1 /* Copyright (c) 2009-2010, 2012-2014. 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 "smpi/smpi_interface.h"
23 #include "mc/mc_record.h"
24 #include "simgrid/instr.h"
25 #include "mc/mc_replay.h"
27 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_config, surf,
28 "About the configuration of simgrid");
30 xbt_cfg_t _sg_cfg_set = NULL;
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
42 int _sg_cfg_exit_asap = 0;
44 #define sg_cfg_exit_early() do { _sg_cfg_exit_asap = 1; return; } while (0)
46 /* Parse the command line, looking for options */
47 static void sg_config_cmd_line(int *argc, char **argv)
53 for (j = i = 1; i < *argc; i++) {
54 if (!strncmp(argv[i], "--cfg=", strlen("--cfg="))) {
55 opt = strchr(argv[i], '=');
58 xbt_cfg_set_parse(_sg_cfg_set, opt);
59 XBT_DEBUG("Did apply '%s' as config setting", opt);
60 } else if (!strcmp(argv[i], "--version")) {
61 printf("%s\n", SIMGRID_VERSION_STRING);
63 } else if (!strcmp(argv[i], "--cfg-help") || !strcmp(argv[i], "--help")) {
65 ("Description of the configuration accepted by this simulator:\n");
66 xbt_cfg_help(_sg_cfg_set);
69 "Each of these configurations can be used by adding\n"
70 " --cfg=<option name>:<option value>\n"
71 "to the command line.\n"
73 "You can also use --help-models to see the details of all models known by this simulator.\n"
75 "You can also use --help-tracing to see the details of all tracing options known by this simulator.\n"
77 "You can also use --help-logs and --help-log-categories to see the details of logging output.\n"
79 "You can also use --version to get SimGrid version information.\n"
83 } else if (!strcmp(argv[i], "--help-models")) {
86 model_help("workstation", surf_workstation_model_description);
88 model_help("CPU", surf_cpu_model_description);
90 model_help("network", surf_network_model_description);
91 printf("\nLong description of all optimization levels accepted by the models of this simulator:\n");
92 for (k = 0; surf_optimization_mode_description[k].name; k++)
94 surf_optimization_mode_description[k].name,
95 surf_optimization_mode_description[k].description);
96 printf("Both network and CPU models have 'Lazy' as default optimization level\n\n");
98 } else if (!strcmp(argv[i], "--help-tracing")) {
113 /* callback of the plugin variable */
114 static void _sg_cfg_cb__plugin(const char *name, int pos)
119 xbt_assert(_sg_cfg_init_status < 2,
120 "Cannot load a plugin after the initialization");
122 val = xbt_cfg_get_string(_sg_cfg_set, name);
124 if (!strcmp(val, "help")) {
125 model_help("plugin", surf_plugin_description);
129 /* New Module missing */
130 int plugin_id = find_model_description(surf_plugin_description, val);
131 surf_plugin_description[plugin_id].model_init_preparse();
134 /* callback of the workstation/model variable */
135 static void _sg_cfg_cb__workstation_model(const char *name, int pos)
139 xbt_assert(_sg_cfg_init_status < 2,
140 "Cannot change the model after the initialization");
142 val = xbt_cfg_get_string(_sg_cfg_set, name);
144 if (!strcmp(val, "help")) {
145 model_help("workstation", surf_workstation_model_description);
149 /* Make sure that the model exists */
150 find_model_description(surf_workstation_model_description, val);
153 /* callback of the vm_workstation/model variable */
154 static void _sg_cfg_cb__vm_workstation_model(const char *name, int pos)
158 xbt_assert(_sg_cfg_init_status < 2,
159 "Cannot change the model after the initialization");
161 val = xbt_cfg_get_string(_sg_cfg_set, name);
163 if (!strcmp(val, "help")) {
164 model_help("vm_workstation", surf_vm_workstation_model_description);
168 /* Make sure that the model exists */
169 find_model_description(surf_vm_workstation_model_description, val);
172 /* callback of the cpu/model variable */
173 static void _sg_cfg_cb__cpu_model(const char *name, int pos)
177 xbt_assert(_sg_cfg_init_status < 2,
178 "Cannot change the model after the initialization");
180 val = xbt_cfg_get_string(_sg_cfg_set, name);
182 if (!strcmp(val, "help")) {
183 model_help("CPU", surf_cpu_model_description);
187 /* New Module missing */
188 find_model_description(surf_cpu_model_description, val);
191 /* callback of the cpu/model variable */
192 static void _sg_cfg_cb__optimization_mode(const char *name, int pos)
196 xbt_assert(_sg_cfg_init_status < 2,
197 "Cannot change the model after the initialization");
199 val = xbt_cfg_get_string(_sg_cfg_set, name);
201 if (!strcmp(val, "help")) {
202 model_help("optimization", surf_optimization_mode_description);
206 /* New Module missing */
207 find_model_description(surf_optimization_mode_description, val);
210 /* callback of the cpu/model variable */
211 static void _sg_cfg_cb__storage_mode(const char *name, int pos)
215 xbt_assert(_sg_cfg_init_status < 2,
216 "Cannot change the model after the initialization");
218 val = xbt_cfg_get_string(_sg_cfg_set, name);
