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39 * \brief Implements the MD runner routine calling all integrators.
41 * \author David van der Spoel <david.vanderspoel@icm.uu.se>
42 * \ingroup module_mdrun
58 #include "gromacs/commandline/filenm.h"
59 #include "gromacs/compat/make_unique.h"
60 #include "gromacs/domdec/domdec.h"
61 #include "gromacs/domdec/domdec_struct.h"
62 #include "gromacs/domdec/localatomsetmanager.h"
63 #include "gromacs/ewald/ewald-utils.h"
64 #include "gromacs/ewald/pme.h"
65 #include "gromacs/ewald/pme-gpu-program.h"
66 #include "gromacs/fileio/checkpoint.h"
67 #include "gromacs/fileio/gmxfio.h"
68 #include "gromacs/fileio/oenv.h"
69 #include "gromacs/fileio/tpxio.h"
70 #include "gromacs/gmxlib/network.h"
71 #include "gromacs/gmxlib/nrnb.h"
72 #include "gromacs/gpu_utils/clfftinitializer.h"
73 #include "gromacs/gpu_utils/gpu_utils.h"
74 #include "gromacs/hardware/cpuinfo.h"
75 #include "gromacs/hardware/detecthardware.h"
76 #include "gromacs/hardware/printhardware.h"
77 #include "gromacs/listed-forces/disre.h"
78 #include "gromacs/listed-forces/gpubonded.h"
79 #include "gromacs/listed-forces/orires.h"
80 #include "gromacs/math/functions.h"
81 #include "gromacs/math/utilities.h"
82 #include "gromacs/math/vec.h"
83 #include "gromacs/mdlib/boxdeformation.h"
84 #include "gromacs/mdlib/calc_verletbuf.h"
85 #include "gromacs/mdlib/forcerec.h"
86 #include "gromacs/mdlib/gmx_omp_nthreads.h"
87 #include "gromacs/mdlib/makeconstraints.h"
88 #include "gromacs/mdlib/md_support.h"
89 #include "gromacs/mdlib/mdatoms.h"
90 #include "gromacs/mdlib/mdrun.h"
91 #include "gromacs/mdlib/membed.h"
92 #include "gromacs/mdlib/nb_verlet.h"
93 #include "gromacs/mdlib/nbnxn_gpu_data_mgmt.h"
94 #include "gromacs/mdlib/nbnxn_search.h"
95 #include "gromacs/mdlib/nbnxn_tuning.h"
96 #include "gromacs/mdlib/ppforceworkload.h"
97 #include "gromacs/mdlib/qmmm.h"
98 #include "gromacs/mdlib/sighandler.h"
99 #include "gromacs/mdlib/sim_util.h"
100 #include "gromacs/mdlib/stophandler.h"
101 #include "gromacs/mdrun/legacymdrunoptions.h"
102 #include "gromacs/mdrun/logging.h"
103 #include "gromacs/mdrun/multisim.h"
104 #include "gromacs/mdrun/simulationcontext.h"
105 #include "gromacs/mdrunutility/mdmodules.h"
106 #include "gromacs/mdrunutility/threadaffinity.h"
107 #include "gromacs/mdtypes/commrec.h"
108 #include "gromacs/mdtypes/fcdata.h"
109 #include "gromacs/mdtypes/inputrec.h"
110 #include "gromacs/mdtypes/md_enums.h"
111 #include "gromacs/mdtypes/observableshistory.h"
112 #include "gromacs/mdtypes/state.h"
113 #include "gromacs/pbcutil/pbc.h"
114 #include "gromacs/pulling/output.h"
115 #include "gromacs/pulling/pull.h"
116 #include "gromacs/pulling/pull_rotation.h"
117 #include "gromacs/restraint/manager.h"
118 #include "gromacs/restraint/restraintmdmodule.h"
119 #include "gromacs/restraint/restraintpotential.h"
120 #include "gromacs/swap/swapcoords.h"
121 #include "gromacs/taskassignment/decidegpuusage.h"
122 #include "gromacs/taskassignment/resourcedivision.h"
123 #include "gromacs/taskassignment/taskassignment.h"
124 #include "gromacs/taskassignment/usergpuids.h"
125 #include "gromacs/timing/wallcycle.h"
126 #include "gromacs/topology/mtop_util.h"
127 #include "gromacs/trajectory/trajectoryframe.h"
128 #include "gromacs/utility/basenetwork.h"
129 #include "gromacs/utility/cstringutil.h"
130 #include "gromacs/utility/exceptions.h"
131 #include "gromacs/utility/fatalerror.h"
132 #include "gromacs/utility/filestream.h"
133 #include "gromacs/utility/gmxassert.h"
134 #include "gromacs/utility/gmxmpi.h"
135 #include "gromacs/utility/logger.h"
136 #include "gromacs/utility/loggerbuilder.h"
137 #include "gromacs/utility/physicalnodecommunicator.h"
138 #include "gromacs/utility/pleasecite.h"
139 #include "gromacs/utility/programcontext.h"
140 #include "gromacs/utility/smalloc.h"
141 #include "gromacs/utility/stringutil.h"
143 #include "integrator.h"
144 #include "replicaexchange.h"
147 #include "corewrap.h"
153 /*! \brief Barrier for safe simultaneous thread access to mdrunner data
155 * Used to ensure that the master thread does not modify mdrunner during copy
156 * on the spawned threads. */
157 static void threadMpiMdrunnerAccessBarrier()
160 MPI_Barrier(MPI_COMM_WORLD);
164 Mdrunner Mdrunner::cloneOnSpawnedThread() const
166 auto newRunner = Mdrunner();
168 // All runners in the same process share a restraint manager resource because it is
169 // part of the interface to the client code, which is associated only with the
170 // original thread. Handles to the same resources can be obtained by copy.
172 newRunner.restraintManager_ = compat::make_unique<RestraintManager>(*restraintManager_);
175 // Copy original cr pointer before master thread can pass the thread barrier
176 newRunner.cr = reinitialize_commrec_for_this_thread(cr);
178 // Copy members of master runner.
179 // \todo Replace with builder when Simulation context and/or runner phases are better defined.
180 // Ref https://redmine.gromacs.org/issues/2587 and https://redmine.gromacs.org/issues/2375
181 newRunner.hw_opt = hw_opt;
182 newRunner.filenames = filenames;
184 newRunner.oenv = oenv;
185 newRunner.mdrunOptions = mdrunOptions;
186 newRunner.domdecOptions = domdecOptions;
187 newRunner.nbpu_opt = nbpu_opt;
188 newRunner.pme_opt = pme_opt;
189 newRunner.pme_fft_opt = pme_fft_opt;
190 newRunner.bonded_opt = bonded_opt;
191 newRunner.nstlist_cmdline = nstlist_cmdline;
192 newRunner.replExParams = replExParams;
193 newRunner.pforce = pforce;
195 newRunner.stopHandlerBuilder_ = compat::make_unique<StopHandlerBuilder>(*stopHandlerBuilder_);
197 threadMpiMdrunnerAccessBarrier();
199 GMX_RELEASE_ASSERT(!MASTER(newRunner.cr), "cloneOnSpawnedThread should only be called on spawned threads");
204 /*! \brief The callback used for running on spawned threads.
206 * Obtains the pointer to the master mdrunner object from the one
207 * argument permitted to the thread-launch API call, copies it to make
208 * a new runner for this thread, reinitializes necessary data, and
209 * proceeds to the simulation. */
210 static void mdrunner_start_fn(const void *arg)
214 auto masterMdrunner = reinterpret_cast<const gmx::Mdrunner *>(arg);
215 /* copy the arg list to make sure that it's thread-local. This
216 doesn't copy pointed-to items, of course; fnm, cr and fplog
217 are reset in the call below, all others should be const. */
218 gmx::Mdrunner mdrunner = masterMdrunner->cloneOnSpawnedThread();
221 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
225 /*! \brief Start thread-MPI threads.
