-
Matthieu Schaller authoredMatthieu Schaller authored
main.c 41.13 KiB
/*******************************************************************************
* This file is part of SWIFT.
* Copyright (c) 2012 Pedro Gonnet (pedro.gonnet@durham.ac.uk),
* Matthieu Schaller (matthieu.schaller@durham.ac.uk)
* 2015 Peter W. Draper (p.w.draper@durham.ac.uk)
* Angus Lepper (angus.lepper@ed.ac.uk)
* 2016 John A. Regan (john.a.regan@durham.ac.uk)
* Tom Theuns (tom.theuns@durham.ac.uk)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
/* Config parameters. */
#include "../config.h"
/* Some standard headers. */
#include <errno.h>
#include <fenv.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
/* MPI headers. */
#ifdef WITH_MPI
#include <mpi.h>
#endif
/* Local headers. */
#include "argparse.h"
#include "swift.h"
/* Engine policy flags. */
#ifndef ENGINE_POLICY
#define ENGINE_POLICY engine_policy_none
#endif
/* Global profiler. */
struct profiler prof;
/* Usage string. */
static const char *const swift_usage[] = {
"swift [options] [[--] param-file]",
"swift [options] param-file",
"swift_mpi [options] [[--] param-file]",
"swift_mpi [options] param-file",
NULL,
};
/* Function to handle multiple -P arguments. */
struct cmdparams {
const char *param[PARSER_MAX_NO_OF_PARAMS];
int nparam;
};
static int handle_cmdparam(struct argparse *self, const struct argparse_option *opt) {
struct cmdparams *cmdps = (struct cmdparams *)opt->data;
cmdps->param[cmdps->nparam] = *(char **)opt->value;
cmdps->nparam++;
return 1;
}
/**
* @brief Main routine that loads a few particles and generates some output.
*
*/
int main(int argc, char *argv[]) {
struct clocks_time tic, toc;
struct engine e;
/* Structs used by the engine. Declare now to make sure these are always in
* scope. */
struct chemistry_global_data chemistry;
struct cooling_function_data cooling_func;
struct cosmology cosmo;
struct external_potential potential;
struct star_formation starform;
struct pm_mesh mesh;
struct gpart *gparts = NULL;
struct gravity_props gravity_properties;
struct hydro_props hydro_properties;
struct stars_props stars_properties;
struct entropy_floor_properties entropy_floor;
struct part *parts = NULL;
struct phys_const prog_const;
struct space s;
struct spart *sparts = NULL;
struct unit_system us;
int nr_nodes = 1, myrank = 0;
#ifdef WITH_MPI
/* Start by initializing MPI. */
int res = 0, prov = 0;
if ((res = MPI_Init_thread(&argc, &argv, MPI_THREAD_MULTIPLE, &prov)) !=
MPI_SUCCESS)
error("Call to MPI_Init failed with error %i.", res);
if (prov != MPI_THREAD_MULTIPLE)
error(
"MPI does not provide the level of threading"
" required (MPI_THREAD_MULTIPLE).");
if ((res = MPI_Comm_size(MPI_COMM_WORLD, &nr_nodes)) != MPI_SUCCESS)
error("MPI_Comm_size failed with error %i.", res);
if ((res = MPI_Comm_rank(MPI_COMM_WORLD, &myrank)) != MPI_SUCCESS)
error("Call to MPI_Comm_rank failed with error %i.", res);
/* Make sure messages are stamped with the correct rank. */
engine_rank = myrank;
if ((res = MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN)) !=
MPI_SUCCESS)
error("Call to MPI_Comm_set_errhandler failed with error %i.", res);
if (myrank == 0)
printf("[0000] [00000.0] main: MPI is up and running with %i node(s).\n\n",
nr_nodes);
if (nr_nodes == 1) {
message("WARNING: you are running with one MPI rank.");
message("WARNING: you should use the non-MPI version of this program.");
}
fflush(stdout);
#endif
/* Welcome to SWIFT, you made the right choice */ if (myrank == 0) greetings();
int with_aff = 0;
int dry_run = 0;
int dump_tasks = 0;
int dump_threadpool = 0;
int nsteps = -2;
int restart = 0;
int with_cosmology = 0;
int with_external_gravity = 0;
int with_temperature = 0;
int with_cooling = 0;
int with_self_gravity = 0;
int with_hydro = 0;
int with_stars = 0;
int with_star_formation = 0;
int with_feedback = 0;
int with_limiter = 0;
int with_fp_exceptions = 0;
int with_drift_all = 0;
int with_mpole_reconstruction = 0;
int with_structure_finding = 0;
int verbose = 0;
int nr_threads = 1;
int with_verbose_timers = 0;
char *output_parameters_filename = NULL;
char *cpufreqarg = NULL;
char *param_filename = NULL;
char restart_file[200] = "";
unsigned long long cpufreq = 0;
struct cmdparams cmdps;
cmdps.nparam = 0;
cmdps.param[0] = NULL;
char *buffer = NULL;
/* Parse the command-line parameters. */
struct argparse_option options[] = {
OPT_HELP(),
OPT_GROUP(" Simulation options:\n"),
OPT_BOOLEAN('b', "feedback", &with_feedback, "Run with stars feedback.",
NULL, 0, 0),