220 if (!strcmp(val, "help")) {
221 model_help("storage", surf_storage_model_description);
225 /* New Module missing */
226 find_model_description(surf_storage_model_description, val);
229 /* callback of the workstation_model variable */
230 static void _sg_cfg_cb__network_model(const char *name, int pos)
234 xbt_assert(_sg_cfg_init_status < 2,
235 "Cannot change the model after the initialization");
237 val = xbt_cfg_get_string(_sg_cfg_set, name);
239 if (!strcmp(val, "help")) {
240 model_help("network", surf_network_model_description);
244 /* New Module missing */
245 find_model_description(surf_network_model_description, val);
248 /* callbacks of the network models values */
249 static void _sg_cfg_cb__tcp_gamma(const char *name, int pos)
251 sg_tcp_gamma = xbt_cfg_get_double(_sg_cfg_set, name);
254 static void _sg_cfg_cb__maxmin_precision(const char* name, int pos)
256 sg_maxmin_precision = xbt_cfg_get_double(_sg_cfg_set, name);
259 static void _sg_cfg_cb__surf_precision(const char* name, int pos)
261 sg_surf_precision = xbt_cfg_get_double(_sg_cfg_set, name);
264 static void _sg_cfg_cb__sender_gap(const char* name, int pos)
266 sg_sender_gap = xbt_cfg_get_double(_sg_cfg_set, name);
269 static void _sg_cfg_cb__latency_factor(const char *name, int pos)
271 sg_latency_factor = xbt_cfg_get_double(_sg_cfg_set, name);
274 static void _sg_cfg_cb__bandwidth_factor(const char *name, int pos)
276 sg_bandwidth_factor = xbt_cfg_get_double(_sg_cfg_set, name);
279 static void _sg_cfg_cb__weight_S(const char *name, int pos)
281 sg_weight_S_parameter = xbt_cfg_get_double(_sg_cfg_set, name);
285 /* callback of the mpi collectives */
286 static void _sg_cfg_cb__coll(const char *category,
287 s_mpi_coll_description_t * table,
288 const char *name, int pos)
292 xbt_assert(_sg_cfg_init_status < 2,
293 "Cannot change the model after the initialization");
295 val = xbt_cfg_get_string(_sg_cfg_set, name);
297 if (!strcmp(val, "help")) {
298 coll_help(category, table);
302 /* New Module missing */
303 find_coll_description(table, val, category);
305 static void _sg_cfg_cb__coll_gather(const char *name, int pos){
306 _sg_cfg_cb__coll("gather", mpi_coll_gather_description, name, pos);
308 static void _sg_cfg_cb__coll_allgather(const char *name, int pos){
309 _sg_cfg_cb__coll("allgather", mpi_coll_allgather_description, name, pos);
311 static void _sg_cfg_cb__coll_allgatherv(const char *name, int pos){
312 _sg_cfg_cb__coll("allgatherv", mpi_coll_allgatherv_description, name, pos);
314 static void _sg_cfg_cb__coll_allreduce(const char *name, int pos)
316 _sg_cfg_cb__coll("allreduce", mpi_coll_allreduce_description, name, pos);
318 static void _sg_cfg_cb__coll_alltoall(const char *name, int pos)
320 _sg_cfg_cb__coll("alltoall", mpi_coll_alltoall_description, name, pos);
322 static void _sg_cfg_cb__coll_alltoallv(const char *name, int pos)
324 _sg_cfg_cb__coll("alltoallv", mpi_coll_alltoallv_description, name, pos);
326 static void _sg_cfg_cb__coll_bcast(const char *name, int pos)
328 _sg_cfg_cb__coll("bcast", mpi_coll_bcast_description, name, pos);
330 static void _sg_cfg_cb__coll_reduce(const char *name, int pos)
332 _sg_cfg_cb__coll("reduce", mpi_coll_reduce_description, name, pos);
334 static void _sg_cfg_cb__coll_reduce_scatter(const char *name, int pos){
335 _sg_cfg_cb__coll("reduce_scatter", mpi_coll_reduce_scatter_description, name, pos);
337 static void _sg_cfg_cb__coll_scatter(const char *name, int pos){
338 _sg_cfg_cb__coll("scatter", mpi_coll_scatter_description, name, pos);
340 static void _sg_cfg_cb__coll_barrier(const char *name, int pos){
341 _sg_cfg_cb__coll("barrier", mpi_coll_barrier_description, name, pos);
344 static void _sg_cfg_cb__wtime_sleep(const char *name, int pos){
345 smpi_wtime_sleep = xbt_cfg_get_double(_sg_cfg_set, name);
348 static void _sg_cfg_cb__iprobe_sleep(const char *name, int pos){
349 smpi_iprobe_sleep = xbt_cfg_get_double(_sg_cfg_set, name);
352 static void _sg_cfg_cb__test_sleep(const char *name, int pos){
353 smpi_test_sleep = xbt_cfg_get_double(_sg_cfg_set, name);
360 /* callback of the inclusion path */
361 static void _sg_cfg_cb__surf_path(const char *name, int pos)
363 char *path = xbt_cfg_get_string_at(_sg_cfg_set, name, pos);
364 xbt_dynar_push(surf_path, &path);
367 /* callback to decide if we want to use the model-checking */
368 #include "xbt_modinter.h"
371 extern int _sg_do_model_check; /* this variable lives in xbt_main until I find a right location for it */
372 extern int _sg_do_model_check_record;
375 static void _sg_cfg_cb_model_check_replay(const char *name, int pos)
377 MC_record_path = xbt_cfg_get_string(_sg_cfg_set, name);
380 static void _sg_cfg_cb_model_check(const char *name, int pos)
383 _sg_do_model_check = xbt_cfg_get_boolean(_sg_cfg_set, name);
385 if (xbt_cfg_get_boolean(_sg_cfg_set, name)) {
