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 "smpi/smpi_interface.h"
27 #include "simgrid/instr.h"
28 #include "src/mc/mc_replay.h"
30 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_config, surf, "About the configuration of SimGrid");
33 /* 0: beginning of time (config cannot be changed yet);
34 * 1: initialized: cfg_set created (config can now be changed);
35 * 2: configured: command line parsed and config part of platform file was
36 * integrated also, platform construction ongoing or done.
37 * (Config cannot be changed anymore!)
39 int _sg_cfg_init_status = 0;
41 /* 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)
52 for (j = i = 1; i < *argc; i++) {
53 if (!strncmp(argv[i], "--cfg=", strlen("--cfg="))) {
54 char *opt = strchr(argv[i], '=');
57 xbt_cfg_set_parse(opt);
58 XBT_DEBUG("Did apply '%s' as config setting", opt);
59 } else if (!strcmp(argv[i], "--version")) {
60 printf("%s\n", SIMGRID_VERSION_STRING);
62 } else if (!strcmp(argv[i], "--cfg-help") || !strcmp(argv[i], "--help")) {
63 printf("Description of the configuration accepted by this simulator:\n");
67 "Each of these configurations can be used by adding\n"
68 " --cfg=<option name>:<option value>\n"
69 "to the command line.\n"
71 "For more information, please refer to:\n"
72 " --help-aliases for the list of all option aliases.\n"
73 " --help-logs and --help-log-categories for the details of logging output.\n"
74 " --help-models for a list of all models known by this simulator.\n"
75 " --help-tracing for the details of all tracing options known by this simulator.\n"
76 " --version to get SimGrid version information.\n"
80 } else if (!strcmp(argv[i], "--help-aliases")) {
81 printf("Here is a list of all deprecated option names, with their replacement.\n");
83 printf("Please consider using the recent names\n");
85 } else if (!strcmp(argv[i], "--help-models")) {
86 model_help("host", surf_host_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 (int 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)
116 xbt_assert(_sg_cfg_init_status < 2, "Cannot load a plugin after the initialization");
118 char *val = xbt_cfg_get_string(name);
119 if (val==nullptr || val[0] == '\0')
122 if (!strcmp(val, "help")) {
123 model_help("plugin", surf_plugin_description);
127 int plugin_id = find_model_description(surf_plugin_description, val);
128 surf_plugin_description[plugin_id].model_init_preparse();
131 /* callback of the host/model variable */
132 static void _sg_cfg_cb__host_model(const char *name)
134 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
136 char *val = xbt_cfg_get_string(name);
137 if (!strcmp(val, "help")) {
138 model_help("host", surf_host_model_description);
142 /* Make sure that the model exists */
143 find_model_description(surf_host_model_description, val);
146 /* callback of the vm/model variable */
147 static void _sg_cfg_cb__vm_model(const char *name)
149 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
151 char *val = xbt_cfg_get_string(name);
152 if (!strcmp(val, "help")) {
153 model_help("vm", surf_vm_model_description);
157 /* Make sure that the model exists */
158 find_model_description(surf_vm_model_description, val);
161 /* callback of the cpu/model variable */
162 static void _sg_cfg_cb__cpu_model(const char *name)
164 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
166 char *val = xbt_cfg_get_string(name);
167 if (!strcmp(val, "help")) {
168 model_help("CPU", surf_cpu_model_description);
172 /* New Module missing */
173 find_model_description(surf_cpu_model_description, val);
176 /* callback of the cpu/model variable */
177 static void _sg_cfg_cb__optimization_mode(const char *name)
179 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
181 char *val = xbt_cfg_get_string(name);
182 if (!strcmp(val, "help")) {
183 model_help("optimization", surf_optimization_mode_description);
