src/surf/network.c

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "network_private.h"
   9
  10 #define SG_TCP_CTE_GAMMA 20000.0
  11
  12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(network, surf,
  13                                 "Logging specific to the SURF network module");
  14
  15 surf_network_resource_t surf_network_resource = NULL;
  16
  17 static xbt_dict_t network_link_set = NULL;
  18 xbt_dict_t network_card_set = NULL;
  19
  20 static int card_number = 0;
  21 static network_link_t **routing_table = NULL;
  22 static int *routing_table_size = NULL;
  23
  24 #define ROUTE(i,j) routing_table[(i)+(j)*card_number]
  25 #define ROUTE_SIZE(i,j) routing_table_size[(i)+(j)*card_number]
  26
  27 static void create_routing_table(void)
  28 {
  29   routing_table = xbt_new0(network_link_t *, card_number * card_number);
  30   routing_table_size = xbt_new0(int, card_number * card_number);
  31 }
  32
  33 static void network_link_free(void *nw_link)
  34 {
  35   xbt_free(((network_link_t)nw_link)->name);
  36   xbt_free(nw_link);
  37 }
  38
  39 static network_link_t network_link_new(char *name,
  40                                        double bw_initial,
  41                                        tmgr_trace_t bw_trace,
  42                                        double lat_initial,
  43                                        tmgr_trace_t lat_trace,
  44                                        e_surf_network_link_state_t
  45                                        state_initial,
  46                                        tmgr_trace_t state_trace)
  47 {
  48   network_link_t nw_link = xbt_new0(s_network_link_t, 1);
  49
  50
  51   nw_link->resource = (surf_resource_t) surf_network_resource;
  52   nw_link->name = name;
  53   nw_link->bw_current = bw_initial;
  54   if (bw_trace)
  55     nw_link->bw_event =
  56         tmgr_history_add_trace(history, bw_trace, 0.0, 0, nw_link);
  57   nw_link->lat_current = lat_initial;
  58   if (lat_trace)
  59     nw_link->lat_event =
  60         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
  61   nw_link->state_current = state_initial;
  62   if (state_trace)
  63     nw_link->state_event =
  64         tmgr_history_add_trace(history, state_trace, 0.0, 0, nw_link);
  65
  66   nw_link->constraint =
  67       lmm_constraint_new(maxmin_system, nw_link, nw_link->bw_current);
  68
  69   xbt_dict_set(network_link_set, name, nw_link, network_link_free);
  70
  71   return nw_link;
  72 }
  73
  74 static void network_card_free(void *nw_card)
  75 {
  76   xbt_free(((network_card_t)nw_card)->name);
  77   xbt_free(nw_card);
  78 }
  79
  80 static int network_card_new(const char *card_name)
  81 {
  82   network_card_t card = NULL;
  83
  84   xbt_dict_get(network_card_set, card_name, (void *) &card);
  85
  86   if (!card) {
  87     card = xbt_new0(s_network_card_t, 1);
  88     card->name = xbt_strdup(card_name);
  89     card->id = card_number++;
  90     xbt_dict_set(network_card_set, card_name, card, network_card_free);
  91   }
  92   return card->id;
  93 }
  94
  95 static void route_new(int src_id, int dst_id, char **links, int nb_link)
  96 {
  97   network_link_t *link_list = NULL;
  98   int i;
  99
 100   ROUTE_SIZE(src_id, dst_id) = nb_link;
 101   link_list = (ROUTE(src_id, dst_id) = xbt_new0(network_link_t, nb_link));
 102   for (i = 0; i < nb_link; i++) {
 103     xbt_dict_get(network_link_set, links[i], (void *) &(link_list[i]));
 104     xbt_free(links[i]);
 105   }
 106   xbt_free(links);
 107 }
 108
 109 static void parse_network_link(void)
 110 {
 111   char *name;
 112   double bw_initial;
 113   tmgr_trace_t bw_trace;
 114   double lat_initial;
 115   tmgr_trace_t lat_trace;
 116   e_surf_network_link_state_t state_initial = SURF_NETWORK_LINK_ON;
 117   tmgr_trace_t state_trace;
 118
 119   name = xbt_strdup(A_network_link_name);
 120   surf_parse_get_double(&bw_initial,A_network_link_bandwidth);
 121   surf_parse_get_trace(&bw_trace, A_network_link_bandwidth_file);
 122   surf_parse_get_double(&lat_initial,A_network_link_latency);
 123   surf_parse_get_trace(&lat_trace, A_network_link_latency_file);
 124
 125   xbt_assert0((A_network_link_state==A_network_link_state_ON)||
 126               (A_network_link_state==A_network_link_state_OFF),
 127               "Invalid state")
 128   if (A_network_link_state==A_network_link_state_ON)
 129     state_initial = SURF_NETWORK_LINK_ON;
 130   if (A_network_link_state==A_network_link_state_OFF)
 131     state_initial = SURF_NETWORK_LINK_OFF;
 132   surf_parse_get_trace(&state_trace,A_network_link_state_file);
 133
 134   network_link_new(name, bw_initial, bw_trace,
 135                    lat_initial, lat_trace, state_initial, state_trace);
 136 }
 137
 138 static int nb_link = 0;
 139 static char **link_name = NULL;
 140 static int src_id = -1;
 141 static int dst_id = -1;
 142
 143 static void parse_route_set_endpoints(void)
