Exemple #1
0
void
ServiceMgr::establish_server()
{
  create_atoms();

  // Operations in this routine must be atomic to avoid race conditions,
  // hence the server grab.

  XGrabServer (window_system().display());

  Window current_server =
    XGetSelectionOwner (window_system().display(), _XA_OLIAS_WINDOW_ID);

  ON_DEBUG(printf ("Current OLIAS server is window 0x%lx\n", current_server));

  // If no current server, we'll become the server.
  if (current_server == None)
    {
      ON_DEBUG(printf ("Attempting to become OLIAS server..."));
      ON_DEBUG(fflush (stdout));
      current_server = XtWindow (window_system().toplevel());

      // OK to use CurrentTime because there is no chance of contention.
      XSetSelectionOwner (window_system().display(), _XA_OLIAS_WINDOW_ID,
			  current_server, CurrentTime);

      // Make sure it worked.
      current_server = XGetSelectionOwner (window_system().display(),
					   _XA_OLIAS_WINDOW_ID);

      if (current_server == XtWindow (window_system().toplevel()))
	{
	  client_event_manager().register_handler(this, window_system().toplevel());
	  ON_DEBUG(puts ("successful!"));
	}
      else
	{
	  ON_DEBUG(puts ("failed!"));
	}
    }

  XUngrabServer (window_system().display());
}
Exemple #2
0
KWindowSystemPrivate::KWindowSystemPrivate(int _what)
    : QWidget(0),
      NETRootInfo( QX11Info::display(),
                   _what >= KWindowSystem::INFO_WINDOWS ? windows_properties : desktop_properties,
                   2, -1, false ),
      strutSignalConnected( false ),
      haveXfixes( false ),
      what( _what )
{
    KSystemEventFilter::installEventFilter(this);
    (void ) qApp->desktop(); //trigger desktop widget creation to select root window events

#ifdef HAVE_XFIXES
    int errorBase;
    if ((haveXfixes = XFixesQueryExtension(QX11Info::display(), &xfixesEventBase, &errorBase))) {
        create_atoms();
        XFixesSelectSelectionInput(QX11Info::display(), winId(), net_wm_cm,
                                   XFixesSetSelectionOwnerNotifyMask |
                                   XFixesSelectionWindowDestroyNotifyMask |
                                   XFixesSelectionClientCloseNotifyMask);
        compositingEnabled = XGetSelectionOwner(QX11Info::display(), net_wm_cm) != None;
    }
#endif
}
Exemple #3
0
int main(int argc, char **argv)
{
  //Common miniMD settings
  In in;
  in.datafile = NULL;
  int me=0;                     //local MPI rank
  int nprocs=1;                 //number of MPI ranks
  int num_threads=32;		    //number of Threads per Block threads
  int num_steps=-1;             //number of timesteps (if -1 use value from lj.in)
  int system_size=-1;           //size of the system (if -1 use value from lj.in)
  int check_safeexchange=0;     //if 1 complain if atom moves further than 1 subdomain length between exchanges
  int do_safeexchange=0;        //if 1 use safe exchange mode [allows exchange over multiple subdomains]
  int use_sse=0;                //setting for SSE variant of miniMD only
  int screen_yaml=0;            //print yaml output to screen also
  int yaml_output=0;            //print yaml output
  int halfneigh=0;              //1: use half neighborlist; 0: use full neighborlist; -1: use original miniMD version half neighborlist force
  char* input_file = NULL;
  int ghost_newton = 0;
  int skip_gpu = 999;
  int neighbor_size = -1;

  //OpenCL specific
  int platform = 0;
  int device = 0;
  int subdevice = -1;
  int ppn = 2;
  int use_tex = 0;
  int threads_per_atom = 1;
  int map_device=0;

  for(int i = 0; i < argc; i++) {
    if((strcmp(argv[i], "-i") == 0) || (strcmp(argv[i], "--input_file") == 0)) {
      input_file = argv[++i];
      continue;
    }
    if((strcmp(argv[i],"-p")==0)||(strcmp(argv[i],"--platform")==0)) {platform=atoi(argv[++i]); continue;}
    if((strcmp(argv[i],"-d")==0)||(strcmp(argv[i],"--device")==0)) {device=atoi(argv[++i]); continue;}
	if((strcmp(argv[i],"-sd")==0)||(strcmp(argv[i],"--subdevice")==0)) {subdevice=atoi(argv[++i]); continue;}
	if((strcmp(argv[i],"-sd_map")==0)||(strcmp(argv[i],"--subdevice_mapping")==0)) {subdevice=1-me%ppn; continue;}
	if((strcmp(argv[i],"-ng")==0)||(strcmp(argv[i],"--num_gpus")==0)) {ppn=atoi(argv[++i]); continue;}
	if((strcmp(argv[i],"-dm")==0)||(strcmp(argv[i],"--device_map")==0)) {map_device=1; continue;}
  }