OPT_BOOLEAN('c', "cosmology", &with_cosmology,
"Run with cosmological time integration.", NULL, 0, 0),
OPT_BOOLEAN(0, "temperature", &with_temperature,
"Run with temperature calculation.", NULL, 0, 0),
OPT_BOOLEAN('C', "cooling", &with_cooling,
"Run with cooling (also switches on --with-temperature).",
NULL, 0, 0),
OPT_BOOLEAN('D', "drift-all", &with_drift_all,
"Always drift all particles even the ones far from active "
"particles. This emulates Gadget-[23] and GIZMO's default "
"behaviours.",
NULL, 0, 0),
OPT_BOOLEAN('F', "star-formation", &with_star_formation,
"Run with star formation.", NULL, 0, 0),
OPT_BOOLEAN('g', "external-gravity", &with_external_gravity,
"Run with an external gravitational potential.", NULL, 0, 0),
OPT_BOOLEAN('G', "self-gravity", &with_self_gravity,
"Run with self-gravity.", NULL, 0, 0),
OPT_BOOLEAN('M', "multipole-reconstruction", &with_mpole_reconstruction,
"Reconstruct the multipoles every time-step.", NULL, 0, 0),
OPT_BOOLEAN('s', "hydro", &with_hydro, "Run with hydrodynamics.", NULL, 0,
0),
OPT_BOOLEAN('S', "stars", &with_stars, "Run with stars.", NULL, 0, 0),
OPT_BOOLEAN('x', "velociraptor", &with_structure_finding,
"Run with structure finding.", NULL, 0, 0),
OPT_BOOLEAN(0, "limiter", &with_limiter, "Run with time-step limiter.",
NULL, 0, 0),
OPT_GROUP(" Control options:\n"),
OPT_BOOLEAN('a', "pin", &with_aff,
"Pin runners using processor affinity.", NULL, 0, 0),
OPT_BOOLEAN('d', "dry-run", &dry_run,
"Dry run. Read the parameter file, allocates memory but does "
"not read the particles from ICs. Exits before the start of "
"time integration. Checks the validity of parameters and IC "
"files as well as memory limits.",
NULL, 0, 0),
OPT_BOOLEAN('e', "fpe", &with_fp_exceptions,
"Enable floating-point exceptions (debugging mode).", NULL, 0,
0),
OPT_STRING('f', "cpu-frequency", &cpufreqarg,
"Overwrite the CPU "
"frequency (Hz) to be used for time measurements.",
NULL, 0, 0),
OPT_INTEGER('n', "steps", &nsteps,
"Execute a fixed number of time steps. When unset use the "
"time_end parameter to stop.",
NULL, 0, 0),
OPT_STRING('o', "output-params", &output_parameters_filename,
"Generate a default output parameter file.", NULL, 0, 0),
OPT_STRING('P', "param", &buffer,
"Set parameter value, overiding the value read from the "
"parameter file. Can be used more than once {sec:par:value}.",
handle_cmdparam, (intptr_t)&cmdps, 0),
OPT_BOOLEAN('r', "restart", &restart, "Continue using restart files.",
NULL, 0, 0),
OPT_INTEGER('t', "threads", &nr_threads,
"The number of threads to use on each MPI rank. Defaults to "
"1 if not specified.",
NULL, 0, 0),
OPT_INTEGER('T', "timers", &with_verbose_timers,
"Print timers every time-step.", NULL, 0, 0),
OPT_INTEGER('v', "verbose", &verbose,
"Run in verbose mode, in MPI mode 2 outputs from all ranks.",
NULL, 0, 0),
OPT_INTEGER('y', "task-dumps", &dump_tasks,
"Time-step frequency at which task graphs are dumped.", NULL,
0, 0),
OPT_INTEGER('Y', "threadpool-dumps", &dump_threadpool,
"Time-step frequency at which threadpool tasks are dumped.",
NULL, 0, 0),
OPT_END(),
};
struct argparse argparse;
argparse_init(&argparse, options, swift_usage, 0);
argparse_describe(&argparse, "\nParameters:",
"\nSee the file examples/parameter_example.yml for an "
"example of parameter file.");
int nargs = argparse_parse(&argparse, argc, (const char **)argv);
/* Need a parameter file. */
if (nargs != 1) {
if (myrank == 0) argparse_usage(&argparse);
printf("\nError: no parameter file was supplied.\n");
return 1;
}
param_filename = argv[0];
/* Checks of options. */
#if !defined(HAVE_SETAFFINITY) || !defined(HAVE_LIBNUMA)
if (with_aff) {
printf("Error: no NUMA support for thread affinity\n");
return 1;
}
#endif
#ifndef HAVE_FE_ENABLE_EXCEPT
if (with_fp_exceptions) { printf("Error: no support for floating point exceptions\n");
return 1;
}
#endif
#ifndef HAVE_VELOCIRAPTOR
if (with_structure_finding) {
printf("Error: VELOCIraptor is not available\n");
return 1;
}
#endif
#ifndef SWIFT_DEBUG_TASKS
if (dump_tasks) {
if (myrank == 0) {
message(
"WARNING: complete task dumps are only created when "
"configured with --enable-task-debugging.");
message(" Basic task statistics will be output.");
}
}
#endif
#ifndef SWIFT_DEBUG_THREADPOOL
if (dump_threadpool) {
printf(
"Error: threadpool dumping is only possible if SWIFT was "
"configured with the --enable-threadpool-debugging option.\n");
return 1;
}
#endif
/* The CPU frequency is a long long, so we need to parse that ourselves. */
if (cpufreqarg != NULL) {
