1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011. 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. */
9 #include "surf_private.h"
10 #include "xbt/module.h"
12 #include "surf/surf_resource.h"
13 #include "xbt/xbt_os_thread.h"
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_kernel, surf,
16 "Logging specific to SURF (kernel)");
18 /* Additional declarations for Windows portability. */
26 static const char *disk_drives_letter_table[MAX_DRIVE] = {
54 #endif /* #ifdef _XBT_WIN32 */
57 * Returns the initial path. On Windows the initial path is
58 * the current directory for the current process in the other
59 * case the function returns "./" that represents the current
60 * directory on Unix/Linux platforms.
63 const char *__surf_get_initial_path(void)
68 char current_directory[MAX_PATH + 1] = { 0 };
69 unsigned int len = GetCurrentDirectory(MAX_PATH + 1, current_directory);
75 strncpy(root, current_directory, 3);
77 for (i = 0; i < MAX_DRIVE; i++) {
78 if (toupper(root[0]) == disk_drives_letter_table[i][0])
79 return disk_drives_letter_table[i];
88 /* The __surf_is_absolute_file_path() returns 1 if
89 * file_path is a absolute file path, in the other
90 * case the function returns 0.
92 int __surf_is_absolute_file_path(const char *file_path)
95 WIN32_FIND_DATA wfd = { 0 };
96 HANDLE hFile = FindFirstFile(file_path, &wfd);
98 if (INVALID_HANDLE_VALUE == hFile)
104 return (file_path[0] == '/');
110 xbt_dynar_t model_list = NULL;
111 tmgr_history_t history = NULL;
112 lmm_system_t maxmin_system = NULL;
113 xbt_dynar_t surf_path = NULL;
115 /* Don't forget to update the option description in smx_config when you change this */
116 s_surf_model_description_t surf_network_model_description[] = {
118 "Realistic network analytic model (slow-start modeled by multiplying latency by 10.4, bandwidth by .92; bottleneck sharing uses a payload of S=8775 for evaluating RTT). ",
119 surf_network_model_init_LegrandVelho},
121 "Simplistic network model where all communication take a constant time (one second). This model provides the lowest realism, but is (marginally) faster.",
122 surf_network_model_init_Constant},
124 "Realistic network model specifically tailored for HPC settings (accurate modeling of slow start with correction factors on three intervals: < 1KiB, < 64 KiB, >= 64 KiB)",
125 surf_network_model_init_SMPI},
127 "Legacy network analytic model (Very similar to LV08, but without corrective factors. The timings of small messages are thus poorly modeled).",
128 surf_network_model_init_CM02},
131 "Network pseudo-model using the GTNets simulator instead of an analytic model",
132 surf_network_model_init_GTNETS},
136 "Network pseudo-model using the NS3 tcp model instead of an analytic model",
137 surf_network_model_init_NS3},
140 "Model from Steven H. Low using lagrange_solve instead of lmm_solve (experts only; check the code for more info).",
141 surf_network_model_init_Reno},
143 "Model from Steven H. Low using lagrange_solve instead of lmm_solve (experts only; check the code for more info).",
144 surf_network_model_init_Reno2},
146 "Model from Steven H. Low using lagrange_solve instead of lmm_solve (experts only; check the code for more info).",
147 surf_network_model_init_Vegas},
148 {NULL, NULL, NULL} /* this array must be NULL terminated */
151 s_surf_model_description_t surf_cpu_model_description[] = {
153 "Simplistic CPU model (time=size/power).",
154 surf_cpu_model_init_Cas01},
155 {NULL, NULL, NULL} /* this array must be NULL terminated */
158 s_surf_model_description_t surf_workstation_model_description[] = {
160 "Default workstation model. Currently, CPU:Cas01 and network:LV08 (with cross traffic enabled)",
