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46 #include "gromacs/utility/smalloc.h"
50 #include "nonbonded.h"
64 #include "gmx_omp_nthreads.h"
66 #include "gromacs/timing/wallcycle.h"
67 #include "gromacs/utility/fatalerror.h"
78 gmx_bool bDoLongRangeNS)
84 if (!fr->ns.nblist_initialized)
86 init_neighbor_list(fp, fr, md->homenr);
94 nsearch = search_neighbours(fp, fr, box, top, groups, cr, nrnb, md,
95 bFillGrid, bDoLongRangeNS);
98 fprintf(debug, "nsearch = %d\n", nsearch);
101 /* Check whether we have to do dynamic load balancing */
102 /*if ((nsb->nstDlb > 0) && (mod(step,nsb->nstDlb) == 0))
103 count_nb(cr,nsb,&(top->blocks[ebCGS]),nns,fr->nlr,
104 &(top->idef),opts->ngener);
106 if (fr->ns.dump_nl > 0)
108 dump_nblist(fp, cr, fr, fr->ns.dump_nl);
112 static void reduce_thread_forces(int n, rvec *f,
113 tensor vir_q, tensor vir_lj,
114 real *Vcorr_q, real *Vcorr_lj,
115 real *dvdl_q, real *dvdl_lj,
116 int nthreads, f_thread_t *f_t)
120 /* This reduction can run over any number of threads */
121 #pragma omp parallel for num_threads(gmx_omp_nthreads_get(emntBonded)) private(t) schedule(static)
122 for (i = 0; i < n; i++)
124 for (t = 1; t < nthreads; t++)
126 rvec_inc(f[i], f_t[t].f[i]);
129 for (t = 1; t < nthreads; t++)
131 *Vcorr_q += f_t[t].Vcorr_q;
132 *Vcorr_lj += f_t[t].Vcorr_lj;
133 *dvdl_q += f_t[t].dvdl[efptCOUL];
134 *dvdl_lj += f_t[t].dvdl[efptVDW];
135 m_add(vir_q, f_t[t].vir_q, vir_q);
136 m_add(vir_lj, f_t[t].vir_lj, vir_lj);
140 void gmx_print_sepdvdl(FILE *fplog, const char *s, real v, real dvdlambda)
142 fprintf(fplog, " %-30s V %12.5e dVdl %12.5e\n", s, v, dvdlambda);
145 void do_force_lowlevel(FILE *fplog, gmx_int64_t step,
146 t_forcerec *fr, t_inputrec *ir,
147 t_idef *idef, t_commrec *cr,
148 t_nrnb *nrnb, gmx_wallcycle_t wcycle,
150 rvec x[], history_t *hist,
153 gmx_enerdata_t *enerd,
170 gmx_bool bDoEpot, bSepDVDL, bSB;
176 double clam_i, vlam_i;
177 real dvdl_dum[efptNR], dvdl_nb[efptNR], lam_i[efptNR];
178 real dvdl_q, dvdl_lj;
181 double t0 = 0.0, t1, t2, t3; /* time measurement for coarse load balancing */
184 #define PRINT_SEPDVDL(s, v, dvdlambda) if (bSepDVDL) { gmx_print_sepdvdl(fplog, s, v, dvdlambda); }
186 set_pbc(&pbc, fr->ePBC, box);
188 /* reset free energy components */
189 for (i = 0; i < efptNR; i++)
196 for (i = 0; (i < DIM); i++)
198 box_size[i] = box[i][i];
201 bSepDVDL = (fr->bSepDVDL && do_per_step(step, ir->nstlog));
204 /* do QMMM first if requested */
207 enerd->term[F_EQM] = calculate_QMMM(cr, x, f, fr);
212 fprintf(fplog, "Step %s: non-bonded V and dVdl for node %d:\n",
213 gmx_step_str(step, buf), cr->nodeid);
216 /* Call the short range functions all in one go. */
219 /*#define TAKETIME ((cr->npmenodes) && (fr->timesteps < 12))*/
220 #define TAKETIME FALSE
223 MPI_Barrier(cr->mpi_comm_mygroup);
230 /* foreign lambda component for walls */
231 real dvdl_walls = do_walls(ir, fr, box, md, x, f, lambda[efptVDW],
232 enerd->grpp.ener[egLJSR], nrnb);
233 PRINT_SEPDVDL("Walls", 0.0, dvdl_walls);
234 enerd->dvdl_lin[efptVDW] += dvdl_walls;
237 /* If doing GB, reset dvda and calculate the Born radii */
238 if (ir->implicit_solvent)
240 wallcycle_sub_start(wcycle, ewcsNONBONDED);