  MPI_Init(&argc, &argv);
  MPI_Comm_rank(MPI_COMM_WORLD, &me);
  MPI_Comm_size(MPI_COMM_WORLD, &nprocs);

  if(map_device) {device = me%ppn; if(device>=skip_gpu) device++;}

  OpenCLWrapper* opencl = new OpenCLWrapper;
  if( me == 0)
  printf("# Platforms: %i\n",opencl->num_platforms);
  printf("# Proc: %i using device %i\n",me,device);
  opencl->Init(argc,argv,device,device+1,NULL,platform,subdevice);

  int error = 0;
  if(input_file == NULL)
    error = input(in, "in.lj.miniMD");
  else
	error = input(in, input_file);

  if (error)
  {
	  MPI_Finalize();
	  exit(0);
  }

  for(int i=0;i<argc;i++)
  {
     if((strcmp(argv[i],"-t")==0)||(strcmp(argv[i],"--num_threads")==0)) {num_threads=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"-n")==0)||(strcmp(argv[i],"--nsteps")==0))  {num_steps=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"-s")==0)||(strcmp(argv[i],"--size")==0))  {system_size=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"--half_neigh")==0))  {halfneigh=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"-sse")==0))  {use_sse=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"--check_exchange")==0))  {check_safeexchange=1; continue;}
     if((strcmp(argv[i],"-o")==0)||(strcmp(argv[i],"--yaml_output")==0))  {yaml_output=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"--yaml_screen")==0))  {screen_yaml=1; continue;}
     if((strcmp(argv[i], "-f") == 0) || (strcmp(argv[i], "--data_file") == 0)) {
       if(in.datafile == NULL) in.datafile = new char[1000];

       strcpy(in.datafile, argv[++i]);
       continue;
     }
     if((strcmp(argv[i], "-u") == 0) || (strcmp(argv[i], "--units") == 0)) {
       in.units = strcmp(argv[++i], "metal") == 0 ? 1 : 0;
       continue;
     }

     if((strcmp(argv[i], "-p") == 0) || (strcmp(argv[i], "--force") == 0)) {
       in.forcetype = strcmp(argv[++i], "eam") == 0 ? FORCEEAM : FORCELJ;
       continue;
     }
     if((strcmp(argv[i], "-gn") == 0) || (strcmp(argv[i], "--ghost_newton") == 0)) {
       ghost_newton = atoi(argv[++i]);
       continue;
     }
     if((strcmp(argv[i], "--skip_gpu") == 0)) {
       skip_gpu = atoi(argv[++i]);
       continue;
     }
     if((strcmp(argv[i], "-b") == 0) || (strcmp(argv[i], "--neigh_bins") == 0))  {
       neighbor_size = atoi(argv[++i]);
       continue;
     }
	 if((strcmp(argv[i],"-tex")==0)||(strcmp(argv[i],"--texture")==0)) {use_tex=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"-tpa")==0)) {threads_per_atom=atoi(argv[++i]); continue;}
     if((strcmp(argv[i],"-h")==0)||(strcmp(argv[i],"--help")==0))
     {
        printf("\n---------------------------------------------------------\n");
        printf("-------------" VARIANT_STRING "------------\n");
        printf("---------------------------------------------------------\n\n");

