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   char *name_link;
 194   double bw_initial;
 195   tmgr_trace_t bw_trace;
 196   double lat_initial;
 197   tmgr_trace_t lat_trace;
 198   e_surf_resource_state_t state_initial_link = SURF_RESOURCE_ON;
 199   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 200   tmgr_trace_t state_trace;
 201   XBT_DEBUG("link_CM02_im");
 202   name_link = xbt_strdup(A_surfxml_link_id);
 203   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 204   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
 205   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 206   lat_trace = tmgr_trace_new(A_surfxml_link_latency_file);
 207
 208   xbt_assert((A_surfxml_link_state == A_surfxml_link_state_ON)
 209               || (A_surfxml_link_state ==
 210                   A_surfxml_link_state_OFF), "Invalid state");
 211   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 212     state_initial_link = SURF_RESOURCE_ON;
 213   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
 214     state_initial_link = SURF_RESOURCE_OFF;
 215
 216   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
 217     policy_initial_link = SURF_LINK_SHARED;
 218   else
 219           {
 220           if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FATPIPE)
 221                   policy_initial_link = SURF_LINK_FATPIPE;
 222           else if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FULLDUPLEX)
 223                   policy_initial_link = SURF_LINK_FULLDUPLEX;
 224           }
 225
 226   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 227
 228   if(policy_initial_link == SURF_LINK_FULLDUPLEX)
 229   {
 230     im_net_create_resource(bprintf("%s_UP",name_link), bw_initial, bw_trace,
 231                        lat_initial, lat_trace, state_initial_link, state_trace,
 232                        policy_initial_link, xbt_dict_new());
 233     im_net_create_resource(bprintf("%s_DOWN",name_link), bw_initial, bw_trace,
 234                        lat_initial, lat_trace, state_initial_link, state_trace,
 235                        policy_initial_link, xbt_dict_new());
 236   }
 237   else
 238   {
 239     im_net_create_resource(name_link, bw_initial, bw_trace,
 240                        lat_initial, lat_trace, state_initial_link, state_trace,
 241                        policy_initial_link, xbt_dict_new());
 242   }
 243
 244 }
 245
 246 static void im_net_add_traces(void)
 247 {
 248   xbt_dict_cursor_t cursor = NULL;
 249   char *trace_name, *elm;
 250
 251   static int called = 0;
 252   if (called)
 253     return;
 254   called = 1;
 255
 256   /* connect all traces relative to network */
 257   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 258     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 259     link_CM02_im_t link =
 260                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 261
 262     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 263                 trace_name, elm);
 264     xbt_assert(trace,
 265                 "Cannot connect trace %s to link %s: trace undefined",
 266                 trace_name, elm);
 267
 268     link->lmm_resource.state_event =
 269         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 270   }
 271
 272   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 273     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 274     link_CM02_im_t link =
 275                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 276
 277     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 278                 trace_name, elm);
 279     xbt_assert(trace,
 280                 "Cannot connect trace %s to link %s: trace undefined",
 281                 trace_name, elm);
 282
 283     link->lmm_resource.power.event =
 284         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 285   }
 286
 287   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 288     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 289     link_CM02_im_t link =
 290                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 291
 292     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 293                 trace_name, elm);
 294     xbt_assert(trace,
 295                 "Cannot connect trace %s to link %s: trace undefined",
 296                 trace_name, elm);
 297
 298     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 299   }
 300 }
 301
 302 static void im_net_define_callbacks(const char *file)
 303 {
 304   /* Figuring out the network links */
 305   surfxml_add_callback(STag_surfxml_link_cb_list, &im_net_parse_link_init);
 306   surfxml_add_callback(ETag_surfxml_platform_cb_list, &im_net_add_traces);
 307 }
 308
