1 /* Copyright (c) 2009-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 /* sg_config: configuration infrastructure for the simulation world */
8 #include "simgrid/sg_config.h"
9 #include "instr/instr_interface.h"
11 #include "simgrid/instr.h"
12 #include "simgrid/simix.h"
13 #include "simgrid_config.h" /* what was compiled in? */
14 #include "src/kernel/lmm/maxmin.hpp"
15 #include "src/mc/mc_replay.hpp"
16 #include "src/surf/surf_interface.hpp"
17 #include "surf/surf.hpp"
18 #include "xbt/config.h"
19 #include "xbt/config.hpp"
21 #include "xbt/mallocator.h"
23 #include "xbt/sysdep.h"
25 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_config, surf, "About the configuration of SimGrid");
28 /* 0: beginning of time (config cannot be changed yet);
29 * 1: initialized: cfg_set created (config can now be changed);
30 * 2: configured: command line parsed and config part of platform file was
31 * integrated also, platform construction ongoing or done.
32 * (Config cannot be changed anymore!)
34 int _sg_cfg_init_status = 0;
36 /* instruct the upper layer (simix or simdag) to exit as soon as possible */
37 int _sg_cfg_exit_asap = 0;
39 #define sg_cfg_exit_early() do { _sg_cfg_exit_asap = 1; return; } while (0)
41 /* Parse the command line, looking for options */
42 static void sg_config_cmd_line(int *argc, char **argv)
48 for (j = i = 1; i < *argc; i++) {
49 if (not strncmp(argv[i], "--cfg=", strlen("--cfg="))) {
50 char *opt = strchr(argv[i], '=');
53 xbt_cfg_set_parse(opt);
54 XBT_DEBUG("Did apply '%s' as config setting", opt);
55 } else if (not strcmp(argv[i], "--version")) {
56 printf("%s\n", SIMGRID_VERSION_STRING);
58 } else if (not strcmp(argv[i], "--cfg-help") || not strcmp(argv[i], "--help")) {
59 printf("Description of the configuration accepted by this simulator:\n");
63 "Each of these configurations can be used by adding\n"
64 " --cfg=<option name>:<option value>\n"
65 "to the command line.\n"
67 "For more information, please refer to:\n"
68 " --help-aliases for the list of all option aliases.\n"
69 " --help-logs and --help-log-categories for the details of logging output.\n"
70 " --help-models for a list of all models known by this simulator.\n"
71 " --help-tracing for the details of all tracing options known by this simulator.\n"
72 " --version to get SimGrid version information.\n"
76 } else if (not strcmp(argv[i], "--help-aliases")) {
77 printf("Here is a list of all deprecated option names, with their replacement.\n");
79 printf("Please consider using the recent names\n");
81 } else if (not strcmp(argv[i], "--help-models")) {
82 model_help("host", surf_host_model_description);
84 model_help("CPU", surf_cpu_model_description);
86 model_help("network", surf_network_model_description);
87 printf("\nLong description of all optimization levels accepted by the models of this simulator:\n");
88 for (int k = 0; surf_optimization_mode_description[k].name; k++)
90 surf_optimization_mode_description[k].name,
91 surf_optimization_mode_description[k].description);
92 printf("Both network and CPU models have 'Lazy' as default optimization level\n\n");
94 } else if (not strcmp(argv[i], "--help-tracing")) {
109 /* callback of the plugin variable */
110 static void _sg_cfg_cb__plugin(const char *name)
112 xbt_assert(_sg_cfg_init_status < 2, "Cannot load a plugin after the initialization");
114 std::string val = xbt_cfg_get_string(name);
119 model_help("plugin", surf_plugin_description);
123 int plugin_id = find_model_description(surf_plugin_description, val);
124 surf_plugin_description[plugin_id].model_init_preparse();
127 /* callback of the host/model variable */
128 static void _sg_cfg_cb__host_model(const char *name)
130 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
132 std::string val = xbt_cfg_get_string(name);
134 model_help("host", surf_host_model_description);
138 /* Make sure that the model exists */
139 find_model_description(surf_host_model_description, val);
142 /* callback of the cpu/model variable */
143 static void _sg_cfg_cb__cpu_model(const char *name)
145 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
147 std::string val = xbt_cfg_get_string(name);
149 model_help("CPU", surf_cpu_model_description);
153 /* New Module missing */
154 find_model_description(surf_cpu_model_description, val);
157 /* callback of the cpu/model variable */
158 static void _sg_cfg_cb__optimization_mode(const char *name)
