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   xbt_swag_remove(action, action->state_set);
 214   if(((surf_action_network_t)action)->variable)
 215     lmm_variable_free(maxmin_system, ((surf_action_network_t)action)->variable);
 216   xbt_free(action);
 217
 218   return;
 219 }
 220
 221 static void action_cancel(surf_action_t action)
 222 {
 223   return;
 224 }
 225
 226 static void action_recycle(surf_action_t action)
 227 {
 228   return;
 229 }
 230
 231 static void action_change_state(surf_action_t action,
 232                                 e_surf_action_state_t state)
 233 {
 234   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED))
 235     if(((surf_action_network_t)action)->variable) {
 236       lmm_variable_disable(maxmin_system, ((surf_action_network_t)action)->variable);
 237       ((surf_action_network_t)action)->variable = NULL;
 238     }
 239
 240   surf_action_change_state(action, state);
 241   return;
 242 }
 243
 244 static double share_resources(double now)
 245 {
 246   s_surf_action_network_t s_action;
 247   surf_action_network_t action = NULL;
 248   xbt_swag_t running_actions = surf_network_resource->common_public->states.running_action_set;
 249   double min = generic_maxmin_share_resources(running_actions,
 250                                               xbt_swag_offset(s_action, variable));
 251
 252   xbt_swag_foreach(action, running_actions) {
 253     if(action->latency>0) {
 254       if(min<0) min = action->latency;
 255       else if (action->latency<min) min = action->latency;
 256     }
 257   }
 258
 259   return min;
 260 }
 261
 262
 263 static void update_actions_state(double now, double delta)
 264 {
 265   double deltap = 0.0;
 266   surf_action_network_t action = NULL;
 267   surf_action_network_t next_action = NULL;
 268   xbt_swag_t running_actions =
 269       surf_network_resource->common_public->states.running_action_set;
 270   xbt_swag_t failed_actions =
 271       surf_network_resource->common_public->states.failed_action_set;
 272
 273   xbt_swag_foreach_safe(action, next_action, running_actions) {
 274     deltap = delta;
 275     if (action->latency > 0) {
 276       if (action->latency > deltap) {
 277         surf_double_update(&(action->latency),deltap);
 278         deltap = 0.0;
 279       } else {
 280         surf_double_update(&(deltap), action->latency);
 281         action->latency = 0.0;
 282       }
 283       if ((action->latency == 0.0) && !(action->suspended))
 284         lmm_update_variable_weight(maxmin_system, action->variable, 1.0);
 285     }
 286     surf_double_update(&(action->generic_action.remains),
 287         lmm_variable_getvalue(action->variable) * deltap);
 288     if (action->generic_action.max_duration != NO_MAX_DURATION)
 289       surf_double_update(&(action->generic_action.max_duration), delta);
 290
 291     /*   if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 292
 293     if (action->generic_action.remains <= 0) {
 294       action->generic_action.finish = surf_get_clock();
 295       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 296     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 297                (action->generic_action.max_duration <= 0)) {
 298       action->generic_action.finish = surf_get_clock();
 299       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 300     } else {                    /* Need to check that none of the resource has failed */
 301       lmm_constraint_t cnst = NULL;
 302       int i = 0;
 303       network_link_t nw_link = NULL;
 304
 305       while ((cnst =
 306               lmm_get_cnst_from_var(maxmin_system, action->variable,
 307                                     i++))) {
 308         nw_link = lmm_constraint_id(cnst);
 309         if (nw_link->state_current == SURF_NETWORK_LINK_OFF) {
 310           action->generic_action.finish = surf_get_clock();
 311           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 312           break;
 313         }
 314       }
 315     }
 316   }
 317
 318   return;
 319 }
 320
 321 static void update_resource_state(void *id,
 322                                   tmgr_trace_event_t event_type,
 323                                   double value)
 324 {
 325   network_link_t nw_link = id;
 326   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 327   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 328   /*     value, event_type); */