161 surf_workstation_model_init_current_default},
163 "Workstation model that is automatically chosen if you change the network and CPU models",
164 surf_workstation_model_init_compound},
165 {"ptask_L07", "Workstation model somehow similar to Cas01+CM02 but allowing parallel tasks",
166 surf_workstation_model_init_ptask_L07},
167 {NULL, NULL, NULL} /* this array must be NULL terminated */
170 s_surf_model_description_t surf_optimization_mode_description[] = {
172 "Lazy action management (partial invalidation in lmm + heap in action remaining).",
175 "Trace integration. Highly optimized mode when using availability traces (only available for the Cas01 CPU model for now).",
178 "Full update of remaining and variables. Slow but may be useful when debugging.",
180 {NULL, NULL, NULL} /* this array must be NULL terminated */
183 s_surf_model_description_t surf_storage_model_description[] = {
185 "Simplistic storage model.",
186 surf_storage_model_init_default},
187 {NULL, NULL, NULL} /* this array must be NULL terminated */
190 #ifdef CONTEXT_THREADS
191 static xbt_parmap_t surf_parmap = NULL; /* parallel map on models */
194 static int surf_nthreads = 1; /* number of threads of the parmap (1 means no parallelism) */
195 static double *surf_mins = NULL; /* return value of share_resources for each model */
196 static int surf_min_index; /* current index in surf_mins */
197 static double min; /* duration determined by surf_solve */
199 static void surf_share_resources(surf_model_t model);
200 static void surf_update_actions_state(surf_model_t model);
202 /** Displays the long description of all registered models, and quit */
203 void model_help(const char *category, s_surf_model_description_t * table)
206 printf("Long description of the %s models accepted by this simulator:\n",
208 for (i = 0; table[i].name; i++)
209 printf(" %s: %s\n", table[i].name, table[i].description);
212 int find_model_description(s_surf_model_description_t * table,
216 char *name_list = NULL;
218 for (i = 0; table[i].name; i++)
219 if (!strcmp(name, table[i].name)) {
222 name_list = strdup(table[0].name);
223 for (i = 1; table[i].name; i++) {
225 xbt_realloc(name_list,
226 strlen(name_list) + strlen(table[i].name) + 3);
227 strcat(name_list, ", ");
228 strcat(name_list, table[i].name);
230 xbt_die("Model '%s' is invalid! Valid models are: %s.", name, name_list);
234 double generic_maxmin_share_resources(xbt_swag_t running_actions,
237 void (*solve) (lmm_system_t))
239 surf_action_t action = NULL;
242 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
246 xbt_swag_foreach(action, running_actions) {
247 value = lmm_variable_getvalue(VARIABLE(action));
248 if ((value > 0) || (action->max_duration >= 0))
256 if (action->remains > 0)
257 min = action->remains / value;
260 if ((action->max_duration >= 0) && (action->max_duration < min))
261 min = action->max_duration;
263 min = action->max_duration;
266 for (action = xbt_swag_getNext(action, running_actions->offset);
268 action = xbt_swag_getNext(action, running_actions->offset)) {
269 value = lmm_variable_getvalue(VARIABLE(action));
271 if (action->remains > 0)
272 value = action->remains / value;
277 XBT_DEBUG("Updating min (value) with %p: %f", action, min);
280 if ((action->max_duration >= 0) && (action->max_duration < min)) {
281 min = action->max_duration;
282 XBT_DEBUG("Updating min (duration) with %p: %f", action, min);
285 XBT_DEBUG("min value : %f", min);
291 static XBT_INLINE void routing_asr_host_free(void *p)
293 network_element_t elm = p;
298 void surf_init(int *argc, char **argv)
300 XBT_DEBUG("Create all Libs");