386 xbt_die("You tried to activate the model-checking from the command line, but it was not compiled in. Change your settings in cmake, recompile and try again");
391 static void _sg_cfg_cb_model_check_record(const char *name, int pos)
394 _sg_do_model_check_record = xbt_cfg_get_boolean(_sg_cfg_set, name);
396 if (xbt_cfg_get_boolean(_sg_cfg_set, name)) {
397 xbt_die("You tried to activate the model-checking record from the command line, but it was not compiled in. Change your settings in cmake, recompile and try again");
402 extern int _sg_do_verbose_exit;
404 static void _sg_cfg_cb_verbose_exit(const char *name, int pos)
406 _sg_do_verbose_exit = xbt_cfg_get_boolean(_sg_cfg_set, name);
409 extern int _sg_do_clean_atexit;
411 static void _sg_cfg_cb_clean_atexit(const char *name, int pos)
413 _sg_do_clean_atexit = xbt_cfg_get_boolean(_sg_cfg_set, name);
416 static void _sg_cfg_cb_context_factory(const char *name, int pos)
418 smx_context_factory_name = xbt_cfg_get_string(_sg_cfg_set, name);
421 static void _sg_cfg_cb_context_stack_size(const char *name, int pos)
423 smx_context_stack_size_was_set = 1;
424 smx_context_stack_size = xbt_cfg_get_int(_sg_cfg_set, name) * 1024;
427 static void _sg_cfg_cb_context_guard_size(const char *name, int pos)
429 smx_context_guard_size_was_set = 1;
430 smx_context_guard_size = xbt_cfg_get_int(_sg_cfg_set, name) * xbt_pagesize;
433 static void _sg_cfg_cb_contexts_nthreads(const char *name, int pos)
435 SIMIX_context_set_nthreads(xbt_cfg_get_int(_sg_cfg_set, name));
438 static void _sg_cfg_cb_contexts_parallel_threshold(const char *name, int pos)
440 SIMIX_context_set_parallel_threshold(xbt_cfg_get_int(_sg_cfg_set, name));
443 static void _sg_cfg_cb_contexts_parallel_mode(const char *name, int pos)
445 const char* mode_name = xbt_cfg_get_string(_sg_cfg_set, name);
446 if (!strcmp(mode_name, "posix")) {
447 SIMIX_context_set_parallel_mode(XBT_PARMAP_POSIX);
449 else if (!strcmp(mode_name, "futex")) {
450 SIMIX_context_set_parallel_mode(XBT_PARMAP_FUTEX);
452 else if (!strcmp(mode_name, "busy_wait")) {
453 SIMIX_context_set_parallel_mode(XBT_PARMAP_BUSY_WAIT);
456 xbt_die("Command line setting of the parallel synchronization mode should "
457 "be one of \"posix\", \"futex\" or \"busy_wait\"");
461 static void _sg_cfg_cb__surf_network_coordinates(const char *name,
464 int val = xbt_cfg_get_boolean(_sg_cfg_set, name);
466 if (!COORD_HOST_LEVEL) {
467 COORD_HOST_LEVEL = xbt_lib_add_level(host_lib,xbt_dynar_free_voidp);
468 COORD_ASR_LEVEL = xbt_lib_add_level(as_router_lib,xbt_dynar_free_voidp);
471 if (COORD_HOST_LEVEL)
472 xbt_die("Setting of whether to use coordinate cannot be disabled once set.");
475 static void _sg_cfg_cb__surf_network_crosstraffic(const char *name,
478 sg_network_crosstraffic = xbt_cfg_get_boolean(_sg_cfg_set, name);
482 static void _sg_cfg_cb__gtnets_jitter(const char *name, int pos)
484 sg_gtnets_jitter = xbt_cfg_get_double(_sg_cfg_set, name);
487 static void _sg_cfg_cb__gtnets_jitter_seed(const char *name, int pos)
489 sg_gtnets_jitter_seed = xbt_cfg_get_int(_sg_cfg_set, name);
493 /* build description line with possible values */
494 static void describe_model(char *result,
495 const s_surf_model_description_t model_description[],
497 const char *description)
500 sprintf(result, "%s. Possible values: %s", description,
501 model_description[0].name ? model_description[0].name : "n/a");
503 for (i = 1; model_description[i].name; i++)
504 p += sprintf(p, ", %s", model_description[i].name);
506 ".\n (use 'help' as a value to see the long description of each %s)",
510 /* create the config set, register what should be and parse the command line*/
511 void sg_config_init(int *argc, char **argv)
513 char description[1024];
515 /* Create the configuration support */
516 if (_sg_cfg_init_status == 0) { /* Only create stuff if not already inited */
518 /* Plugins configuration */
519 describe_model(description, surf_plugin_description,
520 "plugin", "The plugins");
521 xbt_cfg_register(&_sg_cfg_set, "plugin", description,
522 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__plugin, NULL);
524 describe_model(description, surf_cpu_model_description,
525 "model", "The model to use for the CPU");
526 xbt_cfg_register(&_sg_cfg_set, "cpu/model", description,
527 xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__cpu_model, NULL);
528 xbt_cfg_setdefault_string(_sg_cfg_set, "cpu/model", "Cas01");
530 describe_model(description, surf_optimization_mode_description,
532 "The optimization modes to use for the CPU");
533 xbt_cfg_register(&_sg_cfg_set, "cpu/optim", description,
534 xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__optimization_mode, NULL);
535 xbt_cfg_setdefault_string(_sg_cfg_set, "cpu/optim", "Lazy");
537 describe_model(description, surf_storage_model_description,
538 "model", "The model to use for the storage");
539 xbt_cfg_register(&_sg_cfg_set, "storage/model", description,