        printf("miniMD is a simple, parallel molecular dynamics (MD) code,\n"
               "which is part of the Mantevo project at Sandia National\n"
   	           "Laboratories ( http://www.mantevo.org ).\n"
	           "The original authors of MPI based miniMD are Steve Plimpton ([email protected]) ,\n"
               "Paul Crozier ([email protected]) with current versions \n"
               "written by Christian Trott ([email protected]).\n\n");
        printf("Commandline Options:\n");
        printf("\n  Execution configuration:\n");
        printf("\t-t / --num_threads <threads>: set number of threads per block (default 32)\n");
        printf("\t--half_neigh <int>:           use half neighborlists (default 0)\n"
               "\t                                0: full neighborlist\n"
               "\t                                1: half neighborlist (not supported in OpenCL variant)\n"
               "\t                               -1: original miniMD half neighborlist force \n"
               "\t                                   (not supported in OpenCL variant)\n");
        printf("\t-d / --device <int>:          select device (default 0)\n");
        printf("\t-dm / --device_map:           map devices to MPI ranks\n");
        printf("\t-ng / --num_gpus <int>:       give number of GPUs per Node (used in conjuction with -dm\n"
        	   "\t                              to determine device id: 'id=mpi_rank%%ng' (default 2)\n");
        printf("\t--skip_gpu <int>:             skip the specified gpu when assigning devices to MPI ranks\n"
        	   "\t                              used in conjunction with -dm (but must come first in arg list)\n");
        printf("\t-p / --platform <int>:        select platform (default 0)\n");
        printf("\t-sse <sse_version>:           use explicit sse intrinsics (use miniMD-SSE variant)\n");
        printf("\t-gn / --ghost_newton <int>:   set usage of newtons third law for ghost atoms\n"
               "\t                              (only applicable with half neighborlists)\n");
        printf("\n  Simulation setup:\n");
        printf("\t-i / --input_file <string>:   set input file to be used (default: in.lj.miniMD)\n");
        printf("\t-n / --nsteps <nsteps>:       set number of timesteps for simulation\n");
        printf("\t-s / --size <size>:           set linear dimension of systembox and neighbor bins\n");
        printf("\t-b / --neigh_bins <int>:      set linear dimension of neighbor bin grid\n");
        printf("\t-u / --units <string>:        set units (lj or metal), see LAMMPS documentation\n");
        printf("\t-p / --force <string>:        set interaction model (lj or eam)\n");
        printf("\t-f / --data_file <string>:    read configuration from LAMMPS data file\n");

        printf("\n  Miscelaneous:\n");
        printf("\t--check_exchange:             check whether atoms moved further than subdomain width\n");
        printf("\t--safe_exchange:              perform exchange communication with all MPI processes\n"
	           "\t                              within rcut_neighbor (outer force cutoff)\n");
        printf("\t--yaml_output <int>:          level of yaml output (default 0)\n");
        printf("\t--yaml_screen:                write yaml output also to screen\n");
        printf("\t-tex / --texture <int>:       use texture cache in force kernel (default 0)\n");
        printf("\t-h / --help:                  display this help message\n\n");
        printf("---------------------------------------------------------\n\n");

        exit(0);
     }
  }

  Atom atom;
  Force force;
  Neighbor neighbor;
  Integrate integrate;
  Thermo thermo;
  Comm comm;
  Timer timer;
  ThreadData threads;

  if(in.forcetype == FORCEEAM) {
	  printf("ERROR: " VARIANT_STRING " does not yet support EAM simulations. Exiting.\n");
	  MPI_Finalize();
	  exit(0);
  }
  if(ghost_newton!=0)
  {
    if(me ==0 ) printf("ERROR: -ghost_newton %i is not supported in " VARIANT_STRING ". Exiting.\n",ghost_newton);
    MPI_Finalize();
    exit(0);
  }
  if(halfneigh!=0)
  {
    if(me ==0 ) printf("ERROR: -half_neigh %i is not supported in " VARIANT_STRING ". Exiting.\n",halfneigh);
    MPI_Finalize();
    exit(0);
  }
  if(halfneigh!=0)
  {
    if(me ==0 ) printf("ERROR: -half_neigh %i is not supported in " VARIANT_STRING ". Exiting.\n",halfneigh);
    MPI_Finalize();
    exit(0);
  }
  if(use_tex!=0)
  {
    if(me ==0 ) printf("ERROR: -tex %i is currently broken. Exiting.\n",use_tex);
    MPI_Finalize();
    exit(0);
  }
  if(use_sse)
  {
    #ifndef VARIANT_SSE
    if(me ==0 ) printf("ERROR: Trying to run with -sse with miniMD reference version. Use SSE variant instead. Exiting.\n");
    MPI_Finalize();
    exit(0);
    #endif
  }

  threads.mpi_me=me;
  threads.mpi_num_threads=nprocs;
  threads.omp_me=0;
  threads.omp_num_threads=num_threads;
  


  atom.threads = &threads;
  comm.threads = &threads;
  force.threads = &threads;
  integrate.threads = &threads;
  neighbor.threads = &threads;
  thermo.threads = &threads;


  opencl->blockdim = num_threads;
  atom.threads_per_atom = threads_per_atom;
  atom.use_tex = use_tex;

  comm.do_safeexchange=do_safeexchange;
  force.use_sse=use_sse;
  neighbor.halfneigh=halfneigh;


  compile_kernels(opencl);

  integrate.opencl = opencl;
  force.opencl = opencl;
  neighbor.opencl = opencl;
  atom.opencl = opencl;
  comm.opencl = opencl;

  if(num_steps > 0) in.ntimes = num_steps;

  if(system_size > 0) {
    in.nx = system_size;
    in.ny = system_size;
    in.nz = system_size;
  }

