src/surf/network_im.c

   1
   2 /*
   3  * Network with improved management of tasks, IM (Improved Management).
   4  * Uses a heap to store actions so that the share_resources is faster.
   5  * This model automatically sets the selective update flag to 1 and is
   6  * highly dependent on the maxmin lmm module.
   7  */
   8
   9 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
  10  * All rights reserved.                                                     */
  11
  12 /* This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the license (GNU LGPL) which comes with this package. */
  14
  15 #include "xbt/log.h"
  16 #include "xbt/str.h"
  17 #include "surf_private.h"
  18 #include "xbt/dict.h"
  19 #include "maxmin_private.h"
  20
  21 #undef GENERIC_ACTION
  22 #define GENERIC_ACTION(action) action->generic_action
  23
  24
  25 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_im, surf,
  26                                 "Logging specific to the SURF network module");
  27
  28
  29 enum heap_action_type{
  30   LATENCY = 100,
  31   MAX_DURATION,
  32   NORMAL,
  33   NOTSET
  34 };
  35
  36 typedef struct surf_action_network_CM02_im {
  37   s_surf_action_t generic_action;
  38   s_xbt_swag_hookup_t action_list_hookup;
  39   double latency;
  40   double lat_current;
  41   double weight;
  42   lmm_variable_t variable;
  43   double rate;
  44 #ifdef HAVE_LATENCY_BOUND_TRACKING
  45   int latency_limited;
  46 #endif
  47   int suspended;
  48 #ifdef HAVE_TRACING
  49   char *src_name;
  50   char *dst_name;
  51 #endif
  52   int index_heap;
  53   enum heap_action_type hat;
  54   double last_update;
  55 } s_surf_action_network_CM02_im_t, *surf_action_network_CM02_im_t;
  56
  57
  58 typedef struct network_link_CM02_im {
  59   s_surf_resource_lmm_t lmm_resource;   /* must remain first to be added to a trace */
  60
  61   /* Using this object with the public part of
  62      model does not make sense */
  63   double lat_current;
  64   tmgr_trace_event_t lat_event;
  65 } s_link_CM02_im_t, *link_CM02_im_t;
  66
  67
  68
  69
  70
  71
  72
  73
  74 extern surf_model_t surf_network_model;
  75 static lmm_system_t network_maxmin_system = NULL;
  76 static void (*network_solve) (lmm_system_t) = NULL;
  77
  78 extern double sg_latency_factor;
  79 extern double sg_bandwidth_factor;
  80 extern double sg_weight_S_parameter;
  81
  82 extern double sg_tcp_gamma;
  83 extern int sg_network_fullduplex;
  84
  85
  86 static void im_net_action_recycle(surf_action_t action);
  87 static int im_net_get_link_latency_limited(surf_action_t action);
  88 static int im_net_action_is_suspended(surf_action_t action);
  89 static double im_net_action_get_remains(surf_action_t action);
  90 static void im_net_action_set_max_duration(surf_action_t action, double duration);
  91 static void surf_network_model_init_CM02_im(const char *filename);
  92 static void im_net_update_actions_state(double now, double delta);
  93 static void update_action_remaining(double now);
  94
  95 static xbt_swag_t im_net_modified_set = NULL;
  96 static xbt_heap_t im_net_action_heap = NULL;
  97 xbt_swag_t keep_track = NULL;
  98 extern int sg_maxmin_selective_update;
  99
 100 /* added to manage the communication action's heap */
 101 static void im_net_action_update_index_heap(void *action, int i)
 102 {
 103   ((surf_action_network_CM02_im_t) action)->index_heap = i;
 104 }
 105
 106 /* insert action on heap using a given key and a hat (heap_action_type)
 107  * a hat can be of three types for communications:
 108  *
 109  * NORMAL = this is a normal heap entry stating the date to finish transmitting
 110  * LATENCY = this is a heap entry to warn us when the latency is payed
 111  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
 112  */
 113 static void heap_insert(surf_action_network_CM02_im_t    action, double key, enum heap_action_type hat){
 114   action->hat = hat;
 115   xbt_heap_push(im_net_action_heap, action, key);
 116 }
 117
 118 static void heap_remove(surf_action_network_CM02_im_t action){
 119   action->hat = NONE;
 120   if(((surf_action_network_CM02_im_t) action)->index_heap >= 0){
 121       xbt_heap_remove(im_net_action_heap,action->index_heap);
 122   }
 123 }
 124
 125 /******************************************************************************/
 126 /*                           Factors callbacks                                */
 127 /******************************************************************************/
 128 static double im_constant_latency_factor(double size)
 129 {
 130   return sg_latency_factor;
