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 #include "surf/surf_resource_lmm.h"
  21
  22
  23 #undef GENERIC_ACTION
  24 #define GENERIC_ACTION(action) action->generic_action
  25
  26
  27 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_im, surf,
  28                                 "Logging specific to the SURF network module");
  29
  30
  31 enum heap_action_type{
  32   LATENCY = 100,
  33   MAX_DURATION,
  34   NORMAL,
  35   NOTSET
  36 };
  37
  38 typedef struct surf_action_network_CM02_im {
  39   s_surf_action_t generic_action;
  40   s_xbt_swag_hookup_t action_list_hookup;
  41   double latency;
  42   double lat_current;
  43   double weight;
  44   lmm_variable_t variable;
  45   double rate;
  46 #ifdef HAVE_LATENCY_BOUND_TRACKING
  47   int latency_limited;
  48 #endif
  49   int suspended;
  50 #ifdef HAVE_TRACING
  51   char *src_name;
  52   char *dst_name;
  53 #endif
  54   int index_heap;
  55   enum heap_action_type hat;
  56   double last_update;
  57 } s_surf_action_network_CM02_im_t, *surf_action_network_CM02_im_t;
  58
  59
  60 typedef struct network_link_CM02_im {
  61   s_surf_resource_lmm_t lmm_resource;   /* must remain first to be added to a trace */
  62
  63   /* Using this object with the public part of
  64      model does not make sense */
  65   double lat_current;
  66   tmgr_trace_event_t lat_event;
  67 } s_link_CM02_im_t, *link_CM02_im_t;
  68
  69
  70
  71
  72
  73
  74
  75
  76 extern surf_model_t surf_network_model;
  77 static lmm_system_t network_im_maxmin_system = NULL;
  78 static void (*network_im_solve) (lmm_system_t) = NULL;
  79
  80 extern double sg_latency_factor;
  81 extern double sg_bandwidth_factor;
  82 extern double sg_weight_S_parameter;
  83
  84 extern double sg_tcp_gamma;
  85 extern int sg_network_fullduplex;
  86
  87
  88 static void im_net_action_recycle(surf_action_t action);
  89 static int im_net_get_link_latency_limited(surf_action_t action);
  90 static int im_net_action_is_suspended(surf_action_t action);
  91 static double im_net_action_get_remains(surf_action_t action);
  92 static void im_net_action_set_max_duration(surf_action_t action, double duration);
  93 static void surf_network_model_init_CM02_im(const char *filename);
  94 static void im_net_update_actions_state(double now, double delta);
  95 static void update_action_remaining(double now);
  96
  97 static xbt_swag_t im_net_modified_set = NULL;
  98 static xbt_heap_t im_net_action_heap = NULL;
  99 xbt_swag_t keep_track = NULL;
 100 extern int sg_maxmin_selective_update;
 101
 102 /* added to manage the communication action's heap */
 103 static void im_net_action_update_index_heap(void *action, int i)
 104 {
 105   ((surf_action_network_CM02_im_t) action)->index_heap = i;
 106 }
 107
 108 /* insert action on heap using a given key and a hat (heap_action_type)
 109  * a hat can be of three types for communications:
 110  *
 111  * NORMAL = this is a normal heap entry stating the date to finish transmitting
 112  * LATENCY = this is a heap entry to warn us when the latency is payed
 113  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
 114  */
 115 static void heap_insert(surf_action_network_CM02_im_t    action, double key, enum heap_action_type hat){
 116   action->hat = hat;
 117   xbt_heap_push(im_net_action_heap, action, key);
 118 }
 119
 120 static void heap_remove(surf_action_network_CM02_im_t action){
 121   action->hat = NONE;
 122   if(((surf_action_network_CM02_im_t) action)->index_heap >= 0){
 123       xbt_heap_remove(im_net_action_heap,action->index_heap);
 124   }
 125 }
 126
 127 /******************************************************************************/
 128 /*                           Factors callbacks                                */
 129 /******************************************************************************/
 130 static double im_constant_latency_factor(double size)
 131 {
 132   return sg_latency_factor;
 133 }
 134
 135 static double im_constant_bandwidth_factor(double size)
 136 {
 137   return sg_bandwidth_factor;
 138 }
 139
 140 static double im_constant_bandwidth_constraint(double rate, double bound,
 141                                             double size)
 142 {
 143   return rate;
 144 }
 145
 146
 147 static double (*im_latency_factor_callback) (double) =
 148     &im_constant_latency_factor;
 149 static double (*im_bandwidth_factor_callback) (double) =
 150     &im_constant_bandwidth_factor;
 151 static double (*im_bandwidth_constraint_callback) (double, double, double) =
 152     &im_constant_bandwidth_constraint;
 153
 154
 155 static void* im_net_create_resource(const char *name,
 156                                 double bw_initial,
