1 /* Copyright (c) 2009-2010, 2012-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 /* sg_config: configuration infrastructure for the simulation world */
10 #include "xbt/config.h"
12 #include "xbt/mallocator.h"
15 #include "xbt/sysdep.h"
16 #include "surf/surf.h"
17 #include "surf/maxmin.h"
18 #include "instr/instr_interface.h"
19 #include "simgrid/simix.h"
20 #include "simgrid/sg_config.h"
21 #include "simgrid_config.h" /* what was compiled in? */
23 #include "smpi/smpi_interface.h"
26 #include "simgrid/instr.h"
27 #include "src/mc/mc_replay.h"
29 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_config, surf, "About the configuration of SimGrid");
32 /* 0: beginning of time (config cannot be changed yet);
33 * 1: initialized: cfg_set created (config can now be changed);
34 * 2: configured: command line parsed and config part of platform file was
35 * integrated also, platform construction ongoing or done.
36 * (Config cannot be changed anymore!)
38 int _sg_cfg_init_status = 0;
40 /* instruct the upper layer (simix or simdag) to exit as soon as possible */
41 int _sg_cfg_exit_asap = 0;
43 #define sg_cfg_exit_early() do { _sg_cfg_exit_asap = 1; return; } while (0)
45 /* Parse the command line, looking for options */
46 static void sg_config_cmd_line(int *argc, char **argv)
51 for (j = i = 1; i < *argc; i++) {
52 if (!strncmp(argv[i], "--cfg=", strlen("--cfg="))) {
53 char *opt = strchr(argv[i], '=');
56 xbt_cfg_set_parse(opt);
57 XBT_DEBUG("Did apply '%s' as config setting", opt);
58 } else if (!strcmp(argv[i], "--version")) {
59 printf("%s\n", SIMGRID_VERSION_STRING);
61 } else if (!strcmp(argv[i], "--cfg-help") || !strcmp(argv[i], "--help")) {
62 printf("Description of the configuration accepted by this simulator:\n");
66 "Each of these configurations can be used by adding\n"
67 " --cfg=<option name>:<option value>\n"
68 "to the command line.\n"
70 "For more information, please refer to:\n"
71 " --help-aliases for the list of all option aliases.\n"
72 " --help-logs and --help-log-categories for the details of logging output.\n"
73 " --help-models for a list of all models known by this simulator.\n"
74 " --help-tracing for the details of all tracing options known by this simulator.\n"
75 " --version to get SimGrid version information.\n"
79 } else if (!strcmp(argv[i], "--help-aliases")) {
80 printf("Here is a list of all deprecated option names, with their replacement.\n");
82 printf("Please consider using the recent names\n");
84 } else if (!strcmp(argv[i], "--help-models")) {
85 model_help("host", surf_host_model_description);
87 model_help("CPU", surf_cpu_model_description);
89 model_help("network", surf_network_model_description);
90 printf("\nLong description of all optimization levels accepted by the models of this simulator:\n");
91 for (int k = 0; surf_optimization_mode_description[k].name; k++)
93 surf_optimization_mode_description[k].name,
94 surf_optimization_mode_description[k].description);
95 printf("Both network and CPU models have 'Lazy' as default optimization level\n\n");
97 } else if (!strcmp(argv[i], "--help-tracing")) {
112 /* callback of the plugin variable */
113 static void _sg_cfg_cb__plugin(const char *name)
115 xbt_assert(_sg_cfg_init_status < 2, "Cannot load a plugin after the initialization");
117 char *val = xbt_cfg_get_string(name);
121 if (!strcmp(val, "help")) {
122 model_help("plugin", surf_plugin_description);
126 int plugin_id = find_model_description(surf_plugin_description, val);
127 surf_plugin_description[plugin_id].model_init_preparse();
130 /* callback of the host/model variable */
131 static void _sg_cfg_cb__host_model(const char *name)
133 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
135 char *val = xbt_cfg_get_string(name);