301 host_lib = xbt_lib_new();
302 link_lib = xbt_lib_new();
303 as_router_lib = xbt_lib_new();
304 storage_lib = xbt_lib_new();
305 storage_type_lib = xbt_lib_new();
307 XBT_DEBUG("ADD ROUTING LEVEL");
308 ROUTING_HOST_LEVEL = xbt_lib_add_level(host_lib,routing_asr_host_free);
309 ROUTING_ASR_LEVEL = xbt_lib_add_level(as_router_lib,routing_asr_host_free);
310 ROUTING_STORAGE_LEVEL = xbt_lib_add_level(storage_lib,xbt_free);
311 ROUTING_STORAGE_HOST_LEVEL = xbt_lib_add_level(storage_lib,routing_storage_host_free);
312 ROUTING_STORAGE_TYPE_LEVEL = xbt_lib_add_level(storage_type_lib,routing_storage_type_free);
314 XBT_DEBUG("ADD SURF LEVELS");
315 SURF_CPU_LEVEL = xbt_lib_add_level(host_lib,surf_resource_free);
316 SURF_WKS_LEVEL = xbt_lib_add_level(host_lib,surf_resource_free);
317 SURF_LINK_LEVEL = xbt_lib_add_level(link_lib,surf_resource_free);
318 SURF_STORAGE_LEVEL = xbt_lib_add_level(storage_lib,surf_resource_free);
320 xbt_init(argc, argv);
322 model_list = xbt_dynar_new(sizeof(surf_model_private_t), NULL);
324 history = tmgr_history_new();
326 surf_config_init(argc, argv);
333 # define FILE_DELIM "\\"
335 # define FILE_DELIM "/" /* FIXME: move to better location */
338 FILE *surf_fopen(const char *name, const char *mode)
341 char *path_elm = NULL;
347 if (__surf_is_absolute_file_path(name)) /* don't mess with absolute file names */
348 return fopen(name, mode);
350 /* search relative files in the path */
351 xbt_dynar_foreach(surf_path, cpt, path_elm) {
352 buff = bprintf("%s" FILE_DELIM "%s", path_elm, name);
353 file = fopen(buff, mode);
365 surf_model_t model = NULL;
367 surf_config_finalize();
369 xbt_dynar_foreach(model_list, iter, model)
370 model->model_private->finalize();
371 xbt_dynar_free(&model_list);
375 lmm_system_free(maxmin_system);
376 maxmin_system = NULL;
379 tmgr_history_free(history);
384 #ifdef CONTEXT_THREADS
385 xbt_parmap_destroy(surf_parmap);
390 xbt_dynar_free(&surf_path);
392 xbt_lib_free(&host_lib);
393 xbt_lib_free(&link_lib);
394 xbt_lib_free(&as_router_lib);
395 xbt_lib_free(&storage_lib);
396 xbt_lib_free(&storage_type_lib);
399 surf_parse_lex_destroy();
400 surf_parse_free_callbacks();
402 NOW = 0; /* Just in case the user plans to restart the simulation afterward */
405 void surf_presolve(void)
407 double next_event_date = -1.0;
408 tmgr_trace_event_t event = NULL;
410 surf_resource_t resource = NULL;
411 surf_model_t model = NULL;
415 ("First Run! Let's \"purge\" events and put models in the right state");
416 while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
417 if (next_event_date > NOW)
420 tmgr_history_get_next_event_leq(history, next_event_date,
422 (void **) &resource))) {
423 resource->model->model_private->update_resource_state(resource,
428 xbt_dynar_foreach(model_list, iter, model)
429 model->model_private->update_actions_state(NOW, 0.0);
432 double surf_solve(double max_date)
434 min = -1.0; /* duration */
435 double next_event_date = -1.0;
436 double model_next_action_end = -1.0;
438 surf_resource_t resource = NULL;
439 surf_model_t model = NULL;
440 tmgr_trace_event_t event = NULL;
443 if (max_date != -1.0 && max_date != NOW) {
444 min = max_date - NOW;
447 XBT_DEBUG("Looking for next action end for all models except NS3");
449 if (surf_mins == NULL) {
450 surf_mins = xbt_new(double, xbt_dynar_length(model_list));
455 if (surf_get_nthreads() > 1) {
456 /* parallel version */
457 #ifdef CONTEXT_THREADS
458 xbt_parmap_apply(surf_parmap, (void_f_pvoid_t) surf_share_resources, model_list);
462 /* sequential version */
463 xbt_dynar_foreach(model_list, iter, model) {
464 surf_share_resources(model);
469 for (i = 0; i < xbt_dynar_length(model_list); i++) {
