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50 #include "gmx_fatal.h"
51 #include "gmx_fatal_collective.h"
55 #include "nonbonded.h"
64 #include "md_support.h"
65 #include "md_logging.h"
70 #include "mtop_util.h"
71 #include "nbnxn_search.h"
72 #include "nbnxn_atomdata.h"
73 #include "nbnxn_consts.h"
75 #include "gmx_omp_nthreads.h"
76 #include "gmx_detect_hardware.h"
79 /* MSVC definition for __cpuid() */
83 #include "types/nbnxn_cuda_types_ext.h"
84 #include "gpu_utils.h"
85 #include "nbnxn_cuda_data_mgmt.h"
86 #include "pmalloc_cuda.h"
88 t_forcerec *mk_forcerec(void)
98 static void pr_nbfp(FILE *fp, real *nbfp, gmx_bool bBHAM, int atnr)
102 for (i = 0; (i < atnr); i++)
104 for (j = 0; (j < atnr); j++)
106 fprintf(fp, "%2d - %2d", i, j);
109 fprintf(fp, " a=%10g, b=%10g, c=%10g\n", BHAMA(nbfp, atnr, i, j),
110 BHAMB(nbfp, atnr, i, j), BHAMC(nbfp, atnr, i, j)/6.0);
114 fprintf(fp, " c6=%10g, c12=%10g\n", C6(nbfp, atnr, i, j)/6.0,
115 C12(nbfp, atnr, i, j)/12.0);
122 static real *mk_nbfp(const gmx_ffparams_t *idef, gmx_bool bBHAM)
130 snew(nbfp, 3*atnr*atnr);
131 for (i = k = 0; (i < atnr); i++)
133 for (j = 0; (j < atnr); j++, k++)
135 BHAMA(nbfp, atnr, i, j) = idef->iparams[k].bham.a;
136 BHAMB(nbfp, atnr, i, j) = idef->iparams[k].bham.b;
137 /* nbfp now includes the 6.0 derivative prefactor */
138 BHAMC(nbfp, atnr, i, j) = idef->iparams[k].bham.c*6.0;
144 snew(nbfp, 2*atnr*atnr);
145 for (i = k = 0; (i < atnr); i++)
147 for (j = 0; (j < atnr); j++, k++)
149 /* nbfp now includes the 6.0/12.0 derivative prefactors */
150 C6(nbfp, atnr, i, j) = idef->iparams[k].lj.c6*6.0;
151 C12(nbfp, atnr, i, j) = idef->iparams[k].lj.c12*12.0;
159 /* This routine sets fr->solvent_opt to the most common solvent in the
160 * system, e.g. esolSPC or esolTIP4P. It will also mark each charge group in
161 * the fr->solvent_type array with the correct type (or esolNO).
163 * Charge groups that fulfill the conditions but are not identical to the
164 * most common one will be marked as esolNO in the solvent_type array.
166 * TIP3p is identical to SPC for these purposes, so we call it
167 * SPC in the arrays (Apologies to Bill Jorgensen ;-)
169 * NOTE: QM particle should not
170 * become an optimized solvent. Not even if there is only one charge
180 } solvent_parameters_t;
183 check_solvent_cg(const gmx_moltype_t *molt,
186 const unsigned char *qm_grpnr,
187 const t_grps *qm_grps,
189 int *n_solvent_parameters,
190 solvent_parameters_t **solvent_parameters_p,
194 const t_blocka * excl;
205 solvent_parameters_t *solvent_parameters;
207 /* We use a list with parameters for each solvent type.
208 * Every time we discover a new molecule that fulfills the basic
209 * conditions for a solvent we compare with the previous entries
210 * in these lists. If the parameters are the same we just increment
211 * the counter for that type, and otherwise we create a new type
212 * based on the current molecule.
214 * Once we've finished going through all molecules we check which
215 * solvent is most common, and mark all those molecules while we
216 * clear the flag on all others.
219 solvent_parameters = *solvent_parameters_p;
221 /* Mark the cg first as non optimized */
224 /* Check if this cg has no exclusions with atoms in other charge groups
225 * and all atoms inside the charge group excluded.
226 * We only have 3 or 4 atom solvent loops.
228 if (GET_CGINFO_EXCL_INTER(cginfo) ||
229 !GET_CGINFO_EXCL_INTRA(cginfo))
234 /* Get the indices of the first atom in this charge group */
235 j0 = molt->cgs.index[cg0];
236 j1 = molt->cgs.index[cg0+1];
238 /* Number of atoms in our molecule */
244 "Moltype '%s': there are %d atoms in this charge group\n",
248 /* Check if it could be an SPC (3 atoms) or TIP4p (4) water,
251 if (nj < 3 || nj > 4)
256 /* Check if we are doing QM on this group */
258 if (qm_grpnr != NULL)
260 for (j = j0; j < j1 && !qm; j++)
262 qm = (qm_grpnr[j] < qm_grps->nr - 1);
265 /* Cannot use solvent optimization with QM */
271 atom = molt->atoms.atom;
273 /* Still looks like a solvent, time to check parameters */
275 /* If it is perturbed (free energy) we can't use the solvent loops,
276 * so then we just skip to the next molecule.
280 for (j = j0; j < j1 && !perturbed; j++)
282 perturbed = PERTURBED(atom[j]);
290 /* Now it's only a question if the VdW and charge parameters
291 * are OK. Before doing the check we compare and see if they are
292 * identical to a possible previous solvent type.
293 * First we assign the current types and charges.
295 for (j = 0; j < nj; j++)
297 tmp_vdwtype[j] = atom[j0+j].type;
298 tmp_charge[j] = atom[j0+j].q;
301 /* Does it match any previous solvent type? */
302 for (k = 0; k < *n_solvent_parameters; k++)
307 /* We can only match SPC with 3 atoms and TIP4p with 4 atoms */
308 if ( (solvent_parameters[k].model == esolSPC && nj != 3) ||
309 (solvent_parameters[k].model == esolTIP4P && nj != 4) )
314 /* Check that types & charges match for all atoms in molecule */
315 for (j = 0; j < nj && match == TRUE; j++)
317 if (tmp_vdwtype[j] != solvent_parameters[k].vdwtype[j])
321 if (tmp_charge[j] != solvent_parameters[k].charge[j])
328 /* Congratulations! We have a matched solvent.
329 * Flag it with this type for later processing.
332 solvent_parameters[k].count += nmol;
334 /* We are done with this charge group */
339 /* If we get here, we have a tentative new solvent type.
340 * Before we add it we must check that it fulfills the requirements
341 * of the solvent optimized loops. First determine which atoms have
344 for (j = 0; j < nj; j++)
347 tjA = tmp_vdwtype[j];
349 /* Go through all other tpes and see if any have non-zero
350 * VdW parameters when combined with this one.
352 for (k = 0; k < fr->ntype && (has_vdw[j] == FALSE); k++)
354 /* We already checked that the atoms weren't perturbed,
355 * so we only need to check state A now.
359 has_vdw[j] = (has_vdw[j] ||
360 (BHAMA(fr->nbfp, fr->ntype, tjA, k) != 0.0) ||
361 (BHAMB(fr->nbfp, fr->ntype, tjA, k) != 0.0) ||
362 (BHAMC(fr->nbfp, fr->ntype, tjA, k) != 0.0));
367 has_vdw[j] = (has_vdw[j] ||
368 (C6(fr->nbfp, fr->ntype, tjA, k) != 0.0) ||
369 (C12(fr->nbfp, fr->ntype, tjA, k) != 0.0));
374 /* Now we know all we need to make the final check and assignment. */
378 * For this we require thatn all atoms have charge,
379 * the charges on atom 2 & 3 should be the same, and only
380 * atom 1 might have VdW.
382 if (has_vdw[1] == FALSE &&
383 has_vdw[2] == FALSE &&
384 tmp_charge[0] != 0 &&
385 tmp_charge[1] != 0 &&
386 tmp_charge[2] == tmp_charge[1])
388 srenew(solvent_parameters, *n_solvent_parameters+1);
389 solvent_parameters[*n_solvent_parameters].model = esolSPC;
390 solvent_parameters[*n_solvent_parameters].count = nmol;
391 for (k = 0; k < 3; k++)
393 solvent_parameters[*n_solvent_parameters].vdwtype[k] = tmp_vdwtype[k];
394 solvent_parameters[*n_solvent_parameters].charge[k] = tmp_charge[k];
397 *cg_sp = *n_solvent_parameters;
398 (*n_solvent_parameters)++;
403 /* Or could it be a TIP4P?
404 * For this we require thatn atoms 2,3,4 have charge, but not atom 1.
405 * Only atom 1 mght have VdW.
407 if (has_vdw[1] == FALSE &&
408 has_vdw[2] == FALSE &&
409 has_vdw[3] == FALSE &&
410 tmp_charge[0] == 0 &&
411 tmp_charge[1] != 0 &&
412 tmp_charge[2] == tmp_charge[1] &&
415 srenew(solvent_parameters, *n_solvent_parameters+1);
416 solvent_parameters[*n_solvent_parameters].model = esolTIP4P;
417 solvent_parameters[*n_solvent_parameters].count = nmol;
418 for (k = 0; k < 4; k++)
420 solvent_parameters[*n_solvent_parameters].vdwtype[k] = tmp_vdwtype[k];
421 solvent_parameters[*n_solvent_parameters].charge[k] = tmp_charge[k];
424 *cg_sp = *n_solvent_parameters;
425 (*n_solvent_parameters)++;
429 *solvent_parameters_p = solvent_parameters;
433 check_solvent(FILE * fp,
434 const gmx_mtop_t * mtop,
436 cginfo_mb_t *cginfo_mb)
439 const t_block * mols;
440 const gmx_moltype_t *molt;
441 int mb, mol, cg_mol, at_offset, cg_offset, am, cgm, i, nmol_ch, nmol;
442 int n_solvent_parameters;
443 solvent_parameters_t *solvent_parameters;
449 fprintf(debug, "Going to determine what solvent types we have.\n");
454 n_solvent_parameters = 0;
455 solvent_parameters = NULL;
456 /* Allocate temporary array for solvent type */
457 snew(cg_sp, mtop->nmolblock);
461 for (mb = 0; mb < mtop->nmolblock; mb++)
463 molt = &mtop->moltype[mtop->molblock[mb].type];
465 /* Here we have to loop over all individual molecules
466 * because we need to check for QMMM particles.
468 snew(cg_sp[mb], cginfo_mb[mb].cg_mod);
469 nmol_ch = cginfo_mb[mb].cg_mod/cgs->nr;
470 nmol = mtop->molblock[mb].nmol/nmol_ch;
471 for (mol = 0; mol < nmol_ch; mol++)
474 am = mol*cgs->index[cgs->nr];
475 for (cg_mol = 0; cg_mol < cgs->nr; cg_mol++)
477 check_solvent_cg(molt, cg_mol, nmol,
478 mtop->groups.grpnr[egcQMMM] ?
