src/surf/network_im.c

   1
   2 /*
   3  * Network with improved management of tasks, IM (Improved Management).
   4  * Uses a heap to store actions so that the share_resources is faster.
   5  * This model automatically sets the selective update flag to 1 and is
   6  * highly dependent on the maxmin lmm module.
   7  */
   8
   9 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
  10  * All rights reserved.                                                     */
  11
  12 /* This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the license (GNU LGPL) which comes with this package. */
  14
  15 #include "xbt/log.h"
  16 #include "xbt/str.h"
  17 #include "surf_private.h"
  18 #include "xbt/dict.h"
  19 #include "maxmin_private.h"
  20 #include "surf/surf_resource_lmm.h"
  21
  22
  23 #undef GENERIC_ACTION
  24 #define GENERIC_ACTION(action) action->generic_action
  25
  26
  27 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_im, surf,
  28                                 "Logging specific to the SURF network module");
  29
  30
  31 enum heap_action_type{
  32   LATENCY = 100,
  33   MAX_DURATION,
  34   NORMAL,
  35   NOTSET
  36 };
  37
  38 typedef struct surf_action_network_CM02_im {
  39   s_surf_action_t generic_action;
  40   s_xbt_swag_hookup_t action_list_hookup;
  41   double latency;
  42   double lat_current;
  43   double weight;
  44   lmm_variable_t variable;
  45   double rate;
  46 #ifdef HAVE_LATENCY_BOUND_TRACKING
  47   int latency_limited;
  48 #endif
  49   int suspended;
  50 #ifdef HAVE_TRACING
  51   char *src_name;
  52   char *dst_name;
  53 #endif
  54   int index_heap;
  55   enum heap_action_type hat;
  56   double last_update;
  57 } s_surf_action_network_CM02_im_t, *surf_action_network_CM02_im_t;
  58
  59
  60 typedef struct network_link_CM02_im {
  61   s_surf_resource_lmm_t lmm_resource;   /* must remain first to be added to a trace */
  62
  63   /* Using this object with the public part of
  64      model does not make sense */
  65   double lat_current;
  66   tmgr_trace_event_t lat_event;
  67 } s_link_CM02_im_t, *link_CM02_im_t;
  68
  69
  70
  71
  72
  73
  74
  75
  76 extern surf_model_t surf_network_model;
  77 static lmm_system_t network_im_maxmin_system = NULL;
  78 static void (*network_im_solve) (lmm_system_t) = NULL;
  79
  80 extern double sg_latency_factor;
  81 extern double sg_bandwidth_factor;
  82 extern double sg_weight_S_parameter;
  83
  84 extern double sg_tcp_gamma;
  85 extern int sg_network_fullduplex;
  86
  87
  88 static void im_net_action_recycle(surf_action_t action);
  89 static int im_net_get_link_latency_limited(surf_action_t action);
  90 static int im_net_action_is_suspended(surf_action_t action);
  91 static double im_net_action_get_remains(surf_action_t action);
  92 static void im_net_action_set_max_duration(surf_action_t action, double duration);
  93 static void im_net_update_actions_state(double now, double delta);
  94 static void update_action_remaining(double now);
  95
  96 static xbt_swag_t im_net_modified_set = NULL;
  97 static xbt_heap_t im_net_action_heap = NULL;
  98 xbt_swag_t keep_track = NULL;
  99 extern int sg_maxmin_selective_update;
 100
 101 /* added to manage the communication action's heap */
 102 static void im_net_action_update_index_heap(void *action, int i)
 103 {
 104   ((surf_action_network_CM02_im_t) action)->index_heap = i;
 105 }
 106
 107 /* insert action on heap using a given key and a hat (heap_action_type)
 108  * a hat can be of three types for communications:
 109  *
 110  * NORMAL = this is a normal heap entry stating the date to finish transmitting
 111  * LATENCY = this is a heap entry to warn us when the latency is payed
 112  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
 113  */
 114 static void heap_insert(surf_action_network_CM02_im_t    action, double key, enum heap_action_type hat){
 115   action->hat = hat;
 116   xbt_heap_push(im_net_action_heap, action, key);
 117 }
 118
 119 static void heap_remove(surf_action_network_CM02_im_t action){
 120   action->hat = NONE;
 121   if(((surf_action_network_CM02_im_t) action)->index_heap >= 0){
 122       xbt_heap_remove(im_net_action_heap,action->index_heap);
 123   }
 124 }
 125
 126 /******************************************************************************/
 127 /*                           Factors callbacks                                */
 128 /******************************************************************************/
 129 static double im_constant_latency_factor(double size)
 130 {
 131   return sg_latency_factor;
 132 }
 133
 134 static double im_constant_bandwidth_factor(double size)
 135 {
 136   return sg_bandwidth_factor;
 137 }
 138
 139 static double im_constant_bandwidth_constraint(double rate, double bound,