136 if (!strcmp(val, "help")) {
137 model_help("host", surf_host_model_description);
141 /* Make sure that the model exists */
142 find_model_description(surf_host_model_description, val);
145 /* callback of the vm/model variable */
146 static void _sg_cfg_cb__vm_model(const char *name)
148 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
150 char *val = xbt_cfg_get_string(name);
151 if (!strcmp(val, "help")) {
152 model_help("vm", surf_vm_model_description);
156 /* Make sure that the model exists */
157 find_model_description(surf_vm_model_description, val);
160 /* callback of the cpu/model variable */
161 static void _sg_cfg_cb__cpu_model(const char *name)
163 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
165 char *val = xbt_cfg_get_string(name);
166 if (!strcmp(val, "help")) {
167 model_help("CPU", surf_cpu_model_description);
171 /* New Module missing */
172 find_model_description(surf_cpu_model_description, val);
175 /* callback of the cpu/model variable */
176 static void _sg_cfg_cb__optimization_mode(const char *name)
178 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
180 char *val = xbt_cfg_get_string(name);
181 if (!strcmp(val, "help")) {
182 model_help("optimization", surf_optimization_mode_description);
186 /* New Module missing */
187 find_model_description(surf_optimization_mode_description, val);
190 /* callback of the cpu/model variable */
191 static void _sg_cfg_cb__storage_mode(const char *name)
193 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
195 char *val = xbt_cfg_get_string(name);
196 if (!strcmp(val, "help")) {
197 model_help("storage", surf_storage_model_description);
201 find_model_description(surf_storage_model_description, val);
204 /* callback of the network_model variable */
205 static void _sg_cfg_cb__network_model(const char *name)
207 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
209 char *val = xbt_cfg_get_string(name);
210 if (!strcmp(val, "help")) {
211 model_help("network", surf_network_model_description);
215 /* New Module missing */
216 find_model_description(surf_network_model_description, val);
219 /* callbacks of the network models values */
220 static void _sg_cfg_cb__tcp_gamma(const char *name)
222 sg_tcp_gamma = xbt_cfg_get_double(name);
225 static void _sg_cfg_cb__maxmin_precision(const char* name)
227 sg_maxmin_precision = xbt_cfg_get_double(name);
230 static void _sg_cfg_cb__surf_precision(const char* name)
232 sg_surf_precision = xbt_cfg_get_double(name);
235 static void _sg_cfg_cb__sender_gap(const char* name)
237 sg_sender_gap = xbt_cfg_get_double(name);
240 static void _sg_cfg_cb__latency_factor(const char *name)
242 sg_latency_factor = xbt_cfg_get_double(name);
245 static void _sg_cfg_cb__bandwidth_factor(const char *name)
247 sg_bandwidth_factor = xbt_cfg_get_double(name);
250 static void _sg_cfg_cb__weight_S(const char *name)
252 sg_weight_S_parameter = xbt_cfg_get_double(name);
256 /* callback of the mpi collectives: simply check that this is a valid name. It will be picked up in smpi_global.cpp */
257 static void _check_coll(const char *category,
258 s_mpi_coll_description_t * table,
261 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the collective algorithm after the initialization");
263 char *val = xbt_cfg_get_string(name);
264 if (val && !strcmp(val, "help")) {
265 coll_help(category, table);
269 find_coll_description(table, val, category);
271 static void _check_coll_gather(const char *name){
272 _check_coll("gather", mpi_coll_gather_description, name);
274 static void _check_coll_allgather(const char *name){
275 _check_coll("allgather", mpi_coll_allgather_description, name);
277 static void _check_coll_allgatherv(const char *name){