540 xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__storage_mode, NULL);
541 xbt_cfg_setdefault_string(_sg_cfg_set, "storage/model", "default");
543 describe_model(description, surf_network_model_description,
544 "model", "The model to use for the network");
545 xbt_cfg_register(&_sg_cfg_set, "network/model", description,
546 xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__network_model, NULL);
547 xbt_cfg_setdefault_string(_sg_cfg_set, "network/model", "LV08");
549 describe_model(description, surf_optimization_mode_description,
551 "The optimization modes to use for the network");
552 xbt_cfg_register(&_sg_cfg_set, "network/optim", description,
553 xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__optimization_mode, NULL);
554 xbt_cfg_setdefault_string(_sg_cfg_set, "network/optim", "Lazy");
556 describe_model(description, surf_workstation_model_description,
557 "model", "The model to use for the workstation");
558 xbt_cfg_register(&_sg_cfg_set, "workstation/model", description,
559 xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__workstation_model, NULL);
560 xbt_cfg_setdefault_string(_sg_cfg_set, "workstation/model", "default");
562 describe_model(description, surf_vm_workstation_model_description,
563 "model", "The model to use for the vm workstation");
564 xbt_cfg_register(&_sg_cfg_set, "vm_workstation/model", description,
565 xbt_cfgelm_string, 1, 1, &_sg_cfg_cb__vm_workstation_model, NULL);
566 xbt_cfg_setdefault_string(_sg_cfg_set, "vm_workstation/model", "default");
568 xbt_cfg_register(&_sg_cfg_set, "network/TCP_gamma",
569 "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)",
570 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__tcp_gamma, NULL);
571 xbt_cfg_setdefault_double(_sg_cfg_set, "network/TCP_gamma", 4194304.0);
573 xbt_cfg_register(&_sg_cfg_set, "surf/precision",
574 "Numerical precision used when updating simulation times (hence this value is expressed in seconds)",
575 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__surf_precision, NULL);
576 xbt_cfg_setdefault_double(_sg_cfg_set, "surf/precision", 0.00001);
578 xbt_cfg_register(&_sg_cfg_set, "maxmin/precision",
579 "Numerical precision used when computing resource sharing (hence this value is expressed in ops/sec or bytes/sec)",
580 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__maxmin_precision, NULL);
581 xbt_cfg_setdefault_double(_sg_cfg_set, "maxmin/precision", 0.00001);
583 /* The parameters of network models */
585 xbt_cfg_register(&_sg_cfg_set, "network/sender_gap",
586 "Minimum gap between two overlapping sends",
587 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__sender_gap, NULL);
588 /* real default for "network/sender_gap" is set in network_smpi.cpp */
589 xbt_cfg_setdefault_double(_sg_cfg_set, "network/sender_gap", NAN);
591 xbt_cfg_register(&_sg_cfg_set, "network/latency_factor",
592 "Correction factor to apply to the provided latency (default value set by network model)",
593 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__latency_factor, NULL);
594 xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
596 xbt_cfg_register(&_sg_cfg_set, "network/bandwidth_factor",
597 "Correction factor to apply to the provided bandwidth (default value set by network model)",
598 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__bandwidth_factor, NULL);
599 xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 1.0);
601 xbt_cfg_register(&_sg_cfg_set, "network/weight_S",
602 "Correction factor to apply to the weight of competing streams (default value set by network model)",
603 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__weight_S, NULL);
604 /* real default for "network/weight_S" is set in network_*.cpp */
605 xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", NAN);
608 xbt_cfg_register(&_sg_cfg_set, "path",
609 "Lookup path for inclusions in platform and deployment XML files",
610 xbt_cfgelm_string, 1, 0, _sg_cfg_cb__surf_path, NULL);
612 xbt_cfg_register(&_sg_cfg_set, "cpu/maxmin_selective_update",
613 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)",
614 xbt_cfgelm_boolean, 1, 1, NULL, NULL);
615 xbt_cfg_setdefault_boolean(_sg_cfg_set, "cpu/maxmin_selective_update", "no");
617 xbt_cfg_register(&_sg_cfg_set, "network/maxmin_selective_update",
618 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)",
619 xbt_cfgelm_boolean, 1, 1, NULL, NULL);
620 xbt_cfg_setdefault_boolean(_sg_cfg_set, "network/maxmin_selective_update", "no");
622 /* Replay (this part is enabled event if MC it disabled) */
623 xbt_cfg_register(&_sg_cfg_set, "model-check/replay",
624 "Uenable replay mode with the given path",
625 xbt_cfgelm_string, 0, 1, _sg_cfg_cb_model_check_replay, NULL);
628 /* do model-checking */
629 xbt_cfg_register(&_sg_cfg_set, "model-check",
630 "Verify the system through model-checking instead of simulating it (EXPERIMENTAL)",