if (sscanf(cpufreqarg, "%llu", &cpufreq) != 1) {
if (myrank == 0)
printf("Error parsing CPU frequency (%s).\n", cpufreqarg);
return 1;
}
}
/* Write output parameter file */
if (myrank == 0 && output_parameters_filename != NULL) {
io_write_output_field_parameter(output_parameters_filename);
printf("End of run.\n");
return 0;
}
if (!with_self_gravity && !with_hydro && !with_external_gravity) {
if (myrank == 0) {
argparse_usage(&argparse);
printf("\nError: At least one of -s, -g or -G must be chosen.\n");
}
return 1;
}
if (with_stars && !with_external_gravity && !with_self_gravity) {
if (myrank == 0) {
argparse_usage(&argparse);
printf(
"\nError: Cannot process stars without gravity, -g or -G "
"must be chosen.\n");
}
return 1;
}
if (!with_stars && with_feedback) {
if (myrank == 0) {
argparse_usage(&argparse);
printf(
"\nError: Cannot process feedback without stars, --stars must be " "chosen.\n");
}
return 1;
}
if (!with_hydro && with_feedback) {
if (myrank == 0) {
argparse_usage(&argparse);
printf(
"\nError: Cannot process feedback without gas, --hydro must be "
"chosen.\n");
}
return 1;
}
/* Let's pin the main thread, now we know if affinity will be used. */
#if defined(HAVE_SETAFFINITY) && defined(HAVE_LIBNUMA) && defined(_GNU_SOURCE)
if (with_aff &&
((ENGINE_POLICY)&engine_policy_setaffinity) == engine_policy_setaffinity)
engine_pin();
#endif
/* Genesis 1.1: And then, there was time ! */
clocks_set_cpufreq(cpufreq);
/* How vocal are we ? */
const int talking = (verbose == 1 && myrank == 0) || (verbose == 2);
if (myrank == 0 && dry_run)
message(
"Executing a dry run. No i/o or time integration will be performed.");
/* Report CPU frequency.*/
cpufreq = clocks_get_cpufreq();
if (myrank == 0) {
message("CPU frequency used for tick conversion: %llu Hz", cpufreq);
}
/* Report host name(s). */
#ifdef WITH_MPI
if (talking) {
message("Rank %d running on: %s", myrank, hostname());
}
#else
message("Running on: %s", hostname());
#endif
/* Do we have debugging checks ? */
#ifdef SWIFT_DEBUG_CHECKS
if (myrank == 0)
message("WARNING: Debugging checks activated. Code will be slower !");
#endif
/* Do we have debugging checks ? */
#ifdef SWIFT_USE_NAIVE_INTERACTIONS
if (myrank == 0)
message(
"WARNING: Naive cell interactions activated. Code will be slower !");
#endif
/* Do we have gravity accuracy checks ? */
#ifdef SWIFT_GRAVITY_FORCE_CHECKS
if (myrank == 0)
message(
"WARNING: Checking 1/%d of all gpart for gravity accuracy. Code will "
"be slower !",
SWIFT_GRAVITY_FORCE_CHECKS);
#endif
/* Do we choke on FP-exceptions ? */ if (with_fp_exceptions) {
#ifdef HAVE_FE_ENABLE_EXCEPT
feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
#endif
if (myrank == 0)
message("WARNING: Floating point exceptions will be reported.");
}
/* Do we have slow barriers? */
#ifndef HAVE_PTHREAD_BARRIERS
if (myrank == 0)
message("WARNING: Non-optimal thread barriers are being used.");
#endif
/* How large are the parts? */
if (myrank == 0) {
message("sizeof(part) is %4zi bytes.", sizeof(struct part));
message("sizeof(xpart) is %4zi bytes.", sizeof(struct xpart));
message("sizeof(spart) is %4zi bytes.", sizeof(struct spart));
message("sizeof(gpart) is %4zi bytes.", sizeof(struct gpart));
message("sizeof(multipole) is %4zi bytes.", sizeof(struct multipole));
message("sizeof(grav_tensor) is %4zi bytes.", sizeof(struct grav_tensor));
message("sizeof(task) is %4zi bytes.", sizeof(struct task));
message("sizeof(cell) is %4zi bytes.", sizeof(struct cell));
}
/* Read the parameter file */
struct swift_params *params =
(struct swift_params *)malloc(sizeof(struct swift_params));
if (params == NULL) error("Error allocating memory for the parameter file.");
if (myrank == 0) {
message("Reading runtime parameters from file '%s'", param_filename);
parser_read_file(param_filename, params);
/* Handle any command-line overrides. */
if (cmdps.nparam > 0) {
message(
"Overwriting values read from the YAML file with command-line "
"values.");
for (int k = 0; k < cmdps.nparam; k++)
parser_set_param(params, cmdps.param[k]);
}
}
#ifdef WITH_MPI
/* Broadcast the parameter file */
MPI_Bcast(params, sizeof(struct swift_params), MPI_BYTE, 0, MPI_COMM_WORLD);
#endif
/* Temporary early aborts for modes not supported over MPI. */
#ifdef WITH_MPI
if (with_mpole_reconstruction && nr_nodes > 1)
error("Cannot reconstruct m-poles every step over MPI (yet).");
if (with_star_formation)
error("Can't run with star formation over MPI (yet)");
if (with_limiter) error("Can't run with time-step limiter over MPI (yet)");
