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46 #include "gromacs/utility/smalloc.h"
49 #include "chargegroup.h"
53 #include "gmx_fatal.h"
65 #include "gromacs/random/random.h"
70 #include "mtop_util.h"
72 #include "gromacs/gmxlib/conformation-utilities.h"
74 #include "gromacs/fileio/confio.h"
75 #include "gromacs/fileio/gmxfio.h"
76 #include "gromacs/fileio/trxio.h"
77 #include "gromacs/timing/wallcycle.h"
78 #include "gromacs/timing/walltime_accounting.h"
80 static void global_max(t_commrec *cr, int *n)
84 snew(sum, cr->nnodes);
86 gmx_sumi(cr->nnodes, sum, cr);
87 for (i = 0; i < cr->nnodes; i++)
95 static void realloc_bins(double **bin, int *nbin, int nbin_new)
99 if (nbin_new != *nbin)
101 srenew(*bin, nbin_new);
102 for (i = *nbin; i < nbin_new; i++)
110 double do_tpi(FILE *fplog, t_commrec *cr,
111 int nfile, const t_filenm fnm[],
112 const output_env_t oenv, gmx_bool bVerbose, gmx_bool gmx_unused bCompact,
113 int gmx_unused nstglobalcomm,
114 gmx_vsite_t gmx_unused *vsite, gmx_constr_t gmx_unused constr,
115 int gmx_unused stepout,
116 t_inputrec *inputrec,
117 gmx_mtop_t *top_global, t_fcdata *fcd,
120 t_nrnb *nrnb, gmx_wallcycle_t wcycle,
121 gmx_edsam_t gmx_unused ed,
123 int gmx_unused repl_ex_nst, int gmx_unused repl_ex_nex, int gmx_unused repl_ex_seed,
124 gmx_membed_t gmx_unused membed,
125 real gmx_unused cpt_period, real gmx_unused max_hours,
126 const char gmx_unused *deviceOptions,
127 int gmx_unused imdport,
128 unsigned long gmx_unused Flags,
129 gmx_walltime_accounting_t walltime_accounting)
131 const char *TPI = "Test Particle Insertion";
133 gmx_groups_t *groups;
134 gmx_enerdata_t *enerd;
136 real lambda, t, temp, beta, drmax, epot;
137 double embU, sum_embU, *sum_UgembU, V, V_all, VembU_all;
140 gmx_bool bDispCorr, bCharge, bRFExcl, bNotLastFrame, bStateChanged, bNS;
141 tensor force_vir, shake_vir, vir, pres;
142 int cg_tp, a_tp0, a_tp1, ngid, gid_tp, nener, e;
144 rvec mu_tot, x_init, dx, x_tp;
146 gmx_int64_t frame_step_prev, frame_step;
147 gmx_int64_t nsteps, stepblocksize = 0, step;
148 gmx_int64_t rnd_count_stride, rnd_count;
153 char *ptr, *dump_pdb, **leg, str[STRLEN], str2[STRLEN];
154 double dbl, dump_ener;
156 int nat_cavity = 0, d;
157 real *mass_cavity = NULL, mass_tot;
159 double invbinw, *bin, refvolshift, logV, bUlogV;
160 real dvdl, prescorr, enercorr, dvdlcorr;
161 gmx_bool bEnergyOutOfBounds;
162 const char *tpid_leg[2] = {"direct", "reweighted"};
164 /* Since there is no upper limit to the insertion energies,
165 * we need to set an upper limit for the distribution output.
167 real bU_bin_limit = 50;
168 real bU_logV_bin_limit = bU_bin_limit + 10;
170 if (inputrec->cutoff_scheme == ecutsVERLET)
172 gmx_fatal(FARGS, "TPI does not work (yet) with the Verlet cut-off scheme");
177 top = gmx_mtop_generate_local_top(top_global, inputrec);
179 groups = &top_global->groups;
181 bCavity = (inputrec->eI == eiTPIC);
184 ptr = getenv("GMX_TPIC_MASSES");
191 /* Read (multiple) masses from env var GMX_TPIC_MASSES,
192 * The center of mass of the last atoms is then used for TPIC.
