예제 #1
0
파일: force.c 프로젝트: yhalcyon/Gromacs
void do_force_lowlevel(FILE       *fplog,   gmx_large_int_t step,
                       t_forcerec *fr,      t_inputrec *ir,
                       t_idef     *idef,    t_commrec  *cr,
                       t_nrnb     *nrnb,    gmx_wallcycle_t wcycle,
                       t_mdatoms  *md,
                       t_grpopts  *opts,
                       rvec       x[],      history_t  *hist,
                       rvec       f[],
                       rvec       f_longrange[],
                       gmx_enerdata_t *enerd,
                       t_fcdata   *fcd,
                       gmx_mtop_t     *mtop,
                       gmx_localtop_t *top,
                       gmx_genborn_t *born,
                       t_atomtypes *atype,
                       gmx_bool       bBornRadii,
                       matrix     box,
                       t_lambda   *fepvals,
                       real       *lambda,
                       t_graph    *graph,
                       t_blocka   *excl,
                       rvec       mu_tot[],
                       int        flags,
                       float      *cycles_pme)
{
    int         i, j, status;
    int         donb_flags;
    gmx_bool    bDoEpot, bSepDVDL, bSB;
    int         pme_flags;
    matrix      boxs;
    rvec        box_size;
    real        Vsr, Vlr, Vcorr = 0;
    t_pbc       pbc;
    real        dvdgb;
    char        buf[22];
    double      clam_i, vlam_i;
    real        dvdl_dum[efptNR], dvdl, dvdl_nb[efptNR], lam_i[efptNR];
    real        dvdlsum;

#ifdef GMX_MPI
    double  t0 = 0.0, t1, t2, t3; /* time measurement for coarse load balancing */
#endif

#define PRINT_SEPDVDL(s, v, dvdlambda) if (bSepDVDL) {fprintf(fplog, sepdvdlformat, s, v, dvdlambda); }

    GMX_MPE_LOG(ev_force_start);
    set_pbc(&pbc, fr->ePBC, box);

    /* reset free energy components */
    for (i = 0; i < efptNR; i++)
    {
        dvdl_nb[i]  = 0;
        dvdl_dum[i] = 0;
    }

    /* Reset box */
    for (i = 0; (i < DIM); i++)
    {
        box_size[i] = box[i][i];
    }

    bSepDVDL = (fr->bSepDVDL && do_per_step(step, ir->nstlog));
    debug_gmx();

    /* do QMMM first if requested */
    if (fr->bQMMM)
    {
        enerd->term[F_EQM] = calculate_QMMM(cr, x, f, fr, md);
    }

    if (bSepDVDL)
    {
        fprintf(fplog, "Step %s: non-bonded V and dVdl for node %d:\n",
                gmx_step_str(step, buf), cr->nodeid);
    }

    /* Call the short range functions all in one go. */
    GMX_MPE_LOG(ev_do_fnbf_start);

#ifdef GMX_MPI
    /*#define TAKETIME ((cr->npmenodes) && (fr->timesteps < 12))*/
#define TAKETIME FALSE
    if (TAKETIME)
    {
        MPI_Barrier(cr->mpi_comm_mygroup);
        t0 = MPI_Wtime();
    }
#endif

    if (ir->nwall)
    {
        /* foreign lambda component for walls */
        dvdl = do_walls(ir, fr, box, md, x, f, lambda[efptVDW],
                        enerd->grpp.ener[egLJSR], nrnb);
        PRINT_SEPDVDL("Walls", 0.0, dvdl);
        enerd->dvdl_lin[efptVDW] += dvdl;
    }

    /* If doing GB, reset dvda and calculate the Born radii */
    if (ir->implicit_solvent)
    {
        wallcycle_sub_start(wcycle, ewcsNONBONDED);

        for (i = 0; i < born->nr; i++)
        {
            fr->dvda[i] = 0;
        }

        if (bBornRadii)
        {
            calc_gb_rad(cr, fr, ir, top, atype, x, &(fr->gblist), born, md, nrnb);
        }

        wallcycle_sub_stop(wcycle, ewcsNONBONDED);
    }

    where();
    /* We only do non-bonded calculation with group scheme here, the verlet
     * calls are done from do_force_cutsVERLET(). */
    if (fr->cutoff_scheme == ecutsGROUP && (flags & GMX_FORCE_NONBONDED))
    {
        donb_flags = 0;
        /* Add short-range interactions */
        donb_flags |= GMX_NONBONDED_DO_SR;

        if (flags & GMX_FORCE_FORCES)
        {
            donb_flags |= GMX_NONBONDED_DO_FORCE;
        }
        if (flags & GMX_FORCE_ENERGY)
        {
            donb_flags |= GMX_NONBONDED_DO_POTENTIAL;
        }
        if (flags & GMX_FORCE_DO_LR)
        {
            donb_flags |= GMX_NONBONDED_DO_LR;
        }

        wallcycle_sub_start(wcycle, ewcsNONBONDED);
        do_nonbonded(cr, fr, x, f, f_longrange, md, excl,
                     &enerd->grpp, box_size, nrnb,
                     lambda, dvdl_nb, -1, -1, donb_flags);

        /* If we do foreign lambda and we have soft-core interactions
         * we have to recalculate the (non-linear) energies contributions.
         */
        if (fepvals->n_lambda > 0 && (flags & GMX_FORCE_DHDL) && fepvals->sc_alpha != 0)
        {
            for (i = 0; i < enerd->n_lambda; i++)
            {
                for (j = 0; j < efptNR; j++)
                {
                    lam_i[j] = (i == 0 ? lambda[j] : fepvals->all_lambda[j][i-1]);
                }
                reset_foreign_enerdata(enerd);
                do_nonbonded(cr, fr, x, f, f_longrange, md, excl,
                             &(enerd->foreign_grpp), box_size, nrnb,
                             lam_i, dvdl_dum, -1, -1,
                             (donb_flags & ~GMX_NONBONDED_DO_FORCE) | GMX_NONBONDED_DO_FOREIGNLAMBDA);
                sum_epot(&ir->opts, &(enerd->foreign_grpp), enerd->foreign_term);
                enerd->enerpart_lambda[i] += enerd->foreign_term[F_EPOT];
            }
        }
        wallcycle_sub_stop(wcycle, ewcsNONBONDED);
        where();
    }

    /* If we are doing GB, calculate bonded forces and apply corrections
     * to the solvation forces */
    /* MRS: Eventually, many need to include free energy contribution here! */
    if (ir->implicit_solvent)
    {
        wallcycle_sub_start(wcycle, ewcsBONDED);
        calc_gb_forces(cr, md, born, top, atype, x, f, fr, idef,
                       ir->gb_algorithm, ir->sa_algorithm, nrnb, bBornRadii, &pbc, graph, enerd);
        wallcycle_sub_stop(wcycle, ewcsBONDED);
    }

#ifdef GMX_MPI
    if (TAKETIME)
    {
        t1          = MPI_Wtime();
        fr->t_fnbf += t1-t0;
    }
#endif

    if (fepvals->sc_alpha != 0)
    {
        enerd->dvdl_nonlin[efptVDW] += dvdl_nb[efptVDW];
    }
    else
    {
        enerd->dvdl_lin[efptVDW] += dvdl_nb[efptVDW];
    }

    if (fepvals->sc_alpha != 0)

    /* even though coulomb part is linear, we already added it, beacuse we
       need to go through the vdw calculation anyway */
    {
        enerd->dvdl_nonlin[efptCOUL] += dvdl_nb[efptCOUL];
    }
    else
    {
        enerd->dvdl_lin[efptCOUL] += dvdl_nb[efptCOUL];
    }

    Vsr = 0;
    if (bSepDVDL)
    {
        for (i = 0; i < enerd->grpp.nener; i++)
        {
            Vsr +=
                (fr->bBHAM ?
                 enerd->grpp.ener[egBHAMSR][i] :
                 enerd->grpp.ener[egLJSR][i])
                + enerd->grpp.ener[egCOULSR][i] + enerd->grpp.ener[egGB][i];
        }
        dvdlsum = dvdl_nb[efptVDW] + dvdl_nb[efptCOUL];
        PRINT_SEPDVDL("VdW and Coulomb SR particle-p.", Vsr, dvdlsum);
    }
    debug_gmx();

    GMX_MPE_LOG(ev_do_fnbf_finish);

    if (debug)
    {
        pr_rvecs(debug, 0, "fshift after SR", fr->fshift, SHIFTS);
    }

    /* Shift the coordinates. Must be done before bonded forces and PPPM,
     * but is also necessary for SHAKE and update, therefore it can NOT
     * go when no bonded forces have to be evaluated.
     */