242 for (i = 0; i < born->nr; i++)
249 calc_gb_rad(cr, fr, ir, top, x, &(fr->gblist), born, md, nrnb);
252 wallcycle_sub_stop(wcycle, ewcsNONBONDED);
256 /* We only do non-bonded calculation with group scheme here, the verlet
257 * calls are done from do_force_cutsVERLET(). */
258 if (fr->cutoff_scheme == ecutsGROUP && (flags & GMX_FORCE_NONBONDED))
261 /* Add short-range interactions */
262 donb_flags |= GMX_NONBONDED_DO_SR;
264 /* Currently all group scheme kernels always calculate (shift-)forces */
265 if (flags & GMX_FORCE_FORCES)
267 donb_flags |= GMX_NONBONDED_DO_FORCE;
269 if (flags & GMX_FORCE_VIRIAL)
271 donb_flags |= GMX_NONBONDED_DO_SHIFTFORCE;
273 if (flags & GMX_FORCE_ENERGY)
275 donb_flags |= GMX_NONBONDED_DO_POTENTIAL;
277 if (flags & GMX_FORCE_DO_LR)
279 donb_flags |= GMX_NONBONDED_DO_LR;
282 wallcycle_sub_start(wcycle, ewcsNONBONDED);
283 do_nonbonded(fr, x, f, f_longrange, md, excl,
285 lambda, dvdl_nb, -1, -1, donb_flags);
287 /* If we do foreign lambda and we have soft-core interactions
288 * we have to recalculate the (non-linear) energies contributions.
290 if (fepvals->n_lambda > 0 && (flags & GMX_FORCE_DHDL) && fepvals->sc_alpha != 0)
292 for (i = 0; i < enerd->n_lambda; i++)
294 for (j = 0; j < efptNR; j++)
296 lam_i[j] = (i == 0 ? lambda[j] : fepvals->all_lambda[j][i-1]);
298 reset_foreign_enerdata(enerd);
299 do_nonbonded(fr, x, f, f_longrange, md, excl,
300 &(enerd->foreign_grpp), nrnb,
301 lam_i, dvdl_dum, -1, -1,
302 (donb_flags & ~GMX_NONBONDED_DO_FORCE) | GMX_NONBONDED_DO_FOREIGNLAMBDA);
303 sum_epot(&(enerd->foreign_grpp), enerd->foreign_term);
304 enerd->enerpart_lambda[i] += enerd->foreign_term[F_EPOT];
307 wallcycle_sub_stop(wcycle, ewcsNONBONDED);
311 /* If we are doing GB, calculate bonded forces and apply corrections
312 * to the solvation forces */
313 /* MRS: Eventually, many need to include free energy contribution here! */
314 if (ir->implicit_solvent)
316 wallcycle_sub_start(wcycle, ewcsBONDED);
317 calc_gb_forces(cr, md, born, top, x, f, fr, idef,
318 ir->gb_algorithm, ir->sa_algorithm, nrnb, &pbc, graph, enerd);
319 wallcycle_sub_stop(wcycle, ewcsBONDED);
330 if (fepvals->sc_alpha != 0)
332 enerd->dvdl_nonlin[efptVDW] += dvdl_nb[efptVDW];
336 enerd->dvdl_lin[efptVDW] += dvdl_nb[efptVDW];
339 if (fepvals->sc_alpha != 0)
341 /* even though coulomb part is linear, we already added it, beacuse we
342 need to go through the vdw calculation anyway */
344 enerd->dvdl_nonlin[efptCOUL] += dvdl_nb[efptCOUL];
348 enerd->dvdl_lin[efptCOUL] += dvdl_nb[efptCOUL];
353 real V_short_range = 0;
354 real dvdl_short_range = 0;
356 for (i = 0; i < enerd->grpp.nener; i++)
360 enerd->grpp.ener[egBHAMSR][i] :
361 enerd->grpp.ener[egLJSR][i])
362 + enerd->grpp.ener[egCOULSR][i] + enerd->grpp.ener[egGB][i];
364 dvdl_short_range = dvdl_nb[efptVDW] + dvdl_nb[efptCOUL];
365 PRINT_SEPDVDL("VdW and Coulomb SR particle-p.",
374 pr_rvecs(debug, 0, "fshift after SR", fr->fshift, SHIFTS);
377 /* Shift the coordinates. Must be done before bonded forces and PPPM,
378 * but is also necessary for SHAKE and update, therefore it can NOT
379 * go when no bonded forces have to be evaluated.