 131 }
 132
 133 static double im_constant_bandwidth_factor(double size)
 134 {
 135   return sg_bandwidth_factor;
 136 }
 137
 138 static double im_constant_bandwidth_constraint(double rate, double bound,
 139                                             double size)
 140 {
 141   return rate;
 142 }
 143
 144
 145 static double (*latency_factor_callback) (double) =
 146     &im_constant_latency_factor;
 147 static double (*bandwidth_factor_callback) (double) =
 148     &im_constant_bandwidth_factor;
 149 static double (*bandwidth_constraint_callback) (double, double, double) =
 150     &im_constant_bandwidth_constraint;
 151
 152
 153 static link_CM02_im_t im_net_link_new(char *name,
 154                                 double bw_initial,
 155                                 tmgr_trace_t bw_trace,
 156                                 double lat_initial,
 157                                 tmgr_trace_t lat_trace,
 158                                 e_surf_resource_state_t
 159                                 state_initial,
 160                                 tmgr_trace_t state_trace,
 161                                 e_surf_link_sharing_policy_t
 162                                 policy, xbt_dict_t properties)
 163 {
 164   link_CM02_im_t nw_link = (link_CM02_im_t)
 165       surf_resource_lmm_new(sizeof(s_link_CM02_im_t),
 166                             surf_network_model, name, properties,
 167                             network_maxmin_system,
 168                             sg_bandwidth_factor * bw_initial,
 169                             history,
 170                             state_initial, state_trace,
 171                             bw_initial, bw_trace);
 172
 173   xbt_assert1(!xbt_dict_get_or_null
 174               (surf_network_model->resource_set, name),
 175               "Link '%s' declared several times in the platform file.",
 176               name);
 177
 178   nw_link->lat_current = lat_initial;
 179   if (lat_trace)
 180     nw_link->lat_event =
 181         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 182
 183   if (policy == SURF_LINK_FATPIPE)
 184     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 185
 186   xbt_dict_set(surf_network_model->resource_set, name, nw_link,
 187                surf_resource_free);
 188 #ifdef HAVE_TRACING
 189   TRACE_surf_link_declaration(nw_link, name, bw_initial, lat_initial);
 190 #endif
 191
 192   return nw_link;
 193 }
 194
 195 static void im_net_parse_link_init(void)
 196 {
 197   char *name_link;
 198   double bw_initial;
 199   tmgr_trace_t bw_trace;
 200   double lat_initial;
 201   tmgr_trace_t lat_trace;
 202   e_surf_resource_state_t state_initial_link = SURF_RESOURCE_ON;
 203   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 204   tmgr_trace_t state_trace;
 205   DEBUG0("link_CM02_im");
 206   name_link = xbt_strdup(A_surfxml_link_id);
 207   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 208   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
 209   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 210   lat_trace = tmgr_trace_new(A_surfxml_link_latency_file);
 211
 212   xbt_assert0((A_surfxml_link_state == A_surfxml_link_state_ON)
 213               || (A_surfxml_link_state ==
 214                   A_surfxml_link_state_OFF), "Invalid state");
 215   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 216     state_initial_link = SURF_RESOURCE_ON;
 217   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
 218     state_initial_link = SURF_RESOURCE_OFF;
 219
 220   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
 221     policy_initial_link = SURF_LINK_SHARED;
 222   else
 223           {
 224           if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FATPIPE)
 225                   policy_initial_link = SURF_LINK_FATPIPE;
 226           else if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FULLDUPLEX)
 227                   policy_initial_link = SURF_LINK_FULLDUPLEX;
 228           }
 229
 230   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 231
 232   if(policy_initial_link == SURF_LINK_FULLDUPLEX)
 233   {
 234           im_net_link_new(bprintf("%s_UP",name_link), bw_initial, bw_trace,
 235                        lat_initial, lat_trace, state_initial_link, state_trace,
 236                        policy_initial_link, xbt_dict_new());
 237           im_net_link_new(bprintf("%s_DOWN",name_link), bw_initial, bw_trace,
 238                        lat_initial, lat_trace, state_initial_link, state_trace,
 239                        policy_initial_link, xbt_dict_new());
 240   }