195 while (sscanf(ptr, "%lf%n", &dbl, &i) > 0)
197 srenew(mass_cavity, nat_cavity+1);
198 mass_cavity[nat_cavity] = dbl;
199 fprintf(fplog, "mass[%d] = %f\n",
200 nat_cavity+1, mass_cavity[nat_cavity]);
206 gmx_fatal(FARGS, "Found %d masses in GMX_TPIC_MASSES", nat_cavity);
212 init_em(fplog,TPI,inputrec,&lambda,nrnb,mu_tot,
213 state->box,fr,mdatoms,top,cr,nfile,fnm,NULL,NULL);*/
214 /* We never need full pbc for TPI */
216 /* Determine the temperature for the Boltzmann weighting */
217 temp = inputrec->opts.ref_t[0];
220 for (i = 1; (i < inputrec->opts.ngtc); i++)
222 if (inputrec->opts.ref_t[i] != temp)
224 fprintf(fplog, "\nWARNING: The temperatures of the different temperature coupling groups are not identical\n\n");
225 fprintf(stderr, "\nWARNING: The temperatures of the different temperature coupling groups are not identical\n\n");
229 "\n The temperature for test particle insertion is %.3f K\n\n",
232 beta = 1.0/(BOLTZ*temp);
234 /* Number of insertions per frame */
235 nsteps = inputrec->nsteps;
237 /* Use the same neighborlist with more insertions points
238 * in a sphere of radius drmax around the initial point
240 /* This should be a proper mdp parameter */
241 drmax = inputrec->rtpi;
243 /* An environment variable can be set to dump all configurations
244 * to pdb with an insertion energy <= this value.
246 dump_pdb = getenv("GMX_TPI_DUMP");
250 sscanf(dump_pdb, "%lf", &dump_ener);
253 atoms2md(top_global, inputrec, 0, NULL, top_global->natoms, mdatoms);
254 update_mdatoms(mdatoms, inputrec->fepvals->init_lambda);
257 init_enerdata(groups->grps[egcENER].nr, inputrec->fepvals->n_lambda, enerd);
258 snew(f, top_global->natoms);
260 /* Print to log file */
261 walltime_accounting_start(walltime_accounting);
262 wallcycle_start(wcycle, ewcRUN);
263 print_start(fplog, cr, walltime_accounting, "Test Particle Insertion");
265 /* The last charge group is the group to be inserted */
266 cg_tp = top->cgs.nr - 1;
267 a_tp0 = top->cgs.index[cg_tp];
268 a_tp1 = top->cgs.index[cg_tp+1];
271 fprintf(debug, "TPI cg %d, atoms %d-%d\n", cg_tp, a_tp0, a_tp1);
273 if (a_tp1 - a_tp0 > 1 &&
274 (inputrec->rlist < inputrec->rcoulomb ||
275 inputrec->rlist < inputrec->rvdw))
277 gmx_fatal(FARGS, "Can not do TPI for multi-atom molecule with a twin-range cut-off");
279 snew(x_mol, a_tp1-a_tp0);
281 bDispCorr = (inputrec->eDispCorr != edispcNO);
283 for (i = a_tp0; i < a_tp1; i++)
285 /* Copy the coordinates of the molecule to be insterted */
286 copy_rvec(state->x[i], x_mol[i-a_tp0]);
287 /* Check if we need to print electrostatic energies */
288 bCharge |= (mdatoms->chargeA[i] != 0 ||
289 (mdatoms->chargeB && mdatoms->chargeB[i] != 0));
291 bRFExcl = (bCharge && EEL_RF(fr->eeltype) && fr->eeltype != eelRF_NEC);
293 calc_cgcm(fplog, cg_tp, cg_tp+1, &(top->cgs), state->x, fr->cg_cm);
296 if (norm(fr->cg_cm[cg_tp]) > 0.5*inputrec->rlist && fplog)
298 fprintf(fplog, "WARNING: Your TPI molecule is not centered at 0,0,0\n");
299 fprintf(stderr, "WARNING: Your TPI molecule is not centered at 0,0,0\n");
304 /* Center the molecule to be inserted at zero */
305 for (i = 0; i < a_tp1-a_tp0; i++)
307 rvec_dec(x_mol[i], fr->cg_cm[cg_tp]);
313 fprintf(fplog, "\nWill insert %d atoms %s partial charges\n",
314 a_tp1-a_tp0, bCharge ? "with" : "without");
316 fprintf(fplog, "\nWill insert %d times in each frame of %s\n",
317 (int)nsteps, opt2fn("-rerun", nfile, fnm));
322 if (inputrec->nstlist > 1)