227 * Called by mdrunner() to start a specific number of threads
228 * (including the main thread) for thread-parallel runs. This in turn
229 * calls mdrunner() for each thread. All options are the same as for
231 t_commrec *Mdrunner::spawnThreads(int numThreadsToLaunch) const
234 /* first check whether we even need to start tMPI */
235 if (numThreadsToLaunch < 2)
241 /* now spawn new threads that start mdrunner_start_fn(), while
242 the main thread returns, we set thread affinity later */
243 if (tMPI_Init_fn(TRUE, numThreadsToLaunch, TMPI_AFFINITY_NONE,
244 mdrunner_start_fn, static_cast<const void*>(this)) != TMPI_SUCCESS)
246 GMX_THROW(gmx::InternalError("Failed to spawn thread-MPI threads"));
249 threadMpiMdrunnerAccessBarrier();
251 GMX_UNUSED_VALUE(mdrunner_start_fn);
254 return reinitialize_commrec_for_this_thread(cr);
259 /*! \brief Initialize variables for Verlet scheme simulation */
260 static void prepare_verlet_scheme(FILE *fplog,
264 const gmx_mtop_t *mtop,
266 bool makeGpuPairList,
267 const gmx::CpuInfo &cpuinfo)
269 /* For NVE simulations, we will retain the initial list buffer */
270 if (EI_DYNAMICS(ir->eI) &&
271 ir->verletbuf_tol > 0 &&
272 !(EI_MD(ir->eI) && ir->etc == etcNO))
274 /* Update the Verlet buffer size for the current run setup */
276 /* Here we assume SIMD-enabled kernels are being used. But as currently
277 * calc_verlet_buffer_size gives the same results for 4x8 and 4x4
278 * and 4x2 gives a larger buffer than 4x4, this is ok.
280 ListSetupType listType = (makeGpuPairList ? ListSetupType::Gpu : ListSetupType::CpuSimdWhenSupported);
281 VerletbufListSetup listSetup = verletbufGetSafeListSetup(listType);
284 calc_verlet_buffer_size(mtop, det(box), ir, ir->nstlist, ir->nstlist - 1, -1, &listSetup, nullptr, &rlist_new);
286 if (rlist_new != ir->rlist)
288 if (fplog != nullptr)
290 fprintf(fplog, "\nChanging rlist from %g to %g for non-bonded %dx%d atom kernels\n\n",
291 ir->rlist, rlist_new,
292 listSetup.cluster_size_i, listSetup.cluster_size_j);
294 ir->rlist = rlist_new;
298 if (nstlist_cmdline > 0 && (!EI_DYNAMICS(ir->eI) || ir->verletbuf_tol <= 0))
300 gmx_fatal(FARGS, "Can not set nstlist without %s",
301 !EI_DYNAMICS(ir->eI) ? "dynamics" : "verlet-buffer-tolerance");
304 if (EI_DYNAMICS(ir->eI))
306 /* Set or try nstlist values */
307 increaseNstlist(fplog, cr, ir, nstlist_cmdline, mtop, box, makeGpuPairList, cpuinfo);
311 /*! \brief Override the nslist value in inputrec
313 * with value passed on the command line (if any)
315 static void override_nsteps_cmdline(const gmx::MDLogger &mdlog,
316 int64_t nsteps_cmdline,
321 /* override with anything else than the default -2 */
322 if (nsteps_cmdline > -2)
324 char sbuf_steps[STEPSTRSIZE];
325 char sbuf_msg[STRLEN];
327 ir->nsteps = nsteps_cmdline;
328 if (EI_DYNAMICS(ir->eI) && nsteps_cmdline != -1)
330 sprintf(sbuf_msg, "Overriding nsteps with value passed on the command line: %s steps, %.3g ps",
331 gmx_step_str(nsteps_cmdline, sbuf_steps),
332 fabs(nsteps_cmdline*ir->delta_t));
336 sprintf(sbuf_msg, "Overriding nsteps with value passed on the command line: %s steps",
337 gmx_step_str(nsteps_cmdline, sbuf_steps));
340 GMX_LOG(mdlog.warning).asParagraph().appendText(sbuf_msg);
342 else if (nsteps_cmdline < -2)
344 gmx_fatal(FARGS, "Invalid nsteps value passed on the command line: %" PRId64,
347 /* Do nothing if nsteps_cmdline == -2 */
353 /*! \brief Return whether GPU acceleration of nonbondeds is supported with the given settings.
355 * If not, and if a warning may be issued, logs a warning about
356 * falling back to CPU code. With thread-MPI, only the first
357 * call to this function should have \c issueWarning true. */
358 static bool gpuAccelerationOfNonbondedIsUseful(const MDLogger &mdlog,
359 const t_inputrec *ir,
362 if (ir->opts.ngener - ir->nwall > 1)
364 /* The GPU code does not support more than one energy group.
365 * If the user requested GPUs explicitly, a fatal error is given later.
369 GMX_LOG(mdlog.warning).asParagraph()
370 .appendText("Multiple energy groups is not implemented for GPUs, falling back to the CPU. "
371 "For better performance, run on the GPU without energy groups and then do "
372 "gmx mdrun -rerun option on the trajectory with an energy group .tpr file.");
379 //! Initializes the logger for mdrun.
380 static gmx::LoggerOwner buildLogger(FILE *fplog, const t_commrec *cr)
382 gmx::LoggerBuilder builder;
383 if (fplog != nullptr)
385 builder.addTargetFile(gmx::MDLogger::LogLevel::Info, fplog);
387 if (cr == nullptr || SIMMASTER(cr))
389 builder.addTargetStream(gmx::MDLogger::LogLevel::Warning,
390 &gmx::TextOutputFile::standardError());
392 return builder.build();
395 //! Make a TaskTarget from an mdrun argument string.
396 static TaskTarget findTaskTarget(const char *optionString)
398 TaskTarget returnValue = TaskTarget::Auto;
400 if (strncmp(optionString, "auto", 3) == 0)
402 returnValue = TaskTarget::Auto;
404 else if (strncmp(optionString, "cpu", 3) == 0)
406 returnValue = TaskTarget::Cpu;
408 else if (strncmp(optionString, "gpu", 3) == 0)
410 returnValue = TaskTarget::Gpu;
414 GMX_ASSERT(false, "Option string should have been checked for sanity already");
420 int Mdrunner::mdrunner()
424 t_forcerec *fr = nullptr;
425 t_fcdata *fcd = nullptr;
426 real ewaldcoeff_q = 0;
427 real ewaldcoeff_lj = 0;
428 int nChargePerturbed = -1, nTypePerturbed = 0;
429 gmx_wallcycle_t wcycle;
430 gmx_walltime_accounting_t walltime_accounting = nullptr;
432 int64_t reset_counters;
433 int nthreads_pme = 1;
434 gmx_membed_t * membed = nullptr;
435 gmx_hw_info_t *hwinfo = nullptr;
437 /* CAUTION: threads may be started later on in this function, so
438 cr doesn't reflect the final parallel state right now */
439 std::unique_ptr<gmx::MDModules> mdModules(new gmx::MDModules);
440 t_inputrec inputrecInstance;
441 t_inputrec *inputrec = &inputrecInstance;
444 bool doMembed = opt2bSet("-membed", filenames.size(), filenames.data());
445 bool doRerun = mdrunOptions.rerun;
447 // Handle task-assignment related user options.
448 EmulateGpuNonbonded emulateGpuNonbonded = (getenv("GMX_EMULATE_GPU") != nullptr ?
449 EmulateGpuNonbonded::Yes : EmulateGpuNonbonded::No);
450 std::vector<int> gpuIdsAvailable;
453 gpuIdsAvailable = parseUserGpuIds(hw_opt.gpuIdsAvailable);
454 // TODO We could put the GPU IDs into a std::map to find
455 // duplicates, but for the small numbers of IDs involved, this
456 // code is simple and fast.
457 for (size_t i = 0; i != gpuIdsAvailable.size(); ++i)
459 for (size_t j = i+1; j != gpuIdsAvailable.size(); ++j)
461 if (gpuIdsAvailable[i] == gpuIdsAvailable[j])
463 GMX_THROW(InvalidInputError(formatString("The string of available GPU device IDs '%s' may not contain duplicate device IDs", hw_opt.gpuIdsAvailable.c_str())));
468 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
470 std::vector<int> userGpuTaskAssignment;
473 userGpuTaskAssignment = parseUserGpuIds(hw_opt.userGpuTaskAssignment);
475 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
476 auto nonbondedTarget = findTaskTarget(nbpu_opt);
477 auto pmeTarget = findTaskTarget(pme_opt);
478 auto pmeFftTarget = findTaskTarget(pme_fft_opt);
479 auto bondedTarget = findTaskTarget(bonded_opt);
480 PmeRunMode pmeRunMode = PmeRunMode::None;
482 // Here we assume that SIMMASTER(cr) does not change even after the
483 // threads are started.
485 FILE *fplog = nullptr;
486 // If we are appending, we don't write log output because we need
487 // to check that the old log file matches what the checkpoint file
488 // expects. Otherwise, we should start to write log output now if
489 // there is a file ready for it.
