1 /* Copyright (c) 2009-2010, 2012-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 /* sg_config: configuration infrastructure for the simulation world */
10 #include "xbt/config.h"
12 #include "xbt/mallocator.h"
15 #include "xbt/sysdep.h"
16 #include "surf/surf.h"
17 #include "surf/maxmin.h"
18 #include "instr/instr_interface.h"
19 #include "simgrid/simix.h"
20 #include "simgrid/sg_config.h"
21 #include "simgrid_config.h" /* what was compiled in? */
23 #include "smpi/smpi_interface.h"
26 #include "simgrid/instr.h"
27 #include "src/mc/mc_replay.h"
29 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_config, surf, "About the configuration of SimGrid");
32 /* 0: beginning of time (config cannot be changed yet);
33 * 1: initialized: cfg_set created (config can now be changed);
34 * 2: configured: command line parsed and config part of platform file was
35 * integrated also, platform construction ongoing or done.
36 * (Config cannot be changed anymore!)
38 int _sg_cfg_init_status = 0;
40 /* instruct the upper layer (simix or simdag) to exit as soon as possible */
41 int _sg_cfg_exit_asap = 0;
43 #define sg_cfg_exit_early() do { _sg_cfg_exit_asap = 1; return; } while (0)
45 /* Parse the command line, looking for options */
46 static void sg_config_cmd_line(int *argc, char **argv)
52 for (j = i = 1; i < *argc; i++) {
53 if (!strncmp(argv[i], "--cfg=", strlen("--cfg="))) {
54 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");
64 xbt_cfg_help(simgrid_config);
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");
82 xbt_cfg_aliases(simgrid_config);
83 printf("Please consider using the recent names\n");
85 } else if (!strcmp(argv[i], "--help-models")) {
88 model_help("host", surf_host_model_description);
90 model_help("CPU", surf_cpu_model_description);
92 model_help("network", surf_network_model_description);
93 printf("\nLong description of all optimization levels accepted by the models of this simulator:\n");
94 for (k = 0; surf_optimization_mode_description[k].name; k++)
96 surf_optimization_mode_description[k].name,
97 surf_optimization_mode_description[k].description);
98 printf("Both network and CPU models have 'Lazy' as default optimization level\n\n");
100 } else if (!strcmp(argv[i], "--help-tracing")) {
115 /* callback of the plugin variable */
116 static void _sg_cfg_cb__plugin(const char *name, int pos)
118 xbt_assert(_sg_cfg_init_status < 2, "Cannot load a plugin after the initialization");
120 char *val = xbt_cfg_get_string(name);
121 if (!strcmp(val, "help")) {
122 model_help("plugin", surf_plugin_description);
126 /* New Module missing */
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, int pos)
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, int pos)
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, int pos)
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, int pos)
181 xbt_assert(_sg_cfg_init_status < 2,
182 "Cannot change the model after the initialization");
184 val = xbt_cfg_get_string(name);
186 if (!strcmp(val, "help")) {
187 model_help("optimization", surf_optimization_mode_description);
191 /* New Module missing */
192 find_model_description(surf_optimization_mode_description, val);
195 /* callback of the cpu/model variable */
196 static void _sg_cfg_cb__storage_mode(const char *name, int pos)
200 xbt_assert(_sg_cfg_init_status < 2,
201 "Cannot change the model after the initialization");
203 val = xbt_cfg_get_string(name);
205 if (!strcmp(val, "help")) {
206 model_help("storage", surf_storage_model_description);
210 /* New Module missing */
211 find_model_description(surf_storage_model_description, val);