 241   else
 242   {
 243           im_net_link_new(name_link, bw_initial, bw_trace,
 244                        lat_initial, lat_trace, state_initial_link, state_trace,
 245                        policy_initial_link, xbt_dict_new());
 246   }
 247
 248 }
 249
 250 static void im_net_create_resource(char *name,
 251                                 double bw_initial,
 252                                 tmgr_trace_t bw_trace,
 253                                 double lat_initial,
 254                                 tmgr_trace_t lat_trace,
 255                                 e_surf_resource_state_t
 256                                 state_initial,
 257                                 tmgr_trace_t state_trace,
 258                                 e_surf_link_sharing_policy_t policy,
 259                                 xbt_dict_t properties)
 260 {
 261   im_net_link_new(name, bw_initial, bw_trace,
 262                lat_initial, lat_trace, state_initial, state_trace,
 263                policy, xbt_dict_new());
 264 }
 265
 266 static void im_net_add_traces(void)
 267 {
 268   xbt_dict_cursor_t cursor = NULL;
 269   char *trace_name, *elm;
 270
 271   static int called = 0;
 272   if (called)
 273     return;
 274   called = 1;
 275
 276   /* connect all traces relative to network */
 277   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 278     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 279     link_CM02_im_t link =
 280         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 281
 282     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 283                 trace_name, elm);
 284     xbt_assert2(trace,
 285                 "Cannot connect trace %s to link %s: trace undefined",
 286                 trace_name, elm);
 287
 288     link->lmm_resource.state_event =
 289         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 290   }
 291
 292   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 293     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 294     link_CM02_im_t link =
 295         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 296
 297     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 298                 trace_name, elm);
 299     xbt_assert2(trace,
 300                 "Cannot connect trace %s to link %s: trace undefined",
 301                 trace_name, elm);
 302
 303     link->lmm_resource.power.event =
 304         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 305   }
 306
 307   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 308     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 309     link_CM02_im_t link =
 310         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 311
 312     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 313                 trace_name, elm);
 314     xbt_assert2(trace,
 315                 "Cannot connect trace %s to link %s: trace undefined",
 316                 trace_name, elm);
 317
 318     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 319   }
 320 }
 321
 322 static void im_net_define_callbacks(const char *file)
 323 {
 324   /* Figuring out the network links */
 325   surfxml_add_callback(STag_surfxml_link_cb_list, &im_net_parse_link_init);
 326   surfxml_add_callback(ETag_surfxml_platform_cb_list, &im_net_add_traces);
 327 }
 328
 329 static int im_net_resource_used(void *resource_id)
 330 {
 331   return lmm_constraint_used(network_maxmin_system,
 332                              ((surf_resource_lmm_t)
 333                               resource_id)->constraint);
 334 }
 335
 336 static int im_net_action_unref(surf_action_t action)
 337 {
 338   action->refcount--;
 339   if (!action->refcount) {
 340     xbt_swag_remove(action, action->state_set);
 341     if (((surf_action_network_CM02_im_t) action)->variable){
 342       lmm_variable_free(network_maxmin_system,
 343                         ((surf_action_network_CM02_im_t) action)->variable);
 344     }
 345     // remove action from the heap
 346     heap_remove((surf_action_network_CM02_im_t) action);
 347
 348     xbt_swag_remove(action, im_net_modified_set);
 349 #ifdef HAVE_TRACING
 350     xbt_free(((surf_action_network_CM02_im_t) action)->src_name);
 351     xbt_free(((surf_action_network_CM02_im_t) action)->dst_name);
 352     if (action->category)
 353       xbt_free(action->category);
 354 #endif
 355     free(action);
 356     action = NULL;
 357     return 1;
 358   }
 359   return 0;
 360 }
 361
 362
 363
 364 static void im_net_action_cancel(surf_action_t action)
 365 {
 366   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 367
