
[
n
];
strcpy
(
loop_setting
,
str
);
str
=
(
char
*
)
"gaussian"
;
n
=
strlen
(
str
)
+
1
;
dist_setting
=
new
char
[
n
];
strcpy
(
dist_setting
,
str
);
int
iarg
=
0
;
while
(
iarg
<
narg
)
{
if
(
strcmp
(
arg
[
iarg
],
"min"
)
==
0
)
{
if
(
iarg
+
5
>
narg
)
error
->
all
(
FLERR
,
"Illegal prd command"
);
etol
=
force
->
numeric
(
FLERR
,
arg
[
iarg
+
1
]);
ftol
=
force
->
numeric
(
FLERR
,
arg
[
iarg
+
2
]);
maxiter
=
force
->
inumeric
(
FLERR
,
arg
[
iarg
+
3
]);
maxeval
=
force
->
inumeric
(
FLERR
,
arg
[
iarg
+
4
]);
if
(
maxiter
<
0
)
error
->
all
(
FLERR
,
"Illegal prd command"
);
iarg
+=
5
;
}
else
if
(
strcmp
(
arg
[
iarg
],
"temp"
)
==
0
)
{
if
(
iarg
+
2
>
narg
)
error
->
all
(
FLERR
,
"Illegal prd command"
);
temp_flag
=
1
;
temp_dephase
=
force
->
numeric
(
FLERR
,
arg
[
iarg
+
1
]);
if
(
temp_dephase
<=
0.0
)
error
->
all
(
FLERR
,
"Illegal prd command"
);
iarg
+=
2
;
}
else
if
(
strcmp
(
arg
[
iarg
],
"vel"
)
==
0
)
{
if
(
iarg
+
3
>
narg
)
error
->
all
(
FLERR
,
"Illegal prd command"
);
delete
[]
loop_setting
;
delete
[]
dist_setting
;
if
(
strcmp
(
arg
[
iarg
+
1
],
"all"
)
==
0
)
loop_setting
=
NULL
;
else
if
(
strcmp
(
arg
[
iarg
+
1
],
"local"
)
==
0
)
loop_setting
=
NULL
;
else
if
(
strcmp
(
arg
[
iarg
+
1
],
"geom"
)
==
0
)
loop_setting
=
NULL
;
else
error
->
all
(
FLERR
,
"Illegal prd command"
);
int
n
=
strlen
(
arg
[
iarg
+
1
])
+
1
;
loop_setting
=
new
char
[
n
];
strcpy
(
loop_setting
,
arg
[
iarg
+
1
]);
if
(
strcmp
(
arg
[
iarg
+
2
],
"uniform"
)
==
0
)
dist_setting
=
NULL
;
else
if
(
strcmp
(
arg
[
iarg
+
2
],
"gaussian"
)
==
0
)
dist_setting
=
NULL
;
else
error
->
all
(
FLERR
,
"Illegal prd command"
);
n
=
strlen
(
arg
[
iarg
+
2
])
+
1
;
dist_setting
=
new
char
[
n
];
strcpy
(
dist_setting
,
arg
[
iarg
+
2
]);
iarg
+=
3
;
}
else
if
(
strcmp
(
arg
[
iarg
],
"time"
)
==
0
)
{
if
(
iarg
+
2
>
narg
)
error
->
all
(
FLERR
,
"Illegal prd command"
);
if
(
strcmp
(
arg
[
iarg
+
1
],
"steps"
)
==
0
)
stepmode
=
0
;
else
if
(
strcmp
(
arg
[
iarg
+
1
],
"clock"
)
==
0
)
stepmode
=
1
;
else
error
->
all
(
FLERR
,
"Illegal prd command"
);
iarg
+=
2
;
}
else
error
->
all
(
FLERR
,
"Illegal prd command"
);
}
}
Event Timeline
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