 140                                             double size)
 141 {
 142   return rate;
 143 }
 144
 145
 146 static double (*im_latency_factor_callback) (double) =
 147     &im_constant_latency_factor;
 148 static double (*im_bandwidth_factor_callback) (double) =
 149     &im_constant_bandwidth_factor;
 150 static double (*im_bandwidth_constraint_callback) (double, double, double) =
 151     &im_constant_bandwidth_constraint;
 152
 153
 154 static void* im_net_create_resource(const char *name,
 155                                 double bw_initial,
 156                                 tmgr_trace_t bw_trace,
 157                                 double lat_initial,
 158                                 tmgr_trace_t lat_trace,
 159                                 e_surf_resource_state_t
 160                                 state_initial,
 161                                 tmgr_trace_t state_trace,
 162                                 e_surf_link_sharing_policy_t
 163                                 policy, xbt_dict_t properties)
 164 {
 165   link_CM02_im_t nw_link = (link_CM02_im_t)
 166       surf_resource_lmm_new(sizeof(s_link_CM02_im_t),
 167                             surf_network_model, name, properties,
 168                             network_im_maxmin_system,
 169                             sg_bandwidth_factor * bw_initial,
 170                             history,
 171                             state_initial, state_trace,
 172                             bw_initial, bw_trace);
 173
 174   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 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_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 187
 188   return nw_link;
 189 }
 190
 191 static void im_net_parse_link_init(sg_platf_link_cbarg_t link)
 192 {
 193   if(link->policy == SURF_LINK_FULLDUPLEX)
 194   {
 195     char *name = bprintf("%s_UP",link->id);
 196           im_net_create_resource(name, link->bandwidth, link->bandwidth_trace,
 197                        link->latency, link->latency_trace, link->state, link->state_trace,
 198                        link->policy, link->properties);
 199           xbt_free(name);
 200           name = bprintf("%s_DOWN",link->id);
 201           im_net_create_resource(name, link->bandwidth, link->bandwidth_trace,
 202             link->latency, link->latency_trace, link->state, link->state_trace,
 203             link->policy, NULL); // FIXME: We need to deep copy the properties or we won't be able to free it
 204           xbt_free(name);
 205   }
 206   else
 207   {
 208           im_net_create_resource(link->id, link->bandwidth, link->bandwidth_trace,
 209                 link->latency, link->latency_trace, link->state, link->state_trace,
 210                        link->policy, link->properties);
 211   }
 212 }
 213
 214 static void im_net_add_traces(void)
 215 {
 216   xbt_dict_cursor_t cursor = NULL;
 217   char *trace_name, *elm;
 218
 219   static int called = 0;
 220   if (called)
 221     return;
 222   called = 1;
 223
 224   /* connect all traces relative to network */
 225   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 226     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 227     link_CM02_im_t link =
 228                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 229
 230     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 231                 trace_name, elm);
 232     xbt_assert(trace,
 233                 "Cannot connect trace %s to link %s: trace undefined",
 234                 trace_name, elm);
 235
 236     link->lmm_resource.state_event =
 237         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 238   }
 239
 240   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 241     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 242     link_CM02_im_t link =
 243                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 244
 245     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 246                 trace_name, elm);
 247     xbt_assert(trace,
 248                 "Cannot connect trace %s to link %s: trace undefined",
 249                 trace_name, elm);
 250
 251     link->lmm_resource.power.event =
 252         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 253   }
 254
 255   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 256     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 257     link_CM02_im_t link =
 258                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 259
 260     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 261                 trace_name, elm);
 262     xbt_assert(trace,
 263                 "Cannot connect trace %s to link %s: trace undefined",
 264                 trace_name, elm);