 368   xbt_swag_remove(action, im_net_modified_set);
 369   // remove action from the heap
 370   heap_remove((surf_action_network_CM02_im_t) action);
 371 }
 372
 373 void im_net_action_recycle(surf_action_t action)
 374 {
 375   return;
 376 }
 377
 378 #ifdef HAVE_LATENCY_BOUND_TRACKING
 379 int im_net_get_link_latency_limited(surf_action_t action)
 380 {
 381   return action->latency_limited;
 382 }
 383 #endif
 384
 385 double im_net_action_get_remains(surf_action_t action)
 386 {
 387   /* update remains before return it */
 388   update_action_remaining(surf_get_clock());
 389   return action->remains;
 390 }
 391
 392 static void update_action_remaining(double now){
 393   surf_action_network_CM02_im_t action = NULL;
 394   double delta = 0.0;
 395
 396   xbt_swag_foreach(action, im_net_modified_set) {
 397
 398     if(action->suspended != 0){
 399         continue;
 400     }
 401
 402     delta = now - action->last_update;
 403
 404     double_update(&(action->generic_action.remains),
 405                   lmm_variable_getvalue(action->variable) * delta);
 406
 407     if (action->generic_action.max_duration != NO_MAX_DURATION)
 408       double_update(&(action->generic_action.max_duration), delta);
 409
 410     if ((action->generic_action.remains <= 0) &&
 411         (lmm_get_variable_weight(action->variable) > 0)) {
 412       action->generic_action.finish = surf_get_clock();
 413       surf_network_model->action_state_set((surf_action_t) action,
 414                                            SURF_ACTION_DONE);
 415       heap_remove(action);
 416     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 417                && (action->generic_action.max_duration <= 0)) {
 418       action->generic_action.finish = surf_get_clock();
 419       surf_network_model->action_state_set((surf_action_t) action,
 420                                            SURF_ACTION_DONE);
 421       heap_remove(action);
 422     }
 423
 424     action->last_update = now;
 425   }
 426 }
 427
 428 static double im_net_share_resources(double now)
 429 {
 430   surf_action_network_CM02_im_t action = NULL;
 431   double min=-1;
 432   double value;
 433
 434   DEBUG1("Before share resources, the size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 435   update_action_remaining(now);
 436
 437   lmm_solve(network_maxmin_system);
 438
 439   DEBUG1("After share resources, The size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 440
 441    xbt_swag_foreach(action, im_net_modified_set) {
 442      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 443        continue;
 444      }
 445
 446      /* bogus priority, skip it */
 447      if (GENERIC_ACTION(action).priority <= 0){
 448          continue;
 449      }
 450
 451      min = -1;
 452      value = lmm_variable_getvalue(action->variable);
 453      if (value > 0) {
 454          if (GENERIC_ACTION(action).remains > 0) {
 455              value = GENERIC_ACTION(action).remains / value;
 456              min = now + value;
 457          } else {
 458              value = 0.0;
 459              min = now;
 460          }
 461      }
 462
 463      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 464          && (min == -1
 465              || GENERIC_ACTION(action).start +
 466              GENERIC_ACTION(action).max_duration < min)){
 467        min =   GENERIC_ACTION(action).start +
 468                GENERIC_ACTION(action).max_duration;
 469      }
 470
 471      DEBUG4("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 472                 GENERIC_ACTION(action).start, now + value,
 473                 GENERIC_ACTION(action).max_duration);
 474
 475
 476
 477      if (action->index_heap >= 0) {
 478          heap_remove((surf_action_network_CM02_im_t) action);
 479      }
 480
 481      if (min != -1) {
 482          heap_insert((surf_action_network_CM02_im_t) action, min, NORMAL);
 483          DEBUG3("Insert at heap action(%p) min %lf now %lf", action, min, now);
 484      }
 485    }
 486
 487    //hereafter must have already the min value for this resource model
 488    if(xbt_heap_size(im_net_action_heap) > 0 ){
 489        min = xbt_heap_maxkey(im_net_action_heap) - now ;
 490    }else{
 491        min = -1;
 492    }
 493
 494    DEBUG1("The minimum with the HEAP %lf", min);
 495
 496
 497   return min;
 498 }
 499
 500 static void im_net_update_actions_state(double now, double delta)
 501 {
 502   surf_action_network_CM02_im_t action = NULL;
 503
 504   while ((xbt_heap_size(im_net_action_heap) > 0)
 505          && (double_equals(xbt_heap_maxkey(im_net_action_heap), now))) {