479 mtop->groups.grpnr[egcQMMM]+at_offset+am : 0,
480 &mtop->groups.grps[egcQMMM],
482 &n_solvent_parameters, &solvent_parameters,
483 cginfo_mb[mb].cginfo[cgm+cg_mol],
484 &cg_sp[mb][cgm+cg_mol]);
487 cg_offset += cgs->nr;
488 at_offset += cgs->index[cgs->nr];
491 /* Puh! We finished going through all charge groups.
492 * Now find the most common solvent model.
495 /* Most common solvent this far */
497 for (i = 0; i < n_solvent_parameters; i++)
500 solvent_parameters[i].count > solvent_parameters[bestsp].count)
508 bestsol = solvent_parameters[bestsp].model;
515 #ifdef DISABLE_WATER_NLIST
520 for (mb = 0; mb < mtop->nmolblock; mb++)
522 cgs = &mtop->moltype[mtop->molblock[mb].type].cgs;
523 nmol = (mtop->molblock[mb].nmol*cgs->nr)/cginfo_mb[mb].cg_mod;
524 for (i = 0; i < cginfo_mb[mb].cg_mod; i++)
526 if (cg_sp[mb][i] == bestsp)
528 SET_CGINFO_SOLOPT(cginfo_mb[mb].cginfo[i], bestsol);
533 SET_CGINFO_SOLOPT(cginfo_mb[mb].cginfo[i], esolNO);
540 if (bestsol != esolNO && fp != NULL)
542 fprintf(fp, "\nEnabling %s-like water optimization for %d molecules.\n\n",
544 solvent_parameters[bestsp].count);
547 sfree(solvent_parameters);
548 fr->solvent_opt = bestsol;
552 acNONE = 0, acCONSTRAINT, acSETTLE
555 static cginfo_mb_t *init_cginfo_mb(FILE *fplog, const gmx_mtop_t *mtop,
556 t_forcerec *fr, gmx_bool bNoSolvOpt,
557 gmx_bool *bExcl_IntraCGAll_InterCGNone)
560 const t_blocka *excl;
561 const gmx_moltype_t *molt;
562 const gmx_molblock_t *molb;
563 cginfo_mb_t *cginfo_mb;
566 int cg_offset, a_offset, cgm, am;
567 int mb, m, ncg_tot, cg, a0, a1, gid, ai, j, aj, excl_nalloc;
571 gmx_bool bId, *bExcl, bExclIntraAll, bExclInter, bHaveVDW, bHaveQ;
573 ncg_tot = ncg_mtop(mtop);
574 snew(cginfo_mb, mtop->nmolblock);
576 snew(type_VDW, fr->ntype);
577 for (ai = 0; ai < fr->ntype; ai++)
579 type_VDW[ai] = FALSE;
580 for (j = 0; j < fr->ntype; j++)
582 type_VDW[ai] = type_VDW[ai] ||
584 C6(fr->nbfp, fr->ntype, ai, j) != 0 ||
585 C12(fr->nbfp, fr->ntype, ai, j) != 0;
589 *bExcl_IntraCGAll_InterCGNone = TRUE;
592 snew(bExcl, excl_nalloc);
595 for (mb = 0; mb < mtop->nmolblock; mb++)
597 molb = &mtop->molblock[mb];
598 molt = &mtop->moltype[molb->type];
602 /* Check if the cginfo is identical for all molecules in this block.
603 * If so, we only need an array of the size of one molecule.
604 * Otherwise we make an array of #mol times #cgs per molecule.
608 for (m = 0; m < molb->nmol; m++)
610 am = m*cgs->index[cgs->nr];
611 for (cg = 0; cg < cgs->nr; cg++)
614 a1 = cgs->index[cg+1];
615 if (ggrpnr(&mtop->groups, egcENER, a_offset+am+a0) !=
616 ggrpnr(&mtop->groups, egcENER, a_offset +a0))
620 if (mtop->groups.grpnr[egcQMMM] != NULL)
622 for (ai = a0; ai < a1; ai++)
624 if (mtop->groups.grpnr[egcQMMM][a_offset+am+ai] !=
625 mtop->groups.grpnr[egcQMMM][a_offset +ai])
634 cginfo_mb[mb].cg_start = cg_offset;
635 cginfo_mb[mb].cg_end = cg_offset + molb->nmol*cgs->nr;
636 cginfo_mb[mb].cg_mod = (bId ? 1 : molb->nmol)*cgs->nr;
637 snew(cginfo_mb[mb].cginfo, cginfo_mb[mb].cg_mod);
638 cginfo = cginfo_mb[mb].cginfo;
640 /* Set constraints flags for constrained atoms */
641 snew(a_con, molt->atoms.nr);
642 for (ftype = 0; ftype < F_NRE; ftype++)
644 if (interaction_function[ftype].flags & IF_CONSTRAINT)
649 for (ia = 0; ia < molt->ilist[ftype].nr; ia += 1+nral)
653 for (a = 0; a < nral; a++)
655 a_con[molt->ilist[ftype].iatoms[ia+1+a]] =
656 (ftype == F_SETTLE ? acSETTLE : acCONSTRAINT);
662 for (m = 0; m < (bId ? 1 : molb->nmol); m++)
665 am = m*cgs->index[cgs->nr];
666 for (cg = 0; cg < cgs->nr; cg++)
669 a1 = cgs->index[cg+1];
671 /* Store the energy group in cginfo */
672 gid = ggrpnr(&mtop->groups, egcENER, a_offset+am+a0);
673 SET_CGINFO_GID(cginfo[cgm+cg], gid);
675 /* Check the intra/inter charge group exclusions */
676 if (a1-a0 > excl_nalloc)
678 excl_nalloc = a1 - a0;
679 srenew(bExcl, excl_nalloc);
681 /* bExclIntraAll: all intra cg interactions excluded
682 * bExclInter: any inter cg interactions excluded
684 bExclIntraAll = TRUE;
688 for (ai = a0; ai < a1; ai++)
690 /* Check VDW and electrostatic interactions */
691 bHaveVDW = bHaveVDW || (type_VDW[molt->atoms.atom[ai].type] ||
692 type_VDW[molt->atoms.atom[ai].typeB]);
693 bHaveQ = bHaveQ || (molt->atoms.atom[ai].q != 0 ||
694 molt->atoms.atom[ai].qB != 0);
696 /* Clear the exclusion list for atom ai */
697 for (aj = a0; aj < a1; aj++)
699 bExcl[aj-a0] = FALSE;
701 /* Loop over all the exclusions of atom ai */
702 for (j = excl->index[ai]; j < excl->index[ai+1]; j++)
705 if (aj < a0 || aj >= a1)
714 /* Check if ai excludes a0 to a1 */
715 for (aj = a0; aj < a1; aj++)
719 bExclIntraAll = FALSE;
726 SET_CGINFO_CONSTR(cginfo[cgm+cg]);
729 SET_CGINFO_SETTLE(cginfo[cgm+cg]);
737 SET_CGINFO_EXCL_INTRA(cginfo[cgm+cg]);
741 SET_CGINFO_EXCL_INTER(cginfo[cgm+cg]);
743 if (a1 - a0 > MAX_CHARGEGROUP_SIZE)
745 /* The size in cginfo is currently only read with DD */
746 gmx_fatal(FARGS, "A charge group has size %d which is larger than the limit of %d atoms", a1-a0, MAX_CHARGEGROUP_SIZE);
750 SET_CGINFO_HAS_VDW(cginfo[cgm+cg]);
754 SET_CGINFO_HAS_Q(cginfo[cgm+cg]);
756 /* Store the charge group size */
757 SET_CGINFO_NATOMS(cginfo[cgm+cg], a1-a0);
759 if (!bExclIntraAll || bExclInter)
761 *bExcl_IntraCGAll_InterCGNone = FALSE;
768 cg_offset += molb->nmol*cgs->nr;
769 a_offset += molb->nmol*cgs->index[cgs->nr];
773 /* the solvent optimizer is called after the QM is initialized,
774 * because we don't want to have the QM subsystemto become an
778 check_solvent(fplog, mtop, fr, cginfo_mb);
780 if (getenv("GMX_NO_SOLV_OPT"))
784 fprintf(fplog, "Found environment variable GMX_NO_SOLV_OPT.\n"
785 "Disabling all solvent optimization\n");
787 fr->solvent_opt = esolNO;
791 fr->solvent_opt = esolNO;
793 if (!fr->solvent_opt)
795 for (mb = 0; mb < mtop->nmolblock; mb++)
797 for (cg = 0; cg < cginfo_mb[mb].cg_mod; cg++)
799 SET_CGINFO_SOLOPT(cginfo_mb[mb].cginfo[cg], esolNO);
807 static int *cginfo_expand(int nmb, cginfo_mb_t *cgi_mb)
812 ncg = cgi_mb[nmb-1].cg_end;
815 for (cg = 0; cg < ncg; cg++)
817 while (cg >= cgi_mb[mb].cg_end)
822 cgi_mb[mb].cginfo[(cg - cgi_mb[mb].cg_start) % cgi_mb[mb].cg_mod];
828 static void set_chargesum(FILE *log, t_forcerec *fr, const gmx_mtop_t *mtop)
830 double qsum, q2sum, q;
832 const t_atoms *atoms;
836 for (mb = 0; mb < mtop->nmolblock; mb++)
838 nmol = mtop->molblock[mb].nmol;
839 atoms = &mtop->moltype[mtop->molblock[mb].type].atoms;
840 for (i = 0; i < atoms->nr; i++)
842 q = atoms->atom[i].q;
848 fr->q2sum[0] = q2sum;
849 if (fr->efep != efepNO)
853 for (mb = 0; mb < mtop->nmolblock; mb++)
855 nmol = mtop->molblock[mb].nmol;
856 atoms = &mtop->moltype[mtop->molblock[mb].type].atoms;
857 for (i = 0; i < atoms->nr; i++)
859 q = atoms->atom[i].qB;
864 fr->q2sum[1] = q2sum;
869 fr->qsum[1] = fr->qsum[0];
870 fr->q2sum[1] = fr->q2sum[0];
874 if (fr->efep == efepNO)
876 fprintf(log, "System total charge: %.3f\n", fr->qsum[0]);
880 fprintf(log, "System total charge, top. A: %.3f top. B: %.3f\n",
881 fr->qsum[0], fr->qsum[1]);
886 void update_forcerec(t_forcerec *fr, matrix box)
888 if (fr->eeltype == eelGRF)
890 calc_rffac(NULL, fr->eeltype, fr->epsilon_r, fr->epsilon_rf,
891 fr->rcoulomb, fr->temp, fr->zsquare, box,
892 &fr->kappa, &fr->k_rf, &fr->c_rf);
896 void set_avcsixtwelve(FILE *fplog, t_forcerec *fr, const gmx_mtop_t *mtop)
898 const t_atoms *atoms, *atoms_tpi;
899 const t_blocka *excl;
900 int mb, nmol, nmolc, i, j, tpi, tpj, j1, j2, k, n, nexcl, q;
901 #if (defined SIZEOF_LONG_LONG_INT) && (SIZEOF_LONG_LONG_INT >= 8)
902 long long int npair, npair_ij, tmpi, tmpj;
904 double npair, npair_ij, tmpi, tmpj;
906 double csix, ctwelve;
915 for (q = 0; q < (fr->efep == efepNO ? 1 : 2); q++)
923 /* Count the types so we avoid natoms^2 operations */
924 snew(typecount, ntp);
925 for (mb = 0; mb < mtop->nmolblock; mb++)
927 nmol = mtop->molblock[mb].nmol;
928 atoms = &mtop->moltype[mtop->molblock[mb].type].atoms;
929 for (i = 0; i < atoms->nr; i++)
933 tpi = atoms->atom[i].type;
937 tpi = atoms->atom[i].typeB;
939 typecount[tpi] += nmol;
942 for (tpi = 0; tpi < ntp; tpi++)
944 for (tpj = tpi; tpj < ntp; tpj++)
946 tmpi = typecount[tpi];
947 tmpj = typecount[tpj];
950 npair_ij = tmpi*tmpj;
954 npair_ij = tmpi*(tmpi - 1)/2;
958 /* nbfp now includes the 6.0 derivative prefactor */
959 csix += npair_ij*BHAMC(nbfp, ntp, tpi, tpj)/6.0;
963 /* nbfp now includes the 6.0/12.0 derivative prefactors */
964 csix += npair_ij* C6(nbfp, ntp, tpi, tpj)/6.0;
965 ctwelve += npair_ij* C12(nbfp, ntp, tpi, tpj)/12.0;
971 /* Subtract the excluded pairs.