 265
 266     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 267   }
 268 }
 269
 270 static void im_net_define_callbacks(void)
 271 {
 272   /* Figuring out the network links */
 273   sg_platf_link_add_cb(im_net_parse_link_init);
 274   sg_platf_postparse_add_cb(im_net_add_traces);
 275 }
 276
 277 static int im_net_resource_used(void *resource_id)
 278 {
 279   return lmm_constraint_used(network_im_maxmin_system,
 280                              ((surf_resource_lmm_t)
 281                               resource_id)->constraint);
 282 }
 283
 284 static int im_net_action_unref(surf_action_t action)
 285 {
 286   action->refcount--;
 287   if (!action->refcount) {
 288     xbt_swag_remove(action, action->state_set);
 289     if (((surf_action_network_CM02_im_t) action)->variable){
 290       lmm_variable_free(network_im_maxmin_system,
 291                         ((surf_action_network_CM02_im_t) action)->variable);
 292     }
 293     // remove action from the heap
 294     heap_remove((surf_action_network_CM02_im_t) action);
 295
 296     xbt_swag_remove(action, im_net_modified_set);
 297 #ifdef HAVE_TRACING
 298     xbt_free(((surf_action_network_CM02_im_t) action)->src_name);
 299     xbt_free(((surf_action_network_CM02_im_t) action)->dst_name);
 300     xbt_free(action->category);
 301 #endif
 302     surf_action_free(&action);
 303     return 1;
 304   }
 305   return 0;
 306 }
 307
 308
 309
 310 static void im_net_action_cancel(surf_action_t action)
 311 {
 312   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 313
 314   xbt_swag_remove(action, im_net_modified_set);
 315   // remove action from the heap
 316   heap_remove((surf_action_network_CM02_im_t) action);
 317 }
 318
 319 static void im_net_action_recycle(surf_action_t action)
 320 {
 321   return;
 322 }
 323
 324 #ifdef HAVE_LATENCY_BOUND_TRACKING
 325 static int im_net_get_link_latency_limited(surf_action_t action)
 326 {
 327   return action->latency_limited;
 328 }
 329 #endif
 330
 331 static double im_net_action_get_remains(surf_action_t action)
 332 {
 333   /* update remains before return it */
 334   update_action_remaining(surf_get_clock());
 335   return action->remains;
 336 }
 337
 338 static void update_action_remaining(double now){
 339   surf_action_network_CM02_im_t action = NULL;
 340   double delta = 0.0;
 341
 342   xbt_swag_foreach(action, im_net_modified_set) {
 343
 344     if(action->suspended != 0){
 345         continue;
 346     }
 347
 348     delta = now - action->last_update;
 349
 350     double_update(&(action->generic_action.remains),
 351                   lmm_variable_getvalue(action->variable) * delta);
 352
 353     if (action->generic_action.max_duration != NO_MAX_DURATION)
 354       double_update(&(action->generic_action.max_duration), delta);
 355
 356     if ((action->generic_action.remains <= 0) &&
 357         (lmm_get_variable_weight(action->variable) > 0)) {
 358       action->generic_action.finish = surf_get_clock();
 359       surf_network_model->action_state_set((surf_action_t) action,
 360                                            SURF_ACTION_DONE);
 361       heap_remove(action);
 362     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 363                && (action->generic_action.max_duration <= 0)) {
 364       action->generic_action.finish = surf_get_clock();
 365       surf_network_model->action_state_set((surf_action_t) action,
 366                                            SURF_ACTION_DONE);
 367       heap_remove(action);
 368     }
 369
 370     action->last_update = now;
 371   }
 372 }
 373
 374 static double im_net_share_resources(double now)
 375 {
 376   surf_action_network_CM02_im_t action = NULL;
 377   double min=-1;
 378   double value;
 379
 380   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 381   update_action_remaining(now);
 382
 383   keep_track = im_net_modified_set;
 384   lmm_solve(network_im_maxmin_system);
 385   keep_track = NULL;
 386
 387   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 388
 389    xbt_swag_foreach(action, im_net_modified_set) {
 390      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 391        continue;
 392      }
 393
 394      /* bogus priority, skip it */
 395      if (GENERIC_ACTION(action).priority <= 0){
 396          continue;
 397      }
 398
 399      min = -1;
 400      value = lmm_variable_getvalue(action->variable);
 401      if (value > 0) {
 402          if (GENERIC_ACTION(action).remains > 0) {
 403              value = GENERIC_ACTION(action).remains / value;
 404              min = now + value;
 405          } else {
 406              value = 0.0;
 407              min = now;
 408          }
 409      }
 410
 411      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 412          && (min == -1
