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     xbt_free(action->category);
 299 #endif
 300     surf_action_free(&action);
 301     return 1;
 302   }
 303   return 0;
 304 }
 305
 306
 307
 308 static void im_net_action_cancel(surf_action_t action)
 309 {
 310   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 311
 312   xbt_swag_remove(action, im_net_modified_set);
 313   // remove action from the heap
 314   heap_remove((surf_action_network_CM02_im_t) action);
 315 }
 316
 317 void im_net_action_recycle(surf_action_t action)
 318 {
 319   return;
 320 }
 321
 322 #ifdef HAVE_LATENCY_BOUND_TRACKING
 323 int im_net_get_link_latency_limited(surf_action_t action)
 324 {
 325   return action->latency_limited;
 326 }
 327 #endif
 328
 329 double im_net_action_get_remains(surf_action_t action)
 330 {
 331   /* update remains before return it */
 332   update_action_remaining(surf_get_clock());
 333   return action->remains;
 334 }
 335
 336 static void update_action_remaining(double now){
 337   surf_action_network_CM02_im_t action = NULL;
 338   double delta = 0.0;
 339
 340   xbt_swag_foreach(action, im_net_modified_set) {
 341
 342     if(action->suspended != 0){
 343         continue;
 344     }
 345
 346     delta = now - action->last_update;
 347
 348     double_update(&(action->generic_action.remains),
 349                   lmm_variable_getvalue(action->variable) * delta);
 350
 351     if (action->generic_action.max_duration != NO_MAX_DURATION)
 352       double_update(&(action->generic_action.max_duration), delta);
 353
 354     if ((action->generic_action.remains <= 0) &&
 355         (lmm_get_variable_weight(action->variable) > 0)) {
 356       action->generic_action.finish = surf_get_clock();
 357       surf_network_model->action_state_set((surf_action_t) action,
 358                                            SURF_ACTION_DONE);
 359       heap_remove(action);
 360     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 361                && (action->generic_action.max_duration <= 0)) {
 362       action->generic_action.finish = surf_get_clock();
 363       surf_network_model->action_state_set((surf_action_t) action,
 364                                            SURF_ACTION_DONE);
 365       heap_remove(action);
 366     }
 367
 368     action->last_update = now;
 369   }
 370 }
 371
 372 static double im_net_share_resources(double now)
 373 {
 374   surf_action_network_CM02_im_t action = NULL;
 375   double min=-1;
 376   double value;
 377
 378   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 379   update_action_remaining(now);
 380
 381   keep_track = im_net_modified_set;
 382   lmm_solve(network_im_maxmin_system);
 383   keep_track = NULL;
 384
 385   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 386
 387    xbt_swag_foreach(action, im_net_modified_set) {
 388      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 389        continue;
 390      }
 391
 392      /* bogus priority, skip it */
 393      if (GENERIC_ACTION(action).priority <= 0){
 394          continue;
 395      }
 396
 397      min = -1;
 398      value = lmm_variable_getvalue(action->variable);
 399      if (value > 0) {
 400          if (GENERIC_ACTION(action).remains > 0) {
 401              value = GENERIC_ACTION(action).remains / value;
 402              min = now + value;
 403          } else {
 404              value = 0.0;
 405              min = now;
 406          }
 407      }
 408
 409      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 410          && (min == -1
 411              || GENERIC_ACTION(action).start +
 412              GENERIC_ACTION(action).max_duration < min)){
 413        min =   GENERIC_ACTION(action).start +
 414                GENERIC_ACTION(action).max_duration;
 415      }
 416
 417      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 418                 GENERIC_ACTION(action).start, now + value,
 419                 GENERIC_ACTION(action).max_duration);
 420
 421
 422
 423      if (action->index_heap >= 0) {
 424          heap_remove((surf_action_network_CM02_im_t) action);
 425      }
 426
 427      if (min != -1) {
 428          heap_insert((surf_action_network_CM02_im_t) action, min, NORMAL);
 429          XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 430      }
 431    }
 432
 433    //hereafter must have already the min value for this resource model
 434    if(xbt_heap_size(im_net_action_heap) > 0 ){
 435        min = xbt_heap_maxkey(im_net_action_heap) - now ;
 436    }else{