 309 static int im_net_resource_used(void *resource_id)
 310 {
 311   return lmm_constraint_used(network_im_maxmin_system,
 312                              ((surf_resource_lmm_t)
 313                               resource_id)->constraint);
 314 }
 315
 316 static int im_net_action_unref(surf_action_t action)
 317 {
 318   action->refcount--;
 319   if (!action->refcount) {
 320     xbt_swag_remove(action, action->state_set);
 321     if (((surf_action_network_CM02_im_t) action)->variable){
 322       lmm_variable_free(network_im_maxmin_system,
 323                         ((surf_action_network_CM02_im_t) action)->variable);
 324     }
 325     // remove action from the heap
 326     heap_remove((surf_action_network_CM02_im_t) action);
 327
 328     xbt_swag_remove(action, im_net_modified_set);
 329 #ifdef HAVE_TRACING
 330     xbt_free(((surf_action_network_CM02_im_t) action)->src_name);
 331     xbt_free(((surf_action_network_CM02_im_t) action)->dst_name);
 332     if (action->category)
 333       xbt_free(action->category);
 334 #endif
 335     surf_action_free(&action);
 336     return 1;
 337   }
 338   return 0;
 339 }
 340
 341
 342
 343 static void im_net_action_cancel(surf_action_t action)
 344 {
 345   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 346
 347   xbt_swag_remove(action, im_net_modified_set);
 348   // remove action from the heap
 349   heap_remove((surf_action_network_CM02_im_t) action);
 350 }
 351
 352 void im_net_action_recycle(surf_action_t action)
 353 {
 354   return;
 355 }
 356
 357 #ifdef HAVE_LATENCY_BOUND_TRACKING
 358 int im_net_get_link_latency_limited(surf_action_t action)
 359 {
 360   return action->latency_limited;
 361 }
 362 #endif
 363
 364 double im_net_action_get_remains(surf_action_t action)
 365 {
 366   /* update remains before return it */
 367   update_action_remaining(surf_get_clock());
 368   return action->remains;
 369 }
 370
 371 static void update_action_remaining(double now){
 372   surf_action_network_CM02_im_t action = NULL;
 373   double delta = 0.0;
 374
 375   xbt_swag_foreach(action, im_net_modified_set) {
 376
 377     if(action->suspended != 0){
 378         continue;
 379     }
 380
 381     delta = now - action->last_update;
 382
 383     double_update(&(action->generic_action.remains),
 384                   lmm_variable_getvalue(action->variable) * delta);
 385
 386     if (action->generic_action.max_duration != NO_MAX_DURATION)
 387       double_update(&(action->generic_action.max_duration), delta);
 388
 389     if ((action->generic_action.remains <= 0) &&
 390         (lmm_get_variable_weight(action->variable) > 0)) {
 391       action->generic_action.finish = surf_get_clock();
 392       surf_network_model->action_state_set((surf_action_t) action,
 393                                            SURF_ACTION_DONE);
 394       heap_remove(action);
 395     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 396                && (action->generic_action.max_duration <= 0)) {
 397       action->generic_action.finish = surf_get_clock();
 398       surf_network_model->action_state_set((surf_action_t) action,
 399                                            SURF_ACTION_DONE);
 400       heap_remove(action);
 401     }
 402
 403     action->last_update = now;
 404   }
 405 }
 406
 407 static double im_net_share_resources(double now)
 408 {
 409   surf_action_network_CM02_im_t action = NULL;
 410   double min=-1;
 411   double value;
 412
 413   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 414   update_action_remaining(now);
 415
 416   lmm_solve(network_im_maxmin_system);
 417
 418   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 419
 420    xbt_swag_foreach(action, im_net_modified_set) {
 421      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 422        continue;
 423      }
 424
 425      /* bogus priority, skip it */
 426      if (GENERIC_ACTION(action).priority <= 0){
 427          continue;
 428      }
 429
 430      min = -1;
 431      value = lmm_variable_getvalue(action->variable);
 432      if (value > 0) {
 433          if (GENERIC_ACTION(action).remains > 0) {
 434              value = GENERIC_ACTION(action).remains / value;
 435              min = now + value;
 436          } else {
 437              value = 0.0;
 438              min = now;
 439          }
 440      }
 441
 442      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 443          && (min == -1
 444              || GENERIC_ACTION(action).start +
 445              GENERIC_ACTION(action).max_duration < min)){
 446        min =   GENERIC_ACTION(action).start +
 447                GENERIC_ACTION(action).max_duration;
 448      }
 449
 450      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 451                 GENERIC_ACTION(action).start, now + value,
