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