 437        min = -1;
 438    }
 439
 440    XBT_DEBUG("The minimum with the HEAP %lf", min);
 441
 442
 443   return min;
 444 }
 445
 446 static void im_net_update_actions_state(double now, double delta)
 447 {
 448   surf_action_network_CM02_im_t action = NULL;
 449
 450   while ((xbt_heap_size(im_net_action_heap) > 0)
 451          && (double_equals(xbt_heap_maxkey(im_net_action_heap), now))) {
 452     action = xbt_heap_pop(im_net_action_heap);
 453     XBT_DEBUG("Action %p: finish", action);
 454     GENERIC_ACTION(action).finish = surf_get_clock();
 455
 456     // if I am wearing a latency heat
 457     if( action->hat ==  LATENCY){
 458         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 459                                            action->weight);
 460         heap_remove(action);
 461         action->last_update = surf_get_clock();
 462
 463         XBT_DEBUG("Action (%p) is not limited by latency anymore", action);
 464 #ifdef HAVE_LATENCY_BOUND_TRACKING
 465           GENERIC_ACTION(action).latency_limited = 0;
 466 #endif
 467
 468     // if I am wearing a max_duration or normal hat
 469     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 470         // no need to communicate anymore
 471         // assume that flows that reached max_duration have remaining of 0
 472         GENERIC_ACTION(action).remains = 0;
 473         action->generic_action.finish = surf_get_clock();
 474               surf_network_model->action_state_set((surf_action_t) action,
 475                                                    SURF_ACTION_DONE);
 476         heap_remove(action);
 477     }
 478   }
 479   return;
 480 }
 481
 482 static void im_net_update_resource_state(void *id,
 483                                       tmgr_trace_event_t event_type,
 484                                       double value, double date)
 485 {
 486   link_CM02_im_t nw_link = id;
 487   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 488   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 489   /*     value, event_type); */
 490
 491   if (event_type == nw_link->lmm_resource.power.event) {
 492     double delta =
 493         sg_weight_S_parameter / value - sg_weight_S_parameter /
 494         (nw_link->lmm_resource.power.peak *
 495          nw_link->lmm_resource.power.scale);
 496     lmm_variable_t var = NULL;
 497     lmm_element_t elem = NULL;
 498     surf_action_network_CM02_im_t action = NULL;
 499
 500     nw_link->lmm_resource.power.peak = value;
 501     lmm_update_constraint_bound(network_im_maxmin_system,
 502                                 nw_link->lmm_resource.constraint,
 503                                 sg_bandwidth_factor *
 504                                 (nw_link->lmm_resource.power.peak *
 505                                  nw_link->lmm_resource.power.scale));
 506 #ifdef HAVE_TRACING
 507     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 508                                   sg_bandwidth_factor *
 509                                   (nw_link->lmm_resource.power.peak *
 510                                    nw_link->lmm_resource.power.scale));
 511 #endif
 512     if (sg_weight_S_parameter > 0) {
 513       while ((var = lmm_get_var_from_cnst
 514               (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 515                &elem))) {
 516         action = lmm_variable_id(var);
 517         action->weight += delta;
 518         if (!(action->suspended))
 519           lmm_update_variable_weight(network_im_maxmin_system,
 520                                      action->variable, action->weight);
 521       }
 522     }
 523     if (tmgr_trace_event_free(event_type))
 524       nw_link->lmm_resource.power.event = NULL;
 525   } else if (event_type == nw_link->lat_event) {
 526     double delta = value - nw_link->lat_current;
 527     lmm_variable_t var = NULL;
 528     lmm_element_t elem = NULL;
 529     surf_action_network_CM02_im_t action = NULL;
 530
 531     nw_link->lat_current = value;
 532     while ((var = lmm_get_var_from_cnst
 533             (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 534              &elem))) {
 535       action = lmm_variable_id(var);
 536       action->lat_current += delta;
 537       action->weight += delta;
 538       if (action->rate < 0)
 539         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 540                                   sg_tcp_gamma / (2.0 *
 541                                                   action->lat_current));
 542       else {