 452                 GENERIC_ACTION(action).max_duration);
 453
 454
 455
 456      if (action->index_heap >= 0) {
 457          heap_remove((surf_action_network_CM02_im_t) action);
 458      }
 459
 460      if (min != -1) {
 461          heap_insert((surf_action_network_CM02_im_t) action, min, NORMAL);
 462          XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 463      }
 464    }
 465
 466    //hereafter must have already the min value for this resource model
 467    if(xbt_heap_size(im_net_action_heap) > 0 ){
 468        min = xbt_heap_maxkey(im_net_action_heap) - now ;
 469    }else{
 470        min = -1;
 471    }
 472
 473    XBT_DEBUG("The minimum with the HEAP %lf", min);
 474
 475
 476   return min;
 477 }
 478
 479 static void im_net_update_actions_state(double now, double delta)
 480 {
 481   surf_action_network_CM02_im_t action = NULL;
 482
 483   while ((xbt_heap_size(im_net_action_heap) > 0)
 484          && (double_equals(xbt_heap_maxkey(im_net_action_heap), now))) {
 485     action = xbt_heap_pop(im_net_action_heap);
 486     XBT_DEBUG("Action %p: finish", action);
 487     GENERIC_ACTION(action).finish = surf_get_clock();
 488
 489     // if I am wearing a latency heat
 490     if( action->hat ==  LATENCY){
 491         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 492                                            action->weight);
 493         heap_remove(action);
 494         action->last_update = surf_get_clock();
 495
 496         XBT_DEBUG("Action (%p) is not limited by latency anymore", action);
 497 #ifdef HAVE_LATENCY_BOUND_TRACKING
 498           GENERIC_ACTION(action).latency_limited = 0;
 499 #endif
 500
 501     // if I am wearing a max_duration or normal hat
 502     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 503         // no need to communicate anymore
 504         // assume that flows that reached max_duration have remaining of 0
 505         GENERIC_ACTION(action).remains = 0;
 506         action->generic_action.finish = surf_get_clock();
 507               surf_network_model->action_state_set((surf_action_t) action,
 508                                                    SURF_ACTION_DONE);
 509         heap_remove(action);
 510     }
 511   }
 512   return;
 513 }
 514
 515 static void im_net_update_resource_state(void *id,
 516                                       tmgr_trace_event_t event_type,
 517                                       double value, double date)
 518 {
 519   link_CM02_im_t nw_link = id;
 520   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 521   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 522   /*     value, event_type); */
 523
 524   if (event_type == nw_link->lmm_resource.power.event) {
 525     double delta =
 526         sg_weight_S_parameter / value - sg_weight_S_parameter /
 527         (nw_link->lmm_resource.power.peak *
 528          nw_link->lmm_resource.power.scale);
 529     lmm_variable_t var = NULL;
 530     lmm_element_t elem = NULL;
 531     surf_action_network_CM02_im_t action = NULL;
 532
 533     nw_link->lmm_resource.power.peak = value;
 534     lmm_update_constraint_bound(network_im_maxmin_system,
 535                                 nw_link->lmm_resource.constraint,
 536                                 sg_bandwidth_factor *
 537                                 (nw_link->lmm_resource.power.peak *
 538                                  nw_link->lmm_resource.power.scale));
 539 #ifdef HAVE_TRACING
 540     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 541                                   sg_bandwidth_factor *
 542                                   (nw_link->lmm_resource.power.peak *
 543                                    nw_link->lmm_resource.power.scale));
 544 #endif
 545     if (sg_weight_S_parameter > 0) {
 546       while ((var = lmm_get_var_from_cnst
 547               (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 548                &elem))) {
 549         action = lmm_variable_id(var);
 550         action->weight += delta;
 551         if (!(action->suspended))
 552           lmm_update_variable_weight(network_im_maxmin_system,
 553                                      action->variable, action->weight);
 554       }
 555     }
 556     if (tmgr_trace_event_free(event_type))
 557       nw_link->lmm_resource.power.event = NULL;
 558   } else if (event_type == nw_link->lat_event) {
 559     double delta = value - nw_link->lat_current;
 560     lmm_variable_t var = NULL;
 561     lmm_element_t elem = NULL;
 562     surf_action_network_CM02_im_t action = NULL;
 563
 564     nw_link->lat_current = value;
 565     while ((var = lmm_get_var_from_cnst
 566             (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 567              &elem))) {