187 /* New Module missing */
188 find_model_description(surf_optimization_mode_description, val);
191 /* callback of the cpu/model variable */
192 static void _sg_cfg_cb__storage_mode(const char *name)
194 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
196 char *val = xbt_cfg_get_string(name);
197 if (!strcmp(val, "help")) {
198 model_help("storage", surf_storage_model_description);
202 find_model_description(surf_storage_model_description, val);
205 /* callback of the network_model variable */
206 static void _sg_cfg_cb__network_model(const char *name)
208 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the model after the initialization");
210 char *val = xbt_cfg_get_string(name);
211 if (!strcmp(val, "help")) {
212 model_help("network", surf_network_model_description);
216 /* New Module missing */
217 find_model_description(surf_network_model_description, val);
221 /* callback of the mpi collectives: simply check that this is a valid name. It will be picked up in smpi_global.cpp */
222 static void _check_coll(const char *category,
223 s_mpi_coll_description_t * table,
226 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the collective algorithm after the initialization");
228 char *val = xbt_cfg_get_string(name);
229 if (val && !strcmp(val, "help")) {
230 coll_help(category, table);
234 find_coll_description(table, val, category);
236 static void _check_coll_gather(const char *name){
237 _check_coll("gather", mpi_coll_gather_description, name);
239 static void _check_coll_allgather(const char *name){
240 _check_coll("allgather", mpi_coll_allgather_description, name);
242 static void _check_coll_allgatherv(const char *name){
243 _check_coll("allgatherv", mpi_coll_allgatherv_description, name);
245 static void _check_coll_allreduce(const char *name)
247 _check_coll("allreduce", mpi_coll_allreduce_description, name);
249 static void _check_coll_alltoall(const char *name)
251 _check_coll("alltoall", mpi_coll_alltoall_description, name);
253 static void _check_coll_alltoallv(const char *name)
255 _check_coll("alltoallv", mpi_coll_alltoallv_description, name);
257 static void _check_coll_bcast(const char *name)
259 _check_coll("bcast", mpi_coll_bcast_description, name);
261 static void _check_coll_reduce(const char *name)
263 _check_coll("reduce", mpi_coll_reduce_description, name);
265 static void _check_coll_reduce_scatter(const char *name){
266 _check_coll("reduce_scatter", mpi_coll_reduce_scatter_description, name);
268 static void _check_coll_scatter(const char *name){
269 _check_coll("scatter", mpi_coll_scatter_description, name);
271 static void _check_coll_barrier(const char *name){
272 _check_coll("barrier", mpi_coll_barrier_description, name);
277 /* callback to decide if we want to use the model-checking */
278 #include "src/xbt_modinter.h"
280 static void _sg_cfg_cb_model_check_replay(const char *name) {
281 MC_record_path = xbt_cfg_get_string(name);
282 if (MC_record_path[0] == '\0')
283 MC_record_path = nullptr;
287 extern int _sg_do_model_check_record;
288 static void _sg_cfg_cb_model_check_record(const char *name) {
289 _sg_do_model_check_record = xbt_cfg_get_boolean(name);
293 extern int _sg_do_verbose_exit;
294 static void _sg_cfg_cb_verbose_exit(const char *name)
296 _sg_do_verbose_exit = xbt_cfg_get_boolean(name);
299 extern int _sg_do_clean_atexit;
300 static void _sg_cfg_cb_clean_atexit(const char *name)
302 _sg_do_clean_atexit = xbt_cfg_get_boolean(name);
305 static void _sg_cfg_cb_context_stack_size(const char *name)
307 smx_context_stack_size_was_set = 1;
308 smx_context_stack_size = xbt_cfg_get_int(name) * 1024;
311 static void _sg_cfg_cb_context_guard_size(const char *name)
313 smx_context_guard_size_was_set = 1;
314 smx_context_guard_size = xbt_cfg_get_int(name) * xbt_pagesize;
317 static void _sg_cfg_cb_contexts_nthreads(const char *name)
319 SIMIX_context_set_nthreads(xbt_cfg_get_int(name));