214 /* callback of the network_model variable */
215 static void _sg_cfg_cb__network_model(const char *name, int pos)
219 xbt_assert(_sg_cfg_init_status < 2,
220 "Cannot change the model after the initialization");
222 val = xbt_cfg_get_string(name);
224 if (!strcmp(val, "help")) {
225 model_help("network", surf_network_model_description);
229 /* New Module missing */
230 find_model_description(surf_network_model_description, val);
233 /* callbacks of the network models values */
234 static void _sg_cfg_cb__tcp_gamma(const char *name, int pos)
236 sg_tcp_gamma = xbt_cfg_get_double(name);
239 static void _sg_cfg_cb__maxmin_precision(const char* name, int pos)
241 sg_maxmin_precision = xbt_cfg_get_double(name);
244 static void _sg_cfg_cb__surf_precision(const char* name, int pos)
246 sg_surf_precision = xbt_cfg_get_double(name);
249 static void _sg_cfg_cb__sender_gap(const char* name, int pos)
251 sg_sender_gap = xbt_cfg_get_double(name);
254 static void _sg_cfg_cb__latency_factor(const char *name, int pos)
256 sg_latency_factor = xbt_cfg_get_double(name);
259 static void _sg_cfg_cb__bandwidth_factor(const char *name, int pos)
261 sg_bandwidth_factor = xbt_cfg_get_double(name);
264 static void _sg_cfg_cb__weight_S(const char *name, int pos)
266 sg_weight_S_parameter = xbt_cfg_get_double(name);
270 /* callback of the mpi collectives: simply check that this is a valid name. It will be picked up in smpi_global.cpp */
271 static void _check_coll(const char *category,
272 s_mpi_coll_description_t * table,
275 xbt_assert(_sg_cfg_init_status < 2, "Cannot change the collective algorithm after the initialization");
277 char *val = xbt_cfg_get_string(name);
279 if (val && !strcmp(val, "help")) {
280 coll_help(category, table);
284 find_coll_description(table, val, category);
286 static void _check_coll_gather(const char *name, int pos){
287 _check_coll("gather", mpi_coll_gather_description, name);
289 static void _check_coll_allgather(const char *name, int pos){
290 _check_coll("allgather", mpi_coll_allgather_description, name);
292 static void _check_coll_allgatherv(const char *name, int pos){
293 _check_coll("allgatherv", mpi_coll_allgatherv_description, name);
295 static void _check_coll_allreduce(const char *name, int pos)
297 _check_coll("allreduce", mpi_coll_allreduce_description, name);
299 static void _check_coll_alltoall(const char *name, int pos)
301 _check_coll("alltoall", mpi_coll_alltoall_description, name);
303 static void _check_coll_alltoallv(const char *name, int pos)
305 _check_coll("alltoallv", mpi_coll_alltoallv_description, name);
307 static void _check_coll_bcast(const char *name, int pos)
309 _check_coll("bcast", mpi_coll_bcast_description, name);
311 static void _check_coll_reduce(const char *name, int pos)
313 _check_coll("reduce", mpi_coll_reduce_description, name);
315 static void _check_coll_reduce_scatter(const char *name, int pos){
316 _check_coll("reduce_scatter", mpi_coll_reduce_scatter_description, name);
318 static void _check_coll_scatter(const char *name, int pos){
319 _check_coll("scatter", mpi_coll_scatter_description, name);
321 static void _check_coll_barrier(const char *name, int pos){
322 _check_coll("barrier", mpi_coll_barrier_description, name);
325 static void _sg_cfg_cb__wtime_sleep(const char *name, int pos){
326 smpi_wtime_sleep = xbt_cfg_get_double(name);
329 static void _sg_cfg_cb__iprobe_sleep(const char *name, int pos){
330 smpi_iprobe_sleep = xbt_cfg_get_double(name);
333 static void _sg_cfg_cb__test_sleep(const char *name, int pos){
334 smpi_test_sleep = xbt_cfg_get_double(name);
341 /* callback of the inclusion path */