972 * The main reason for substracting exclusions is that in some cases
973 * some combinations might never occur and the parameters could have
974 * any value. These unused values should not influence the dispersion
977 for (mb = 0; mb < mtop->nmolblock; mb++)
979 nmol = mtop->molblock[mb].nmol;
980 atoms = &mtop->moltype[mtop->molblock[mb].type].atoms;
981 excl = &mtop->moltype[mtop->molblock[mb].type].excls;
982 for (i = 0; (i < atoms->nr); i++)
986 tpi = atoms->atom[i].type;
990 tpi = atoms->atom[i].typeB;
993 j2 = excl->index[i+1];
994 for (j = j1; j < j2; j++)
1001 tpj = atoms->atom[k].type;
1005 tpj = atoms->atom[k].typeB;
1009 /* nbfp now includes the 6.0 derivative prefactor */
1010 csix -= nmol*BHAMC(nbfp, ntp, tpi, tpj)/6.0;
1014 /* nbfp now includes the 6.0/12.0 derivative prefactors */
1015 csix -= nmol*C6 (nbfp, ntp, tpi, tpj)/6.0;
1016 ctwelve -= nmol*C12(nbfp, ntp, tpi, tpj)/12.0;
1026 /* Only correct for the interaction of the test particle
1027 * with the rest of the system.
1030 &mtop->moltype[mtop->molblock[mtop->nmolblock-1].type].atoms;
1033 for (mb = 0; mb < mtop->nmolblock; mb++)
1035 nmol = mtop->molblock[mb].nmol;
1036 atoms = &mtop->moltype[mtop->molblock[mb].type].atoms;
1037 for (j = 0; j < atoms->nr; j++)
1040 /* Remove the interaction of the test charge group
1043 if (mb == mtop->nmolblock-1)
1047 if (mb == 0 && nmol == 1)
1049 gmx_fatal(FARGS, "Old format tpr with TPI, please generate a new tpr file");
1054 tpj = atoms->atom[j].type;
1058 tpj = atoms->atom[j].typeB;
1060 for (i = 0; i < fr->n_tpi; i++)
1064 tpi = atoms_tpi->atom[i].type;
1068 tpi = atoms_tpi->atom[i].typeB;
1072 /* nbfp now includes the 6.0 derivative prefactor */
1073 csix += nmolc*BHAMC(nbfp, ntp, tpi, tpj)/6.0;
1077 /* nbfp now includes the 6.0/12.0 derivative prefactors */
1078 csix += nmolc*C6 (nbfp, ntp, tpi, tpj)/6.0;
1079 ctwelve += nmolc*C12(nbfp, ntp, tpi, tpj)/12.0;
1086 if (npair - nexcl <= 0 && fplog)
1088 fprintf(fplog, "\nWARNING: There are no atom pairs for dispersion correction\n\n");
1094 csix /= npair - nexcl;
1095 ctwelve /= npair - nexcl;
1099 fprintf(debug, "Counted %d exclusions\n", nexcl);
1100 fprintf(debug, "Average C6 parameter is: %10g\n", (double)csix);
1101 fprintf(debug, "Average C12 parameter is: %10g\n", (double)ctwelve);
1103 fr->avcsix[q] = csix;
1104 fr->avctwelve[q] = ctwelve;
1108 if (fr->eDispCorr == edispcAllEner ||
1109 fr->eDispCorr == edispcAllEnerPres)
1111 fprintf(fplog, "Long Range LJ corr.: <C6> %10.4e, <C12> %10.4e\n",
1112 fr->avcsix[0], fr->avctwelve[0]);
1116 fprintf(fplog, "Long Range LJ corr.: <C6> %10.4e\n", fr->avcsix[0]);
1122 static void set_bham_b_max(FILE *fplog, t_forcerec *fr,
1123 const gmx_mtop_t *mtop)
1125 const t_atoms *at1, *at2;
1126 int mt1, mt2, i, j, tpi, tpj, ntypes;
1132 fprintf(fplog, "Determining largest Buckingham b parameter for table\n");
1139 for (mt1 = 0; mt1 < mtop->nmoltype; mt1++)
1141 at1 = &mtop->moltype[mt1].atoms;
1142 for (i = 0; (i < at1->nr); i++)
1144 tpi = at1->atom[i].type;
1147 gmx_fatal(FARGS, "Atomtype[%d] = %d, maximum = %d", i, tpi, ntypes);
1150 for (mt2 = mt1; mt2 < mtop->nmoltype; mt2++)
1152 at2 = &mtop->moltype[mt2].atoms;
1153 for (j = 0; (j < at2->nr); j++)
1155 tpj = at2->atom[j].type;
1158 gmx_fatal(FARGS, "Atomtype[%d] = %d, maximum = %d", j, tpj, ntypes);
1160 b = BHAMB(nbfp, ntypes, tpi, tpj);
1161 if (b > fr->bham_b_max)
1165 if ((b < bmin) || (bmin == -1))
1175 fprintf(fplog, "Buckingham b parameters, min: %g, max: %g\n",
1176 bmin, fr->bham_b_max);
1180 static void make_nbf_tables(FILE *fp, const output_env_t oenv,
1181 t_forcerec *fr, real rtab,
1182 const t_commrec *cr,
1183 const char *tabfn, char *eg1, char *eg2,
1193 fprintf(debug, "No table file name passed, can not read table, can not do non-bonded interactions\n");
1198 sprintf(buf, "%s", tabfn);
1201 /* Append the two energy group names */
1202 sprintf(buf + strlen(tabfn) - strlen(ftp2ext(efXVG)) - 1, "_%s_%s.%s",
1203 eg1, eg2, ftp2ext(efXVG));
1205 nbl->table_elec_vdw = make_tables(fp, oenv, fr, MASTER(cr), buf, rtab, 0);
1206 /* Copy the contents of the table to separate coulomb and LJ tables too,
1207 * to improve cache performance.
1209 /* For performance reasons we want
1210 * the table data to be aligned to 16-byte. The pointers could be freed
1211 * but currently aren't.
1213 nbl->table_elec.interaction = GMX_TABLE_INTERACTION_ELEC;
1214 nbl->table_elec.format = nbl->table_elec_vdw.format;
1215 nbl->table_elec.r = nbl->table_elec_vdw.r;
1216 nbl->table_elec.n = nbl->table_elec_vdw.n;
1217 nbl->table_elec.scale = nbl->table_elec_vdw.scale;
1218 nbl->table_elec.scale_exp = nbl->table_elec_vdw.scale_exp;
1219 nbl->table_elec.formatsize = nbl->table_elec_vdw.formatsize;
1220 nbl->table_elec.ninteractions = 1;
1221 nbl->table_elec.stride = nbl->table_elec.formatsize * nbl->table_elec.ninteractions;
1222 snew_aligned(nbl->table_elec.data, nbl->table_elec.stride*(nbl->table_elec.n+1), 32);
1224 nbl->table_vdw.interaction = GMX_TABLE_INTERACTION_VDWREP_VDWDISP;
1225 nbl->table_vdw.format = nbl->table_elec_vdw.format;
1226 nbl->table_vdw.r = nbl->table_elec_vdw.r;
1227 nbl->table_vdw.n = nbl->table_elec_vdw.n;
1228 nbl->table_vdw.scale = nbl->table_elec_vdw.scale;
1229 nbl->table_vdw.scale_exp = nbl->table_elec_vdw.scale_exp;
1230 nbl->table_vdw.formatsize = nbl->table_elec_vdw.formatsize;
1231 nbl->table_vdw.ninteractions = 2;
1232 nbl->table_vdw.stride = nbl->table_vdw.formatsize * nbl->table_vdw.ninteractions;
1233 snew_aligned(nbl->table_vdw.data, nbl->table_vdw.stride*(nbl->table_vdw.n+1), 32);
1235 for (i = 0; i <= nbl->table_elec_vdw.n; i++)
1237 for (j = 0; j < 4; j++)
1239 nbl->table_elec.data[4*i+j] = nbl->table_elec_vdw.data[12*i+j];
1241 for (j = 0; j < 8; j++)
1243 nbl->table_vdw.data[8*i+j] = nbl->table_elec_vdw.data[12*i+4+j];
1248 static void count_tables(int ftype1, int ftype2, const gmx_mtop_t *mtop,
1249 int *ncount, int **count)
1251 const gmx_moltype_t *molt;
1253 int mt, ftype, stride, i, j, tabnr;
1255 for (mt = 0; mt < mtop->nmoltype; mt++)
1257 molt = &mtop->moltype[mt];
1258 for (ftype = 0; ftype < F_NRE; ftype++)
1260 if (ftype == ftype1 || ftype == ftype2)
1262 il = &molt->ilist[ftype];
1263 stride = 1 + NRAL(ftype);
1264 for (i = 0; i < il->nr; i += stride)
1266 tabnr = mtop->ffparams.iparams[il->iatoms[i]].tab.table;
1269 gmx_fatal(FARGS, "A bonded table number is smaller than 0: %d\n", tabnr);
1271 if (tabnr >= *ncount)
1273 srenew(*count, tabnr+1);
1274 for (j = *ncount; j < tabnr+1; j++)
1287 static bondedtable_t *make_bonded_tables(FILE *fplog,
1288 int ftype1, int ftype2,
1289 const gmx_mtop_t *mtop,
1290 const char *basefn, const char *tabext)
1292 int i, ncount, *count;
1300 count_tables(ftype1, ftype2, mtop, &ncount, &count);
1305 for (i = 0; i < ncount; i++)
1309 sprintf(tabfn, "%s", basefn);
1310 sprintf(tabfn + strlen(basefn) - strlen(ftp2ext(efXVG)) - 1, "_%s%d.%s",
1311 tabext, i, ftp2ext(efXVG));
1312 tab[i] = make_bonded_table(fplog, tabfn, NRAL(ftype1)-2);
1321 void forcerec_set_ranges(t_forcerec *fr,
1322 int ncg_home, int ncg_force,
1324 int natoms_force_constr, int natoms_f_novirsum)
1329 /* fr->ncg_force is unused in the standard code,
1330 * but it can be useful for modified code dealing with charge groups.