 144 {
 145   src_id = network_card_new(A_route_src);
 146   dst_id = network_card_new(A_route_dst);
 147   nb_link = 0;
 148   link_name = NULL;
 149 }
 150
 151 static void parse_route_elem(void)
 152 {
 153   nb_link++;
 154   link_name = xbt_realloc(link_name, (nb_link) * sizeof(char *));
 155   link_name[(nb_link) - 1] = xbt_strdup(A_route_element_name);
 156 }
 157
 158 static void parse_route_set_route(void)
 159 {
 160   route_new(src_id, dst_id, link_name, nb_link);
 161 }
 162
 163 static void parse_file(const char *file)
 164 {
 165   /* Figuring out the network links */
 166   surf_parse_reset_parser();
 167   ETag_network_link_fun=parse_network_link;
 168   surf_parse_open(file);
 169   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 170   surf_parse_close();
 171
 172   /* Figuring out the network cards used */
 173   surf_parse_reset_parser();
 174   STag_route_fun=parse_route_set_endpoints;
 175   surf_parse_open(file);
 176   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 177   surf_parse_close();
 178
 179   create_routing_table();
 180
 181   /* Building the routes */
 182   surf_parse_reset_parser();
 183   STag_route_fun=parse_route_set_endpoints;
 184   ETag_route_element_fun=parse_route_elem;
 185   ETag_route_fun=parse_route_set_route;
 186   surf_parse_open(file);
 187   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 188   surf_parse_close();
 189 }
 190
 191 static void *name_service(const char *name)
 192 {
 193   network_card_t card = NULL;
 194
 195   xbt_dict_get(network_card_set, name, (void *) &card);
 196
 197   return card;
 198 }
 199
 200 static const char *get_resource_name(void *resource_id)
 201 {
 202   return ((network_card_t) resource_id)->name;
 203 }
 204
 205 static int resource_used(void *resource_id)
 206 {
 207   return lmm_constraint_used(maxmin_system,
 208                              ((network_link_t) resource_id)->constraint);
 209 }
 210
 211 static void action_free(surf_action_t action)
 212 {
 213   surf_action_network_t Action = (surf_action_network_t) action;
 214
 215   xbt_swag_remove(action, action->state_set);
 216   lmm_variable_free(maxmin_system, Action->variable);
 217   xbt_free(action);
 218
 219   return;
 220 }
 221
 222 static void action_cancel(surf_action_t action)
 223 {
 224   return;
 225 }
 226
 227 static void action_recycle(surf_action_t action)
 228 {
 229   return;
 230 }
 231
 232 static void action_change_state(surf_action_t action,
 233                                 e_surf_action_state_t state)
 234 {
 235   surf_action_change_state(action, state);
 236   return;
 237 }
 238
 239 static double share_resources(double now)
 240 {
 241   s_surf_action_network_t s_action;
 242   surf_action_network_t action = NULL;
 243   xbt_swag_t running_actions = surf_network_resource->common_public->states.running_action_set;
 244   double min = generic_maxmin_share_resources(running_actions,
 245                                               xbt_swag_offset(s_action, variable));
 246
 247   xbt_swag_foreach(action, running_actions) {
 248     if(action->latency>0) {
 249       if(min<0) min = action->latency;
 250       else if (action->latency<min) min = action->latency;
 251     }
 252   }
 253
 254   return min;
 255 }
 256
 257
 258 static void update_actions_state(double now, double delta)
 259 {
 260   double deltap = 0.0;
 261   surf_action_network_t action = NULL;
 262   surf_action_network_t next_action = NULL;
 263   xbt_swag_t running_actions =
 264       surf_network_resource->common_public->states.running_action_set;
 265   xbt_swag_t failed_actions =
 266       surf_network_resource->common_public->states.failed_action_set;
 267
 268   xbt_swag_foreach_safe(action, next_action, running_actions) {
 269     deltap = delta;
 270     if (action->latency > 0) {
 271       if (action->latency > deltap) {
 272         action->latency -= deltap;
 273         deltap = 0.0;
 274       } else {
 275         deltap -= action->latency;
 276         action->latency = 0.0;
 277       }
 278       if ((action->latency == 0.0) && !(action->suspended))
 279         lmm_update_variable_weight(maxmin_system, action->variable, 1.0);
 280     }
 281     action->generic_action.remains -=
 282         lmm_variable_getvalue(action->variable) * deltap;
 283     if (action->generic_action.max_duration != NO_MAX_DURATION)
 284       action->generic_action.max_duration -= delta;
 285
 286     /*   if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 287
 288     if (action->generic_action.remains <= 0) {
 289       action->generic_action.finish = surf_get_clock();
 290       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 291     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 292                (action->generic_action.max_duration <= 0)) {
 293       action->generic_action.finish = surf_get_clock();
