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"
11 #include "xbt/config.hpp"
13 #include "xbt/mallocator.h"
16 #include "xbt/sysdep.h"
17 #include "surf/surf.h"
18 #include "surf/maxmin.h"
19 #include "instr/instr_interface.h"
20 #include "simgrid/simix.h"
21 #include "simgrid/sg_config.h"
22 #include "simgrid_config.h" /* what was compiled in? */
24 #include "simgrid/instr.h"
25 #include "src/mc/mc_replay.h"
26 #include "src/surf/surf_interface.hpp"
28 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_config, surf, "About the configuration of SimGrid");
31 /* 0: beginning of time (config cannot be changed yet);
32 * 1: initialized: cfg_set created (config can now be changed);
33 * 2: configured: command line parsed and config part of platform file was
34 * integrated also, platform construction ongoing or done.
35 * (Config cannot be changed anymore!)
37 int _sg_cfg_init_status = 0;
39 /* instruct the upper layer (simix or simdag) to exit as soon as possible */
40 int _sg_cfg_exit_asap = 0;
42 #define sg_cfg_exit_early() do { _sg_cfg_exit_asap = 1; return; } while (0)
44 /* Parse the command line, looking for options */
45 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);
118 if (val==nullptr || val[0] == '\0')
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 cpu/model variable */
146 static void _sg_cfg_cb__cpu_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("CPU", surf_cpu_model_description);
156 /* New Module missing */
157 find_model_description(surf_cpu_model_description, val);
160 /* callback of the cpu/model variable */
161 static void _sg_cfg_cb__optimization_mode(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("optimization", surf_optimization_mode_description);
171 /* New Module missing */
172 find_model_description(surf_optimization_mode_description, val);
175 /* callback of the cpu/model variable */
176 static void _sg_cfg_cb__storage_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("storage", surf_storage_model_description);
186 find_model_description(surf_storage_model_description, val);
189 /* callback of the network_model variable */
190 static void _sg_cfg_cb__network_model(const char *name)
192 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
194 char *val = xbt_cfg_get_string(name);
195 if (!strcmp(val, "help")) {
196 model_help("network", surf_network_model_description);
200 /* New Module missing */
201 find_model_description(surf_network_model_description, val);
203 /* callback to decide if we want to use the model-checking */
204 #include "src/xbt_modinter.h"
206 static void _sg_cfg_cb_model_check_replay(const char *name) {
207 MC_record_path = xbt_cfg_get_string(name);
208 if (MC_record_path[0] == '\0')
209 MC_record_path = nullptr;
213 extern int _sg_do_model_check_record;
214 static void _sg_cfg_cb_model_check_record(const char *name) {
215 _sg_do_model_check_record = xbt_cfg_get_boolean(name);
219 extern int _sg_do_verbose_exit;
220 static void _sg_cfg_cb_verbose_exit(const char *name)
222 _sg_do_verbose_exit = xbt_cfg_get_boolean(name);
225 extern int _sg_do_clean_atexit;
226 static void _sg_cfg_cb_clean_atexit(const char *name)
228 _sg_do_clean_atexit = xbt_cfg_get_boolean(name);
231 static void _sg_cfg_cb_context_stack_size(const char *name)
233 smx_context_stack_size_was_set = 1;
234 smx_context_stack_size = xbt_cfg_get_int(name) * 1024;
237 static void _sg_cfg_cb_context_guard_size(const char *name)
239 smx_context_guard_size_was_set = 1;
240 smx_context_guard_size = xbt_cfg_get_int(name) * xbt_pagesize;
243 static void _sg_cfg_cb_contexts_nthreads(const char *name)
245 SIMIX_context_set_nthreads(xbt_cfg_get_int(name));
248 static void _sg_cfg_cb_contexts_parallel_threshold(const char *name)
250 SIMIX_context_set_parallel_threshold(xbt_cfg_get_int(name));
253 static void _sg_cfg_cb_contexts_parallel_mode(const char *name)
255 const char* mode_name = xbt_cfg_get_string(name);
256 if (!strcmp(mode_name, "posix")) {
257 SIMIX_context_set_parallel_mode(XBT_PARMAP_POSIX);
259 else if (!strcmp(mode_name, "futex")) {
260 SIMIX_context_set_parallel_mode(XBT_PARMAP_FUTEX);
262 else if (!strcmp(mode_name, "busy_wait")) {
263 SIMIX_context_set_parallel_mode(XBT_PARMAP_BUSY_WAIT);
266 xbt_die("Command line setting of the parallel synchronization mode should "
267 "be one of \"posix\", \"futex\" or \"busy_wait\"");