1332 fr->ncg_force = ncg_force;
1333 fr->natoms_force = natoms_force;
1334 fr->natoms_force_constr = natoms_force_constr;
1336 if (fr->natoms_force_constr > fr->nalloc_force)
1338 fr->nalloc_force = over_alloc_dd(fr->natoms_force_constr);
1342 srenew(fr->f_twin, fr->nalloc_force);
1346 if (fr->bF_NoVirSum)
1348 fr->f_novirsum_n = natoms_f_novirsum;
1349 if (fr->f_novirsum_n > fr->f_novirsum_nalloc)
1351 fr->f_novirsum_nalloc = over_alloc_dd(fr->f_novirsum_n);
1352 srenew(fr->f_novirsum_alloc, fr->f_novirsum_nalloc);
1357 fr->f_novirsum_n = 0;
1361 static real cutoff_inf(real cutoff)
1365 cutoff = GMX_CUTOFF_INF;
1371 static void make_adress_tf_tables(FILE *fp, const output_env_t oenv,
1372 t_forcerec *fr, const t_inputrec *ir,
1373 const char *tabfn, const gmx_mtop_t *mtop,
1381 gmx_fatal(FARGS, "No thermoforce table file given. Use -tabletf to specify a file\n");
1385 snew(fr->atf_tabs, ir->adress->n_tf_grps);
1387 sprintf(buf, "%s", tabfn);
1388 for (i = 0; i < ir->adress->n_tf_grps; i++)
1390 j = ir->adress->tf_table_index[i]; /* get energy group index */
1391 sprintf(buf + strlen(tabfn) - strlen(ftp2ext(efXVG)) - 1, "tf_%s.%s",
1392 *(mtop->groups.grpname[mtop->groups.grps[egcENER].nm_ind[j]]), ftp2ext(efXVG));
1395 fprintf(fp, "loading tf table for energygrp index %d from %s\n", ir->adress->tf_table_index[i], buf);
1397 fr->atf_tabs[i] = make_atf_table(fp, oenv, fr, buf, box);
1402 gmx_bool can_use_allvsall(const t_inputrec *ir, gmx_bool bPrintNote, t_commrec *cr, FILE *fp)
1409 ir->rcoulomb == 0 &&
1411 ir->ePBC == epbcNONE &&
1412 ir->vdwtype == evdwCUT &&
1413 ir->coulombtype == eelCUT &&
1414 ir->efep == efepNO &&
1415 (ir->implicit_solvent == eisNO ||
1416 (ir->implicit_solvent == eisGBSA && (ir->gb_algorithm == egbSTILL ||
1417 ir->gb_algorithm == egbHCT ||
1418 ir->gb_algorithm == egbOBC))) &&
1419 getenv("GMX_NO_ALLVSALL") == NULL
1422 if (bAllvsAll && ir->opts.ngener > 1)
1424 const char *note = "NOTE: Can not use all-vs-all force loops, because there are multiple energy monitor groups; you might get significantly higher performance when using only a single energy monitor group.\n";
1430 fprintf(stderr, "\n%s\n", note);
1434 fprintf(fp, "\n%s\n", note);
1440 if (bAllvsAll && fp && MASTER(cr))
1442 fprintf(fp, "\nUsing accelerated all-vs-all kernels.\n\n");
1449 static void init_forcerec_f_threads(t_forcerec *fr, int nenergrp)
1453 /* These thread local data structures are used for bondeds only */
1454 fr->nthreads = gmx_omp_nthreads_get(emntBonded);
1456 if (fr->nthreads > 1)
1458 snew(fr->f_t, fr->nthreads);
1459 /* Thread 0 uses the global force and energy arrays */
1460 for (t = 1; t < fr->nthreads; t++)
1462 fr->f_t[t].f = NULL;
1463 fr->f_t[t].f_nalloc = 0;
1464 snew(fr->f_t[t].fshift, SHIFTS);
1465 fr->f_t[t].grpp.nener = nenergrp*nenergrp;
1466 for (i = 0; i < egNR; i++)
1468 snew(fr->f_t[t].grpp.ener[i], fr->f_t[t].grpp.nener);
1475 static void pick_nbnxn_kernel_cpu(const t_inputrec gmx_unused *ir,
1479 *kernel_type = nbnxnk4x4_PlainC;
1480 *ewald_excl = ewaldexclTable;
1482 #ifdef GMX_NBNXN_SIMD
1484 #ifdef GMX_NBNXN_SIMD_4XN
1485 *kernel_type = nbnxnk4xN_SIMD_4xN;
1487 #ifdef GMX_NBNXN_SIMD_2XNN
1488 /* We expect the 2xNN kernels to be faster in most cases */
1489 *kernel_type = nbnxnk4xN_SIMD_2xNN;
1492 #if defined GMX_NBNXN_SIMD_4XN && defined GMX_X86_AVX_256
1493 if (EEL_RF(ir->coulombtype) || ir->coulombtype == eelCUT)
1495 /* The raw pair rate of the 4x8 kernel is higher than 2x(4+4),
1496 * 10% with HT, 50% without HT, but extra zeros interactions
1497 * can compensate. As we currently don't detect the actual use
1498 * of HT, switch to 4x8 to avoid a potential performance hit.
1500 *kernel_type = nbnxnk4xN_SIMD_4xN;
1503 if (getenv("GMX_NBNXN_SIMD_4XN") != NULL)
1505 #ifdef GMX_NBNXN_SIMD_4XN
1506 *kernel_type = nbnxnk4xN_SIMD_4xN;
1508 gmx_fatal(FARGS, "SIMD 4xN kernels requested, but Gromacs has been compiled without support for these kernels");
1511 if (getenv("GMX_NBNXN_SIMD_2XNN") != NULL)
1513 #ifdef GMX_NBNXN_SIMD_2XNN
1514 *kernel_type = nbnxnk4xN_SIMD_2xNN;
1516 gmx_fatal(FARGS, "SIMD 2x(N+N) kernels requested, but Gromacs has been compiled without support for these kernels");
1520 /* Analytical Ewald exclusion correction is only an option in
1521 * the SIMD kernel. On BlueGene/Q, this is faster regardless
1522 * of precision. In single precision, this is faster on
1523 * Bulldozer, and slightly faster on Sandy Bridge.
1525 #if ((defined GMX_X86_AVX_128_FMA || defined GMX_X86_AVX_256) && !defined GMX_DOUBLE) || (defined GMX_CPU_ACCELERATION_IBM_QPX)
1526 *ewald_excl = ewaldexclAnalytical;
1528 if (getenv("GMX_NBNXN_EWALD_TABLE") != NULL)
1530 *ewald_excl = ewaldexclTable;
1532 if (getenv("GMX_NBNXN_EWALD_ANALYTICAL") != NULL)
1534 *ewald_excl = ewaldexclAnalytical;
1538 #endif /* GMX_NBNXN_SIMD */
1542 const char *lookup_nbnxn_kernel_name(int kernel_type)
1544 const char *returnvalue = NULL;
1545 switch (kernel_type)
1548 returnvalue = "not set";
1550 case nbnxnk4x4_PlainC:
1551 returnvalue = "plain C";
1553 case nbnxnk4xN_SIMD_4xN:
1554 case nbnxnk4xN_SIMD_2xNN:
1555 #ifdef GMX_NBNXN_SIMD
1557 /* We have x86 SSE2 compatible SIMD */
1558 #ifdef GMX_X86_AVX_128_FMA
1559 returnvalue = "AVX-128-FMA";
1561 #if defined GMX_X86_AVX_256 || defined __AVX__
1562 /* x86 SIMD intrinsics can be converted to SSE or AVX depending
1563 * on compiler flags. As we use nearly identical intrinsics,
1564 * compiling for AVX without an AVX macros effectively results
1566 * For gcc we check for __AVX__
1567 * At least a check for icc should be added (if there is a macro)
1569 #if defined GMX_X86_AVX_256 && !defined GMX_NBNXN_HALF_WIDTH_SIMD
1570 returnvalue = "AVX-256";
1572 returnvalue = "AVX-128";
1575 #ifdef GMX_X86_SSE4_1
1576 returnvalue = "SSE4.1";
1578 returnvalue = "SSE2";
1582 #else /* GMX_X86_SSE2 */
1583 /* not GMX_X86_SSE2, but other SIMD */
1584 returnvalue = "SIMD";
1585 #endif /* GMX_X86_SSE2 */
1586 #else /* GMX_NBNXN_SIMD */
1587 returnvalue = "not available";
1588 #endif /* GMX_NBNXN_SIMD */
1590 case nbnxnk8x8x8_CUDA: returnvalue = "CUDA"; break;
1591 case nbnxnk8x8x8_PlainC: returnvalue = "plain C"; break;
1595 gmx_fatal(FARGS, "Illegal kernel type selected");
1602 static void pick_nbnxn_kernel(FILE *fp,
1603 const t_commrec *cr,
1604 gmx_bool use_cpu_acceleration,
1606 gmx_bool bEmulateGPU,
1607 const t_inputrec *ir,
1610 gmx_bool bDoNonbonded)
1612 assert(kernel_type);
1614 *kernel_type = nbnxnkNotSet;
1615 *ewald_excl = ewaldexclTable;
1619 *kernel_type = nbnxnk8x8x8_PlainC;
1623 md_print_warn(cr, fp, "Emulating a GPU run on the CPU (slow)");
1628 *kernel_type = nbnxnk8x8x8_CUDA;
1631 if (*kernel_type == nbnxnkNotSet)
1633 if (use_cpu_acceleration)
1635 pick_nbnxn_kernel_cpu(ir, kernel_type, ewald_excl);
1639 *kernel_type = nbnxnk4x4_PlainC;
1643 if (bDoNonbonded && fp != NULL)
1645 fprintf(fp, "\nUsing %s %dx%d non-bonded kernels\n\n",
1646 lookup_nbnxn_kernel_name(*kernel_type),
1647 nbnxn_kernel_pairlist_simple(*kernel_type) ? NBNXN_CPU_CLUSTER_I_SIZE : NBNXN_GPU_CLUSTER_SIZE,
1648 nbnxn_kernel_to_cj_size(*kernel_type));
1652 static void pick_nbnxn_resources(const t_commrec *cr,
1653 const gmx_hw_info_t *hwinfo,
1654 gmx_bool bDoNonbonded,
1656 gmx_bool *bEmulateGPU)
1658 gmx_bool bEmulateGPUEnvVarSet;
1659 char gpu_err_str[STRLEN];
1663 bEmulateGPUEnvVarSet = (getenv("GMX_EMULATE_GPU") != NULL);
1665 /* Run GPU emulation mode if GMX_EMULATE_GPU is defined. Because
1666 * GPUs (currently) only handle non-bonded calculations, we will
1667 * automatically switch to emulation if non-bonded calculations are
1668 * turned off via GMX_NO_NONBONDED - this is the simple and elegant
1669 * way to turn off GPU initialization, data movement, and cleanup.