342 static void _sg_cfg_cb__surf_path(const char *name, int pos)
344 char *path = xbt_strdup(xbt_cfg_get_string_at(simgrid_config, name, pos));
345 if (path[0]) // ignore ""
346 xbt_dynar_push(surf_path, &path);
349 /* callback to decide if we want to use the model-checking */
350 #include "src/xbt_modinter.h"
353 extern int _sg_do_model_check; /* this variable lives in xbt_main until I find a right location for it */
354 extern int _sg_do_model_check_record;
357 static void _sg_cfg_cb_model_check_replay(const char *name, int pos) {
358 MC_record_path = xbt_cfg_get_string(name);
362 static void _sg_cfg_cb_model_check_record(const char *name, int pos) {
363 _sg_do_model_check_record = xbt_cfg_get_boolean(name);
367 extern int _sg_do_verbose_exit;
369 static void _sg_cfg_cb_verbose_exit(const char *name, int pos)
371 _sg_do_verbose_exit = xbt_cfg_get_boolean(name);
374 extern int _sg_do_clean_atexit;
376 static void _sg_cfg_cb_clean_atexit(const char *name, int pos)
378 _sg_do_clean_atexit = xbt_cfg_get_boolean(name);
381 static void _sg_cfg_cb_context_factory(const char *name, int pos)
383 smx_context_factory_name = xbt_cfg_get_string(name);
386 static void _sg_cfg_cb_context_stack_size(const char *name, int pos)
388 smx_context_stack_size_was_set = 1;
389 smx_context_stack_size = xbt_cfg_get_int(name) * 1024;
392 static void _sg_cfg_cb_context_guard_size(const char *name, int pos)
394 smx_context_guard_size_was_set = 1;
395 smx_context_guard_size = xbt_cfg_get_int(name) * xbt_pagesize;
398 static void _sg_cfg_cb_contexts_nthreads(const char *name, int pos)
400 SIMIX_context_set_nthreads(xbt_cfg_get_int(name));
403 static void _sg_cfg_cb_contexts_parallel_threshold(const char *name, int pos)
405 SIMIX_context_set_parallel_threshold(xbt_cfg_get_int(name));
408 static void _sg_cfg_cb_contexts_parallel_mode(const char *name, int pos)
410 const char* mode_name = xbt_cfg_get_string(name);
411 if (!strcmp(mode_name, "posix")) {
412 SIMIX_context_set_parallel_mode(XBT_PARMAP_POSIX);
414 else if (!strcmp(mode_name, "futex")) {
415 SIMIX_context_set_parallel_mode(XBT_PARMAP_FUTEX);
417 else if (!strcmp(mode_name, "busy_wait")) {
418 SIMIX_context_set_parallel_mode(XBT_PARMAP_BUSY_WAIT);
421 xbt_die("Command line setting of the parallel synchronization mode should "
422 "be one of \"posix\", \"futex\" or \"busy_wait\"");
426 static void _sg_cfg_cb__surf_network_coordinates(const char *name,
429 static int already_set = 0;
430 int val = xbt_cfg_get_boolean(name);
433 COORD_HOST_LEVEL = sg_host_extension_create(xbt_dynar_free_voidp);
434 COORD_ASR_LEVEL = xbt_lib_add_level(as_router_lib,xbt_dynar_free_voidp);
439 xbt_die("Setting of whether to use coordinate cannot be disabled once set.");
442 static void _sg_cfg_cb__surf_network_crosstraffic(const char *name,
445 sg_network_crosstraffic = xbt_cfg_get_boolean(name);
448 /* build description line with possible values */
449 static void describe_model(char *result,
450 const s_surf_model_description_t model_description[],
452 const char *description)
455 sprintf(result, "%s. Possible values: %s", description,
456 model_description[0].name ? model_description[0].name : "n/a");
458 for (i = 1; model_description[i].name; i++)
459 p += sprintf(p, ", %s", model_description[i].name);
461 ".\n (use 'help' as a value to see the long description of each %s)",
465 /* create the config set, register what should be and parse the command line*/
466 void sg_config_init(int *argc, char **argv)
468 char description[1024];
470 /* Create the configuration support */
471 if (_sg_cfg_init_status == 0) { /* Only create stuff if not already inited */