322 static void _sg_cfg_cb_contexts_parallel_threshold(const char *name)
324 SIMIX_context_set_parallel_threshold(xbt_cfg_get_int(name));
327 static void _sg_cfg_cb_contexts_parallel_mode(const char *name)
329 const char* mode_name = xbt_cfg_get_string(name);
330 if (!strcmp(mode_name, "posix")) {
331 SIMIX_context_set_parallel_mode(XBT_PARMAP_POSIX);
333 else if (!strcmp(mode_name, "futex")) {
334 SIMIX_context_set_parallel_mode(XBT_PARMAP_FUTEX);
336 else if (!strcmp(mode_name, "busy_wait")) {
337 SIMIX_context_set_parallel_mode(XBT_PARMAP_BUSY_WAIT);
340 xbt_die("Command line setting of the parallel synchronization mode should "
341 "be one of \"posix\", \"futex\" or \"busy_wait\"");
345 static void _sg_cfg_cb__surf_network_coordinates(const char *name)
347 static int already_set = 0;
348 int val = xbt_cfg_get_boolean(name);
351 COORD_HOST_LEVEL = sg_host_extension_create(xbt_dynar_free_voidp);
352 COORD_ASR_LEVEL = xbt_lib_add_level(as_router_lib,xbt_dynar_free_voidp);
357 xbt_die("Setting of whether to use coordinate cannot be disabled once set.");
360 static void _sg_cfg_cb__surf_network_crosstraffic(const char *name)
362 sg_network_crosstraffic = xbt_cfg_get_boolean(name);
365 /* build description line with possible values */
366 static void describe_model(char *result,int resultsize,
367 const s_surf_model_description_t model_description[],
369 const char *description)
373 p += snprintf(result,resultsize-1, "%s. Possible values: %s", description,
374 model_description[0].name ? model_description[0].name : "n/a");
375 for (int i = 1; model_description[i].name; i++)
376 p += snprintf(p,resultsize-(p-result)-1, ", %s", model_description[i].name);
377 p += snprintf(p,resultsize-(p-result)-1, ".\n (use 'help' as a value to see the long description of each %s)", name);
379 xbt_assert(p<result+resultsize-1,"Buffer too small to display the model description of %s",name);
382 /* create the config set, register what should be and parse the command line*/
383 void sg_config_init(int *argc, char **argv)
386 char description[1024];
388 /* Create the configuration support */
389 if (_sg_cfg_init_status == 0) { /* Only create stuff if not already inited */
391 /* Plugins configuration */
392 describe_model(description,descsize, surf_plugin_description, "plugin", "The plugins");
393 xbt_cfg_register_string("plugin", nullptr, &_sg_cfg_cb__plugin, description);
395 describe_model(description,descsize, surf_cpu_model_description, "model", "The model to use for the CPU");
396 xbt_cfg_register_string("cpu/model", "Cas01", &_sg_cfg_cb__cpu_model, description);
398 describe_model(description,descsize, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the CPU");
399 xbt_cfg_register_string("cpu/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
401 describe_model(description,descsize, surf_storage_model_description, "model", "The model to use for the storage");
402 xbt_cfg_register_string("storage/model", "default", &_sg_cfg_cb__storage_mode, description);
404 describe_model(description,descsize, surf_network_model_description, "model", "The model to use for the network");
405 xbt_cfg_register_string("network/model", "LV08", &_sg_cfg_cb__network_model, description);
407 describe_model(description,descsize, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the network");
408 xbt_cfg_register_string("network/optim", "Lazy", &_sg_cfg_cb__optimization_mode, description);
410 describe_model(description,descsize, surf_host_model_description, "model", "The model to use for the host");
411 xbt_cfg_register_string("host/model", "default", &_sg_cfg_cb__host_model, description);
413 describe_model(description,descsize, surf_vm_model_description, "model", "The model to use for the vm");
414 xbt_cfg_register_string("vm/model", "default", &_sg_cfg_cb__vm_model, description);
416 sg_tcp_gamma = 4194304.0;