1671 * GPU emulation can be useful to assess the performance one can expect by
1672 * adding GPU(s) to the machine. The conditional below allows this even
1673 * if mdrun is compiled without GPU acceleration support.
1674 * Note that you should freezing the system as otherwise it will explode.
1676 *bEmulateGPU = (bEmulateGPUEnvVarSet ||
1677 (!bDoNonbonded && hwinfo->bCanUseGPU));
1679 /* Enable GPU mode when GPUs are available or no GPU emulation is requested.
1681 if (hwinfo->bCanUseGPU && !(*bEmulateGPU))
1683 /* Each PP node will use the intra-node id-th device from the
1684 * list of detected/selected GPUs. */
1685 if (!init_gpu(cr->rank_pp_intranode, gpu_err_str, &hwinfo->gpu_info))
1687 /* At this point the init should never fail as we made sure that
1688 * we have all the GPUs we need. If it still does, we'll bail. */
1689 gmx_fatal(FARGS, "On node %d failed to initialize GPU #%d: %s",
1691 get_gpu_device_id(&hwinfo->gpu_info, cr->rank_pp_intranode),
1695 /* Here we actually turn on hardware GPU acceleration */
1700 gmx_bool uses_simple_tables(int cutoff_scheme,
1701 nonbonded_verlet_t *nbv,
1704 gmx_bool bUsesSimpleTables = TRUE;
1707 switch (cutoff_scheme)
1710 bUsesSimpleTables = TRUE;
1713 assert(NULL != nbv && NULL != nbv->grp);
1714 grp_index = (group < 0) ? 0 : (nbv->ngrp - 1);
1715 bUsesSimpleTables = nbnxn_kernel_pairlist_simple(nbv->grp[grp_index].kernel_type);
1718 gmx_incons("unimplemented");
1720 return bUsesSimpleTables;
1723 static void init_ewald_f_table(interaction_const_t *ic,
1724 gmx_bool bUsesSimpleTables,
1729 if (bUsesSimpleTables)
1731 /* With a spacing of 0.0005 we are at the force summation accuracy
1732 * for the SSE kernels for "normal" atomistic simulations.
1734 ic->tabq_scale = ewald_spline3_table_scale(ic->ewaldcoeff,
1737 maxr = (rtab > ic->rcoulomb) ? rtab : ic->rcoulomb;
1738 ic->tabq_size = (int)(maxr*ic->tabq_scale) + 2;
1742 ic->tabq_size = GPU_EWALD_COULOMB_FORCE_TABLE_SIZE;
1743 /* Subtract 2 iso 1 to avoid access out of range due to rounding */
1744 ic->tabq_scale = (ic->tabq_size - 2)/ic->rcoulomb;
1747 sfree_aligned(ic->tabq_coul_FDV0);
1748 sfree_aligned(ic->tabq_coul_F);
1749 sfree_aligned(ic->tabq_coul_V);
1751 /* Create the original table data in FDV0 */
1752 snew_aligned(ic->tabq_coul_FDV0, ic->tabq_size*4, 32);
1753 snew_aligned(ic->tabq_coul_F, ic->tabq_size, 32);
1754 snew_aligned(ic->tabq_coul_V, ic->tabq_size, 32);
1755 table_spline3_fill_ewald_lr(ic->tabq_coul_F, ic->tabq_coul_V, ic->tabq_coul_FDV0,
1756 ic->tabq_size, 1/ic->tabq_scale, ic->ewaldcoeff);
1759 void init_interaction_const_tables(FILE *fp,
1760 interaction_const_t *ic,
1761 gmx_bool bUsesSimpleTables,
1766 if (ic->eeltype == eelEWALD || EEL_PME(ic->eeltype))
1768 init_ewald_f_table(ic, bUsesSimpleTables, rtab);
1772 fprintf(fp, "Initialized non-bonded Ewald correction tables, spacing: %.2e size: %d\n\n",
1773 1/ic->tabq_scale, ic->tabq_size);
1778 void init_interaction_const(FILE *fp,
1779 interaction_const_t **interaction_const,
1780 const t_forcerec *fr,
1783 interaction_const_t *ic;
1784 gmx_bool bUsesSimpleTables = TRUE;
1788 /* Just allocate something so we can free it */
1789 snew_aligned(ic->tabq_coul_FDV0, 16, 32);
1790 snew_aligned(ic->tabq_coul_F, 16, 32);
1791 snew_aligned(ic->tabq_coul_V, 16, 32);
1793 ic->rlist = fr->rlist;
1794 ic->rlistlong = fr->rlistlong;
1797 ic->rvdw = fr->rvdw;
1798 if (fr->vdw_modifier == eintmodPOTSHIFT)
1800 ic->sh_invrc6 = pow(ic->rvdw, -6.0);
1807 /* Electrostatics */
1808 ic->eeltype = fr->eeltype;
1809 ic->rcoulomb = fr->rcoulomb;
1810 ic->epsilon_r = fr->epsilon_r;
1811 ic->epsfac = fr->epsfac;
1814 ic->ewaldcoeff = fr->ewaldcoeff;
1815 if (fr->coulomb_modifier == eintmodPOTSHIFT)
1817 ic->sh_ewald = gmx_erfc(ic->ewaldcoeff*ic->rcoulomb);
1824 /* Reaction-field */
1825 if (EEL_RF(ic->eeltype))
1827 ic->epsilon_rf = fr->epsilon_rf;
1828 ic->k_rf = fr->k_rf;
1829 ic->c_rf = fr->c_rf;
1833 /* For plain cut-off we might use the reaction-field kernels */
1834 ic->epsilon_rf = ic->epsilon_r;
1836 if (fr->coulomb_modifier == eintmodPOTSHIFT)
1838 ic->c_rf = 1/ic->rcoulomb;
1848 fprintf(fp, "Potential shift: LJ r^-12: %.3f r^-6 %.3f",
1849 sqr(ic->sh_invrc6), ic->sh_invrc6);
1850 if (ic->eeltype == eelCUT)
1852 fprintf(fp, ", Coulomb %.3f", ic->c_rf);
1854 else if (EEL_PME(ic->eeltype))
1856 fprintf(fp, ", Ewald %.3e", ic->sh_ewald);
1861 *interaction_const = ic;
1863 if (fr->nbv != NULL && fr->nbv->bUseGPU)
1865 nbnxn_cuda_init_const(fr->nbv->cu_nbv, ic, fr->nbv->grp);
1868 bUsesSimpleTables = uses_simple_tables(fr->cutoff_scheme, fr->nbv, -1);
1869 init_interaction_const_tables(fp, ic, bUsesSimpleTables, rtab);
1872 static void init_nb_verlet(FILE *fp,
1873 nonbonded_verlet_t **nb_verlet,
1874 const t_inputrec *ir,
1875 const t_forcerec *fr,
1876 const t_commrec *cr,
1877 const char *nbpu_opt)
1879 nonbonded_verlet_t *nbv;
1882 gmx_bool bEmulateGPU, bHybridGPURun = FALSE;
1884 nbnxn_alloc_t *nb_alloc;
1885 nbnxn_free_t *nb_free;
1889 pick_nbnxn_resources(cr, fr->hwinfo,
1896 nbv->ngrp = (DOMAINDECOMP(cr) ? 2 : 1);
1897 for (i = 0; i < nbv->ngrp; i++)
1899 nbv->grp[i].nbl_lists.nnbl = 0;
1900 nbv->grp[i].nbat = NULL;
1901 nbv->grp[i].kernel_type = nbnxnkNotSet;
1903 if (i == 0) /* local */
1905 pick_nbnxn_kernel(fp, cr, fr->use_cpu_acceleration,
1906 nbv->bUseGPU, bEmulateGPU, ir,
1907 &nbv->grp[i].kernel_type,
1908 &nbv->grp[i].ewald_excl,
1911 else /* non-local */
1913 if (nbpu_opt != NULL && strcmp(nbpu_opt, "gpu_cpu") == 0)
1915 /* Use GPU for local, select a CPU kernel for non-local */
1916 pick_nbnxn_kernel(fp, cr, fr->use_cpu_acceleration,
1918 &nbv->grp[i].kernel_type,
1919 &nbv->grp[i].ewald_excl,
1922 bHybridGPURun = TRUE;
1926 /* Use the same kernel for local and non-local interactions */
1927 nbv->grp[i].kernel_type = nbv->grp[0].kernel_type;
1928 nbv->grp[i].ewald_excl = nbv->grp[0].ewald_excl;
1935 /* init the NxN GPU data; the last argument tells whether we'll have
1936 * both local and non-local NB calculation on GPU */
1937 nbnxn_cuda_init(fp, &nbv->cu_nbv,
1938 &fr->hwinfo->gpu_info, cr->rank_pp_intranode,
1939 (nbv->ngrp > 1) && !bHybridGPURun);
1941 if ((env = getenv("GMX_NB_MIN_CI")) != NULL)
1945 nbv->min_ci_balanced = strtol(env, &end, 10);
1946 if (!end || (*end != 0) || nbv->min_ci_balanced <= 0)
1948 gmx_fatal(FARGS, "Invalid value passed in GMX_NB_MIN_CI=%s, positive integer required", env);
1953 fprintf(debug, "Neighbor-list balancing parameter: %d (passed as env. var.)\n",
1954 nbv->min_ci_balanced);
1959 nbv->min_ci_balanced = nbnxn_cuda_min_ci_balanced(nbv->cu_nbv);
1962 fprintf(debug, "Neighbor-list balancing parameter: %d (auto-adjusted to the number of GPU multi-processors)\n",
1963 nbv->min_ci_balanced);
1969 nbv->min_ci_balanced = 0;
1974 nbnxn_init_search(&nbv->nbs,
1975 DOMAINDECOMP(cr) ? &cr->dd->nc : NULL,
1976 DOMAINDECOMP(cr) ? domdec_zones(cr->dd) : NULL,
1977 gmx_omp_nthreads_get(emntNonbonded));
1979 for (i = 0; i < nbv->ngrp; i++)
1981 if (nbv->grp[0].kernel_type == nbnxnk8x8x8_CUDA)
1983 nb_alloc = &pmalloc;
1992 nbnxn_init_pairlist_set(&nbv->grp[i].nbl_lists,
1993 nbnxn_kernel_pairlist_simple(nbv->grp[i].kernel_type),
1994 /* 8x8x8 "non-simple" lists are ATM always combined */
1995 !nbnxn_kernel_pairlist_simple(nbv->grp[i].kernel_type),
1999 nbv->grp[0].kernel_type != nbv->grp[i].kernel_type)
2001 snew(nbv->grp[i].nbat, 1);
2002 nbnxn_atomdata_init(fp,
2004 nbv->grp[i].kernel_type,
2005 fr->ntype, fr->nbfp,
2007 nbnxn_kernel_pairlist_simple(nbv->grp[i].kernel_type) ? gmx_omp_nthreads_get(emntNonbonded) : 1,
2012 nbv->grp[i].nbat = nbv->grp[0].nbat;
2017 void init_forcerec(FILE *fp,
2018 const output_env_t oenv,
2021 const t_inputrec *ir,
2022 const gmx_mtop_t *mtop,
2023 const t_commrec *cr,
2029 const char *nbpu_opt,
2030 gmx_bool bNoSolvOpt,
2033 int i, j, m, natoms, ngrp, negp_pp, negptable, egi, egj;
2038 gmx_bool bGenericKernelOnly;
2039 gmx_bool bTab, bSep14tab, bNormalnblists;
2041 int *nm_ind, egp_flags;
2043 if (fr->hwinfo == NULL)
2045 /* Detect hardware, gather information.