 543         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 544                                   min(action->rate,
 545                                       sg_tcp_gamma / (2.0 *
 546                                                       action->lat_current)));
 547
 548         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 549           XBT_INFO("Flow is limited BYBANDWIDTH");
 550         } else {
 551           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 552                 action->lat_current);
 553         }
 554       }
 555       if (!(action->suspended))
 556         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 557                                    action->weight);
 558
 559     }
 560     if (tmgr_trace_event_free(event_type))
 561       nw_link->lat_event = NULL;
 562   } else if (event_type == nw_link->lmm_resource.state_event) {
 563     if (value > 0)
 564       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 565     else {
 566       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 567       lmm_variable_t var = NULL;
 568       lmm_element_t elem = NULL;
 569
 570       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 571       while ((var = lmm_get_var_from_cnst
 572               (network_im_maxmin_system, cnst, &elem))) {
 573         surf_action_t action = lmm_variable_id(var);
 574
 575         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 576             surf_action_state_get(action) == SURF_ACTION_READY) {
 577           action->finish = date;
 578           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 579         }
 580       }
 581     }
 582     if (tmgr_trace_event_free(event_type))
 583       nw_link->lmm_resource.state_event = NULL;
 584   } else {
 585     XBT_CRITICAL("Unknown event ! \n");
 586     xbt_abort();
 587   }
 588
 589   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 590   return;
 591 }
 592
 593
 594 static surf_action_t im_net_communicate(const char *src_name,
 595                                      const char *dst_name, double size,
 596                                      double rate)
 597 {
 598   unsigned int i;
 599   link_CM02_im_t link;
 600   int failed = 0;
 601   surf_action_network_CM02_im_t action = NULL;
 602   double bandwidth_bound;
 603   /* LARGE PLATFORMS HACK:
 604      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
 605      Use the cluster_id for ->id */
 606
 607   xbt_dynar_t back_route = NULL;
 608   int constraints_per_variable = 0;
 609   // I will need this route for some time so let's call get_route_no_cleanup
 610   xbt_dynar_t route = global_routing->get_route_no_cleanup(src_name, dst_name);
 611
 612
 613   if (sg_network_fullduplex == 1) {
 614     back_route = global_routing->get_route(dst_name, src_name);
 615   }
 616
 617   /* LARGE PLATFORMS HACK:
 618      total_route_size = route_size + src->link_nb + dst->nb */
 619
 620   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 621   /* LARGE PLATFORMS HACK:
 622      assert on total_route_size */
 623   xbt_assert(xbt_dynar_length(route),
 624               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 625               src_name, dst_name);
 626
 627   xbt_dynar_foreach(route, i, link) {
 628     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 629       failed = 1;
 630       break;
 631     }
 632   }
 633   action =
 634       surf_action_new(sizeof(s_surf_action_network_CM02_im_t), size,
 635                       surf_network_model, failed);
 636
 637
 638 #ifdef HAVE_LATENCY_BOUND_TRACKING
 639   (action->generic_action).latency_limited = 0;
 640 #endif
 641
 642   xbt_swag_insert(action, action->generic_action.state_set);
 643   action->rate = rate;
 644   action->index_heap = -1;
 645   action->latency = 0.0;
 646   action->weight = 0.0;
 647   action->last_update = surf_get_clock();
 648
 649   bandwidth_bound = -1.0;
 650   xbt_dynar_foreach(route, i, link) {
 651     action->latency += link->lat_current;
 652     action->weight +=
 653         link->lat_current +
 654         sg_weight_S_parameter /
 655         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 656     if (bandwidth_bound < 0.0)
 657       bandwidth_bound =
 658           (*im_bandwidth_factor_callback) (size) *
 659           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 660     else
 661       bandwidth_bound =
 662           min(bandwidth_bound,
 663               (*im_bandwidth_factor_callback) (size) *
 664               (link->lmm_resource.power.peak *