278 _check_coll("allgatherv", mpi_coll_allgatherv_description, name);
280 static void _check_coll_allreduce(const char *name)
282 _check_coll("allreduce", mpi_coll_allreduce_description, name);
284 static void _check_coll_alltoall(const char *name)
286 _check_coll("alltoall", mpi_coll_alltoall_description, name);
288 static void _check_coll_alltoallv(const char *name)
290 _check_coll("alltoallv", mpi_coll_alltoallv_description, name);
292 static void _check_coll_bcast(const char *name)
294 _check_coll("bcast", mpi_coll_bcast_description, name);
296 static void _check_coll_reduce(const char *name)
298 _check_coll("reduce", mpi_coll_reduce_description, name);
300 static void _check_coll_reduce_scatter(const char *name){
301 _check_coll("reduce_scatter", mpi_coll_reduce_scatter_description, name);
303 static void _check_coll_scatter(const char *name){
304 _check_coll("scatter", mpi_coll_scatter_description, name);
306 static void _check_coll_barrier(const char *name){
307 _check_coll("barrier", mpi_coll_barrier_description, name);
310 static void _sg_cfg_cb__wtime_sleep(const char *name){
311 smpi_wtime_sleep = xbt_cfg_get_double(name);
314 static void _sg_cfg_cb__iprobe_sleep(const char *name){
315 smpi_iprobe_sleep = xbt_cfg_get_double(name);
318 static void _sg_cfg_cb__test_sleep(const char *name){
319 smpi_test_sleep = xbt_cfg_get_double(name);
323 /* callback of the inclusion path */
324 static void _sg_cfg_cb__surf_path(const char *name)
326 char *path = xbt_strdup(xbt_cfg_get_string(name));
327 if (path[0]) // ignore ""
328 xbt_dynar_push(surf_path, &path);
331 /* callback to decide if we want to use the model-checking */
332 #include "src/xbt_modinter.h"
334 static void _sg_cfg_cb_model_check_replay(const char *name) {
335 MC_record_path = xbt_cfg_get_string(name);
339 extern int _sg_do_model_check_record;
340 static void _sg_cfg_cb_model_check_record(const char *name) {
341 _sg_do_model_check_record = xbt_cfg_get_boolean(name);
345 extern int _sg_do_verbose_exit;
346 static void _sg_cfg_cb_verbose_exit(const char *name)
348 _sg_do_verbose_exit = xbt_cfg_get_boolean(name);
351 extern int _sg_do_clean_atexit;
352 static void _sg_cfg_cb_clean_atexit(const char *name)
354 _sg_do_clean_atexit = xbt_cfg_get_boolean(name);
357 static void _sg_cfg_cb_context_factory(const char *name)
359 smx_context_factory_name = xbt_cfg_get_string(name);
362 static void _sg_cfg_cb_context_stack_size(const char *name)
364 smx_context_stack_size_was_set = 1;
365 smx_context_stack_size = xbt_cfg_get_int(name) * 1024;
368 static void _sg_cfg_cb_context_guard_size(const char *name)
370 smx_context_guard_size_was_set = 1;
371 smx_context_guard_size = xbt_cfg_get_int(name) * xbt_pagesize;
374 static void _sg_cfg_cb_contexts_nthreads(const char *name)
376 SIMIX_context_set_nthreads(xbt_cfg_get_int(name));
379 static void _sg_cfg_cb_contexts_parallel_threshold(const char *name)
381 SIMIX_context_set_parallel_threshold(xbt_cfg_get_int(name));
384 static void _sg_cfg_cb_contexts_parallel_mode(const char *name)
386 const char* mode_name = xbt_cfg_get_string(name);
387 if (!strcmp(mode_name, "posix")) {
388 SIMIX_context_set_parallel_mode(XBT_PARMAP_POSIX);
390 else if (!strcmp(mode_name, "futex")) {
391 SIMIX_context_set_parallel_mode(XBT_PARMAP_FUTEX);
393 else if (!strcmp(mode_name, "busy_wait")) {
394 SIMIX_context_set_parallel_mode(XBT_PARMAP_BUSY_WAIT);
397 xbt_die("Command line setting of the parallel synchronization mode should "
398 "be one of \"posix\", \"futex\" or \"busy_wait\"");
402 static void _sg_cfg_cb__surf_network_coordinates(const char *name)
404 static int already_set = 0;
405 int val = xbt_cfg_get_boolean(name);
408 COORD_HOST_LEVEL = sg_host_extension_create(xbt_dynar_free_voidp);
