-/* -*- mode: c; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; c-file-style: "stroustrup"; -*-
+/*
+ * This file is part of the GROMACS molecular simulation package.
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+ * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
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- * This source code is part of
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*/
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include "smalloc.h"
-#include "network.h"
-#include "calcgrid.h"
-#include "pme.h"
-#include "vec.h"
-#include "domdec.h"
-#include "nbnxn_cuda_data_mgmt.h"
-#include "force.h"
-#include "macros.h"
-#include "md_logging.h"
+#include "gmxpre.h"
+
#include "pme_loadbal.h"
+#include "config.h"
+
+#include "gromacs/legacyheaders/calcgrid.h"
+#include "gromacs/legacyheaders/domdec.h"
+#include "gromacs/legacyheaders/force.h"
+#include "gromacs/legacyheaders/macros.h"
+#include "gromacs/legacyheaders/md_logging.h"
+#include "gromacs/legacyheaders/network.h"
+#include "gromacs/legacyheaders/pme.h"
+#include "gromacs/legacyheaders/sim_util.h"
+#include "gromacs/legacyheaders/types/commrec.h"
+#include "gromacs/math/vec.h"
+#include "gromacs/mdlib/nbnxn_cuda/nbnxn_cuda_data_mgmt.h"
+#include "gromacs/pbcutil/pbc.h"
+#include "gromacs/utility/cstringutil.h"
+#include "gromacs/utility/smalloc.h"
+
/* Parameters and setting for one PP-PME setup */
typedef struct {
real rcut_coulomb; /* Coulomb cut-off */
real spacing; /* (largest) PME grid spacing */
ivec grid; /* the PME grid dimensions */
real grid_efficiency; /* ineffiency factor for non-uniform grids <= 1 */
- real ewaldcoeff; /* the Ewald coefficient */
+ real ewaldcoeff_q; /* Electrostatic Ewald coefficient */
+ real ewaldcoeff_lj; /* LJ Ewald coefficient, only for the call to send_switchgrid */
gmx_pme_t pmedata; /* the data structure used in the PME code */
-
int count; /* number of times this setup has been timed */
double cycles; /* the fastest time for this setup in cycles */
} pme_setup_t;
pme_lb->n = 1;
snew(pme_lb->setup, pme_lb->n);
- pme_lb->rcut_vdw = ic->rvdw;
- pme_lb->rcut_coulomb_start = ir->rcoulomb;
- pme_lb->nstcalclr_start = ir->nstcalclr;
-
- pme_lb->cur = 0;
- pme_lb->setup[0].rcut_coulomb = ic->rcoulomb;
- pme_lb->setup[0].rlist = ic->rlist;
- pme_lb->setup[0].rlistlong = ic->rlistlong;
- pme_lb->setup[0].nstcalclr = ir->nstcalclr;
- pme_lb->setup[0].grid[XX] = ir->nkx;
- pme_lb->setup[0].grid[YY] = ir->nky;
- pme_lb->setup[0].grid[ZZ] = ir->nkz;
- pme_lb->setup[0].ewaldcoeff = ic->ewaldcoeff;
+ pme_lb->rcut_vdw = ic->rvdw;
+ pme_lb->rcut_coulomb_start = ir->rcoulomb;
+ pme_lb->nstcalclr_start = ir->nstcalclr;
+
+ pme_lb->cur = 0;
+ pme_lb->setup[0].rcut_coulomb = ic->rcoulomb;
+ pme_lb->setup[0].rlist = ic->rlist;
+ pme_lb->setup[0].rlistlong = ic->rlistlong;
+ pme_lb->setup[0].nstcalclr = ir->nstcalclr;
+ pme_lb->setup[0].grid[XX] = ir->nkx;
+ pme_lb->setup[0].grid[YY] = ir->nky;
+ pme_lb->setup[0].grid[ZZ] = ir->nkz;
+ pme_lb->setup[0].ewaldcoeff_q = ic->ewaldcoeff_q;
+ pme_lb->setup[0].ewaldcoeff_lj = ic->ewaldcoeff_lj;
pme_lb->setup[0].pmedata = pmedata;
*pme_lb_p = pme_lb;
}
-static gmx_bool pme_loadbal_increase_cutoff(pme_load_balancing_t pme_lb,
- int pme_order,
+static gmx_bool pme_loadbal_increase_cutoff(pme_load_balancing_t pme_lb,
+ int pme_order,
const gmx_domdec_t *dd)
{
pme_setup_t *set;
set->grid_efficiency *= (set->grid[d]*sp)/norm(pme_lb->box_start[d]);
}
/* The Ewald coefficient is inversly proportional to the cut-off */
- set->ewaldcoeff =
- pme_lb->setup[0].ewaldcoeff*pme_lb->setup[0].rcut_coulomb/set->rcut_coulomb;
+ set->ewaldcoeff_q =
+ pme_lb->setup[0].ewaldcoeff_q*pme_lb->setup[0].rcut_coulomb/set->rcut_coulomb;
+ /* We set ewaldcoeff_lj in set, even when LJ-PME is not used */
+ set->ewaldcoeff_lj =
+ pme_lb->setup[0].ewaldcoeff_lj*pme_lb->setup[0].rcut_coulomb/set->rcut_coulomb;
set->count = 0;
set->cycles = 0;
}
static void print_loadbal_limited(FILE *fp_err, FILE *fp_log,
- gmx_large_int_t step,
+ gmx_int64_t step,
pme_load_balancing_t pme_lb)
{
char buf[STRLEN], sbuf[22];
pme_lb->cur = pme_lb->start - 1;
