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