  if(neighbor_size > 0) {
    neighbor.nbinx = neighbor_size;
    neighbor.nbiny = neighbor_size;
    neighbor.nbinz = neighbor_size;
  }

  if(neighbor_size < 0 && in.datafile == NULL) {
    MMD_float neighscale = 5.0 / 6.0;
    neighbor.nbinx = neighscale * in.nx;
    neighbor.nbiny = neighscale * in.ny;
    neighbor.nbinz = neighscale * in.ny;
  }

  if(neighbor_size < 0 && in.datafile)
    neighbor.nbinx = -1;

  if(neighbor.nbinx == 0) neighbor.nbinx = 1;

  if(neighbor.nbiny == 0) neighbor.nbiny = 1;

  if(neighbor.nbinz == 0) neighbor.nbinz = 1;

  integrate.ntimes = in.ntimes;
  integrate.dt = in.dt;
  neighbor.every = in.neigh_every;
  neighbor.cutneigh = in.neigh_cut;
  force.cutforce = in.force_cut;
  thermo.nstat = in.thermo_nstat;


  if(me == 0)
    printf("# Create System:\n");

  if(in.datafile) {
    read_lammps_data(atom, comm, neighbor, integrate, thermo, in.datafile, in.units);
    MMD_float volume = atom.box.xprd * atom.box.yprd * atom.box.zprd;
    in.rho = 1.0 * atom.natoms / volume;
    force.setup();

  } else {
    create_box(atom, in.nx, in.ny, in.nz, in.rho);

    comm.setup(neighbor.cutneigh, atom);

    neighbor.setup(atom);

    integrate.setup();

    force.setup();


    create_atoms(atom, in.nx, in.ny, in.nz, in.rho);
    thermo.setup(in.rho, integrate, atom, in.units);

    create_velocity(in.t_request, atom, thermo);

  }

  if(me == 0)
    printf("# Done .... \n");

  if(me == 0) {
    fprintf(stdout, "# " VARIANT_STRING " output ...\n");
    fprintf(stdout, "# Systemparameters: \n");
    fprintf(stdout, "\t# MPI processes: %i\n", neighbor.threads->mpi_num_threads);
    fprintf(stdout, "\t# OpenMP threads: %i\n", neighbor.threads->omp_num_threads);
    fprintf(stdout, "\t# Inputfile: %s\n", input_file == 0 ? "in.lj.miniMD" : input_file);
    fprintf(stdout, "\t# Datafile: %s\n", in.datafile ? in.datafile : "None");
    fprintf(stdout, "\t# ForceStyle: %s\n", in.forcetype == FORCELJ ? "LJ" : "EAM");
    fprintf(stdout, "\t# Units: %s\n", in.units == 0 ? "LJ" : "METAL");
    fprintf(stdout, "\t# Atoms: %i\n", atom.natoms);
    fprintf(stdout, "\t# System size: %2.2lf %2.2lf %2.2lf (unit cells: %i %i %i)\n", atom.box.xprd, atom.box.yprd, atom.box.zprd, in.nx, in.ny, in.nz);
    fprintf(stdout, "\t# Density: %lf\n", in.rho);
    fprintf(stdout, "\t# Force cutoff: %lf\n", force.cutforce);
    fprintf(stdout, "\t# Neigh cutoff: %lf\n", neighbor.cutneigh);
    fprintf(stdout, "\t# Half neighborlists: %i\n", neighbor.halfneigh);
    fprintf(stdout, "\t# Neighbor bins: %i %i %i\n", neighbor.nbinx, neighbor.nbiny, neighbor.nbinz);
    fprintf(stdout, "\t# Neighbor frequency: %i\n", neighbor.every);
    fprintf(stdout, "\t# Timestep size: %lf\n", integrate.dt);
    fprintf(stdout, "\t# Thermo frequency: %i\n", thermo.nstat);
    fprintf(stdout, "\t# Ghost Newton: %i\n", ghost_newton);
    fprintf(stdout, "\t# Use SSE intrinsics: %i\n", force.use_sse);
    fprintf(stdout, "\t# Do safe exchange: %i\n", comm.do_safeexchange);
    fprintf(stdout, "\t# Size of float: %i\n\n",sizeof(MMD_float));
  }

  comm.exchange(atom);
  comm.borders(atom);

  atom.d_x->upload();
  atom.d_v->upload();
  //atom.d_vold->upload();
  neighbor.build(atom);