271 static void _sg_cfg_cb__surf_network_crosstraffic(const char *name)
273 sg_network_crosstraffic = xbt_cfg_get_boolean(name);
276 /* build description line with possible values */
277 static void describe_model(char *result,int resultsize,
278 const s_surf_model_description_t model_description[],
280 const char *description)
284 p += snprintf(result,resultsize-1, "%s. Possible values: %s", description,
285 model_description[0].name ? model_description[0].name : "n/a");
286 for (int i = 1; model_description[i].name; i++)
287 p += snprintf(p,resultsize-(p-result)-1, ", %s", model_description[i].name);
288 p += snprintf(p,resultsize-(p-result)-1, ".\n (use 'help' as a value to see the long description of each %s)", name);
290 xbt_assert(p<result+resultsize-1,"Buffer too small to display the model description of %s",name);
293 /* create the config set, register what should be and parse the command line*/
294 void sg_config_init(int *argc, char **argv)
296 const int descsize = 1024;
297 char description[descsize];
299 /* Create the configuration support */
300 if (_sg_cfg_init_status == 0) { /* Only create stuff if not already inited */
302 /* Plugins configuration */
303 describe_model(description,descsize, surf_plugin_description, "plugin", "The plugins");
304 xbt_cfg_register_string("plugin", nullptr, &_sg_cfg_cb__plugin, description);
306 describe_model(description,descsize, surf_cpu_model_description, "model", "The model to use for the CPU");
307 xbt_cfg_register_string("cpu/model", "Cas01", &_sg_cfg_cb__cpu_model, description);
309 describe_model(description,descsize, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the CPU");
310 xbt_cfg_register_string("cpu/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
312 describe_model(description,descsize, surf_storage_model_description, "model", "The model to use for the storage");
313 xbt_cfg_register_string("storage/model", "default", &_sg_cfg_cb__storage_mode, description);
315 describe_model(description,descsize, surf_network_model_description, "model", "The model to use for the network");
316 xbt_cfg_register_string("network/model", "LV08", &_sg_cfg_cb__network_model, description);
318 describe_model(description,descsize, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the network");
319 xbt_cfg_register_string("network/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
321 describe_model(description,descsize, surf_host_model_description, "model", "The model to use for the host");
322 xbt_cfg_register_string("host/model", "default", &_sg_cfg_cb__host_model, description);
324 sg_tcp_gamma = 4194304.0;
325 simgrid::config::bindFlag(sg_tcp_gamma, { "network/TCP-gamma", "network/TCP_gamma" },
326 "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)");
328 simgrid::config::bindFlag(sg_surf_precision, "surf/precision",
329 "Numerical precision used when updating simulation times (in seconds)");
331 simgrid::config::bindFlag(sg_maxmin_precision, "maxmin/precision",
332 "Numerical precision used when computing resource sharing (in flops/sec or bytes/sec)");
334 simgrid::config::bindFlag(sg_concurrency_limit, "maxmin/concurrency-limit",
335 "Maximum number of concurrent variables in the maxmim system. Also limits the number of "
336 "processes on each host, at higher level. (default: -1 means no such limitation)");
337 xbt_cfg_register_alias("maxmin/concurrency-limit", "maxmin/concurrency_limit");
339 /* The parameters of network models */
341 // real default for "network/sender-gap" is set in network_smpi.cpp:
343 simgrid::config::bindFlag(sg_sender_gap, { "network/sender-gap", "network/sender_gap" },
344 "Minimum gap between two overlapping sends");
346 sg_latency_factor = 1.0;
347 simgrid::config::bindFlag(sg_latency_factor, { "network/latency-factor", "network/latency_factor" },
348 "Correction factor to apply to the provided latency (default value set by network model)");
350 sg_bandwidth_factor = 1.0;
351 simgrid::config::bindFlag(sg_bandwidth_factor, { "network/bandwidth-factor", "network/bandwidth_factor" },
352 "Correction factor to apply to the provided bandwidth (default value set by network model)");
354 // real default for "network/weight-S" is set in network_*.cpp:
355 sg_weight_S_parameter = NAN;
356 simgrid::config::bindFlag(sg_weight_S_parameter, { "network/weight-S", "network/weight_S" },