2046 * In mdrun, hwinfo has already been set before calling init_forcerec.
2047 * Here we ignore GPUs, as tools will not use them anyhow.
2049 fr->hwinfo = gmx_detect_hardware(fp, cr, FALSE, FALSE, NULL);
2052 /* By default we turn acceleration on, but it might be turned off further down... */
2053 fr->use_cpu_acceleration = TRUE;
2055 fr->bDomDec = DOMAINDECOMP(cr);
2057 natoms = mtop->natoms;
2059 if (check_box(ir->ePBC, box))
2061 gmx_fatal(FARGS, check_box(ir->ePBC, box));
2064 /* Test particle insertion ? */
2067 /* Set to the size of the molecule to be inserted (the last one) */
2068 /* Because of old style topologies, we have to use the last cg
2069 * instead of the last molecule type.
2071 cgs = &mtop->moltype[mtop->molblock[mtop->nmolblock-1].type].cgs;
2072 fr->n_tpi = cgs->index[cgs->nr] - cgs->index[cgs->nr-1];
2073 if (fr->n_tpi != mtop->mols.index[mtop->mols.nr] - mtop->mols.index[mtop->mols.nr-1])
2075 gmx_fatal(FARGS, "The molecule to insert can not consist of multiple charge groups.\nMake it a single charge group.");
2083 /* Copy AdResS parameters */
2086 fr->adress_type = ir->adress->type;
2087 fr->adress_const_wf = ir->adress->const_wf;
2088 fr->adress_ex_width = ir->adress->ex_width;
2089 fr->adress_hy_width = ir->adress->hy_width;
2090 fr->adress_icor = ir->adress->icor;
2091 fr->adress_site = ir->adress->site;
2092 fr->adress_ex_forcecap = ir->adress->ex_forcecap;
2093 fr->adress_do_hybridpairs = ir->adress->do_hybridpairs;
2096 snew(fr->adress_group_explicit, ir->adress->n_energy_grps);
2097 for (i = 0; i < ir->adress->n_energy_grps; i++)
2099 fr->adress_group_explicit[i] = ir->adress->group_explicit[i];
2102 fr->n_adress_tf_grps = ir->adress->n_tf_grps;
2103 snew(fr->adress_tf_table_index, fr->n_adress_tf_grps);
2104 for (i = 0; i < fr->n_adress_tf_grps; i++)
2106 fr->adress_tf_table_index[i] = ir->adress->tf_table_index[i];
2108 copy_rvec(ir->adress->refs, fr->adress_refs);
2112 fr->adress_type = eAdressOff;
2113 fr->adress_do_hybridpairs = FALSE;
2116 /* Copy the user determined parameters */
2117 fr->userint1 = ir->userint1;
2118 fr->userint2 = ir->userint2;
2119 fr->userint3 = ir->userint3;
2120 fr->userint4 = ir->userint4;
2121 fr->userreal1 = ir->userreal1;
2122 fr->userreal2 = ir->userreal2;
2123 fr->userreal3 = ir->userreal3;
2124 fr->userreal4 = ir->userreal4;
2127 fr->fc_stepsize = ir->fc_stepsize;
2130 fr->efep = ir->efep;
2131 fr->sc_alphavdw = ir->fepvals->sc_alpha;
2132 if (ir->fepvals->bScCoul)
2134 fr->sc_alphacoul = ir->fepvals->sc_alpha;
2135 fr->sc_sigma6_min = pow(ir->fepvals->sc_sigma_min, 6);
2139 fr->sc_alphacoul = 0;
2140 fr->sc_sigma6_min = 0; /* only needed when bScCoul is on */
2142 fr->sc_power = ir->fepvals->sc_power;
2143 fr->sc_r_power = ir->fepvals->sc_r_power;
2144 fr->sc_sigma6_def = pow(ir->fepvals->sc_sigma, 6);
2146 env = getenv("GMX_SCSIGMA_MIN");
2150 sscanf(env, "%lf", &dbl);
2151 fr->sc_sigma6_min = pow(dbl, 6);
2154 fprintf(fp, "Setting the minimum soft core sigma to %g nm\n", dbl);
2158 fr->bNonbonded = TRUE;
2159 if (getenv("GMX_NO_NONBONDED") != NULL)
2161 /* turn off non-bonded calculations */
2162 fr->bNonbonded = FALSE;
2163 md_print_warn(cr, fp,
2164 "Found environment variable GMX_NO_NONBONDED.\n"
2165 "Disabling nonbonded calculations.\n");
2168 bGenericKernelOnly = FALSE;
2170 /* We now check in the NS code whether a particular combination of interactions
2171 * can be used with water optimization, and disable it if that is not the case.
2174 if (getenv("GMX_NB_GENERIC") != NULL)
2179 "Found environment variable GMX_NB_GENERIC.\n"
2180 "Disabling all interaction-specific nonbonded kernels, will only\n"
2181 "use the slow generic ones in src/gmxlib/nonbonded/nb_generic.c\n\n");
2183 bGenericKernelOnly = TRUE;
2186 if (bGenericKernelOnly == TRUE)
2191 if ( (getenv("GMX_DISABLE_CPU_ACCELERATION") != NULL) || (getenv("GMX_NOOPTIMIZEDKERNELS") != NULL) )
2193 fr->use_cpu_acceleration = FALSE;
2197 "\nFound environment variable GMX_DISABLE_CPU_ACCELERATION.\n"
2198 "Disabling all CPU architecture-specific (e.g. SSE2/SSE4/AVX) routines.\n\n");
2202 fr->bBHAM = (mtop->ffparams.functype[0] == F_BHAM);
2204 /* Check if we can/should do all-vs-all kernels */
2205 fr->bAllvsAll = can_use_allvsall(ir, FALSE, NULL, NULL);
2206 fr->AllvsAll_work = NULL;
2207 fr->AllvsAll_workgb = NULL;
2209 /* All-vs-all kernels have not been implemented in 4.6, and
2210 * the SIMD group kernels are also buggy in this case. Non-accelerated
2211 * group kernels are OK. See Redmine #1249. */
2214 fr->bAllvsAll = FALSE;
2215 fr->use_cpu_acceleration = FALSE;
2219 "\nYour simulation settings would have triggered the efficient all-vs-all\n"
2220 "kernels in GROMACS 4.5, but these have not been implemented in GROMACS\n"
2221 "4.6. Also, we can't use the accelerated SIMD kernels here because\n"
2222 "of an unfixed bug. The reference C kernels are correct, though, so\n"
2223 "we are proceeding by disabling all CPU architecture-specific\n"
2224 "(e.g. SSE2/SSE4/AVX) routines. If performance is important, please\n"
2225 "use GROMACS 4.5.7 or try cutoff-scheme = Verlet.\n\n");
2229 /* Neighbour searching stuff */
2230 fr->cutoff_scheme = ir->cutoff_scheme;
2231 fr->bGrid = (ir->ns_type == ensGRID);
2232 fr->ePBC = ir->ePBC;
2234 /* Determine if we will do PBC for distances in bonded interactions */
2235 if (fr->ePBC == epbcNONE)
2237 fr->bMolPBC = FALSE;
2241 if (!DOMAINDECOMP(cr))
2243 /* The group cut-off scheme and SHAKE assume charge groups
2244 * are whole, but not using molpbc is faster in most cases.