417 simgrid::config::bindFlag(sg_tcp_gamma, { "network/TCP-gamma", "network/TCP_gamma" },
418 "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)");
420 sg_surf_precision = 0.00001;
421 simgrid::config::bindFlag(sg_surf_precision, "surf/precision",
422 "Numerical precision used when updating simulation times (in seconds)");
424 sg_maxmin_precision = 0.00001;
425 simgrid::config::bindFlag(sg_maxmin_precision, "maxmin/precision",
426 "Numerical precision used when computing resource sharing (in ops/sec or bytes/sec)");
428 sg_concurrency_limit = 100;
429 simgrid::config::bindFlag(sg_concurrency_limit, "maxmin/concurrency_limit",
430 "Maximum number of concurrent variables in the maxmim system. Also limits the number of processes on each host, at higher level");
432 /* The parameters of network models */
434 // real default for "network/sender-gap" is set in network_smpi.cpp:
436 simgrid::config::bindFlag(sg_sender_gap, { "network/sender-gap", "network/sender_gap" },
437 "Minimum gap between two overlapping sends");
439 sg_latency_factor = 1.0;
440 simgrid::config::bindFlag(sg_latency_factor, { "network/latency-factor", "network/latency_factor" },
441 "Correction factor to apply to the provided latency (default value set by network model)");
443 sg_bandwidth_factor = 1.0;
444 simgrid::config::bindFlag(sg_bandwidth_factor, { "network/bandwidth-factor", "network/bandwidth_factor" },
445 "Correction factor to apply to the provided bandwidth (default value set by network model)");
447 // real default for "network/weight-S" is set in network_*.cpp:
448 sg_weight_S_parameter = NAN;
449 simgrid::config::bindFlag(sg_weight_S_parameter, { "network/weight-S", "network/weight_S" },
450 "Correction factor to apply to the weight of competing streams (default value set by network model)");
453 simgrid::config::declareFlag<std::string>("path",
454 "Lookup path for inclusions in platform and deployment XML files",
456 [](std::string const& path) {
457 if (path[0] != '\0') {
458 char* copy = xbt_strdup(path.c_str());
459 xbt_dynar_push(surf_path, ©);
463 xbt_cfg_register_boolean("cpu/maxmin-selective-update", "no", nullptr,
464 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)");
465 xbt_cfg_register_alias("cpu/maxmin-selective-update","cpu/maxmin_selective_update");
466 xbt_cfg_register_boolean("network/maxmin-selective-update", "no", nullptr,
467 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)");
468 xbt_cfg_register_alias("network/maxmin-selective-update","network/maxmin_selective_update");
469 /* Replay (this part is enabled even if MC it disabled) */
470 xbt_cfg_register_string("model-check/replay", nullptr, _sg_cfg_cb_model_check_replay,
471 "Model-check path to replay (as reported by SimGrid when a violation is reported)");
474 /* do model-checking-record */
475 xbt_cfg_register_boolean("model-check/record", "no", _sg_cfg_cb_model_check_record, "Record the model-checking paths");
477 xbt_cfg_register_int("model-check/checkpoint", 0, _mc_cfg_cb_checkpoint,
478 "Specify the amount of steps between checkpoints during stateful model-checking (default: 0 => stateless verification). "
479 "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.");
481 xbt_cfg_register_boolean("model-check/sparse-checkpoint", "no", _mc_cfg_cb_sparse_checkpoint, "Use sparse per-page snapshots.");
482 xbt_cfg_register_boolean("model-check/ksm", "no", _mc_cfg_cb_ksm, "Kernel same-page merging");
484 xbt_cfg_register_string("model-check/property","", _mc_cfg_cb_property,
485 "Name of the file containing the property, as formated by the ltl2ba program.");
486 xbt_cfg_register_boolean("model-check/communications-determinism", "no", _mc_cfg_cb_comms_determinism,
487 "Whether to enable the detection of communication determinism");
488 xbt_cfg_register_alias("model-check/communications-determinism","model-check/communications_determinism");