490 if (logFileHandle != nullptr && !mdrunOptions.continuationOptions.appendFiles)
492 fplog = gmx_fio_getfp(logFileHandle);
494 gmx::LoggerOwner logOwner(buildLogger(fplog, cr));
495 gmx::MDLogger mdlog(logOwner.logger());
497 // TODO The thread-MPI master rank makes a working
498 // PhysicalNodeCommunicator here, but it gets rebuilt by all ranks
499 // after the threads have been launched. This works because no use
500 // is made of that communicator until after the execution paths
501 // have rejoined. But it is likely that we can improve the way
502 // this is expressed, e.g. by expressly running detection only the
503 // master rank for thread-MPI, rather than relying on the mutex
504 // and reference count.
505 PhysicalNodeCommunicator physicalNodeComm(MPI_COMM_WORLD, gmx_physicalnode_id_hash());
506 hwinfo = gmx_detect_hardware(mdlog, physicalNodeComm);
508 gmx_print_detected_hardware(fplog, cr, ms, mdlog, hwinfo);
510 std::vector<int> gpuIdsToUse;
511 auto compatibleGpus = getCompatibleGpus(hwinfo->gpu_info);
512 if (gpuIdsAvailable.empty())
514 gpuIdsToUse = compatibleGpus;
518 for (const auto &availableGpuId : gpuIdsAvailable)
520 bool availableGpuIsCompatible = false;
521 for (const auto &compatibleGpuId : compatibleGpus)
523 if (availableGpuId == compatibleGpuId)
525 availableGpuIsCompatible = true;
529 if (!availableGpuIsCompatible)
531 gmx_fatal(FARGS, "You limited the set of compatible GPUs to a set that included ID #%d, but that ID is not for a compatible GPU. List only compatible GPUs.", availableGpuId);
533 gpuIdsToUse.push_back(availableGpuId);
537 if (fplog != nullptr)
539 /* Print references after all software/hardware printing */
540 please_cite(fplog, "Abraham2015");
541 please_cite(fplog, "Pall2015");
542 please_cite(fplog, "Pronk2013");
543 please_cite(fplog, "Hess2008b");
544 please_cite(fplog, "Spoel2005a");
545 please_cite(fplog, "Lindahl2001a");
546 please_cite(fplog, "Berendsen95a");
547 writeSourceDoi(fplog);
550 std::unique_ptr<t_state> globalState;
554 /* Only the master rank has the global state */
555 globalState = compat::make_unique<t_state>();
557 /* Read (nearly) all data required for the simulation */
558 read_tpx_state(ftp2fn(efTPR, filenames.size(), filenames.data()), inputrec, globalState.get(), &mtop);
560 /* In rerun, set velocities to zero if present */
561 if (doRerun && ((globalState->flags & (1 << estV)) != 0))
563 // rerun does not use velocities
564 GMX_LOG(mdlog.info).asParagraph().appendText(
565 "Rerun trajectory contains velocities. Rerun does only evaluate "
566 "potential energy and forces. The velocities will be ignored.");
567 for (int i = 0; i < globalState->natoms; i++)
569 clear_rvec(globalState->v[i]);
571 globalState->flags &= ~(1 << estV);
574 if (inputrec->cutoff_scheme != ecutsVERLET)
576 if (nstlist_cmdline > 0)
578 gmx_fatal(FARGS, "Can not set nstlist with the group cut-off scheme");
581 if (!compatibleGpus.empty())
583 GMX_LOG(mdlog.warning).asParagraph().appendText(
584 "NOTE: GPU(s) found, but the current simulation can not use GPUs\n"
585 " To use a GPU, set the mdp option: cutoff-scheme = Verlet");
590 /* Check and update the hardware options for internal consistency */
591 check_and_update_hw_opt_1(mdlog, &hw_opt, cr, domdecOptions.numPmeRanks);
593 /* Early check for externally set process affinity. */
594 gmx_check_thread_affinity_set(mdlog, cr,
595 &hw_opt, hwinfo->nthreads_hw_avail, FALSE);
597 if (GMX_THREAD_MPI && SIMMASTER(cr))
599 if (domdecOptions.numPmeRanks > 0 && hw_opt.nthreads_tmpi <= 0)
601 gmx_fatal(FARGS, "You need to explicitly specify the number of MPI threads (-ntmpi) when using separate PME ranks");
604 /* Since the master knows the cut-off scheme, update hw_opt for this.
605 * This is done later for normal MPI and also once more with tMPI
606 * for all tMPI ranks.
608 check_and_update_hw_opt_2(&hw_opt, inputrec->cutoff_scheme);
610 bool useGpuForNonbonded = false;
611 bool useGpuForPme = false;
614 // If the user specified the number of ranks, then we must
615 // respect that, but in default mode, we need to allow for
616 // the number of GPUs to choose the number of ranks.
617 auto canUseGpuForNonbonded = buildSupportsNonbondedOnGpu(nullptr);
618 useGpuForNonbonded = decideWhetherToUseGpusForNonbondedWithThreadMpi
619 (nonbondedTarget, gpuIdsToUse, userGpuTaskAssignment, emulateGpuNonbonded,
620 canUseGpuForNonbonded,
621 inputrec->cutoff_scheme == ecutsVERLET,
622 gpuAccelerationOfNonbondedIsUseful(mdlog, inputrec, GMX_THREAD_MPI),
623 hw_opt.nthreads_tmpi);
624 useGpuForPme = decideWhetherToUseGpusForPmeWithThreadMpi
625 (useGpuForNonbonded, pmeTarget, gpuIdsToUse, userGpuTaskAssignment,
626 *hwinfo, *inputrec, mtop, hw_opt.nthreads_tmpi, domdecOptions.numPmeRanks);
629 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
631 /* Determine how many thread-MPI ranks to start.
633 * TODO Over-writing the user-supplied value here does
634 * prevent any possible subsequent checks from working
636 hw_opt.nthreads_tmpi = get_nthreads_mpi(hwinfo,
645 // Now start the threads for thread MPI.
646 cr = spawnThreads(hw_opt.nthreads_tmpi);
647 /* The main thread continues here with a new cr. We don't deallocate
648 the old cr because other threads may still be reading it. */
649 // TODO Both master and spawned threads call dup_tfn and
650 // reinitialize_commrec_for_this_thread. Find a way to express
652 physicalNodeComm = PhysicalNodeCommunicator(MPI_COMM_WORLD, gmx_physicalnode_id_hash());
654 // END OF CAUTION: cr and physicalNodeComm are now reliable
658 /* now broadcast everything to the non-master nodes/threads: */
659 init_parallel(cr, inputrec, &mtop);
662 // Now each rank knows the inputrec that SIMMASTER read and used,
663 // and (if applicable) cr->nnodes has been assigned the number of
664 // thread-MPI ranks that have been chosen. The ranks can now all
665 // run the task-deciding functions and will agree on the result
666 // without needing to communicate.
668 // TODO Should we do the communication in debug mode to support
669 // having an assertion?
671 // Note that these variables describe only their own node.
673 // Note that when bonded interactions run on a GPU they always run
674 // alongside a nonbonded task, so do not influence task assignment
675 // even though they affect the force calculation workload.
676 bool useGpuForNonbonded = false;
677 bool useGpuForPme = false;
678 bool useGpuForBonded = false;
681 // It's possible that there are different numbers of GPUs on
682 // different nodes, which is the user's responsibilty to
683 // handle. If unsuitable, we will notice that during task
685 bool gpusWereDetected = hwinfo->ngpu_compatible_tot > 0;
686 bool usingVerletScheme = inputrec->cutoff_scheme == ecutsVERLET;
687 auto canUseGpuForNonbonded = buildSupportsNonbondedOnGpu(nullptr);
688 useGpuForNonbonded = decideWhetherToUseGpusForNonbonded(nonbondedTarget, userGpuTaskAssignment,
690 canUseGpuForNonbonded,
692 gpuAccelerationOfNonbondedIsUseful(mdlog, inputrec, !GMX_THREAD_MPI),
694 useGpuForPme = decideWhetherToUseGpusForPme(useGpuForNonbonded, pmeTarget, userGpuTaskAssignment,
695 *hwinfo, *inputrec, mtop,
696 cr->nnodes, domdecOptions.numPmeRanks,
698 auto canUseGpuForBonded = buildSupportsGpuBondeds(nullptr) && inputSupportsGpuBondeds(*inputrec, mtop, nullptr);
700 decideWhetherToUseGpusForBonded(useGpuForNonbonded, useGpuForPme, usingVerletScheme,
701 bondedTarget, canUseGpuForBonded,
702 EVDW_PME(inputrec->vdwtype),
703 EEL_PME_EWALD(inputrec->coulombtype),
704 domdecOptions.numPmeRanks, gpusWereDetected);
706 pmeRunMode = (useGpuForPme ? PmeRunMode::GPU : PmeRunMode::CPU);
707 if (pmeRunMode == PmeRunMode::GPU)
709 if (pmeFftTarget == TaskTarget::Cpu)
711 pmeRunMode = PmeRunMode::Mixed;
714 else if (pmeFftTarget == TaskTarget::Gpu)
716 gmx_fatal(FARGS, "Assigning FFTs to GPU requires PME to be assigned to GPU as well. With PME on CPU you should not be using -pmefft.");
719 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
722 // TODO: hide restraint implementation details from Mdrunner.