2246 if (fr->cutoff_scheme == ecutsGROUP ||
2247 (ir->eConstrAlg == econtSHAKE &&
2248 (gmx_mtop_ftype_count(mtop, F_CONSTR) > 0 ||
2249 gmx_mtop_ftype_count(mtop, F_CONSTRNC) > 0)))
2251 fr->bMolPBC = ir->bPeriodicMols;
2256 if (getenv("GMX_USE_GRAPH") != NULL)
2258 fr->bMolPBC = FALSE;
2261 fprintf(fp, "\nGMX_MOLPBC is set, using the graph for bonded interactions\n\n");
2268 fr->bMolPBC = dd_bonded_molpbc(cr->dd, fr->ePBC);
2271 fr->bGB = (ir->implicit_solvent == eisGBSA);
2273 fr->rc_scaling = ir->refcoord_scaling;
2274 copy_rvec(ir->posres_com, fr->posres_com);
2275 copy_rvec(ir->posres_comB, fr->posres_comB);
2276 fr->rlist = cutoff_inf(ir->rlist);
2277 fr->rlistlong = cutoff_inf(ir->rlistlong);
2278 fr->eeltype = ir->coulombtype;
2279 fr->vdwtype = ir->vdwtype;
2281 fr->coulomb_modifier = ir->coulomb_modifier;
2282 fr->vdw_modifier = ir->vdw_modifier;
2284 /* Electrostatics: Translate from interaction-setting-in-mdp-file to kernel interaction format */
2285 switch (fr->eeltype)
2288 fr->nbkernel_elec_interaction = (fr->bGB) ? GMX_NBKERNEL_ELEC_GENERALIZEDBORN : GMX_NBKERNEL_ELEC_COULOMB;
2294 fr->nbkernel_elec_interaction = GMX_NBKERNEL_ELEC_REACTIONFIELD;
2298 fr->nbkernel_elec_interaction = GMX_NBKERNEL_ELEC_REACTIONFIELD;
2299 fr->coulomb_modifier = eintmodEXACTCUTOFF;
2308 case eelPMEUSERSWITCH:
2309 fr->nbkernel_elec_interaction = GMX_NBKERNEL_ELEC_CUBICSPLINETABLE;
2314 fr->nbkernel_elec_interaction = GMX_NBKERNEL_ELEC_EWALD;
2318 gmx_fatal(FARGS, "Unsupported electrostatic interaction: %s", eel_names[fr->eeltype]);
2322 /* Vdw: Translate from mdp settings to kernel format */
2323 switch (fr->vdwtype)
2328 fr->nbkernel_vdw_interaction = GMX_NBKERNEL_VDW_BUCKINGHAM;
2332 fr->nbkernel_vdw_interaction = GMX_NBKERNEL_VDW_LENNARDJONES;
2339 case evdwENCADSHIFT:
2340 fr->nbkernel_vdw_interaction = GMX_NBKERNEL_VDW_CUBICSPLINETABLE;
2344 gmx_fatal(FARGS, "Unsupported vdw interaction: %s", evdw_names[fr->vdwtype]);
2348 /* These start out identical to ir, but might be altered if we e.g. tabulate the interaction in the kernel */
2349 fr->nbkernel_elec_modifier = fr->coulomb_modifier;
2350 fr->nbkernel_vdw_modifier = fr->vdw_modifier;
2352 fr->bTwinRange = fr->rlistlong > fr->rlist;
2353 fr->bEwald = (EEL_PME(fr->eeltype) || fr->eeltype == eelEWALD);
2355 fr->reppow = mtop->ffparams.reppow;
2357 if (ir->cutoff_scheme == ecutsGROUP)
2359 fr->bvdwtab = (fr->vdwtype != evdwCUT ||
2360 !gmx_within_tol(fr->reppow, 12.0, 10*GMX_DOUBLE_EPS));
2361 /* We have special kernels for standard Ewald and PME, but the pme-switch ones are tabulated above */
2362 fr->bcoultab = !(fr->eeltype == eelCUT ||
2363 fr->eeltype == eelEWALD ||
2364 fr->eeltype == eelPME ||
2365 fr->eeltype == eelRF ||
2366 fr->eeltype == eelRF_ZERO);
2368 /* If the user absolutely wants different switch/shift settings for coul/vdw, it is likely
2369 * going to be faster to tabulate the interaction than calling the generic kernel.
2371 if (fr->nbkernel_elec_modifier == eintmodPOTSWITCH && fr->nbkernel_vdw_modifier == eintmodPOTSWITCH)
2373 if ((fr->rcoulomb_switch != fr->rvdw_switch) || (fr->rcoulomb != fr->rvdw))
2375 fr->bcoultab = TRUE;
2378 else if ((fr->nbkernel_elec_modifier == eintmodPOTSHIFT && fr->nbkernel_vdw_modifier == eintmodPOTSHIFT) ||
2379 ((fr->nbkernel_elec_interaction == GMX_NBKERNEL_ELEC_REACTIONFIELD &&
2380 fr->nbkernel_elec_modifier == eintmodEXACTCUTOFF &&
2381 (fr->nbkernel_vdw_modifier == eintmodPOTSWITCH || fr->nbkernel_vdw_modifier == eintmodPOTSHIFT))))
2383 if (fr->rcoulomb != fr->rvdw)
2385 fr->bcoultab = TRUE;
2389 if (getenv("GMX_REQUIRE_TABLES"))
2392 fr->bcoultab = TRUE;
2397 fprintf(fp, "Table routines are used for coulomb: %s\n", bool_names[fr->bcoultab]);
2398 fprintf(fp, "Table routines are used for vdw: %s\n", bool_names[fr->bvdwtab ]);
2401 if (fr->bvdwtab == TRUE)
2403 fr->nbkernel_vdw_interaction = GMX_NBKERNEL_VDW_CUBICSPLINETABLE;
2404 fr->nbkernel_vdw_modifier = eintmodNONE;
2406 if (fr->bcoultab == TRUE)
2408 fr->nbkernel_elec_interaction = GMX_NBKERNEL_ELEC_CUBICSPLINETABLE;
2409 fr->nbkernel_elec_modifier = eintmodNONE;
2413 if (ir->cutoff_scheme == ecutsVERLET)
2415 if (!gmx_within_tol(fr->reppow, 12.0, 10*GMX_DOUBLE_EPS))
2417 gmx_fatal(FARGS, "Cut-off scheme %S only supports LJ repulsion power 12", ecutscheme_names[ir->cutoff_scheme]);
2419 fr->bvdwtab = FALSE;
2420 fr->bcoultab = FALSE;
2423 /* Tables are used for direct ewald sum */
2426 if (EEL_PME(ir->coulombtype))
2430 fprintf(fp, "Will do PME sum in reciprocal space.\n");
2432 if (ir->coulombtype == eelP3M_AD)
2434 please_cite(fp, "Hockney1988");
2435 please_cite(fp, "Ballenegger2012");
2439 please_cite(fp, "Essmann95a");
2442 if (ir->ewald_geometry == eewg3DC)
2446 fprintf(fp, "Using the Ewald3DC correction for systems with a slab geometry.\n");
2448 please_cite(fp, "In-Chul99a");
2451 fr->ewaldcoeff = calc_ewaldcoeff(ir->rcoulomb, ir->ewald_rtol);
2452 init_ewald_tab(&(fr->ewald_table), ir, fp);
2455 fprintf(fp, "Using a Gaussian width (1/beta) of %g nm for Ewald\n",
2460 /* Electrostatics */
2461 fr->epsilon_r = ir->epsilon_r;
2462 fr->epsilon_rf = ir->epsilon_rf;
2463 fr->fudgeQQ = mtop->ffparams.fudgeQQ;
2464 fr->rcoulomb_switch = ir->rcoulomb_switch;
2465 fr->rcoulomb = cutoff_inf(ir->rcoulomb);
2467 /* Parameters for generalized RF */
2471 if (fr->eeltype == eelGRF)
2473 init_generalized_rf(fp, mtop, ir, fr);
2476 fr->bF_NoVirSum = (EEL_FULL(fr->eeltype) ||
2477 gmx_mtop_ftype_count(mtop, F_POSRES) > 0 ||
2478 gmx_mtop_ftype_count(mtop, F_FBPOSRES) > 0 ||
2479 IR_ELEC_FIELD(*ir) ||
2480 (fr->adress_icor != eAdressICOff)
2483 if (fr->cutoff_scheme == ecutsGROUP &&
2484 ncg_mtop(mtop) > fr->cg_nalloc && !DOMAINDECOMP(cr))
2486 /* Count the total number of charge groups */
2487 fr->cg_nalloc = ncg_mtop(mtop);
2488 srenew(fr->cg_cm, fr->cg_nalloc);
2490 if (fr->shift_vec == NULL)
2492 snew(fr->shift_vec, SHIFTS);
2495 if (fr->fshift == NULL)
2497 snew(fr->fshift, SHIFTS);
2500 if (fr->nbfp == NULL)
2502 fr->ntype = mtop->ffparams.atnr;
2503 fr->nbfp = mk_nbfp(&mtop->ffparams, fr->bBHAM);
2506 /* Copy the energy group exclusions */
2507 fr->egp_flags = ir->opts.egp_flags;
2509 /* Van der Waals stuff */
2510 fr->rvdw = cutoff_inf(ir->rvdw);
2511 fr->rvdw_switch = ir->rvdw_switch;
2512 if ((fr->vdwtype != evdwCUT) && (fr->vdwtype != evdwUSER) && !fr->bBHAM)
2514 if (fr->rvdw_switch >= fr->rvdw)
2516 gmx_fatal(FARGS, "rvdw_switch (%f) must be < rvdw (%f)",
2517 fr->rvdw_switch, fr->rvdw);
2521 fprintf(fp, "Using %s Lennard-Jones, switch between %g and %g nm\n",
2522 (fr->eeltype == eelSWITCH) ? "switched" : "shifted",
2523 fr->rvdw_switch, fr->rvdw);
2527 if (fr->bBHAM && (fr->vdwtype == evdwSHIFT || fr->vdwtype == evdwSWITCH))
2529 gmx_fatal(FARGS, "Switch/shift interaction not supported with Buckingham");
2534 fprintf(fp, "Cut-off's: NS: %g Coulomb: %g %s: %g\n",
2535 fr->rlist, fr->rcoulomb, fr->bBHAM ? "BHAM" : "LJ", fr->rvdw);
2538 fr->eDispCorr = ir->eDispCorr;
2539 if (ir->eDispCorr != edispcNO)
2541 set_avcsixtwelve(fp, fr, mtop);
2546 set_bham_b_max(fp, fr, mtop);
2549 fr->gb_epsilon_solvent = ir->gb_epsilon_solvent;
2551 /* Copy the GBSA data (radius, volume and surftens for each
2552 * atomtype) from the topology atomtype section to forcerec.
