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38 * \brief Declares the loop for MiMiC QM/MM
40 * \author Viacheslav Bolnykh <v.bolnykh@hpc-leap.eu>
41 * \ingroup module_mdrun
53 #include "gromacs/awh/awh.h"
54 #include "gromacs/commandline/filenm.h"
55 #include "gromacs/domdec/collect.h"
56 #include "gromacs/domdec/dlbtiming.h"
57 #include "gromacs/domdec/domdec.h"
58 #include "gromacs/domdec/domdec_network.h"
59 #include "gromacs/domdec/domdec_struct.h"
60 #include "gromacs/domdec/mdsetup.h"
61 #include "gromacs/domdec/partition.h"
62 #include "gromacs/essentialdynamics/edsam.h"
63 #include "gromacs/ewald/pme.h"
64 #include "gromacs/ewald/pme_load_balancing.h"
65 #include "gromacs/fileio/trxio.h"
66 #include "gromacs/gmxlib/network.h"
67 #include "gromacs/gmxlib/nrnb.h"
68 #include "gromacs/gpu_utils/gpu_utils.h"
69 #include "gromacs/listed_forces/manage_threading.h"
70 #include "gromacs/math/functions.h"
71 #include "gromacs/math/utilities.h"
72 #include "gromacs/math/vec.h"
73 #include "gromacs/math/vectypes.h"
74 #include "gromacs/mdlib/checkpointhandler.h"
75 #include "gromacs/mdlib/compute_io.h"
76 #include "gromacs/mdlib/constr.h"
77 #include "gromacs/mdlib/ebin.h"
78 #include "gromacs/mdlib/enerdata_utils.h"
79 #include "gromacs/mdlib/energyoutput.h"
80 #include "gromacs/mdlib/expanded.h"
81 #include "gromacs/mdlib/force.h"
82 #include "gromacs/mdlib/force_flags.h"
83 #include "gromacs/mdlib/forcerec.h"
84 #include "gromacs/mdlib/md_support.h"
85 #include "gromacs/mdlib/mdatoms.h"
86 #include "gromacs/mdlib/mdoutf.h"
87 #include "gromacs/mdlib/membed.h"
88 #include "gromacs/mdlib/resethandler.h"
89 #include "gromacs/mdlib/sighandler.h"
90 #include "gromacs/mdlib/simulationsignal.h"
91 #include "gromacs/mdlib/stat.h"
92 #include "gromacs/mdlib/stophandler.h"
93 #include "gromacs/mdlib/tgroup.h"
94 #include "gromacs/mdlib/trajectory_writing.h"
95 #include "gromacs/mdlib/update.h"
96 #include "gromacs/mdlib/vcm.h"
97 #include "gromacs/mdlib/vsite.h"
98 #include "gromacs/mdrunutility/handlerestart.h"
99 #include "gromacs/mdrunutility/multisim.h"
100 #include "gromacs/mdrunutility/printtime.h"
101 #include "gromacs/mdtypes/awh_history.h"
102 #include "gromacs/mdtypes/awh_params.h"
103 #include "gromacs/mdtypes/commrec.h"
104 #include "gromacs/mdtypes/df_history.h"
105 #include "gromacs/mdtypes/enerdata.h"
106 #include "gromacs/mdtypes/energyhistory.h"
107 #include "gromacs/mdtypes/fcdata.h"
108 #include "gromacs/mdtypes/forcerec.h"
109 #include "gromacs/mdtypes/group.h"
110 #include "gromacs/mdtypes/inputrec.h"
111 #include "gromacs/mdtypes/interaction_const.h"
112 #include "gromacs/mdtypes/md_enums.h"
113 #include "gromacs/mdtypes/mdatom.h"
114 #include "gromacs/mdtypes/mdrunoptions.h"
115 #include "gromacs/mdtypes/observableshistory.h"
116 #include "gromacs/mdtypes/state.h"