382 /* Here sometimes we would not need to shift with NBFonly,
383 * but we do so anyhow for consistency of the returned coordinates.
387 shift_self(graph, box, x);
390 inc_nrnb(nrnb, eNR_SHIFTX, 2*graph->nnodes);
394 inc_nrnb(nrnb, eNR_SHIFTX, graph->nnodes);
397 /* Check whether we need to do bondeds or correct for exclusions */
399 ((flags & GMX_FORCE_BONDED)
400 || EEL_RF(fr->eeltype) || EEL_FULL(fr->eeltype) || EVDW_PME(fr->vdwtype)))
402 /* Since all atoms are in the rectangular or triclinic unit-cell,
403 * only single box vector shifts (2 in x) are required.
405 set_pbc_dd(&pbc, fr->ePBC, cr->dd, TRUE, box);
409 if (flags & GMX_FORCE_BONDED)
411 wallcycle_sub_start(wcycle, ewcsBONDED);
412 calc_bonds(fplog, cr->ms,
413 idef, x, hist, f, fr, &pbc, graph, enerd, nrnb, lambda, md, fcd,
414 DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL, atype, born,
416 fr->bSepDVDL && do_per_step(step, ir->nstlog), step);
418 /* Check if we have to determine energy differences
419 * at foreign lambda's.
421 if (fepvals->n_lambda > 0 && (flags & GMX_FORCE_DHDL) &&
422 idef->ilsort != ilsortNO_FE)
424 if (idef->ilsort != ilsortFE_SORTED)
426 gmx_incons("The bonded interactions are not sorted for free energy");
428 for (i = 0; i < enerd->n_lambda; i++)
430 reset_foreign_enerdata(enerd);
431 for (j = 0; j < efptNR; j++)
433 lam_i[j] = (i == 0 ? lambda[j] : fepvals->all_lambda[j][i-1]);
435 calc_bonds_lambda(fplog, idef, x, fr, &pbc, graph, &(enerd->foreign_grpp), enerd->foreign_term, nrnb, lam_i, md,
436 fcd, DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL);
437 sum_epot(&(enerd->foreign_grpp), enerd->foreign_term);
438 enerd->enerpart_lambda[i] += enerd->foreign_term[F_EPOT];
443 wallcycle_sub_stop(wcycle, ewcsBONDED);
449 if (EEL_FULL(fr->eeltype) || EVDW_PME(fr->vdwtype))
451 real Vlr = 0, Vcorr = 0;
452 real dvdl_long_range = 0;
455 bSB = (ir->nwall == 2);
459 svmul(ir->wall_ewald_zfac, boxs[ZZ], boxs[ZZ]);
460 box_size[ZZ] *= ir->wall_ewald_zfac;
464 /* Do long-range electrostatics and/or LJ-PME, including related short-range
468 clear_mat(fr->vir_el_recip);
469 clear_mat(fr->vir_lj_recip);
471 if (EEL_FULL(fr->eeltype) || EVDW_PME(fr->vdwtype))
473 real Vlr_q = 0, Vlr_lj = 0, Vcorr_q = 0, Vcorr_lj = 0;
474 real dvdl_long_range_q = 0, dvdl_long_range_lj = 0;
477 if (EEL_PME_EWALD(fr->eeltype) || EVDW_PME(fr->vdwtype))
479 real dvdl_long_range_correction_q = 0;
480 real dvdl_long_range_correction_lj = 0;
481 /* With the Verlet scheme exclusion forces are calculated
482 * in the non-bonded kernel.
484 /* The TPI molecule does not have exclusions with the rest
485 * of the system and no intra-molecular PME grid
486 * contributions will be calculated in
487 * gmx_pme_calc_energy.