 413              || GENERIC_ACTION(action).start +
 414              GENERIC_ACTION(action).max_duration < min)){
 415        min =   GENERIC_ACTION(action).start +
 416                GENERIC_ACTION(action).max_duration;
 417      }
 418
 419      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 420                 GENERIC_ACTION(action).start, now + value,
 421                 GENERIC_ACTION(action).max_duration);
 422
 423
 424
 425      if (action->index_heap >= 0) {
 426          heap_remove((surf_action_network_CM02_im_t) action);
 427      }
 428
 429      if (min != -1) {
 430          heap_insert((surf_action_network_CM02_im_t) action, min, NORMAL);
 431          XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 432      }
 433    }
 434
 435    //hereafter must have already the min value for this resource model
 436    if(xbt_heap_size(im_net_action_heap) > 0 ){
 437        min = xbt_heap_maxkey(im_net_action_heap) - now ;
 438    }else{
 439        min = -1;
 440    }
 441
 442    XBT_DEBUG("The minimum with the HEAP %lf", min);
 443
 444
 445   return min;
 446 }
 447
 448 static void im_net_update_actions_state(double now, double delta)
 449 {
 450   surf_action_network_CM02_im_t action = NULL;
 451
 452   while ((xbt_heap_size(im_net_action_heap) > 0)
 453          && (double_equals(xbt_heap_maxkey(im_net_action_heap), now))) {
 454     action = xbt_heap_pop(im_net_action_heap);
 455     XBT_DEBUG("Action %p: finish", action);
 456     GENERIC_ACTION(action).finish = surf_get_clock();
 457
 458     // if I am wearing a latency heat
 459     if( action->hat ==  LATENCY){
 460         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 461                                            action->weight);
 462         heap_remove(action);
 463         action->last_update = surf_get_clock();
 464
 465         XBT_DEBUG("Action (%p) is not limited by latency anymore", action);
 466 #ifdef HAVE_LATENCY_BOUND_TRACKING
 467           GENERIC_ACTION(action).latency_limited = 0;
 468 #endif
 469
 470     // if I am wearing a max_duration or normal hat
 471     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 472         // no need to communicate anymore
 473         // assume that flows that reached max_duration have remaining of 0
 474         GENERIC_ACTION(action).remains = 0;
 475         action->generic_action.finish = surf_get_clock();
 476               surf_network_model->action_state_set((surf_action_t) action,
 477                                                    SURF_ACTION_DONE);
 478         heap_remove(action);
 479     }
 480   }
 481   return;
 482 }
 483
 484 static void im_net_update_resource_state(void *id,
 485                                       tmgr_trace_event_t event_type,
 486                                       double value, double date)
 487 {
 488   link_CM02_im_t nw_link = id;
 489   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 490   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 491   /*     value, event_type); */
 492
 493   if (event_type == nw_link->lmm_resource.power.event) {
 494     double delta =
 495         sg_weight_S_parameter / value - sg_weight_S_parameter /
 496         (nw_link->lmm_resource.power.peak *
 497          nw_link->lmm_resource.power.scale);
 498     lmm_variable_t var = NULL;
 499     lmm_element_t elem = NULL;
 500     surf_action_network_CM02_im_t action = NULL;
 501
 502     nw_link->lmm_resource.power.peak = value;
 503     lmm_update_constraint_bound(network_im_maxmin_system,
 504                                 nw_link->lmm_resource.constraint,
 505                                 sg_bandwidth_factor *
 506                                 (nw_link->lmm_resource.power.peak *
 507                                  nw_link->lmm_resource.power.scale));
 508 #ifdef HAVE_TRACING
 509     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 510                                   sg_bandwidth_factor *
 511                                   (nw_link->lmm_resource.power.peak *
 512                                    nw_link->lmm_resource.power.scale));
 513 #endif
 514     if (sg_weight_S_parameter > 0) {
 515       while ((var = lmm_get_var_from_cnst
 516               (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 517                &elem))) {
 518         action = lmm_variable_id(var);
 519         action->weight += delta;
 520         if (!(action->suspended))
 521           lmm_update_variable_weight(network_im_maxmin_system,
 522                                      action->variable, action->weight);
 523       }
 524     }
 525     if (tmgr_trace_event_free(event_type))
 526       nw_link->lmm_resource.power.event = NULL;
 527   } else if (event_type == nw_link->lat_event) {
