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50 #include "gromacs/commandline/filenm.h"
51 #include "gromacs/domdec/domdec.h"
52 #include "gromacs/domdec/domdec_struct.h"
53 #include "gromacs/ewald/ewald.h"
54 #include "gromacs/ewald/pme_pp_comm_gpu.h"
55 #include "gromacs/fileio/filetypes.h"
56 #include "gromacs/gmxlib/network.h"
57 #include "gromacs/gmxlib/nonbonded/nonbonded.h"
58 #include "gromacs/gpu_utils/gpu_utils.h"
59 #include "gromacs/hardware/hw_info.h"
60 #include "gromacs/listed_forces/listed_forces_gpu.h"
61 #include "gromacs/listed_forces/listed_forces.h"
62 #include "gromacs/listed_forces/pairs.h"
63 #include "gromacs/math/functions.h"
64 #include "gromacs/math/utilities.h"
65 #include "gromacs/math/vec.h"
66 #include "gromacs/mdlib/dispersioncorrection.h"
67 #include "gromacs/mdlib/force.h"
68 #include "gromacs/mdlib/forcerec_threading.h"
69 #include "gromacs/mdlib/gmx_omp_nthreads.h"
70 #include "gromacs/mdlib/md_support.h"
71 #include "gromacs/mdlib/wall.h"
72 #include "gromacs/mdlib/wholemoleculetransform.h"
73 #include "gromacs/mdtypes/commrec.h"
74 #include "gromacs/mdtypes/fcdata.h"
75 #include "gromacs/mdtypes/forcerec.h"
76 #include "gromacs/mdtypes/group.h"
77 #include "gromacs/mdtypes/iforceprovider.h"
78 #include "gromacs/mdtypes/inputrec.h"
79 #include "gromacs/mdtypes/interaction_const.h"
80 #include "gromacs/mdtypes/md_enums.h"
81 #include "gromacs/mdtypes/multipletimestepping.h"
82 #include "gromacs/mdtypes/nblist.h"
83 #include "gromacs/nbnxm/nbnxm.h"
84 #include "gromacs/pbcutil/ishift.h"
85 #include "gromacs/pbcutil/pbc.h"
86 #include "gromacs/tables/forcetable.h"
87 #include "gromacs/topology/mtop_util.h"
88 #include "gromacs/topology/idef.h"
89 #include "gromacs/trajectory/trajectoryframe.h"
90 #include "gromacs/utility/cstringutil.h"
91 #include "gromacs/utility/exceptions.h"
92 #include "gromacs/utility/fatalerror.h"
93 #include "gromacs/utility/gmxassert.h"
94 #include "gromacs/utility/logger.h"
95 #include "gromacs/utility/physicalnodecommunicator.h"
96 #include "gromacs/utility/pleasecite.h"
97 #include "gromacs/utility/smalloc.h"
98 #include "gromacs/utility/strconvert.h"
100 #include "gpuforcereduction.h"
102 ForceHelperBuffers::ForceHelperBuffers(bool haveDirectVirialContributions) :
103 haveDirectVirialContributions_(haveDirectVirialContributions)
105 shiftForces_.resize(gmx::c_numShiftVectors);
108 void ForceHelperBuffers::resize(int numAtoms)
110 if (haveDirectVirialContributions_)
112 forceBufferForDirectVirialContributions_.resize(numAtoms);
116 std::vector<real> makeNonBondedParameterLists(const int numAtomTypes,
117 gmx::ArrayRef<const t_iparams> iparams,
118 bool useBuckinghamPotential)
120 std::vector<real> nbfp;
122 if (useBuckinghamPotential)
124 nbfp.resize(3 * numAtomTypes * numAtomTypes);
126 for (int i = 0; (i < numAtomTypes); i++)
128 for (int j = 0; (j < numAtomTypes); j++, k++)
130 BHAMA(nbfp, numAtomTypes, i, j) = iparams[k].bham.a;
131 BHAMB(nbfp, numAtomTypes, i, j) = iparams[k].bham.b;
132 /* nbfp now includes the 6.0 derivative prefactor */
133 BHAMC(nbfp, numAtomTypes, i, j) = iparams[k].bham.c * 6.0;
139 nbfp.resize(2 * numAtomTypes * numAtomTypes);
141 for (int i = 0; (i < numAtomTypes); i++)
143 for (int j = 0; (j < numAtomTypes); j++, k++)
145 /* nbfp now includes the 6.0/12.0 derivative prefactors */