160 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
162 std::string val = xbt_cfg_get_string(name);
164 model_help("optimization", surf_optimization_mode_description);
168 /* New Module missing */
169 find_model_description(surf_optimization_mode_description, val);
172 /* callback of the cpu/model variable */
173 static void _sg_cfg_cb__storage_mode(const char *name)
175 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
177 std::string val = xbt_cfg_get_string(name);
179 model_help("storage", surf_storage_model_description);
183 find_model_description(surf_storage_model_description, val);
186 /* callback of the network_model variable */
187 static void _sg_cfg_cb__network_model(const char *name)
189 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
191 std::string val = xbt_cfg_get_string(name);
193 model_help("network", surf_network_model_description);
197 /* New Module missing */
198 find_model_description(surf_network_model_description, val);
200 /* callback to decide if we want to use the model-checking */
201 #include "src/xbt_modinter.h"
203 static void _sg_cfg_cb_model_check_replay(const char *name) {
204 MC_record_path = xbt_cfg_get_string(name);
208 extern int _sg_do_model_check_record;
209 static void _sg_cfg_cb_model_check_record(const char *name) {
210 _sg_do_model_check_record = xbt_cfg_get_boolean(name);
214 extern int _sg_do_verbose_exit;
215 static void _sg_cfg_cb_verbose_exit(const char *name)
217 _sg_do_verbose_exit = xbt_cfg_get_boolean(name);
220 extern int _sg_do_clean_atexit;
221 static void _sg_cfg_cb_clean_atexit(const char *name)
223 _sg_do_clean_atexit = xbt_cfg_get_boolean(name);
226 static void _sg_cfg_cb_context_stack_size(const char *name)
228 smx_context_stack_size_was_set = 1;
229 smx_context_stack_size = xbt_cfg_get_int(name) * 1024;
232 static void _sg_cfg_cb_context_guard_size(const char *name)
234 smx_context_guard_size_was_set = 1;
235 smx_context_guard_size = xbt_cfg_get_int(name) * xbt_pagesize;
238 static void _sg_cfg_cb_contexts_nthreads(const char *name)
240 SIMIX_context_set_nthreads(xbt_cfg_get_int(name));
243 static void _sg_cfg_cb_contexts_parallel_threshold(const char *name)
245 SIMIX_context_set_parallel_threshold(xbt_cfg_get_int(name));
248 static void _sg_cfg_cb_contexts_parallel_mode(const char *name)
250 std::string mode_name = xbt_cfg_get_string(name);
251 if (mode_name == "posix") {
252 SIMIX_context_set_parallel_mode(XBT_PARMAP_POSIX);
253 } else if (mode_name == "futex") {
254 SIMIX_context_set_parallel_mode(XBT_PARMAP_FUTEX);
255 } else if (mode_name == "busy_wait") {
256 SIMIX_context_set_parallel_mode(XBT_PARMAP_BUSY_WAIT);
258 xbt_die("Command line setting of the parallel synchronization mode should "
259 "be one of \"posix\", \"futex\" or \"busy_wait\"");
263 static void _sg_cfg_cb__surf_network_crosstraffic(const char *name)
265 sg_network_crosstraffic = xbt_cfg_get_boolean(name);
268 /* build description line with possible values */
269 static void describe_model(char *result,int resultsize,
270 const s_surf_model_description_t model_description[],
272 const char *description)
276 p += snprintf(result,resultsize-1, "%s. Possible values: %s", description,
277 model_description[0].name ? model_description[0].name : "n/a");
278 for (int i = 1; model_description[i].name; i++)
279 p += snprintf(p,resultsize-(p-result)-1, ", %s", model_description[i].name);
280 p += snprintf(p,resultsize-(p-result)-1, ".\n (use 'help' as a value to see the long description of each %s)", name);
282 xbt_assert(p<result+resultsize-1,"Buffer too small to display the model description of %s",name);
285 /* create the config set, register what should be and parse the command line*/
286 void sg_config_init(int *argc, char **argv)
288 const int descsize = 1024;
289 char description[descsize];
291 /* Create the configuration support */
292 if (_sg_cfg_init_status != 0) { /* Only create stuff if not already inited */
293 XBT_WARN("Call to sg_config_init() after initialization ignored");
297 /* Plugins configuration */
298 describe_model(description, descsize, surf_plugin_description, "plugin", "The plugins");
299 xbt_cfg_register_string("plugin", "", &_sg_cfg_cb__plugin, description);
301 describe_model(description, descsize, surf_cpu_model_description, "model", "The model to use for the CPU");
302 xbt_cfg_register_string("cpu/model", "Cas01", &_sg_cfg_cb__cpu_model, description);