 329
 330   if (event_type == nw_link->bw_event) {
 331     nw_link->bw_current = value;
 332     lmm_update_constraint_bound(maxmin_system, nw_link->constraint,
 333                                 nw_link->bw_current);
 334   } else if (event_type == nw_link->lat_event) {
 335     double delta = value - nw_link->lat_current;
 336     lmm_variable_t var = NULL;
 337     surf_action_network_t action = NULL;
 338
 339     nw_link->lat_current = value;
 340     while (lmm_get_var_from_cnst(maxmin_system, nw_link->constraint, &var)) {
 341       action = lmm_variable_id(var);
 342       action->lat_current += delta;
 343       if(action->rate<0)
 344         lmm_update_variable_bound(maxmin_system, action->variable,
 345                                   SG_TCP_CTE_GAMMA / action->lat_current);
 346       else
 347         lmm_update_variable_bound(maxmin_system, action->variable,
 348                                   min(action->rate,SG_TCP_CTE_GAMMA / action->lat_current));
 349     }
 350   } else if (event_type == nw_link->state_event) {
 351     if (value > 0)
 352       nw_link->state_current = SURF_NETWORK_LINK_ON;
 353     else
 354       nw_link->state_current = SURF_NETWORK_LINK_OFF;
 355   } else {
 356     CRITICAL0("Unknown event ! \n");
 357     xbt_abort();
 358   }
 359
 360   return;
 361 }
 362
 363 static surf_action_t communicate(void *src, void *dst, double size, double rate)
 364 {
 365   surf_action_network_t action = NULL;
 366   network_card_t card_src = src;
 367   network_card_t card_dst = dst;
 368   int route_size = ROUTE_SIZE(card_src->id, card_dst->id);
 369   network_link_t *route = ROUTE(card_src->id, card_dst->id);
 370   int i;
 371
 372   action = xbt_new0(s_surf_action_network_t, 1);
 373
 374   action->generic_action.cost = size;
 375   action->generic_action.remains = size;
 376   action->generic_action.max_duration = NO_MAX_DURATION;
 377   action->generic_action.start = -1.0;
 378   action->generic_action.finish = -1.0;
 379   action->generic_action.resource_type =
 380       (surf_resource_t) surf_network_resource;
 381
 382   action->generic_action.state_set =
 383       surf_network_resource->common_public->states.running_action_set;
 384
 385   xbt_swag_insert(action, action->generic_action.state_set);
 386   action->rate = rate;
 387
 388   action->latency = 0.0;
 389   for (i = 0; i < route_size; i++)
 390     action->latency += route[i]->lat_current;
 391   action->lat_current = action->latency;
 392
 393   if(action->latency>0)
 394     action->variable = lmm_variable_new(maxmin_system, action, 0.0, -1.0,
 395                                         route_size);
 396   else
 397     action->variable = lmm_variable_new(maxmin_system, action, 1.0, -1.0,
 398                                         route_size);
 399
 400   if(action->rate<0)
 401     lmm_update_variable_bound(maxmin_system, action->variable,
 402                               SG_TCP_CTE_GAMMA / action->lat_current);
 403   else
 404     lmm_update_variable_bound(maxmin_system, action->variable,
 405                               min(action->rate,SG_TCP_CTE_GAMMA / action->lat_current));
 406
 407   if(route_size == 0) {
 408     action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 409   }
 410
 411   for (i = 0; i < route_size; i++)
 412     lmm_expand(maxmin_system, route[i]->constraint, action->variable, 1.0);
 413
 414   return (surf_action_t) action;
 415 }
 416
 417 static void action_suspend(surf_action_t action)
 418 {
 419   ((surf_action_network_t) action)->suspended = 1;
 420   lmm_update_variable_weight(maxmin_system,
 421                              ((surf_action_network_t) action)->variable, 0.0);
 422 }
 423
 424 static void action_resume(surf_action_t action)
 425 {
 426   lmm_update_variable_weight(maxmin_system,
 427                              ((surf_action_network_t) action)->variable, 1.0);
 428   ((surf_action_network_t) action)->suspended = 0;
 429 }
 430
 431 static int action_is_suspended(surf_action_t action)
 432 {
 433   return ((surf_action_network_t) action)->suspended;
 434 }
 435
 436 static void finalize(void)
 437 {
 438   int i,j;
 439
 440   xbt_dict_free(&network_card_set);
 441   xbt_dict_free(&network_link_set);
 442   xbt_swag_free(surf_network_resource->common_public->states.