146 C6(nbfp, numAtomTypes, i, j) = iparams[k].lj.c6 * 6.0;
147 C12(nbfp, numAtomTypes, i, j) = iparams[k].lj.c12 * 12.0;
155 std::vector<real> makeLJPmeC6GridCorrectionParameters(const int numAtomTypes,
156 gmx::ArrayRef<const t_iparams> iparams,
157 LongRangeVdW ljpme_combination_rule)
159 /* For LJ-PME simulations, we correct the energies with the reciprocal space
160 * inside of the cut-off. To do this the non-bonded kernels needs to have
161 * access to the C6-values used on the reciprocal grid in pme.c
164 std::vector<real> grid(2 * numAtomTypes * numAtomTypes, 0.0);
166 for (int i = 0; (i < numAtomTypes); i++)
168 for (int j = 0; (j < numAtomTypes); j++, k++)
170 real c6i = iparams[i * (numAtomTypes + 1)].lj.c6;
171 real c12i = iparams[i * (numAtomTypes + 1)].lj.c12;
172 real c6j = iparams[j * (numAtomTypes + 1)].lj.c6;
173 real c12j = iparams[j * (numAtomTypes + 1)].lj.c12;
174 real c6 = std::sqrt(c6i * c6j);
175 if (ljpme_combination_rule == LongRangeVdW::LB && !gmx_numzero(c6) && !gmx_numzero(c12i)
176 && !gmx_numzero(c12j))
178 real sigmai = gmx::sixthroot(c12i / c6i);
179 real sigmaj = gmx::sixthroot(c12j / c6j);
180 real epsi = c6i * c6i / c12i;
181 real epsj = c6j * c6j / c12j;
182 c6 = std::sqrt(epsi * epsj) * gmx::power6(0.5 * (sigmai + sigmaj));
184 /* Store the elements at the same relative positions as C6 in nbfp in order
185 * to simplify access in the kernels
187 grid[2 * (numAtomTypes * i + j)] = c6 * 6.0;
193 //! What kind of constraint affects an atom
194 enum class ConstraintTypeForAtom : int
196 None, //!< No constraint active
197 Constraint, //!< F_CONSTR or F_CONSTRNC active
198 Settle, //! F_SETTLE active
201 static std::vector<AtomInfoWithinMoleculeBlock> makeAtomInfoForEachMoleculeBlock(const gmx_mtop_t& mtop,
202 const t_forcerec* fr)
204 std::vector<bool> atomUsesVdw(fr->ntype, false);
205 for (int ai = 0; ai < fr->ntype; ai++)
207 for (int j = 0; j < fr->ntype; j++)
209 atomUsesVdw[ai] = atomUsesVdw[ai] || fr->haveBuckingham || C6(fr->nbfp, fr->ntype, ai, j) != 0
210 || C12(fr->nbfp, fr->ntype, ai, j) != 0;
214 std::vector<AtomInfoWithinMoleculeBlock> atomInfoForEachMoleculeBlock;
215 int indexOfFirstAtomInMoleculeBlock = 0;
216 for (size_t mb = 0; mb < mtop.molblock.size(); mb++)
218 const gmx_molblock_t& molb = mtop.molblock[mb];
219 const gmx_moltype_t& molt = mtop.moltype[molb.type];
220 const auto& excl = molt.excls;
222 /* Check if all molecules in this block have identical
223 * atominfo. (That's true unless some kind of group- or
224 * distance-based algorithm is involved, e.g. QM/MM groups
225 * affecting multiple molecules within a block differently.)
226 * If so, we only need an array of the size of one molecule.
227 * Otherwise we make an array of #mol times #atoms per
230 bool allMoleculesWithinBlockAreIdentical = true;
231 for (int m = 0; m < molb.nmol; m++)
233 const int numAtomsInAllMolecules = m * molt.atoms.nr;
234 for (int a = 0; a < molt.atoms.nr; a++)
236 if (getGroupType(mtop.groups,
237 SimulationAtomGroupType::QuantumMechanics,
238 indexOfFirstAtomInMoleculeBlock + numAtomsInAllMolecules + a)
239 != getGroupType(mtop.groups,
240 SimulationAtomGroupType::QuantumMechanics,
241 indexOfFirstAtomInMoleculeBlock + a))
243 allMoleculesWithinBlockAreIdentical = false;
245 if (!mtop.groups.groupNumbers[SimulationAtomGroupType::QuantumMechanics].empty())