117 #include "gromacs/mimic/communicator.h"
118 #include "gromacs/mimic/utilities.h"
119 #include "gromacs/pbcutil/mshift.h"
120 #include "gromacs/pbcutil/pbc.h"
121 #include "gromacs/pulling/pull.h"
122 #include "gromacs/timing/wallcycle.h"
123 #include "gromacs/timing/walltime_accounting.h"
124 #include "gromacs/topology/atoms.h"
125 #include "gromacs/topology/idef.h"
126 #include "gromacs/topology/mtop_util.h"
127 #include "gromacs/topology/topology.h"
128 #include "gromacs/trajectory/trajectoryframe.h"
129 #include "gromacs/utility/basedefinitions.h"
130 #include "gromacs/utility/cstringutil.h"
131 #include "gromacs/utility/fatalerror.h"
132 #include "gromacs/utility/logger.h"
133 #include "gromacs/utility/real.h"
134 #include "gromacs/utility/smalloc.h"
136 #include "legacysimulator.h"
137 #include "replicaexchange.h"
140 using gmx::SimulationSignaller
;
142 void gmx::LegacySimulator::do_mimic()
144 t_inputrec
* ir
= inputrec
;
145 int64_t step
, step_rel
;
146 double t
, lam0
[efptNR
];
147 bool isLastStep
= false;
148 bool doFreeEnergyPerturbation
= false;
149 unsigned int force_flags
;
150 tensor force_vir
, shake_vir
, total_vir
, pres
;
153 PaddedHostVector
<gmx::RVec
> f
{};
154 gmx_global_stat_t gstat
;
155 t_graph
* graph
= nullptr;
156 gmx_shellfc_t
* shellfc
;
160 /* Domain decomposition could incorrectly miss a bonded
161 interaction, but checking for that requires a global
162 communication stage, which does not otherwise happen in DD
163 code. So we do that alongside the first global energy reduction
164 after a new DD is made. These variables handle whether the
165 check happens, and the result it returns. */
166 bool shouldCheckNumberOfBondedInteractions
= false;
167 int totalNumberOfBondedInteractions
= -1;
169 SimulationSignals signals
;
170 // Most global communnication stages don't propagate mdrun
171 // signals, and will use this object to achieve that.
172 SimulationSignaller
nullSignaller(nullptr, nullptr, nullptr, false, false);
176 gmx_fatal(FARGS
, "Expanded ensemble not supported by MiMiC.");
180 gmx_fatal(FARGS
, "Simulated tempering not supported by MiMiC.");
184 gmx_fatal(FARGS
, "AWH not supported by MiMiC.");
186 if (replExParams
.exchangeInterval
> 0)
188 gmx_fatal(FARGS
, "Replica exchange not supported by MiMiC.");
190 if (opt2bSet("-ei", nfile
, fnm
) || observablesHistory
->edsamHistory
!= nullptr)
192 gmx_fatal(FARGS
, "Essential dynamics not supported by MiMiC.");
196 gmx_fatal(FARGS
, "Interactive MD not supported by MiMiC.");
200 gmx_fatal(FARGS
, "Multiple simulations not supported by MiMiC.");
202 if (std::any_of(ir
->opts
.annealing
, ir
->opts
.annealing
+ ir
->opts
.ngtc
,
203 [](int i
) { return i
!= eannNO
; }))
205 gmx_fatal(FARGS
, "Simulated annealing not supported by MiMiC.");
208 /* Settings for rerun */
210 ir
->nstcalcenergy
= 1;
211 int nstglobalcomm
= 1;
212 const bool bNS