 157                                 tmgr_trace_t bw_trace,
 158                                 double lat_initial,
 159                                 tmgr_trace_t lat_trace,
 160                                 e_surf_resource_state_t
 161                                 state_initial,
 162                                 tmgr_trace_t state_trace,
 163                                 e_surf_link_sharing_policy_t
 164                                 policy, xbt_dict_t properties)
 165 {
 166   link_CM02_im_t nw_link = (link_CM02_im_t)
 167       surf_resource_lmm_new(sizeof(s_link_CM02_im_t),
 168                             surf_network_model, name, properties,
 169                             network_im_maxmin_system,
 170                             sg_bandwidth_factor * bw_initial,
 171                             history,
 172                             state_initial, state_trace,
 173                             bw_initial, bw_trace);
 174
 175   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 176               "Link '%s' declared several times in the platform file.",
 177               name);
 178
 179   nw_link->lat_current = lat_initial;
 180   if (lat_trace)
 181     nw_link->lat_event =
 182         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 183
 184   if (policy == SURF_LINK_FATPIPE)
 185     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 186
 187   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 188
 189
 190   return nw_link;
 191 }
 192
 193 static void im_net_parse_link_init(sg_platf_link_cbarg_t link)
 194 {
 195   if(link->policy == SURF_LINK_FULLDUPLEX)
 196   {
 197           im_net_create_resource(bprintf("%s_UP",link->id), link->bandwidth, link->bandwidth_trace,
 198                        link->latency, link->latency_trace, link->state, link->state_trace,
 199                        link->policy, link->properties);
 200           im_net_create_resource(bprintf("%s_DOWN",link->id), link->bandwidth, link->bandwidth_trace,
 201             link->latency, link->latency_trace, link->state, link->state_trace,
 202             link->policy, NULL); // FIXME: We need to deep copy the properties or we won't be able to free it
 203   }
 204   else
 205   {
 206           im_net_create_resource(xbt_strdup(link->id), link->bandwidth, link->bandwidth_trace,
 207                 link->latency, link->latency_trace, link->state, link->state_trace,
 208                        link->policy, link->properties);
 209   }
 210 }
 211
 212 static void im_net_add_traces(void)
 213 {
 214   xbt_dict_cursor_t cursor = NULL;
 215   char *trace_name, *elm;
 216
 217   static int called = 0;
 218   if (called)
 219     return;
 220   called = 1;
 221
 222   /* connect all traces relative to network */
 223   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 224     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 225     link_CM02_im_t link =
 226                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 227
 228     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 229                 trace_name, elm);
 230     xbt_assert(trace,
 231                 "Cannot connect trace %s to link %s: trace undefined",
 232                 trace_name, elm);
 233
 234     link->lmm_resource.state_event =
 235         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 236   }
 237
 238   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 239     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 240     link_CM02_im_t link =
 241                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 242
 243     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 244                 trace_name, elm);
 245     xbt_assert(trace,
 246                 "Cannot connect trace %s to link %s: trace undefined",
 247                 trace_name, elm);
 248
 249     link->lmm_resource.power.event =
 250         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 251   }
 252
 253   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 254     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 255     link_CM02_im_t link =
 256                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 257
 258     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 259                 trace_name, elm);
 260     xbt_assert(trace,
 261                 "Cannot connect trace %s to link %s: trace undefined",
 262                 trace_name, elm);
 263
 264     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 265   }
 266 }
 267
 268 static void im_net_define_callbacks(void)
 269 {
 270   /* Figuring out the network links */
 271   sg_platf_link_add_cb(im_net_parse_link_init);
 272   sg_platf_postparse_add_cb(im_net_add_traces);
 273 }
 274