  if (me == 0) printf("# Starting dynamics ...\n");
  if (me == 0) printf("# Timestep T U P Time\n");
  thermo.compute(0,atom,neighbor,force,timer,comm);
  force.compute(atom,neighbor,comm.me);
  timer.barrier_start(TIME_TOTAL);
  integrate.run(atom,force,neighbor,comm,thermo,timer);
  timer.barrier_stop(TIME_TOTAL);

  int natoms;
  MPI_Allreduce(&atom.nlocal,&natoms,1,MPI_INT,MPI_SUM,MPI_COMM_WORLD);
  thermo.compute(-1,atom,neighbor,force,timer,comm);

  if(me == 0) {
    double time_other=timer.array[TIME_TOTAL]-timer.array[TIME_FORCE]-timer.array[TIME_NEIGH]-timer.array[TIME_COMM];
    printf("\n\n");
    printf("# Performance Summary:\n");
    printf("# MPI_proc OMP_threads nsteps natoms t_total t_force t_neigh t_comm t_other performance perf/thread grep_string t_extra\n");
    printf("%i %i %i %i %lf %lf %lf %lf %lf %lf %lf PERF_SUMMARY %lf\n\n\n",
       nprocs,num_threads,integrate.ntimes,natoms,
       timer.array[TIME_TOTAL],timer.array[TIME_FORCE],timer.array[TIME_NEIGH],timer.array[TIME_COMM],time_other,
       1.0*natoms*integrate.ntimes/timer.array[TIME_TOTAL],1.0*natoms*integrate.ntimes/timer.array[TIME_TOTAL]/nprocs/num_threads,timer.array[TIME_TEST]);

  }

  if(yaml_output)
  output(in,atom,force,neighbor,comm,thermo,integrate,timer,screen_yaml);

  MPI_Barrier(MPI_COMM_WORLD);
  MPI_Finalize();
  delete opencl;
  return 0;
}
Exemple #4
0
int main(int argc, char** argv)
{
  In in;
  in.datafile = NULL;
  int me = 0;                   //local MPI rank
  int nprocs = 1;               //number of MPI ranks
  int num_threads = 1;		//number of OpenMP threads
  int num_steps = -1;           //number of timesteps (if -1 use value from lj.in)
  int system_size = -1;         //size of the system (if -1 use value from lj.in)
  int nx = -1;
  int ny = -1;
  int nz = -1;
  int check_safeexchange = 0;   //if 1 complain if atom moves further than 1 subdomain length between exchanges
  int do_safeexchange = 0;      //if 1 use safe exchange mode [allows exchange over multiple subdomains]
  int use_sse = 0;              //setting for SSE variant of miniMD only
  int screen_yaml = 0;          //print yaml output to screen also
  int yaml_output = 0;          //print yaml output
  int halfneigh = 1;            //1: use half neighborlist; 0: use full neighborlist; -1: use original miniMD version half neighborlist force
  int teams = 1;
  int device = 0;
  int neighbor_size = -1;
  char* input_file = NULL;
  int ghost_newton = 1;
  int sort = -1;

  for(int i = 0; i < argc; i++) {
    if((strcmp(argv[i], "-i") == 0) || (strcmp(argv[i], "--input_file") == 0)) {
      input_file = argv[++i];
      continue;
    }
  }

  MPI_Init(&argc, &argv);
  MPI_Comm_rank(MPI_COMM_WORLD, &me);
  MPI_Comm_size(MPI_COMM_WORLD, &nprocs);

  int error = 0;

  if(input_file == NULL)
    error = input(in, "in.lj.miniMD");
  else
    error = input(in, input_file);

  if(error) {
    MPI_Finalize();
    exit(0);
  }

  for(int i = 0; i < argc; i++) {
    if((strcmp(argv[i], "-t") == 0) || (strcmp(argv[i], "--num_threads") == 0)) {
      num_threads = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "--teams") == 0)) {
      teams = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-n") == 0) || (strcmp(argv[i], "--nsteps") == 0))  {
      num_steps = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-s") == 0) || (strcmp(argv[i], "--size") == 0)) {
      system_size = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-nx") == 0)) {
      nx = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-ny") == 0)) {
      ny = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-nz") == 0)) {
      nz = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-b") == 0) || (strcmp(argv[i], "--neigh_bins") == 0))  {
      neighbor_size = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "--half_neigh") == 0))  {
      halfneigh = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-sse") == 0))  {
      use_sse = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "--check_exchange") == 0))  {
      check_safeexchange = 1;
      continue;
    }

    if((strcmp(argv[i], "--sort") == 0))  {
      sort = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-o") == 0) || (strcmp(argv[i], "--yaml_output") == 0))  {
      yaml_output = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "--yaml_screen") == 0))  {
      screen_yaml = 1;
      continue;
    }