324 if (drmax == 0 && a_tp1-a_tp0 == 1)
326 gmx_fatal(FARGS, "Re-using the neighborlist %d times for insertions of a single atom in a sphere of radius %f does not make sense", inputrec->nstlist, drmax);
330 fprintf(fplog, "Will use the same neighborlist for %d insertions in a sphere of radius %f\n", inputrec->nstlist, drmax);
338 fprintf(fplog, "Will insert randomly in a sphere of radius %f around the center of the cavity\n", drmax);
342 ngid = groups->grps[egcENER].nr;
343 gid_tp = GET_CGINFO_GID(fr->cginfo[cg_tp]);
356 if (EEL_FULL(fr->eeltype))
361 snew(sum_UgembU, nener);
363 /* Copy the random seed set by the user */
364 seed = inputrec->ld_seed;
365 /* We use the frame step number as one random counter.
366 * The second counter use the insertion (step) count. But we
367 * need multiple random numbers per insertion. This number is
368 * not fixed, since we generate random locations in a sphere
369 * by putting locations in a cube and some of these fail.
370 * A count of 20 is already extremely unlikely, so 10000 is
371 * a safe margin for random numbers per insertion.
373 rnd_count_stride = 10000;
377 fp_tpi = xvgropen(opt2fn("-tpi", nfile, fnm),
378 "TPI energies", "Time (ps)",
379 "(kJ mol\\S-1\\N) / (nm\\S3\\N)", oenv);
380 xvgr_subtitle(fp_tpi, "f. are averages over one frame", oenv);
383 sprintf(str, "-kT log(<Ve\\S-\\betaU\\N>/<V>)");
384 leg[e++] = strdup(str);
385 sprintf(str, "f. -kT log<e\\S-\\betaU\\N>");
386 leg[e++] = strdup(str);
387 sprintf(str, "f. <e\\S-\\betaU\\N>");
388 leg[e++] = strdup(str);
389 sprintf(str, "f. V");
390 leg[e++] = strdup(str);
391 sprintf(str, "f. <Ue\\S-\\betaU\\N>");
392 leg[e++] = strdup(str);
393 for (i = 0; i < ngid; i++)
395 sprintf(str, "f. <U\\sVdW %s\\Ne\\S-\\betaU\\N>",
396 *(groups->grpname[groups->grps[egcENER].nm_ind[i]]));
397 leg[e++] = strdup(str);
401 sprintf(str, "f. <U\\sdisp c\\Ne\\S-\\betaU\\N>");
402 leg[e++] = strdup(str);
406 for (i = 0; i < ngid; i++)
408 sprintf(str, "f. <U\\sCoul %s\\Ne\\S-\\betaU\\N>",
409 *(groups->grpname[groups->grps[egcENER].nm_ind[i]]));
410 leg[e++] = strdup(str);
414 sprintf(str, "f. <U\\sRF excl\\Ne\\S-\\betaU\\N>");
415 leg[e++] = strdup(str);
417 if (EEL_FULL(fr->eeltype))
419 sprintf(str, "f. <U\\sCoul recip\\Ne\\S-\\betaU\\N>");
420 leg[e++] = strdup(str);
423 xvgr_legend(fp_tpi, 4+nener, (const char**)leg, oenv);
424 for (i = 0; i < 4+nener; i++)
438 /* Avoid frame step numbers <= -1 */
439 frame_step_prev = -1;
441 bNotLastFrame = read_first_frame(oenv, &status, opt2fn("-rerun", nfile, fnm),
442 &rerun_fr, TRX_NEED_X);
445 if (rerun_fr.natoms - (bCavity ? nat_cavity : 0) !=
446 mdatoms->nr - (a_tp1 - a_tp0))
448 gmx_fatal(FARGS, "Number of atoms in trajectory (%d)%s "
449 "is not equal the number in the run input file (%d) "
450 "minus the number of atoms to insert (%d)\n",
451 rerun_fr.natoms, bCavity ? " minus one" : "",
452 mdatoms->nr, a_tp1-a_tp0);
455 refvolshift = log(det(rerun_fr.box));
457 switch (inputrec->eI)
460 stepblocksize = inputrec->nstlist;
466 gmx_fatal(FARGS, "Unknown integrator %s", ei_names[inputrec->eI]);
470 /* Make sure we don't detect SIMD overflow generated before this point */
471 gmx_simd_check_and_reset_overflow();
474 while (bNotLastFrame)
476 frame_step = rerun_fr.step;
477 if (frame_step <= frame_step_prev)
479 /* We don't have step number in the trajectory file,
480 * or we have constant or decreasing step numbers.