409 COORD_ASR_LEVEL = xbt_lib_add_level(as_router_lib,xbt_dynar_free_voidp);
414 xbt_die("Setting of whether to use coordinate cannot be disabled once set.");
417 static void _sg_cfg_cb__surf_network_crosstraffic(const char *name)
419 sg_network_crosstraffic = xbt_cfg_get_boolean(name);
422 /* build description line with possible values */
423 static void describe_model(char *result,
424 const s_surf_model_description_t model_description[],
426 const char *description)
429 sprintf(result, "%s. Possible values: %s", description,
430 model_description[0].name ? model_description[0].name : "n/a");
431 for (int i = 1; model_description[i].name; i++)
432 p += sprintf(p, ", %s", model_description[i].name);
433 sprintf(p, ".\n (use 'help' as a value to see the long description of each %s)", name);
436 /* create the config set, register what should be and parse the command line*/
437 void sg_config_init(int *argc, char **argv)
439 char description[1024];
441 /* Create the configuration support */
442 if (_sg_cfg_init_status == 0) { /* Only create stuff if not already inited */
444 /* Plugins configuration */
445 describe_model(description, surf_plugin_description, "plugin", "The plugins");
446 xbt_cfg_register_string("plugin", nullptr, &_sg_cfg_cb__plugin, description);
448 describe_model(description, surf_cpu_model_description, "model", "The model to use for the CPU");
449 xbt_cfg_register_string("cpu/model", "Cas01", &_sg_cfg_cb__cpu_model, description);
451 describe_model(description, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the CPU");
452 xbt_cfg_register_string("cpu/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
454 describe_model(description, surf_storage_model_description, "model", "The model to use for the storage");
455 xbt_cfg_register_string("storage/model", "default", &_sg_cfg_cb__storage_mode, description);
457 describe_model(description, surf_network_model_description, "model", "The model to use for the network");
458 xbt_cfg_register_string("network/model", "LV08", &_sg_cfg_cb__network_model, description);
460 describe_model(description, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the network");
461 xbt_cfg_register_string("network/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
463 describe_model(description, surf_host_model_description, "model", "The model to use for the host");
464 xbt_cfg_register_string("host/model", "default", &_sg_cfg_cb__host_model, description);
466 describe_model(description, surf_vm_model_description, "model", "The model to use for the vm");
467 xbt_cfg_register_string("vm/model", "default", &_sg_cfg_cb__vm_model, description);
469 xbt_cfg_register_double("network/TCP_gamma", 4194304.0, _sg_cfg_cb__tcp_gamma,
470 "Size of the biggest TCP window (cat /proc/sys/net/ipv4/tcp_[rw]mem for recv/send window; Use the last given value, which is the max window size)");
471 xbt_cfg_register_double("surf/precision", 0.00001, _sg_cfg_cb__surf_precision,
472 "Numerical precision used when updating simulation times (in seconds)");
473 xbt_cfg_register_double("maxmin/precision", 0.00001, _sg_cfg_cb__maxmin_precision,
474 "Numerical precision used when computing resource sharing (in ops/sec or bytes/sec)");
476 /* The parameters of network models */
478 xbt_cfg_register_double("network/sender_gap", NAN, _sg_cfg_cb__sender_gap,
479 "Minimum gap between two overlapping sends"); /* real default for "network/sender_gap" is set in network_smpi.cpp */
480 xbt_cfg_register_double("network/latency_factor", 1.0, _sg_cfg_cb__latency_factor,
481 "Correction factor to apply to the provided latency (default value set by network model)");
482 xbt_cfg_register_double("network/bandwidth_factor", 1.0, _sg_cfg_cb__bandwidth_factor, "Correction factor to apply to the provided bandwidth (default value set by network model)");