247 if (mtop.groups.groupNumbers[SimulationAtomGroupType::QuantumMechanics]
248 [indexOfFirstAtomInMoleculeBlock + numAtomsInAllMolecules + a]
249 != mtop.groups.groupNumbers[SimulationAtomGroupType::QuantumMechanics]
250 [indexOfFirstAtomInMoleculeBlock + a])
252 allMoleculesWithinBlockAreIdentical = false;
258 AtomInfoWithinMoleculeBlock atomInfoOfMoleculeBlock;
259 atomInfoOfMoleculeBlock.indexOfFirstAtomInMoleculeBlock = indexOfFirstAtomInMoleculeBlock;
260 atomInfoOfMoleculeBlock.indexOfLastAtomInMoleculeBlock =
261 indexOfFirstAtomInMoleculeBlock + molb.nmol * molt.atoms.nr;
262 int atomInfoSize = (allMoleculesWithinBlockAreIdentical ? 1 : molb.nmol) * molt.atoms.nr;
263 atomInfoOfMoleculeBlock.atomInfo.resize(atomInfoSize);
265 /* Set constraints flags for constrained atoms */
266 std::vector<ConstraintTypeForAtom> constraintTypeOfAtom(molt.atoms.nr, ConstraintTypeForAtom::None);
267 for (int ftype = 0; ftype < F_NRE; ftype++)
269 if (interaction_function[ftype].flags & IF_CONSTRAINT)
271 const int nral = NRAL(ftype);
272 for (int ia = 0; ia < molt.ilist[ftype].size(); ia += 1 + nral)
274 for (int a = 0; a < nral; a++)
276 constraintTypeOfAtom[molt.ilist[ftype].iatoms[ia + 1 + a]] =
277 (ftype == F_SETTLE ? ConstraintTypeForAtom::Settle
278 : ConstraintTypeForAtom::Constraint);
284 for (int m = 0; m < (allMoleculesWithinBlockAreIdentical ? 1 : molb.nmol); m++)
286 const int moleculeOffsetInBlock = m * molt.atoms.nr;
287 for (int a = 0; a < molt.atoms.nr; a++)
289 const t_atom& atom = molt.atoms.atom[a];
290 int& atomInfo = atomInfoOfMoleculeBlock.atomInfo[moleculeOffsetInBlock + a];
292 /* Store the energy group in atomInfo */
293 int gid = getGroupType(mtop.groups,
294 SimulationAtomGroupType::EnergyOutput,
295 indexOfFirstAtomInMoleculeBlock + moleculeOffsetInBlock + a);
296 SET_CGINFO_GID(atomInfo, gid);
298 bool bHaveVDW = (atomUsesVdw[atom.type] || atomUsesVdw[atom.typeB]);
299 bool bHaveQ = (atom.q != 0 || atom.qB != 0);
301 bool haveExclusions = false;
302 /* Loop over all the exclusions of atom ai */
303 for (const int j : excl[a])
307 haveExclusions = true;
312 switch (constraintTypeOfAtom[a])
314 case ConstraintTypeForAtom::Constraint: SET_CGINFO_CONSTR(atomInfo); break;
315 case ConstraintTypeForAtom::Settle: SET_CGINFO_SETTLE(atomInfo); break;
320 SET_CGINFO_EXCL_INTER(atomInfo);
324 SET_CGINFO_HAS_VDW(atomInfo);
328 SET_CGINFO_HAS_Q(atomInfo);
330 if (fr->efep != FreeEnergyPerturbationType::No && PERTURBED(atom))
332 SET_CGINFO_FEP(atomInfo);
337 atomInfoForEachMoleculeBlock.push_back(atomInfoOfMoleculeBlock);
339 indexOfFirstAtomInMoleculeBlock += molb.nmol * molt.atoms.nr;
342 return atomInfoForEachMoleculeBlock;
345 static std::vector<int> expandAtomInfo(const int nmb,
346 gmx::ArrayRef<const AtomInfoWithinMoleculeBlock> atomInfoForEachMoleculeBlock)
348 const int numAtoms = atomInfoForEachMoleculeBlock[nmb - 1].indexOfLastAtomInMoleculeBlock;
350 std::vector<int> atomInfo(numAtoms);
353 for (int a = 0; a < numAtoms; a++)
355 while (a >= atomInfoForEachMoleculeBlock[mb].indexOfLastAtomInMoleculeBlock)
359 atomInfo[a] = atomInfoForEachMoleculeBlock[mb]
360 .atomInfo[(a - atomInfoForEachMoleculeBlock[mb].indexOfFirstAtomInMoleculeBlock)
361 % atomInfoForEachMoleculeBlock[mb].atomInfo.size()];
367 /* Sets the sum of charges (squared) and C6 in the system in fr.
368 * Returns whether the system has a net charge.