#endif
/* Temporary early aborts for modes not supported with hand-vec. */
#if defined(WITH_VECTORIZATION) && !defined(CHEMISTRY_NONE)
error(
"Cannot run with chemistry and hand-vectorization (yet). "
"Use --disable-hand-vec at configure time.");
#endif
/* Check that we can write the snapshots by testing if the output
* directory exists and is searchable and writable. */
char basename[PARSER_MAX_LINE_SIZE];
parser_get_param_string(params, "Snapshots:basename", basename);
const char *dirp = dirname(basename);
if (access(dirp, W_OK | X_OK) != 0) { error("Cannot write snapshots in directory %s (%s)", dirp, strerror(errno));
}
/* Check that we can write the structure finding catalogues by testing if the
* output directory exists and is searchable and writable. */
if (with_structure_finding) {
char stfbasename[PARSER_MAX_LINE_SIZE];
parser_get_param_string(params, "StructureFinding:basename", stfbasename);
const char *stfdirp = dirname(stfbasename);
if (access(stfdirp, W_OK | X_OK) != 0) {
error("Cannot write stf catalogues in directory %s (%s)", stfdirp,
strerror(errno));
}
}
/* Prepare the domain decomposition scheme */
struct repartition reparttype;
#ifdef WITH_MPI
struct partition initial_partition;
partition_init(&initial_partition, &reparttype, params, nr_nodes);
/* Let's report what we did */
if (myrank == 0) {
#if defined(HAVE_PARMETIS)
if (reparttype.usemetis)
message("Using METIS serial partitioning:");
else
message("Using ParMETIS partitioning:");
#elif defined(HAVE_METIS)
message("Using METIS serial partitioning:");
#else
message("Non-METIS partitioning:");
#endif
message(" initial partitioning: %s",
initial_partition_name[initial_partition.type]);
if (initial_partition.type == INITPART_GRID)
message(" grid set to [ %i %i %i ].", initial_partition.grid[0],
initial_partition.grid[1], initial_partition.grid[2]);
message(" repartitioning: %s", repartition_name[reparttype.type]);
}
#endif
/* Common variables for restart and IC sections. */
int clean_smoothing_length_values = 0;
int flag_entropy_ICs = 0;
/* Work out where we will read and write restart files. */
char restart_dir[PARSER_MAX_LINE_SIZE];
parser_get_opt_param_string(params, "Restarts:subdir", restart_dir,
"restart");
/* The directory must exist. */
if (myrank == 0) {
if (access(restart_dir, W_OK | X_OK) != 0) {
if (restart) {
error("Cannot restart as no restart subdirectory: %s (%s)", restart_dir,
strerror(errno));
} else {
if (mkdir(restart_dir, 0777) != 0)
error("Failed to create restart directory: %s (%s)", restart_dir,
strerror(errno));
}
}
}
/* Basename for any restart files. */
char restart_name[PARSER_MAX_LINE_SIZE];
parser_get_opt_param_string(params, "Restarts:basename", restart_name,
"swift");
/* How often to check for the stop file and dump restarts and exit the
* application. */
const int restart_stop_steps =
parser_get_opt_param_int(params, "Restarts:stop_steps", 100);
/* Get the maximal wall-clock time of this run */
const float restart_max_hours_runtime =
parser_get_opt_param_float(params, "Restarts:max_run_time", FLT_MAX);
/* Do we want to resubmit when we hit the limit? */
const int resubmit_after_max_hours =
parser_get_opt_param_int(params, "Restarts:resubmit_on_exit", 0);
/* What command should we run to resubmit at the end? */
char resubmit_command[PARSER_MAX_LINE_SIZE];
if (resubmit_after_max_hours)
parser_get_param_string(params, "Restarts:resubmit_command",
resubmit_command);
/* If restarting, look for the restart files. */
if (restart) {
/* Attempting a restart. */
char **restart_files = NULL;
int restart_nfiles = 0;
if (myrank == 0) {
message("Restarting SWIFT");
/* Locate the restart files. */
restart_files =
restart_locate(restart_dir, restart_name, &restart_nfiles);
if (restart_nfiles == 0)
error("Failed to locate any restart files in %s", restart_dir);
/* We need one file per rank. */
if (restart_nfiles != nr_nodes)
error("Incorrect number of restart files, expected %d found %d",
nr_nodes, restart_nfiles);
if (verbose > 0)
for (int i = 0; i < restart_nfiles; i++)
message("found restart file: %s", restart_files[i]);
}
#ifdef WITH_MPI
/* Distribute the restart files, need one for each rank. */
if (myrank == 0) {
for (int i = 1; i < nr_nodes; i++) {
strcpy(restart_file, restart_files[i]);
MPI_Send(restart_file, 200, MPI_BYTE, i, 0, MPI_COMM_WORLD);
}
/* Keep local file. */
strcpy(restart_file, restart_files[0]);
/* Finished with the list. */
restart_locate_free(restart_nfiles, restart_files);
} else {