    /* Here sometimes we would not need to shift with NBFonly,
     * but we do so anyhow for consistency of the returned coordinates.
     */
    if (graph)
    {
        shift_self(graph, box, x);
        if (TRICLINIC(box))
        {
            inc_nrnb(nrnb, eNR_SHIFTX, 2*graph->nnodes);
        }
        else
        {
            inc_nrnb(nrnb, eNR_SHIFTX, graph->nnodes);
        }
    }
    /* Check whether we need to do bondeds or correct for exclusions */
    if (fr->bMolPBC &&
        ((flags & GMX_FORCE_BONDED)
         || EEL_RF(fr->eeltype) || EEL_FULL(fr->eeltype)))
    {
        /* Since all atoms are in the rectangular or triclinic unit-cell,
         * only single box vector shifts (2 in x) are required.
         */
        set_pbc_dd(&pbc, fr->ePBC, cr->dd, TRUE, box);
    }
    debug_gmx();

    if (flags & GMX_FORCE_BONDED)
    {
        GMX_MPE_LOG(ev_calc_bonds_start);

        wallcycle_sub_start(wcycle, ewcsBONDED);
        calc_bonds(fplog, cr->ms,
                   idef, x, hist, f, fr, &pbc, graph, enerd, nrnb, lambda, md, fcd,
                   DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL, atype, born,
                   flags,
                   fr->bSepDVDL && do_per_step(step, ir->nstlog), step);

        /* Check if we have to determine energy differences
         * at foreign lambda's.
         */
        if (fepvals->n_lambda > 0 && (flags & GMX_FORCE_DHDL) &&
            idef->ilsort != ilsortNO_FE)
        {
            if (idef->ilsort != ilsortFE_SORTED)
            {
                gmx_incons("The bonded interactions are not sorted for free energy");
            }
            for (i = 0; i < enerd->n_lambda; i++)
            {
                reset_foreign_enerdata(enerd);
                for (j = 0; j < efptNR; j++)
                {
                    lam_i[j] = (i == 0 ? lambda[j] : fepvals->all_lambda[j][i-1]);
                }
                calc_bonds_lambda(fplog, idef, x, fr, &pbc, graph, &(enerd->foreign_grpp), enerd->foreign_term, nrnb, lam_i, md,
                                  fcd, DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL);
                sum_epot(&ir->opts, &(enerd->foreign_grpp), enerd->foreign_term);
                enerd->enerpart_lambda[i] += enerd->foreign_term[F_EPOT];
            }
        }
        debug_gmx();
        GMX_MPE_LOG(ev_calc_bonds_finish);
        wallcycle_sub_stop(wcycle, ewcsBONDED);
    }

    where();

    *cycles_pme = 0;
    if (EEL_FULL(fr->eeltype))
    {
        bSB = (ir->nwall == 2);
        if (bSB)
        {
            copy_mat(box, boxs);
            svmul(ir->wall_ewald_zfac, boxs[ZZ], boxs[ZZ]);
            box_size[ZZ] *= ir->wall_ewald_zfac;
        }

        clear_mat(fr->vir_el_recip);

        if (fr->bEwald)
        {
            Vcorr = 0;
            dvdl  = 0;

            /* With the Verlet scheme exclusion forces are calculated
             * in the non-bonded kernel.
             */
            /* The TPI molecule does not have exclusions with the rest
             * of the system and no intra-molecular PME grid contributions
             * will be calculated in gmx_pme_calc_energy.
             */
            if ((ir->cutoff_scheme == ecutsGROUP && fr->n_tpi == 0) ||
                ir->ewald_geometry != eewg3D ||
                ir->epsilon_surface != 0)
            {
                int nthreads, t;

                wallcycle_sub_start(wcycle, ewcsEWALD_CORRECTION);

                if (fr->n_tpi > 0)
                {
                    gmx_fatal(FARGS, "TPI with PME currently only works in a 3D geometry with tin-foil boundary conditions");
                }

                nthreads = gmx_omp_nthreads_get(emntBonded);
#pragma omp parallel for num_threads(nthreads) schedule(static)
                for (t = 0; t < nthreads; t++)
                {
                    int     s, e, i;
                    rvec   *fnv;
                    tensor *vir;
                    real   *Vcorrt, *dvdlt;
                    if (t == 0)
                    {
                        fnv    = fr->f_novirsum;
                        vir    = &fr->vir_el_recip;
                        Vcorrt = &Vcorr;
                        dvdlt  = &dvdl;
                    }
                    else
                    {
                        fnv    = fr->f_t[t].f;
                        vir    = &fr->f_t[t].vir;
                        Vcorrt = &fr->f_t[t].Vcorr;
                        dvdlt  = &fr->f_t[t].dvdl[efptCOUL];
                        for (i = 0; i < fr->natoms_force; i++)
                        {
                            clear_rvec(fnv[i]);
                        }
                        clear_mat(*vir);
                    }
                    *dvdlt  = 0;
                    *Vcorrt =
                        ewald_LRcorrection(fplog,
                                           fr->excl_load[t], fr->excl_load[t+1],
                                           cr, t, fr,
                                           md->chargeA,
                                           md->nChargePerturbed ? md->chargeB : NULL,
                                           ir->cutoff_scheme != ecutsVERLET,
                                           excl, x, bSB ? boxs : box, mu_tot,
                                           ir->ewald_geometry,
                                           ir->epsilon_surface,
                                           fnv, *vir,
                                           lambda[efptCOUL], dvdlt);
                }
                if (nthreads > 1)
                {
                    reduce_thread_forces(fr->natoms_force, fr->f_novirsum,
                                         fr->vir_el_recip,
                                         &Vcorr, efptCOUL, &dvdl,
                                         nthreads, fr->f_t);
                }

                wallcycle_sub_stop(wcycle, ewcsEWALD_CORRECTION);
            }

            if (fr->n_tpi == 0)
            {
                Vcorr += ewald_charge_correction(cr, fr, lambda[efptCOUL], box,
                                                 &dvdl, fr->vir_el_recip);
            }

            PRINT_SEPDVDL("Ewald excl./charge/dip. corr.", Vcorr, dvdl);
            enerd->dvdl_lin[efptCOUL] += dvdl;
        }

        status = 0;
        Vlr    = 0;
        dvdl   = 0;
        switch (fr->eeltype)
        {
            case eelPME:
            case eelPMESWITCH:
            case eelPMEUSER:
            case eelPMEUSERSWITCH:
            case eelP3M_AD:
                if (cr->duty & DUTY_PME)
                {
                    assert(fr->n_tpi >= 0);
                    if (fr->n_tpi == 0 || (flags & GMX_FORCE_STATECHANGED))
                    {
                        pme_flags = GMX_PME_SPREAD_Q | GMX_PME_SOLVE;
                        if (flags & GMX_FORCE_FORCES)
                        {
                            pme_flags |= GMX_PME_CALC_F;
                        }
                        if (flags & (GMX_FORCE_VIRIAL | GMX_FORCE_ENERGY))
                        {
                            pme_flags |= GMX_PME_CALC_ENER_VIR;
                        }
                        if (fr->n_tpi > 0)
                        {
                            /* We don't calculate f, but we do want the potential */
                            pme_flags |= GMX_PME_CALC_POT;
                        }
                        wallcycle_start(wcycle, ewcPMEMESH);
                        status = gmx_pme_do(fr->pmedata,
                                            md->start, md->homenr - fr->n_tpi,
                                            x, fr->f_novirsum,
                                            md->chargeA, md->chargeB,
                                            bSB ? boxs : box, cr,
                                            DOMAINDECOMP(cr) ? dd_pme_maxshift_x(cr->dd) : 0,
                                            DOMAINDECOMP(cr) ? dd_pme_maxshift_y(cr->dd) : 0,
                                            nrnb, wcycle,
                                            fr->vir_el_recip, fr->ewaldcoeff,
                                            &Vlr, lambda[efptCOUL], &dvdl,
                                            pme_flags);
                        *cycles_pme = wallcycle_stop(wcycle, ewcPMEMESH);

                        /* We should try to do as little computation after
                         * this as possible, because parallel PME synchronizes
                         * the nodes, so we want all load imbalance of the rest
                         * of the force calculation to be before the PME call.
                         * DD load balancing is done on the whole time of
                         * the force call (without PME).
                         */
                    }
                    if (fr->n_tpi > 0)
                    {
                        /* Determine the PME grid energy of the test molecule
                         * with the PME grid potential of the other charges.
                         */
                        gmx_pme_calc_energy(fr->pmedata, fr->n_tpi,
                                            x + md->homenr - fr->n_tpi,
                                            md->chargeA + md->homenr - fr->n_tpi,
                                            &Vlr);
                    }
                    PRINT_SEPDVDL("PME mesh", Vlr, dvdl);
                }
                break;
            case eelEWALD:
                Vlr = do_ewald(fplog, FALSE, ir, x, fr->f_novirsum,
                               md->chargeA, md->chargeB,
                               box_size, cr, md->homenr,
                               fr->vir_el_recip, fr->ewaldcoeff,
                               lambda[efptCOUL], &dvdl, fr->ewald_table);
                PRINT_SEPDVDL("Ewald long-range", Vlr, dvdl);
                break;
            default:
                gmx_fatal(FARGS, "No such electrostatics method implemented %s",
                          eel_names[fr->eeltype]);
        }
        if (status != 0)
        {
            gmx_fatal(FARGS, "Error %d in long range electrostatics routine %s",
                      status, EELTYPE(fr->eeltype));
        }
        /* Note that with separate PME nodes we get the real energies later */
        enerd->dvdl_lin[efptCOUL] += dvdl;
        enerd->term[F_COUL_RECIP]  = Vlr + Vcorr;
        if (debug)
        {
            fprintf(debug, "Vlr = %g, Vcorr = %g, Vlr_corr = %g\n",
                    Vlr, Vcorr, enerd->term[F_COUL_RECIP]);
            pr_rvecs(debug, 0, "vir_el_recip after corr", fr->vir_el_recip, DIM);
            pr_rvecs(debug, 0, "fshift after LR Corrections", fr->fshift, SHIFTS);
        }
    }
    else
    {
        if (EEL_RF(fr->eeltype))
        {
            /* With the Verlet scheme exclusion forces are calculated
             * in the non-bonded kernel.
             */
            if (ir->cutoff_scheme != ecutsVERLET && fr->eeltype != eelRF_NEC)
            {
                dvdl                   = 0;
                enerd->term[F_RF_EXCL] =
                    RF_excl_correction(fplog, fr, graph, md, excl, x, f,
                                       fr->fshift, &pbc, lambda[efptCOUL], &dvdl);
            }

            enerd->dvdl_lin[efptCOUL] += dvdl;
            PRINT_SEPDVDL("RF exclusion correction",
                          enerd->term[F_RF_EXCL], dvdl);
        }
    }
    where();
    debug_gmx();

    if (debug)
    {
        print_nrnb(debug, nrnb);
    }
    debug_gmx();