631 xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb_model_check, NULL);
632 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check", "no");
634 /* do model-checking-record */
635 xbt_cfg_register(&_sg_cfg_set, "model-check/record",
636 "Record the model-checking paths",
637 xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb_model_check_record, NULL);
638 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/record", "no");
640 /* do stateful model-checking */
641 xbt_cfg_register(&_sg_cfg_set, "model-check/checkpoint",
642 "Specify the amount of steps between checkpoints during stateful model-checking (default: 0 => stateless verification). "
643 "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.",
644 xbt_cfgelm_int, 1, 1, _mc_cfg_cb_checkpoint, NULL);
645 xbt_cfg_setdefault_int(_sg_cfg_set, "model-check/checkpoint", 0);
647 /* do stateful model-checking */
648 xbt_cfg_register(&_sg_cfg_set, "model-check/sparse-checkpoint",
649 "Use sparse per-page snapshots.",
650 xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_sparse_checkpoint, NULL);
651 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/sparse-checkpoint", "no");
653 /* do liveness model-checking */
654 xbt_cfg_register(&_sg_cfg_set, "model-check/property",
655 "Specify the name of the file containing the property. It must be the result of the ltl2ba program.",
656 xbt_cfgelm_string, 1, 1, _mc_cfg_cb_property, NULL);
657 xbt_cfg_setdefault_string(_sg_cfg_set, "model-check/property", "");
659 /* do communications determinism model-checking */
660 xbt_cfg_register(&_sg_cfg_set, "model-check/communications_determinism",
661 "Enable/disable the detection of determinism in the communications schemes",
662 xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_comms_determinism, NULL);
663 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/communications_determinism", "no");
665 /* do send determinism model-checking */
666 xbt_cfg_register(&_sg_cfg_set, "model-check/send_determinism",
667 "Enable/disable the detection of send-determinism in the communications schemes",
668 xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_send_determinism, NULL);
669 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/send_determinism", "no");
671 /* Specify the kind of model-checking reduction */
672 xbt_cfg_register(&_sg_cfg_set, "model-check/reduction",
673 "Specify the kind of exploration reduction (either none or DPOR)",
674 xbt_cfgelm_string, 1, 1, _mc_cfg_cb_reduce, NULL);
675 xbt_cfg_setdefault_string(_sg_cfg_set, "model-check/reduction", "dpor");
677 /* Enable/disable timeout for wait requests with model-checking */
678 xbt_cfg_register(&_sg_cfg_set, "model-check/timeout",
679 "Enable/Disable timeout for wait requests",
680 xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_timeout, NULL);
681 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/timeout", "no");
683 /* Enable/disable global hash computation with model-checking */
684 xbt_cfg_register(&_sg_cfg_set, "model-check/hash",
685 "Enable/Disable state hash for state comparison (exprimental)",
686 xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_hash, NULL);
687 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/hash", "no");
689 /* Set max depth exploration */
690 xbt_cfg_register(&_sg_cfg_set, "model-check/snapshot_fds",
691 "Whether file descriptors must be snapshoted",
692 xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_snapshot_fds, NULL);
693 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/snapshot_fds", "no");
695 /* Set max depth exploration */
696 xbt_cfg_register(&_sg_cfg_set, "model-check/max_depth",
697 "Specify the max depth of exploration (default : 1000)",
698 xbt_cfgelm_int, 1, 1, _mc_cfg_cb_max_depth, NULL);
699 xbt_cfg_setdefault_int(_sg_cfg_set, "model-check/max_depth", 1000);
701 /* Set number of visited state stored for state comparison reduction*/
702 xbt_cfg_register(&_sg_cfg_set, "model-check/visited",
703 "Specify the number of visited state stored for state comparison reduction. If value=5, the last 5 visited states are stored",
704 xbt_cfgelm_int, 1, 1, _mc_cfg_cb_visited, NULL);
705 xbt_cfg_setdefault_int(_sg_cfg_set, "model-check/visited", 0);
707 /* Set file name for dot output of graph state */
708 xbt_cfg_register(&_sg_cfg_set, "model-check/dot_output",
709 "Specify the name of dot file corresponding to graph state",
710 xbt_cfgelm_string, 1, 1, _mc_cfg_cb_dot_output, NULL);
711 xbt_cfg_setdefault_string(_sg_cfg_set, "model-check/dot_output", "");
713 /* Enable/disable non progressive cycles detection with model-checking */
714 xbt_cfg_register(&_sg_cfg_set, "model-check/termination",
715 "Enable/Disable non progressive cycle detection",
716 xbt_cfgelm_boolean, 1, 1, _mc_cfg_cb_termination, NULL);
717 xbt_cfg_setdefault_boolean(_sg_cfg_set, "model-check/termination", "no");