489 if ((ir->cutoff_scheme == ecutsGROUP && fr->n_tpi == 0) ||
490 ir->ewald_geometry != eewg3D ||
491 ir->epsilon_surface != 0)
495 wallcycle_sub_start(wcycle, ewcsEWALD_CORRECTION);
499 gmx_fatal(FARGS, "TPI with PME currently only works in a 3D geometry with tin-foil boundary conditions");
502 nthreads = gmx_omp_nthreads_get(emntBonded);
503 #pragma omp parallel for num_threads(nthreads) schedule(static)
504 for (t = 0; t < nthreads; t++)
508 tensor *vir_q, *vir_lj;
509 real *Vcorrt_q, *Vcorrt_lj, *dvdlt_q, *dvdlt_lj;
512 fnv = fr->f_novirsum;
513 vir_q = &fr->vir_el_recip;
514 vir_lj = &fr->vir_lj_recip;
516 Vcorrt_lj = &Vcorr_lj;
517 dvdlt_q = &dvdl_long_range_correction_q;
518 dvdlt_lj = &dvdl_long_range_correction_lj;
523 vir_q = &fr->f_t[t].vir_q;
524 vir_lj = &fr->f_t[t].vir_lj;
525 Vcorrt_q = &fr->f_t[t].Vcorr_q;
526 Vcorrt_lj = &fr->f_t[t].Vcorr_lj;
527 dvdlt_q = &fr->f_t[t].dvdl[efptCOUL];
528 dvdlt_lj = &fr->f_t[t].dvdl[efptVDW];
529 for (i = 0; i < fr->natoms_force; i++)
539 ewald_LRcorrection(fr->excl_load[t], fr->excl_load[t+1],
542 md->nChargePerturbed ? md->chargeB : NULL,
544 md->nTypePerturbed ? md->sqrt_c6B : NULL,
546 md->nTypePerturbed ? md->sigmaB : NULL,
548 md->nTypePerturbed ? md->sigma3B : NULL,
549 ir->cutoff_scheme != ecutsVERLET,
550 excl, x, bSB ? boxs : box, mu_tot,
553 fnv, *vir_q, *vir_lj,
555 lambda[efptCOUL], lambda[efptVDW],
560 reduce_thread_forces(fr->natoms_force, fr->f_novirsum,
561 fr->vir_el_recip, fr->vir_lj_recip,
563 &dvdl_long_range_correction_q,
564 &dvdl_long_range_correction_lj,
567 wallcycle_sub_stop(wcycle, ewcsEWALD_CORRECTION);
570 if (EEL_PME_EWALD(fr->eeltype) && fr->n_tpi == 0)
572 Vcorr_q += ewald_charge_correction(cr, fr, lambda[efptCOUL], box,
573 &dvdl_long_range_correction_q,
577 PRINT_SEPDVDL("Ewald excl./charge/dip. corr.", Vcorr_q, dvdl_long_range_correction_q);
578 PRINT_SEPDVDL("Ewald excl. corr. LJ", Vcorr_lj, dvdl_long_range_correction_lj);
579 enerd->dvdl_lin[efptCOUL] += dvdl_long_range_correction_q;
580 enerd->dvdl_lin[efptVDW] += dvdl_long_range_correction_lj;
583 if ((EEL_PME(fr->eeltype) || EVDW_PME(fr->vdwtype)))
585 if (cr->duty & DUTY_PME)
587 /* Do reciprocal PME for Coulomb and/or LJ. */
588 assert(fr->n_tpi >= 0);
589 if (fr->n_tpi == 0 || (flags & GMX_FORCE_STATECHANGED))
591 pme_flags = GMX_PME_SPREAD | GMX_PME_SOLVE;
592 if (EEL_PME(fr->eeltype))
594 pme_flags |= GMX_PME_DO_COULOMB;
596 if (EVDW_PME(fr->vdwtype))
598 pme_flags |= GMX_PME_DO_LJ;
600 if (flags & GMX_FORCE_FORCES)
602 pme_flags |= GMX_PME_CALC_F;
604 if (flags & GMX_FORCE_VIRIAL)
606 pme_flags |= GMX_PME_CALC_ENER_VIR;
610 /* We don't calculate f, but we do want the potential */
611 pme_flags |= GMX_PME_CALC_POT;
613 wallcycle_start(wcycle, ewcPMEMESH);
614 status = gmx_pme_do(fr->pmedata,
615 0, md->homenr - fr->n_tpi,
617 md->chargeA, md->chargeB,
618 md->sqrt_c6A, md->sqrt_c6B,
619 md->sigmaA, md->sigmaB,
620 bSB ? boxs : box, cr,
621 DOMAINDECOMP(cr) ? dd_pme_maxshift_x(cr->dd) : 0,
622 DOMAINDECOMP(cr) ? dd_pme_maxshift_y(cr->dd) : 0,
624 fr->vir_el_recip, fr->ewaldcoeff_q,
625 fr->vir_lj_recip, fr->ewaldcoeff_lj,
627 lambda[efptCOUL], lambda[efptVDW],
628 &dvdl_long_range_q, &dvdl_long_range_lj, pme_flags);
629 *cycles_pme = wallcycle_stop(wcycle, ewcPMEMESH);
632 gmx_fatal(FARGS, "Error %d in reciprocal PME routine", status);
634 /* We should try to do as little computation after
635 * this as possible, because parallel PME synchronizes
636 * the nodes, so we want all load imbalance of the
637 * rest of the force calculation to be before the PME
638 * call. DD load balancing is done on the whole time
639 * of the force call (without PME).