481 * Ensure we have increasing step numbers, since we use
482 * the step numbers as a counter for random numbers.
484 frame_step = frame_step_prev + 1;
486 frame_step_prev = frame_step;
488 lambda = rerun_fr.lambda;
492 for (e = 0; e < nener; e++)
497 /* Copy the coordinates from the input trajectory */
498 for (i = 0; i < rerun_fr.natoms; i++)
500 copy_rvec(rerun_fr.x[i], state->x[i]);
502 copy_mat(rerun_fr.box, state->box);
507 bStateChanged = TRUE;
510 step = cr->nodeid*stepblocksize;
511 while (step < nsteps)
513 /* Initialize the second counter for random numbers using
514 * the insertion step index. This ensures that we get
515 * the same random numbers independently of how many
516 * MPI ranks we use. Also for the same seed, we get
517 * the same initial random sequence for different nsteps.
519 rnd_count = step*rnd_count_stride;
523 /* Random insertion in the whole volume */
524 bNS = (step % inputrec->nstlist == 0);
527 /* Generate a random position in the box */
528 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd);
529 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd+2);
530 for (d = 0; d < DIM; d++)
532 x_init[d] = rnd[d]*state->box[d][d];
535 if (inputrec->nstlist == 1)
537 copy_rvec(x_init, x_tp);
541 /* Generate coordinates within |dx|=drmax of x_init */
544 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd);
545 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd+2);
546 for (d = 0; d < DIM; d++)
548 dx[d] = (2*rnd[d] - 1)*drmax;
551 while (norm2(dx) > drmax*drmax);
552 rvec_add(x_init, dx, x_tp);
557 /* Random insertion around a cavity location
558 * given by the last coordinate of the trajectory.
564 /* Copy the location of the cavity */
565 copy_rvec(rerun_fr.x[rerun_fr.natoms-1], x_init);
569 /* Determine the center of mass of the last molecule */
572 for (i = 0; i < nat_cavity; i++)
574 for (d = 0; d < DIM; d++)
577 mass_cavity[i]*rerun_fr.x[rerun_fr.natoms-nat_cavity+i][d];
579 mass_tot += mass_cavity[i];
581 for (d = 0; d < DIM; d++)
583 x_init[d] /= mass_tot;
587 /* Generate coordinates within |dx|=drmax of x_init */
590 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd);
591 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd+2);
592 for (d = 0; d < DIM; d++)
594 dx[d] = (2*rnd[d] - 1)*drmax;
597 while (norm2(dx) > drmax*drmax);
598 rvec_add(x_init, dx, x_tp);
601 if (a_tp1 - a_tp0 == 1)
603 /* Insert a single atom, just copy the insertion location */
604 copy_rvec(x_tp, state->x[a_tp0]);
608 /* Copy the coordinates from the top file */
609 for (i = a_tp0; i < a_tp1; i++)
611 copy_rvec(x_mol[i-a_tp0], state->x[i]);
613 /* Rotate the molecule randomly */
614 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd);
615 gmx_rng_cycle_2uniform(frame_step, rnd_count++, seed, RND_SEED_TPI, rnd+2);
616 rotate_conf(a_tp1-a_tp0, state->x+a_tp0, NULL,
620 /* Shift to the insertion location */
621 for (i = a_tp0; i < a_tp1; i++)
623 rvec_inc(state->x[i], x_tp);
627 /* Clear some matrix variables */
628 clear_mat(force_vir);
629 clear_mat(shake_vir);
633 /* Set the charge group center of mass of the test particle */
634 copy_rvec(x_init, fr->cg_cm[top->cgs.nr-1]);
636 /* Calc energy (no forces) on new positions.