723 // There is nothing unique about restraints at this point as far as the
724 // Mdrunner is concerned. The Mdrunner should just be getting a sequence of
725 // factory functions from the SimulationContext on which to call mdModules->add().
726 // TODO: capture all restraints into a single RestraintModule, passed to the runner builder.
727 for (auto && restraint : restraintManager_->getRestraints())
729 auto module = RestraintMDModule::create(restraint,
731 mdModules->add(std::move(module));
734 // TODO: Error handling
735 mdModules->assignOptionsToModules(*inputrec->params, nullptr);
737 if (fplog != nullptr)
739 pr_inputrec(fplog, 0, "Input Parameters", inputrec, FALSE);
740 fprintf(fplog, "\n");
745 /* now make sure the state is initialized and propagated */
746 set_state_entries(globalState.get(), inputrec);
749 /* NM and TPI parallelize over force/energy calculations, not atoms,
750 * so we need to initialize and broadcast the global state.
752 if (inputrec->eI == eiNM || inputrec->eI == eiTPI)
756 globalState = compat::make_unique<t_state>();
758 broadcastStateWithoutDynamics(cr, globalState.get());
761 /* A parallel command line option consistency check that we can
762 only do after any threads have started. */
763 if (!PAR(cr) && (domdecOptions.numCells[XX] > 1 ||
764 domdecOptions.numCells[YY] > 1 ||
765 domdecOptions.numCells[ZZ] > 1 ||
766 domdecOptions.numPmeRanks > 0))
769 "The -dd or -npme option request a parallel simulation, "
771 "but %s was compiled without threads or MPI enabled", output_env_get_program_display_name(oenv));
774 "but the number of MPI-threads (option -ntmpi) is not set or is 1");
776 "but %s was not started through mpirun/mpiexec or only one rank was requested through mpirun/mpiexec", output_env_get_program_display_name(oenv));
782 (EI_ENERGY_MINIMIZATION(inputrec->eI) || eiNM == inputrec->eI))
784 gmx_fatal(FARGS, "The .mdp file specified an energy mininization or normal mode algorithm, and these are not compatible with mdrun -rerun");
787 if (can_use_allvsall(inputrec, TRUE, cr, fplog) && DOMAINDECOMP(cr))
789 gmx_fatal(FARGS, "All-vs-all loops do not work with domain decomposition, use a single MPI rank");
792 if (!(EEL_PME(inputrec->coulombtype) || EVDW_PME(inputrec->vdwtype)))
794 if (domdecOptions.numPmeRanks > 0)
796 gmx_fatal_collective(FARGS, cr->mpi_comm_mysim, MASTER(cr),
797 "PME-only ranks are requested, but the system does not use PME for electrostatics or LJ");
800 domdecOptions.numPmeRanks = 0;
803 if (useGpuForNonbonded && domdecOptions.numPmeRanks < 0)
805 /* With NB GPUs we don't automatically use PME-only CPU ranks. PME ranks can
806 * improve performance with many threads per GPU, since our OpenMP
807 * scaling is bad, but it's difficult to automate the setup.
809 domdecOptions.numPmeRanks = 0;
813 if (domdecOptions.numPmeRanks < 0)
815 domdecOptions.numPmeRanks = 0;
816 // TODO possibly print a note that one can opt-in for a separate PME GPU rank?
820 GMX_RELEASE_ASSERT(domdecOptions.numPmeRanks <= 1, "PME GPU decomposition is not supported");
827 fcRegisterSteps(inputrec->nsteps, inputrec->init_step);
831 /* NMR restraints must be initialized before load_checkpoint,
832 * since with time averaging the history is added to t_state.
833 * For proper consistency check we therefore need to extend
835 * So the PME-only nodes (if present) will also initialize
836 * the distance restraints.
840 /* This needs to be called before read_checkpoint to extend the state */
841 init_disres(fplog, &mtop, inputrec, cr, ms, fcd, globalState.get(), replExParams.exchangeInterval > 0);
843 init_orires(fplog, &mtop, inputrec, cr, ms, globalState.get(), &(fcd->orires));
845 auto deform = prepareBoxDeformation(globalState->box, cr, *inputrec);
847 ObservablesHistory observablesHistory = {};
849 ContinuationOptions &continuationOptions = mdrunOptions.continuationOptions;
851 if (continuationOptions.startedFromCheckpoint)
853 /* Check if checkpoint file exists before doing continuation.
854 * This way we can use identical input options for the first and subsequent runs...
858 if (mdrunOptions.numStepsCommandline > -2)
860 /* Temporarily set the number of steps to unmlimited to avoid
861 * triggering the nsteps check in load_checkpoint().
862 * This hack will go away soon when the -nsteps option is removed.
864 inputrec->nsteps = -1;
867 load_checkpoint(opt2fn_master("-cpi", filenames.size(), filenames.data(), cr),
869 cr, domdecOptions.numCells,
870 inputrec, globalState.get(),
871 &bReadEkin, &observablesHistory,
872 continuationOptions.appendFiles,
873 continuationOptions.appendFilesOptionSet,
874 mdrunOptions.reproducible);
878 continuationOptions.haveReadEkin = true;
881 if (continuationOptions.appendFiles && logFileHandle)
883 // Now we can start normal logging to the truncated log file.
884 fplog = gmx_fio_getfp(logFileHandle);
885 prepareLogAppending(fplog);
886 logOwner = buildLogger(fplog, cr);
887 mdlog = logOwner.logger();
891 if (mdrunOptions.numStepsCommandline > -2)
893 GMX_LOG(mdlog.info).asParagraph().
894 appendText("The -nsteps functionality is deprecated, and may be removed in a future version. "
895 "Consider using gmx convert-tpr -nsteps or changing the appropriate .mdp file field.");
897 /* override nsteps with value set on the commamdline */
898 override_nsteps_cmdline(mdlog, mdrunOptions.numStepsCommandline, inputrec);
902 copy_mat(globalState->box, box);
907 gmx_bcast(sizeof(box), box, cr);
910 /* Update rlist and nstlist. */
911 if (inputrec->cutoff_scheme == ecutsVERLET)
913 prepare_verlet_scheme(fplog, cr, inputrec, nstlist_cmdline, &mtop, box,
914 useGpuForNonbonded || (emulateGpuNonbonded == EmulateGpuNonbonded::Yes), *hwinfo->cpuInfo);
917 LocalAtomSetManager atomSets;
919 if (PAR(cr) && !(EI_TPI(inputrec->eI) ||
920 inputrec->eI == eiNM))
922 cr->dd = init_domain_decomposition(mdlog, cr, domdecOptions, mdrunOptions,
924 box, positionsFromStatePointer(globalState.get()),
926 // Note that local state still does not exist yet.
930 /* PME, if used, is done on all nodes with 1D decomposition */
932 cr->duty = (DUTY_PP | DUTY_PME);
934 if (inputrec->ePBC == epbcSCREW)
937 "pbc=screw is only implemented with domain decomposition");
943 /* After possible communicator splitting in make_dd_communicators.
944 * we can set up the intra/inter node communication.