 568       action = lmm_variable_id(var);
 569       action->lat_current += delta;
 570       action->weight += delta;
 571       if (action->rate < 0)
 572         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 573                                   sg_tcp_gamma / (2.0 *
 574                                                   action->lat_current));
 575       else {
 576         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 577                                   min(action->rate,
 578                                       sg_tcp_gamma / (2.0 *
 579                                                       action->lat_current)));
 580
 581         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 582           XBT_INFO("Flow is limited BYBANDWIDTH");
 583         } else {
 584           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 585                 action->lat_current);
 586         }
 587       }
 588       if (!(action->suspended))
 589         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 590                                    action->weight);
 591
 592     }
 593     if (tmgr_trace_event_free(event_type))
 594       nw_link->lat_event = NULL;
 595   } else if (event_type == nw_link->lmm_resource.state_event) {
 596     if (value > 0)
 597       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 598     else {
 599       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 600       lmm_variable_t var = NULL;
 601       lmm_element_t elem = NULL;
 602
 603       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 604       while ((var = lmm_get_var_from_cnst
 605               (network_im_maxmin_system, cnst, &elem))) {
 606         surf_action_t action = lmm_variable_id(var);
 607
 608         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 609             surf_action_state_get(action) == SURF_ACTION_READY) {
 610           action->finish = date;
 611           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 612         }
 613       }
 614     }
 615     if (tmgr_trace_event_free(event_type))
 616       nw_link->lmm_resource.state_event = NULL;
 617   } else {
 618     XBT_CRITICAL("Unknown event ! \n");
 619     xbt_abort();
 620   }
 621
 622   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 623   return;
 624 }
 625
 626
 627 static surf_action_t im_net_communicate(const char *src_name,
 628                                      const char *dst_name, double size,
 629                                      double rate)
 630 {
 631   unsigned int i;
 632   link_CM02_im_t link;
 633   int failed = 0;
 634   surf_action_network_CM02_im_t action = NULL;
 635   double bandwidth_bound;
 636   /* LARGE PLATFORMS HACK:
 637      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
 638      Use the cluster_id for ->id */
 639
 640   xbt_dynar_t back_route = NULL;
 641   int constraints_per_variable = 0;
 642   // I will need this route for some time so let's call get_route_no_cleanup
 643   xbt_dynar_t route = global_routing->get_route_no_cleanup(src_name, dst_name);
 644
 645
 646   if (sg_network_fullduplex == 1) {
 647     back_route = global_routing->get_route(dst_name, src_name);
 648   }
 649
 650   /* LARGE PLATFORMS HACK:
 651      total_route_size = route_size + src->link_nb + dst->nb */
 652
 653   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 654   /* LARGE PLATFORMS HACK:
 655      assert on total_route_size */
 656   xbt_assert(xbt_dynar_length(route),
 657               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 658               src_name, dst_name);
 659
 660   xbt_dynar_foreach(route, i, link) {
 661     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 662       failed = 1;
 663       break;
 664     }
 665   }
 666   action =
 667       surf_action_new(sizeof(s_surf_action_network_CM02_im_t), size,
 668                       surf_network_model, failed);
 669
 670
 671 #ifdef HAVE_LATENCY_BOUND_TRACKING
 672   (action->generic_action).latency_limited = 0;
 673 #endif
 674
 675   xbt_swag_insert(action, action->generic_action.state_set);
 676   action->rate = rate;
 677   action->index_heap = -1;
 678   action->latency = 0.0;
 679   action->weight = 0.0;
 680   action->last_update = surf_get_clock();
 681
 682   bandwidth_bound = -1.0;
 683   xbt_dynar_foreach(route, i, link) {
 684     action->latency += link->lat_current;
 685     action->weight +=
 686         link->lat_current +
 687         sg_weight_S_parameter /
 688         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 689     if (bandwidth_bound < 0.0)
 690       bandwidth_bound =
 691           (*im_bandwidth_factor_callback) (size) *