 665                link->lmm_resource.power.scale));
 666   }
 667   /* LARGE PLATFORMS HACK:
 668      Add src->link and dst->link latencies */
 669   action->lat_current = action->latency;
 670   action->latency *= (*im_latency_factor_callback) (size);
 671   action->rate =
 672       (*im_bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 673                                         size);
 674
 675   /* LARGE PLATFORMS HACK:
 676      lmm_variable_new(..., total_route_size) */
 677   if (back_route != NULL) {
 678     constraints_per_variable =
 679         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 680   } else {
 681     constraints_per_variable = xbt_dynar_length(route);
 682   }
 683
 684   if (action->latency > 0){
 685       action->variable =
 686         lmm_variable_new(network_im_maxmin_system, action, 0.0, -1.0,
 687                          constraints_per_variable);
 688     // add to the heap the event when the latency is payed
 689     XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 690     heap_insert(action, action->latency + action->last_update, LATENCY);
 691 #ifdef HAVE_LATENCY_BOUND_TRACKING
 692         (action->generic_action).latency_limited = 1;
 693 #endif
 694   }
 695   else
 696     action->variable =
 697         lmm_variable_new(network_im_maxmin_system, action, 1.0, -1.0,
 698                          constraints_per_variable);
 699
 700   if (action->rate < 0) {
 701     if (action->lat_current > 0)
 702       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 703                                 sg_tcp_gamma / (2.0 *
 704                                                 action->lat_current));
 705     else
 706       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 707                                 -1.0);
 708   } else {
 709     if (action->lat_current > 0)
 710       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 711                                 min(action->rate,
 712                                     sg_tcp_gamma / (2.0 *
 713                                                     action->lat_current)));
 714     else
 715       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 716                                 action->rate);
 717   }
 718
 719   xbt_dynar_foreach(route, i, link) {
 720     lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 721                action->variable, 1.0);
 722   }
 723
 724   if (sg_network_fullduplex == 1) {
 725     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 726     xbt_dynar_foreach(back_route, i, link) {
 727       lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 728                  action->variable, .05);
 729     }
 730   }
 731
 732   /* LARGE PLATFORMS HACK:
 733      expand also with src->link and dst->link */
 734 #ifdef HAVE_TRACING
 735   if (TRACE_is_enabled()) {
 736     action->src_name = xbt_strdup(src_name);
 737     action->dst_name = xbt_strdup(dst_name);
 738   } else {
 739     action->src_name = action->dst_name = NULL;
 740   }
 741 #endif
 742
 743   xbt_dynar_free(&route);
 744   XBT_OUT();
 745
 746   return (surf_action_t) action;
 747 }
 748
 749 static xbt_dynar_t im_net_get_route(const char *src, const char *dst)
 750 {
 751   return global_routing->get_route(src, dst);
 752 }
 753
 754 static double im_net_get_link_bandwidth(const void *link)
 755 {
 756   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 757   return lmm->power.peak * lmm->power.scale;
 758 }
 759
 760 static double im_net_get_link_latency(const void *link)
 761 {
 762   return ((link_CM02_im_t) link)->lat_current;
 763 }
 764
 765 static int im_net_link_shared(const void *link)
 766 {
 767   return
 768       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 769 }
 770
 771 static void im_net_action_suspend(surf_action_t action)
 772 {
 773   ((surf_action_network_CM02_im_t) action)->suspended = 1;
 774   lmm_update_variable_weight(network_im_maxmin_system,
 775                              ((surf_action_network_CM02_im_t)
 776                               action)->variable, 0.0);
 777
 778   // remove action from the heap
 779   heap_remove((surf_action_network_CM02_im_t) action);
 780 }
 781
 782 static void im_net_action_resume(surf_action_t action)
 783 {
 784   if (((surf_action_network_CM02_im_t) action)->suspended) {
 785     lmm_update_variable_weight(network_im_maxmin_system,
 786                                ((surf_action_network_CM02_im_t)
 787                                 action)->variable,