473 /* Plugins configuration */
474 describe_model(description, surf_plugin_description, "plugin", "The plugins");
475 xbt_cfg_register(&simgrid_config, "plugin", description, xbt_cfgelm_string, 0, &_sg_cfg_cb__plugin);
477 describe_model(description, surf_cpu_model_description, "model", "The model to use for the CPU");
478 xbt_cfg_register_string("cpu/model", description, "Cas01", &_sg_cfg_cb__cpu_model);
480 describe_model(description, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the CPU");
481 xbt_cfg_register_string("cpu/optim", description, "Lazy", &_sg_cfg_cb__optimization_mode);
483 describe_model(description, surf_storage_model_description, "model", "The model to use for the storage");
484 xbt_cfg_register_string("storage/model", description, "default", &_sg_cfg_cb__storage_mode);
486 describe_model(description, surf_network_model_description, "model", "The model to use for the network");
487 xbt_cfg_register_string("network/model", description, "LV08", &_sg_cfg_cb__network_model);
489 describe_model(description, surf_optimization_mode_description, "optimization mode", "The optimization modes to use for the network");
490 xbt_cfg_register_string("network/optim", description, "Lazy", &_sg_cfg_cb__optimization_mode);
492 describe_model(description, surf_host_model_description, "model", "The model to use for the host");
493 xbt_cfg_register_string("host/model", description, "default", &_sg_cfg_cb__host_model);
495 describe_model(description, surf_vm_model_description, "model", "The model to use for the vm");
496 xbt_cfg_register_string("vm/model", description, "default", &_sg_cfg_cb__vm_model);
498 xbt_cfg_register_double("network/TCP_gamma",
499 "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)",
500 4194304.0, _sg_cfg_cb__tcp_gamma);
502 xbt_cfg_register_double("surf/precision", "Numerical precision used when updating simulation times (in seconds)",
503 0.00001, _sg_cfg_cb__surf_precision);
505 xbt_cfg_register_double("maxmin/precision",
506 "Numerical precision used when computing resource sharing (in ops/sec or bytes/sec)",
507 0.00001, _sg_cfg_cb__maxmin_precision);
509 /* The parameters of network models */
511 xbt_cfg_register_double("network/sender_gap", "Minimum gap between two overlapping sends", NAN, _sg_cfg_cb__sender_gap); /* real default for "network/sender_gap" is set in network_smpi.cpp */
512 xbt_cfg_register_double("network/latency_factor", "Correction factor to apply to the provided latency (default value set by network model)",
513 1.0, _sg_cfg_cb__latency_factor);
514 xbt_cfg_register_double("network/bandwidth_factor", "Correction factor to apply to the provided bandwidth (default value set by network model)",
515 1.0, _sg_cfg_cb__bandwidth_factor);
516 xbt_cfg_register_double("network/weight_S",
517 "Correction factor to apply to the weight of competing streams (default value set by network model)",
518 NAN, _sg_cfg_cb__weight_S); /* real default for "network/weight_S" is set in network_*.cpp */
521 xbt_cfg_register_string("path", "Lookup path for inclusions in platform and deployment XML files", "", _sg_cfg_cb__surf_path);
523 xbt_cfg_register_boolean("cpu/maxmin_selective_update",
524 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)",
526 xbt_cfg_register_boolean("network/maxmin_selective_update",
527 "Update the constraint set propagating recursively to others constraints (off by default when optim is set to lazy)",
529 /* Replay (this part is enabled even if MC it disabled) */
530 xbt_cfg_register(&simgrid_config, "model-check/replay", "Enable replay mode with the given path", xbt_cfgelm_string, 0, _sg_cfg_cb_model_check_replay);