644 if (EVDW_PME(ir->vdwtype))
647 gmx_fatal(FARGS, "Test particle insertion not implemented with LJ-PME");
649 /* Determine the PME grid energy of the test molecule
650 * with the PME grid potential of the other charges.
652 gmx_pme_calc_energy(fr->pmedata, fr->n_tpi,
653 x + md->homenr - fr->n_tpi,
654 md->chargeA + md->homenr - fr->n_tpi,
657 PRINT_SEPDVDL("PME mesh", Vlr_q + Vlr_lj, dvdl_long_range_q+dvdl_long_range_lj);
661 if (!EEL_PME(fr->eeltype) && EEL_PME_EWALD(fr->eeltype))
663 Vlr_q = do_ewald(ir, x, fr->f_novirsum,
664 md->chargeA, md->chargeB,
665 box_size, cr, md->homenr,
666 fr->vir_el_recip, fr->ewaldcoeff_q,
667 lambda[efptCOUL], &dvdl_long_range_q, fr->ewald_table);
668 PRINT_SEPDVDL("Ewald long-range", Vlr_q, dvdl_long_range_q);
671 /* Note that with separate PME nodes we get the real energies later */
672 enerd->dvdl_lin[efptCOUL] += dvdl_long_range_q;
673 enerd->dvdl_lin[efptVDW] += dvdl_long_range_lj;
674 enerd->term[F_COUL_RECIP] = Vlr_q + Vcorr_q;
675 enerd->term[F_LJ_RECIP] = Vlr_lj + Vcorr_lj;
678 fprintf(debug, "Vlr_q = %g, Vcorr_q = %g, Vlr_corr_q = %g\n",
679 Vlr_q, Vcorr_q, enerd->term[F_COUL_RECIP]);
680 pr_rvecs(debug, 0, "vir_el_recip after corr", fr->vir_el_recip, DIM);
681 pr_rvecs(debug, 0, "fshift after LR Corrections", fr->fshift, SHIFTS);
682 fprintf(debug, "Vlr_lj: %g, Vcorr_lj = %g, Vlr_corr_lj = %g\n",
683 Vlr_lj, Vcorr_lj, enerd->term[F_LJ_RECIP]);
684 pr_rvecs(debug, 0, "vir_lj_recip after corr", fr->vir_lj_recip, DIM);
689 /* Is there a reaction-field exclusion correction needed? */
690 if (EEL_RF(fr->eeltype) && eelRF_NEC != fr->eeltype)
692 /* With the Verlet scheme, exclusion forces are calculated
693 * in the non-bonded kernel.