#ifdef GMX_MPI
    if (TAKETIME)
    {
        t2 = MPI_Wtime();
        MPI_Barrier(cr->mpi_comm_mygroup);
        t3          = MPI_Wtime();
        fr->t_wait += t3-t2;
        if (fr->timesteps == 11)
        {
            fprintf(stderr, "* PP load balancing info: node %d, step %s, rel wait time=%3.0f%% , load string value: %7.2f\n",
                    cr->nodeid, gmx_step_str(fr->timesteps, buf),
                    100*fr->t_wait/(fr->t_wait+fr->t_fnbf),
                    (fr->t_fnbf+fr->t_wait)/fr->t_fnbf);
        }
        fr->timesteps++;
    }
#endif

    if (debug)
    {
        pr_rvecs(debug, 0, "fshift after bondeds", fr->fshift, SHIFTS);
    }

    GMX_MPE_LOG(ev_force_finish);

}
예제 #2
0
void do_force_lowlevel(t_forcerec *fr,      t_inputrec *ir,
                       t_idef     *idef,    t_commrec  *cr,
                       t_nrnb     *nrnb,    gmx_wallcycle_t wcycle,
                       t_mdatoms  *md,
                       rvec       x[],      history_t  *hist,
                       rvec       f[],
                       rvec       f_longrange[],
                       gmx_enerdata_t *enerd,
                       t_fcdata   *fcd,
                       gmx_localtop_t *top,
                       gmx_genborn_t *born,
                       gmx_bool       bBornRadii,
                       matrix     box,
                       t_lambda   *fepvals,
                       real       *lambda,
                       t_graph    *graph,
                       t_blocka   *excl,
                       rvec       mu_tot[],
                       int        flags,
                       float      *cycles_pme)
{
    int         i, j;
    int         donb_flags;
    gmx_bool    bSB;
    int         pme_flags;
    matrix      boxs;
    rvec        box_size;
    t_pbc       pbc;
    real        dvdl_dum[efptNR], dvdl_nb[efptNR];

#ifdef GMX_MPI
    double  t0 = 0.0, t1, t2, t3; /* time measurement for coarse load balancing */
#endif

    set_pbc(&pbc, fr->ePBC, box);

    /* reset free energy components */
    for (i = 0; i < efptNR; i++)
    {
        dvdl_nb[i]  = 0;
        dvdl_dum[i] = 0;
    }

    /* Reset box */
    for (i = 0; (i < DIM); i++)
    {
        box_size[i] = box[i][i];
    }

    debug_gmx();

    /* do QMMM first if requested */
    if (fr->bQMMM)
    {
        enerd->term[F_EQM] = calculate_QMMM(cr, x, f, fr);
    }

    /* Call the short range functions all in one go. */

#ifdef GMX_MPI
    /*#define TAKETIME ((cr->npmenodes) && (fr->timesteps < 12))*/
#define TAKETIME FALSE
    if (TAKETIME)
    {
        MPI_Barrier(cr->mpi_comm_mygroup);
        t0 = MPI_Wtime();
    }
#endif

    if (ir->nwall)
    {
        /* foreign lambda component for walls */
        real dvdl_walls = do_walls(ir, fr, box, md, x, f, lambda[efptVDW],
                                   enerd->grpp.ener[egLJSR], nrnb);
        enerd->dvdl_lin[efptVDW] += dvdl_walls;
    }

    /* If doing GB, reset dvda and calculate the Born radii */
    if (ir->implicit_solvent)
    {
        wallcycle_sub_start(wcycle, ewcsNONBONDED);

        for (i = 0; i < born->nr; i++)
        {
            fr->dvda[i] = 0;
        }

        if (bBornRadii)
        {
            calc_gb_rad(cr, fr, ir, top, x, &(fr->gblist), born, md, nrnb);
        }

        wallcycle_sub_stop(wcycle, ewcsNONBONDED);
    }

    where();
    /* We only do non-bonded calculation with group scheme here, the verlet
     * calls are done from do_force_cutsVERLET(). */
    if (fr->cutoff_scheme == ecutsGROUP && (flags & GMX_FORCE_NONBONDED))
    {
        donb_flags = 0;
        /* Add short-range interactions */
        donb_flags |= GMX_NONBONDED_DO_SR;

        /* Currently all group scheme kernels always calculate (shift-)forces */
        if (flags & GMX_FORCE_FORCES)
        {
            donb_flags |= GMX_NONBONDED_DO_FORCE;
        }
        if (flags & GMX_FORCE_VIRIAL)
        {
            donb_flags |= GMX_NONBONDED_DO_SHIFTFORCE;
        }
        if (flags & GMX_FORCE_ENERGY)
        {
            donb_flags |= GMX_NONBONDED_DO_POTENTIAL;
        }
        if (flags & GMX_FORCE_DO_LR)
        {
            donb_flags |= GMX_NONBONDED_DO_LR;
        }

        wallcycle_sub_start(wcycle, ewcsNONBONDED);
        do_nonbonded(fr, x, f, f_longrange, md, excl,
                     &enerd->grpp, nrnb,
                     lambda, dvdl_nb, -1, -1, donb_flags);

        /* If we do foreign lambda and we have soft-core interactions
         * we have to recalculate the (non-linear) energies contributions.
         */
        if (fepvals->n_lambda > 0 && (flags & GMX_FORCE_DHDL) && fepvals->sc_alpha != 0)
        {
            for (i = 0; i < enerd->n_lambda; i++)
            {
                real lam_i[efptNR];

                for (j = 0; j < efptNR; j++)
                {
                    lam_i[j] = (i == 0 ? lambda[j] : fepvals->all_lambda[j][i-1]);
                }
                reset_foreign_enerdata(enerd);
                do_nonbonded(fr, x, f, f_longrange, md, excl,
                             &(enerd->foreign_grpp), nrnb,
                             lam_i, dvdl_dum, -1, -1,
                             (donb_flags & ~GMX_NONBONDED_DO_FORCE) | GMX_NONBONDED_DO_FOREIGNLAMBDA);
                sum_epot(&(enerd->foreign_grpp), enerd->foreign_term);
                enerd->enerpart_lambda[i] += enerd->foreign_term[F_EPOT];
            }
        }
        wallcycle_sub_stop(wcycle, ewcsNONBONDED);
        where();
    }

    /* If we are doing GB, calculate bonded forces and apply corrections
     * to the solvation forces */
    /* MRS: Eventually, many need to include free energy contribution here! */
    if (ir->implicit_solvent)
    {
        wallcycle_sub_start(wcycle, ewcsLISTED);
        calc_gb_forces(cr, md, born, top, x, f, fr, idef,
                       ir->gb_algorithm, ir->sa_algorithm, nrnb, &pbc, graph, enerd);
        wallcycle_sub_stop(wcycle, ewcsLISTED);
    }

#ifdef GMX_MPI
    if (TAKETIME)
    {
        t1          = MPI_Wtime();
        fr->t_fnbf += t1-t0;
    }
#endif

    if (fepvals->sc_alpha != 0)
    {
        enerd->dvdl_nonlin[efptVDW] += dvdl_nb[efptVDW];
    }
    else
    {
        enerd->dvdl_lin[efptVDW] += dvdl_nb[efptVDW];
    }

    if (fepvals->sc_alpha != 0)

    /* even though coulomb part is linear, we already added it, beacuse we
       need to go through the vdw calculation anyway */
    {
        enerd->dvdl_nonlin[efptCOUL] += dvdl_nb[efptCOUL];
    }
    else
    {
        enerd->dvdl_lin[efptCOUL] += dvdl_nb[efptCOUL];
    }

    debug_gmx();


    if (debug)
    {
        pr_rvecs(debug, 0, "fshift after SR", fr->fshift, SHIFTS);
    }

    /* Shift the coordinates. Must be done before listed forces and PPPM,
     * but is also necessary for SHAKE and update, therefore it can NOT
     * go when no listed forces have to be evaluated.
     *
     * The shifting and PBC code is deliberately not timed, since with
     * the Verlet scheme it only takes non-zero time with triclinic
     * boxes, and even then the time is around a factor of 100 less
     * than the next smallest counter.
     */