 506     action = xbt_heap_pop(im_net_action_heap);
 507     DEBUG1("Action %p: finish", action);
 508     GENERIC_ACTION(action).finish = surf_get_clock();
 509
 510     // if I am wearing a latency heat
 511     if( action->hat ==  LATENCY){
 512         lmm_update_variable_weight(network_maxmin_system, action->variable,
 513                                            action->weight);
 514         heap_remove(action);
 515         action->last_update = surf_get_clock();
 516
 517         DEBUG1("Action (%p) is not limited by latency anymore", action);
 518 #ifdef HAVE_LATENCY_BOUND_TRACKING
 519           GENERIC_ACTION(action).latency_limited = 0;
 520 #endif
 521
 522     // if I am wearing a max_duration or normal hat
 523     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 524         // no need to communicate anymore
 525         // assume that flows that reached max_duration have remaining of 0
 526         GENERIC_ACTION(action).remains = 0;
 527         action->generic_action.finish = surf_get_clock();
 528               surf_network_model->action_state_set((surf_action_t) action,
 529                                                    SURF_ACTION_DONE);
 530         heap_remove(action);
 531     }
 532   }
 533   return;
 534 }
 535
 536 static void im_net_update_resource_state(void *id,
 537                                       tmgr_trace_event_t event_type,
 538                                       double value, double date)
 539 {
 540   link_CM02_im_t nw_link = id;
 541   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 542   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 543   /*     value, event_type); */
 544
 545   if (event_type == nw_link->lmm_resource.power.event) {
 546     double delta =
 547         sg_weight_S_parameter / value - sg_weight_S_parameter /
 548         (nw_link->lmm_resource.power.peak *
 549          nw_link->lmm_resource.power.scale);
 550     lmm_variable_t var = NULL;
 551     lmm_element_t elem = NULL;
 552     surf_action_network_CM02_im_t action = NULL;
 553
 554     nw_link->lmm_resource.power.peak = value;
 555     lmm_update_constraint_bound(network_maxmin_system,
 556                                 nw_link->lmm_resource.constraint,
 557                                 sg_bandwidth_factor *
 558                                 (nw_link->lmm_resource.power.peak *
 559                                  nw_link->lmm_resource.power.scale));
 560 #ifdef HAVE_TRACING
 561     TRACE_surf_link_set_bandwidth(date, nw_link,
 562                                   sg_bandwidth_factor *
 563                                   (nw_link->lmm_resource.power.peak *
 564                                    nw_link->lmm_resource.power.scale));
 565 #endif
 566     if (sg_weight_S_parameter > 0) {
 567       while ((var = lmm_get_var_from_cnst
 568               (network_maxmin_system, nw_link->lmm_resource.constraint,
 569                &elem))) {
 570         action = lmm_variable_id(var);
 571         action->weight += delta;
 572         if (!(action->suspended))
 573           lmm_update_variable_weight(network_maxmin_system,
 574                                      action->variable, action->weight);
 575       }
 576     }
 577     if (tmgr_trace_event_free(event_type))
 578       nw_link->lmm_resource.power.event = NULL;
 579   } else if (event_type == nw_link->lat_event) {
 580     double delta = value - nw_link->lat_current;
 581     lmm_variable_t var = NULL;
 582     lmm_element_t elem = NULL;
 583     surf_action_network_CM02_im_t action = NULL;
 584
 585     nw_link->lat_current = value;
 586     while ((var = lmm_get_var_from_cnst
 587             (network_maxmin_system, nw_link->lmm_resource.constraint,
 588              &elem))) {
 589       action = lmm_variable_id(var);
 590       action->lat_current += delta;
 591       action->weight += delta;
 592       if (action->rate < 0)
 593         lmm_update_variable_bound(network_maxmin_system, action->variable,
 594                                   sg_tcp_gamma / (2.0 *
 595                                                   action->lat_current));
 596       else {
 597         lmm_update_variable_bound(network_maxmin_system, action->variable,
 598                                   min(action->rate,
 599                                       sg_tcp_gamma / (2.0 *
 600                                                       action->lat_current)));
 601
 602         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 603           INFO0("Flow is limited BYBANDWIDTH");
 604         } else {