 275 static int im_net_resource_used(void *resource_id)
 276 {
 277   return lmm_constraint_used(network_im_maxmin_system,
 278                              ((surf_resource_lmm_t)
 279                               resource_id)->constraint);
 280 }
 281
 282 static int im_net_action_unref(surf_action_t action)
 283 {
 284   action->refcount--;
 285   if (!action->refcount) {
 286     xbt_swag_remove(action, action->state_set);
 287     if (((surf_action_network_CM02_im_t) action)->variable){
 288       lmm_variable_free(network_im_maxmin_system,
 289                         ((surf_action_network_CM02_im_t) action)->variable);
 290     }
 291     // remove action from the heap
 292     heap_remove((surf_action_network_CM02_im_t) action);
 293
 294     xbt_swag_remove(action, im_net_modified_set);
 295 #ifdef HAVE_TRACING
 296     xbt_free(((surf_action_network_CM02_im_t) action)->src_name);
 297     xbt_free(((surf_action_network_CM02_im_t) action)->dst_name);
 298     if (action->category)
 299       xbt_free(action->category);
 300 #endif
 301     surf_action_free(&action);
 302     return 1;
 303   }
 304   return 0;
 305 }
 306
 307
 308
 309 static void im_net_action_cancel(surf_action_t action)
 310 {
 311   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 312
 313   xbt_swag_remove(action, im_net_modified_set);
 314   // remove action from the heap
 315   heap_remove((surf_action_network_CM02_im_t) action);
 316 }
 317
 318 void im_net_action_recycle(surf_action_t action)
 319 {
 320   return;
 321 }
 322
 323 #ifdef HAVE_LATENCY_BOUND_TRACKING
 324 int im_net_get_link_latency_limited(surf_action_t action)
 325 {
 326   return action->latency_limited;
 327 }
 328 #endif
 329
 330 double im_net_action_get_remains(surf_action_t action)
 331 {
 332   /* update remains before return it */
 333   update_action_remaining(surf_get_clock());
 334   return action->remains;
 335 }
 336
 337 static void update_action_remaining(double now){
 338   surf_action_network_CM02_im_t action = NULL;
 339   double delta = 0.0;
 340
 341   xbt_swag_foreach(action, im_net_modified_set) {
 342
 343     if(action->suspended != 0){
 344         continue;
 345     }
 346
 347     delta = now - action->last_update;
 348
 349     double_update(&(action->generic_action.remains),
 350                   lmm_variable_getvalue(action->variable) * delta);
 351
 352     if (action->generic_action.max_duration != NO_MAX_DURATION)
 353       double_update(&(action->generic_action.max_duration), delta);
 354
 355     if ((action->generic_action.remains <= 0) &&
 356         (lmm_get_variable_weight(action->variable) > 0)) {
 357       action->generic_action.finish = surf_get_clock();
 358       surf_network_model->action_state_set((surf_action_t) action,
 359                                            SURF_ACTION_DONE);
 360       heap_remove(action);
 361     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 362                && (action->generic_action.max_duration <= 0)) {
 363       action->generic_action.finish = surf_get_clock();
 364       surf_network_model->action_state_set((surf_action_t) action,
 365                                            SURF_ACTION_DONE);
 366       heap_remove(action);
 367     }
 368
 369     action->last_update = now;
 370   }
 371 }
 372
 373 static double im_net_share_resources(double now)
 374 {
 375   surf_action_network_CM02_im_t action = NULL;
 376   double min=-1;
 377   double value;
 378
 379   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 380   update_action_remaining(now);
 381
 382   keep_track = im_net_modified_set;
 383   lmm_solve(network_im_maxmin_system);
 384   keep_track = NULL;
 385
 386   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 387
 388    xbt_swag_foreach(action, im_net_modified_set) {
 389      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 390        continue;
 391      }
 392
 393      /* bogus priority, skip it */
 394      if (GENERIC_ACTION(action).priority <= 0){
 395          continue;
 396      }
 397
 398      min = -1;
 399      value = lmm_variable_getvalue(action->variable);
 400      if (value > 0) {
 401          if (GENERIC_ACTION(action).remains > 0) {
 402              value = GENERIC_ACTION(action).remains / value;
 403              min = now + value;
 404          } else {
 405              value = 0.0;
 406              min = now;
 407          }
 408      }
 409
 410      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 411          && (min == -1
 412              || GENERIC_ACTION(action).start +
 413              GENERIC_ACTION(action).max_duration < min)){
 414        min =   GENERIC_ACTION(action).start +
 415                GENERIC_ACTION(action).max_duration;
 416      }
 417