 692           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 693     else
 694       bandwidth_bound =
 695           min(bandwidth_bound,
 696               (*im_bandwidth_factor_callback) (size) *
 697               (link->lmm_resource.power.peak *
 698                link->lmm_resource.power.scale));
 699   }
 700   /* LARGE PLATFORMS HACK:
 701      Add src->link and dst->link latencies */
 702   action->lat_current = action->latency;
 703   action->latency *= (*im_latency_factor_callback) (size);
 704   action->rate =
 705       (*im_bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 706                                         size);
 707
 708   /* LARGE PLATFORMS HACK:
 709      lmm_variable_new(..., total_route_size) */
 710   if (back_route != NULL) {
 711     constraints_per_variable =
 712         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 713   } else {
 714     constraints_per_variable = xbt_dynar_length(route);
 715   }
 716
 717   if (action->latency > 0){
 718       action->variable =
 719         lmm_variable_new(network_im_maxmin_system, action, 0.0, -1.0,
 720                          constraints_per_variable);
 721     // add to the heap the event when the latency is payed
 722     XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 723     heap_insert(action, action->latency + action->last_update, LATENCY);
 724 #ifdef HAVE_LATENCY_BOUND_TRACKING
 725         (action->generic_action).latency_limited = 1;
 726 #endif
 727   }
 728   else
 729     action->variable =
 730         lmm_variable_new(network_im_maxmin_system, action, 1.0, -1.0,
 731                          constraints_per_variable);
 732
 733   if (action->rate < 0) {
 734     if (action->lat_current > 0)
 735       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 736                                 sg_tcp_gamma / (2.0 *
 737                                                 action->lat_current));
 738     else
 739       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 740                                 -1.0);
 741   } else {
 742     if (action->lat_current > 0)
 743       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 744                                 min(action->rate,
 745                                     sg_tcp_gamma / (2.0 *
 746                                                     action->lat_current)));
 747     else
 748       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 749                                 action->rate);
 750   }
 751
 752   xbt_dynar_foreach(route, i, link) {
 753     lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 754                action->variable, 1.0);
 755   }
 756
 757   if (sg_network_fullduplex == 1) {
 758     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 759     xbt_dynar_foreach(back_route, i, link) {
 760       lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 761                  action->variable, .05);
 762     }
 763   }
 764
 765   /* LARGE PLATFORMS HACK:
 766      expand also with src->link and dst->link */
 767 #ifdef HAVE_TRACING
 768   if (TRACE_is_enabled()) {
 769     action->src_name = xbt_strdup(src_name);
 770     action->dst_name = xbt_strdup(dst_name);
 771   } else {
 772     action->src_name = action->dst_name = NULL;
 773   }
 774 #endif
 775
 776   xbt_dynar_free(&route);
 777   XBT_OUT();
 778
 779   return (surf_action_t) action;
 780 }
 781
 782 static xbt_dynar_t im_net_get_route(const char *src, const char *dst)
 783 {
 784   return global_routing->get_route(src, dst);
 785 }
 786
 787 static double im_net_get_link_bandwidth(const void *link)
 788 {
 789   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 790   return lmm->power.peak * lmm->power.scale;
 791 }
 792
 793 static double im_net_get_link_latency(const void *link)
 794 {
 795   return ((link_CM02_im_t) link)->lat_current;
 796 }
 797
 798 static int im_net_link_shared(const void *link)
 799 {
 800   return
 801       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 802 }
 803
 804 static void im_net_action_suspend(surf_action_t action)
 805 {
 806   ((surf_action_network_CM02_im_t) action)->suspended = 1;
 807   lmm_update_variable_weight(network_im_maxmin_system,
 808                              ((surf_action_network_CM02_im_t)
 809                               action)->variable, 0.0);
 810
 811   // remove action from the heap
 812   heap_remove((surf_action_network_CM02_im_t) action);
 813 }
 814
 815 static void im_net_action_resume(surf_action_t action)
 816 {
 817   if (((surf_action_network_CM02_im_t) action)->suspended) {
 818     lmm_update_variable_weight(network_im_maxmin_system,
 819                                ((surf_action_network_CM02_im_t)
 820                                 action)->variable,