370 static bool set_chargesum(FILE* log, t_forcerec* fr, const gmx_mtop_t& mtop)
372 /*This now calculates sum for q and c6*/
373 double qsum, q2sum, q, c6sum, c6;
378 for (const gmx_molblock_t& molb : mtop.molblock)
380 int nmol = molb.nmol;
381 const t_atoms* atoms = &mtop.moltype[molb.type].atoms;
382 for (int i = 0; i < atoms->nr; i++)
384 q = atoms->atom[i].q;
386 q2sum += nmol * q * q;
387 c6 = mtop.ffparams.iparams[atoms->atom[i].type * (mtop.ffparams.atnr + 1)].lj.c6;
392 fr->q2sum[0] = q2sum;
393 fr->c6sum[0] = c6sum;
395 if (fr->efep != FreeEnergyPerturbationType::No)
400 for (const gmx_molblock_t& molb : mtop.molblock)
402 int nmol = molb.nmol;
403 const t_atoms* atoms = &mtop.moltype[molb.type].atoms;
404 for (int i = 0; i < atoms->nr; i++)
406 q = atoms->atom[i].qB;
408 q2sum += nmol * q * q;
409 c6 = mtop.ffparams.iparams[atoms->atom[i].typeB * (mtop.ffparams.atnr + 1)].lj.c6;
413 fr->q2sum[1] = q2sum;
414 fr->c6sum[1] = c6sum;
419 fr->qsum[1] = fr->qsum[0];
420 fr->q2sum[1] = fr->q2sum[0];
421 fr->c6sum[1] = fr->c6sum[0];
425 if (fr->efep == FreeEnergyPerturbationType::No)
427 fprintf(log, "System total charge: %.3f\n", fr->qsum[0]);
431 fprintf(log, "System total charge, top. A: %.3f top. B: %.3f\n", fr->qsum[0], fr->qsum[1]);
435 /* A cut-off of 1e-4 is used to catch rounding errors due to ascii input */
436 return (std::abs(fr->qsum[0]) > 1e-4 || std::abs(fr->qsum[1]) > 1e-4);
439 /*!\brief If there's bonded interactions of type \c ftype1 or \c
440 * ftype2 present in the topology, build an array of the number of
441 * interactions present for each bonded interaction index found in the
444 * \c ftype1 or \c ftype2 may be set to -1 to disable seeking for a
445 * valid type with that parameter.
447 * \c count will be reallocated as necessary to fit the largest bonded
448 * interaction index found, and its current size will be returned in
449 * \c ncount. It will contain zero for every bonded interaction index
450 * for which no interactions are present in the topology.
452 static void count_tables(int ftype1, int ftype2, const gmx_mtop_t& mtop, int* ncount, int** count)
454 int ftype, i, j, tabnr;
456 // Loop over all moleculetypes
457 for (const gmx_moltype_t& molt : mtop.moltype)
459 // Loop over all interaction types
460 for (ftype = 0; ftype < F_NRE; ftype++)
462 // If the current interaction type is one of the types whose tables we're trying to count...
463 if (ftype == ftype1 || ftype == ftype2)
465 const InteractionList& il = molt.ilist[ftype];
466 const int stride = 1 + NRAL(ftype);
467 // ... and there are actually some interactions for this type
468 for (i = 0; i < il.size(); i += stride)
470 // Find out which table index the user wanted
471 tabnr = mtop.ffparams.iparams[il.iatoms[i]].tab.table;
474 gmx_fatal(FARGS, "A bonded table number is smaller than 0: %d\n", tabnr);
476 // Make room for this index in the data structure
477 if (tabnr >= *ncount)
479 srenew(*count, tabnr + 1);
480 for (j = *ncount; j < tabnr + 1; j++)
486 // Record that this table index is used and must have a valid file
494 /*!\brief If there's bonded interactions of flavour \c tabext and type
495 * \c ftype1 or \c ftype2 present in the topology, seek them in the
496 * list of filenames passed to mdrun, and make bonded tables from
499 * \c ftype1 or \c ftype2 may be set to -1 to disable seeking for a
500 * valid type with that parameter.
502 * A fatal error occurs if no matching filename is found.
504 static std::vector<bondedtable_t> make_bonded_tables(FILE* fplog,
507 const gmx_mtop_t& mtop,
508 gmx::ArrayRef<const std::string> tabbfnm,
511 std::vector<bondedtable_t> tab;
514 int* count = nullptr;
515 count_tables(ftype1, ftype2, mtop, &ncount, &count);
517 // Are there any relevant tabulated bond interactions?
521 for (int i = 0; i < ncount; i++)
523 // Do any interactions exist that requires this table?
526 // This pattern enforces the current requirement that
527 // table filenames end in a characteristic sequence
528 // before the file type extension, and avoids table 13
529 // being recognized and used for table 1.
530 std::string patternToFind = gmx::formatString("_%s%d.%s", tabext, i, ftp2ext(efXVG));
531 bool madeTable = false;
532 for (gmx::index j = 0; j < tabbfnm.ssize() && !madeTable; ++j)
534 if (gmx::endsWith(tabbfnm[j], patternToFind))
536 // Finally read the table from the file found
537 tab[i] = make_bonded_table(fplog, tabbfnm[j].c_str(), NRAL(ftype1) - 2);
543 bool isPlural = (ftype2 != -1);
545 "Tabulated interaction of type '%s%s%s' with index %d cannot be used "
546 "because no table file whose name matched '%s' was passed via the "
547 "gmx mdrun -tableb command-line option.",
548 interaction_function[ftype1].longname,
549 isPlural ? "' or '" : "",
550 isPlural ? interaction_function[ftype2].longname : "",
552 patternToFind.c_str());
562 void forcerec_set_ranges(t_forcerec* fr, int natoms_force, int natoms_force_constr, int natoms_f_novirsum)
564 fr->natoms_force = natoms_force;
565 fr->natoms_force_constr = natoms_force_constr;
567 for (auto& forceHelperBuffers : fr->forceHelperBuffers)
569 forceHelperBuffers.resize(natoms_f_novirsum);
573 /* Generate Coulomb and/or Van der Waals Ewald long-range correction tables
575 * Tables are generated for one or both, depending on if the pointers
576 * are non-null. The spacing for both table sets is the same and obeys
577 * both accuracy requirements, when relevant.