357 "Correction factor to apply to the weight of competing streams (default value set by network model)");
360 simgrid::config::declareFlag<std::string>("path",
361 "Lookup path for inclusions in platform and deployment XML files",
363 [](std::string const& path) {
364 if (path[0] != '\0') {
365 surf_path.push_back(path);
369 xbt_cfg_register_boolean("cpu/maxmin-selective-update", "no", nullptr,
370 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)");
371 xbt_cfg_register_alias("cpu/maxmin-selective-update","cpu/maxmin_selective_update");
372 xbt_cfg_register_boolean("network/maxmin-selective-update", "no", nullptr,
373 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)");
374 xbt_cfg_register_alias("network/maxmin-selective-update","network/maxmin_selective_update");
375 /* Replay (this part is enabled even if MC it disabled) */
376 xbt_cfg_register_string("model-check/replay", nullptr, _sg_cfg_cb_model_check_replay,
377 "Model-check path to replay (as reported by SimGrid when a violation is reported)");
380 /* do model-checking-record */
381 xbt_cfg_register_boolean("model-check/record", "no", _sg_cfg_cb_model_check_record, "Record the model-checking paths");
383 xbt_cfg_register_int("model-check/checkpoint", 0, _mc_cfg_cb_checkpoint,
384 "Specify the amount of steps between checkpoints during stateful model-checking (default: 0 => stateless verification). "
385 "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.");
387 xbt_cfg_register_boolean("model-check/sparse-checkpoint", "no", _mc_cfg_cb_sparse_checkpoint, "Use sparse per-page snapshots.");
388 xbt_cfg_register_boolean("model-check/ksm", "no", _mc_cfg_cb_ksm, "Kernel same-page merging");
390 xbt_cfg_register_string("model-check/property","", _mc_cfg_cb_property,
391 "Name of the file containing the property, as formated by the ltl2ba program.");
392 xbt_cfg_register_boolean("model-check/communications-determinism", "no", _mc_cfg_cb_comms_determinism,
393 "Whether to enable the detection of communication determinism");
394 xbt_cfg_register_alias("model-check/communications-determinism","model-check/communications_determinism");
396 xbt_cfg_register_boolean("model-check/send-determinism", "no", _mc_cfg_cb_send_determinism,
397 "Enable/disable the detection of send-determinism in the communications schemes");
398 xbt_cfg_register_alias("model-check/send-determinism","model-check/send_determinism");
400 /* Specify the kind of model-checking reduction */
401 xbt_cfg_register_string("model-check/reduction", "dpor", _mc_cfg_cb_reduce,
402 "Specify the kind of exploration reduction (either none or DPOR)");
403 xbt_cfg_register_boolean("model-check/timeout", "no", _mc_cfg_cb_timeout,
404 "Whether to enable timeouts for wait requests");
406 xbt_cfg_register_boolean("model-check/hash", "no", _mc_cfg_cb_hash, "Whether to enable state hash for state comparison (experimental)");
407 xbt_cfg_register_boolean("model-check/snapshot-fds", "no", _mc_cfg_cb_snapshot_fds,
408 "Whether file descriptors must be snapshoted (currently unusable)");
409 xbt_cfg_register_alias("model-check/snapshot-fds","model-check/snapshot_fds");
410 xbt_cfg_register_int("model-check/max-depth", 1000, _mc_cfg_cb_max_depth, "Maximal exploration depth (default: 1000)");
411 xbt_cfg_register_alias("model-check/max-depth","model-check/max_depth");
412 xbt_cfg_register_int("model-check/visited", 0, _mc_cfg_cb_visited,
413 "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.");
415 xbt_cfg_register_string("model-check/dot-output", "", _mc_cfg_cb_dot_output, "Name of dot output file corresponding to graph state");
416 xbt_cfg_register_alias("model-check/dot-output","model-check/dot_output");
417 xbt_cfg_register_boolean("model-check/termination", "no", _mc_cfg_cb_termination, "Whether to enable non progressive cycle detection");
420 xbt_cfg_register_boolean("verbose-exit", "yes", _sg_cfg_cb_verbose_exit, "Activate the \"do nothing\" mode in Ctrl-C");
422 xbt_cfg_register_int("contexts/stack-size", 8*1024, _sg_cfg_cb_context_stack_size, "Stack size of contexts in KiB");
423 /* (FIXME: this is unpleasant) Reset this static variable that was altered when setting the default value. */
424 smx_context_stack_size_was_set = 0;
425 xbt_cfg_register_alias("contexts/stack-size","contexts/stack_size");
