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