MPI_Recv(restart_file, 200, MPI_BYTE, 0, 0, MPI_COMM_WORLD,
MPI_STATUS_IGNORE);
}
if (verbose > 1) message("local restart file = %s", restart_file);
#else
/* Just one restart file. */
strcpy(restart_file, restart_files[0]);
#endif
/* Now read it. */
restart_read(&e, restart_file);
/* And initialize the engine with the space and policies. */
if (myrank == 0) clocks_gettime(&tic);
engine_config(1, &e, params, nr_nodes, myrank, nr_threads, with_aff,
talking, restart_file);
if (myrank == 0) {
clocks_gettime(&toc);
message("engine_config took %.3f %s.", clocks_diff(&tic, &toc),
clocks_getunit());
fflush(stdout);
}
/* Check if we are already done when given steps on the command-line. */
if (e.step >= nsteps && nsteps > 0)
error("Not restarting, already completed %d steps", e.step);
} else {
/* Not restarting so look for the ICs. */
/* Initialize unit system and constants */
units_init_from_params(&us, params, "InternalUnitSystem");
phys_const_init(&us, params, &prog_const);
if (myrank == 0) {
message("Internal unit system: U_M = %e g.", us.UnitMass_in_cgs);
message("Internal unit system: U_L = %e cm.", us.UnitLength_in_cgs);
message("Internal unit system: U_t = %e s.", us.UnitTime_in_cgs);
message("Internal unit system: U_I = %e A.", us.UnitCurrent_in_cgs);
message("Internal unit system: U_T = %e K.", us.UnitTemperature_in_cgs);
phys_const_print(&prog_const);
}
/* Read particles and space information from ICs */
char ICfileName[200] = "";
parser_get_param_string(params, "InitialConditions:file_name", ICfileName);
const int periodic =
parser_get_param_int(params, "InitialConditions:periodic");
const int replicate =
parser_get_opt_param_int(params, "InitialConditions:replicate", 1);
clean_smoothing_length_values = parser_get_opt_param_int(
params, "InitialConditions:cleanup_smoothing_lengths", 0);
const int cleanup_h = parser_get_opt_param_int(
params, "InitialConditions:cleanup_h_factors", 0);
const int cleanup_sqrt_a = parser_get_opt_param_int(
params, "InitialConditions:cleanup_velocity_factors", 0);
const int generate_gas_in_ics = parser_get_opt_param_int(
params, "InitialConditions:generate_gas_in_ics", 0);
/* Some checks that we are not doing something stupid */
if (generate_gas_in_ics && flag_entropy_ICs)
error("Can't generate gas if the entropy flag is set in the ICs.");
if (generate_gas_in_ics && !with_cosmology)
error("Can't generate gas if the run is not cosmological.");
/* Initialise the cosmology */
if (with_cosmology)
cosmology_init(params, &us, &prog_const, &cosmo);
else
cosmology_init_no_cosmo(&cosmo);
if (myrank == 0 && with_cosmology) cosmology_print(&cosmo);
/* Initialise the hydro properties */
if (with_hydro)
hydro_props_init(&hydro_properties, &prog_const, &us, params);
else
bzero(&hydro_properties, sizeof(struct hydro_props));
/* Initialise the equation of state */ if (with_hydro)
eos_init(&eos, &prog_const, &us, params);
else
bzero(&eos, sizeof(struct eos_parameters));
/* Initialise the entropy floor */
if (with_hydro)
entropy_floor_init(&entropy_floor, &prog_const, &us, &hydro_properties,
params);
else
bzero(&entropy_floor, sizeof(struct entropy_floor_properties));
/* Initialise the stars properties */
if (with_stars)
stars_props_init(&stars_properties, &prog_const, &us, params,
&hydro_properties);
else
bzero(&stars_properties, sizeof(struct stars_props));
/* Initialise the gravity properties */
if (with_self_gravity)
gravity_props_init(&gravity_properties, params, &cosmo, with_cosmology,
periodic);
else
bzero(&gravity_properties, sizeof(struct gravity_props));
/* Be verbose about what happens next */
if (myrank == 0) message("Reading ICs from file '%s'", ICfileName);
if (myrank == 0 && cleanup_h)
message("Cleaning up h-factors (h=%f)", cosmo.h);
if (myrank == 0 && cleanup_sqrt_a)
message("Cleaning up a-factors from velocity (a=%f)", cosmo.a);
fflush(stdout);
/* Get ready to read particles of all kinds */
size_t Ngas = 0, Ngpart = 0, Nspart = 0;
double dim[3] = {0., 0., 0.};
if (myrank == 0) clocks_gettime(&tic);
#if defined(HAVE_HDF5)
#if defined(WITH_MPI)
#if defined(HAVE_PARALLEL_HDF5)
read_ic_parallel(ICfileName, &us, dim, &parts, &gparts, &sparts, &Ngas,
&Ngpart, &Nspart, &flag_entropy_ICs, with_hydro,
(with_external_gravity || with_self_gravity), with_stars,
cleanup_h, cleanup_sqrt_a, cosmo.h, cosmo.a, myrank,
nr_nodes, MPI_COMM_WORLD, MPI_INFO_NULL, nr_threads,
dry_run);
#else
read_ic_serial(ICfileName, &us, dim, &parts, &gparts, &sparts, &Ngas,
&Ngpart, &Nspart, &flag_entropy_ICs, with_hydro,