 418      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 419                 GENERIC_ACTION(action).start, now + value,
 420                 GENERIC_ACTION(action).max_duration);
 421
 422
 423
 424      if (action->index_heap >= 0) {
 425          heap_remove((surf_action_network_CM02_im_t) action);
 426      }
 427
 428      if (min != -1) {
 429          heap_insert((surf_action_network_CM02_im_t) action, min, NORMAL);
 430          XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 431      }
 432    }
 433
 434    //hereafter must have already the min value for this resource model
 435    if(xbt_heap_size(im_net_action_heap) > 0 ){
 436        min = xbt_heap_maxkey(im_net_action_heap) - now ;
 437    }else{
 438        min = -1;
 439    }
 440
 441    XBT_DEBUG("The minimum with the HEAP %lf", min);
 442
 443
 444   return min;
 445 }
 446
 447 static void im_net_update_actions_state(double now, double delta)
 448 {
 449   surf_action_network_CM02_im_t action = NULL;
 450
 451   while ((xbt_heap_size(im_net_action_heap) > 0)
 452          && (double_equals(xbt_heap_maxkey(im_net_action_heap), now))) {
 453     action = xbt_heap_pop(im_net_action_heap);
 454     XBT_DEBUG("Action %p: finish", action);
 455     GENERIC_ACTION(action).finish = surf_get_clock();
 456
 457     // if I am wearing a latency heat
 458     if( action->hat ==  LATENCY){
 459         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 460                                            action->weight);
 461         heap_remove(action);
 462         action->last_update = surf_get_clock();
 463
 464         XBT_DEBUG("Action (%p) is not limited by latency anymore", action);
 465 #ifdef HAVE_LATENCY_BOUND_TRACKING
 466           GENERIC_ACTION(action).latency_limited = 0;
 467 #endif
 468
 469     // if I am wearing a max_duration or normal hat
 470     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 471         // no need to communicate anymore
 472         // assume that flows that reached max_duration have remaining of 0
 473         GENERIC_ACTION(action).remains = 0;
 474         action->generic_action.finish = surf_get_clock();
 475               surf_network_model->action_state_set((surf_action_t) action,
 476                                                    SURF_ACTION_DONE);
 477         heap_remove(action);
 478     }
 479   }
 480   return;
 481 }
 482
 483 static void im_net_update_resource_state(void *id,
 484                                       tmgr_trace_event_t event_type,
 485                                       double value, double date)
 486 {
 487   link_CM02_im_t nw_link = id;
 488   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 489   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 490   /*     value, event_type); */
 491
 492   if (event_type == nw_link->lmm_resource.power.event) {
 493     double delta =
 494         sg_weight_S_parameter / value - sg_weight_S_parameter /
 495         (nw_link->lmm_resource.power.peak *
 496          nw_link->lmm_resource.power.scale);
 497     lmm_variable_t var = NULL;
 498     lmm_element_t elem = NULL;
 499     surf_action_network_CM02_im_t action = NULL;
 500
 501     nw_link->lmm_resource.power.peak = value;
 502     lmm_update_constraint_bound(network_im_maxmin_system,
 503                                 nw_link->lmm_resource.constraint,
 504                                 sg_bandwidth_factor *
 505                                 (nw_link->lmm_resource.power.peak *
 506                                  nw_link->lmm_resource.power.scale));
 507 #ifdef HAVE_TRACING
 508     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 509                                   sg_bandwidth_factor *
 510                                   (nw_link->lmm_resource.power.peak *
 511                                    nw_link->lmm_resource.power.scale));
 512 #endif
 513     if (sg_weight_S_parameter > 0) {
 514       while ((var = lmm_get_var_from_cnst
 515               (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 516                &elem))) {
 517         action = lmm_variable_id(var);
 518         action->weight += delta;
 519         if (!(action->suspended))
 520           lmm_update_variable_weight(network_im_maxmin_system,
 521                                      action->variable, action->weight);
 522       }
 523     }
 524     if (tmgr_trace_event_free(event_type))
 525       nw_link->lmm_resource.power.event = NULL;
 526   } else if (event_type == nw_link->lat_event) {
 527     double delta = value - nw_link->lat_current;
 528     lmm_variable_t var = NULL;
 529     lmm_element_t elem = NULL;
 530     surf_action_network_CM02_im_t action = NULL;
 531
 532     nw_link->lat_current = value;
 533     while ((var = lmm_get_var_from_cnst