= true;
214 // Communicator to interact with MiMiC
215 MimicCommunicator mimicCommunicator
{};
218 mimicCommunicator
.init();
219 mimicCommunicator
.sendInitData(top_global
, state_global
->x
);
220 ir
->nsteps
= mimicCommunicator
.getStepNumber();
223 ir
->nstxout_compressed
= 0;
224 SimulationGroups
* groups
= &top_global
->groups
;
225 top_global
->intermolecularExclusionGroup
= genQmmmIndices(*top_global
);
227 initialize_lambdas(fplog
, *ir
, MASTER(cr
), &state_global
->fep_state
, state_global
->lambda
, lam0
);
229 const bool simulationsShareState
= false;
230 gmx_mdoutf
* outf
= init_mdoutf(fplog
, nfile
, fnm
, mdrunOptions
, cr
, outputProvider
,
231 mdModulesNotifier
, ir
, top_global
, oenv
, wcycle
,
232 StartingBehavior::NewSimulation
, simulationsShareState
, ms
);
233 gmx::EnergyOutput
energyOutput(mdoutf_get_fp_ene(outf
), top_global
, ir
, pull_work
,
234 mdoutf_get_fp_dhdl(outf
), true, StartingBehavior::NewSimulation
,
237 gstat
= global_stat_init(ir
);
239 /* Check for polarizable models and flexible constraints */
240 shellfc
= init_shell_flexcon(fplog
, top_global
, constr
? constr
->numFlexibleConstraints() : 0,
241 ir
->nstcalcenergy
, DOMAINDECOMP(cr
));
244 double io
= compute_io(ir
, top_global
->natoms
, *groups
, energyOutput
.numEnergyTerms(), 1);
245 if ((io
> 2000) && MASTER(cr
))
247 fprintf(stderr
, "\nWARNING: This run will generate roughly %.0f Mb of data\n\n", io
);
251 // Local state only becomes valid now.
252 std::unique_ptr
<t_state
> stateInstance
;
255 if (DOMAINDECOMP(cr
))
257 dd_init_local_top(*top_global
, &top
);
259 stateInstance
= std::make_unique
<t_state
>();
260 state
= stateInstance
.get();
261 dd_init_local_state(cr
->dd
, state_global
, state
);
263 /* Distribute the charge groups over the nodes from the master node */
264 dd_partition_system(fplog
, mdlog
, ir
->init_step
, cr
, TRUE
, 1, state_global
, *top_global
, ir
,
265 imdSession
, pull_work
, state
, &f
, mdAtoms
, &top
, fr
, vsite
, constr
,
266 nrnb
, nullptr, FALSE
);
267 shouldCheckNumberOfBondedInteractions
= true;
268 gmx_bcast(sizeof(ir
->nsteps
), &ir
->nsteps
, cr
);
272 state_change_natoms(state_global
, state_global
->natoms
);
273 /* We need to allocate one element extra, since we might use
274 * (unaligned) 4-wide SIMD loads to access rvec entries.
276 f
.resizeWithPadding(state_global
->natoms
);
277 /* Copy the pointer to the global state */
278 state
= state_global
;
280 mdAlgorithmsSetupAtomData(cr
, ir
, *top_global
, &top
, fr
, &graph
, mdAtoms
, constr
, vsite
, shellfc
);
283 auto mdatoms
= mdAtoms
->mdatoms();
285 // NOTE: The global state is no longer used at this point.
286 // But state_global is still used as temporary storage space for writing
287 // the global state to file and potentially for replica exchange.
288 // (Global topology should persist.)