695 if (ir->cutoff_scheme != ecutsVERLET)
697 real dvdl_rf_excl = 0;
698 enerd->term[F_RF_EXCL] =
699 RF_excl_correction(fr, graph, md, excl, x, f,
700 fr->fshift, &pbc, lambda[efptCOUL], &dvdl_rf_excl);
702 enerd->dvdl_lin[efptCOUL] += dvdl_rf_excl;
703 PRINT_SEPDVDL("RF exclusion correction",
704 enerd->term[F_RF_EXCL], dvdl_rf_excl);
713 print_nrnb(debug, nrnb);
721 MPI_Barrier(cr->mpi_comm_mygroup);
724 if (fr->timesteps == 11)
726 fprintf(stderr, "* PP load balancing info: node %d, step %s, rel wait time=%3.0f%% , load string value: %7.2f\n",
727 cr->nodeid, gmx_step_str(fr->timesteps, buf),
728 100*fr->t_wait/(fr->t_wait+fr->t_fnbf),
729 (fr->t_fnbf+fr->t_wait)/fr->t_fnbf);
737 pr_rvecs(debug, 0, "fshift after bondeds", fr->fshift, SHIFTS);
742 void init_enerdata(int ngener, int n_lambda, gmx_enerdata_t *enerd)
746 for (i = 0; i < F_NRE; i++)
749 enerd->foreign_term[i] = 0;
753 for (i = 0; i < efptNR; i++)
755 enerd->dvdl_lin[i] = 0;
756 enerd->dvdl_nonlin[i] = 0;
762 fprintf(debug, "Creating %d sized group matrix for energies\n", n2);
764 enerd->grpp.nener = n2;
765 enerd->foreign_grpp.nener = n2;
766 for (i = 0; (i < egNR); i++)
768 snew(enerd->grpp.ener[i], n2);
769 snew(enerd->foreign_grpp.ener[i], n2);
774 enerd->n_lambda = 1 + n_lambda;
775 snew(enerd->enerpart_lambda, enerd->n_lambda);
783 void destroy_enerdata(gmx_enerdata_t *enerd)
787 for (i = 0; (i < egNR); i++)
789 sfree(enerd->grpp.ener[i]);
792 for (i = 0; (i < egNR); i++)
794 sfree(enerd->foreign_grpp.ener[i]);
799 sfree(enerd->enerpart_lambda);
803 static real sum_v(int n, real v[])
809 for (i = 0; (i < n); i++)
817 void sum_epot(gmx_grppairener_t *grpp, real *epot)
821 /* Accumulate energies */
822 epot[F_COUL_SR] = sum_v(grpp->nener, grpp->ener[egCOULSR]);
823 epot[F_LJ] = sum_v(grpp->nener, grpp->ener[egLJSR]);
824 epot[F_LJ14] = sum_v(grpp->nener, grpp->ener[egLJ14]);
825 epot[F_COUL14] = sum_v(grpp->nener, grpp->ener[egCOUL14]);
826 epot[F_COUL_LR] = sum_v(grpp->nener, grpp->ener[egCOULLR]);
827 epot[F_LJ_LR] = sum_v(grpp->nener, grpp->ener[egLJLR]);
828 /* We have already added 1-2,1-3, and 1-4 terms to F_GBPOL */
829 epot[F_GBPOL] += sum_v(grpp->nener, grpp->ener[egGB]);
831 /* lattice part of LR doesnt belong to any group
832 * and has been added earlier
834 epot[F_BHAM] = sum_v(grpp->nener, grpp->ener[egBHAMSR]);
835 epot[F_BHAM_LR] = sum_v(grpp->nener, grpp->ener[egBHAMLR]);
838 for (i = 0; (i < F_EPOT); i++)
840 if (i != F_DISRESVIOL && i != F_ORIRESDEV)
842 epot[F_EPOT] += epot[i];
847 void sum_dhdl(gmx_enerdata_t *enerd, real *lambda, t_lambda *fepvals)
852 enerd->dvdl_lin[efptVDW] += enerd->term[F_DVDL_VDW]; /* include dispersion correction */
853 enerd->term[F_DVDL] = 0.0;
854 for (i = 0; i < efptNR; i++)
856 if (fepvals->separate_dvdl[i])
858 /* could this be done more readably/compactly? */
871 index = F_DVDL_BONDED;
873 case (efptRESTRAINT):
874 index = F_DVDL_RESTRAINT;
880 enerd->term[index] = enerd->dvdl_lin[i] + enerd->dvdl_nonlin[i];
883 fprintf(debug, "dvdl-%s[%2d]: %f: non-linear %f + linear %f\n",
884 efpt_names[i], i, enerd->term[index], enerd->dvdl_nonlin[i], enerd->dvdl_lin[i]);
889 enerd->term[F_DVDL] += enerd->dvdl_lin[i] + enerd->dvdl_nonlin[i];
892 fprintf(debug, "dvd-%sl[%2d]: %f: non-linear %f + linear %f\n",
893 efpt_names[0], i, enerd->term[F_DVDL], enerd->dvdl_nonlin[i], enerd->dvdl_lin[i]);
898 /* Notes on the foreign lambda free energy difference evaluation:
899 * Adding the potential and ekin terms that depend linearly on lambda
900 * as delta lam * dvdl to the energy differences is exact.