579 static void init_ewald_f_table(const interaction_const_t& ic,
582 EwaldCorrectionTables* coulombTables,
583 EwaldCorrectionTables* vdwTables)
585 const bool useCoulombTable = (EEL_PME_EWALD(ic.eeltype) && coulombTables != nullptr);
586 const bool useVdwTable = (EVDW_PME(ic.vdwtype) && vdwTables != nullptr);
588 /* Get the Ewald table spacing based on Coulomb and/or LJ
589 * Ewald coefficients and rtol.
591 const real tableScale = ewald_spline3_table_scale(ic, useCoulombTable, useVdwTable);
593 const bool havePerturbedNonbondeds = (ic.softCoreParameters != nullptr);
595 real tableLen = ic.rcoulomb;
596 if ((useCoulombTable || useVdwTable) && havePerturbedNonbondeds && rlist + tabext > 0.0)
598 /* TODO: Ideally this should also check if couple-intramol == no, but that isn't
599 * stored in ir. Grompp puts that info into an opts structure that doesn't make it into the tpr.
600 * The alternative is to look through all the exclusions and check if they come from
601 * couple-intramol == no. Meanwhile, always having larger tables should only affect
602 * memory consumption, not speed (barring cache issues).
604 tableLen = rlist + tabext;
606 const int tableSize = static_cast<int>(tableLen * tableScale) + 2;
611 generateEwaldCorrectionTables(tableSize, tableScale, ic.ewaldcoeff_q, v_q_ewald_lr);
616 *vdwTables = generateEwaldCorrectionTables(tableSize, tableScale, ic.ewaldcoeff_lj, v_lj_ewald_lr);
620 void init_interaction_const_tables(FILE* fp, interaction_const_t* ic, const real rlist, const real tableExtensionLength)
622 if (EEL_PME_EWALD(ic->eeltype) || EVDW_PME(ic->vdwtype))
625 *ic, rlist, tableExtensionLength, ic->coulombEwaldTables.get(), ic->vdwEwaldTables.get());
629 "Initialized non-bonded Ewald tables, spacing: %.2e size: %zu\n\n",
630 1 / ic->coulombEwaldTables->scale,
631 ic->coulombEwaldTables->tableF.size());
636 real cutoff_inf(real cutoff)
640 cutoff = GMX_CUTOFF_INF;
646 void init_forcerec(FILE* fplog,
647 const gmx::MDLogger& mdlog,
648 t_forcerec* forcerec,
649 const t_inputrec& inputrec,
650 const gmx_mtop_t& mtop,
651 const t_commrec* commrec,
655 gmx::ArrayRef<const std::string> tabbfnm,
658 /* The CMake default turns SIMD kernels on, but it might be turned off further down... */
659 forcerec->use_simd_kernels = GMX_USE_SIMD_KERNELS;
661 if (check_box(inputrec.pbcType, box))
663 gmx_fatal(FARGS, "%s", check_box(inputrec.pbcType, box));
666 /* Test particle insertion ? */
667 if (EI_TPI(inputrec.eI))
669 /* Set to the size of the molecule to be inserted (the last one) */
670 gmx::RangePartitioning molecules = gmx_mtop_molecules(mtop);
671 forcerec->n_tpi = molecules.block(molecules.numBlocks() - 1).size();
678 if (inputrec.coulombtype == CoulombInteractionType::RFNecUnsupported
679 || inputrec.coulombtype == CoulombInteractionType::GRFNotused)
681 gmx_fatal(FARGS, "%s electrostatics is no longer supported", enumValueToString(inputrec.coulombtype));
684 if (inputrec.bAdress)
686 gmx_fatal(FARGS, "AdResS simulations are no longer supported");
688 if (inputrec.useTwinRange)
690 gmx_fatal(FARGS, "Twin-range simulations are no longer supported");
692 /* Copy the user determined parameters */
693 forcerec->userint1 = inputrec.userint1;
694 forcerec->userint2 = inputrec.userint2;
695 forcerec->userint3 = inputrec.userint3;
696 forcerec->userint4 = inputrec.userint4;
697 forcerec->userreal1 = inputrec.userreal1;
698 forcerec->userreal2 = inputrec.userreal2;
699 forcerec->userreal3 = inputrec.userreal3;
700 forcerec->userreal4 = inputrec.userreal4;
703 forcerec->fc_stepsize = inputrec.fc_stepsize;
706 forcerec->efep = inputrec.efep;
708 if ((getenv("GMX_DISABLE_SIMD_KERNELS") != nullptr) || (getenv("GMX_NOOPTIMIZEDKERNELS") != nullptr))
710 forcerec->use_simd_kernels = FALSE;
711 if (fplog != nullptr)
714 "\nFound environment variable GMX_DISABLE_SIMD_KERNELS.\n"
715 "Disabling the usage of any SIMD-specific non-bonded & bonded kernel routines\n"
716 "(e.g. SSE2/SSE4.1/AVX).\n\n");
720 forcerec->haveBuckingham = (mtop.ffparams.functype[0] == F_BHAM);
722 /* Neighbour searching stuff */
723 forcerec->pbcType = inputrec.pbcType;
725 /* Determine if we will do PBC for distances in bonded interactions */
726 if (forcerec->pbcType == PbcType::No)
728 forcerec->bMolPBC = FALSE;
732 const bool useEwaldSurfaceCorrection =
733 (EEL_PME_EWALD(inputrec.coulombtype) && inputrec.epsilon_surface != 0);
734 const bool haveOrientationRestraints = (gmx_mtop_ftype_count(mtop, F_ORIRES) > 0);
735 if (!DOMAINDECOMP(commrec))
737 forcerec->bMolPBC = true;
739 if (useEwaldSurfaceCorrection || haveOrientationRestraints)
741 forcerec->wholeMoleculeTransform =
742 std::make_unique<gmx::WholeMoleculeTransform>(mtop, inputrec.pbcType);
747 forcerec->bMolPBC = dd_bonded_molpbc(*commrec->dd, forcerec->pbcType);
749 /* With Ewald surface correction it is useful to support e.g. running water
750 * in parallel with update groups.