(with_external_gravity || with_self_gravity), with_stars,
cleanup_h, cleanup_sqrt_a, cosmo.h, cosmo.a, myrank,
nr_nodes, MPI_COMM_WORLD, MPI_INFO_NULL, nr_threads,
dry_run);
#endif
#else
read_ic_single(ICfileName, &us, dim, &parts, &gparts, &sparts, &Ngas,
&Ngpart, &Nspart, &flag_entropy_ICs, with_hydro,
(with_external_gravity || with_self_gravity), with_stars,
cleanup_h, cleanup_sqrt_a, cosmo.h, cosmo.a, nr_threads,
dry_run);
#endif
#endif
if (myrank == 0) {
clocks_gettime(&toc);
message("Reading initial conditions took %.3f %s.",
clocks_diff(&tic, &toc), clocks_getunit());
fflush(stdout);
}
#ifdef SWIFT_DEBUG_CHECKS
/* Check once and for all that we don't have unwanted links */
if (!with_stars && !dry_run) {
for (size_t k = 0; k < Ngpart; ++k)
if (gparts[k].type == swift_type_stars) error("Linking problem");
}
if (!with_hydro && !dry_run) {
for (size_t k = 0; k < Ngpart; ++k)
if (gparts[k].type == swift_type_gas) error("Linking problem");
}
/* Check that the other links are correctly set */
if (!dry_run)
part_verify_links(parts, gparts, sparts, Ngas, Ngpart, Nspart, 1);
#endif
/* Get the total number of particles across all nodes. */
long long N_total[3] = {0, 0, 0};
#if defined(WITH_MPI)
long long N_long[3] = {Ngas, Ngpart, Nspart};
MPI_Allreduce(&N_long, &N_total, 3, MPI_LONG_LONG_INT, MPI_SUM,
MPI_COMM_WORLD);
#else
N_total[0] = Ngas;
N_total[1] = Ngpart;
N_total[2] = Nspart;
#endif
if (myrank == 0)
message(
"Read %lld gas particles, %lld stars particles and %lld gparts from "
"the ICs.",
N_total[0], N_total[2], N_total[1]);
/* Verify that the fields to dump actually exist */
if (myrank == 0) io_check_output_fields(params, N_total);
/* Initialize the space with these data. */
if (myrank == 0) clocks_gettime(&tic);
space_init(&s, params, &cosmo, dim, parts, gparts, sparts, Ngas, Ngpart,
Nspart, periodic, replicate, generate_gas_in_ics, with_hydro,
with_self_gravity, with_star_formation, talking, dry_run);
if (myrank == 0) {
clocks_gettime(&toc);
message("space_init took %.3f %s.", clocks_diff(&tic, &toc),
clocks_getunit());
fflush(stdout);
}
/* Initialise the long-range gravity mesh */
if (with_self_gravity && periodic) {
#ifdef HAVE_FFTW
pm_mesh_init(&mesh, &gravity_properties, s.dim, nr_threads);
#else
/* Need the FFTW library if periodic and self gravity. */
error(
"No FFTW library found. Cannot compute periodic long-range forces.");
#endif
} else {
pm_mesh_init_no_mesh(&mesh, s.dim);
}
/* Check that the matter content matches the cosmology given in the
* parameter file. */
if (with_cosmology && with_self_gravity && !dry_run)
space_check_cosmology(&s, &cosmo, myrank);
/* Also update the total counts (in case of changes due to replication) */
#if defined(WITH_MPI) N_long[0] = s.nr_parts;
N_long[1] = s.nr_gparts;
N_long[2] = s.nr_sparts;
MPI_Allreduce(&N_long, &N_total, 3, MPI_LONG_LONG_INT, MPI_SUM,
MPI_COMM_WORLD);
#else
N_total[0] = s.nr_parts;
N_total[1] = s.nr_gparts;
N_total[2] = s.nr_sparts;
#endif
/* Say a few nice things about the space we just created. */
if (myrank == 0) {
message("space dimensions are [ %.3f %.3f %.3f ].", s.dim[0], s.dim[1],
s.dim[2]);
message("space %s periodic.", s.periodic ? "is" : "isn't");
message("highest-level cell dimensions are [ %i %i %i ].", s.cdim[0],
s.cdim[1], s.cdim[2]);
message("%zi parts in %i cells.", s.nr_parts, s.tot_cells);
message("%zi gparts in %i cells.", s.nr_gparts, s.tot_cells);
message("%zi sparts in %i cells.", s.nr_sparts, s.tot_cells);
message("maximum depth is %d.", s.maxdepth);
fflush(stdout);
}
/* Verify that we are not using basic modes incorrectly */
if (with_hydro && N_total[0] == 0) {
error(
"ERROR: Running with hydrodynamics but no gas particles found in the "
"ICs!");
}
if ((with_self_gravity || with_external_gravity) && N_total[1] == 0) {
error(
"ERROR: Running with gravity but no gravity particles found in "
"the ICs!");
}
/* Verify that each particle is in it's proper cell. */
if (talking && !dry_run) {
int icount = 0;
space_map_cells_pre(&s, 0, &map_cellcheck, &icount);
message("map_cellcheck picked up %i parts.", icount);
}
/* Verify the maximal depth of cells. */
if (talking && !dry_run) {
int data[2] = {s.maxdepth, 0};
space_map_cells_pre(&s, 0, &map_maxdepth, data);
message("nr of cells at depth %i is %i.", data[0], data[1]);
}
/* Initialise the external potential properties */
bzero(&potential, sizeof(struct external_potential));
if (with_external_gravity)
potential_init(params, &prog_const, &us, &s, &potential);
if (myrank == 0) potential_print(&potential);