 605           INFO1("Flow is limited BYLATENCY, latency of flow is %f",
 606                 action->lat_current);
 607         }
 608       }
 609       if (!(action->suspended))
 610         lmm_update_variable_weight(network_maxmin_system, action->variable,
 611                                    action->weight);
 612
 613     }
 614     if (tmgr_trace_event_free(event_type))
 615       nw_link->lat_event = NULL;
 616   } else if (event_type == nw_link->lmm_resource.state_event) {
 617     if (value > 0)
 618       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 619     else {
 620       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 621       lmm_variable_t var = NULL;
 622       lmm_element_t elem = NULL;
 623
 624       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 625       while ((var = lmm_get_var_from_cnst
 626               (network_maxmin_system, cnst, &elem))) {
 627         surf_action_t action = lmm_variable_id(var);
 628
 629         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 630             surf_action_state_get(action) == SURF_ACTION_READY) {
 631           action->finish = date;
 632           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 633         }
 634       }
 635     }
 636     if (tmgr_trace_event_free(event_type))
 637       nw_link->lmm_resource.state_event = NULL;
 638   } else {
 639     CRITICAL0("Unknown event ! \n");
 640     xbt_abort();
 641   }
 642
 643   DEBUG1("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 644   return;
 645 }
 646
 647
 648 static surf_action_t im_net_communicate(const char *src_name,
 649                                      const char *dst_name, double size,
 650                                      double rate)
 651 {
 652   unsigned int i;
 653   link_CM02_im_t link;
 654   int failed = 0;
 655   surf_action_network_CM02_im_t action = NULL;
 656   double bandwidth_bound;
 657   /* LARGE PLATFORMS HACK:
 658      Add a link_CM02_im_t *link and a int link_nb to network_card_CM02_im_t. It will represent local links for this node
 659      Use the cluster_id for ->id */
 660
 661   xbt_dynar_t back_route = NULL;
 662   int constraints_per_variable = 0;
 663   // I will need this route for some time so let's call get_route_no_cleanup
 664   xbt_dynar_t route = global_routing->get_route_no_cleanup(src_name, dst_name);
 665
 666
 667   if (sg_network_fullduplex == 1) {
 668     back_route = global_routing->get_route(dst_name, src_name);
 669   }
 670
 671   /* LARGE PLATFORMS HACK:
 672      total_route_size = route_size + src->link_nb + dst->nb */
 673
 674   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 675   /* LARGE PLATFORMS HACK:
 676      assert on total_route_size */
 677   xbt_assert2(xbt_dynar_length(route),
 678               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 679               src_name, dst_name);
 680
 681   xbt_dynar_foreach(route, i, link) {
 682     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 683       failed = 1;
 684       break;
 685     }
 686   }
 687   action =
 688       surf_action_new(sizeof(s_surf_action_network_CM02_im_t), size,
 689                       surf_network_model, failed);
 690
 691
 692 #ifdef HAVE_LATENCY_BOUND_TRACKING
 693   (action->generic_action).latency_limited = 0;
 694 #endif
 695
 696   xbt_swag_insert(action, action->generic_action.state_set);
 697   action->rate = rate;
 698   action->index_heap = -1;
 699   action->latency = 0.0;
 700   action->weight = 0.0;
 701   action->last_update = surf_get_clock();
 702
 703   bandwidth_bound = -1.0;
 704   xbt_dynar_foreach(route, i, link) {
 705     action->latency += link->lat_current;
 706     action->weight +=
 707         link->lat_current +
 708         sg_weight_S_parameter /
 709         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 710     if (bandwidth_bound < 0.0)
 711       bandwidth_bound =
 712           (*bandwidth_factor_callback) (size) *
 713           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 714     else
 715       bandwidth_bound =
 716           min(bandwidth_bound,
 717               (*bandwidth_factor_callback) (size) *
 718               (link->lmm_resource.power.peak *
 719                link->lmm_resource.power.scale));
 720   }
 721   /* LARGE PLATFORMS HACK:
 722      Add src->link and dst->link latencies */
 723   action->lat_current = action->latency;
 724   action->latency *= (*latency_factor_callback) (size);
 725   action->rate =
 726       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 727                                         size);