751 * With orientation restraints there is no sensible use case supported with DD.
753 if ((useEwaldSurfaceCorrection && !dd_moleculesAreAlwaysWhole(*commrec->dd))
754 || haveOrientationRestraints)
757 "You requested Ewald surface correction or orientation restraints, "
758 "but molecules are broken "
759 "over periodic boundary conditions by the domain decomposition. "
760 "Run without domain decomposition instead.");
764 if (useEwaldSurfaceCorrection)
766 GMX_RELEASE_ASSERT(!DOMAINDECOMP(commrec) || dd_moleculesAreAlwaysWhole(*commrec->dd),
767 "Molecules can not be broken by PBC with epsilon_surface > 0");
771 forcerec->rc_scaling = inputrec.refcoord_scaling;
772 copy_rvec(inputrec.posres_com, forcerec->posres_com);
773 copy_rvec(inputrec.posres_comB, forcerec->posres_comB);
774 forcerec->rlist = cutoff_inf(inputrec.rlist);
775 forcerec->ljpme_combination_rule = inputrec.ljpme_combination_rule;
777 /* This now calculates sum for q and c6*/
778 bool systemHasNetCharge = set_chargesum(fplog, forcerec, mtop);
780 /* Make data structure used by kernels */
781 forcerec->ic = std::make_unique<interaction_const_t>(
782 init_interaction_const(fplog, inputrec, mtop, systemHasNetCharge));
783 init_interaction_const_tables(fplog, forcerec->ic.get(), forcerec->rlist, inputrec.tabext);
785 const interaction_const_t* interactionConst = forcerec->ic.get();
787 /* TODO: Replace this Ewald table or move it into interaction_const_t */
788 if (inputrec.coulombtype == CoulombInteractionType::Ewald)
790 forcerec->ewald_table = std::make_unique<gmx_ewald_tab_t>(inputrec, fplog);
793 /* Electrostatics: Translate from interaction-setting-in-mdp-file to kernel interaction format */
794 switch (interactionConst->eeltype)
796 case CoulombInteractionType::Cut:
797 forcerec->nbkernel_elec_interaction = NbkernelElecType::Coulomb;
800 case CoulombInteractionType::RF:
801 case CoulombInteractionType::RFZero:
802 forcerec->nbkernel_elec_interaction = NbkernelElecType::ReactionField;
805 case CoulombInteractionType::Switch:
806 case CoulombInteractionType::Shift:
807 case CoulombInteractionType::User:
808 case CoulombInteractionType::PmeSwitch:
809 case CoulombInteractionType::PmeUser:
810 case CoulombInteractionType::PmeUserSwitch:
811 forcerec->nbkernel_elec_interaction = NbkernelElecType::CubicSplineTable;
814 case CoulombInteractionType::Pme:
815 case CoulombInteractionType::P3mAD:
816 case CoulombInteractionType::Ewald:
817 forcerec->nbkernel_elec_interaction = NbkernelElecType::Ewald;
822 "Unsupported electrostatic interaction: %s",
823 enumValueToString(interactionConst->eeltype));
825 forcerec->nbkernel_elec_modifier = interactionConst->coulomb_modifier;
827 /* Vdw: Translate from mdp settings to kernel format */
828 switch (interactionConst->vdwtype)
830 case VanDerWaalsType::Cut:
831 if (forcerec->haveBuckingham)
833 forcerec->nbkernel_vdw_interaction = NbkernelVdwType::Buckingham;
837 forcerec->nbkernel_vdw_interaction = NbkernelVdwType::LennardJones;
840 case VanDerWaalsType::Pme:
841 forcerec->nbkernel_vdw_interaction = NbkernelVdwType::LJEwald;
844 case VanDerWaalsType::Switch:
845 case VanDerWaalsType::Shift:
846 case VanDerWaalsType::User:
847 forcerec->nbkernel_vdw_interaction = NbkernelVdwType::CubicSplineTable;
851 gmx_fatal(FARGS, "Unsupported vdw interaction: %s", enumValueToString(interactionConst->vdwtype));
853 forcerec->nbkernel_vdw_modifier = interactionConst->vdw_modifier;
855 if (!gmx_within_tol(interactionConst->reppow, 12.0, 10 * GMX_DOUBLE_EPS))
857 gmx_fatal(FARGS, "Only LJ repulsion power 12 is supported");
859 /* Older tpr files can contain Coulomb user tables with the Verlet cutoff-scheme,
860 * while mdrun does not (and never did) support this.