    /* Here sometimes we would not need to shift with NBFonly,
     * but we do so anyhow for consistency of the returned coordinates.
     */
    if (graph)
    {
        shift_self(graph, box, x);
        if (TRICLINIC(box))
        {
            inc_nrnb(nrnb, eNR_SHIFTX, 2*graph->nnodes);
        }
        else
        {
            inc_nrnb(nrnb, eNR_SHIFTX, graph->nnodes);
        }
    }
    /* Check whether we need to do listed interactions or correct for exclusions */
    if (fr->bMolPBC &&
        ((flags & GMX_FORCE_LISTED)
         || EEL_RF(fr->eeltype) || EEL_FULL(fr->eeltype) || EVDW_PME(fr->vdwtype)))
    {
        /* TODO There are no electrostatics methods that require this
           transformation, when using the Verlet scheme, so update the
           above conditional. */
        /* Since all atoms are in the rectangular or triclinic unit-cell,
         * only single box vector shifts (2 in x) are required.
         */
        set_pbc_dd(&pbc, fr->ePBC, cr->dd, TRUE, box);
    }
    debug_gmx();

    do_force_listed(wcycle, box, ir->fepvals, cr->ms,
                    idef, (const rvec *) x, hist, f, fr,
                    &pbc, graph, enerd, nrnb, lambda, md, fcd,
                    DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL,
                    flags);

    where();

    *cycles_pme = 0;
    clear_mat(fr->vir_el_recip);
    clear_mat(fr->vir_lj_recip);

    /* Do long-range electrostatics and/or LJ-PME, including related short-range
     * corrections.
     */
    if (EEL_FULL(fr->eeltype) || EVDW_PME(fr->vdwtype))
    {
        int  status            = 0;
        real Vlr_q             = 0, Vlr_lj = 0, Vcorr_q = 0, Vcorr_lj = 0;
        real dvdl_long_range_q = 0, dvdl_long_range_lj = 0;

        bSB = (ir->nwall == 2);
        if (bSB)
        {
            copy_mat(box, boxs);
            svmul(ir->wall_ewald_zfac, boxs[ZZ], boxs[ZZ]);
            box_size[ZZ] *= ir->wall_ewald_zfac;
        }

        if (EEL_PME_EWALD(fr->eeltype) || EVDW_PME(fr->vdwtype))
        {
            real dvdl_long_range_correction_q   = 0;
            real dvdl_long_range_correction_lj  = 0;
            /* With the Verlet scheme exclusion forces are calculated
             * in the non-bonded kernel.
             */
            /* The TPI molecule does not have exclusions with the rest
             * of the system and no intra-molecular PME grid
             * contributions will be calculated in
             * gmx_pme_calc_energy.
             */
            if ((ir->cutoff_scheme == ecutsGROUP && fr->n_tpi == 0) ||
                ir->ewald_geometry != eewg3D ||
                ir->epsilon_surface != 0)
            {
                int nthreads, t;

                wallcycle_sub_start(wcycle, ewcsEWALD_CORRECTION);

                if (fr->n_tpi > 0)
                {
                    gmx_fatal(FARGS, "TPI with PME currently only works in a 3D geometry with tin-foil boundary conditions");
                }

                nthreads = fr->nthread_ewc;
#pragma omp parallel for num_threads(nthreads) schedule(static)
                for (t = 0; t < nthreads; t++)
                {
                    try
                    {
                        tensor *vir_q, *vir_lj;
                        real   *Vcorrt_q, *Vcorrt_lj, *dvdlt_q, *dvdlt_lj;
                        if (t == 0)
                        {
                            vir_q     = &fr->vir_el_recip;
                            vir_lj    = &fr->vir_lj_recip;
                            Vcorrt_q  = &Vcorr_q;
                            Vcorrt_lj = &Vcorr_lj;
                            dvdlt_q   = &dvdl_long_range_correction_q;
                            dvdlt_lj  = &dvdl_long_range_correction_lj;
                        }
                        else
                        {
                            vir_q     = &fr->ewc_t[t].vir_q;
                            vir_lj    = &fr->ewc_t[t].vir_lj;
                            Vcorrt_q  = &fr->ewc_t[t].Vcorr_q;
                            Vcorrt_lj = &fr->ewc_t[t].Vcorr_lj;
                            dvdlt_q   = &fr->ewc_t[t].dvdl[efptCOUL];
                            dvdlt_lj  = &fr->ewc_t[t].dvdl[efptVDW];
                            clear_mat(*vir_q);
                            clear_mat(*vir_lj);
                        }
                        *dvdlt_q  = 0;
                        *dvdlt_lj = 0;

                        /* Threading is only supported with the Verlet cut-off
                         * scheme and then only single particle forces (no
                         * exclusion forces) are calculated, so we can store
                         * the forces in the normal, single fr->f_novirsum array.
                         */
                        ewald_LRcorrection(fr->excl_load[t], fr->excl_load[t+1],
                                           cr, t, fr,
                                           md->chargeA, md->chargeB,
                                           md->sqrt_c6A, md->sqrt_c6B,
                                           md->sigmaA, md->sigmaB,
                                           md->sigma3A, md->sigma3B,
                                           md->nChargePerturbed || md->nTypePerturbed,
                                           ir->cutoff_scheme != ecutsVERLET,
                                           excl, x, bSB ? boxs : box, mu_tot,
                                           ir->ewald_geometry,
                                           ir->epsilon_surface,
                                           fr->f_novirsum, *vir_q, *vir_lj,
                                           Vcorrt_q, Vcorrt_lj,
                                           lambda[efptCOUL], lambda[efptVDW],
                                           dvdlt_q, dvdlt_lj);
                    }
                    GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
                }
                if (nthreads > 1)
                {
                    reduce_thread_energies(fr->vir_el_recip, fr->vir_lj_recip,
                                           &Vcorr_q, &Vcorr_lj,
                                           &dvdl_long_range_correction_q,
                                           &dvdl_long_range_correction_lj,
                                           nthreads, fr->ewc_t);
                }
                wallcycle_sub_stop(wcycle, ewcsEWALD_CORRECTION);
            }
예제 #3
0
void do_force_lowlevel(t_forcerec *fr,      t_inputrec *ir,
                       t_idef     *idef,    t_commrec  *cr,
                       t_nrnb     *nrnb,    gmx_wallcycle_t wcycle,
                       t_mdatoms  *md,
                       rvec       x[],      history_t  *hist,
                       rvec       f[],
                       rvec       f_longrange[],
                       gmx_enerdata_t *enerd,
                       t_fcdata   *fcd,
                       gmx_localtop_t *top,
                       gmx_genborn_t *born,
                       gmx_bool       bBornRadii,
                       matrix     box,
                       t_lambda   *fepvals,
                       real       *lambda,
                       t_graph    *graph,
                       t_blocka   *excl,
                       rvec       mu_tot[],
                       int        flags,
                       float      *cycles_pme)
{
    int         i, j;
    int         donb_flags;
    gmx_bool    bSB;
    int         pme_flags;
    matrix      boxs;
    rvec        box_size;
    t_pbc       pbc;
    real        dvdl_dum[efptNR], dvdl_nb[efptNR];

#ifdef GMX_MPI
    double  t0 = 0.0, t1, t2, t3; /* time measurement for coarse load balancing */
#endif

    set_pbc(&pbc, fr->ePBC, box);

    /* reset free energy components */
    for (i = 0; i < efptNR; i++)
    {
        dvdl_nb[i]  = 0;
        dvdl_dum[i] = 0;
    }

    /* Reset box */
    for (i = 0; (i < DIM); i++)
    {
        box_size[i] = box[i][i];
    }

    debug_gmx();

    /* do QMMM first if requested */
    if (fr->bQMMM)
    {
        enerd->term[F_EQM] = calculate_QMMM(cr, x, f, fr);
    }

    /* Call the short range functions all in one go. */

#ifdef GMX_MPI
    /*#define TAKETIME ((cr->npmenodes) && (fr->timesteps < 12))*/
#define TAKETIME FALSE
    if (TAKETIME)
    {
        MPI_Barrier(cr->mpi_comm_mygroup);
        t0 = MPI_Wtime();
    }
#endif

    if (ir->nwall)
    {
        /* foreign lambda component for walls */
        real dvdl_walls = do_walls(ir, fr, box, md, x, f, lambda[efptVDW],
                                   enerd->grpp.ener[egLJSR], nrnb);
        enerd->dvdl_lin[efptVDW] += dvdl_walls;
    }

    /* If doing GB, reset dvda and calculate the Born radii */
    if (ir->implicit_solvent)
    {
        wallcycle_sub_start(wcycle, ewcsNONBONDED);

        for (i = 0; i < born->nr; i++)
        {
            fr->dvda[i] = 0;
        }

        if (bBornRadii)
        {
            calc_gb_rad(cr, fr, ir, top, x, &(fr->gblist), born, md, nrnb);
        }

        wallcycle_sub_stop(wcycle, ewcsNONBONDED);
    }

    where();
    /* We only do non-bonded calculation with group scheme here, the verlet
     * calls are done from do_force_cutsVERLET(). */
    if (fr->cutoff_scheme == ecutsGROUP && (flags & GMX_FORCE_NONBONDED))
    {
        donb_flags = 0;
        /* Add short-range interactions */
        donb_flags |= GMX_NONBONDED_DO_SR;