720 /* do verbose-exit */
721 xbt_cfg_register(&_sg_cfg_set, "verbose-exit",
722 "Activate the \"do nothing\" mode in Ctrl-C",
723 xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb_verbose_exit, NULL);
724 xbt_cfg_setdefault_boolean(_sg_cfg_set, "verbose-exit", "yes");
726 /* context factory */
727 const char *dflt_ctx_fact = "thread";
729 char *p = description +
731 "Context factory to use in SIMIX. Possible values: %s",
733 #ifdef CONTEXT_UCONTEXT
734 dflt_ctx_fact = "ucontext";
735 p += sprintf(p, ", %s", dflt_ctx_fact);
738 dflt_ctx_fact = "raw";
739 p += sprintf(p, ", %s", dflt_ctx_fact);
743 xbt_cfg_register(&_sg_cfg_set, "contexts/factory", description,
744 xbt_cfgelm_string, 1, 1, _sg_cfg_cb_context_factory, NULL);
745 xbt_cfg_setdefault_string(_sg_cfg_set, "contexts/factory", dflt_ctx_fact);
747 /* stack size of contexts in KiB */
748 xbt_cfg_register(&_sg_cfg_set, "contexts/stack_size",
749 "Stack size of contexts in KiB",
750 xbt_cfgelm_int, 1, 1, _sg_cfg_cb_context_stack_size, NULL);
751 xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/stack_size", 8*1024);
752 /* No, it was not set yet (the above setdefault() changed this to 1). */
753 smx_context_stack_size_was_set = 0;
755 /* guard size for contexts stacks in memory pages */
756 xbt_cfg_register(&_sg_cfg_set, "contexts/guard_size",
757 "Guard size for contexts stacks in memory pages",
758 xbt_cfgelm_int, 1, 1, _sg_cfg_cb_context_guard_size, NULL);
759 #if defined(_XBT_WIN32) || (PTH_STACKGROWTH != -1)
760 xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/guard_size", 0);
762 xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/guard_size", 1);
764 /* No, it was not set yet (the above setdefault() changed this to 1). */
765 smx_context_guard_size_was_set = 0;
767 /* number of parallel threads for user processes */
768 xbt_cfg_register(&_sg_cfg_set, "contexts/nthreads",
769 "Number of parallel threads used to execute user contexts",
770 xbt_cfgelm_int, 1, 1, _sg_cfg_cb_contexts_nthreads, NULL);
771 xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/nthreads", 1);
773 /* minimal number of user contexts to be run in parallel */
774 xbt_cfg_register(&_sg_cfg_set, "contexts/parallel_threshold",
775 "Minimal number of user contexts to be run in parallel (raw contexts only)",
776 xbt_cfgelm_int, 1, 1, _sg_cfg_cb_contexts_parallel_threshold, NULL);
777 xbt_cfg_setdefault_int(_sg_cfg_set, "contexts/parallel_threshold", 2);
779 /* synchronization mode for parallel user contexts */
780 xbt_cfg_register(&_sg_cfg_set, "contexts/synchro",
781 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)",
782 xbt_cfgelm_string, 1, 1, _sg_cfg_cb_contexts_parallel_mode, NULL);
784 xbt_cfg_setdefault_string(_sg_cfg_set, "contexts/synchro", "futex");
785 #else //No futex on mac and posix is unimplememted yet
786 xbt_cfg_setdefault_string(_sg_cfg_set, "contexts/synchro", "busy_wait");
789 xbt_cfg_register(&_sg_cfg_set, "network/coordinates",
790 "\"yes\" or \"no\", specifying whether we use a coordinate-based routing (as Vivaldi)",
791 xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb__surf_network_coordinates, NULL);
792 xbt_cfg_setdefault_boolean(_sg_cfg_set, "network/coordinates", "no");
794 xbt_cfg_register(&_sg_cfg_set, "network/crosstraffic",
795 "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)",
796 xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb__surf_network_crosstraffic, NULL);
797 xbt_cfg_setdefault_boolean(_sg_cfg_set, "network/crosstraffic", "no");
800 xbt_cfg_register(&_sg_cfg_set, "gtnets/jitter",
801 "Double value to oscillate the link latency, uniformly in random interval [-latency*gtnets_jitter,latency*gtnets_jitter)",
802 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__gtnets_jitter, NULL);
803 xbt_cfg_setdefault_double(_sg_cfg_set, "gtnets/jitter", 0.0);
805 xbt_cfg_register(&_sg_cfg_set, "gtnets/jitter_seed",
806 "Use a positive seed to reproduce jitted results, value must be in [1,1e8], default is 10",
807 xbt_cfgelm_int, 0, 1, _sg_cfg_cb__gtnets_jitter_seed, NULL);
808 xbt_cfg_setdefault_int(_sg_cfg_set, "gtnets/jitter_seed", 10);
811 xbt_cfg_register(&_sg_cfg_set, "ns3/TcpModel",
812 "The ns3 tcp model can be : NewReno or Reno or Tahoe",
813 xbt_cfgelm_string, 1, 1, NULL, NULL);
814 xbt_cfg_setdefault_string(_sg_cfg_set, "ns3/TcpModel", "default");
817 //For smpi/bw_factor and smpi/lat_factor
818 //Default value have to be "threshold0:value0;threshold1:value1;...;thresholdN:valueN"
819 //test is if( size >= thresholdN ) return valueN;
820 //Values can be modified with command line --cfg=smpi/bw_factor:"threshold0:value0;threshold1:value1;...;thresholdN:valueN"
821 // or with tag config put line <prop id="smpi/bw_factor" value="threshold0:value0;threshold1:value1;...;thresholdN:valueN"></prop>
822 // SMPI model can be used without enable_smpi, so keep this the ifdef.