483 xbt_cfg_register_double("network/weight_S", NAN, _sg_cfg_cb__weight_S, /* real default for "network/weight_S" is set in network_*.cpp */
484 "Correction factor to apply to the weight of competing streams (default value set by network model)");
487 xbt_cfg_register_string("path", "", _sg_cfg_cb__surf_path, "Lookup path for inclusions in platform and deployment XML files");
489 xbt_cfg_register_boolean("cpu/maxmin_selective_update", "no", NULL,
490 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)");
491 xbt_cfg_register_boolean("network/maxmin_selective_update", "no", NULL,
492 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)");
493 /* Replay (this part is enabled even if MC it disabled) */
494 xbt_cfg_register_string("model-check/replay", nullptr, _sg_cfg_cb_model_check_replay,
495 "Model-check path to replay (as reported by SimGrid when a violation is reported)");
498 /* do model-checking-record */
499 xbt_cfg_register_boolean("model-check/record", "no", _sg_cfg_cb_model_check_record, "Record the model-checking paths");
501 xbt_cfg_register_int("model-check/checkpoint", 0, _mc_cfg_cb_checkpoint,
502 "Specify the amount of steps between checkpoints during stateful model-checking (default: 0 => stateless verification). "
503 "If value=1, one checkpoint is saved for each step => faster verification, but huge memory consumption; higher values are good compromises between speed and memory consumption.");
505 xbt_cfg_register_boolean("model-check/sparse_checkpoint", "no", _mc_cfg_cb_sparse_checkpoint, "Use sparse per-page snapshots.");
506 xbt_cfg_register_boolean("model-check/ksm", "no", _mc_cfg_cb_ksm, "Kernel same-page merging");
508 xbt_cfg_register_string("model-check/property","", _mc_cfg_cb_property,
509 "Name of the file containing the property, as formated by the ltl2ba program.");
510 xbt_cfg_register_boolean("model-check/communications_determinism", "no", _mc_cfg_cb_comms_determinism,
511 "Whether to enable the detection of communication determinism");
513 xbt_cfg_register_boolean("model-check/send_determinism", "no", _mc_cfg_cb_send_determinism,
514 "Enable/disable the detection of send-determinism in the communications schemes");
516 /* Specify the kind of model-checking reduction */
517 xbt_cfg_register_string("model-check/reduction", "dpor", _mc_cfg_cb_reduce,
518 "Specify the kind of exploration reduction (either none or DPOR)");
519 xbt_cfg_register_boolean("model-check/timeout", "no", _mc_cfg_cb_timeout,
520 "Whether to enable timeouts for wait requests");
522 xbt_cfg_register_boolean("model-check/hash", "no", _mc_cfg_cb_hash, "Whether to enable state hash for state comparison (experimental)");
523 xbt_cfg_register_boolean("model-check/snapshot_fds", "no", _mc_cfg_cb_snapshot_fds,
524 "Whether file descriptors must be snapshoted (currently unusable)");
525 xbt_cfg_register_int("model-check/max_depth", 1000, _mc_cfg_cb_max_depth, "Maximal exploration depth (default: 1000)");
526 xbt_cfg_register_int("model-check/visited", 0, _mc_cfg_cb_visited,
527 "Specify the number of visited state stored for state comparison reduction. If value=5, the last 5 visited states are stored. If value=0 (the default), all states are stored.");
529 xbt_cfg_register_string("model-check/dot_output", "", _mc_cfg_cb_dot_output, "Name of dot output file corresponding to graph state");
530 xbt_cfg_register_boolean("model-check/termination", "no", _mc_cfg_cb_termination, "Whether to enable non progressive cycle detection");
533 xbt_cfg_register_boolean("verbose-exit", "yes", _sg_cfg_cb_verbose_exit, "Activate the \"do nothing\" mode in Ctrl-C");
535 /* context factory */
536 const char *dflt_ctx_fact = "thread";
538 char *p = description +