946 gmx_setup_nodecomm(fplog, cr);
952 GMX_LOG(mdlog.warning).asParagraph().appendTextFormatted(
953 "This is simulation %d out of %d running as a composite GROMACS\n"
954 "multi-simulation job. Setup for this simulation:\n",
957 GMX_LOG(mdlog.warning).appendTextFormatted(
961 cr->nnodes == 1 ? "thread" : "threads"
963 cr->nnodes == 1 ? "process" : "processes"
969 /* Check and update hw_opt for the cut-off scheme */
970 check_and_update_hw_opt_2(&hw_opt, inputrec->cutoff_scheme);
972 /* Check and update the number of OpenMP threads requested */
973 checkAndUpdateRequestedNumOpenmpThreads(&hw_opt, *hwinfo, cr, ms, physicalNodeComm.size_,
976 gmx_omp_nthreads_init(mdlog, cr,
977 hwinfo->nthreads_hw_avail,
978 physicalNodeComm.size_,
980 hw_opt.nthreads_omp_pme,
981 !thisRankHasDuty(cr, DUTY_PP),
982 inputrec->cutoff_scheme == ecutsVERLET);
984 // Enable FP exception detection for the Verlet scheme, but not in
985 // Release mode and not for compilers with known buggy FP
986 // exception support (clang with any optimization) or suspected
987 // buggy FP exception support (gcc 7.* with optimization).
988 #if !defined NDEBUG && \
989 !((defined __clang__ || (defined(__GNUC__) && !defined(__ICC) && __GNUC__ == 7)) \
990 && defined __OPTIMIZE__)
991 const bool bEnableFPE = inputrec->cutoff_scheme == ecutsVERLET;
993 const bool bEnableFPE = false;
995 //FIXME - reconcile with gmx_feenableexcept() call from CommandLineModuleManager::run()
998 gmx_feenableexcept();
1001 // Build a data structure that expresses which kinds of non-bonded
1002 // task are handled by this rank.
1004 // TODO Later, this might become a loop over all registered modules
1005 // relevant to the mdp inputs, to find those that have such tasks.
1007 // TODO This could move before init_domain_decomposition() as part
1008 // of refactoring that separates the responsibility for duty
1009 // assignment from setup for communication between tasks, and
1010 // setup for tasks handled with a domain (ie including short-ranged
1011 // tasks, bonded tasks, etc.).
1013 // Note that in general useGpuForNonbonded, etc. can have a value
1014 // that is inconsistent with the presence of actual GPUs on any
1015 // rank, and that is not known to be a problem until the
1016 // duty of the ranks on a node become known.
1018 // TODO Later we might need the concept of computeTasksOnThisRank,
1019 // from which we construct gpuTasksOnThisRank.
1021 // Currently the DD code assigns duty to ranks that can
1022 // include PP work that currently can be executed on a single
1023 // GPU, if present and compatible. This has to be coordinated
1024 // across PP ranks on a node, with possible multiple devices
1025 // or sharing devices on a node, either from the user
1026 // selection, or automatically.
1027 auto haveGpus = !gpuIdsToUse.empty();
1028 std::vector<GpuTask> gpuTasksOnThisRank;
1029 if (thisRankHasDuty(cr, DUTY_PP))
1031 if (useGpuForNonbonded)
1033 // Note that any bonded tasks on a GPU always accompany a
1037 gpuTasksOnThisRank.push_back(GpuTask::Nonbonded);
1039 else if (nonbondedTarget == TaskTarget::Gpu)
1041 gmx_fatal(FARGS, "Cannot run short-ranged nonbonded interactions on a GPU because there is none detected.");
1043 else if (bondedTarget == TaskTarget::Gpu)
1045 gmx_fatal(FARGS, "Cannot run bonded interactions on a GPU because there is none detected.");
1049 // TODO cr->duty & DUTY_PME should imply that a PME algorithm is active, but currently does not.
1050 if (EEL_PME(inputrec->coulombtype) && (thisRankHasDuty(cr, DUTY_PME)))
1056 gpuTasksOnThisRank.push_back(GpuTask::Pme);
1058 else if (pmeTarget == TaskTarget::Gpu)
1060 gmx_fatal(FARGS, "Cannot run PME on a GPU because there is none detected.");
1065 GpuTaskAssignment gpuTaskAssignment;
1068 // Produce the task assignment for this rank.
1069 gpuTaskAssignment = runTaskAssignment(gpuIdsToUse, userGpuTaskAssignment, *hwinfo,
1070 mdlog, cr, ms, physicalNodeComm, gpuTasksOnThisRank,
1071 useGpuForBonded, pmeRunMode);
1073 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
1075 /* Prevent other ranks from continuing after an issue was found
1076 * and reported as a fatal error.
1078 * TODO This function implements a barrier so that MPI runtimes
1079 * can organize an orderly shutdown if one of the ranks has had to
1080 * issue a fatal error in various code already run. When we have
1081 * MPI-aware error handling and reporting, this should be
1086 MPI_Barrier(cr->mpi_comm_mysim);
1092 MPI_Barrier(ms->mpi_comm_masters);
1094 /* We need another barrier to prevent non-master ranks from contiuing
1095 * when an error occured in a different simulation.
1097 MPI_Barrier(cr->mpi_comm_mysim);
1101 /* Now that we know the setup is consistent, check for efficiency */
1102 check_resource_division_efficiency(hwinfo, !gpuTaskAssignment.empty(), mdrunOptions.ntompOptionIsSet,
1105 gmx_device_info_t *nonbondedDeviceInfo = nullptr;
1107 if (thisRankHasDuty(cr, DUTY_PP))
1109 // This works because only one task of each type is currently permitted.
1110 auto nbGpuTaskMapping = std::find_if(gpuTaskAssignment.begin(), gpuTaskAssignment.end(),
1111 hasTaskType<GpuTask::Nonbonded>);
1112 if (nbGpuTaskMapping != gpuTaskAssignment.end())
1114 int nonbondedDeviceId = nbGpuTaskMapping->deviceId_;
1115 nonbondedDeviceInfo = getDeviceInfo(hwinfo->gpu_info, nonbondedDeviceId);
1116 init_gpu(nonbondedDeviceInfo);
1118 if (DOMAINDECOMP(cr))
1120 /* When we share GPUs over ranks, we need to know this for the DLB */
1121 dd_setup_dlb_resource_sharing(cr, nonbondedDeviceId);
1127 std::unique_ptr<ClfftInitializer> initializedClfftLibrary;
1129 gmx_device_info_t *pmeDeviceInfo = nullptr;
1130 // Later, this program could contain kernels that might be later
1131 // re-used as auto-tuning progresses, or subsequent simulations
1133 PmeGpuProgramStorage pmeGpuProgram;
1134 // This works because only one task of each type is currently permitted.
1135 auto pmeGpuTaskMapping = std::find_if(gpuTaskAssignment.begin(), gpuTaskAssignment.end(), hasTaskType<GpuTask::Pme>);
1136 const bool thisRankHasPmeGpuTask = (pmeGpuTaskMapping != gpuTaskAssignment.end());
1137 if (thisRankHasPmeGpuTask)
1139 pmeDeviceInfo = getDeviceInfo(hwinfo->gpu_info, pmeGpuTaskMapping->deviceId_);
1140 init_gpu(pmeDeviceInfo);
1141 pmeGpuProgram = buildPmeGpuProgram(pmeDeviceInfo);
1142 // TODO It would be nice to move this logic into the factory
1143 // function. See Redmine #2535.
1144 bool isMasterThread = !GMX_THREAD_MPI || MASTER(cr);
1145 if (pmeRunMode == PmeRunMode::GPU && !initializedClfftLibrary && isMasterThread)
1147 initializedClfftLibrary = initializeClfftLibrary();
1151 /* getting number of PP/PME threads
1152 PME: env variable should be read only on one node to make sure it is
1153 identical everywhere;
1155 nthreads_pme = gmx_omp_nthreads_get(emntPME);
1157 int numThreadsOnThisRank;
1158 /* threads on this MPI process or TMPI thread */
1159 if (thisRankHasDuty(cr, DUTY_PP))
1161 numThreadsOnThisRank = gmx_omp_nthreads_get(emntNonbonded);
1165 numThreadsOnThisRank = nthreads_pme;
1168 checkHardwareOversubscription(numThreadsOnThisRank, cr->nodeid,
1169 *hwinfo->hardwareTopology,
1170 physicalNodeComm, mdlog);
1172 if (hw_opt.thread_affinity != threadaffOFF)
1174 /* Before setting affinity, check whether the affinity has changed
1175 * - which indicates that probably the OpenMP library has changed it
1176 * since we first checked).