 534             (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 535              &elem))) {
 536       action = lmm_variable_id(var);
 537       action->lat_current += delta;
 538       action->weight += delta;
 539       if (action->rate < 0)
 540         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 541                                   sg_tcp_gamma / (2.0 *
 542                                                   action->lat_current));
 543       else {
 544         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 545                                   min(action->rate,
 546                                       sg_tcp_gamma / (2.0 *
 547                                                       action->lat_current)));
 548
 549         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 550           XBT_INFO("Flow is limited BYBANDWIDTH");
 551         } else {
 552           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 553                 action->lat_current);
 554         }
 555       }
 556       if (!(action->suspended))
 557         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 558                                    action->weight);
 559
 560     }
 561     if (tmgr_trace_event_free(event_type))
 562       nw_link->lat_event = NULL;
 563   } else if (event_type == nw_link->lmm_resource.state_event) {
 564     if (value > 0)
 565       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 566     else {
 567       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 568       lmm_variable_t var = NULL;
 569       lmm_element_t elem = NULL;
 570
 571       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 572       while ((var = lmm_get_var_from_cnst
 573               (network_im_maxmin_system, cnst, &elem))) {
 574         surf_action_t action = lmm_variable_id(var);
 575
 576         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 577             surf_action_state_get(action) == SURF_ACTION_READY) {
 578           action->finish = date;
 579           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 580         }
 581       }
 582     }
 583     if (tmgr_trace_event_free(event_type))
 584       nw_link->lmm_resource.state_event = NULL;
 585   } else {
 586     XBT_CRITICAL("Unknown event ! \n");
 587     xbt_abort();
 588   }
 589
 590   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 591   return;
 592 }
 593
 594
 595 static surf_action_t im_net_communicate(const char *src_name,
 596                                      const char *dst_name, double size,
 597                                      double rate)
 598 {
 599   unsigned int i;
 600   link_CM02_im_t link;
 601   int failed = 0;
 602   surf_action_network_CM02_im_t action = NULL;
 603   double bandwidth_bound;
 604   /* LARGE PLATFORMS HACK:
 605      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
 606      Use the cluster_id for ->id */
 607
 608   xbt_dynar_t back_route = NULL;
 609   int constraints_per_variable = 0;
 610   // I will need this route for some time so let's call get_route_no_cleanup
 611   xbt_dynar_t route = global_routing->get_route_no_cleanup(src_name, dst_name);
 612
 613
 614   if (sg_network_fullduplex == 1) {
 615     back_route = global_routing->get_route(dst_name, src_name);
 616   }
 617
 618   /* LARGE PLATFORMS HACK:
 619      total_route_size = route_size + src->link_nb + dst->nb */
 620
 621   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 622   /* LARGE PLATFORMS HACK:
 623      assert on total_route_size */
 624   xbt_assert(xbt_dynar_length(route),
 625               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 626               src_name, dst_name);
 627
 628   xbt_dynar_foreach(route, i, link) {
 629     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 630       failed = 1;
 631       break;
 632     }
 633   }
 634   action =
 635       surf_action_new(sizeof(s_surf_action_network_CM02_im_t), size,
 636                       surf_network_model, failed);
 637
 638
 639 #ifdef HAVE_LATENCY_BOUND_TRACKING
 640   (action->generic_action).latency_limited = 0;
 641 #endif
 642
 643   xbt_swag_insert(action, action->generic_action.state_set);
 644   action->rate = rate;
 645   action->index_heap = -1;
 646   action->latency = 0.0;
 647   action->weight = 0.0;
 648   action->last_update = surf_get_clock();
 649
 650   bandwidth_bound = -1.0;
 651   xbt_dynar_foreach(route, i, link) {
 652     action->latency += link->lat_current;
 653     action->weight +=
 654         link->lat_current +
 655         sg_weight_S_parameter /
 656         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 657     if (bandwidth_bound < 0.0)
 658       bandwidth_bound =