2554 snew(fr->atype_radius, fr->ntype);
2555 snew(fr->atype_vol, fr->ntype);
2556 snew(fr->atype_surftens, fr->ntype);
2557 snew(fr->atype_gb_radius, fr->ntype);
2558 snew(fr->atype_S_hct, fr->ntype);
2560 if (mtop->atomtypes.nr > 0)
2562 for (i = 0; i < fr->ntype; i++)
2564 fr->atype_radius[i] = mtop->atomtypes.radius[i];
2566 for (i = 0; i < fr->ntype; i++)
2568 fr->atype_vol[i] = mtop->atomtypes.vol[i];
2570 for (i = 0; i < fr->ntype; i++)
2572 fr->atype_surftens[i] = mtop->atomtypes.surftens[i];
2574 for (i = 0; i < fr->ntype; i++)
2576 fr->atype_gb_radius[i] = mtop->atomtypes.gb_radius[i];
2578 for (i = 0; i < fr->ntype; i++)
2580 fr->atype_S_hct[i] = mtop->atomtypes.S_hct[i];
2584 /* Generate the GB table if needed */
2588 fr->gbtabscale = 2000;
2590 fr->gbtabscale = 500;
2594 fr->gbtab = make_gb_table(oenv, fr);
2596 init_gb(&fr->born, cr, fr, ir, mtop, ir->gb_algorithm);
2598 /* Copy local gb data (for dd, this is done in dd_partition_system) */
2599 if (!DOMAINDECOMP(cr))
2601 make_local_gb(cr, fr->born, ir->gb_algorithm);
2605 /* Set the charge scaling */
2606 if (fr->epsilon_r != 0)
2608 fr->epsfac = ONE_4PI_EPS0/fr->epsilon_r;
2612 /* eps = 0 is infinite dieletric: no coulomb interactions */
2616 /* Reaction field constants */
2617 if (EEL_RF(fr->eeltype))
2619 calc_rffac(fp, fr->eeltype, fr->epsilon_r, fr->epsilon_rf,
2620 fr->rcoulomb, fr->temp, fr->zsquare, box,
2621 &fr->kappa, &fr->k_rf, &fr->c_rf);
2624 set_chargesum(fp, fr, mtop);
2626 /* if we are using LR electrostatics, and they are tabulated,
2627 * the tables will contain modified coulomb interactions.
2628 * Since we want to use the non-shifted ones for 1-4
2629 * coulombic interactions, we must have an extra set of tables.
2632 /* Construct tables.
2633 * A little unnecessary to make both vdw and coul tables sometimes,
2634 * but what the heck... */
2636 bTab = fr->bcoultab || fr->bvdwtab || fr->bEwald;
2638 bSep14tab = ((!bTab || fr->eeltype != eelCUT || fr->vdwtype != evdwCUT ||
2639 fr->bBHAM || fr->bEwald) &&
2640 (gmx_mtop_ftype_count(mtop, F_LJ14) > 0 ||
2641 gmx_mtop_ftype_count(mtop, F_LJC14_Q) > 0 ||
2642 gmx_mtop_ftype_count(mtop, F_LJC_PAIRS_NB) > 0));
2644 negp_pp = ir->opts.ngener - ir->nwall;
2648 bNormalnblists = TRUE;
2653 bNormalnblists = (ir->eDispCorr != edispcNO);
2654 for (egi = 0; egi < negp_pp; egi++)
2656 for (egj = egi; egj < negp_pp; egj++)
2658 egp_flags = ir->opts.egp_flags[GID(egi, egj, ir->opts.ngener)];
2659 if (!(egp_flags & EGP_EXCL))
2661 if (egp_flags & EGP_TABLE)
2667 bNormalnblists = TRUE;
2674 fr->nnblists = negptable + 1;
2678 fr->nnblists = negptable;
2680 if (fr->nnblists > 1)
2682 snew(fr->gid2nblists, ir->opts.ngener*ir->opts.ngener);
2691 snew(fr->nblists, fr->nnblists);
2693 /* This code automatically gives table length tabext without cut-off's,
2694 * in that case grompp should already have checked that we do not need
2695 * normal tables and we only generate tables for 1-4 interactions.
2697 rtab = ir->rlistlong + ir->tabext;
2701 /* make tables for ordinary interactions */
2704 make_nbf_tables(fp, oenv, fr, rtab, cr, tabfn, NULL, NULL, &fr->nblists[0]);
2707 make_nbf_tables(fp, oenv, fr, rtab, cr, tabfn, NULL, NULL, &fr->nblists[fr->nnblists/2]);
2711 fr->tab14 = fr->nblists[0].table_elec_vdw;
2721 /* Read the special tables for certain energy group pairs */
2722 nm_ind = mtop->groups.grps[egcENER].nm_ind;
2723 for (egi = 0; egi < negp_pp; egi++)
2725 for (egj = egi; egj < negp_pp; egj++)
2727 egp_flags = ir->opts.egp_flags[GID(egi, egj, ir->opts.ngener)];
2728 if ((egp_flags & EGP_TABLE) && !(egp_flags & EGP_EXCL))
2730 nbl = &(fr->nblists[m]);
2731 if (fr->nnblists > 1)
2733 fr->gid2nblists[GID(egi, egj, ir->opts.ngener)] = m;
2735 /* Read the table file with the two energy groups names appended */
2736 make_nbf_tables(fp, oenv, fr, rtab, cr, tabfn,
2737 *mtop->groups.grpname[nm_ind[egi]],
2738 *mtop->groups.grpname[nm_ind[egj]],
2742 make_nbf_tables(fp, oenv, fr, rtab, cr, tabfn,
2743 *mtop->groups.grpname[nm_ind[egi]],
2744 *mtop->groups.grpname[nm_ind[egj]],
2745 &fr->nblists[fr->nnblists/2+m]);
2749 else if (fr->nnblists > 1)
2751 fr->gid2nblists[GID(egi, egj, ir->opts.ngener)] = 0;
2759 /* generate extra tables with plain Coulomb for 1-4 interactions only */
2760 fr->tab14 = make_tables(fp, oenv, fr, MASTER(cr), tabpfn, rtab,
2761 GMX_MAKETABLES_14ONLY);
2764 /* Read AdResS Thermo Force table if needed */
2765 if (fr->adress_icor == eAdressICThermoForce)
2767 /* old todo replace */
2769 if (ir->adress->n_tf_grps > 0)
2771 make_adress_tf_tables(fp, oenv, fr, ir, tabfn, mtop, box);
2776 /* load the default table */
2777 snew(fr->atf_tabs, 1);
2778 fr->atf_tabs[DEFAULT_TF_TABLE] = make_atf_table(fp, oenv, fr, tabafn, box);
2783 fr->nwall = ir->nwall;
2784 if (ir->nwall && ir->wall_type == ewtTABLE)
2786 make_wall_tables(fp, oenv, ir, tabfn, &mtop->groups, fr);
2791 fcd->bondtab = make_bonded_tables(fp,
2792 F_TABBONDS, F_TABBONDSNC,
2794 fcd->angletab = make_bonded_tables(fp,
2797 fcd->dihtab = make_bonded_tables(fp,
2805 fprintf(debug, "No fcdata or table file name passed, can not read table, can not do bonded interactions\n");
2809 /* QM/MM initialization if requested
2813 fprintf(stderr, "QM/MM calculation requested.\n");
2816 fr->bQMMM = ir->bQMMM;
2817 fr->qr = mk_QMMMrec();
2819 /* Set all the static charge group info */
2820 fr->cginfo_mb = init_cginfo_mb(fp, mtop, fr, bNoSolvOpt,
2821 &fr->bExcl_IntraCGAll_InterCGNone);
2822 if (DOMAINDECOMP(cr))
2828 fr->cginfo = cginfo_expand(mtop->nmolblock, fr->cginfo_mb);
2831 if (!DOMAINDECOMP(cr))
2833 /* When using particle decomposition, the effect of the second argument,
2834 * which sets fr->hcg, is corrected later in do_md and init_em.
2836 forcerec_set_ranges(fr, ncg_mtop(mtop), ncg_mtop(mtop),
2837 mtop->natoms, mtop->natoms, mtop->natoms);
2840 fr->print_force = print_force;
2843 /* coarse load balancing vars */
2848 /* Initialize neighbor search */
2849 init_ns(fp, cr, &fr->ns, fr, mtop);
2851 if (cr->duty & DUTY_PP)
2853 gmx_nonbonded_setup(fr, bGenericKernelOnly);
2857 gmx_setup_adress_kernels(fp,bGenericKernelOnly);
2862 /* Initialize the thread working data for bonded interactions */
2863 init_forcerec_f_threads(fr, mtop->groups.grps[egcENER].nr);
2865 snew(fr->excl_load, fr->nthreads+1);
2867 if (fr->cutoff_scheme == ecutsVERLET)
2869 if (ir->rcoulomb != ir->rvdw)
2871 gmx_fatal(FARGS, "With Verlet lists rcoulomb and rvdw should be identical");
2874 init_nb_verlet(fp, &fr->nbv, ir, fr, cr, nbpu_opt);
2877 /* fr->ic is used both by verlet and group kernels (to some extent) now */
2878 init_interaction_const(fp, &fr->ic, fr, rtab);
2879 if (ir->eDispCorr != edispcNO)
2881 calc_enervirdiff(fp, ir->eDispCorr, fr);
2885 #define pr_real(fp, r) fprintf(fp, "%s: %e\n",#r, r)
2886 #define pr_int(fp, i) fprintf((fp), "%s: %d\n",#i, i)
2887 #define pr_bool(fp, b) fprintf((fp), "%s: %s\n",#b, bool_names[b])
2889 void pr_forcerec(FILE *fp, t_forcerec *fr)
2893 pr_real(fp, fr->rlist);
2894 pr_real(fp, fr->rcoulomb);
2895 pr_real(fp, fr->fudgeQQ);
2896 pr_bool(fp, fr->bGrid);
2897 pr_bool(fp, fr->bTwinRange);
2898 /*pr_int(fp,fr->cg0);
2899 pr_int(fp,fr->hcg);*/
2900 for (i = 0; i < fr->nnblists; i++)
2902 pr_int(fp, fr->nblists[i].table_elec_vdw.n);
2904 pr_real(fp, fr->rcoulomb_switch);
2905 pr_real(fp, fr->rcoulomb);
2910 void forcerec_set_excl_load(t_forcerec *fr,
2911 const gmx_localtop_t *top, const t_commrec *cr)
2914 int t, i, j, ntot, n, ntarget;
2916 if (cr != NULL && PARTDECOMP(cr))
2918 /* No OpenMP with particle decomposition */
2926 ind = top->excls.index;
2930 for (i = 0; i < top->excls.nr; i++)
2932 for (j = ind[i]; j < ind[i+1]; j++)
2941 fr->excl_load[0] = 0;
2944 for (t = 1; t <= fr->nthreads; t++)
2946 ntarget = (ntot*t)/fr->nthreads;
2947 while (i < top->excls.nr && n < ntarget)
2949 for (j = ind[i]; j < ind[i+1]; j++)
2958 fr->excl_load[t] = i;