    if((strcmp(argv[i], "-f") == 0) || (strcmp(argv[i], "--data_file") == 0)) {
      if(in.datafile == NULL) in.datafile = new char[1000];

      strcpy(in.datafile, argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-u") == 0) || (strcmp(argv[i], "--units") == 0)) {
      in.units = strcmp(argv[++i], "metal") == 0 ? 1 : 0;
      continue;
    }

    if((strcmp(argv[i], "-p") == 0) || (strcmp(argv[i], "--force") == 0)) {
      in.forcetype = strcmp(argv[++i], "eam") == 0 ? FORCEEAM : FORCELJ;
      continue;
    }

    if((strcmp(argv[i], "-gn") == 0) || (strcmp(argv[i], "--ghost_newton") == 0)) {
      ghost_newton = atoi(argv[++i]);
      continue;
    }

    if((strcmp(argv[i], "-h") == 0) || (strcmp(argv[i], "--help") == 0)) {
      printf("\n-----------------------------------------------------------------------------------------------------------\n");
      printf("-------------" VARIANT_STRING "--------------------\n");
      printf("-------------------------------------------------------------------------------------------------------------\n\n");

      printf("miniMD is a simple, parallel molecular dynamics (MD) code,\n"
             "which is part of the Mantevo project at Sandia National\n"
             "Laboratories ( http://www.mantevo.org ).\n"
             "The original authors of miniMD are Steve Plimpton ([email protected]) ,\n"
             "Paul Crozier ([email protected]) with current\n"
             "versions written by Christian Trott ([email protected]).\n\n");
      printf("Commandline Options:\n");
      printf("\n  Execution configuration:\n");
      printf("\t--teams <nteams>:             set number of thread-teams used per MPI rank (default 1)\n");
      printf("\t-t / --num_threads <threads>: set number of threads per thread-team (default 1)\n");
      printf("\t--half_neigh <int>:           use half neighborlists (default 1)\n"
             "\t                                0: full neighborlist\n"
             "\t                                1: half neighborlist\n"
             "\t                               -1: original miniMD half neighborlist force (not OpenMP safe)\n");
      printf("\t-d / --device <int>:          choose device to use (only applicable for GPU execution)\n");
      printf("\t-dm / --device_map:           map devices to MPI ranks\n");
      printf("\t-ng / --num_gpus <int>:       give number of GPUs per Node (used in conjuction with -dm\n"
             "\t                              to determine device id: 'id=mpi_rank%%ng' (default 2)\n");
      printf("\t--skip_gpu <int>:             skip the specified gpu when assigning devices to MPI ranks\n"
             "\t                              used in conjunction with -dm (but must come first in arg list)\n");
      printf("\t-sse <sse_version>:           use explicit sse intrinsics (use miniMD-SSE variant)\n");
      printf("\t-gn / --ghost_newton <int>:   set usage of newtons third law for ghost atoms\n"
             "\t                                (only applicable with half neighborlists)\n");
      printf("\n  Simulation setup:\n");
      printf("\t-i / --input_file <string>:   set input file to be used (default: in.lj.miniMD)\n");
      printf("\t-n / --nsteps <int>:          set number of timesteps for simulation\n");
      printf("\t-s / --size <int>:            set linear dimension of systembox\n");
      printf("\t-nx/-ny/-nz <int>:            set linear dimension of systembox in x/y/z direction\n");
      printf("\t-b / --neigh_bins <int>:      set linear dimension of neighbor bin grid\n");
      printf("\t-u / --units <string>:        set units (lj or metal), see LAMMPS documentation\n");
      printf("\t-p / --force <string>:        set interaction model (lj or eam)\n");
      printf("\t-f / --data_file <string>:    read configuration from LAMMPS data file\n");

      printf("\n  Miscelaneous:\n");
      printf("\t--check_exchange:             check whether atoms moved further than subdomain width\n");
      printf("\t--safe_exchange:              perform exchange communication with all MPI processes\n"
             "\t                                within rcut_neighbor (outer force cutoff)\n");
      printf("\t--sort <n>:                   resort atoms (simple bins) every <n> steps (default: use reneigh frequency; never=0)");
      printf("\t-o / --yaml_output <int>:     level of yaml output (default 1)\n");
      printf("\t--yaml_screen:                write yaml output also to screen\n");
      printf("\t-h / --help:                  display this help message\n\n");
      printf("---------------------------------------------------------\n\n");

      exit(0);
    }
  }


  Atom atom;
  Neighbor neighbor;
  Integrate integrate;
  Thermo thermo;
  Comm comm;
  Timer timer;
  ThreadData threads;