 659           (*im_bandwidth_factor_callback) (size) *
 660           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 661     else
 662       bandwidth_bound =
 663           min(bandwidth_bound,
 664               (*im_bandwidth_factor_callback) (size) *
 665               (link->lmm_resource.power.peak *
 666                link->lmm_resource.power.scale));
 667   }
 668   /* LARGE PLATFORMS HACK:
 669      Add src->link and dst->link latencies */
 670   action->lat_current = action->latency;
 671   action->latency *= (*im_latency_factor_callback) (size);
 672   action->rate =
 673       (*im_bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 674                                         size);
 675
 676   /* LARGE PLATFORMS HACK:
 677      lmm_variable_new(..., total_route_size) */
 678   if (back_route != NULL) {
 679     constraints_per_variable =
 680         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 681   } else {
 682     constraints_per_variable = xbt_dynar_length(route);
 683   }
 684
 685   if (action->latency > 0){
 686       action->variable =
 687         lmm_variable_new(network_im_maxmin_system, action, 0.0, -1.0,
 688                          constraints_per_variable);
 689     // add to the heap the event when the latency is payed
 690     XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 691     heap_insert(action, action->latency + action->last_update, LATENCY);
 692 #ifdef HAVE_LATENCY_BOUND_TRACKING
 693         (action->generic_action).latency_limited = 1;
 694 #endif
 695   }
 696   else
 697     action->variable =
 698         lmm_variable_new(network_im_maxmin_system, action, 1.0, -1.0,
 699                          constraints_per_variable);
 700
 701   if (action->rate < 0) {
 702     if (action->lat_current > 0)
 703       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 704                                 sg_tcp_gamma / (2.0 *
 705                                                 action->lat_current));
 706     else
 707       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 708                                 -1.0);
 709   } else {
 710     if (action->lat_current > 0)
 711       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 712                                 min(action->rate,
 713                                     sg_tcp_gamma / (2.0 *
 714                                                     action->lat_current)));
 715     else
 716       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 717                                 action->rate);
 718   }
 719
 720   xbt_dynar_foreach(route, i, link) {
 721     lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 722                action->variable, 1.0);
 723   }
 724
 725   if (sg_network_fullduplex == 1) {
 726     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 727     xbt_dynar_foreach(back_route, i, link) {
 728       lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 729                  action->variable, .05);
 730     }
 731   }
 732
 733   /* LARGE PLATFORMS HACK:
 734      expand also with src->link and dst->link */
 735 #ifdef HAVE_TRACING
 736   if (TRACE_is_enabled()) {
 737     action->src_name = xbt_strdup(src_name);
 738     action->dst_name = xbt_strdup(dst_name);
 739   } else {
 740     action->src_name = action->dst_name = NULL;
 741   }
 742 #endif
 743
 744   xbt_dynar_free(&route);
 745   XBT_OUT();
 746
 747   return (surf_action_t) action;
 748 }
 749
 750 static xbt_dynar_t im_net_get_route(const char *src, const char *dst)
 751 {
 752   return global_routing->get_route(src, dst);
 753 }
 754
 755 static double im_net_get_link_bandwidth(const void *link)
 756 {
 757   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 758   return lmm->power.peak * lmm->power.scale;
 759 }
 760
 761 static double im_net_get_link_latency(const void *link)
 762 {
 763   return ((link_CM02_im_t) link)->lat_current;
 764 }
 765
 766 static int im_net_link_shared(const void *link)
 767 {
 768   return
 769       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 770 }
 771
 772 static void im_net_action_suspend(surf_action_t action)
 773 {
 774   ((surf_action_network_CM02_im_t) action)->suspended = 1;
 775   lmm_update_variable_weight(network_im_maxmin_system,
 776                              ((surf_action_network_CM02_im_t)
 777                               action)->variable, 0.0);
 778
 779   // remove action from the heap
 780   heap_remove((surf_action_network_CM02_im_t) action);
 781 }
 782
 783 static void im_net_action_resume(surf_action_t action)
 784 {
 785   if (((surf_action_network_CM02_im_t) action)->suspended) {
 786     lmm_update_variable_weight(network_im_maxmin_system,
 787                                ((surf_action_network_CM02_im_t)