490 xbt_cfg_register_boolean("model-check/send-determinism", "no", _mc_cfg_cb_send_determinism,
491 "Enable/disable the detection of send-determinism in the communications schemes");
492 xbt_cfg_register_alias("model-check/send-determinism","model-check/send_determinism");
494 /* Specify the kind of model-checking reduction */
495 xbt_cfg_register_string("model-check/reduction", "dpor", _mc_cfg_cb_reduce,
496 "Specify the kind of exploration reduction (either none or DPOR)");
497 xbt_cfg_register_boolean("model-check/timeout", "no", _mc_cfg_cb_timeout,
498 "Whether to enable timeouts for wait requests");
500 xbt_cfg_register_boolean("model-check/hash", "no", _mc_cfg_cb_hash, "Whether to enable state hash for state comparison (experimental)");
501 xbt_cfg_register_boolean("model-check/snapshot-fds", "no", _mc_cfg_cb_snapshot_fds,
502 "Whether file descriptors must be snapshoted (currently unusable)");
503 xbt_cfg_register_alias("model-check/snapshot-fds","model-check/snapshot_fds");
504 xbt_cfg_register_int("model-check/max-depth", 1000, _mc_cfg_cb_max_depth, "Maximal exploration depth (default: 1000)");
505 xbt_cfg_register_alias("model-check/max-depth","model-check/max_depth");
506 xbt_cfg_register_int("model-check/visited", 0, _mc_cfg_cb_visited,
507 "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.");
509 xbt_cfg_register_string("model-check/dot-output", "", _mc_cfg_cb_dot_output, "Name of dot output file corresponding to graph state");
510 xbt_cfg_register_alias("model-check/dot-output","model-check/dot_output");
511 xbt_cfg_register_boolean("model-check/termination", "no", _mc_cfg_cb_termination, "Whether to enable non progressive cycle detection");
514 xbt_cfg_register_boolean("verbose-exit", "yes", _sg_cfg_cb_verbose_exit, "Activate the \"do nothing\" mode in Ctrl-C");
516 xbt_cfg_register_int("contexts/stack-size", 8*1024, _sg_cfg_cb_context_stack_size, "Stack size of contexts in KiB");
517 /* (FIXME: this is unpleasant) Reset this static variable that was altered when setting the default value. */
518 smx_context_stack_size_was_set = 0;
519 xbt_cfg_register_alias("contexts/stack-size","contexts/stack_size");
521 /* guard size for contexts stacks in memory pages */
522 xbt_cfg_register_int("contexts/guard-size",
523 #if defined(_WIN32) || (PTH_STACKGROWTH != -1)
528 _sg_cfg_cb_context_guard_size, "Guard size for contexts stacks in memory pages");
529 /* No, it was not set yet (the above setdefault() changed this to 1). */
530 smx_context_guard_size_was_set = 0;
531 xbt_cfg_register_alias("contexts/guard-size","contexts/guard_size");
532 xbt_cfg_register_int("contexts/nthreads", 1, _sg_cfg_cb_contexts_nthreads, "Number of parallel threads used to execute user contexts");
534 xbt_cfg_register_int("contexts/parallel-threshold", 2, _sg_cfg_cb_contexts_parallel_threshold,
535 "Minimal number of user contexts to be run in parallel (raw contexts only)");
536 xbt_cfg_register_alias("contexts/parallel-threshold","contexts/parallel_threshold");
538 /* synchronization mode for parallel user contexts */
540 xbt_cfg_register_string("contexts/synchro", "futex", _sg_cfg_cb_contexts_parallel_mode,
541 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
542 #else //No futex on mac and posix is unimplememted yet
543 xbt_cfg_register_string("contexts/synchro", "busy_wait", _sg_cfg_cb_contexts_parallel_mode,
544 "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)");
547 xbt_cfg_register_boolean("network/coordinates", "no", _sg_cfg_cb__surf_network_coordinates,
548 "Whether we use a coordinate-based routing (as Vivaldi)");
550 xbt_cfg_register_boolean("network/crosstraffic", "yes", _sg_cfg_cb__surf_network_crosstraffic,
551 "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)");
553 //For smpi/bw_factor and smpi/lat_factor
554 // SMPI model can be used without enable_smpi, so keep this out of the ifdef.