/* Initialise the cooling function properties */
bzero(&cooling_func, sizeof(struct cooling_function_data));
if (with_cooling || with_temperature)
cooling_init(params, &us, &prog_const, &cooling_func);
if (myrank == 0) cooling_print(&cooling_func);
/* Initialise the star formation law and its properties */
bzero(&starform, sizeof(struct star_formation));
if (with_star_formation)
starformation_init(params, &prog_const, &us, &hydro_properties,
&starform);
if (with_star_formation && myrank == 0) starformation_print(&starform);
/* Initialise the chemistry */
bzero(&chemistry, sizeof(struct chemistry_global_data));
chemistry_init(params, &us, &prog_const, &chemistry);
if (myrank == 0) chemistry_print(&chemistry);
/* Construct the engine policy */
int engine_policies = ENGINE_POLICY | engine_policy_steal;
if (with_drift_all) engine_policies |= engine_policy_drift_all;
if (with_mpole_reconstruction)
engine_policies |= engine_policy_reconstruct_mpoles;
if (with_hydro) engine_policies |= engine_policy_hydro;
if (with_self_gravity) engine_policies |= engine_policy_self_gravity;
if (with_external_gravity)
engine_policies |= engine_policy_external_gravity;
if (with_cosmology) engine_policies |= engine_policy_cosmology;
if (with_temperature) engine_policies |= engine_policy_temperature;
if (with_limiter) engine_policies |= engine_policy_limiter;
if (with_cooling) engine_policies |= engine_policy_cooling;
if (with_stars) engine_policies |= engine_policy_stars;
if (with_star_formation) engine_policies |= engine_policy_star_formation;
if (with_feedback) engine_policies |= engine_policy_feedback;
if (with_structure_finding)
engine_policies |= engine_policy_structure_finding;
/* Initialize the engine with the space and policies. */
if (myrank == 0) clocks_gettime(&tic);
engine_init(&e, &s, params, N_total[0], N_total[1], N_total[2],
engine_policies, talking, &reparttype, &us, &prog_const, &cosmo,
&hydro_properties, &entropy_floor, &gravity_properties,
&stars_properties, &mesh, &potential, &cooling_func, &starform,
&chemistry);
engine_config(0, &e, params, nr_nodes, myrank, nr_threads, with_aff,
talking, restart_file);
if (myrank == 0) {
clocks_gettime(&toc);
message("engine_init took %.3f %s.", clocks_diff(&tic, &toc),
clocks_getunit());
fflush(stdout);
}
/* Get some info to the user. */
if (myrank == 0) {
long long N_DM = N_total[1] - N_total[2] - N_total[0];
message(
"Running on %lld gas particles, %lld stars particles and %lld DM "
"particles (%lld gravity particles)",
N_total[0], N_total[2], N_total[1] > 0 ? N_DM : 0, N_total[1]);
message(
"from t=%.3e until t=%.3e with %d ranks, %d threads / rank and %d "
"task queues / rank (dt_min=%.3e, dt_max=%.3e)...",
e.time_begin, e.time_end, nr_nodes, e.nr_threads, e.sched.nr_queues,
e.dt_min, e.dt_max);
fflush(stdout);
}
}
/* Time to say good-bye if this was not a serious run. */
if (dry_run) {
#ifdef WITH_MPI
if ((res = MPI_Finalize()) != MPI_SUCCESS)
error("call to MPI_Finalize failed with error %i.", res);
#endif
if (myrank == 0)
message("Time integration ready to start. End of dry-run.");
engine_clean(&e);
free(params);
return 0;
}
/* Initialise the table of Ewald corrections for the gravity checks */
#ifdef SWIFT_GRAVITY_FORCE_CHECKS
if (s.periodic) gravity_exact_force_ewald_init(e.s->dim[0]);
#endif
/* Init the runner history. */
#ifdef HIST
for (k = 0; k < runner_hist_N; k++) runner_hist_bins[k] = 0;
#endif
if (!restart) {
#ifdef WITH_MPI
/* Split the space. */
engine_split(&e, &initial_partition);
engine_redistribute(&e);
#endif
/* Initialise the particles */
engine_init_particles(&e, flag_entropy_ICs, clean_smoothing_length_values);
/* Write the state of the system before starting time integration. */
#ifdef WITH_LOGGER
logger_log_all(e.logger, &e);
engine_dump_index(&e);
#endif
engine_dump_snapshot(&e);
engine_print_stats(&e);
/* Is there a dump before the end of the first time-step? */
engine_check_for_dumps(&e);
}
/* Legend */
if (myrank == 0) {
printf("# %6s %14s %12s %12s %14s %9s %12s %12s %12s %16s [%s] %6s\n",
"Step", "Time", "Scale-factor", "Redshift", "Time-step", "Time-bins",
"Updates", "g-Updates", "s-Updates", "Wall-clock time",
clocks_getunit(), "Props");
fflush(stdout);
}
/* File for the timers */
if (with_verbose_timers) timers_open_file(myrank);
/* Create a name for restart file of this rank. */
if (restart_genname(restart_dir, restart_name, e.nodeID, restart_file, 200) !=
0)
error("Failed to generate restart filename");
/* dump the parameters as used. */