 528     double delta = value - nw_link->lat_current;
 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->lat_current = value;
 534     while ((var = lmm_get_var_from_cnst
 535             (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 536              &elem))) {
 537       action = lmm_variable_id(var);
 538       action->lat_current += delta;
 539       action->weight += delta;
 540       if (action->rate < 0)
 541         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 542                                   sg_tcp_gamma / (2.0 *
 543                                                   action->lat_current));
 544       else {
 545         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 546                                   min(action->rate,
 547                                       sg_tcp_gamma / (2.0 *
 548                                                       action->lat_current)));
 549
 550         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 551           XBT_INFO("Flow is limited BYBANDWIDTH");
 552         } else {
 553           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 554                 action->lat_current);
 555         }
 556       }
 557       if (!(action->suspended))
 558         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 559                                    action->weight);
 560
 561     }
 562     if (tmgr_trace_event_free(event_type))
 563       nw_link->lat_event = NULL;
 564   } else if (event_type == nw_link->lmm_resource.state_event) {
 565     if (value > 0)
 566       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 567     else {
 568       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 569       lmm_variable_t var = NULL;
 570       lmm_element_t elem = NULL;
 571
 572       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 573       while ((var = lmm_get_var_from_cnst
 574               (network_im_maxmin_system, cnst, &elem))) {
 575         surf_action_t action = lmm_variable_id(var);
 576
 577         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 578             surf_action_state_get(action) == SURF_ACTION_READY) {
 579           action->finish = date;
 580           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 581         }
 582       }
 583     }
 584     if (tmgr_trace_event_free(event_type))
 585       nw_link->lmm_resource.state_event = NULL;
 586   } else {
 587     XBT_CRITICAL("Unknown event ! \n");
 588     xbt_abort();
 589   }
 590
 591   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 592   return;
 593 }
 594
 595
 596 static surf_action_t im_net_communicate(const char *src_name,
 597                                      const char *dst_name, double size,
 598                                      double rate)
 599 {
 600   unsigned int i;
 601   link_CM02_im_t link;
 602   int failed = 0;
 603   surf_action_network_CM02_im_t action = NULL;
 604   double bandwidth_bound;
 605   /* LARGE PLATFORMS HACK:
 606      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
 607      Use the cluster_id for ->id */
 608
 609   xbt_dynar_t back_route = NULL;
 610   int constraints_per_variable = 0;
 611   // I need to have the forward and backward routes at the same time, so allocate "route". That way, the routing wont clean it up
 612   xbt_dynar_t route=xbt_dynar_new(global_routing->size_of_link,NULL);
 613   routing_get_route_and_latency(src_name, dst_name,&route,NULL);
 614
 615
 616   if (sg_network_fullduplex == 1) {
 617     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 618   }
 619
 620   /* LARGE PLATFORMS HACK:
 621      total_route_size = route_size + src->link_nb + dst->nb */
 622
 623   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 624   /* LARGE PLATFORMS HACK:
 625      assert on total_route_size */
 626   xbt_assert(xbt_dynar_length(route),
 627               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 628               src_name, dst_name);
 629
 630   xbt_dynar_foreach(route, i, link) {
 631     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 632       failed = 1;
 633       break;
 634     }
 635   }
 636   action =
 637       surf_action_new(sizeof(s_surf_action_network_CM02_im_t), size,
 638                       surf_network_model, failed);
 639
 640
 641 #ifdef HAVE_LATENCY_BOUND_TRACKING
 642   (action->generic_action).latency_limited = 0;
 643 #endif
 644
 645   xbt_swag_insert(action, action->generic_action.state_set);
 646   action->rate = rate;
 647   action->index_heap = -1;
 648   action->latency = 0.0;
 649   action->weight = 0.0;
 650   action->last_update = surf_get_clock();
 651
 652   bandwidth_bound = -1.0;
 653   xbt_dynar_foreach(route, i, link) {
 654     action->latency += link->lat_current;
 655     action->weight +=