823 xbt_cfg_register(&_sg_cfg_set, "smpi/bw_factor",
824 "Bandwidth factors for smpi.",
825 xbt_cfgelm_string, 1, 1, NULL, NULL);
826 xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/bw_factor", "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");
828 xbt_cfg_register(&_sg_cfg_set, "smpi/lat_factor",
829 "Latency factors for smpi.",
830 xbt_cfgelm_string, 1, 1, NULL, NULL);
831 xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/lat_factor", "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");
833 xbt_cfg_register(&_sg_cfg_set, "smpi/IB_penalty_factors",
834 "Correction factor to communications using Infiniband model with contention (default value based on Stampede cluster profiling)",
835 xbt_cfgelm_string, 1, 1, NULL, NULL);
836 xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/IB_penalty_factors", "0.965;0.925;1.35");
839 xbt_cfg_register(&_sg_cfg_set, "smpi/running_power",
840 "Power of the host running the simulation (in flop/s). Used to bench the operations.",
841 xbt_cfgelm_double, 1, 1, NULL, NULL);
842 xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/running_power", 20000.0);
844 xbt_cfg_register(&_sg_cfg_set, "smpi/display_timing",
845 "Boolean indicating whether we should display the timing after simulation.",
846 xbt_cfgelm_boolean, 1, 1, NULL, NULL);
847 xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/display_timing", "no");
849 xbt_cfg_register(&_sg_cfg_set, "smpi/simulate_computation",
850 "Boolean indicating whether the computational part of the simulated application should be simulated.",
851 xbt_cfgelm_boolean, 1, 1, NULL, NULL);
852 xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/simulate_computation", "yes");
854 xbt_cfg_register(&_sg_cfg_set, "smpi/use_shared_malloc",
855 "Boolean indicating whether we should use shared memory when using SMPI_SHARED_MALLOC. Allows user to disable it for debug purposes.",
856 xbt_cfgelm_boolean, 1, 1, NULL, NULL);
857 xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/use_shared_malloc", "yes");
859 xbt_cfg_register(&_sg_cfg_set, "smpi/cpu_threshold",
860 "Minimal computation time (in seconds) not discarded, or -1 for infinity.",
861 xbt_cfgelm_double, 1, 1, NULL, NULL);
862 xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/cpu_threshold", 1e-6);
864 xbt_cfg_register(&_sg_cfg_set, "smpi/async_small_thres",
865 "Maximal size of messages that are to be sent asynchronously, without waiting for the receiver",
866 xbt_cfgelm_int, 1, 1, NULL, NULL);
867 xbt_cfg_setdefault_int(_sg_cfg_set, "smpi/async_small_thres", 0);
869 xbt_cfg_register(&_sg_cfg_set, "smpi/send_is_detached_thres",
870 "Threshold of message size where MPI_Send stops behaving like MPI_Isend and becomes MPI_Ssend",
871 xbt_cfgelm_int, 1, 1, NULL, NULL);
872 xbt_cfg_setdefault_int(_sg_cfg_set, "smpi/send_is_detached_thres", 65536);
874 xbt_cfg_register(&_sg_cfg_set, "smpi/privatize_global_variables",
875 "Boolean indicating whether we should privatize global variable at runtime.",
876 xbt_cfgelm_boolean, 1, 1, NULL, NULL);
877 xbt_cfg_setdefault_boolean(_sg_cfg_set, "smpi/privatize_global_variables", "no");
879 xbt_cfg_register(&_sg_cfg_set, "smpi/os",
880 "Small messages timings (MPI_Send minimum time for small messages)",
881 xbt_cfgelm_string, 1, 1, NULL, NULL);
882 xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/os", "1:0:0:0:0");
884 xbt_cfg_register(&_sg_cfg_set, "smpi/ois",
885 "Small messages timings (MPI_Isend minimum time for small messages)",
886 xbt_cfgelm_string, 1, 1, NULL, NULL);
887 xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/ois", "1:0:0:0:0");
889 xbt_cfg_register(&_sg_cfg_set, "smpi/or",
890 "Small messages timings (MPI_Recv minimum time for small messages)",
891 xbt_cfgelm_string, 1, 1, NULL, NULL);
892 xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/or", "1:0:0:0:0");
894 xbt_cfg_register(&_sg_cfg_set, "smpi/iprobe",
895 "Minimum time to inject inside a call to MPI_Iprobe",
896 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__iprobe_sleep, NULL);
897 xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/iprobe", 1e-4);
899 xbt_cfg_register(&_sg_cfg_set, "smpi/test",
900 "Minimum time to inject inside a call to MPI_Test",
901 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__test_sleep, NULL);
902 xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/test", 1e-4);
904 xbt_cfg_register(&_sg_cfg_set, "smpi/wtime",
905 "Minimum time to inject inside a call to MPI_Wtime",
906 xbt_cfgelm_double, 1, 1, _sg_cfg_cb__wtime_sleep, NULL);
907 xbt_cfg_setdefault_double(_sg_cfg_set, "smpi/wtime", 0.0);
909 xbt_cfg_register(&_sg_cfg_set, "smpi/coll_selector",
910 "Which collective selector to use",
911 xbt_cfgelm_string, 1, 1, NULL, NULL);
912 xbt_cfg_setdefault_string(_sg_cfg_set, "smpi/coll_selector", "default");
914 xbt_cfg_register(&_sg_cfg_set, "smpi/gather",
915 "Which collective to use for gather",
916 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_gather, NULL);
918 xbt_cfg_register(&_sg_cfg_set, "smpi/allgather",
919 "Which collective to use for allgather",
920 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_allgather, NULL);
922 xbt_cfg_register(&_sg_cfg_set, "smpi/barrier",
923 "Which collective to use for barrier",
924 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_barrier, NULL);
926 xbt_cfg_register(&_sg_cfg_set, "smpi/reduce_scatter",
927 "Which collective to use for reduce_scatter",
928 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_reduce_scatter, NULL);
930 xbt_cfg_register(&_sg_cfg_set, "smpi/scatter",
931 "Which collective to use for scatter",
932 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_scatter, NULL);
934 xbt_cfg_register(&_sg_cfg_set, "smpi/allgatherv",