1178 gmx_check_thread_affinity_set(mdlog, cr,
1179 &hw_opt, hwinfo->nthreads_hw_avail, TRUE);
1181 int numThreadsOnThisNode, intraNodeThreadOffset;
1182 analyzeThreadsOnThisNode(physicalNodeComm, numThreadsOnThisRank, &numThreadsOnThisNode,
1183 &intraNodeThreadOffset);
1185 /* Set the CPU affinity */
1186 gmx_set_thread_affinity(mdlog, cr, &hw_opt, *hwinfo->hardwareTopology,
1187 numThreadsOnThisRank, numThreadsOnThisNode,
1188 intraNodeThreadOffset, nullptr);
1191 if (mdrunOptions.timingOptions.resetStep > -1)
1193 GMX_LOG(mdlog.info).asParagraph().
1194 appendText("The -resetstep functionality is deprecated, and may be removed in a future version.");
1196 wcycle = wallcycle_init(fplog, mdrunOptions.timingOptions.resetStep, cr);
1200 /* Master synchronizes its value of reset_counters with all nodes
1201 * including PME only nodes */
1202 reset_counters = wcycle_get_reset_counters(wcycle);
1203 gmx_bcast_sim(sizeof(reset_counters), &reset_counters, cr);
1204 wcycle_set_reset_counters(wcycle, reset_counters);
1207 // Membrane embedding must be initialized before we call init_forcerec()
1212 fprintf(stderr, "Initializing membed");
1214 /* Note that membed cannot work in parallel because mtop is
1215 * changed here. Fix this if we ever want to make it run with
1216 * multiple ranks. */
1217 membed = init_membed(fplog, filenames.size(), filenames.data(), &mtop, inputrec, globalState.get(), cr,
1219 .checkpointOptions.period);
1222 std::unique_ptr<MDAtoms> mdAtoms;
1223 std::unique_ptr<gmx_vsite_t> vsite;
1226 if (thisRankHasDuty(cr, DUTY_PP))
1228 /* Initiate forcerecord */
1230 fr->forceProviders = mdModules->initForceProviders();
1231 init_forcerec(fplog, mdlog, fr, fcd,
1232 inputrec, &mtop, cr, box,
1233 opt2fn("-table", filenames.size(), filenames.data()),
1234 opt2fn("-tablep", filenames.size(), filenames.data()),
1235 opt2fns("-tableb", filenames.size(), filenames.data()),
1236 *hwinfo, nonbondedDeviceInfo,
1241 /* Initialize the mdAtoms structure.
1242 * mdAtoms is not filled with atom data,
1243 * as this can not be done now with domain decomposition.
1245 mdAtoms = makeMDAtoms(fplog, mtop, *inputrec, thisRankHasPmeGpuTask);
1246 if (globalState && thisRankHasPmeGpuTask)
1248 // The pinning of coordinates in the global state object works, because we only use
1249 // PME on GPU without DD or on a separate PME rank, and because the local state pointer
1250 // points to the global state object without DD.
1251 // FIXME: MD and EM separately set up the local state - this should happen in the same function,
1252 // which should also perform the pinning.
1253 changePinningPolicy(&globalState->x, pme_get_pinning_policy());
1256 /* Initialize the virtual site communication */
1257 vsite = initVsite(mtop, cr);
1259 calc_shifts(box, fr->shift_vec);
1261 /* With periodic molecules the charge groups should be whole at start up
1262 * and the virtual sites should not be far from their proper positions.
1264 if (!inputrec->bContinuation && MASTER(cr) &&
1265 !(inputrec->ePBC != epbcNONE && inputrec->bPeriodicMols))
1267 /* Make molecules whole at start of run */
1268 if (fr->ePBC != epbcNONE)
1270 do_pbc_first_mtop(fplog, inputrec->ePBC, box, &mtop, globalState->x.rvec_array());
1274 /* Correct initial vsite positions are required
1275 * for the initial distribution in the domain decomposition
1276 * and for the initial shell prediction.
1278 constructVsitesGlobal(mtop, globalState->x);
1282 if (EEL_PME(fr->ic->eeltype) || EVDW_PME(fr->ic->vdwtype))
1284 ewaldcoeff_q = fr->ic->ewaldcoeff_q;
1285 ewaldcoeff_lj = fr->ic->ewaldcoeff_lj;
1290 /* This is a PME only node */
1292 GMX_ASSERT(globalState == nullptr, "We don't need the state on a PME only rank and expect it to be unitialized");
1294 ewaldcoeff_q = calc_ewaldcoeff_q(inputrec->rcoulomb, inputrec->ewald_rtol);
1295 ewaldcoeff_lj = calc_ewaldcoeff_lj(inputrec->rvdw, inputrec->ewald_rtol_lj);
1298 gmx_pme_t *sepPmeData = nullptr;
1299 // This reference hides the fact that PME data is owned by runner on PME-only ranks and by forcerec on other ranks
1300 GMX_ASSERT(thisRankHasDuty(cr, DUTY_PP) == (fr != nullptr), "Double-checking that only PME-only ranks have no forcerec");
1301 gmx_pme_t * &pmedata = fr ? fr->pmedata : sepPmeData;
1303 /* Initiate PME if necessary,
1304 * either on all nodes or on dedicated PME nodes only. */
1305 if (EEL_PME(inputrec->coulombtype) || EVDW_PME(inputrec->vdwtype))
1307 if (mdAtoms && mdAtoms->mdatoms())
1309 nChargePerturbed = mdAtoms->mdatoms()->nChargePerturbed;
1310 if (EVDW_PME(inputrec->vdwtype))
1312 nTypePerturbed = mdAtoms->mdatoms()->nTypePerturbed;
1315 if (cr->npmenodes > 0)
1317 /* The PME only nodes need to know nChargePerturbed(FEP on Q) and nTypePerturbed(FEP on LJ)*/
1318 gmx_bcast_sim(sizeof(nChargePerturbed), &nChargePerturbed, cr);
1319 gmx_bcast_sim(sizeof(nTypePerturbed), &nTypePerturbed, cr);
1322 if (thisRankHasDuty(cr, DUTY_PME))
1326 pmedata = gmx_pme_init(cr,
1327 getNumPmeDomains(cr->dd),
1329 mtop.natoms, nChargePerturbed != 0, nTypePerturbed != 0,
1330 mdrunOptions.reproducible,
1331 ewaldcoeff_q, ewaldcoeff_lj,
1333 pmeRunMode, nullptr,
1334 pmeDeviceInfo, pmeGpuProgram.get(), mdlog);
1336 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
1341 if (EI_DYNAMICS(inputrec->eI))
1343 /* Turn on signal handling on all nodes */
1345 * (A user signal from the PME nodes (if any)
1346 * is communicated to the PP nodes.
1348 signal_handler_install();
1351 if (thisRankHasDuty(cr, DUTY_PP))
1353 /* Assumes uniform use of the number of OpenMP threads */
1354 walltime_accounting = walltime_accounting_init(gmx_omp_nthreads_get(emntDefault));
1356 if (inputrec->bPull)
1358 /* Initialize pull code */
1359 inputrec->pull_work =
1360 init_pull(fplog, inputrec->pull, inputrec,
1361 &mtop, cr, &atomSets, inputrec->fepvals->init_lambda);
1362 if (inputrec->pull->bXOutAverage || inputrec->pull->bFOutAverage)
1364 initPullHistory(inputrec->pull_work, &observablesHistory);
1366 if (EI_DYNAMICS(inputrec->eI) && MASTER(cr))
1368 init_pull_output_files(inputrec->pull_work,
1369 filenames.size(), filenames.data(), oenv,
1370 continuationOptions);
1374 std::unique_ptr<EnforcedRotation> enforcedRotation;
1377 /* Initialize enforced rotation code */
1378 enforcedRotation = init_rot(fplog,
1390 if (inputrec->eSwapCoords != eswapNO)
1392 /* Initialize ion swapping code */
1393 init_swapcoords(fplog, inputrec, opt2fn_master("-swap", filenames.size(), filenames.data(), cr),
1394 &mtop, globalState.get(), &observablesHistory,
1395 cr, &atomSets, oenv, mdrunOptions);
1398 /* Let makeConstraints know whether we have essential dynamics constraints.
1399 * TODO: inputrec should tell us whether we use an algorithm, not a file option or the checkpoint
1401 bool doEssentialDynamics = (opt2fn_null("-ei", filenames.size(), filenames.data()) != nullptr
1402 || observablesHistory.edsamHistory);
1403 auto constr = makeConstraints(mtop, *inputrec, doEssentialDynamics,
1404 fplog, *mdAtoms->mdatoms(),
1405 cr, ms, nrnb, wcycle, fr->bMolPBC);
1407 if (DOMAINDECOMP(cr))
1409 GMX_RELEASE_ASSERT(fr, "fr was NULL while cr->duty was DUTY_PP");
1410 /* This call is not included in init_domain_decomposition mainly
1411 * because fr->cginfo_mb is set later.