 728
 729   /* LARGE PLATFORMS HACK:
 730      lmm_variable_new(..., total_route_size) */
 731   if (back_route != NULL) {
 732     constraints_per_variable =
 733         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 734   } else {
 735     constraints_per_variable = xbt_dynar_length(route);
 736   }
 737
 738   if (action->latency > 0){
 739       action->variable =
 740         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 741                          constraints_per_variable);
 742     // add to the heap the event when the latency is payed
 743     DEBUG2("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 744     heap_insert(action, action->latency + action->last_update, LATENCY);
 745 #ifdef HAVE_LATENCY_BOUND_TRACKING
 746         (action->generic_action).latency_limited = 1;
 747 #endif
 748   }
 749   else
 750     action->variable =
 751         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 752                          constraints_per_variable);
 753
 754   if (action->rate < 0) {
 755     if (action->lat_current > 0)
 756       lmm_update_variable_bound(network_maxmin_system, action->variable,
 757                                 sg_tcp_gamma / (2.0 *
 758                                                 action->lat_current));
 759     else
 760       lmm_update_variable_bound(network_maxmin_system, action->variable,
 761                                 -1.0);
 762   } else {
 763     if (action->lat_current > 0)
 764       lmm_update_variable_bound(network_maxmin_system, action->variable,
 765                                 min(action->rate,
 766                                     sg_tcp_gamma / (2.0 *
 767                                                     action->lat_current)));
 768     else
 769       lmm_update_variable_bound(network_maxmin_system, action->variable,
 770                                 action->rate);
 771   }
 772
 773   xbt_dynar_foreach(route, i, link) {
 774     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 775                action->variable, 1.0);
 776   }
 777
 778   if (sg_network_fullduplex == 1) {
 779     DEBUG1("Fullduplex active adding backward flow using 5%c", '%');
 780     xbt_dynar_foreach(back_route, i, link) {
 781       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 782                  action->variable, .05);
 783     }
 784   }
 785
 786   /* LARGE PLATFORMS HACK:
 787      expand also with src->link and dst->link */
 788 #ifdef HAVE_TRACING
 789   action->src_name = xbt_new(char, strlen(src_name) + 1);
 790   strncpy(action->src_name, src_name, strlen(src_name) + 1);
 791
 792   action->dst_name = xbt_new(char, strlen(dst_name) + 1);
 793   strncpy(action->dst_name, dst_name, strlen(dst_name) + 1);
 794 #endif
 795
 796   xbt_dynar_free(&route);
 797   XBT_OUT;
 798
 799   return (surf_action_t) action;
 800 }
 801
 802 static xbt_dynar_t im_net_get_route(const char *src, const char *dst)
 803 {
 804   return global_routing->get_route(src, dst);
 805 }
 806
 807 static double im_net_get_link_bandwidth(const void *link)
 808 {
 809   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 810   return lmm->power.peak * lmm->power.scale;
 811 }
 812
 813 static double im_net_get_link_latency(const void *link)
 814 {
 815   return ((link_CM02_im_t) link)->lat_current;
 816 }
 817
 818 static int im_net_link_shared(const void *link)
 819 {
 820   return
 821       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 822 }
 823
 824 static void im_net_action_suspend(surf_action_t action)
 825 {
 826   ((surf_action_network_CM02_im_t) action)->suspended = 1;
 827   lmm_update_variable_weight(network_maxmin_system,
 828                              ((surf_action_network_CM02_im_t)
 829                               action)->variable, 0.0);
 830
 831   // remove action from the heap
 832   heap_remove((surf_action_network_CM02_im_t) action);
 833 }
 834
 835 static void im_net_action_resume(surf_action_t action)
 836 {
 837   if (((surf_action_network_CM02_im_t) action)->suspended) {
 838     lmm_update_variable_weight(network_maxmin_system,
 839                                ((surf_action_network_CM02_im_t)
 840                                 action)->variable,
 841                                ((surf_action_network_CM02_im_t)
 842                                 action)->weight);
 843     ((surf_action_network_CM02_im_t) action)->suspended = 0;
 844     // remove action from the heap
 845     heap_remove((surf_action_network_CM02_im_t) action);
 846   }
 847 }
 848
 849 static int im_net_action_is_suspended(surf_action_t action)
 850 {