 294       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 295     } else {                    /* Need to check that none of the resource has failed */
 296       lmm_constraint_t cnst = NULL;
 297       int i = 0;
 298       network_link_t nw_link = NULL;
 299
 300       while ((cnst =
 301               lmm_get_cnst_from_var(maxmin_system, action->variable,
 302                                     i++))) {
 303         nw_link = lmm_constraint_id(cnst);
 304         if (nw_link->state_current == SURF_NETWORK_LINK_OFF) {
 305           action->generic_action.finish = surf_get_clock();
 306           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 307           break;
 308         }
 309       }
 310     }
 311   }
 312
 313   xbt_swag_foreach_safe(action, next_action, failed_actions) {
 314     lmm_variable_disable(maxmin_system, action->variable);
 315   }
 316
 317   return;
 318 }
 319
 320 static void update_resource_state(void *id,
 321                                   tmgr_trace_event_t event_type,
 322                                   double value)
 323 {
 324   network_link_t nw_link = id;
 325   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 326   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 327   /*     value, event_type); */
 328
 329   if (event_type == nw_link->bw_event) {
 330     nw_link->bw_current = value;
 331     lmm_update_constraint_bound(maxmin_system, nw_link->constraint,
 332                                 nw_link->bw_current);
 333   } else if (event_type == nw_link->lat_event) {
 334     double delta = value - nw_link->lat_current;
 335     lmm_variable_t var = NULL;
 336     surf_action_network_t action = NULL;
 337
 338     nw_link->lat_current = value;
 339     while (lmm_get_var_from_cnst(maxmin_system, nw_link->constraint, &var)) {
 340       action = lmm_variable_id(var);
 341       action->lat_current += delta;
 342       lmm_update_variable_bound(maxmin_system, var,
 343                                 1 / (action->lat_current));
 344     }
 345   } else if (event_type == nw_link->state_event) {
 346     if (value > 0)
 347       nw_link->state_current = SURF_NETWORK_LINK_ON;
 348     else
 349       nw_link->state_current = SURF_NETWORK_LINK_OFF;
 350   } else {
 351     CRITICAL0("Unknown event ! \n");
 352     xbt_abort();
 353   }
 354
 355   return;
 356 }
 357
 358 static surf_action_t communicate(void *src, void *dst, double size)
 359 {
 360   surf_action_network_t action = NULL;
 361   network_card_t card_src = src;
 362   network_card_t card_dst = dst;
 363   int route_size = ROUTE_SIZE(card_src->id, card_dst->id);
 364   network_link_t *route = ROUTE(card_src->id, card_dst->id);
 365   int i;
 366
 367   action = xbt_new0(s_surf_action_network_t, 1);
 368
 369   action->generic_action.cost = size;
 370   action->generic_action.remains = size;
 371   action->generic_action.max_duration = NO_MAX_DURATION;
 372   action->generic_action.start = -1.0;
 373   action->generic_action.finish = -1.0;
 374   action->generic_action.resource_type =
 375       (surf_resource_t) surf_network_resource;
 376
 377   action->generic_action.state_set =
 378       surf_network_resource->common_public->states.running_action_set;
 379
 380   xbt_swag_insert(action, action->generic_action.state_set);
 381
 382   action->latency = 0.0;
 383   for (i = 0; i < route_size; i++)
 384     action->latency += route[i]->lat_current;
 385   action->lat_current = action->latency;
 386
 387   if(action->latency>0)
 388     action->variable = lmm_variable_new(maxmin_system, action, 0.0, -1.0,
 389                                         route_size);
 390   else
 391     action->variable = lmm_variable_new(maxmin_system, action, 1.0, -1.0,
 392                                         route_size);
 393
 394   lmm_update_variable_bound(maxmin_system, action->variable,
 395                             SG_TCP_CTE_GAMMA / action->lat_current);
 396
 397   for (i = 0; i < route_size; i++)
 398     lmm_expand(maxmin_system, route[i]->constraint, action->variable, 1.0);
 399
 400   return (surf_action_t) action;
 401 }
 402
 403 static void action_suspend(surf_action_t action)
 404 {
 405   ((surf_action_network_t) action)->suspended = 1;
 406   lmm_update_variable_weight(maxmin_system,
 407                              ((surf_action_network_t) action)->variable, 0.0);
 408 }
 409
 410 static void action_resume(surf_action_t action)
 411 {
 412   lmm_update_variable_weight(maxmin_system,
 413                              ((surf_action_network_t) action)->variable, 1.0);
 414   ((surf_action_network_t) action)->suspended = 0;
 415 }
 416
 417 static int action_is_suspended(surf_action_t action)
 418 {
 419   return ((surf_action_network_t) action)->suspended;
 420 }
 421
 422 static void finalize(void)
 423 {
 424   int i,j;
 425
 426   xbt_dict_free(&network_card_set);
 427   xbt_dict_free(&network_link_set);
 428   xbt_swag_free(surf_network_resource->common_public->states.