        /* Currently all group scheme kernels always calculate (shift-)forces */
        if (flags & GMX_FORCE_FORCES)
        {
            donb_flags |= GMX_NONBONDED_DO_FORCE;
        }
        if (flags & GMX_FORCE_VIRIAL)
        {
            donb_flags |= GMX_NONBONDED_DO_SHIFTFORCE;
        }
        if (flags & GMX_FORCE_ENERGY)
        {
            donb_flags |= GMX_NONBONDED_DO_POTENTIAL;
        }
        if (flags & GMX_FORCE_DO_LR)
        {
            donb_flags |= GMX_NONBONDED_DO_LR;
        }

        wallcycle_sub_start(wcycle, ewcsNONBONDED);
        do_nonbonded(fr, x, f, f_longrange, md, excl,
                     &enerd->grpp, nrnb,
                     lambda, dvdl_nb, -1, -1, donb_flags);

        /* If we do foreign lambda and we have soft-core interactions
         * we have to recalculate the (non-linear) energies contributions.
         */
        if (fepvals->n_lambda > 0 && (flags & GMX_FORCE_DHDL) && fepvals->sc_alpha != 0)
        {
            for (i = 0; i < enerd->n_lambda; i++)
            {
                real lam_i[efptNR];

                for (j = 0; j < efptNR; j++)
                {
                    lam_i[j] = (i == 0 ? lambda[j] : fepvals->all_lambda[j][i-1]);
                }
                reset_foreign_enerdata(enerd);
                do_nonbonded(fr, x, f, f_longrange, md, excl,
                             &(enerd->foreign_grpp), nrnb,
                             lam_i, dvdl_dum, -1, -1,
                             (donb_flags & ~GMX_NONBONDED_DO_FORCE) | GMX_NONBONDED_DO_FOREIGNLAMBDA);
                sum_epot(&(enerd->foreign_grpp), enerd->foreign_term);
                enerd->enerpart_lambda[i] += enerd->foreign_term[F_EPOT];
            }
        }
        wallcycle_sub_stop(wcycle, ewcsNONBONDED);
        where();
    }

    /* If we are doing GB, calculate bonded forces and apply corrections
     * to the solvation forces */
    /* MRS: Eventually, many need to include free energy contribution here! */
    if (ir->implicit_solvent)
    {
        wallcycle_sub_start(wcycle, ewcsLISTED);
        calc_gb_forces(cr, md, born, top, x, f, fr, idef,
                       ir->gb_algorithm, ir->sa_algorithm, nrnb, &pbc, graph, enerd);
        wallcycle_sub_stop(wcycle, ewcsLISTED);
    }

#ifdef GMX_MPI
    if (TAKETIME)
    {
        t1          = MPI_Wtime();
        fr->t_fnbf += t1-t0;
    }
#endif

    if (fepvals->sc_alpha != 0)
    {
        enerd->dvdl_nonlin[efptVDW] += dvdl_nb[efptVDW];
    }
    else
    {
        enerd->dvdl_lin[efptVDW] += dvdl_nb[efptVDW];
    }

    if (fepvals->sc_alpha != 0)

    /* even though coulomb part is linear, we already added it, beacuse we
       need to go through the vdw calculation anyway */
    {
        enerd->dvdl_nonlin[efptCOUL] += dvdl_nb[efptCOUL];
    }
    else
    {
        enerd->dvdl_lin[efptCOUL] += dvdl_nb[efptCOUL];
    }

    debug_gmx();


    if (debug)
    {
        pr_rvecs(debug, 0, "fshift after SR", fr->fshift, SHIFTS);
    }

    /* Shift the coordinates. Must be done before listed forces and PPPM,
     * but is also necessary for SHAKE and update, therefore it can NOT
     * go when no listed forces have to be evaluated.
     *
     * The shifting and PBC code is deliberately not timed, since with
     * the Verlet scheme it only takes non-zero time with triclinic
     * boxes, and even then the time is around a factor of 100 less
     * than the next smallest counter.
     */


    /* Here sometimes we would not need to shift with NBFonly,
     * but we do so anyhow for consistency of the returned coordinates.
     */
    if (graph)
    {
        shift_self(graph, box, x);
        if (TRICLINIC(box))
        {
            inc_nrnb(nrnb, eNR_SHIFTX, 2*graph->nnodes);
        }
        else
        {
            inc_nrnb(nrnb, eNR_SHIFTX, graph->nnodes);
        }
    }
    /* Check whether we need to do listed interactions or correct for exclusions */
    if (fr->bMolPBC &&
        ((flags & GMX_FORCE_LISTED)
         || EEL_RF(fr->eeltype) || EEL_FULL(fr->eeltype) || EVDW_PME(fr->vdwtype)))
    {
        /* TODO There are no electrostatics methods that require this
           transformation, when using the Verlet scheme, so update the
           above conditional. */
        /* Since all atoms are in the rectangular or triclinic unit-cell,
         * only single box vector shifts (2 in x) are required.
         */
        set_pbc_dd(&pbc, fr->ePBC, cr->dd, TRUE, box);
    }
    debug_gmx();

    do_force_listed(wcycle, box, ir->fepvals, cr->ms,
                    idef, (const rvec *) x, hist, f, fr,
                    &pbc, graph, enerd, nrnb, lambda, md, fcd,
                    DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL,
                    flags);

    where();

    *cycles_pme = 0;
    clear_mat(fr->vir_el_recip);
    clear_mat(fr->vir_lj_recip);

    /* Do long-range electrostatics and/or LJ-PME, including related short-range
     * corrections.
     */
    if (EEL_FULL(fr->eeltype) || EVDW_PME(fr->vdwtype))
    {
        int  status            = 0;
        real Vlr_q             = 0, Vlr_lj = 0, Vcorr_q = 0, Vcorr_lj = 0;
        real dvdl_long_range_q = 0, dvdl_long_range_lj = 0;

        bSB = (ir->nwall == 2);
        if (bSB)
        {
            copy_mat(box, boxs);
            svmul(ir->wall_ewald_zfac, boxs[ZZ], boxs[ZZ]);
            box_size[ZZ] *= ir->wall_ewald_zfac;
        }

        if (EEL_PME_EWALD(fr->eeltype) || EVDW_PME(fr->vdwtype))
        {
            real dvdl_long_range_correction_q   = 0;
            real dvdl_long_range_correction_lj  = 0;
            /* With the Verlet scheme exclusion forces are calculated
             * in the non-bonded kernel.
             */
            /* The TPI molecule does not have exclusions with the rest
             * of the system and no intra-molecular PME grid
             * contributions will be calculated in
             * gmx_pme_calc_energy.
             */
            if ((ir->cutoff_scheme == ecutsGROUP && fr->n_tpi == 0) ||
                ir->ewald_geometry != eewg3D ||
                ir->epsilon_surface != 0)
            {
                int nthreads, t;

                wallcycle_sub_start(wcycle, ewcsEWALD_CORRECTION);

                if (fr->n_tpi > 0)
                {
                    gmx_fatal(FARGS, "TPI with PME currently only works in a 3D geometry with tin-foil boundary conditions");
                }

                nthreads = gmx_omp_nthreads_get(emntBonded);
#pragma omp parallel for num_threads(nthreads) schedule(static)
                for (t = 0; t < nthreads; t++)
                {
                    int     i;
                    rvec   *fnv;
                    tensor *vir_q, *vir_lj;
                    real   *Vcorrt_q, *Vcorrt_lj, *dvdlt_q, *dvdlt_lj;
                    if (t == 0)
                    {
                        fnv       = fr->f_novirsum;
                        vir_q     = &fr->vir_el_recip;
                        vir_lj    = &fr->vir_lj_recip;
                        Vcorrt_q  = &Vcorr_q;
                        Vcorrt_lj = &Vcorr_lj;
                        dvdlt_q   = &dvdl_long_range_correction_q;
                        dvdlt_lj  = &dvdl_long_range_correction_lj;
                    }
                    else
                    {
                        fnv       = fr->f_t[t].f;
                        vir_q     = &fr->f_t[t].vir_q;
                        vir_lj    = &fr->f_t[t].vir_lj;
                        Vcorrt_q  = &fr->f_t[t].Vcorr_q;
                        Vcorrt_lj = &fr->f_t[t].Vcorr_lj;
                        dvdlt_q   = &fr->f_t[t].dvdl[efptCOUL];
                        dvdlt_lj  = &fr->f_t[t].dvdl[efptVDW];
                        for (i = 0; i < fr->natoms_force; i++)
                        {
                            clear_rvec(fnv[i]);
                        }
                        clear_mat(*vir_q);
                        clear_mat(*vir_lj);
                    }
                    *dvdlt_q  = 0;
                    *dvdlt_lj = 0;