555 xbt_cfg_register_string("smpi/bw-factor",
556 "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,
557 "Bandwidth factors for smpi. Format: 'threshold0:value0;threshold1:value1;...;thresholdN:valueN', meaning if(size >=thresholdN ) return valueN.");
558 xbt_cfg_register_alias("smpi/bw-factor","smpi/bw_factor");
560 xbt_cfg_register_string("smpi/lat-factor",
561 "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.");
562 xbt_cfg_register_alias("smpi/lat-factor","smpi/lat_factor");
564 xbt_cfg_register_string("smpi/IB-penalty-factors", "0.965;0.925;1.35", nullptr,
565 "Correction factor to communications using Infiniband model with contention (default value based on Stampede cluster profiling)");
566 xbt_cfg_register_alias("smpi/IB-penalty-factors","smpi/IB_penalty_factors");
569 xbt_cfg_register_double("smpi/running-power", 20000.0, nullptr, "Power of the host running the simulation (in flop/s). Used to bench the operations.");
570 xbt_cfg_register_alias("smpi/running-power","smpi/running_power");
572 xbt_cfg_register_boolean("smpi/display-timing", "no", nullptr, "Whether we should display the timing after simulation.");
573 xbt_cfg_register_alias("smpi/display-timing", "smpi/display_timing");
575 xbt_cfg_register_boolean("smpi/simulate-computation", "yes", nullptr, "Whether the computational part of the simulated application should be simulated.");
576 xbt_cfg_register_alias("smpi/simulate-computation","smpi/simulate_computation");
578 xbt_cfg_register_boolean("smpi/use-shared-malloc", "yes", nullptr, "Whether SMPI_SHARED_MALLOC is enabled. Disable it for debugging purposes.");
579 xbt_cfg_register_alias("smpi/use-shared-malloc", "smpi/use_shared_malloc");
581 xbt_cfg_register_double("smpi/cpu-threshold", 1e-6, nullptr, "Minimal computation time (in seconds) not discarded, or -1 for infinity.");
582 xbt_cfg_register_alias("smpi/cpu-threshold", "smpi/cpu_threshold");
584 xbt_cfg_register_int("smpi/async-small-thresh", 0, nullptr,
585 "Maximal size of messages that are to be sent asynchronously, without waiting for the receiver");
586 xbt_cfg_register_alias("smpi/async-small-thresh","smpi/async_small_thresh");
587 xbt_cfg_register_alias("smpi/async-small-thresh","smpi/async_small_thres");
589 xbt_cfg_register_boolean("smpi/trace-call-location", "no", nullptr, "Should filename and linenumber of MPI calls be traced?");
591 xbt_cfg_register_int("smpi/send-is-detached-thresh", 65536, nullptr,
592 "Threshold of message size where MPI_Send stops behaving like MPI_Isend and becomes MPI_Ssend");
593 xbt_cfg_register_alias("smpi/send-is-detached-thresh","smpi/send_is_detached_thresh");
594 xbt_cfg_register_alias("smpi/send-is-detached-thresh","smpi/send_is_detached_thres");
596 xbt_cfg_register_boolean("smpi/privatize-global-variables", "no", nullptr, "Whether we should privatize global variable at runtime.");
597 xbt_cfg_register_alias("smpi/privatize-global-variables", "smpi/privatize_global_variables");
600 xbt_cfg_register_string("smpi/papi-events", nullptr, nullptr, "This switch enables tracking the specified counters with PAPI");
602 xbt_cfg_register_string("smpi/comp-adjustment-file", nullptr, nullptr, "A file containing speedups or slowdowns for some parts of the code.");