  Force* force;

  if(in.forcetype == FORCEEAM) {
    force = (Force*) new ForceEAM();

    if(ghost_newton == 1) {
      if(me == 0)
        printf("# EAM currently requires '--ghost_newton 0'; Changing setting now.\n");

      ghost_newton = 0;
    }
  }

  if(in.forcetype == FORCELJ) force = (Force*) new ForceLJ();

  threads.mpi_me = me;
  threads.mpi_num_threads = nprocs;
  threads.omp_me = 0;
  threads.omp_num_threads = num_threads;

  atom.threads = &threads;
  comm.threads = &threads;
  force->threads = &threads;
  integrate.threads = &threads;
  neighbor.threads = &threads;
  thermo.threads = &threads;

  force->epsilon = in.epsilon;
  force->sigma = in.sigma;
  force->sigma6 = in.sigma*in.sigma*in.sigma*in.sigma*in.sigma*in.sigma;

  neighbor.ghost_newton = ghost_newton;

  omp_set_num_threads(num_threads);

  neighbor.timer = &timer;
  force->timer = &timer;
  comm.check_safeexchange = check_safeexchange;
  comm.do_safeexchange = do_safeexchange;
  force->use_sse = use_sse;
  neighbor.halfneigh = halfneigh;

  if(halfneigh < 0) force->use_oldcompute = 1;

  if(use_sse) {
#ifdef VARIANT_REFERENCE

    if(me == 0) printf("ERROR: Trying to run with -sse with miniMD reference version. Use SSE variant instead. Exiting.\n");

    MPI_Finalize();
    exit(0);
#endif
  }

  if(num_steps > 0) in.ntimes = num_steps;

  if(system_size > 0) {
    in.nx = system_size;
    in.ny = system_size;
    in.nz = system_size;
  }

  if(nx > 0) {
    in.nx = nx;
    if(ny > 0)
      in.ny = ny;
    else if(system_size < 0)
      in.ny = nx;

    if(nz > 0)
      in.nz = nz;
    else if(system_size < 0)
      in.nz = nx;
  }

  if(neighbor_size > 0) {
    neighbor.nbinx = neighbor_size;
    neighbor.nbiny = neighbor_size;
    neighbor.nbinz = neighbor_size;
  }

  if(neighbor_size < 0 && in.datafile == NULL) {
    MMD_float neighscale = 5.0 / 6.0;
    neighbor.nbinx = neighscale * in.nx;
    neighbor.nbiny = neighscale * in.ny;
    neighbor.nbinz = neighscale * in.nz;
  }

  if(neighbor_size < 0 && in.datafile)
    neighbor.nbinx = -1;

  if(neighbor.nbinx == 0) neighbor.nbinx = 1;

  if(neighbor.nbiny == 0) neighbor.nbiny = 1;

  if(neighbor.nbinz == 0) neighbor.nbinz = 1;

  integrate.ntimes = in.ntimes;
  integrate.dt = in.dt;
  integrate.sort_every = sort>0?sort:(sort<0?in.neigh_every:0);
  neighbor.every = in.neigh_every;
  neighbor.cutneigh = in.neigh_cut;
  force->cutforce = in.force_cut;
  thermo.nstat = in.thermo_nstat;


  if(me == 0)
    printf("# Create System:\n");

  if(in.datafile) {
    read_lammps_data(atom, comm, neighbor, integrate, thermo, in.datafile, in.units);
    MMD_float volume = atom.box.xprd * atom.box.yprd * atom.box.zprd;
    in.rho = 1.0 * atom.natoms / volume;
    force->setup();

    if(in.forcetype == FORCEEAM) atom.mass = force->mass;
  } else {
    create_box(atom, in.nx, in.ny, in.nz, in.rho);

    comm.setup(neighbor.cutneigh, atom);

    neighbor.setup(atom);

    integrate.setup();

    force->setup();

    if(in.forcetype == FORCEEAM) atom.mass = force->mass;

    create_atoms(atom, in.nx, in.ny, in.nz, in.rho);
    thermo.setup(in.rho, integrate, atom, in.units);

    create_velocity(in.t_request, atom, thermo);