/* used parameters */
parser_write_params_to_file(params, "used_parameters.yml", 1);
/* unused parameters */
parser_write_params_to_file(params, "unused_parameters.yml", 0);
/* Main simulation loop */
/* ==================== */
int force_stop = 0, resubmit = 0;
for (int j = 0; !engine_is_done(&e) && e.step - 1 != nsteps && !force_stop;
j++) {
/* Reset timers */
timers_reset_all();
/* Take a step. */
engine_step(&e);
/* Print the timers. */ if (with_verbose_timers) timers_print(e.step);
/* Every so often allow the user to stop the application and dump the
* restart files. */
if (j % restart_stop_steps == 0) {
force_stop = restart_stop_now(restart_dir, 0);
if (myrank == 0 && force_stop)
message("Forcing application exit, dumping restart files...");
}
/* Did we exceed the maximal runtime? */
if (clocks_get_hours_since_start() > restart_max_hours_runtime) {
force_stop = 1;
message("Runtime limit reached, dumping restart files...");
if (resubmit_after_max_hours) resubmit = 1;
}
/* Also if using nsteps to exit, will not have saved any restarts on exit,
* make sure we do that (useful in testing only). */
if (force_stop || (e.restart_onexit && e.step - 1 == nsteps))
engine_dump_restarts(&e, 0, 1);
/* Dump the task data using the given frequency. */
if (dump_tasks && (dump_tasks == 1 || j % dump_tasks == 1)) {
#ifdef SWIFT_DEBUG_TASKS
task_dump_all(&e, j + 1);
#endif
/* Generate the task statistics. */
char dumpfile[40];
snprintf(dumpfile, 40, "thread_stats-step%d.dat", j + 1);
task_dump_stats(dumpfile, &e, /* header = */ 0, /* allranks = */ 1);
}
#ifdef SWIFT_DEBUG_THREADPOOL
/* Dump the task data using the given frequency. */
if (dump_threadpool && (dump_threadpool == 1 || j % dump_threadpool == 1)) {
char dumpfile[40];
#ifdef WITH_MPI
snprintf(dumpfile, 40, "threadpool_info-rank%d-step%d.dat", engine_rank,
j + 1);
#else
snprintf(dumpfile, 40, "threadpool_info-step%d.dat", j + 1);
#endif // WITH_MPI
threadpool_dump_log(&e.threadpool, dumpfile, 1);
} else {
threadpool_reset_log(&e.threadpool);
}
#endif // SWIFT_DEBUG_THREADPOOL
}
/* Print the values of the runner histogram. */
#ifdef HIST
printf("main: runner histogram data:\n");
for (k = 0; k < runner_hist_N; k++)
printf(" %e %e %e\n",
runner_hist_a + k * (runner_hist_b - runner_hist_a) / runner_hist_N,
runner_hist_a +
(k + 1) * (runner_hist_b - runner_hist_a) / runner_hist_N,
(double)runner_hist_bins[k]);
#endif
/* Write final time information */
if (myrank == 0) {
/* Print some information to the screen */
printf(
" %6d %14e %12.7f %12.7f %14e %4d %4d %12lld %12lld %12lld %21.3f "
"%6d\n",
e.step, e.time, e.cosmology->a, e.cosmology->z, e.time_step, e.min_active_bin, e.max_active_bin, e.updates, e.g_updates, e.s_updates,
e.wallclock_time, e.step_props);
fflush(stdout);
fprintf(e.file_timesteps,
" %6d %14e %12.7f %12.7f %14e %4d %4d %12lld %12lld %12lld %21.3f "
"%6d\n",
e.step, e.time, e.cosmology->a, e.cosmology->z, e.time_step,
e.min_active_bin, e.max_active_bin, e.updates, e.g_updates,
e.s_updates, e.wallclock_time, e.step_props);
fflush(e.file_timesteps);
}
/* Write final output. */
if (!force_stop) {
engine_drift_all(&e, /*drift_mpole=*/0);
engine_print_stats(&e);
#ifdef WITH_LOGGER
logger_log_all(e.logger, &e);
engine_dump_index(&e);
#endif
#ifdef HAVE_VELOCIRAPTOR
if (with_structure_finding && e.snapshot_invoke_stf)
velociraptor_invoke(&e, /*linked_with_snap=*/1);
#endif
/* write a final snapshot */
engine_dump_snapshot(&e);
#ifdef HAVE_VELOCIRAPTOR
if (with_structure_finding && e.snapshot_invoke_stf)
free(e.s->gpart_group_data);
#endif
}
#ifdef WITH_MPI
if ((res = MPI_Finalize()) != MPI_SUCCESS)
error("call to MPI_Finalize failed with error %i.", res);
#endif
/* Remove the stop file if used. Do this anyway, we could have missed the
* stop file if normal exit happened first. */
if (myrank == 0) force_stop = restart_stop_now(restart_dir, 1);
/* Did we want to run a re-submission command just before dying? */
if (myrank == 0 && resubmit) {
message("Running the resubmission command:");
restart_resubmit(resubmit_command);
fflush(stdout);
fflush(stderr);
message("resubmission command completed.");
}
/* Clean everything */
if (with_verbose_timers) timers_close_file();
if (with_cosmology) cosmology_clean(e.cosmology);
if (with_self_gravity) pm_mesh_clean(e.mesh);
if (with_cooling || with_temperature) cooling_clean(&cooling_func);
engine_clean(&e);
free(params);
/* Say goodbye. */
if (myrank == 0) message("done. Bye.");
/* All is calm, all is bright. */
return 0;
}