862 if (EEL_USER(forcerec->ic->eeltype))
865 "Electrostatics type %s is currently not supported",
866 enumValueToString(inputrec.coulombtype));
869 /* 1-4 interaction electrostatics */
870 forcerec->fudgeQQ = mtop.ffparams.fudgeQQ;
872 // Multiple time stepping
873 forcerec->useMts = inputrec.useMts;
875 if (forcerec->useMts)
877 GMX_ASSERT(gmx::checkMtsRequirements(inputrec).empty(),
878 "All MTS requirements should be met here");
881 const bool haveDirectVirialContributionsFast =
882 forcerec->forceProviders->hasForceProvider() || gmx_mtop_ftype_count(mtop, F_POSRES) > 0
883 || gmx_mtop_ftype_count(mtop, F_FBPOSRES) > 0 || inputrec.nwall > 0 || inputrec.bPull
884 || inputrec.bRot || inputrec.bIMD;
885 const bool haveDirectVirialContributionsSlow =
886 EEL_FULL(interactionConst->eeltype) || EVDW_PME(interactionConst->vdwtype);
887 for (int i = 0; i < (forcerec->useMts ? 2 : 1); i++)
889 bool haveDirectVirialContributions =
890 (((!forcerec->useMts || i == 0) && haveDirectVirialContributionsFast)
891 || ((!forcerec->useMts || i == 1) && haveDirectVirialContributionsSlow));
892 forcerec->forceHelperBuffers.emplace_back(haveDirectVirialContributions);
895 if (forcerec->shift_vec.empty())
897 forcerec->shift_vec.resize(gmx::c_numShiftVectors);
900 GMX_ASSERT(forcerec->nbfp.empty(), "The nonbonded force parameters should not be set up yet.");
901 forcerec->ntype = mtop.ffparams.atnr;
902 forcerec->nbfp = makeNonBondedParameterLists(
903 mtop.ffparams.atnr, mtop.ffparams.iparams, forcerec->haveBuckingham);
904 if (EVDW_PME(interactionConst->vdwtype))
906 forcerec->ljpme_c6grid = makeLJPmeC6GridCorrectionParameters(
907 mtop.ffparams.atnr, mtop.ffparams.iparams, forcerec->ljpme_combination_rule);
910 /* Copy the energy group exclusions */
911 forcerec->egp_flags = inputrec.opts.egp_flags;
913 /* Van der Waals stuff */
914 if ((interactionConst->vdwtype != VanDerWaalsType::Cut)
915 && (interactionConst->vdwtype != VanDerWaalsType::User) && !forcerec->haveBuckingham)
917 if (interactionConst->rvdw_switch >= interactionConst->rvdw)
920 "rvdw_switch (%f) must be < rvdw (%f)",
921 interactionConst->rvdw_switch,
922 interactionConst->rvdw);
927 "Using %s Lennard-Jones, switch between %g and %g nm\n",
928 (interactionConst->eeltype == CoulombInteractionType::Switch) ? "switched" : "shifted",
929 interactionConst->rvdw_switch,
930 interactionConst->rvdw);
934 if (forcerec->haveBuckingham && EVDW_PME(interactionConst->vdwtype))
936 gmx_fatal(FARGS, "LJ PME not supported with Buckingham");
939 if (forcerec->haveBuckingham
940 && (interactionConst->vdwtype == VanDerWaalsType::Shift
941 || interactionConst->vdwtype == VanDerWaalsType::Switch))
943 gmx_fatal(FARGS, "Switch/shift interaction not supported with Buckingham");
946 if (forcerec->haveBuckingham)
948 gmx_fatal(FARGS, "The Verlet cutoff-scheme does not (yet) support Buckingham");
951 if (inputrec.implicit_solvent)
953 gmx_fatal(FARGS, "Implict solvation is no longer supported.");
957 /* This code automatically gives table length tabext without cut-off's,
958 * in that case grompp should already have checked that we do not need
959 * normal tables and we only generate tables for 1-4 interactions.