 851   return ((surf_action_network_CM02_im_t) action)->suspended;
 852 }
 853
 854 void im_net_action_set_max_duration(surf_action_t action, double duration)
 855 {
 856   action->max_duration = duration;
 857   // remove action from the heap
 858   heap_remove((surf_action_network_CM02_im_t) action);
 859 }
 860
 861
 862 static void im_net_finalize(void)
 863 {
 864   surf_model_exit(surf_network_model);
 865   surf_network_model = NULL;
 866
 867   global_routing->finalize();
 868
 869   lmm_system_free(network_maxmin_system);
 870   network_maxmin_system = NULL;
 871
 872   xbt_heap_free(im_net_action_heap);
 873   xbt_swag_free(im_net_modified_set);
 874
 875 }
 876
 877 static void im_surf_network_model_init_internal(void)
 878 {
 879   s_surf_action_network_CM02_im_t comm;
 880   INFO0("You are using the UNSAFE lazy management optimization, I hope you know what you are doing.");
 881   INFO0("====> For now this optimization is only available for LV08_im network model.");
 882
 883   surf_network_model = surf_model_init();
 884
 885   surf_network_model->name = "network";
 886   surf_network_model->action_unref = im_net_action_unref;
 887   surf_network_model->action_cancel = im_net_action_cancel;
 888   surf_network_model->action_recycle = im_net_action_recycle;
 889   surf_network_model->get_remains = im_net_action_get_remains;
 890 #ifdef HAVE_LATENCY_BOUND_TRACKING
 891   surf_network_model->get_latency_limited = im_net_get_link_latency_limited;
 892 #endif
 893
 894   surf_network_model->model_private->resource_used = im_net_resource_used;
 895   surf_network_model->model_private->share_resources = im_net_share_resources;
 896   surf_network_model->model_private->update_actions_state =
 897                   im_net_update_actions_state;
 898   surf_network_model->model_private->update_resource_state =
 899                   im_net_update_resource_state;
 900   surf_network_model->model_private->finalize = im_net_finalize;
 901
 902   surf_network_model->suspend = im_net_action_suspend;
 903   surf_network_model->resume = im_net_action_resume;
 904   surf_network_model->is_suspended = im_net_action_is_suspended;
 905   surf_cpu_model->set_max_duration = im_net_action_set_max_duration;
 906
 907   surf_network_model->extension.network.communicate = im_net_communicate;
 908   surf_network_model->extension.network.get_route = im_net_get_route;
 909   surf_network_model->extension.network.get_link_bandwidth =
 910                   im_net_get_link_bandwidth;
 911   surf_network_model->extension.network.get_link_latency =
 912                   im_net_get_link_latency;
 913   surf_network_model->extension.network.link_shared = im_net_link_shared;
 914   surf_network_model->extension.network.add_traces = im_net_add_traces;
 915   surf_network_model->extension.network.create_resource =
 916                   im_net_create_resource;
 917
 918
 919   if (!network_maxmin_system){
 920         sg_maxmin_selective_update = 1;
 921     network_maxmin_system = lmm_system_new();
 922   }
 923   im_net_action_heap = xbt_heap_new(8,NULL);
 924
 925   xbt_heap_set_update_callback(im_net_action_heap, im_net_action_update_index_heap);
 926
 927   routing_model_create(sizeof(link_CM02_im_t),
 928                        (void *) im_net_link_new(xbt_strdup("__loopback__"),
 929                                     498000000, NULL, 0.000015, NULL,
 930                                     SURF_RESOURCE_ON, NULL,
 931                                     SURF_LINK_FATPIPE, NULL));
 932   im_net_modified_set =
 933       xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
 934   keep_track = im_net_modified_set;
 935 }
 936
 937
 938
 939 /************************************************************************/
 940 /* New model based on optimizations discussed during this thesis        */
 941 /************************************************************************/
 942 void im_surf_network_model_init_LegrandVelho(const char *filename)
 943 {
 944
 945   if (surf_network_model)
 946     return;
 947   im_surf_network_model_init_internal();
 948   im_net_define_callbacks(filename);
 949   xbt_dynar_push(model_list, &surf_network_model);
 950   network_solve = lmm_solve;
 951
 952   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 953   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 954                             0.92);
 955   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 956
 957   update_model_description(surf_network_model_description,
 958                            "LV08_im", surf_network_model);
 959 }
 960
 961
 962