 788                                 action)->variable,
 789                                ((surf_action_network_CM02_im_t)
 790                                 action)->weight);
 791     ((surf_action_network_CM02_im_t) action)->suspended = 0;
 792     // remove action from the heap
 793     heap_remove((surf_action_network_CM02_im_t) action);
 794   }
 795 }
 796
 797 static int im_net_action_is_suspended(surf_action_t action)
 798 {
 799   return ((surf_action_network_CM02_im_t) action)->suspended;
 800 }
 801
 802 void im_net_action_set_max_duration(surf_action_t action, double duration)
 803 {
 804   action->max_duration = duration;
 805   // remove action from the heap
 806   heap_remove((surf_action_network_CM02_im_t) action);
 807 }
 808
 809
 810 static void im_net_finalize(void)
 811 {
 812   surf_model_exit(surf_network_model);
 813   surf_network_model = NULL;
 814
 815   global_routing->finalize();
 816
 817   lmm_system_free(network_im_maxmin_system);
 818   network_im_maxmin_system = NULL;
 819
 820   xbt_heap_free(im_net_action_heap);
 821   xbt_swag_free(im_net_modified_set);
 822
 823 }
 824
 825 static void im_surf_network_model_init_internal(void)
 826 {
 827   s_surf_action_network_CM02_im_t comm;
 828
 829   surf_network_model = surf_model_init();
 830
 831   surf_network_model->name = "network";
 832   surf_network_model->action_unref = im_net_action_unref;
 833   surf_network_model->action_cancel = im_net_action_cancel;
 834   surf_network_model->action_recycle = im_net_action_recycle;
 835   surf_network_model->get_remains = im_net_action_get_remains;
 836 #ifdef HAVE_LATENCY_BOUND_TRACKING
 837   surf_network_model->get_latency_limited = im_net_get_link_latency_limited;
 838 #endif
 839
 840   surf_network_model->model_private->resource_used = im_net_resource_used;
 841   surf_network_model->model_private->share_resources = im_net_share_resources;
 842   surf_network_model->model_private->update_actions_state =
 843                   im_net_update_actions_state;
 844   surf_network_model->model_private->update_resource_state =
 845                   im_net_update_resource_state;
 846   surf_network_model->model_private->finalize = im_net_finalize;
 847
 848   surf_network_model->suspend = im_net_action_suspend;
 849   surf_network_model->resume = im_net_action_resume;
 850   surf_network_model->is_suspended = im_net_action_is_suspended;
 851   surf_cpu_model->set_max_duration = im_net_action_set_max_duration;
 852
 853   surf_network_model->extension.network.communicate = im_net_communicate;
 854   surf_network_model->extension.network.get_route = im_net_get_route;
 855   surf_network_model->extension.network.get_link_bandwidth =
 856                   im_net_get_link_bandwidth;
 857   surf_network_model->extension.network.get_link_latency =
 858                   im_net_get_link_latency;
 859   surf_network_model->extension.network.link_shared = im_net_link_shared;
 860   surf_network_model->extension.network.add_traces = im_net_add_traces;
 861   surf_network_model->extension.network.create_resource =
 862                   im_net_create_resource;
 863
 864
 865   if (!network_im_maxmin_system){
 866         sg_maxmin_selective_update = 1;
 867     network_im_maxmin_system = lmm_system_new();
 868   }
 869   im_net_action_heap = xbt_heap_new(8,NULL);
 870
 871   xbt_heap_set_update_callback(im_net_action_heap, im_net_action_update_index_heap);
 872
 873   routing_model_create(sizeof(link_CM02_im_t),
 874       im_net_create_resource(xbt_strdup("__loopback__"),
 875           498000000, NULL, 0.000015, NULL,
 876           SURF_RESOURCE_ON, NULL,
 877           SURF_LINK_FATPIPE, NULL),
 878           im_net_get_link_latency);
 879   im_net_modified_set =
 880       xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
 881 }
 882
 883
 884
 885 /************************************************************************/
 886 /* New model based on optimizations discussed during this thesis        */
 887 /************************************************************************/
 888 void im_surf_network_model_init_LegrandVelho(void)
 889 {
 890
 891   if (surf_network_model)
 892     return;
 893   im_surf_network_model_init_internal();
 894   im_net_define_callbacks();
 895   xbt_dynar_push(model_list, &surf_network_model);
 896   network_im_solve = lmm_solve;
 897
 898   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 899   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 900                             0.92);
 901   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 902
 903   update_model_description(surf_network_model_description,
 904                            "LV08", surf_network_model);
 905 }
 906
 907
 908