935 "Which collective to use for allgatherv",
936 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_allgatherv, NULL);
938 xbt_cfg_register(&_sg_cfg_set, "smpi/allreduce",
939 "Which collective to use for allreduce",
940 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_allreduce, NULL);
942 xbt_cfg_register(&_sg_cfg_set, "smpi/alltoall",
943 "Which collective to use for alltoall",
944 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_alltoall, NULL);
946 xbt_cfg_register(&_sg_cfg_set, "smpi/alltoallv",
947 "Which collective to use for alltoallv",
948 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_alltoallv, NULL);
950 xbt_cfg_register(&_sg_cfg_set, "smpi/bcast",
951 "Which collective to use for bcast",
952 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_bcast, NULL);
954 xbt_cfg_register(&_sg_cfg_set, "smpi/reduce",
955 "Which collective to use for reduce",
956 xbt_cfgelm_string, 0, 1, &_sg_cfg_cb__coll_reduce, NULL);
959 xbt_cfg_register(&_sg_cfg_set, "clean_atexit",
960 "\"yes\" or \"no\". \"yes\" enables all the cleanups of SimGrid (XBT,SIMIX,MSG) to be registered with atexit. \"no\" may be useful if your code segfaults when calling the exit function.",
961 xbt_cfgelm_boolean, 1, 1, _sg_cfg_cb_clean_atexit, NULL);
962 xbt_cfg_setdefault_boolean(_sg_cfg_set, "clean_atexit", "yes");
965 /* retrieves the current directory of the current process */
966 const char *initial_path = __surf_get_initial_path();
967 xbt_assert((initial_path),
968 "__surf_get_initial_path() failed! Can't resolves current Windows directory");
970 surf_path = xbt_dynar_new(sizeof(char *), NULL);
971 xbt_cfg_setdefault_string(_sg_cfg_set, "path", initial_path);
974 xbt_cfg_check(_sg_cfg_set);
975 _sg_cfg_init_status = 1;
977 sg_config_cmd_line(argc, argv);
979 xbt_mallocator_initialization_is_done(SIMIX_context_is_parallel());
982 XBT_WARN("Call to sg_config_init() after initialization ignored");
986 void sg_config_finalize(void)
988 if (!_sg_cfg_init_status)
989 return; /* Not initialized yet. Nothing to do */
991 xbt_cfg_free(&_sg_cfg_set);
992 _sg_cfg_init_status = 0;
995 /* Pick the right models for CPU, net and workstation, and call their model_init_preparse */
996 void surf_config_models_setup()
998 const char *workstation_model_name;
999 const char *vm_workstation_model_name;
1000 int workstation_id = -1;
1001 int vm_workstation_id = -1;
1002 char *network_model_name = NULL;
1003 char *cpu_model_name = NULL;
1004 int storage_id = -1;
1005 char *storage_model_name = NULL;
1007 workstation_model_name =
1008 xbt_cfg_get_string(_sg_cfg_set, "workstation/model");
1009 vm_workstation_model_name =
1010 xbt_cfg_get_string(_sg_cfg_set, "vm_workstation/model");
1011 network_model_name = xbt_cfg_get_string(_sg_cfg_set, "network/model");
1012 cpu_model_name = xbt_cfg_get_string(_sg_cfg_set, "cpu/model");
1013 storage_model_name = xbt_cfg_get_string(_sg_cfg_set, "storage/model");
1015 /* Check whether we use a net/cpu model differing from the default ones, in which case
1016 * we should switch to the "compound" workstation model to correctly dispatch stuff to
1017 * the right net/cpu models.
1020 if ((!xbt_cfg_is_default_value(_sg_cfg_set, "network/model") ||
1021 !xbt_cfg_is_default_value(_sg_cfg_set, "cpu/model")) &&
1022 xbt_cfg_is_default_value(_sg_cfg_set, "workstation/model")) {
1023 XBT_INFO("Switching workstation model to compound since you changed the network and/or cpu model(s)");
1024 workstation_model_name = "compound";
1025 xbt_cfg_set_string(_sg_cfg_set, "workstation/model", workstation_model_name);
1028 XBT_DEBUG("Workstation model: %s", workstation_model_name);
1030 find_model_description(surf_workstation_model_description,
1031 workstation_model_name);
1032 if (!strcmp(workstation_model_name, "compound")) {
1033 int network_id = -1;
1036 xbt_assert(cpu_model_name,
1037 "Set a cpu model to use with the 'compound' workstation model");
1039 xbt_assert(network_model_name,
1040 "Set a network model to use with the 'compound' workstation model");
1042 if(surf_cpu_model_init_preparse){
1043 surf_cpu_model_init_preparse();
1046 find_model_description(surf_cpu_model_description, cpu_model_name);
1047 surf_cpu_model_description[cpu_id].model_init_preparse();
1051 find_model_description(surf_network_model_description,
1052 network_model_name);
1053 surf_network_model_description[network_id].model_init_preparse();
1056 XBT_DEBUG("Call workstation_model_init");
1057 surf_workstation_model_description[workstation_id].model_init_preparse();
1059 XBT_DEBUG("Call vm_workstation_model_init");
1060 vm_workstation_id = find_model_description(surf_vm_workstation_model_description,
1061 vm_workstation_model_name);
1062 surf_vm_workstation_model_description[vm_workstation_id].model_init_preparse();
1064 XBT_DEBUG("Call storage_model_init");
1065 storage_id = find_model_description(surf_storage_model_description, storage_model_name);
1066 surf_storage_model_description[storage_id].model_init_preparse();
1070 int sg_cfg_is_default_value(const char *name)
1072 return xbt_cfg_is_default_value(_sg_cfg_set, name);
1075 int sg_cfg_get_int(const char* name)
1077 return xbt_cfg_get_int(_sg_cfg_set, name);
1080 double sg_cfg_get_double(const char* name)
1082 return xbt_cfg_get_double(_sg_cfg_set, name);
1085 char* sg_cfg_get_string(const char* name)
1087 return xbt_cfg_get_string(_sg_cfg_set, name);
1090 int sg_cfg_get_boolean(const char* name)
1092 return xbt_cfg_get_boolean(_sg_cfg_set, name);
1095 void sg_cfg_get_peer(const char *name, char **peer, int *port)
1097 xbt_cfg_get_peer(_sg_cfg_set, name, peer, port);
1100 xbt_dynar_t sg_cfg_get_dynar(const char* name)
1102 return xbt_cfg_get_dynar(_sg_cfg_set, name);