}
-gmx_bool pme_load_balance(pme_load_balancing_t pme_lb,
- t_commrec *cr,
- FILE *fp_err,
- FILE *fp_log,
- t_inputrec *ir,
- t_state *state,
- double cycles,
- interaction_const_t *ic,
- nonbonded_verlet_t *nbv,
- gmx_pme_t *pmedata,
- gmx_large_int_t step)
+gmx_bool pme_load_balance(pme_load_balancing_t pme_lb,
+ t_commrec *cr,
+ FILE *fp_err,
+ FILE *fp_log,
+ t_inputrec *ir,
+ t_state *state,
+ double cycles,
+ interaction_const_t *ic,
+ struct nonbonded_verlet_t *nbv,
+ gmx_pme_t *pmedata,
+ gmx_int64_t step)
{
gmx_bool OK;
pme_setup_t *set;
set = &pme_lb->setup[pme_lb->cur];
- ic->rcoulomb = set->rcut_coulomb;
- ic->rlist = set->rlist;
- ic->rlistlong = set->rlistlong;
- ir->nstcalclr = set->nstcalclr;
- ic->ewaldcoeff = set->ewaldcoeff;
-
- bUsesSimpleTables = uses_simple_tables(ir->cutoff_scheme, nbv, 0);
- if (pme_lb->cutoff_scheme == ecutsVERLET &&
- nbv->grp[0].kernel_type == nbnxnk8x8x8_CUDA)
+ ic->rcoulomb = set->rcut_coulomb;
+ ic->rlist = set->rlist;
+ ic->rlistlong = set->rlistlong;
+ ir->nstcalclr = set->nstcalclr;
+ ic->ewaldcoeff_q = set->ewaldcoeff_q;
+ /* TODO: centralize the code that sets the potentials shifts */
+ if (ic->coulomb_modifier == eintmodPOTSHIFT)
{
- nbnxn_cuda_pme_loadbal_update_param(nbv->cu_nbv, ic);
+ ic->sh_ewald = gmx_erfc(ic->ewaldcoeff_q*ic->rcoulomb);
}
- else
+ if (EVDW_PME(ic->vdwtype))
{
- init_interaction_const_tables(NULL, ic, bUsesSimpleTables,
- rtab);
+ /* We have PME for both Coulomb and VdW, set rvdw equal to rcoulomb */
+ ic->rvdw = set->rcut_coulomb;
+ ic->ewaldcoeff_lj = set->ewaldcoeff_lj;
+ if (ic->vdw_modifier == eintmodPOTSHIFT)
+ {
+ real crc2;
+
+ ic->dispersion_shift.cpot = -pow(ic->rvdw, -6.0);
+ ic->repulsion_shift.cpot = -pow(ic->rvdw, -12.0);
+ ic->sh_invrc6 = -ic->dispersion_shift.cpot;
+ crc2 = sqr(ic->ewaldcoeff_lj*ic->rvdw);
+ ic->sh_lj_ewald = (exp(-crc2)*(1 + crc2 + 0.5*crc2*crc2) - 1)*pow(ic->rvdw, -6.0);
+ }
}
- if (pme_lb->cutoff_scheme == ecutsVERLET && nbv->ngrp > 1)
+ bUsesSimpleTables = uses_simple_tables(ir->cutoff_scheme, nbv, 0);
+ nbnxn_cuda_pme_loadbal_update_param(nbv, ic);
+
+ /* With tMPI + GPUs some ranks may be sharing GPU(s) and therefore
+ * also sharing texture references. To keep the code simple, we don't
+ * treat texture references as shared resources, but this means that
+ * the coulomb_tab texture ref will get updated by multiple threads.
+ * Hence, to ensure that the non-bonded kernels don't start before all
+ * texture binding operations are finished, we need to wait for all ranks
+ * to arrive here before continuing.
+ *
+ * Note that we could omit this barrier if GPUs are not shared (or
+ * texture objects are used), but as this is initialization code, there
+ * is not point in complicating things.
+ */
+#ifdef GMX_THREAD_MPI
+ if (PAR(cr) && use_GPU(nbv))
{
- init_interaction_const_tables(NULL, ic, bUsesSimpleTables,
- rtab);
+ gmx_barrier(cr);
}
+#endif /* GMX_THREAD_MPI */
+
+ /* Usually we won't need the simple tables with GPUs.
+ * But we do with hybrid acceleration and with free energy.
+ * To avoid bugs, we always re-initialize the simple tables here.
+ */
+ init_interaction_const_tables(NULL, ic, bUsesSimpleTables, rtab);
if (cr->duty & DUTY_PME)
{
else
{
/* Tell our PME-only node to switch grid */
- gmx_pme_send_switchgrid(cr, set->grid, set->ewaldcoeff);
+ gmx_pme_send_switchgrid(cr, set->grid, set->ewaldcoeff_q, set->ewaldcoeff_lj);
}
if (debug)
name,
setup->rcut_coulomb, pme_loadbal_rlist(setup),
setup->grid[XX], setup->grid[YY], setup->grid[ZZ],
- setup->spacing, 1/setup->ewaldcoeff);
+ setup->spacing, 1/setup->ewaldcoeff_q);
}
static void print_pme_loadbal_settings(pme_load_balancing_t pme_lb,
{
md_print_warn(cr, fplog,
"NOTE: PME load balancing increased the non-bonded workload by more than 50%%.\n"
- " For better performance use (more) PME nodes (mdrun -npme),\n"
- " or in case you are beyond the scaling limit, use less nodes in total.\n");
+ " For better performance, use (more) PME ranks (mdrun -npme),\n"
+ " or if you are beyond the scaling limit, use fewer total ranks (or nodes).\n");
}
else
{
biod.pnpi.spb.ru / alexxy / gromacs.git / blobdiff