 429                 ready_action_set);
 430   xbt_swag_free(surf_network_resource->common_public->states.
 431                 running_action_set);
 432   xbt_swag_free(surf_network_resource->common_public->states.
 433                 failed_action_set);
 434   xbt_swag_free(surf_network_resource->common_public->states.
 435                 done_action_set);
 436   xbt_free(surf_network_resource->common_public);
 437   xbt_free(surf_network_resource->common_private);
 438   xbt_free(surf_network_resource->extension_public);
 439
 440   xbt_free(surf_network_resource);
 441   surf_network_resource = NULL;
 442
 443   for (i = 0; i < card_number; i++)
 444     for (j = 0; j < card_number; j++)
 445       xbt_free(ROUTE(i,j));
 446   xbt_free(routing_table);
 447   routing_table = NULL;
 448   xbt_free(routing_table_size);
 449   routing_table_size = NULL;
 450   card_number = 0;
 451 }
 452
 453 static void surf_network_resource_init_internal(void)
 454 {
 455   s_surf_action_t action;
 456
 457   surf_network_resource = xbt_new0(s_surf_network_resource_t, 1);
 458
 459   surf_network_resource->common_private =
 460       xbt_new0(s_surf_resource_private_t, 1);
 461   surf_network_resource->common_public =
 462       xbt_new0(s_surf_resource_public_t, 1);
 463   surf_network_resource->extension_public =
 464       xbt_new0(s_surf_network_resource_extension_public_t, 1);
 465
 466   surf_network_resource->common_public->states.ready_action_set =
 467       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 468   surf_network_resource->common_public->states.running_action_set =
 469       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 470   surf_network_resource->common_public->states.failed_action_set =
 471       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 472   surf_network_resource->common_public->states.done_action_set =
 473       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 474
 475   surf_network_resource->common_public->name_service = name_service;
 476   surf_network_resource->common_public->get_resource_name =
 477       get_resource_name;
 478   surf_network_resource->common_public->action_get_state =
 479       surf_action_get_state;
 480   surf_network_resource->common_public->action_free = action_free;
 481   surf_network_resource->common_public->action_cancel = action_cancel;
 482   surf_network_resource->common_public->action_recycle = action_recycle;
 483   surf_network_resource->common_public->action_change_state =
 484       action_change_state;
 485   surf_network_resource->common_public->action_set_data = surf_action_set_data;
 486   surf_network_resource->common_public->name = "network";
 487
 488   surf_network_resource->common_private->resource_used = resource_used;
 489   surf_network_resource->common_private->share_resources = share_resources;
 490   surf_network_resource->common_private->update_actions_state =
 491       update_actions_state;
 492   surf_network_resource->common_private->update_resource_state =
 493       update_resource_state;
 494   surf_network_resource->common_private->finalize = finalize;
 495
 496   surf_network_resource->extension_public->communicate = communicate;
 497   surf_network_resource->extension_public->suspend = action_suspend;
 498   surf_network_resource->extension_public->resume = action_resume;
 499   surf_network_resource->extension_public->is_suspended = action_is_suspended;
 500
 501   network_link_set = xbt_dict_new();
 502   network_card_set = xbt_dict_new();
 503
 504   xbt_assert0(maxmin_system, "surf_init has to be called first!");
 505 }
 506
 507 /***************************************************************************/
 508 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 509 /***************************************************************************/
 510 /* @TechReport{      rr-lip2002-40, */
 511 /*   author        = {Henri Casanova and Loris Marchal}, */
 512 /*   institution   = {LIP}, */
 513 /*   title         = {A Network Model for Simulation of Grid Application}, */
 514 /*   number        = {2002-40}, */
 515 /*   month         = {oct}, */
 516 /*   year          = {2002} */
 517 /* } */
 518 void surf_network_resource_init_CM02(const char *filename)
 519 {
 520   if (surf_network_resource)
 521     return;
 522   surf_network_resource_init_internal();
 523   parse_file(filename);
 524   xbt_dynar_push(resource_list, &surf_network_resource);
 525 }