304 describe_model(description, descsize, surf_optimization_mode_description, "optimization mode",
305 "The optimization modes to use for the CPU");
306 xbt_cfg_register_string("cpu/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
308 describe_model(description, descsize, surf_storage_model_description, "model", "The model to use for the storage");
309 xbt_cfg_register_string("storage/model", "default", &_sg_cfg_cb__storage_mode, description);
311 describe_model(description, descsize, surf_network_model_description, "model", "The model to use for the network");
312 xbt_cfg_register_string("network/model", "LV08", &_sg_cfg_cb__network_model, description);
314 describe_model(description, descsize, surf_optimization_mode_description, "optimization mode",
315 "The optimization modes to use for the network");
316 xbt_cfg_register_string("network/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
318 describe_model(description, descsize, surf_host_model_description, "model", "The model to use for the host");
319 xbt_cfg_register_string("host/model", "default", &_sg_cfg_cb__host_model, description);
321 sg_tcp_gamma = 4194304.0;
322 simgrid::config::bindFlag(sg_tcp_gamma, {"network/TCP-gamma", "network/TCP_gamma"},
323 "Size of the biggest TCP window (cat /proc/sys/net/ipv4/tcp_[rw]mem for recv/send window; "
324 "Use the last given value, which is the max window size)");
326 simgrid::config::bindFlag(sg_surf_precision, "surf/precision",
327 "Numerical precision used when updating simulation times (in seconds)");
329 simgrid::config::bindFlag(sg_maxmin_precision, "maxmin/precision",
330 "Numerical precision used when computing resource sharing (in flops/sec or bytes/sec)");
332 simgrid::config::bindFlag(sg_concurrency_limit, "maxmin/concurrency-limit",
333 "Maximum number of concurrent variables in the maxmim system. Also limits the number of "
334 "processes on each host, at higher level. (default: -1 means no such limitation)");
335 xbt_cfg_register_alias("maxmin/concurrency-limit", "maxmin/concurrency_limit");
337 /* The parameters of network models */
339 sg_latency_factor = 13.01; // comes from the default LV08 network model
340 simgrid::config::bindFlag(sg_latency_factor, {"network/latency-factor", "network/latency_factor"},
341 "Correction factor to apply to the provided latency (default value set by network model)");
343 sg_bandwidth_factor = 0.97; // comes from the default LV08 network model
344 simgrid::config::bindFlag(
345 sg_bandwidth_factor, {"network/bandwidth-factor", "network/bandwidth_factor"},
346 "Correction factor to apply to the provided bandwidth (default value set by network model)");
348 sg_weight_S_parameter = 20537; // comes from the default LV08 network model
349 simgrid::config::bindFlag(
350 sg_weight_S_parameter, {"network/weight-S", "network/weight_S"},
351 "Correction factor to apply to the weight of competing streams (default value set by network model)");
354 simgrid::config::declareFlag<std::string>("path", "Lookup path for inclusions in platform and deployment XML files",
355 "", [](std::string const& path) {
356 if (path[0] != '\0') {
357 surf_path.push_back(path);
361 xbt_cfg_register_boolean("cpu/maxmin-selective-update", "no", nullptr, "Update the constraint set propagating "
362 "recursively to others constraints (off by "
363 "default when optim is set to lazy)");
364 xbt_cfg_register_alias("cpu/maxmin-selective-update", "cpu/maxmin_selective_update");
365 xbt_cfg_register_boolean("network/maxmin-selective-update", "no", nullptr, "Update the constraint set propagating "
366 "recursively to others constraints (off "
367 "by default when optim is set to lazy)");
368 xbt_cfg_register_alias("network/maxmin-selective-update", "network/maxmin_selective_update");
369 /* Replay (this part is enabled even if MC it disabled) */
370 xbt_cfg_register_string("model-check/replay", nullptr, _sg_cfg_cb_model_check_replay,
371 "Model-check path to replay (as reported by SimGrid when a violation is reported)");
374 /* do model-checking-record */
375 xbt_cfg_register_boolean("model-check/record", "no", _sg_cfg_cb_model_check_record, "Record the model-checking paths");
377 xbt_cfg_register_int("model-check/checkpoint", 0, _mc_cfg_cb_checkpoint,
378 "Specify the amount of steps between checkpoints during stateful model-checking (default: 0 => stateless verification). "
379 "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.");