 443                 ready_action_set);
 444   xbt_swag_free(surf_network_resource->common_public->states.
 445                 running_action_set);
 446   xbt_swag_free(surf_network_resource->common_public->states.
 447                 failed_action_set);
 448   xbt_swag_free(surf_network_resource->common_public->states.
 449                 done_action_set);
 450   xbt_free(surf_network_resource->common_public);
 451   xbt_free(surf_network_resource->common_private);
 452   xbt_free(surf_network_resource->extension_public);
 453
 454   xbt_free(surf_network_resource);
 455   surf_network_resource = NULL;
 456
 457   for (i = 0; i < card_number; i++)
 458     for (j = 0; j < card_number; j++)
 459       xbt_free(ROUTE(i,j));
 460   xbt_free(routing_table);
 461   routing_table = NULL;
 462   xbt_free(routing_table_size);
 463   routing_table_size = NULL;
 464   card_number = 0;
 465 }
 466
 467 static void surf_network_resource_init_internal(void)
 468 {
 469   s_surf_action_t action;
 470
 471   surf_network_resource = xbt_new0(s_surf_network_resource_t, 1);
 472
 473   surf_network_resource->common_private =
 474       xbt_new0(s_surf_resource_private_t, 1);
 475   surf_network_resource->common_public =
 476       xbt_new0(s_surf_resource_public_t, 1);
 477   surf_network_resource->extension_public =
 478       xbt_new0(s_surf_network_resource_extension_public_t, 1);
 479
 480   surf_network_resource->common_public->states.ready_action_set =
 481       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 482   surf_network_resource->common_public->states.running_action_set =
 483       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 484   surf_network_resource->common_public->states.failed_action_set =
 485       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 486   surf_network_resource->common_public->states.done_action_set =
 487       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 488
 489   surf_network_resource->common_public->name_service = name_service;
 490   surf_network_resource->common_public->get_resource_name =
 491       get_resource_name;
 492   surf_network_resource->common_public->action_get_state =
 493       surf_action_get_state;
 494   surf_network_resource->common_public->action_free = action_free;
 495   surf_network_resource->common_public->action_cancel = action_cancel;
 496   surf_network_resource->common_public->action_recycle = action_recycle;
 497   surf_network_resource->common_public->action_change_state =
 498       action_change_state;
 499   surf_network_resource->common_public->action_set_data = surf_action_set_data;
 500   surf_network_resource->common_public->name = "network";
 501
 502   surf_network_resource->common_private->resource_used = resource_used;
 503   surf_network_resource->common_private->share_resources = share_resources;
 504   surf_network_resource->common_private->update_actions_state =
 505       update_actions_state;
 506   surf_network_resource->common_private->update_resource_state =
 507       update_resource_state;
 508   surf_network_resource->common_private->finalize = finalize;
 509
 510   surf_network_resource->common_public->suspend = action_suspend;
 511   surf_network_resource->common_public->resume = action_resume;
 512   surf_network_resource->common_public->is_suspended = action_is_suspended;
 513
 514   surf_network_resource->extension_public->communicate = communicate;
 515
 516   network_link_set = xbt_dict_new();
 517   network_card_set = xbt_dict_new();
 518
 519   xbt_assert0(maxmin_system, "surf_init has to be called first!");
 520 }
 521
 522 /***************************************************************************/
 523 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 524 /***************************************************************************/
 525 /* @TechReport{      rr-lip2002-40, */
 526 /*   author        = {Henri Casanova and Loris Marchal}, */
 527 /*   institution   = {LIP}, */
 528 /*   title         = {A Network Model for Simulation of Grid Application}, */
 529 /*   number        = {2002-40}, */
 530 /*   month         = {oct}, */
 531 /*   year          = {2002} */
 532 /* } */
 533 void surf_network_resource_init_CM02(const char *filename)
 534 {
 535   if (surf_network_resource)
 536     return;
 537   surf_network_resource_init_internal();
 538   parse_file(filename);
 539   xbt_dynar_push(resource_list, &surf_network_resource);
 540 }