  }

  if(me == 0)
    printf("# Done .... \n");

  if(me == 0) {
    fprintf(stdout, "# " VARIANT_STRING " output ...\n");
    fprintf(stdout, "# Run Settings: \n");
    fprintf(stdout, "\t# MPI processes: %i\n", neighbor.threads->mpi_num_threads);
    fprintf(stdout, "\t# OpenMP threads: %i\n", neighbor.threads->omp_num_threads);
    fprintf(stdout, "\t# Inputfile: %s\n", input_file == 0 ? "in.lj.miniMD" : input_file);
    fprintf(stdout, "\t# Datafile: %s\n", in.datafile ? in.datafile : "None");
    fprintf(stdout, "# Physics Settings: \n");
    fprintf(stdout, "\t# ForceStyle: %s\n", in.forcetype == FORCELJ ? "LJ" : "EAM");
    fprintf(stdout, "\t# Force Parameters: %2.2lf %2.2lf\n",in.epsilon,in.sigma);
    fprintf(stdout, "\t# Units: %s\n", in.units == 0 ? "LJ" : "METAL");
    fprintf(stdout, "\t# Atoms: %i\n", atom.natoms);
    fprintf(stdout, "\t# System size: %2.2lf %2.2lf %2.2lf (unit cells: %i %i %i)\n", atom.box.xprd, atom.box.yprd, atom.box.zprd, in.nx, in.ny, in.nz);
    fprintf(stdout, "\t# Density: %lf\n", in.rho);
    fprintf(stdout, "\t# Force cutoff: %lf\n", force->cutforce);
    fprintf(stdout, "\t# Timestep size: %lf\n", integrate.dt);
    fprintf(stdout, "# Technical Settings: \n");
    fprintf(stdout, "\t# Neigh cutoff: %lf\n", neighbor.cutneigh);
    fprintf(stdout, "\t# Half neighborlists: %i\n", neighbor.halfneigh);
    fprintf(stdout, "\t# Neighbor bins: %i %i %i\n", neighbor.nbinx, neighbor.nbiny, neighbor.nbinz);
    fprintf(stdout, "\t# Neighbor frequency: %i\n", neighbor.every);
    fprintf(stdout, "\t# Sorting frequency: %i\n", integrate.sort_every);
    fprintf(stdout, "\t# Thermo frequency: %i\n", thermo.nstat);
    fprintf(stdout, "\t# Ghost Newton: %i\n", ghost_newton);
    fprintf(stdout, "\t# Use intrinsics: %i\n", force->use_sse);
    fprintf(stdout, "\t# Do safe exchange: %i\n", comm.do_safeexchange);
    fprintf(stdout, "\t# Size of float: %i\n\n", (int) sizeof(MMD_float));
  }

  comm.exchange(atom);
  if(sort>0)
    atom.sort(neighbor);
  comm.borders(atom);

  force->evflag = 1;
  #pragma omp parallel
  {
    neighbor.build(atom);
  
    force->compute(atom, neighbor, comm, me);
  }

  if(neighbor.halfneigh && neighbor.ghost_newton)
    comm.reverse_communicate(atom);

  if(me == 0) printf("# Starting dynamics ...\n");

  if(me == 0) printf("# Timestep T U P Time\n");

  #pragma omp parallel
  {
    thermo.compute(0, atom, neighbor, force, timer, comm);
  }

  timer.barrier_start(TIME_TOTAL);
  integrate.run(atom, force, neighbor, comm, thermo, timer);
  timer.barrier_stop(TIME_TOTAL);

  int natoms;
  MPI_Allreduce(&atom.nlocal, &natoms, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);

  force->evflag = 1;
  force->compute(atom, neighbor, comm, me);

  if(neighbor.halfneigh && neighbor.ghost_newton)
    comm.reverse_communicate(atom);

  thermo.compute(-1, atom, neighbor, force, timer, comm);

  if(me == 0) {
    double time_other = timer.array[TIME_TOTAL] - timer.array[TIME_FORCE] - timer.array[TIME_NEIGH] - timer.array[TIME_COMM];
    printf("\n\n");
    printf("# Performance Summary:\n");
    printf("# MPI_proc OMP_threads nsteps natoms t_total t_force t_neigh t_comm t_other performance perf/thread grep_string t_extra\n");
    printf("%i %i %i %i %lf %lf %lf %lf %lf %lf %lf PERF_SUMMARY %lf\n\n\n",
           nprocs, num_threads, integrate.ntimes, natoms,
           timer.array[TIME_TOTAL], timer.array[TIME_FORCE], timer.array[TIME_NEIGH], timer.array[TIME_COMM], time_other,
           1.0 * natoms * integrate.ntimes / timer.array[TIME_TOTAL], 1.0 * natoms * integrate.ntimes / timer.array[TIME_TOTAL] / nprocs / num_threads, timer.array[TIME_TEST]);

  }

  if(yaml_output)
    output(in, atom, force, neighbor, comm, thermo, integrate, timer, screen_yaml);

  delete force;
  MPI_Barrier(MPI_COMM_WORLD);
  MPI_Finalize();
  return 0;
}