533 /* do model-checking-record */
534 xbt_cfg_register_boolean("model-check/record", "Record the model-checking paths", "no", _sg_cfg_cb_model_check_record);
536 xbt_cfg_register_int("model-check/checkpoint",
537 "Specify the amount of steps between checkpoints during stateful model-checking (default: 0 => stateless verification). "
538 "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.",
539 0, _mc_cfg_cb_checkpoint);
541 xbt_cfg_register_boolean("model-check/sparse_checkpoint", "Use sparse per-page snapshots.", "no", _mc_cfg_cb_sparse_checkpoint);
542 xbt_cfg_register_boolean("model-check/soft-dirty", "Use sparse per-page snapshots.", "no", _mc_cfg_cb_soft_dirty);
543 xbt_cfg_register_boolean("model-check/ksm", "Kernel same-page merging", "no", _mc_cfg_cb_ksm);
545 xbt_cfg_register_string("model-check/property", "Name of the file containing the property, as formated by the ltl2ba program.",
546 "", _mc_cfg_cb_property);
548 xbt_cfg_register_boolean("model-check/communications_determinism",
549 "Whether to enable the detection of communication determinism", "no", _mc_cfg_cb_comms_determinism);
551 xbt_cfg_register_boolean("model-check/send_determinism",
552 "Enable/disable the detection of send-determinism in the communications schemes", "no", _mc_cfg_cb_send_determinism);
554 /* Specify the kind of model-checking reduction */
555 xbt_cfg_register_string("model-check/reduction", "Specify the kind of exploration reduction (either none or DPOR)", "dpor", _mc_cfg_cb_reduce);
556 xbt_cfg_register_boolean("model-check/timeout", "Whether to enable timeouts for wait requests", "no", _mc_cfg_cb_timeout);
558 xbt_cfg_register_boolean("model-check/hash", "Whether to enable state hash for state comparison (experimental)", "no", _mc_cfg_cb_hash);
559 xbt_cfg_register_boolean("model-check/snapshot_fds", "Whether file descriptors must be snapshoted (currently unusable)", "no", _mc_cfg_cb_snapshot_fds);
560 xbt_cfg_register_int("model-check/max_depth", "Maximal exploration depth (default: 1000)", 1000, _mc_cfg_cb_max_depth);
561 xbt_cfg_register_int("model-check/visited",
562 "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.",
563 0, _mc_cfg_cb_visited);
565 xbt_cfg_register_string("model-check/dot_output", "Name of dot output file corresponding to graph state", "", _mc_cfg_cb_dot_output);
566 xbt_cfg_register_boolean("model-check/termination", "Whether to enable non progressive cycle detection", "no", _mc_cfg_cb_termination);
569 xbt_cfg_register_boolean("verbose-exit", "Activate the \"do nothing\" mode in Ctrl-C", "yes", _sg_cfg_cb_verbose_exit);
571 /* context factory */
572 const char *dflt_ctx_fact = "thread";
574 char *p = description +
576 "Context factory to use in SIMIX. Possible values: %s",
578 #if HAVE_UCONTEXT_CONTEXTS
579 dflt_ctx_fact = "ucontext";
580 p += sprintf(p, ", %s", dflt_ctx_fact);
582 #if HAVE_RAW_CONTEXTS
583 dflt_ctx_fact = "raw";
584 p += sprintf(p, ", %s", dflt_ctx_fact);
588 xbt_cfg_register_string("contexts/factory", description, dflt_ctx_fact, _sg_cfg_cb_context_factory);
590 xbt_cfg_register_int("contexts/stack_size", "Stack size of contexts in KiB", 8*1024, _sg_cfg_cb_context_stack_size);
591 /* (FIXME: this is unpleasant) Reset this static variable that was altered when setting the default value. */
592 smx_context_stack_size_was_set = 0;
594 /* guard size for contexts stacks in memory pages */
595 xbt_cfg_register_int("contexts/guard_size", "Guard size for contexts stacks in memory pages",
596 #if defined(_WIN32) || (PTH_STACKGROWTH != -1)
597 0, _sg_cfg_cb_context_guard_size);
599 1, _sg_cfg_cb_context_guard_size);