427 /* guard size for contexts stacks in memory pages */
428 xbt_cfg_register_int("contexts/guard-size",
429 #if defined(_WIN32) || (PTH_STACKGROWTH != -1)
434 _sg_cfg_cb_context_guard_size, "Guard size for contexts stacks in memory pages");
435 /* No, it was not set yet (the above setdefault() changed this to 1). */
436 smx_context_guard_size_was_set = 0;
437 xbt_cfg_register_alias("contexts/guard-size","contexts/guard_size");
438 xbt_cfg_register_int("contexts/nthreads", 1, _sg_cfg_cb_contexts_nthreads, "Number of parallel threads used to execute user contexts");
440 xbt_cfg_register_int("contexts/parallel-threshold", 2, _sg_cfg_cb_contexts_parallel_threshold,
441 "Minimal number of user contexts to be run in parallel (raw contexts only)");
442 xbt_cfg_register_alias("contexts/parallel-threshold","contexts/parallel_threshold");
444 /* synchronization mode for parallel user contexts */
446 xbt_cfg_register_string("contexts/synchro", "futex", _sg_cfg_cb_contexts_parallel_mode,
447 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
448 #else //No futex on mac and posix is unimplememted yet
449 xbt_cfg_register_string("contexts/synchro", "busy_wait", _sg_cfg_cb_contexts_parallel_mode,
450 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
453 xbt_cfg_register_boolean("network/crosstraffic", "yes", _sg_cfg_cb__surf_network_crosstraffic,
454 "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)");
456 //For smpi/bw_factor and smpi/lat_factor
457 // SMPI model can be used without enable_smpi, so keep this out of the ifdef.
458 xbt_cfg_register_string("smpi/bw-factor",
459 "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,
460 "Bandwidth factors for smpi. Format: 'threshold0:value0;threshold1:value1;...;thresholdN:valueN', meaning if(size >=thresholdN ) return valueN.");
461 xbt_cfg_register_alias("smpi/bw-factor","smpi/bw_factor");
463 xbt_cfg_register_string("smpi/lat-factor",
464 "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.");
465 xbt_cfg_register_alias("smpi/lat-factor","smpi/lat_factor");
467 xbt_cfg_register_string("smpi/IB-penalty-factors", "0.965;0.925;1.35", nullptr,
468 "Correction factor to communications using Infiniband model with contention (default value based on Stampede cluster profiling)");
469 xbt_cfg_register_alias("smpi/IB-penalty-factors","smpi/IB_penalty_factors");
472 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.");
473 xbt_cfg_register_alias("smpi/host-speed","smpi/running_power");
474 xbt_cfg_register_alias("smpi/host-speed","smpi/running-power");
476 xbt_cfg_register_boolean("smpi/keep-temps", "no", nullptr, "Whether we should keep the generated temporary files.");
478 xbt_cfg_register_boolean("smpi/display-timing", "no", nullptr, "Whether we should display the timing after simulation.");
479 xbt_cfg_register_alias("smpi/display-timing", "smpi/display_timing");
481 xbt_cfg_register_boolean("smpi/simulate-computation", "yes", nullptr, "Whether the computational part of the simulated application should be simulated.");
482 xbt_cfg_register_alias("smpi/simulate-computation","smpi/simulate_computation");
484 xbt_cfg_register_string("smpi/shared-malloc", "global", nullptr,
485 "Whether SMPI_SHARED_MALLOC is enabled. Disable it for debugging purposes.");
486 xbt_cfg_register_alias("smpi/shared-malloc", "smpi/use-shared-malloc");
487 xbt_cfg_register_alias("smpi/shared-malloc", "smpi/use_shared_malloc");
488 xbt_cfg_register_double("smpi/shared-malloc-blocksize", 1UL << 20, nullptr, "Size of the bogus file which will be created for global shared allocations");
489 xbt_cfg_register_string("smpi/shared-malloc-hugepage", "", nullptr,
490 "Path to a mounted hugetlbfs, to use huge pages with shared malloc.");
492 xbt_cfg_register_double("smpi/cpu-threshold", 1e-6, nullptr, "Minimal computation time (in seconds) not discarded, or -1 for infinity.");
493 xbt_cfg_register_alias("smpi/cpu-threshold", "smpi/cpu_threshold");
495 xbt_cfg_register_int("smpi/async-small-thresh", 0, nullptr,
496 "Maximal size of messages that are to be sent asynchronously, without waiting for the receiver");
497 xbt_cfg_register_alias("smpi/async-small-thresh","smpi/async_small_thresh");
498 xbt_cfg_register_alias("smpi/async-small-thresh","smpi/async_small_thres");
500 xbt_cfg_register_boolean("smpi/trace-call-location", "no", nullptr, "Should filename and linenumber of MPI calls be traced?");