961 real rtab = inputrec.rlist + inputrec.tabext;
963 /* We want to use unmodified tables for 1-4 coulombic
964 * interactions, so we must in general have an extra set of
966 if (gmx_mtop_ftype_count(mtop, F_LJ14) > 0 || gmx_mtop_ftype_count(mtop, F_LJC14_Q) > 0
967 || gmx_mtop_ftype_count(mtop, F_LJC_PAIRS_NB) > 0)
969 forcerec->pairsTable = make_tables(fplog, interactionConst, tabpfn, rtab, GMX_MAKETABLES_14ONLY);
973 forcerec->nwall = inputrec.nwall;
974 if (inputrec.nwall && inputrec.wall_type == WallType::Table)
976 make_wall_tables(fplog, inputrec, tabfn, &mtop.groups, forcerec);
979 forcerec->fcdata = std::make_unique<t_fcdata>();
981 if (!tabbfnm.empty())
983 t_fcdata& fcdata = *forcerec->fcdata;
984 // Need to catch std::bad_alloc
985 // TODO Don't need to catch this here, when merging with master branch
988 // TODO move these tables into a separate struct and store reference in ListedForces
989 fcdata.bondtab = make_bonded_tables(fplog, F_TABBONDS, F_TABBONDSNC, mtop, tabbfnm, "b");
990 fcdata.angletab = make_bonded_tables(fplog, F_TABANGLES, -1, mtop, tabbfnm, "a");
991 fcdata.dihtab = make_bonded_tables(fplog, F_TABDIHS, -1, mtop, tabbfnm, "d");
993 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR
1000 "No fcdata or table file name passed, can not read table, can not do bonded "
1005 /* Initialize the thread working data for bonded interactions */
1006 if (forcerec->useMts)
1008 // Add one ListedForces object for each MTS level
1009 bool isFirstLevel = true;
1010 for (const auto& mtsLevel : inputrec.mtsLevels)
1012 ListedForces::InteractionSelection interactionSelection;
1013 const auto& forceGroups = mtsLevel.forceGroups;
1014 if (forceGroups[static_cast<int>(gmx::MtsForceGroups::Pair)])
1016 interactionSelection.set(static_cast<int>(ListedForces::InteractionGroup::Pairs));
1018 if (forceGroups[static_cast<int>(gmx::MtsForceGroups::Dihedral)])
1020 interactionSelection.set(static_cast<int>(ListedForces::InteractionGroup::Dihedrals));
1022 if (forceGroups[static_cast<int>(gmx::MtsForceGroups::Angle)])
1024 interactionSelection.set(static_cast<int>(ListedForces::InteractionGroup::Angles));
1028 interactionSelection.set(static_cast<int>(ListedForces::InteractionGroup::Rest));
1029 isFirstLevel = false;
1031 forcerec->listedForces.emplace_back(
1033 mtop.groups.groups[SimulationAtomGroupType::EnergyOutput].size(),
1034 gmx_omp_nthreads_get(ModuleMultiThread::Bonded),
1035 interactionSelection,
1041 // Add one ListedForces object with all listed interactions
1042 forcerec->listedForces.emplace_back(
1044 mtop.groups.groups[SimulationAtomGroupType::EnergyOutput].size(),
1045 gmx_omp_nthreads_get(ModuleMultiThread::Bonded),
1046 ListedForces::interactionSelectionAll(),
1050 // QM/MM initialization if requested
1053 gmx_incons("QM/MM was requested, but is no longer available in GROMACS");
1056 /* Set all the static charge group info */
1057 forcerec->atomInfoForEachMoleculeBlock = makeAtomInfoForEachMoleculeBlock(mtop, forcerec);
1058 if (!DOMAINDECOMP(commrec))
1060 forcerec->atomInfo = expandAtomInfo(mtop.molblock.size(), forcerec->atomInfoForEachMoleculeBlock);
1063 if (!DOMAINDECOMP(commrec))
1065 forcerec_set_ranges(forcerec, mtop.natoms, mtop.natoms, mtop.natoms);
1068 forcerec->print_force = print_force;
1070 forcerec->nthread_ewc = gmx_omp_nthreads_get(ModuleMultiThread::Bonded);
1071 forcerec->ewc_t.resize(forcerec->nthread_ewc);
1073 if (inputrec.eDispCorr != DispersionCorrectionType::No)
1075 forcerec->dispersionCorrection = std::make_unique<DispersionCorrection>(
1076 mtop, inputrec, forcerec->haveBuckingham, forcerec->ntype, forcerec->nbfp, *forcerec->ic, tabfn);
1077 forcerec->dispersionCorrection->print(mdlog);
1080 if (fplog != nullptr)
1082 /* Here we switch from using mdlog, which prints the newline before
1083 * the paragraph, to our old fprintf logging, which prints the newline
1084 * after the paragraph, so we should add a newline here.
1086 fprintf(fplog, "\n");
1090 t_forcerec::t_forcerec() = default;
1092 t_forcerec::~t_forcerec() = default;