601 /* No, it was not set yet (the above setdefault() changed this to 1). */
602 smx_context_guard_size_was_set = 0;
604 xbt_cfg_register_int("contexts/nthreads", "Number of parallel threads used to execute user contexts", 1, _sg_cfg_cb_contexts_nthreads);
606 xbt_cfg_register_int("contexts/parallel_threshold", "Minimal number of user contexts to be run in parallel (raw contexts only)",
607 2, _sg_cfg_cb_contexts_parallel_threshold);
609 /* synchronization mode for parallel user contexts */
610 xbt_cfg_register_string("contexts/synchro", "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)",
612 "futex", _sg_cfg_cb_contexts_parallel_mode);
613 #else //No futex on mac and posix is unimplememted yet
614 "busy_wait", _sg_cfg_cb_contexts_parallel_mode);
617 xbt_cfg_register_boolean("network/coordinates", "Whether we use a coordinate-based routing (as Vivaldi)",
618 "no", _sg_cfg_cb__surf_network_coordinates);
620 xbt_cfg_register_boolean("network/crosstraffic", "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)",
621 "yes", _sg_cfg_cb__surf_network_crosstraffic);
624 xbt_cfg_register_string("ns3/TcpModel", "The ns3 tcp model can be : NewReno or Reno or Tahoe", "default", NULL);
627 //For smpi/bw_factor and smpi/lat_factor
628 //Default value have to be "threshold0:value0;threshold1:value1;...;thresholdN:valueN"
629 //test is if( size >= thresholdN ) return valueN;
630 //Values can be modified with command line --cfg=smpi/bw_factor:"threshold0:value0;threshold1:value1;...;thresholdN:valueN"
631 // or with tag config put line <prop id="smpi/bw_factor" value="threshold0:value0;threshold1:value1;...;thresholdN:valueN"></prop>
632 // SMPI model can be used without enable_smpi, so keep this out of the ifdef.
633 xbt_cfg_register_string("smpi/bw_factor", "Bandwidth factors for smpi.",
634 "65472:0.940694;15424:0.697866;9376:0.58729;5776:1.08739;3484:0.77493;1426:0.608902;732:0.341987;257:0.338112;0:0.812084", NULL);
636 xbt_cfg_register_string("smpi/lat_factor", "Latency factors for smpi.",
637 "65472:11.6436;15424:3.48845;9376:2.59299;5776:2.18796;3484:1.88101;1426:1.61075;732:1.9503;257:1.95341;0:2.01467", NULL);
639 xbt_cfg_register_string("smpi/IB_penalty_factors",
640 "Correction factor to communications using Infiniband model with contention (default value based on Stampede cluster profiling)",
641 "0.965;0.925;1.35", NULL);
644 xbt_cfg_register_double("smpi/running_power", "Power of the host running the simulation (in flop/s). Used to bench the operations.", 20000.0, NULL);
645 xbt_cfg_register_boolean("smpi/display_timing", "Whether we should display the timing after simulation.", "no", NULL);
646 xbt_cfg_register_boolean("smpi/simulate_computation", "Whether the computational part of the simulated application should be simulated.", "yes", NULL);
647 xbt_cfg_register_boolean("smpi/use_shared_malloc", "Whether SMPI_SHARED_MALLOC is enabled. Disable it for debugging purposes.", "yes", NULL);
648 xbt_cfg_register_double("smpi/cpu_threshold", "Minimal computation time (in seconds) not discarded, or -1 for infinity.", 1e-6, NULL);
649 xbt_cfg_register_int("smpi/async_small_thresh", "Maximal size of messages that are to be sent asynchronously, without waiting for the receiver",
651 xbt_cfg_register_int("smpi/send_is_detached_thresh", "Threshold of message size where MPI_Send stops behaving like MPI_Isend and becomes MPI_Ssend",
654 xbt_cfg_register_boolean("smpi/privatize_global_variables", "Whether we should privatize global variable at runtime.", "no", NULL);
655 xbt_cfg_register_string("smpi/os", "Small messages timings (MPI_Send minimum time for small messages)", "1:0:0:0:0", NULL);