603 xbt_cfg_register_string("smpi/os", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Send minimum time for small messages)");
604 xbt_cfg_register_string("smpi/ois", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Isend minimum time for small messages)");
605 xbt_cfg_register_string("smpi/or", "0:0:0:0:0", nullptr, "Small messages timings (MPI_Recv minimum time for small messages)");
607 xbt_cfg_register_string("smpi/coll-selector", "default", nullptr, "Which collective selector to use");
608 xbt_cfg_register_alias("smpi/coll-selector","smpi/coll_selector");
609 xbt_cfg_register_string("smpi/gather", nullptr, &_check_coll_gather, "Which collective to use for gather");
610 xbt_cfg_register_string("smpi/allgather", nullptr, &_check_coll_allgather, "Which collective to use for allgather");
611 xbt_cfg_register_string("smpi/barrier", nullptr, &_check_coll_barrier, "Which collective to use for barrier");
612 xbt_cfg_register_string("smpi/reduce-scatter",nullptr, &_check_coll_reduce_scatter, "Which collective to use for reduce_scatter");
613 xbt_cfg_register_alias("smpi/reduce-scatter","smpi/reduce_scatter");
614 xbt_cfg_register_string("smpi/scatter", nullptr, &_check_coll_scatter, "Which collective to use for scatter");
615 xbt_cfg_register_string("smpi/allgatherv", nullptr, &_check_coll_allgatherv, "Which collective to use for allgatherv");
616 xbt_cfg_register_string("smpi/allreduce", nullptr, &_check_coll_allreduce, "Which collective to use for allreduce");
617 xbt_cfg_register_string("smpi/alltoall", nullptr, &_check_coll_alltoall, "Which collective to use for alltoall");
618 xbt_cfg_register_string("smpi/alltoallv", nullptr, &_check_coll_alltoallv,"Which collective to use for alltoallv");
619 xbt_cfg_register_string("smpi/bcast", nullptr, &_check_coll_bcast, "Which collective to use for bcast");
620 xbt_cfg_register_string("smpi/reduce", nullptr, &_check_coll_reduce, "Which collective to use for reduce");
625 sg_storage_max_file_descriptors = 1024;
626 simgrid::config::bindFlag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
627 "Maximum number of concurrently opened files per host. Default is 1024");
631 xbt_cfg_register_boolean("exception/cutpath", "no", nullptr,
632 "Whether to cut all path information from call traces, used e.g. in exceptions.");
634 xbt_cfg_register_boolean("clean-atexit", "yes", _sg_cfg_cb_clean_atexit,
635 "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.");
636 xbt_cfg_register_alias("clean-atexit","clean_atexit");
639 /* retrieves the current directory of the current process */
640 const char *initial_path = __surf_get_initial_path();
641 xbt_assert((initial_path), "__surf_get_initial_path() failed! Can't resolve current Windows directory");
643 surf_path = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
644 xbt_cfg_setdefault_string("path", initial_path);
647 _sg_cfg_init_status = 1;
649 sg_config_cmd_line(argc, argv);
651 xbt_mallocator_initialization_is_done(SIMIX_context_is_parallel());
653 XBT_WARN("Call to sg_config_init() after initialization ignored");
657 void sg_config_finalize()
659 if (!_sg_cfg_init_status)
660 return; /* Not initialized yet. Nothing to do */
662 xbt_cfg_free(&simgrid_config);
663 _sg_cfg_init_status = 0;