539 sprintf(description, "Context factory to use in SIMIX. Possible values: %s", dflt_ctx_fact);
540 #if HAVE_UCONTEXT_CONTEXTS
541 dflt_ctx_fact = "ucontext";
542 p += sprintf(p, ", %s", dflt_ctx_fact);
544 #if HAVE_RAW_CONTEXTS
545 dflt_ctx_fact = "raw";
546 p += sprintf(p, ", %s", dflt_ctx_fact);
550 xbt_cfg_register_string("contexts/factory", dflt_ctx_fact, _sg_cfg_cb_context_factory, description);
552 xbt_cfg_register_int("contexts/stack_size", 8*1024, _sg_cfg_cb_context_stack_size, "Stack size of contexts in KiB");
553 /* (FIXME: this is unpleasant) Reset this static variable that was altered when setting the default value. */
554 smx_context_stack_size_was_set = 0;
556 /* guard size for contexts stacks in memory pages */
557 xbt_cfg_register_int("contexts/guard_size",
558 #if defined(_WIN32) || (PTH_STACKGROWTH != -1)
563 _sg_cfg_cb_context_guard_size, "Guard size for contexts stacks in memory pages");
564 /* No, it was not set yet (the above setdefault() changed this to 1). */
565 smx_context_guard_size_was_set = 0;
567 xbt_cfg_register_int("contexts/nthreads", 1, _sg_cfg_cb_contexts_nthreads, "Number of parallel threads used to execute user contexts");
569 xbt_cfg_register_int("contexts/parallel_threshold", 2, _sg_cfg_cb_contexts_parallel_threshold,
570 "Minimal number of user contexts to be run in parallel (raw contexts only)");
572 /* synchronization mode for parallel user contexts */
574 xbt_cfg_register_string("contexts/synchro", "futex", _sg_cfg_cb_contexts_parallel_mode,
575 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
576 #else //No futex on mac and posix is unimplememted yet
577 xbt_cfg_register_string("contexts/synchro", "busy_wait", _sg_cfg_cb_contexts_parallel_mode,
578 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
581 xbt_cfg_register_boolean("network/coordinates", "no", _sg_cfg_cb__surf_network_coordinates,
582 "Whether we use a coordinate-based routing (as Vivaldi)");
584 xbt_cfg_register_boolean("network/crosstraffic", "yes", _sg_cfg_cb__surf_network_crosstraffic,
585 "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)");
588 xbt_cfg_register_string("ns3/TcpModel", "default", NULL, "The ns3 tcp model can be : NewReno or Reno or Tahoe");
591 //For smpi/bw_factor and smpi/lat_factor
592 // SMPI model can be used without enable_smpi, so keep this out of the ifdef.
593 xbt_cfg_register_string("smpi/bw_factor",
594 "65472:0.940694;15424:0.697866;9376:0.58729;5776:1.08739;3484:0.77493;1426:0.608902;732:0.341987;257:0.338112;0:0.812084", NULL,
595 "Bandwidth factors for smpi. Format: 'threshold0:value0;threshold1:value1;...;thresholdN:valueN', meaning if(size >=thresholdN ) return valueN.");
597 xbt_cfg_register_string("smpi/lat_factor",
598 "65472:11.6436;15424:3.48845;9376:2.59299;5776:2.18796;3484:1.88101;1426:1.61075;732:1.9503;257:1.95341;0:2.01467", NULL, "Latency factors for smpi.");
600 xbt_cfg_register_string("smpi/IB_penalty_factors", "0.965;0.925;1.35", NULL,
601 "Correction factor to communications using Infiniband model with contention (default value based on Stampede cluster profiling)");
604 xbt_cfg_register_double("smpi/running_power", 20000.0, NULL, "Power of the host running the simulation (in flop/s). Used to bench the operations.");
605 xbt_cfg_register_boolean("smpi/display_timing", "no", NULL, "Whether we should display the timing after simulation.");
606 xbt_cfg_register_boolean("smpi/simulate_computation", "yes", NULL, "Whether the computational part of the simulated application should be simulated.");
607 xbt_cfg_register_boolean("smpi/use_shared_malloc", "yes", NULL, "Whether SMPI_SHARED_MALLOC is enabled. Disable it for debugging purposes.");