 788                                ((surf_action_network_CM02_im_t)
 789                                 action)->weight);
 790     ((surf_action_network_CM02_im_t) action)->suspended = 0;
 791     // remove action from the heap
 792     heap_remove((surf_action_network_CM02_im_t) action);
 793   }
 794 }
 795
 796 static int im_net_action_is_suspended(surf_action_t action)
 797 {
 798   return ((surf_action_network_CM02_im_t) action)->suspended;
 799 }
 800
 801 void im_net_action_set_max_duration(surf_action_t action, double duration)
 802 {
 803   action->max_duration = duration;
 804   // remove action from the heap
 805   heap_remove((surf_action_network_CM02_im_t) action);
 806 }
 807
 808
 809 static void im_net_finalize(void)
 810 {
 811   surf_model_exit(surf_network_model);
 812   surf_network_model = NULL;
 813
 814   global_routing->finalize();
 815
 816   lmm_system_free(network_im_maxmin_system);
 817   network_im_maxmin_system = NULL;
 818
 819   xbt_heap_free(im_net_action_heap);
 820   xbt_swag_free(im_net_modified_set);
 821
 822 }
 823
 824 static void im_surf_network_model_init_internal(void)
 825 {
 826   s_surf_action_network_CM02_im_t comm;
 827
 828   surf_network_model = surf_model_init();
 829
 830   surf_network_model->name = "network";
 831   surf_network_model->action_unref = im_net_action_unref;
 832   surf_network_model->action_cancel = im_net_action_cancel;
 833   surf_network_model->action_recycle = im_net_action_recycle;
 834   surf_network_model->get_remains = im_net_action_get_remains;
 835 #ifdef HAVE_LATENCY_BOUND_TRACKING
 836   surf_network_model->get_latency_limited = im_net_get_link_latency_limited;
 837 #endif
 838
 839   surf_network_model->model_private->resource_used = im_net_resource_used;
 840   surf_network_model->model_private->share_resources = im_net_share_resources;
 841   surf_network_model->model_private->update_actions_state =
 842                   im_net_update_actions_state;
 843   surf_network_model->model_private->update_resource_state =
 844                   im_net_update_resource_state;
 845   surf_network_model->model_private->finalize = im_net_finalize;
 846
 847   surf_network_model->suspend = im_net_action_suspend;
 848   surf_network_model->resume = im_net_action_resume;
 849   surf_network_model->is_suspended = im_net_action_is_suspended;
 850   surf_cpu_model->set_max_duration = im_net_action_set_max_duration;
 851
 852   surf_network_model->extension.network.communicate = im_net_communicate;
 853   surf_network_model->extension.network.get_route = im_net_get_route;
 854   surf_network_model->extension.network.get_link_bandwidth =
 855                   im_net_get_link_bandwidth;
 856   surf_network_model->extension.network.get_link_latency =
 857                   im_net_get_link_latency;
 858   surf_network_model->extension.network.link_shared = im_net_link_shared;
 859   surf_network_model->extension.network.add_traces = im_net_add_traces;
 860   surf_network_model->extension.network.create_resource =
 861                   im_net_create_resource;
 862
 863
 864   if (!network_im_maxmin_system){
 865         sg_maxmin_selective_update = 1;
 866     network_im_maxmin_system = lmm_system_new();
 867   }
 868   im_net_action_heap = xbt_heap_new(8,NULL);
 869
 870   xbt_heap_set_update_callback(im_net_action_heap, im_net_action_update_index_heap);
 871
 872   routing_model_create(sizeof(link_CM02_im_t),
 873       im_net_create_resource(xbt_strdup("__loopback__"),
 874           498000000, NULL, 0.000015, NULL,
 875           SURF_RESOURCE_ON, NULL,
 876           SURF_LINK_FATPIPE, NULL),
 877           im_net_get_link_latency);
 878   im_net_modified_set =
 879       xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
 880 }
 881
 882
 883
 884 /************************************************************************/
 885 /* New model based on optimizations discussed during this thesis        */
 886 /************************************************************************/
 887 void im_surf_network_model_init_LegrandVelho(void)
 888 {
 889
 890   if (surf_network_model)
 891     return;
 892   im_surf_network_model_init_internal();
 893   im_net_define_callbacks();
 894   xbt_dynar_push(model_list, &surf_network_model);
 895   network_im_solve = lmm_solve;
 896
 897   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 898   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 899                             0.92);
 900   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 901 }
 902
 903
 904