470 if ((min < 0.0 || surf_mins[i] < min)
471 && surf_mins[i] >= 0.0) {
476 XBT_DEBUG("Min for resources (remember that NS3 dont update that value) : %f", min);
478 XBT_DEBUG("Looking for next trace event");
481 XBT_DEBUG("Next TRACE event : %f", next_event_date);
483 next_event_date = tmgr_history_next_date(history);
485 if(surf_network_model->name && !strcmp(surf_network_model->name,"network NS3")){
486 if(next_event_date!=-1.0 && min!=-1.0) {
487 min = MIN(next_event_date - NOW, min);
489 min = MAX(next_event_date - NOW, min);
492 XBT_DEBUG("Run for NS3 at most %f", min);
493 // run until min or next flow
494 model_next_action_end = surf_network_model->model_private->share_resources(min);
496 XBT_DEBUG("Min for NS3 : %f", model_next_action_end);
497 if(model_next_action_end>=0.0)
498 min = model_next_action_end;
501 if (next_event_date == -1.0) {
502 XBT_DEBUG("no next TRACE event. Stop searching for it");
506 if ((min != -1.0) && (next_event_date > NOW + min)) break;
508 XBT_DEBUG("Updating models");
510 tmgr_history_get_next_event_leq(history, next_event_date,
512 (void **) &resource))) {
513 if (resource->model->model_private->resource_used(resource)) {
514 min = next_event_date - NOW;
516 ("This event will modify model state. Next event set to %f",
519 /* update state of model_obj according to new value. Does not touch lmm.
520 It will be modified if needed when updating actions */
521 XBT_DEBUG("Calling update_resource_state for resource %s with min %lf",
522 resource->model->name, min);
523 resource->model->model_private->update_resource_state(resource,
529 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are with availability = 0.
530 * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
531 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
533 XBT_DEBUG("No next event at all. Bail out now.");
537 XBT_DEBUG("Duration set to %f", min);
541 if (surf_get_nthreads() > 1) {
542 /* parallel version */
543 #ifdef CONTEXT_THREADS
544 xbt_parmap_apply(surf_parmap, (void_f_pvoid_t) surf_update_actions_state, model_list);
548 /* sequential version */
549 xbt_dynar_foreach(model_list, iter, model) {
550 surf_update_actions_state(model);
555 TRACE_paje_dump_buffer (0);
561 XBT_INLINE double surf_get_clock(void)
566 static void surf_share_resources(surf_model_t model)
568 double next_action_end = -1.0;
569 int i = __sync_fetch_and_add(&surf_min_index, 1);
570 if (strcmp(model->name,"network NS3")) {
571 XBT_DEBUG("Running for Resource [%s]", model->name);
572 next_action_end = model->model_private->share_resources(NOW);
573 XBT_DEBUG("Resource [%s] : next action end = %f",
574 model->name, next_action_end);
576 surf_mins[i] = next_action_end;
579 static void surf_update_actions_state(surf_model_t model)
581 model->model_private->update_actions_state(NOW, min);
585 * \brief Returns the number of parallel threads used to update the models.
586 * \return the number of threads (1 means no parallelism)
588 int surf_get_nthreads(void) {
589 return surf_nthreads;
593 * \brief Sets the number of parallel threads used to update the models.
595 * A value of 1 means no parallelism.
597 * \param nb_threads the number of threads to use
599 void surf_set_nthreads(int nthreads) {
602 nthreads = xbt_os_get_numcores();
603 XBT_INFO("Auto-setting surf/nthreads to %d",nthreads);
606 #ifdef CONTEXT_THREADS
607 xbt_parmap_destroy(surf_parmap);
612 #ifdef CONTEXT_THREADS
613 surf_parmap = xbt_parmap_new(nthreads, XBT_PARMAP_DEFAULT);
615 THROWF(arg_error, 0, "Cannot activate parallel threads in Surf: your architecture does not support threads");
619 surf_nthreads = nthreads;