502 xbt_cfg_register_int("smpi/send-is-detached-thresh", 65536, nullptr,
503 "Threshold of message size where MPI_Send stops behaving like MPI_Isend and becomes MPI_Ssend");
504 xbt_cfg_register_alias("smpi/send-is-detached-thresh","smpi/send_is_detached_thresh");
505 xbt_cfg_register_alias("smpi/send-is-detached-thresh","smpi/send_is_detached_thres");
507 const char* default_privatization = std::getenv("SMPI_PRIVATIZATION");
508 if (default_privatization == nullptr)
509 default_privatization = "no";
511 xbt_cfg_register_string("smpi/privatization", default_privatization, nullptr,
512 "How we should privatize global variable at runtime (no, yes, mmap, dlopen).");
514 xbt_cfg_register_alias("smpi/privatization", "smpi/privatize-global-variables");
515 xbt_cfg_register_alias("smpi/privatization", "smpi/privatize_global_variables");
517 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.");
520 xbt_cfg_register_string("smpi/papi-events", nullptr, nullptr, "This switch enables tracking the specified counters with PAPI");
522 xbt_cfg_register_string("smpi/comp-adjustment-file", nullptr, nullptr, "A file containing speedups or slowdowns for some parts of the code.");
523 xbt_cfg_register_string("smpi/os", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Send minimum time for small messages)");
524 xbt_cfg_register_string("smpi/ois", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Isend minimum time for small messages)");
525 xbt_cfg_register_string("smpi/or", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Recv minimum time for small messages)");
527 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).");
529 xbt_cfg_register_string("smpi/coll-selector", "default", nullptr, "Which collective selector to use");
530 xbt_cfg_register_alias("smpi/coll-selector","smpi/coll_selector");
531 xbt_cfg_register_string("smpi/gather", nullptr, nullptr, "Which collective to use for gather");
532 xbt_cfg_register_string("smpi/allgather", nullptr, nullptr, "Which collective to use for allgather");
533 xbt_cfg_register_string("smpi/barrier", nullptr, nullptr, "Which collective to use for barrier");
534 xbt_cfg_register_string("smpi/reduce_scatter",nullptr, nullptr, "Which collective to use for reduce_scatter");
535 xbt_cfg_register_alias("smpi/reduce_scatter","smpi/reduce-scatter");
536 xbt_cfg_register_string("smpi/scatter", nullptr, nullptr, "Which collective to use for scatter");
537 xbt_cfg_register_string("smpi/allgatherv", nullptr, nullptr, "Which collective to use for allgatherv");
538 xbt_cfg_register_string("smpi/allreduce", nullptr, nullptr, "Which collective to use for allreduce");
539 xbt_cfg_register_string("smpi/alltoall", nullptr, nullptr, "Which collective to use for alltoall");
540 xbt_cfg_register_string("smpi/alltoallv", nullptr, nullptr,"Which collective to use for alltoallv");
541 xbt_cfg_register_string("smpi/bcast", nullptr, nullptr, "Which collective to use for bcast");
542 xbt_cfg_register_string("smpi/reduce", nullptr, nullptr, "Which collective to use for reduce");
547 sg_storage_max_file_descriptors = 1024;
548 simgrid::config::bindFlag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
549 "Maximum number of concurrently opened files per host. Default is 1024");
553 xbt_cfg_register_boolean("exception/cutpath", "no", nullptr,
554 "Whether to cut all path information from call traces, used e.g. in exceptions.");
556 xbt_cfg_register_boolean("clean-atexit", "yes", _sg_cfg_cb_clean_atexit,
557 "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.");
558 xbt_cfg_register_alias("clean-atexit","clean_atexit");
560 if (surf_path.empty()) {
561 /* retrieves the current directory of the current process */
562 const char *initial_path = __surf_get_initial_path();
563 xbt_assert((initial_path), "__surf_get_initial_path() failed! Can't resolve current Windows directory");
565 xbt_cfg_setdefault_string("path", initial_path);
568 _sg_cfg_init_status = 1;
570 sg_config_cmd_line(argc, argv);
572 xbt_mallocator_initialization_is_done(SIMIX_context_is_parallel());
574 XBT_WARN("Call to sg_config_init() after initialization ignored");
578 void sg_config_finalize()
580 if (!_sg_cfg_init_status)
581 return; /* Not initialized yet. Nothing to do */
583 xbt_cfg_free(&simgrid_config);
584 _sg_cfg_init_status = 0;