656 xbt_cfg_register_string("smpi/ois", "Small messages timings (MPI_Isend minimum time for small messages)", "1:0:0:0:0", NULL);
657 xbt_cfg_register_string("smpi/or", "Small messages timings (MPI_Recv minimum time for small messages)", "1:0:0:0:0", NULL);
658 xbt_cfg_register_double("smpi/iprobe", "Minimum time to inject inside a call to MPI_Iprobe", 1e-4, _sg_cfg_cb__iprobe_sleep);
659 xbt_cfg_register_double("smpi/test", "Minimum time to inject inside a call to MPI_Test", 1e-4, _sg_cfg_cb__test_sleep);
660 xbt_cfg_register_double("smpi/wtime", "Minimum time to inject inside a call to MPI_Wtime", 0.0, _sg_cfg_cb__wtime_sleep);
662 xbt_cfg_register_string("smpi/coll_selector", "Which collective selector to use", "default", NULL);
663 xbt_cfg_register_string("smpi/gather", "Which collective to use for gather", nullptr, &_check_coll_gather);
664 xbt_cfg_register_string("smpi/allgather", "Which collective to use for allgather", nullptr, &_check_coll_allgather);
665 xbt_cfg_register_string("smpi/barrier", "Which collective to use for barrier", nullptr, &_check_coll_barrier);
666 xbt_cfg_register_string("smpi/reduce_scatter", "Which collective to use for reduce_scatter", nullptr, &_check_coll_reduce_scatter);
667 xbt_cfg_register_string("smpi/scatter", "Which collective to use for scatter", nullptr, &_check_coll_scatter);
668 xbt_cfg_register_string("smpi/allgatherv", "Which collective to use for allgatherv", nullptr, &_check_coll_allgatherv);
669 xbt_cfg_register_string("smpi/allreduce", "Which collective to use for allreduce", nullptr, &_check_coll_allreduce);
670 xbt_cfg_register_string("smpi/alltoall", "Which collective to use for alltoall", nullptr, &_check_coll_alltoall);
671 xbt_cfg_register_string("smpi/alltoallv", "Which collective to use for alltoallv", nullptr, &_check_coll_alltoallv);
672 xbt_cfg_register_string("smpi/bcast", "Which collective to use for bcast", nullptr, &_check_coll_bcast);
673 xbt_cfg_register_string("smpi/reduce", "Which collective to use for reduce", nullptr, &_check_coll_reduce);
676 xbt_cfg_register_boolean("exception/cutpath", "Whether to cut all path information from call traces, used e.g. in exceptions.", "no", NULL);
678 xbt_cfg_register_boolean("clean_atexit", "Whether to cleanup SimGrid at exit. Disable it if your code segfaults at ending.",
679 "yes", _sg_cfg_cb_clean_atexit);
682 /* retrieves the current directory of the current process */
683 const char *initial_path = __surf_get_initial_path();
684 xbt_assert((initial_path), "__surf_get_initial_path() failed! Can't resolve current Windows directory");
686 surf_path = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
687 xbt_cfg_setdefault_string("path", initial_path);
691 _sg_cfg_init_status = 1;
693 sg_config_cmd_line(argc, argv);
695 xbt_mallocator_initialization_is_done(SIMIX_context_is_parallel());
697 XBT_WARN("Call to sg_config_init() after initialization ignored");
701 void sg_config_finalize(void)
703 if (!_sg_cfg_init_status)
704 return; /* Not initialized yet. Nothing to do */
706 xbt_cfg_free(&simgrid_config);
707 _sg_cfg_init_status = 0;
710 int sg_cfg_is_default_value(const char *name)
712 return xbt_cfg_is_default_value(name);
715 int sg_cfg_get_int(const char* name)
717 return xbt_cfg_get_int(name);
720 double sg_cfg_get_double(const char* name)
722 return xbt_cfg_get_double(name);
725 char* sg_cfg_get_string(const char* name)
727 return xbt_cfg_get_string(name);
730 int sg_cfg_get_boolean(const char* name)
732 return xbt_cfg_get_boolean(name);
735 xbt_dynar_t sg_cfg_get_dynar(const char* name)
737 return xbt_cfg_get_dynar(name);