381 xbt_cfg_register_boolean("model-check/sparse-checkpoint", "no", _mc_cfg_cb_sparse_checkpoint, "Use sparse per-page snapshots.");
382 xbt_cfg_register_boolean("model-check/ksm", "no", _mc_cfg_cb_ksm, "Kernel same-page merging");
384 xbt_cfg_register_string("model-check/property", "", _mc_cfg_cb_property,
385 "Name of the file containing the property, as formatted by the ltl2ba program.");
386 xbt_cfg_register_boolean("model-check/communications-determinism", "no", _mc_cfg_cb_comms_determinism,
387 "Whether to enable the detection of communication determinism");
388 xbt_cfg_register_alias("model-check/communications-determinism","model-check/communications_determinism");
390 xbt_cfg_register_boolean("model-check/send-determinism", "no", _mc_cfg_cb_send_determinism,
391 "Enable/disable the detection of send-determinism in the communications schemes");
392 xbt_cfg_register_alias("model-check/send-determinism","model-check/send_determinism");
394 /* Specify the kind of model-checking reduction */
395 xbt_cfg_register_string("model-check/reduction", "dpor", _mc_cfg_cb_reduce,
396 "Specify the kind of exploration reduction (either none or DPOR)");
397 xbt_cfg_register_boolean("model-check/timeout", "no", _mc_cfg_cb_timeout,
398 "Whether to enable timeouts for wait requests");
400 xbt_cfg_register_boolean("model-check/hash", "no", _mc_cfg_cb_hash, "Whether to enable state hash for state comparison (experimental)");
401 xbt_cfg_register_boolean("model-check/snapshot-fds", "no", _mc_cfg_cb_snapshot_fds,
402 "Whether file descriptors must be snapshoted (currently unusable)");
403 xbt_cfg_register_alias("model-check/snapshot-fds","model-check/snapshot_fds");
404 xbt_cfg_register_int("model-check/max-depth", 1000, _mc_cfg_cb_max_depth, "Maximal exploration depth (default: 1000)");
405 xbt_cfg_register_alias("model-check/max-depth","model-check/max_depth");
406 xbt_cfg_register_int("model-check/visited", 0, _mc_cfg_cb_visited,
407 "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.");
409 xbt_cfg_register_string("model-check/dot-output", "", _mc_cfg_cb_dot_output, "Name of dot output file corresponding to graph state");
410 xbt_cfg_register_alias("model-check/dot-output","model-check/dot_output");
411 xbt_cfg_register_boolean("model-check/termination", "no", _mc_cfg_cb_termination, "Whether to enable non progressive cycle detection");
414 xbt_cfg_register_boolean("verbose-exit", "yes", _sg_cfg_cb_verbose_exit, "Activate the \"do nothing\" mode in Ctrl-C");
416 xbt_cfg_register_int("contexts/stack-size", 8*1024, _sg_cfg_cb_context_stack_size, "Stack size of contexts in KiB");
417 /* (FIXME: this is unpleasant) Reset this static variable that was altered when setting the default value. */
418 smx_context_stack_size_was_set = 0;
419 xbt_cfg_register_alias("contexts/stack-size","contexts/stack_size");
421 /* guard size for contexts stacks in memory pages */
422 xbt_cfg_register_int("contexts/guard-size",
423 #if defined(_WIN32) || (PTH_STACKGROWTH != -1)
428 _sg_cfg_cb_context_guard_size, "Guard size for contexts stacks in memory pages");
429 /* No, it was not set yet (the above setdefault() changed this to 1). */
430 smx_context_guard_size_was_set = 0;
431 xbt_cfg_register_alias("contexts/guard-size","contexts/guard_size");
432 xbt_cfg_register_int("contexts/nthreads", 1, _sg_cfg_cb_contexts_nthreads, "Number of parallel threads used to execute user contexts");
434 xbt_cfg_register_int("contexts/parallel-threshold", 2, _sg_cfg_cb_contexts_parallel_threshold,
435 "Minimal number of user contexts to be run in parallel (raw contexts only)");
436 xbt_cfg_register_alias("contexts/parallel-threshold","contexts/parallel_threshold");
438 /* synchronization mode for parallel user contexts */
440 xbt_cfg_register_string("contexts/synchro", "futex", _sg_cfg_cb_contexts_parallel_mode,
441 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
442 #else //No futex on mac and posix is unimplememted yet
443 xbt_cfg_register_string("contexts/synchro", "busy_wait", _sg_cfg_cb_contexts_parallel_mode,
444 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
447 xbt_cfg_register_boolean("network/crosstraffic", "yes", _sg_cfg_cb__surf_network_crosstraffic,
448 "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)");
450 // For smpi/bw-factor and smpi/lat-factor
451 // SMPI model can be used without enable_smpi, so keep this out of the ifdef.