637 * Since we only need the intermolecular energy
638 * and the RF exclusion terms of the inserted molecule occur
639 * within a single charge group we can pass NULL for the graph.
640 * This also avoids shifts that would move charge groups
643 * Some checks above ensure than we can not have
644 * twin-range interactions together with nstlist > 1,
645 * therefore we do not need to remember the LR energies.
647 /* Make do_force do a single node force calculation */
649 do_force(fplog, cr, inputrec,
650 step, nrnb, wcycle, top, &top_global->groups,
651 state->box, state->x, &state->hist,
652 f, force_vir, mdatoms, enerd, fcd,
654 NULL, fr, NULL, mu_tot, t, NULL, NULL, FALSE,
655 GMX_FORCE_NONBONDED | GMX_FORCE_ENERGY |
656 (bNS ? GMX_FORCE_DYNAMICBOX | GMX_FORCE_NS | GMX_FORCE_DO_LR : 0) |
657 (bStateChanged ? GMX_FORCE_STATECHANGED : 0));
659 bStateChanged = FALSE;
662 /* Calculate long range corrections to pressure and energy */
663 calc_dispcorr(fplog, inputrec, fr, step, top_global->natoms, state->box,
664 lambda, pres, vir, &prescorr, &enercorr, &dvdlcorr);
665 /* figure out how to rearrange the next 4 lines MRS 8/4/2009 */
666 enerd->term[F_DISPCORR] = enercorr;
667 enerd->term[F_EPOT] += enercorr;
668 enerd->term[F_PRES] += prescorr;
669 enerd->term[F_DVDL_VDW] += dvdlcorr;
671 epot = enerd->term[F_EPOT];
672 bEnergyOutOfBounds = FALSE;
673 #ifdef GMX_SIMD_X86_SSE2_OR_HIGHER
674 /* With SSE the energy can overflow, check for this */
675 if (gmx_mm_check_and_reset_overflow())
679 fprintf(debug, "Found an SSE overflow, assuming the energy is out of bounds\n");
681 bEnergyOutOfBounds = TRUE;
684 /* If the compiler doesn't optimize this check away
685 * we catch the NAN energies.
686 * The epot>GMX_REAL_MAX check catches inf values,
687 * which should nicely result in embU=0 through the exp below,
688 * but it does not hurt to check anyhow.
690 /* Non-bonded Interaction usually diverge at r=0.
691 * With tabulated interaction functions the first few entries
692 * should be capped in a consistent fashion between
693 * repulsion, dispersion and Coulomb to avoid accidental
694 * negative values in the total energy.
695 * The table generation code in tables.c does this.
696 * With user tbales the user should take care of this.