290 update_mdatoms(mdatoms
, state
->lambda
[efptMASS
]);
292 if (ir
->efep
!= efepNO
&& ir
->fepvals
->nstdhdl
!= 0)
294 doFreeEnergyPerturbation
= true;
300 | (shouldCheckNumberOfBondedInteractions
? CGLO_CHECK_NUMBER_OF_BONDED_INTERACTIONS
: 0));
301 bool bSumEkinhOld
= false;
302 t_vcm
* vcm
= nullptr;
303 compute_globals(gstat
, cr
, ir
, fr
, ekind
, state
->x
.rvec_array(), state
->v
.rvec_array(),
304 state
->box
, state
->lambda
[efptVDW
], mdatoms
, nrnb
, vcm
, nullptr, enerd
,
305 force_vir
, shake_vir
, total_vir
, pres
, mu_tot
, constr
, &nullSignaller
,
306 state
->box
, &totalNumberOfBondedInteractions
, &bSumEkinhOld
, cglo_flags
);
308 checkNumberOfBondedInteractions(mdlog
, cr
, totalNumberOfBondedInteractions
, top_global
, &top
,
309 state
->x
.rvec_array(), state
->box
,
310 &shouldCheckNumberOfBondedInteractions
);
314 fprintf(stderr
, "starting MiMiC MD run '%s'\n\n", *(top_global
->name
));
315 if (mdrunOptions
.verbose
)
318 "Calculated time to finish depends on nsteps from "
319 "run input file,\nwhich may not correspond to the time "
320 "needed to process input trajectory.\n\n");
322 fprintf(fplog
, "\n");
325 walltime_accounting_start_time(walltime_accounting
);
326 wallcycle_start(wcycle
, ewcRUN
);
327 print_start(fplog
, cr
, walltime_accounting
, "mdrun");
329 /***********************************************************
333 ************************************************************/
340 "Simulations has constraints. Constraints will "
341 "be handled by CPMD.");
347 "MiMiC does not report kinetic energy, total energy, temperature, virial and "
350 step
= ir
->init_step
;
353 auto stopHandler
= stopHandlerBuilder
->getStopHandlerMD(
354 compat::not_null
<SimulationSignal
*>(&signals
[eglsSTOPCOND
]), false, MASTER(cr
),
355 ir
->nstlist
, mdrunOptions
.reproducible
, nstglobalcomm
, mdrunOptions
.maximumHoursToRun
,
356 ir
->nstlist
== 0, fplog
, step
, bNS
, walltime_accounting
);
358 // we don't do counter resetting in rerun - finish will always be valid
359 walltime_accounting_set_valid_finish(walltime_accounting
);
361 const DDBalanceRegionHandler
ddBalanceRegionHandler(cr
);
363 /* and stop now if we should */
364 isLastStep
= (isLastStep
|| (ir
->nsteps
>= 0 && step_rel
> ir
->nsteps
));
367 isLastStep
= (isLastStep
|| (ir
->nsteps
>= 0 && step_rel
== ir
->nsteps
));
368 wallcycle_start(wcycle
, ewcSTEP
);
374 mimicCommunicator
.getCoords(&state_global
->x
, state_global
->natoms
);
377 if (ir
->efep
!= efepNO
)
379 setCurrentLambdasLocal(step
, ir
->fepvals
, lam0
, state
->lambda
, state
->fep_state
);
384 const bool constructVsites
= ((vsite
!= nullptr) && mdrunOptions
.rerunConstructVsites
);
385 if (constructVsites
&& DOMAINDECOMP(cr
))
388 "Vsite recalculation with -rerun is not implemented with domain "
390 "use a single rank");
394 if (DOMAINDECOMP(cr
))
396 /* Repartition the domain decomposition */
397 const bool bMasterState
= true;
398 dd_partition_system(fplog
, mdlog
, step
, cr
, bMasterState
, nstglobalcomm
, state_global
,
399 *top_global
, ir
, imdSession
, pull_work
, state
, &f
, mdAtoms
, &top
,
400 fr
, vsite
, constr
, nrnb
, wcycle
, mdrunOptions
.verbose
);
401 shouldCheckNumberOfBondedInteractions
= true;
406 energyOutput
.printHeader(fplog
, step
, t
); /* can we improve the information printed here? */
409 if (ir
->efep
!= efepNO
)
411 update_mdatoms(mdatoms
, state
->lambda
[efptMASS
]);
414 force_flags
= (GMX_FORCE_STATECHANGED
| GMX_FORCE_DYNAMICBOX
| GMX_FORCE_ALLFORCES
415 | GMX_FORCE_VIRIAL
| // TODO: Get rid of this once #2649 is solved
416 GMX_FORCE_ENERGY
| (doFreeEnergyPerturbation
? GMX_FORCE_DHDL
: 0));
420 /* Now is the time to relax the shells */
421 relax_shell_flexcon(fplog
, cr
, ms
, mdrunOptions
.verbose
, enforcedRotation
, step
, ir
,
422 imdSession
, pull_work
, bNS
, force_flags
, &top
, constr
, enerd
, fcd
,
423 state
->natoms
, state
->x
.arrayRefWithPadding(),
424 state
->v
.arrayRefWithPadding(), state
->box
, state
->lambda
, &state
->hist
,
425 f
.arrayRefWithPadding(), force_vir
, mdatoms
, nrnb
, wcycle
, graph
,
426 shellfc
, fr
, runScheduleWork
, t
, mu_tot
, vsite
, ddBalanceRegionHandler
);
430 /* The coordinates (x) are shifted (to get whole molecules)
432 * This is parallellized as well, and does communication too.