 656         link->lat_current +
 657         sg_weight_S_parameter /
 658         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 659     if (bandwidth_bound < 0.0)
 660       bandwidth_bound =
 661           im_bandwidth_factor_callback(size) *
 662           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 663     else
 664       bandwidth_bound =
 665           min(bandwidth_bound,
 666               im_bandwidth_factor_callback(size) *
 667               (link->lmm_resource.power.peak *
 668                link->lmm_resource.power.scale));
 669   }
 670   /* LARGE PLATFORMS HACK:
 671      Add src->link and dst->link latencies */
 672   action->lat_current = action->latency;
 673   action->latency *= im_latency_factor_callback(size);
 674   action->rate =
 675       im_bandwidth_constraint_callback(action->rate, bandwidth_bound,
 676                                         size);
 677
 678   /* LARGE PLATFORMS HACK:
 679      lmm_variable_new(..., total_route_size) */
 680   if (back_route != NULL) {
 681     constraints_per_variable =
 682         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 683   } else {
 684     constraints_per_variable = xbt_dynar_length(route);
 685   }
 686
 687   if (action->latency > 0){
 688       action->variable =
 689         lmm_variable_new(network_im_maxmin_system, action, 0.0, -1.0,
 690                          constraints_per_variable);
 691     // add to the heap the event when the latency is payed
 692     XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 693     heap_insert(action, action->latency + action->last_update, LATENCY);
 694 #ifdef HAVE_LATENCY_BOUND_TRACKING
 695         (action->generic_action).latency_limited = 1;
 696 #endif
 697   }
 698   else
 699     action->variable =
 700         lmm_variable_new(network_im_maxmin_system, action, 1.0, -1.0,
 701                          constraints_per_variable);
 702
 703   if (action->rate < 0) {
 704     if (action->lat_current > 0)
 705       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 706                                 sg_tcp_gamma / (2.0 *
 707                                                 action->lat_current));
 708     else
 709       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 710                                 -1.0);
 711   } else {
 712     if (action->lat_current > 0)
 713       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 714                                 min(action->rate,
 715                                     sg_tcp_gamma / (2.0 *
 716                                                     action->lat_current)));
 717     else
 718       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 719                                 action->rate);
 720   }
 721
 722   xbt_dynar_foreach(route, i, link) {
 723     lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 724                action->variable, 1.0);
 725   }
 726
 727   if (sg_network_fullduplex == 1) {
 728     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 729     xbt_dynar_foreach(back_route, i, link) {
 730       lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 731                  action->variable, .05);
 732     }
 733   }
 734
 735   /* LARGE PLATFORMS HACK:
 736      expand also with src->link and dst->link */
 737 #ifdef HAVE_TRACING
 738   if (TRACE_is_enabled()) {
 739     action->src_name = xbt_strdup(src_name);
 740     action->dst_name = xbt_strdup(dst_name);
 741   } else {
 742     action->src_name = action->dst_name = NULL;
 743   }
 744 #endif
 745
 746   xbt_dynar_free(&route);
 747   XBT_OUT();
 748
 749   return (surf_action_t) action;
 750 }
 751
 752 static xbt_dynar_t im_net_get_route(const char *src, const char *dst)
 753 {
 754   xbt_dynar_t route=NULL;
 755   routing_get_route_and_latency(src, dst,&route,NULL);
 756   return route;
 757 }
 758
 759 static double im_net_get_link_bandwidth(const void *link)
 760 {
 761   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 762   return lmm->power.peak * lmm->power.scale;
 763 }
 764
 765 static double im_net_get_link_latency(const void *link)
 766 {
 767   return ((link_CM02_im_t) link)->lat_current;
 768 }
 769
 770 static int im_net_link_shared(const void *link)
 771 {
 772   return
 773       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 774 }
 775
 776 static void im_net_action_suspend(surf_action_t action)
 777 {
 778   ((surf_action_network_CM02_im_t) action)->suspended = 1;
 779   lmm_update_variable_weight(network_im_maxmin_system,
 780                              ((surf_action_network_CM02_im_t)
 781                               action)->variable, 0.0);
 782
 783   // remove action from the heap
 784   heap_remove((surf_action_network_CM02_im_t) action);
 785 }
 786