452 xbt_cfg_register_string("smpi/bw-factor",
453 "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", nullptr,
454 "Bandwidth factors for smpi. Format: 'threshold0:value0;threshold1:value1;...;thresholdN:valueN', meaning if(size >=thresholdN ) return valueN.");
455 xbt_cfg_register_alias("smpi/bw-factor","smpi/bw_factor");
457 xbt_cfg_register_string("smpi/lat-factor",
458 "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", nullptr, "Latency factors for smpi.");
459 xbt_cfg_register_alias("smpi/lat-factor","smpi/lat_factor");
461 xbt_cfg_register_string("smpi/IB-penalty-factors", "0.965;0.925;1.35", nullptr,
462 "Correction factor to communications using Infiniband model with contention (default value based on Stampede cluster profiling)");
463 xbt_cfg_register_alias("smpi/IB-penalty-factors","smpi/IB_penalty_factors");
466 xbt_cfg_register_double("smpi/host-speed", 20000.0, nullptr, "Speed of the host running the simulation (in flop/s). Used to bench the operations.");
467 xbt_cfg_register_alias("smpi/host-speed","smpi/running_power");
468 xbt_cfg_register_alias("smpi/host-speed","smpi/running-power");
470 xbt_cfg_register_boolean("smpi/keep-temps", "no", nullptr, "Whether we should keep the generated temporary files.");
472 xbt_cfg_register_boolean("smpi/display-timing", "no", nullptr, "Whether we should display the timing after simulation.");
473 xbt_cfg_register_alias("smpi/display-timing", "smpi/display_timing");
475 xbt_cfg_register_boolean("smpi/simulate-computation", "yes", nullptr, "Whether the computational part of the simulated application should be simulated.");
476 xbt_cfg_register_alias("smpi/simulate-computation","smpi/simulate_computation");
478 xbt_cfg_register_string("smpi/shared-malloc", "global", nullptr,
479 "Whether SMPI_SHARED_MALLOC is enabled. Disable it for debugging purposes.");
480 xbt_cfg_register_alias("smpi/shared-malloc", "smpi/use-shared-malloc");
481 xbt_cfg_register_alias("smpi/shared-malloc", "smpi/use_shared_malloc");
482 xbt_cfg_register_double("smpi/shared-malloc-blocksize", 1UL << 20, nullptr, "Size of the bogus file which will be created for global shared allocations");
483 xbt_cfg_register_string("smpi/shared-malloc-hugepage", "", nullptr,
484 "Path to a mounted hugetlbfs, to use huge pages with shared malloc.");
486 xbt_cfg_register_double("smpi/cpu-threshold", 1e-6, nullptr, "Minimal computation time (in seconds) not discarded, or -1 for infinity.");
487 xbt_cfg_register_alias("smpi/cpu-threshold", "smpi/cpu_threshold");
489 xbt_cfg_register_int("smpi/async-small-thresh", 0, nullptr,
490 "Maximal size of messages that are to be sent asynchronously, without waiting for the receiver");
491 xbt_cfg_register_alias("smpi/async-small-thresh","smpi/async_small_thresh");
492 xbt_cfg_register_alias("smpi/async-small-thresh","smpi/async_small_thres");
494 xbt_cfg_register_boolean("smpi/trace-call-location", "no", nullptr, "Should filename and linenumber of MPI calls be traced?");
496 xbt_cfg_register_int("smpi/send-is-detached-thresh", 65536, nullptr,
497 "Threshold of message size where MPI_Send stops behaving like MPI_Isend and becomes MPI_Ssend");
498 xbt_cfg_register_alias("smpi/send-is-detached-thresh","smpi/send_is_detached_thresh");
499 xbt_cfg_register_alias("smpi/send-is-detached-thresh","smpi/send_is_detached_thres");
501 const char* default_privatization = std::getenv("SMPI_PRIVATIZATION");
502 if (default_privatization == nullptr)
503 default_privatization = "no";
505 xbt_cfg_register_string("smpi/privatization", default_privatization, nullptr,
506 "How we should privatize global variable at runtime (no, yes, mmap, dlopen).");