1413 dd_init_bondeds(fplog, cr->dd, &mtop, vsite.get(), inputrec,
1414 domdecOptions.checkBondedInteractions,
1418 // TODO This is not the right place to manage the lifetime of
1419 // this data structure, but currently it's the easiest way to
1420 // make it work. Later, it should probably be made/updated
1421 // after the workload for the lifetime of a PP domain is
1423 PpForceWorkload ppForceWorkload;
1425 GMX_ASSERT(stopHandlerBuilder_, "Runner must provide StopHandlerBuilder to integrator.");
1426 /* Now do whatever the user wants us to do (how flexible...) */
1427 Integrator integrator {
1428 fplog, cr, ms, mdlog, static_cast<int>(filenames.size()), filenames.data(),
1431 vsite.get(), constr.get(),
1432 enforcedRotation ? enforcedRotation->getLegacyEnfrot() : nullptr,
1434 mdModules->outputProvider(),
1438 &observablesHistory,
1439 mdAtoms.get(), nrnb, wcycle, fr,
1443 walltime_accounting,
1444 std::move(stopHandlerBuilder_)
1446 integrator.run(inputrec->eI, doRerun);
1448 if (inputrec->bPull)
1450 finish_pull(inputrec->pull_work);
1456 GMX_RELEASE_ASSERT(pmedata, "pmedata was NULL while cr->duty was not DUTY_PP");
1458 walltime_accounting = walltime_accounting_init(gmx_omp_nthreads_get(emntPME));
1459 gmx_pmeonly(pmedata, cr, nrnb, wcycle, walltime_accounting, inputrec, pmeRunMode);
1462 wallcycle_stop(wcycle, ewcRUN);
1464 /* Finish up, write some stuff
1465 * if rerunMD, don't write last frame again
1467 finish_run(fplog, mdlog, cr,
1468 inputrec, nrnb, wcycle, walltime_accounting,
1469 fr ? fr->nbv : nullptr,
1471 EI_DYNAMICS(inputrec->eI) && !isMultiSim(ms));
1476 gmx_pme_destroy(pmedata);
1480 // FIXME: this is only here to manually unpin mdAtoms->chargeA_ and state->x,
1481 // before we destroy the GPU context(s) in free_gpu_resources().
1482 // Pinned buffers are associated with contexts in CUDA.
1483 // As soon as we destroy GPU contexts after mdrunner() exits, these lines should go.
1484 mdAtoms.reset(nullptr);
1485 globalState.reset(nullptr);
1486 mdModules.reset(nullptr); // destruct force providers here as they might also use the GPU
1488 /* Free GPU memory and set a physical node tMPI barrier (which should eventually go away) */
1489 free_gpu_resources(fr, physicalNodeComm);
1490 free_gpu(nonbondedDeviceInfo);
1491 free_gpu(pmeDeviceInfo);
1492 done_forcerec(fr, mtop.molblock.size(), mtop.groups.grps[egcENER].nr);
1497 free_membed(membed);
1500 gmx_hardware_info_free();
1502 /* Does what it says */
1503 print_date_and_time(fplog, cr->nodeid, "Finished mdrun", gmx_gettime());
1504 walltime_accounting_destroy(walltime_accounting);
1507 // Ensure log file content is written
1510 gmx_fio_flush(logFileHandle);
1513 /* Reset FPEs (important for unit tests) by disabling them. Assumes no
1514 * exceptions were enabled before function was called. */
1517 gmx_fedisableexcept();
1520 rc = static_cast<int>(gmx_get_stop_condition());
1523 /* we need to join all threads. The sub-threads join when they
1524 exit this function, but the master thread needs to be told to
1526 if (PAR(cr) && MASTER(cr))
1536 Mdrunner::~Mdrunner()
1538 // Clean up of the Manager.
1539 // This will end up getting called on every thread-MPI rank, which is unnecessary,
1540 // but okay as long as threads synchronize some time before adding or accessing
1541 // a new set of restraints.
1542 if (restraintManager_)
1544 restraintManager_->clear();
1545 GMX_ASSERT(restraintManager_->countRestraints() == 0,
1546 "restraints added during runner life time should be cleared at runner destruction.");
1550 void Mdrunner::addPotential(std::shared_ptr<gmx::IRestraintPotential> puller,
1553 GMX_ASSERT(restraintManager_, "Mdrunner must have a restraint manager.");
1554 // Not sure if this should be logged through the md logger or something else,
1555 // but it is helpful to have some sort of INFO level message sent somewhere.
1556 // std::cout << "Registering restraint named " << name << std::endl;
1558 // When multiple restraints are used, it may be wasteful to register them separately.
1559 // Maybe instead register an entire Restraint Manager as a force provider.
1560 restraintManager_->addToSpec(std::move(puller),
1564 Mdrunner::Mdrunner(Mdrunner &&) noexcept = default;
1566 //NOLINTNEXTLINE(performance-noexcept-move-constructor) working around GCC bug 58265
1567 Mdrunner &Mdrunner::operator=(Mdrunner && /*handle*/) noexcept(BUGFREE_NOEXCEPT_STRING) = default;
1569 class Mdrunner::BuilderImplementation
1572 BuilderImplementation() = delete;
1573 explicit BuilderImplementation(SimulationContext* context);
1574 ~BuilderImplementation();
1576 BuilderImplementation &setExtraMdrunOptions(const MdrunOptions &options,
1577 real forceWarningThreshold);
1579 void addDomdec(const DomdecOptions &options);
1581 void addVerletList(int nstlist);
1583 void addReplicaExchange(const ReplicaExchangeParameters ¶ms);
1585 void addMultiSim(gmx_multisim_t* multisim);
1587 void addNonBonded(const char* nbpu_opt);
1589 void addPME(const char* pme_opt_, const char* pme_fft_opt_);
1591 void addBondedTaskAssignment(const char* bonded_opt);
1593 void addHardwareOptions(const gmx_hw_opt_t &hardwareOptions);
1595 void addFilenames(ArrayRef <const t_filenm> filenames);
1597 void addOutputEnvironment(gmx_output_env_t* outputEnvironment);
1599 void addLogFile(t_fileio *logFileHandle);
1601 void addStopHandlerBuilder(std::unique_ptr<StopHandlerBuilder> builder);
1606 // Default parameters copied from runner.h
1607 // \todo Clarify source(s) of default parameters.
1609 const char* nbpu_opt_ = nullptr;
1610 const char* pme_opt_ = nullptr;
1611 const char* pme_fft_opt_ = nullptr;
1612 const char *bonded_opt_ = nullptr;
1614 MdrunOptions mdrunOptions_;
1616 DomdecOptions domdecOptions_;
1618 ReplicaExchangeParameters replicaExchangeParameters_;
1620 //! Command-line override for the duration of a neighbor list with the Verlet scheme.
1623 //! Non-owning multisim communicator handle.
1624 std::unique_ptr<gmx_multisim_t*> multisim_ = nullptr;
1626 //! Print a warning if any force is larger than this (in kJ/mol nm).
1627 real forceWarningThreshold_ = -1;
1629 /*! \brief Non-owning pointer to SimulationContext (owned and managed by client)
1632 * \todo Establish robust protocol to make sure resources remain valid.
1633 * SimulationContext will likely be separated into multiple layers for
1634 * different levels of access and different phases of execution. Ref
1635 * https://redmine.gromacs.org/issues/2375
1636 * https://redmine.gromacs.org/issues/2587
1638 SimulationContext* context_ = nullptr;
1640 //! \brief Parallelism information.
1641 gmx_hw_opt_t hardwareOptions_;
1643 //! filename options for simulation.
1644 ArrayRef<const t_filenm> filenames_;
1646 /*! \brief Handle to output environment.
1648 * \todo gmx_output_env_t needs lifetime management.
1650 gmx_output_env_t* outputEnvironment_ = nullptr;
1652 /*! \brief Non-owning handle to MD log file.
1654 * \todo Context should own output facilities for client.
1655 * \todo Improve log file handle management.
1657 * Code managing the FILE* relies on the ability to set it to
1658 * nullptr to check whether the filehandle is valid.
1660 t_fileio* logFileHandle_ = nullptr;
1663 * \brief Builder for simulation stop signal handler.