                    ewald_LRcorrection(fr->excl_load[t], fr->excl_load[t+1],
                                       cr, t, fr,
                                       md->chargeA, md->chargeB,
                                       md->sqrt_c6A, md->sqrt_c6B,
                                       md->sigmaA, md->sigmaB,
                                       md->sigma3A, md->sigma3B,
                                       md->nChargePerturbed || md->nTypePerturbed,
                                       ir->cutoff_scheme != ecutsVERLET,
                                       excl, x, bSB ? boxs : box, mu_tot,
                                       ir->ewald_geometry,
                                       ir->epsilon_surface,
                                       fnv, *vir_q, *vir_lj,
                                       Vcorrt_q, Vcorrt_lj,
                                       lambda[efptCOUL], lambda[efptVDW],
                                       dvdlt_q, dvdlt_lj);
                }
                if (nthreads > 1)
                {
                    reduce_thread_forces(fr->natoms_force, fr->f_novirsum,
                                         fr->vir_el_recip, fr->vir_lj_recip,
                                         &Vcorr_q, &Vcorr_lj,
                                         &dvdl_long_range_correction_q,
                                         &dvdl_long_range_correction_lj,
                                         nthreads, fr->f_t);
                }
                wallcycle_sub_stop(wcycle, ewcsEWALD_CORRECTION);
            }

            if (EEL_PME_EWALD(fr->eeltype) && fr->n_tpi == 0)
            {
                /* This is not in a subcounter because it takes a
                   negligible and constant-sized amount of time */
                Vcorr_q += ewald_charge_correction(cr, fr, lambda[efptCOUL], box,
                                                   &dvdl_long_range_correction_q,
                                                   fr->vir_el_recip);
            }

            enerd->dvdl_lin[efptCOUL] += dvdl_long_range_correction_q;
            enerd->dvdl_lin[efptVDW]  += dvdl_long_range_correction_lj;

            if ((EEL_PME(fr->eeltype) || EVDW_PME(fr->vdwtype)) && (cr->duty & DUTY_PME))
            {
                /* Do reciprocal PME for Coulomb and/or LJ. */
                assert(fr->n_tpi >= 0);
                if (fr->n_tpi == 0 || (flags & GMX_FORCE_STATECHANGED))
                {
                    pme_flags = GMX_PME_SPREAD | GMX_PME_SOLVE;
                    if (EEL_PME(fr->eeltype))
                    {
                        pme_flags     |= GMX_PME_DO_COULOMB;
                    }
                    if (EVDW_PME(fr->vdwtype))
                    {
                        pme_flags |= GMX_PME_DO_LJ;
                    }
                    if (flags & GMX_FORCE_FORCES)
                    {
                        pme_flags |= GMX_PME_CALC_F;
                    }
                    if (flags & GMX_FORCE_VIRIAL)
                    {
                        pme_flags |= GMX_PME_CALC_ENER_VIR;
                    }
                    if (fr->n_tpi > 0)
                    {
                        /* We don't calculate f, but we do want the potential */
                        pme_flags |= GMX_PME_CALC_POT;
                    }
                    wallcycle_start(wcycle, ewcPMEMESH);
                    status = gmx_pme_do(fr->pmedata,
                                        0, md->homenr - fr->n_tpi,
                                        x, fr->f_novirsum,
                                        md->chargeA, md->chargeB,
                                        md->sqrt_c6A, md->sqrt_c6B,
                                        md->sigmaA, md->sigmaB,
                                        bSB ? boxs : box, cr,
                                        DOMAINDECOMP(cr) ? dd_pme_maxshift_x(cr->dd) : 0,
                                        DOMAINDECOMP(cr) ? dd_pme_maxshift_y(cr->dd) : 0,
                                        nrnb, wcycle,
                                        fr->vir_el_recip, fr->ewaldcoeff_q,
                                        fr->vir_lj_recip, fr->ewaldcoeff_lj,
                                        &Vlr_q, &Vlr_lj,
                                        lambda[efptCOUL], lambda[efptVDW],
                                        &dvdl_long_range_q, &dvdl_long_range_lj, pme_flags);
                    *cycles_pme = wallcycle_stop(wcycle, ewcPMEMESH);
                    if (status != 0)
                    {
                        gmx_fatal(FARGS, "Error %d in reciprocal PME routine", status);
                    }
                    /* We should try to do as little computation after
                     * this as possible, because parallel PME synchronizes
                     * the nodes, so we want all load imbalance of the
                     * rest of the force calculation to be before the PME
                     * call.  DD load balancing is done on the whole time
                     * of the force call (without PME).
                     */
                }
                if (fr->n_tpi > 0)
                {
                    if (EVDW_PME(ir->vdwtype))
                    {

                        gmx_fatal(FARGS, "Test particle insertion not implemented with LJ-PME");
                    }
                    /* Determine the PME grid energy of the test molecule
                     * with the PME grid potential of the other charges.
                     */
                    gmx_pme_calc_energy(fr->pmedata, fr->n_tpi,
                                        x + md->homenr - fr->n_tpi,
                                        md->chargeA + md->homenr - fr->n_tpi,
                                        &Vlr_q);
                }
            }
        }

        if (!EEL_PME(fr->eeltype) && EEL_PME_EWALD(fr->eeltype))
        {
            Vlr_q = do_ewald(ir, x, fr->f_novirsum,
                             md->chargeA, md->chargeB,
                             box_size, cr, md->homenr,
                             fr->vir_el_recip, fr->ewaldcoeff_q,
                             lambda[efptCOUL], &dvdl_long_range_q, fr->ewald_table);
        }

        /* Note that with separate PME nodes we get the real energies later */
        enerd->dvdl_lin[efptCOUL] += dvdl_long_range_q;
        enerd->dvdl_lin[efptVDW]  += dvdl_long_range_lj;
        enerd->term[F_COUL_RECIP]  = Vlr_q + Vcorr_q;
        enerd->term[F_LJ_RECIP]    = Vlr_lj + Vcorr_lj;
        if (debug)
        {
            fprintf(debug, "Vlr_q = %g, Vcorr_q = %g, Vlr_corr_q = %g\n",
                    Vlr_q, Vcorr_q, enerd->term[F_COUL_RECIP]);
            pr_rvecs(debug, 0, "vir_el_recip after corr", fr->vir_el_recip, DIM);
            pr_rvecs(debug, 0, "fshift after LR Corrections", fr->fshift, SHIFTS);
            fprintf(debug, "Vlr_lj: %g, Vcorr_lj = %g, Vlr_corr_lj = %g\n",
                    Vlr_lj, Vcorr_lj, enerd->term[F_LJ_RECIP]);
            pr_rvecs(debug, 0, "vir_lj_recip after corr", fr->vir_lj_recip, DIM);
        }
    }
    else
    {
        /* Is there a reaction-field exclusion correction needed? */
        if (EEL_RF(fr->eeltype) && eelRF_NEC != fr->eeltype)
        {
            /* With the Verlet scheme, exclusion forces are calculated
             * in the non-bonded kernel.
             */
            if (ir->cutoff_scheme != ecutsVERLET)
            {
                real dvdl_rf_excl      = 0;
                enerd->term[F_RF_EXCL] =
                    RF_excl_correction(fr, graph, md, excl, x, f,
                                       fr->fshift, &pbc, lambda[efptCOUL], &dvdl_rf_excl);

                enerd->dvdl_lin[efptCOUL] += dvdl_rf_excl;
            }
        }
    }
    where();
    debug_gmx();

    if (debug)
    {
        print_nrnb(debug, nrnb);
    }
    debug_gmx();

#ifdef GMX_MPI
    if (TAKETIME)
    {
        t2 = MPI_Wtime();
        MPI_Barrier(cr->mpi_comm_mygroup);
        t3          = MPI_Wtime();
        fr->t_wait += t3-t2;
        if (fr->timesteps == 11)
        {
            char buf[22];
            fprintf(stderr, "* PP load balancing info: rank %d, step %s, rel wait time=%3.0f%% , load string value: %7.2f\n",
                    cr->nodeid, gmx_step_str(fr->timesteps, buf),
                    100*fr->t_wait/(fr->t_wait+fr->t_fnbf),
                    (fr->t_fnbf+fr->t_wait)/fr->t_fnbf);
        }
        fr->timesteps++;
    }
#endif

    if (debug)
    {
        pr_rvecs(debug, 0, "fshift after bondeds", fr->fshift, SHIFTS);
    }

}
예제 #4
0
파일: force.c 프로젝트: nrego/indus
void do_force_lowlevel(FILE       *fplog,   gmx_large_int_t step,
                       t_forcerec *fr,      t_inputrec *ir,
                       t_idef     *idef,    t_commrec  *cr,
                       t_nrnb     *nrnb,    gmx_wallcycle_t wcycle,
                       t_mdatoms  *md,
                       t_grpopts  *opts,
                       rvec       x[],      history_t  *hist,
                       rvec       f[],
                       gmx_enerdata_t *enerd,
                       t_fcdata   *fcd,
                       gmx_mtop_t     *mtop,
                       gmx_localtop_t *top,
                       gmx_genborn_t *born,
                       t_atomtypes *atype,
                       gmx_bool       bBornRadii,
                       matrix     box,
                       real       lambda,
                       t_graph    *graph,
                       t_blocka   *excl,
                       rvec       mu_tot[],
                       int        flags,
                       float      *cycles_pme)
{
    int     i,status;
    int     donb_flags;
    gmx_bool    bDoEpot,bSepDVDL,bSB;
    int     pme_flags;
    matrix  boxs;
    rvec    box_size;
    real    dvdlambda,Vsr,Vlr,Vcorr=0,vdip,vcharge;
    t_pbc   pbc;
    real    dvdgb;
    char    buf[22];
    gmx_enerdata_t ed_lam;
    double  lam_i;
    real    dvdl_dum;