433 * Check comments in sim_util.c
436 gmx_edsam
* ed
= nullptr;
437 do_force(fplog
, cr
, ms
, ir
, awh
, enforcedRotation
, imdSession
, pull_work
, step
, nrnb
,
438 wcycle
, &top
, state
->box
, state
->x
.arrayRefWithPadding(), &state
->hist
,
439 f
.arrayRefWithPadding(), force_vir
, mdatoms
, enerd
, fcd
, state
->lambda
, graph
,
440 fr
, runScheduleWork
, vsite
, mu_tot
, t
, ed
, GMX_FORCE_NS
| force_flags
,
441 ddBalanceRegionHandler
);
444 /* Now we have the energies and forces corresponding to the
445 * coordinates at time t.
448 const bool isCheckpointingStep
= false;
449 const bool doRerun
= false;
450 const bool bSumEkinhOld
= false;
451 do_md_trajectory_writing(fplog
, cr
, nfile
, fnm
, step
, step_rel
, t
, ir
, state
,
452 state_global
, observablesHistory
, top_global
, fr
, outf
,
453 energyOutput
, ekind
, f
, isCheckpointingStep
, doRerun
,
454 isLastStep
, mdrunOptions
.writeConfout
, bSumEkinhOld
);
457 stopHandler
->setSignal();
461 /* Need to unshift here */
462 unshift_self(graph
, state
->box
, as_rvec_array(state
->x
.data()));
465 if (vsite
!= nullptr)
467 wallcycle_start(wcycle
, ewcVSITECONSTR
);
468 if (graph
!= nullptr)
470 shift_self(graph
, state
->box
, as_rvec_array(state
->x
.data()));
472 construct_vsites(vsite
, as_rvec_array(state
->x
.data()), ir
->delta_t
,
473 as_rvec_array(state
->v
.data()), top
.idef
.iparams
, top
.idef
.il
,
474 fr
->ePBC
, fr
->bMolPBC
, cr
, state
->box
);
476 if (graph
!= nullptr)
478 unshift_self(graph
, state
->box
, as_rvec_array(state
->x
.data()));
480 wallcycle_stop(wcycle
, ewcVSITECONSTR
);
484 const bool doInterSimSignal
= false;
485 const bool doIntraSimSignal
= true;
486 bool bSumEkinhOld
= false;
487 t_vcm
* vcm
= nullptr;
488 SimulationSignaller
signaller(&signals
, cr
, ms
, doInterSimSignal
, doIntraSimSignal
);
490 compute_globals(gstat
, cr
, ir
, fr
, ekind
, state
->x
.rvec_array(), state
->v
.rvec_array(),
491 state
->box
, state
->lambda
[efptVDW
], mdatoms
, nrnb
, vcm
, wcycle
, enerd
,
492 nullptr, nullptr, nullptr, nullptr, mu_tot
, constr
, &signaller
,
493 state
->box
, &totalNumberOfBondedInteractions
, &bSumEkinhOld
,
494 CGLO_GSTAT
| CGLO_ENERGY
495 | (shouldCheckNumberOfBondedInteractions
? CGLO_CHECK_NUMBER_OF_BONDED_INTERACTIONS
497 checkNumberOfBondedInteractions(mdlog
, cr
, totalNumberOfBondedInteractions
, top_global
,
498 &top
, state
->x
.rvec_array(), state
->box
,
499 &shouldCheckNumberOfBondedInteractions
);
503 gmx::HostVector
<gmx::RVec
> fglobal(top_global
->natoms
);
504 gmx::ArrayRef
<gmx::RVec
> ftemp
;
505 gmx::ArrayRef
<const gmx::RVec
> flocal
= gmx::makeArrayRef(f
);
506 if (DOMAINDECOMP(cr
))
508 ftemp