1665 std::unique_ptr<StopHandlerBuilder> stopHandlerBuilder_ = nullptr;
1668 Mdrunner::BuilderImplementation::BuilderImplementation(SimulationContext* context) :
1671 GMX_ASSERT(context_, "Bug found. It should not be possible to construct builder without a valid context.");
1674 Mdrunner::BuilderImplementation::~BuilderImplementation() = default;
1676 Mdrunner::BuilderImplementation &
1677 Mdrunner::BuilderImplementation::setExtraMdrunOptions(const MdrunOptions &options,
1678 real forceWarningThreshold)
1680 mdrunOptions_ = options;
1681 forceWarningThreshold_ = forceWarningThreshold;
1685 void Mdrunner::BuilderImplementation::addDomdec(const DomdecOptions &options)
1687 domdecOptions_ = options;
1690 void Mdrunner::BuilderImplementation::addVerletList(int nstlist)
1695 void Mdrunner::BuilderImplementation::addReplicaExchange(const ReplicaExchangeParameters ¶ms)
1697 replicaExchangeParameters_ = params;
1700 void Mdrunner::BuilderImplementation::addMultiSim(gmx_multisim_t* multisim)
1702 multisim_ = compat::make_unique<gmx_multisim_t*>(multisim);
1705 Mdrunner Mdrunner::BuilderImplementation::build()
1707 auto newRunner = Mdrunner();
1709 GMX_ASSERT(context_, "Bug found. It should not be possible to call build() without a valid context.");
1711 newRunner.mdrunOptions = mdrunOptions_;
1712 newRunner.domdecOptions = domdecOptions_;
1714 // \todo determine an invariant to check or confirm that all gmx_hw_opt_t objects are valid
1715 newRunner.hw_opt = hardwareOptions_;
1717 // No invariant to check. This parameter exists to optionally override other behavior.
1718 newRunner.nstlist_cmdline = nstlist_;
1720 newRunner.replExParams = replicaExchangeParameters_;
1722 newRunner.filenames = filenames_;
1724 GMX_ASSERT(context_->communicationRecord_, "SimulationContext communications not initialized.");
1725 newRunner.cr = context_->communicationRecord_;
1729 // nullptr is a valid value for the multisim handle, so we don't check the pointed-to pointer.
1730 newRunner.ms = *multisim_;
1734 GMX_THROW(gmx::APIError("MdrunnerBuilder::addMultiSim() is required before build()"));
1737 // \todo Clarify ownership and lifetime management for gmx_output_env_t
1738 // \todo Update sanity checking when output environment has clearly specified invariants.
1739 // Initialization and default values for oenv are not well specified in the current version.
1740 if (outputEnvironment_)
1742 newRunner.oenv = outputEnvironment_;
1746 GMX_THROW(gmx::APIError("MdrunnerBuilder::addOutputEnvironment() is required before build()"));
1749 newRunner.logFileHandle = logFileHandle_;
1753 newRunner.nbpu_opt = nbpu_opt_;
1757 GMX_THROW(gmx::APIError("MdrunnerBuilder::addNonBonded() is required before build()"));
1760 if (pme_opt_ && pme_fft_opt_)
1762 newRunner.pme_opt = pme_opt_;
1763 newRunner.pme_fft_opt = pme_fft_opt_;
1767 GMX_THROW(gmx::APIError("MdrunnerBuilder::addElectrostatics() is required before build()"));
1772 newRunner.bonded_opt = bonded_opt_;
1776 GMX_THROW(gmx::APIError("MdrunnerBuilder::addBondedTaskAssignment() is required before build()"));
1779 newRunner.restraintManager_ = compat::make_unique<gmx::RestraintManager>();
1781 if (stopHandlerBuilder_)
1783 newRunner.stopHandlerBuilder_ = std::move(stopHandlerBuilder_);
1787 newRunner.stopHandlerBuilder_ = compat::make_unique<StopHandlerBuilder>();
1793 void Mdrunner::BuilderImplementation::addNonBonded(const char* nbpu_opt)
1795 nbpu_opt_ = nbpu_opt;
1798 void Mdrunner::BuilderImplementation::addPME(const char* pme_opt,
1799 const char* pme_fft_opt)
1802 pme_fft_opt_ = pme_fft_opt;
1805 void Mdrunner::BuilderImplementation::addBondedTaskAssignment(const char* bonded_opt)
1807 bonded_opt_ = bonded_opt;
1810 void Mdrunner::BuilderImplementation::addHardwareOptions(const gmx_hw_opt_t &hardwareOptions)
1812 hardwareOptions_ = hardwareOptions;
1815 void Mdrunner::BuilderImplementation::addFilenames(ArrayRef<const t_filenm> filenames)
1817 filenames_ = filenames;
1820 void Mdrunner::BuilderImplementation::addOutputEnvironment(gmx_output_env_t* outputEnvironment)
1822 outputEnvironment_ = outputEnvironment;
1825 void Mdrunner::BuilderImplementation::addLogFile(t_fileio *logFileHandle)
1827 logFileHandle_ = logFileHandle;
1830 void Mdrunner::BuilderImplementation::addStopHandlerBuilder(std::unique_ptr<StopHandlerBuilder> builder)
1832 stopHandlerBuilder_ = std::move(builder);
1835 MdrunnerBuilder::MdrunnerBuilder(compat::not_null<SimulationContext*> context) :
1836 impl_ {gmx::compat::make_unique<Mdrunner::BuilderImplementation>(context)}
1840 MdrunnerBuilder::~MdrunnerBuilder() = default;
1842 MdrunnerBuilder &MdrunnerBuilder::addSimulationMethod(const MdrunOptions &options,
1843 real forceWarningThreshold)
1845 impl_->setExtraMdrunOptions(options, forceWarningThreshold);
1849 MdrunnerBuilder &MdrunnerBuilder::addDomainDecomposition(const DomdecOptions &options)
1851 impl_->addDomdec(options);
1855 MdrunnerBuilder &MdrunnerBuilder::addNeighborList(int nstlist)
1857 impl_->addVerletList(nstlist);
1861 MdrunnerBuilder &MdrunnerBuilder::addReplicaExchange(const ReplicaExchangeParameters ¶ms)
1863 impl_->addReplicaExchange(params);
1867 MdrunnerBuilder &MdrunnerBuilder::addMultiSim(gmx_multisim_t* multisim)
1869 impl_->addMultiSim(multisim);
1873 MdrunnerBuilder &MdrunnerBuilder::addNonBonded(const char* nbpu_opt)
1875 impl_->addNonBonded(nbpu_opt);
1879 MdrunnerBuilder &MdrunnerBuilder::addElectrostatics(const char* pme_opt,
1880 const char* pme_fft_opt)
1882 // The builder method may become more general in the future, but in this version,
1883 // parameters for PME electrostatics are both required and the only parameters
1885 if (pme_opt && pme_fft_opt)
1887 impl_->addPME(pme_opt, pme_fft_opt);
1891 GMX_THROW(gmx::InvalidInputError("addElectrostatics() arguments must be non-null pointers."));
1896 MdrunnerBuilder &MdrunnerBuilder::addBondedTaskAssignment(const char* bonded_opt)
1898 impl_->addBondedTaskAssignment(bonded_opt);
1902 Mdrunner MdrunnerBuilder::build()
1904 return impl_->build();
1907 MdrunnerBuilder &MdrunnerBuilder::addHardwareOptions(const gmx_hw_opt_t &hardwareOptions)
1909 impl_->addHardwareOptions(hardwareOptions);
1913 MdrunnerBuilder &MdrunnerBuilder::addFilenames(ArrayRef<const t_filenm> filenames)
1915 impl_->addFilenames(filenames);
1919 MdrunnerBuilder &MdrunnerBuilder::addOutputEnvironment(gmx_output_env_t* outputEnvironment)
1921 impl_->addOutputEnvironment(outputEnvironment);
1925 MdrunnerBuilder &MdrunnerBuilder::addLogFile(t_fileio *logFileHandle)
1927 impl_->addLogFile(logFileHandle);
1931 MdrunnerBuilder &MdrunnerBuilder::addStopHandlerBuilder(std::unique_ptr<StopHandlerBuilder> builder)
1933 impl_->addStopHandlerBuilder(std::move(builder));
1937 MdrunnerBuilder::MdrunnerBuilder(MdrunnerBuilder &&) noexcept = default;
1939 MdrunnerBuilder &MdrunnerBuilder::operator=(MdrunnerBuilder &&) noexcept = default;