#ifdef GMX_MPI
    double  t0=0.0,t1,t2,t3; /* time measurement for coarse load balancing */
#endif

#define PRINT_SEPDVDL(s,v,dvdl) if (bSepDVDL) fprintf(fplog,sepdvdlformat,s,v,dvdl);

    GMX_MPE_LOG(ev_force_start);
    set_pbc(&pbc,fr->ePBC,box);

    /* Reset box */
    for(i=0; (i<DIM); i++)
    {
        box_size[i]=box[i][i];
    }

    bSepDVDL=(fr->bSepDVDL && do_per_step(step,ir->nstlog));
    debug_gmx();

    /* do QMMM first if requested */
    if(fr->bQMMM)
    {
        enerd->term[F_EQM] = calculate_QMMM(cr,x,f,fr,md);
    }

    if (bSepDVDL)
    {
        fprintf(fplog,"Step %s: non-bonded V and dVdl for node %d:\n",
                gmx_step_str(step,buf),cr->nodeid);
    }

    /* Call the short range functions all in one go. */
    GMX_MPE_LOG(ev_do_fnbf_start);

    dvdlambda = 0;

#ifdef GMX_MPI
    /*#define TAKETIME ((cr->npmenodes) && (fr->timesteps < 12))*/
#define TAKETIME FALSE
    if (TAKETIME)
    {
        MPI_Barrier(cr->mpi_comm_mygroup);
        t0=MPI_Wtime();
    }
#endif

    if (ir->nwall)
    {
        dvdlambda = do_walls(ir,fr,box,md,x,f,lambda,
                             enerd->grpp.ener[egLJSR],nrnb);
        PRINT_SEPDVDL("Walls",0.0,dvdlambda);
        enerd->dvdl_lin += dvdlambda;
    }

    /* If doing GB, reset dvda and calculate the Born radii */
    if (ir->implicit_solvent)
    {
        /* wallcycle_start(wcycle,ewcGB); */

        for(i=0; i<born->nr; i++)
        {
            fr->dvda[i]=0;
        }

        if(bBornRadii)
        {
            calc_gb_rad(cr,fr,ir,top,atype,x,&(fr->gblist),born,md,nrnb);
        }

        /* wallcycle_stop(wcycle, ewcGB); */
    }

    where();
    donb_flags = 0;
    if (flags & GMX_FORCE_FORCES)
    {
        donb_flags |= GMX_DONB_FORCES;
    }
    do_nonbonded(cr,fr,x,f,md,excl,
                 fr->bBHAM ?
                 enerd->grpp.ener[egBHAMSR] :
                 enerd->grpp.ener[egLJSR],
                 enerd->grpp.ener[egCOULSR],
                 enerd->grpp.ener[egGB],box_size,nrnb,
                 lambda,&dvdlambda,-1,-1,donb_flags);
    /* If we do foreign lambda and we have soft-core interactions
     * we have to recalculate the (non-linear) energies contributions.
     */
    if (ir->n_flambda > 0 && (flags & GMX_FORCE_DHDL) && ir->sc_alpha != 0)
    {
        init_enerdata(mtop->groups.grps[egcENER].nr,ir->n_flambda,&ed_lam);

        for(i=0; i<enerd->n_lambda; i++)
        {
            lam_i = (i==0 ? lambda : ir->flambda[i-1]);
            dvdl_dum = 0;
            reset_enerdata(&ir->opts,fr,TRUE,&ed_lam,FALSE);
            do_nonbonded(cr,fr,x,f,md,excl,
                         fr->bBHAM ?
                         ed_lam.grpp.ener[egBHAMSR] :
                         ed_lam.grpp.ener[egLJSR],
                         ed_lam.grpp.ener[egCOULSR],
                         enerd->grpp.ener[egGB], box_size,nrnb,
                         lam_i,&dvdl_dum,-1,-1,
                         GMX_DONB_FOREIGNLAMBDA);
            sum_epot(&ir->opts,&ed_lam);
            enerd->enerpart_lambda[i] += ed_lam.term[F_EPOT];
        }
        destroy_enerdata(&ed_lam);
    }
    where();

    /* If we are doing GB, calculate bonded forces and apply corrections
     * to the solvation forces */
    if (ir->implicit_solvent)  {
        calc_gb_forces(cr,md,born,top,atype,x,f,fr,idef,
                       ir->gb_algorithm,ir->sa_algorithm,nrnb,bBornRadii,&pbc,graph,enerd);
    }

#ifdef GMX_MPI
    if (TAKETIME)
    {
        t1=MPI_Wtime();
        fr->t_fnbf += t1-t0;
    }
#endif

    if (ir->sc_alpha != 0)
    {
        enerd->dvdl_nonlin += dvdlambda;
    }
    else
    {
        enerd->dvdl_lin    += dvdlambda;
    }
    Vsr = 0;
    if (bSepDVDL)
    {
        for(i=0; i<enerd->grpp.nener; i++)
        {
            Vsr +=
                (fr->bBHAM ?
                 enerd->grpp.ener[egBHAMSR][i] :
                 enerd->grpp.ener[egLJSR][i])
                + enerd->grpp.ener[egCOULSR][i] + enerd->grpp.ener[egGB][i];
        }
    }
    PRINT_SEPDVDL("VdW and Coulomb SR particle-p.",Vsr,dvdlambda);
    debug_gmx();

    GMX_MPE_LOG(ev_do_fnbf_finish);

    if (debug)
    {
        pr_rvecs(debug,0,"fshift after SR",fr->fshift,SHIFTS);
    }

    /* Shift the coordinates. Must be done before bonded forces and PPPM,
     * but is also necessary for SHAKE and update, therefore it can NOT
     * go when no bonded forces have to be evaluated.
     */

    /* Here sometimes we would not need to shift with NBFonly,
     * but we do so anyhow for consistency of the returned coordinates.
     */
    if (graph)
    {
        shift_self(graph,box,x);
        if (TRICLINIC(box))
        {
            inc_nrnb(nrnb,eNR_SHIFTX,2*graph->nnodes);
        }
        else
        {
            inc_nrnb(nrnb,eNR_SHIFTX,graph->nnodes);
        }
    }
    /* Check whether we need to do bondeds or correct for exclusions */
    if (fr->bMolPBC &&
            ((flags & GMX_FORCE_BONDED)
             || EEL_RF(fr->eeltype) || EEL_FULL(fr->eeltype)))
    {
        /* Since all atoms are in the rectangular or triclinic unit-cell,
         * only single box vector shifts (2 in x) are required.
         */
        set_pbc_dd(&pbc,fr->ePBC,cr->dd,TRUE,box);
    }
    debug_gmx();

    if (flags & GMX_FORCE_BONDED)
    {
        GMX_MPE_LOG(ev_calc_bonds_start);
        calc_bonds(fplog,cr->ms,
                   idef,x,hist,f,fr,&pbc,graph,enerd,nrnb,lambda,md,fcd,
                   DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL, atype, born,
                   fr->bSepDVDL && do_per_step(step,ir->nstlog),step);

        /* Check if we have to determine energy differences
         * at foreign lambda's.
         */
        if (ir->n_flambda > 0 && (flags & GMX_FORCE_DHDL) &&
                idef->ilsort != ilsortNO_FE)
        {
            if (idef->ilsort != ilsortFE_SORTED)
            {
                gmx_incons("The bonded interactions are not sorted for free energy");
            }
            init_enerdata(mtop->groups.grps[egcENER].nr,ir->n_flambda,&ed_lam);

            for(i=0; i<enerd->n_lambda; i++)
            {
                lam_i = (i==0 ? lambda : ir->flambda[i-1]);
                dvdl_dum = 0;
                reset_enerdata(&ir->opts,fr,TRUE,&ed_lam,FALSE);
                calc_bonds_lambda(fplog,
                                  idef,x,fr,&pbc,graph,&ed_lam,nrnb,lam_i,md,
                                  fcd,
                                  DOMAINDECOMP(cr) ? cr->dd->gatindex : NULL);
                sum_epot(&ir->opts,&ed_lam);
                enerd->enerpart_lambda[i] += ed_lam.term[F_EPOT];
            }
            destroy_enerdata(&ed_lam);
        }
        debug_gmx();
        GMX_MPE_LOG(ev_calc_bonds_finish);
    }

    where();