698 if (epot != epot || epot > GMX_REAL_MAX)
700 bEnergyOutOfBounds = TRUE;
702 if (bEnergyOutOfBounds)
706 fprintf(debug, "\n time %.3f, step %d: non-finite energy %f, using exp(-bU)=0\n", t, (int)step, epot);
712 embU = exp(-beta*epot);
714 /* Determine the weighted energy contributions of each energy group */
716 sum_UgembU[e++] += epot*embU;
719 for (i = 0; i < ngid; i++)
722 (enerd->grpp.ener[egBHAMSR][GID(i, gid_tp, ngid)] +
723 enerd->grpp.ener[egBHAMLR][GID(i, gid_tp, ngid)])*embU;
728 for (i = 0; i < ngid; i++)
731 (enerd->grpp.ener[egLJSR][GID(i, gid_tp, ngid)] +
732 enerd->grpp.ener[egLJLR][GID(i, gid_tp, ngid)])*embU;
737 sum_UgembU[e++] += enerd->term[F_DISPCORR]*embU;
741 for (i = 0; i < ngid; i++)
744 (enerd->grpp.ener[egCOULSR][GID(i, gid_tp, ngid)] +
745 enerd->grpp.ener[egCOULLR][GID(i, gid_tp, ngid)])*embU;
749 sum_UgembU[e++] += enerd->term[F_RF_EXCL]*embU;
751 if (EEL_FULL(fr->eeltype))
753 sum_UgembU[e++] += enerd->term[F_COUL_RECIP]*embU;
758 if (embU == 0 || beta*epot > bU_bin_limit)
764 i = (int)((bU_logV_bin_limit
765 - (beta*epot - logV + refvolshift))*invbinw
773 realloc_bins(&bin, &nbin, i+10);
780 fprintf(debug, "TPI %7d %12.5e %12.5f %12.5f %12.5f\n",
781 (int)step, epot, x_tp[XX], x_tp[YY], x_tp[ZZ]);
784 if (dump_pdb && epot <= dump_ener)
786 sprintf(str, "t%g_step%d.pdb", t, (int)step);
787 sprintf(str2, "t: %f step %d ener: %f", t, (int)step, epot);
788 write_sto_conf_mtop(str, str2, top_global, state->x, state->v,
789 inputrec->ePBC, state->box);
793 if ((step/stepblocksize) % cr->nnodes != cr->nodeid)
795 /* Skip all steps assigned to the other MPI ranks */
796 step += (cr->nnodes - 1)*stepblocksize;
802 /* When running in parallel sum the energies over the processes */
803 gmx_sumd(1, &sum_embU, cr);
804 gmx_sumd(nener, sum_UgembU, cr);
809 VembU_all += V*sum_embU/nsteps;
813 if (bVerbose || frame%10 == 0 || frame < 10)
815 fprintf(stderr, "mu %10.3e <mu> %10.3e\n",
816 -log(sum_embU/nsteps)/beta, -log(VembU_all/V_all)/beta);
819 fprintf(fp_tpi, "%10.3f %12.5e %12.5e %12.5e %12.5e",
821 VembU_all == 0 ? 20/beta : -log(VembU_all/V_all)/beta,
822 sum_embU == 0 ? 20/beta : -log(sum_embU/nsteps)/beta,
824 for (e = 0; e < nener; e++)
826 fprintf(fp_tpi, " %12.5e", sum_UgembU[e]/nsteps);
828 fprintf(fp_tpi, "\n");
832 bNotLastFrame = read_next_frame(oenv, status, &rerun_fr);
833 } /* End of the loop */
834 walltime_accounting_end(walltime_accounting);
840 gmx_fio_fclose(fp_tpi);
845 fprintf(fplog, "\n");
846 fprintf(fplog, " <V> = %12.5e nm^3\n", V_all/frame);
847 fprintf(fplog, " <mu> = %12.5e kJ/mol\n", -log(VembU_all/V_all)/beta);
850 /* Write the Boltzmann factor histogram */
853 /* When running in parallel sum the bins over the processes */
856 realloc_bins(&bin, &nbin, i);
857 gmx_sumd(nbin, bin, cr);
861 fp_tpi = xvgropen(opt2fn("-tpid", nfile, fnm),
862 "TPI energy distribution",
863 "\\betaU - log(V/<V>)", "count", oenv);
864 sprintf(str, "number \\betaU > %g: %9.3e", bU_bin_limit, bin[0]);
865 xvgr_subtitle(fp_tpi, str, oenv);
866 xvgr_legend(fp_tpi, 2, (const char **)tpid_leg, oenv);
867 for (i = nbin-1; i > 0; i--)
869 bUlogV = -i/invbinw + bU_logV_bin_limit - refvolshift + log(V_all/frame);
870 fprintf(fp_tpi, "%6.2f %10d %12.5e\n",
873 bin[i]*exp(-bUlogV)*V_all/VembU_all);
875 gmx_fio_fclose(fp_tpi);
881 walltime_accounting_set_nsteps_done(walltime_accounting, frame*inputrec->nsteps);