608 xbt_cfg_register_double("smpi/cpu_threshold", 1e-6, NULL, "Minimal computation time (in seconds) not discarded, or -1 for infinity.");
609 xbt_cfg_register_int("smpi/async_small_thresh", 0, NULL,
610 "Maximal size of messages that are to be sent asynchronously, without waiting for the receiver");
611 xbt_cfg_register_int("smpi/send_is_detached_thresh", 65536, NULL,
612 "Threshold of message size where MPI_Send stops behaving like MPI_Isend and becomes MPI_Ssend");
614 xbt_cfg_register_boolean("smpi/privatize_global_variables", "no", NULL, "Whether we should privatize global variable at runtime.");
615 xbt_cfg_register_string("smpi/os", "1:0:0:0:0", NULL, "Small messages timings (MPI_Send minimum time for small messages)");
616 xbt_cfg_register_string("smpi/ois", "1:0:0:0:0", NULL, "Small messages timings (MPI_Isend minimum time for small messages)");
617 xbt_cfg_register_string("smpi/or", "1:0:0:0:0", NULL, "Small messages timings (MPI_Recv minimum time for small messages)");
618 xbt_cfg_register_double("smpi/iprobe", 1e-4, _sg_cfg_cb__iprobe_sleep, "Minimum time to inject inside a call to MPI_Iprobe");
619 xbt_cfg_register_double("smpi/test", 1e-4, _sg_cfg_cb__test_sleep, "Minimum time to inject inside a call to MPI_Test");
620 xbt_cfg_register_double("smpi/wtime", 0.0, _sg_cfg_cb__wtime_sleep, "Minimum time to inject inside a call to MPI_Wtime");
622 xbt_cfg_register_string("smpi/coll_selector", "default", NULL, "Which collective selector to use");
623 xbt_cfg_register_string("smpi/gather", nullptr, &_check_coll_gather, "Which collective to use for gather");
624 xbt_cfg_register_string("smpi/allgather", nullptr, &_check_coll_allgather, "Which collective to use for allgather");
625 xbt_cfg_register_string("smpi/barrier", nullptr, &_check_coll_barrier, "Which collective to use for barrier");
626 xbt_cfg_register_string("smpi/reduce_scatter",nullptr, &_check_coll_reduce_scatter, "Which collective to use for reduce_scatter");
627 xbt_cfg_register_string("smpi/scatter", nullptr, &_check_coll_scatter, "Which collective to use for scatter");
628 xbt_cfg_register_string("smpi/allgatherv", nullptr, &_check_coll_allgatherv, "Which collective to use for allgatherv");
629 xbt_cfg_register_string("smpi/allreduce", nullptr, &_check_coll_allreduce, "Which collective to use for allreduce");
630 xbt_cfg_register_string("smpi/alltoall", nullptr, &_check_coll_alltoall, "Which collective to use for alltoall");
631 xbt_cfg_register_string("smpi/alltoallv", nullptr, &_check_coll_alltoallv,"Which collective to use for alltoallv");
632 xbt_cfg_register_string("smpi/bcast", nullptr, &_check_coll_bcast, "Which collective to use for bcast");
633 xbt_cfg_register_string("smpi/reduce", nullptr, &_check_coll_reduce, "Which collective to use for reduce");
636 xbt_cfg_register_boolean("exception/cutpath", "no", NULL,
637 "Whether to cut all path information from call traces, used e.g. in exceptions.");
639 xbt_cfg_register_boolean("clean_atexit", "yes", _sg_cfg_cb_clean_atexit,
640 "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.");
643 /* retrieves the current directory of the current process */
644 const char *initial_path = __surf_get_initial_path();
645 xbt_assert((initial_path), "__surf_get_initial_path() failed! Can't resolve current Windows directory");
647 surf_path = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
648 xbt_cfg_setdefault_string("path", initial_path);
651 _sg_cfg_init_status = 1;
653 sg_config_cmd_line(argc, argv);
655 xbt_mallocator_initialization_is_done(SIMIX_context_is_parallel());
657 XBT_WARN("Call to sg_config_init() after initialization ignored");
661 void sg_config_finalize(void)
663 if (!_sg_cfg_init_status)
664 return; /* Not initialized yet. Nothing to do */
666 xbt_cfg_free(&simgrid_config);
667 _sg_cfg_init_status = 0;