    *cycles_pme = 0;
    if (EEL_FULL(fr->eeltype))
    {
        bSB = (ir->nwall == 2);
        if (bSB)
        {
            copy_mat(box,boxs);
            svmul(ir->wall_ewald_zfac,boxs[ZZ],boxs[ZZ]);
            box_size[ZZ] *= ir->wall_ewald_zfac;
        }

        clear_mat(fr->vir_el_recip);

        if (fr->bEwald)
        {
            if (fr->n_tpi == 0)
            {
                dvdlambda = 0;
                Vcorr = ewald_LRcorrection(fplog,md->start,md->start+md->homenr,
                                           cr,fr,
                                           md->chargeA,
                                           md->nChargePerturbed ? md->chargeB : NULL,
                                           excl,x,bSB ? boxs : box,mu_tot,
                                           ir->ewald_geometry,
                                           ir->epsilon_surface,
                                           lambda,&dvdlambda,&vdip,&vcharge);
                PRINT_SEPDVDL("Ewald excl./charge/dip. corr.",Vcorr,dvdlambda);
                enerd->dvdl_lin += dvdlambda;
            }
            else
            {
                if (ir->ewald_geometry != eewg3D || ir->epsilon_surface != 0)
                {
                    gmx_fatal(FARGS,"TPI with PME currently only works in a 3D geometry with tin-foil boundary conditions");
                }
                /* The TPI molecule does not have exclusions with the rest
                 * of the system and no intra-molecular PME grid contributions
                 * will be calculated in gmx_pme_calc_energy.
                 */
                Vcorr = 0;
            }
        }
        else
        {
            Vcorr = shift_LRcorrection(fplog,md->start,md->homenr,cr,fr,
                                       md->chargeA,excl,x,TRUE,box,
                                       fr->vir_el_recip);
        }

        dvdlambda = 0;
        status = 0;
        switch (fr->eeltype)
        {
        case eelPPPM:
            status = gmx_pppm_do(fplog,fr->pmedata,FALSE,x,fr->f_novirsum,
                                 md->chargeA,
                                 box_size,fr->phi,cr,md->start,md->homenr,
                                 nrnb,ir->pme_order,&Vlr);
            break;
        case eelPME:
        case eelPMESWITCH:
        case eelPMEUSER:
        case eelPMEUSERSWITCH:
            if (cr->duty & DUTY_PME)
            {
                if (fr->n_tpi == 0 || (flags & GMX_FORCE_STATECHANGED))
                {
                    pme_flags = GMX_PME_SPREAD_Q | GMX_PME_SOLVE;
                    if (flags & GMX_FORCE_FORCES)
                    {
                        pme_flags |= GMX_PME_CALC_F;
                    }
                    if (flags & GMX_FORCE_VIRIAL)
                    {
                        pme_flags |= GMX_PME_CALC_ENER_VIR;
                    }
                    if (fr->n_tpi > 0)
                    {
                        /* We don't calculate f, but we do want the potential */
                        pme_flags |= GMX_PME_CALC_POT;
                    }
                    wallcycle_start(wcycle,ewcPMEMESH);
                    status = gmx_pme_do(fr->pmedata,
                                        md->start,md->homenr - fr->n_tpi,
                                        x,fr->f_novirsum,
                                        md->chargeA,md->chargeB,
                                        bSB ? boxs : box,cr,
                                        DOMAINDECOMP(cr) ? dd_pme_maxshift_x(cr->dd) : 0,
                                        DOMAINDECOMP(cr) ? dd_pme_maxshift_y(cr->dd) : 0,
                                        nrnb,wcycle,
                                        fr->vir_el_recip,fr->ewaldcoeff,
                                        &Vlr,lambda,&dvdlambda,
                                        pme_flags);
                    *cycles_pme = wallcycle_stop(wcycle,ewcPMEMESH);

                    /* We should try to do as little computation after
                     * this as possible, because parallel PME synchronizes
                     * the nodes, so we want all load imbalance of the rest
                     * of the force calculation to be before the PME call.
                     * DD load balancing is done on the whole time of
                     * the force call (without PME).
                     */
                }
                if (fr->n_tpi > 0)
                {
                    /* Determine the PME grid energy of the test molecule
                     * with the PME grid potential of the other charges.
                     */
                    gmx_pme_calc_energy(fr->pmedata,fr->n_tpi,
                                        x + md->homenr - fr->n_tpi,
                                        md->chargeA + md->homenr - fr->n_tpi,
                                        &Vlr);
                }
                PRINT_SEPDVDL("PME mesh",Vlr,dvdlambda);
            }
            else
            {
                /* Energies and virial are obtained later from the PME nodes */
                /* but values have to be zeroed out here */
                Vlr=0.0;
            }
            break;
        case eelEWALD:
            Vlr = do_ewald(fplog,FALSE,ir,x,fr->f_novirsum,
                           md->chargeA,md->chargeB,
                           box_size,cr,md->homenr,
                           fr->vir_el_recip,fr->ewaldcoeff,
                           lambda,&dvdlambda,fr->ewald_table);
            PRINT_SEPDVDL("Ewald long-range",Vlr,dvdlambda);
            break;
        default:
            Vlr = 0;
            gmx_fatal(FARGS,"No such electrostatics method implemented %s",
                      eel_names[fr->eeltype]);
        }
        if (status != 0)
        {
            gmx_fatal(FARGS,"Error %d in long range electrostatics routine %s",
                      status,EELTYPE(fr->eeltype));
        }
        enerd->dvdl_lin += dvdlambda;
        enerd->term[F_COUL_RECIP] = Vlr + Vcorr;
        if (debug)
        {
            fprintf(debug,"Vlr = %g, Vcorr = %g, Vlr_corr = %g\n",
                    Vlr,Vcorr,enerd->term[F_COUL_RECIP]);
            pr_rvecs(debug,0,"vir_el_recip after corr",fr->vir_el_recip,DIM);
            pr_rvecs(debug,0,"fshift after LR Corrections",fr->fshift,SHIFTS);
        }
    }
    else
    {
        if (EEL_RF(fr->eeltype))
        {
            dvdlambda = 0;

            if (fr->eeltype != eelRF_NEC)
            {
                enerd->term[F_RF_EXCL] =
                    RF_excl_correction(fplog,fr,graph,md,excl,x,f,
                                       fr->fshift,&pbc,lambda,&dvdlambda);
            }

            enerd->dvdl_lin += dvdlambda;
            PRINT_SEPDVDL("RF exclusion correction",
                          enerd->term[F_RF_EXCL],dvdlambda);
        }
    }
    where();
    debug_gmx();

    if (debug)
    {
        print_nrnb(debug,nrnb);
    }
    debug_gmx();

#ifdef GMX_MPI
    if (TAKETIME)
    {
        t2=MPI_Wtime();
        MPI_Barrier(cr->mpi_comm_mygroup);
        t3=MPI_Wtime();
        fr->t_wait += t3-t2;
        if (fr->timesteps == 11)
        {
            fprintf(stderr,"* PP load balancing info: node %d, step %s, rel wait time=%3.0f%% , load string value: %7.2f\n",
                    cr->nodeid, gmx_step_str(fr->timesteps,buf),
                    100*fr->t_wait/(fr->t_wait+fr->t_fnbf),
                    (fr->t_fnbf+fr->t_wait)/fr->t_fnbf);
        }
        fr->timesteps++;
    }
#endif

    if (debug)
    {
        pr_rvecs(debug,0,"fshift after bondeds",fr->fshift,SHIFTS);
    }

    GMX_MPE_LOG(ev_force_finish);

}
예제 #5
0
파일: tank.c 프로젝트: d11/sdl_tank
///////// GAME /////////////
void do_game()
{

	// Reset timer
	old_time = time;

	// Ask SDL for the time in milliseconds
	time = SDL_GetTicks();

	// Print frame rate
	if (PRINT_FPS && (time_since_fps > 1000)) {
		print_fps();
		time_since_fps = 0;
	} else {
		time_since_fps += time - old_time;
	}

	// Work out how much game time has passed since the previous frame
	float dt = (float)(time - old_time)*GAME_SPEED;

	// Maybe create new bot ** TEMP **
	if (rand()/(float)RAND_MAX < 0.01*dt) {
		spawn_bot(bot, 
					 random_int(DISPLAY_WIDTH - PLAYER_BOUND_WIDTH) + PLAYER_BOUND_WIDTH,
					 random_int(DISPLAY_HEIGHT - PLAYER_BOUND_WIDTH) + PLAYER_BOUND_WIDTH,
					 random_angle());
	}

	// Handle game objects
	do_walls(wal);
	do_player(&plr, bul, wal, dt);
	do_bots(bot, &plr, bul, wal, dt);
	do_bullets(bul, dt);

	// check for collisions between various objects
	int bul_i, bot_i, wall_i;
	for (bul_i = 0; bul_i < BULLET_MAX; bul_i++)
	{
		if (bul[bul_i].ex)
		{
			// Check for player being hit by a bullet
			if (player_hit_by_bullet(&plr, &bul[bul_i]))
			{
				bullet_destroy(&bul[bul_i]);
				player_take_bullet(&plr, &bul[bul_i]);
			}


			// Check for bot being hit by a bullet
			for (bot_i = 0; bot_i < BOT_MAX; bot_i++)
			{
				if (bot_hit_by_bullet(&bot[bot_i], &bul[bul_i]))
				{
					bullet_destroy(&bul[bul_i]);
					bot_take_bullet(&bot[bot_i], &bul[bul_i]);
				}
			}
			
			// Check for wall being hit by a bullet
			for (wall_i = 0; wall_i < WALL_MAX; wall_i++)
			{
				if (wall_hit_by_bullet(&wal[wall_i], &bul[bul_i]))
				{
					bullet_destroy(&bul[bul_i]);
					wall_take_bullet(&wal[wall_i]);
				}
			}
		}
	}


}