= gmx::makeArrayRef(fglobal
);
509 dd_collect_vec(cr
->dd
, state
, flocal
, ftemp
);
513 ftemp
= gmx::makeArrayRef(f
);
518 mimicCommunicator
.sendEnergies(enerd
->term
[F_EPOT
]);
519 mimicCommunicator
.sendForces(ftemp
, state_global
->natoms
);
524 /* Note: this is OK, but there are some numerical precision issues with using the convergence of
525 the virial that should probably be addressed eventually. state->veta has better properies,
526 but what we actually need entering the new cycle is the new shake_vir value. Ideally, we could
527 generate the new shake_vir, but test the veta value for convergence. This will take some thought. */
529 if (ir
->efep
!= efepNO
)
531 /* Sum up the foreign energy and dhdl terms for md and sd.
532 Currently done every step so that dhdl is correct in the .edr */
533 sum_dhdl(enerd
, state
->lambda
, *ir
->fepvals
);
539 const bool bCalcEnerStep
= true;
540 energyOutput
.addDataAtEnergyStep(doFreeEnergyPerturbation
, bCalcEnerStep
, t
,
541 mdatoms
->tmass
, enerd
, state
, ir
->fepvals
,
542 ir
->expandedvals
, state
->box
, shake_vir
, force_vir
,
543 total_vir
, pres
, ekind
, mu_tot
, constr
);
545 const bool do_ene
= true;
546 const bool do_log
= true;
548 const bool do_dr
= ir
->nstdisreout
!= 0;
549 const bool do_or
= ir
->nstorireout
!= 0;
551 energyOutput
.printAnnealingTemperatures(do_log
? fplog
: nullptr, groups
, &(ir
->opts
));
552 energyOutput
.printStepToEnergyFile(mdoutf_get_fp_ene(outf
), do_ene
, do_dr
, do_or
,
553 do_log
? fplog
: nullptr, step
, t
, fcd
, awh
);
555 if (do_per_step(step
, ir
->nstlog
))
557 if (fflush(fplog
) != 0)
559 gmx_fatal(FARGS
, "Cannot flush logfile - maybe you are out of disk space?");
564 /* Print the remaining wall clock time for the run */
565 if (isMasterSimMasterRank(ms
, MASTER(cr
)) && (mdrunOptions
.verbose
|| gmx_got_usr_signal()))
569 fprintf(stderr
, "\n");
571 print_time(stderr
, walltime_accounting
, step
, ir
, cr
);
574 cycles
= wallcycle_stop(wcycle
, ewcSTEP
);
575 if (DOMAINDECOMP(cr
) && wcycle
)
577 dd_cycles_add(cr
->dd
, cycles
, ddCyclStep
);
580 /* increase the MD step number */
584 /* End of main MD loop */
586 /* Closing TNG files can include compressing data. Therefore it is good to do that
587 * before stopping the time measurements. */
588 mdoutf_tng_close(outf
);
590 /* Stop measuring walltime */
591 walltime_accounting_end_time(walltime_accounting
);
595 mimicCommunicator
.finalize();
598 if (!thisRankHasDuty(cr
, DUTY_PME
))
600 /* Tell the PME only node to finish */
601 gmx_pme_send_finish(cr
);
606 done_shellfc(fplog
, shellfc
, step_rel
);
608 walltime_accounting_set_nsteps_done(walltime_accounting
, step_rel
);