 821                                ((surf_action_network_CM02_im_t)
 822                                 action)->weight);
 823     ((surf_action_network_CM02_im_t) action)->suspended = 0;
 824     // remove action from the heap
 825     heap_remove((surf_action_network_CM02_im_t) action);
 826   }
 827 }
 828
 829 static int im_net_action_is_suspended(surf_action_t action)
 830 {
 831   return ((surf_action_network_CM02_im_t) action)->suspended;
 832 }
 833
 834 void im_net_action_set_max_duration(surf_action_t action, double duration)
 835 {
 836   action->max_duration = duration;
 837   // remove action from the heap
 838   heap_remove((surf_action_network_CM02_im_t) action);
 839 }
 840
 841
 842 static void im_net_finalize(void)
 843 {
 844   surf_model_exit(surf_network_model);
 845   surf_network_model = NULL;
 846
 847   global_routing->finalize();
 848
 849   lmm_system_free(network_im_maxmin_system);
 850   network_im_maxmin_system = NULL;
 851
 852   xbt_heap_free(im_net_action_heap);
 853   xbt_swag_free(im_net_modified_set);
 854
 855 }
 856
 857 static void im_surf_network_model_init_internal(void)
 858 {
 859   s_surf_action_network_CM02_im_t comm;
 860
 861   surf_network_model = surf_model_init();
 862
 863   surf_network_model->name = "network";
 864   surf_network_model->action_unref = im_net_action_unref;
 865   surf_network_model->action_cancel = im_net_action_cancel;
 866   surf_network_model->action_recycle = im_net_action_recycle;
 867   surf_network_model->get_remains = im_net_action_get_remains;
 868 #ifdef HAVE_LATENCY_BOUND_TRACKING
 869   surf_network_model->get_latency_limited = im_net_get_link_latency_limited;
 870 #endif
 871
 872   surf_network_model->model_private->resource_used = im_net_resource_used;
 873   surf_network_model->model_private->share_resources = im_net_share_resources;
 874   surf_network_model->model_private->update_actions_state =
 875                   im_net_update_actions_state;
 876   surf_network_model->model_private->update_resource_state =
 877                   im_net_update_resource_state;
 878   surf_network_model->model_private->finalize = im_net_finalize;
 879
 880   surf_network_model->suspend = im_net_action_suspend;
 881   surf_network_model->resume = im_net_action_resume;
 882   surf_network_model->is_suspended = im_net_action_is_suspended;
 883   surf_cpu_model->set_max_duration = im_net_action_set_max_duration;
 884
 885   surf_network_model->extension.network.communicate = im_net_communicate;
 886   surf_network_model->extension.network.get_route = im_net_get_route;
 887   surf_network_model->extension.network.get_link_bandwidth =
 888                   im_net_get_link_bandwidth;
 889   surf_network_model->extension.network.get_link_latency =
 890                   im_net_get_link_latency;
 891   surf_network_model->extension.network.link_shared = im_net_link_shared;
 892   surf_network_model->extension.network.add_traces = im_net_add_traces;
 893   surf_network_model->extension.network.create_resource =
 894                   im_net_create_resource;
 895
 896
 897   if (!network_im_maxmin_system){
 898         sg_maxmin_selective_update = 1;
 899     network_im_maxmin_system = lmm_system_new();
 900   }
 901   im_net_action_heap = xbt_heap_new(8,NULL);
 902
 903   xbt_heap_set_update_callback(im_net_action_heap, im_net_action_update_index_heap);
 904
 905   routing_model_create(sizeof(link_CM02_im_t),
 906       im_net_create_resource(xbt_strdup("__loopback__"),
 907           498000000, NULL, 0.000015, NULL,
 908           SURF_RESOURCE_ON, NULL,
 909           SURF_LINK_FATPIPE, NULL),
 910           im_net_get_link_latency);
 911   im_net_modified_set =
 912       xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
 913   keep_track = im_net_modified_set;
 914 }
 915
 916
 917
 918 /************************************************************************/
 919 /* New model based on optimizations discussed during this thesis        */
 920 /************************************************************************/
 921 void im_surf_network_model_init_LegrandVelho(const char *filename)
 922 {
 923
 924   if (surf_network_model)
 925     return;
 926   im_surf_network_model_init_internal();
 927   im_net_define_callbacks(filename);
 928   xbt_dynar_push(model_list, &surf_network_model);
 929   network_im_solve = lmm_solve;
 930
 931   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 932   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 933                             0.92);
 934   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 935
 936   update_model_description(surf_network_model_description,
 937                            "LV08", surf_network_model);
 938 }
 939
 940
 941