901 * For the constraints this is not exact, but we have no other option
902 * without literally changing the lengths and reevaluating the energies at each step.
903 * (try to remedy this post 4.6 - MRS)
904 * For the non-bonded LR term we assume that the soft-core (if present)
905 * no longer affects the energy beyond the short-range cut-off,
906 * which is a very good approximation (except for exotic settings).
907 * (investigate how to overcome this post 4.6 - MRS)
909 if (fepvals->separate_dvdl[efptBONDED])
911 enerd->term[F_DVDL_BONDED] += enerd->term[F_DVDL_CONSTR];
915 enerd->term[F_DVDL] += enerd->term[F_DVDL_CONSTR];
917 enerd->term[F_DVDL_CONSTR] = 0;
919 for (i = 0; i < fepvals->n_lambda; i++)
921 /* note we are iterating over fepvals here!
922 For the current lam, dlam = 0 automatically,
923 so we don't need to add anything to the
924 enerd->enerpart_lambda[0] */
926 /* we don't need to worry about dvdl_lin contributions to dE at
927 current lambda, because the contributions to the current
928 lambda are automatically zeroed */
930 for (j = 0; j < efptNR; j++)
932 /* Note that this loop is over all dhdl components, not just the separated ones */
933 dlam = (fepvals->all_lambda[j][i]-lambda[j]);
934 enerd->enerpart_lambda[i+1] += dlam*enerd->dvdl_lin[j];
937 fprintf(debug, "enerdiff lam %g: (%15s), non-linear %f linear %f*%f\n",
938 fepvals->all_lambda[j][i], efpt_names[j],
939 (enerd->enerpart_lambda[i+1] - enerd->enerpart_lambda[0]),
940 dlam, enerd->dvdl_lin[j]);
947 void reset_foreign_enerdata(gmx_enerdata_t *enerd)
951 /* First reset all foreign energy components. Foreign energies always called on
952 neighbor search steps */
953 for (i = 0; (i < egNR); i++)
955 for (j = 0; (j < enerd->grpp.nener); j++)
957 enerd->foreign_grpp.ener[i][j] = 0.0;
961 /* potential energy components */
962 for (i = 0; (i <= F_EPOT); i++)
964 enerd->foreign_term[i] = 0.0;
968 void reset_enerdata(t_forcerec *fr, gmx_bool bNS,
969 gmx_enerdata_t *enerd,
975 /* First reset all energy components, except for the long range terms
976 * on the master at non neighbor search steps, since the long range
977 * terms have already been summed at the last neighbor search step.
979 bKeepLR = (fr->bTwinRange && !bNS);
980 for (i = 0; (i < egNR); i++)
982 if (!(bKeepLR && bMaster && (i == egCOULLR || i == egLJLR)))
984 for (j = 0; (j < enerd->grpp.nener); j++)
986 enerd->grpp.ener[i][j] = 0.0;
990 for (i = 0; i < efptNR; i++)
992 enerd->dvdl_lin[i] = 0.0;
993 enerd->dvdl_nonlin[i] = 0.0;
996 /* Normal potential energy components */
997 for (i = 0; (i <= F_EPOT); i++)
999 enerd->term[i] = 0.0;
1001 /* Initialize the dVdlambda term with the long range contribution */
1002 /* Initialize the dvdl term with the long range contribution */
1003 enerd->term[F_DVDL] = 0.0;
1004 enerd->term[F_DVDL_COUL] = 0.0;
1005 enerd->term[F_DVDL_VDW] = 0.0;
1006 enerd->term[F_DVDL_BONDED] = 0.0;
1007 enerd->term[F_DVDL_RESTRAINT] = 0.0;
1008 enerd->term[F_DKDL] = 0.0;
1009 if (enerd->n_lambda > 0)
1011 for (i = 0; i < enerd->n_lambda; i++)
1013 enerd->enerpart_lambda[i] = 0.0;
1016 /* reset foreign energy data - separate function since we also call it elsewhere */
1017 reset_foreign_enerdata(enerd);