 787 static void im_net_action_resume(surf_action_t action)
 788 {
 789   if (((surf_action_network_CM02_im_t) action)->suspended) {
 790     lmm_update_variable_weight(network_im_maxmin_system,
 791                                ((surf_action_network_CM02_im_t)
 792                                 action)->variable,
 793                                ((surf_action_network_CM02_im_t)
 794                                 action)->weight);
 795     ((surf_action_network_CM02_im_t) action)->suspended = 0;
 796     // remove action from the heap
 797     heap_remove((surf_action_network_CM02_im_t) action);
 798   }
 799 }
 800
 801 static int im_net_action_is_suspended(surf_action_t action)
 802 {
 803   return ((surf_action_network_CM02_im_t) action)->suspended;
 804 }
 805
 806 static void im_net_action_set_max_duration(surf_action_t action, double duration)
 807 {
 808   action->max_duration = duration;
 809   // remove action from the heap
 810   heap_remove((surf_action_network_CM02_im_t) action);
 811 }
 812
 813
 814 static void im_net_finalize(void)
 815 {
 816   surf_model_exit(surf_network_model);
 817   surf_network_model = NULL;
 818
 819   lmm_system_free(network_im_maxmin_system);
 820   network_im_maxmin_system = NULL;
 821
 822   xbt_heap_free(im_net_action_heap);
 823   xbt_swag_free(im_net_modified_set);
 824
 825 }
 826
 827 static void im_surf_network_model_init_internal(void)
 828 {
 829   s_surf_action_network_CM02_im_t comm;
 830
 831   surf_network_model = surf_model_init();
 832
 833   surf_network_model->name = "network";
 834   surf_network_model->action_unref = im_net_action_unref;
 835   surf_network_model->action_cancel = im_net_action_cancel;
 836   surf_network_model->action_recycle = im_net_action_recycle;
 837   surf_network_model->get_remains = im_net_action_get_remains;
 838 #ifdef HAVE_LATENCY_BOUND_TRACKING
 839   surf_network_model->get_latency_limited = im_net_get_link_latency_limited;
 840 #endif
 841
 842   surf_network_model->model_private->resource_used = im_net_resource_used;
 843   surf_network_model->model_private->share_resources = im_net_share_resources;
 844   surf_network_model->model_private->update_actions_state =
 845                   im_net_update_actions_state;
 846   surf_network_model->model_private->update_resource_state =
 847                   im_net_update_resource_state;
 848   surf_network_model->model_private->finalize = im_net_finalize;
 849
 850   surf_network_model->suspend = im_net_action_suspend;
 851   surf_network_model->resume = im_net_action_resume;
 852   surf_network_model->is_suspended = im_net_action_is_suspended;
 853   surf_cpu_model->set_max_duration = im_net_action_set_max_duration;
 854
 855   surf_network_model->extension.network.communicate = im_net_communicate;
 856   surf_network_model->extension.network.get_route = im_net_get_route;
 857   surf_network_model->extension.network.get_link_bandwidth =
 858                   im_net_get_link_bandwidth;
 859   surf_network_model->extension.network.get_link_latency =
 860                   im_net_get_link_latency;
 861   surf_network_model->extension.network.link_shared = im_net_link_shared;
 862   surf_network_model->extension.network.add_traces = im_net_add_traces;
 863   surf_network_model->extension.network.create_resource =
 864                   im_net_create_resource;
 865
 866
 867   if (!network_im_maxmin_system){
 868         sg_maxmin_selective_update = 1;
 869     network_im_maxmin_system = lmm_system_new();
 870   }
 871   im_net_action_heap = xbt_heap_new(8,NULL);
 872
 873   xbt_heap_set_update_callback(im_net_action_heap, im_net_action_update_index_heap);
 874
 875   routing_model_create(sizeof(link_CM02_im_t),
 876       im_net_create_resource("__loopback__",
 877           498000000, NULL, 0.000015, NULL,
 878           SURF_RESOURCE_ON, NULL,
 879           SURF_LINK_FATPIPE, NULL));
 880   im_net_modified_set =
 881       xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
 882 }
 883
 884
 885
 886 /************************************************************************/
 887 /* New model based on optimizations discussed during this thesis        */
 888 /************************************************************************/
 889 void im_surf_network_model_init_LegrandVelho(void)
 890 {
 891
 892   if (surf_network_model)
 893     return;
 894   im_surf_network_model_init_internal();
 895   im_net_define_callbacks();
 896   xbt_dynar_push(model_list, &surf_network_model);
 897   network_im_solve = lmm_solve;
 898
 899   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 900   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 901                             0.92);
 902   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 903 }
 904
 905
 906