508 xbt_cfg_register_alias("smpi/privatization", "smpi/privatize-global-variables");
509 xbt_cfg_register_alias("smpi/privatization", "smpi/privatize_global_variables");
511 xbt_cfg_register_boolean("smpi/grow-injected-times", "yes", nullptr, "Whether we want to make the injected time in MPI_Iprobe and MPI_Test grow, to allow faster simulation. This can make simulation less precise, though.");
514 xbt_cfg_register_string("smpi/papi-events", nullptr, nullptr, "This switch enables tracking the specified counters with PAPI");
516 xbt_cfg_register_string("smpi/comp-adjustment-file", nullptr, nullptr, "A file containing speedups or slowdowns for some parts of the code.");
517 xbt_cfg_register_string("smpi/os", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Send minimum time for small messages)");
518 xbt_cfg_register_string("smpi/ois", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Isend minimum time for small messages)");
519 xbt_cfg_register_string("smpi/or", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Recv minimum time for small messages)");
521 xbt_cfg_register_double("smpi/iprobe-cpu-usage", 1, nullptr, "Maximum usage of CPUs by MPI_Iprobe() calls. We've observed that MPI_Iprobes consume significantly less power than the maximum of a specific application. This value is then (Iprobe_Usage/Max_Application_Usage).");
523 xbt_cfg_register_string("smpi/coll-selector", "default", nullptr, "Which collective selector to use");
524 xbt_cfg_register_alias("smpi/coll-selector","smpi/coll_selector");
525 xbt_cfg_register_string("smpi/gather", nullptr, nullptr, "Which collective to use for gather");
526 xbt_cfg_register_string("smpi/allgather", nullptr, nullptr, "Which collective to use for allgather");
527 xbt_cfg_register_string("smpi/barrier", nullptr, nullptr, "Which collective to use for barrier");
528 xbt_cfg_register_string("smpi/reduce_scatter",nullptr, nullptr, "Which collective to use for reduce_scatter");
529 xbt_cfg_register_alias("smpi/reduce_scatter","smpi/reduce-scatter");
530 xbt_cfg_register_string("smpi/scatter", nullptr, nullptr, "Which collective to use for scatter");
531 xbt_cfg_register_string("smpi/allgatherv", nullptr, nullptr, "Which collective to use for allgatherv");
532 xbt_cfg_register_string("smpi/allreduce", nullptr, nullptr, "Which collective to use for allreduce");
533 xbt_cfg_register_string("smpi/alltoall", nullptr, nullptr, "Which collective to use for alltoall");
534 xbt_cfg_register_string("smpi/alltoallv", nullptr, nullptr,"Which collective to use for alltoallv");
535 xbt_cfg_register_string("smpi/bcast", nullptr, nullptr, "Which collective to use for bcast");
536 xbt_cfg_register_string("smpi/reduce", nullptr, nullptr, "Which collective to use for reduce");
541 sg_storage_max_file_descriptors = 1024;
542 simgrid::config::bindFlag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
543 "Maximum number of concurrently opened files per host. Default is 1024");
547 xbt_cfg_register_boolean("exception/cutpath", "no", nullptr,
548 "Whether to cut all path information from call traces, used e.g. in exceptions.");
550 xbt_cfg_register_boolean("clean-atexit", "yes", _sg_cfg_cb_clean_atexit,
551 "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.");
552 xbt_cfg_register_alias("clean-atexit","clean_atexit");
554 if (surf_path.empty())
555 xbt_cfg_setdefault_string("path", "./");
557 _sg_cfg_init_status = 1;
559 sg_config_cmd_line(argc, argv);
561 xbt_mallocator_initialization_is_done(SIMIX_context_is_parallel());
564 void sg_config_finalize()
566 if (not _sg_cfg_init_status)
567 return; /* Not initialized yet. Nothing to do */
569 xbt_cfg_free(&simgrid_config);
570 _sg_cfg_init_status = 0;