src/surf/network.c

   1 /* Copyright (c) 2004-2011. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "network_private.h"
   8 #include "xbt/log.h"
   9 #include "xbt/str.h"
  10
  11 #include "surf/surfxml_parse_values.h"
  12 #include "surf/surf_resource.h"
  13 #include "surf/surf_resource_lmm.h"
  14
  15
  16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  17                                 "Logging specific to the SURF network module");
  18
  19 surf_model_t surf_network_model = NULL;
  20 static lmm_system_t network_maxmin_system = NULL;
  21 static void (*network_solve) (lmm_system_t) = NULL;
  22
  23 double sg_sender_gap = 0.0;
  24 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  25 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  26 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  27
  28 double sg_tcp_gamma = 0.0;
  29 int sg_network_fullduplex = 0;
  30
  31 xbt_dict_t gap_lookup = NULL;
  32
  33 static double net_get_link_bandwidth(const void *link);
  34
  35 static void gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
  36    const char* src = link->lmm_resource.generic_resource.name;
  37    xbt_fifo_t fifo;
  38    surf_action_network_CM02_t last_action;
  39    double bw;
  40
  41    if(sg_sender_gap > 0.0) {
  42       if(!gap_lookup) {
  43          gap_lookup = xbt_dict_new();
  44       }
  45       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
  46       action->sender.gap = 0.0;
  47       if(fifo && xbt_fifo_size(fifo) > 0) {
  48          /* Compute gap from last send */
  49          last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
  50          bw = net_get_link_bandwidth(link);
  51          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
  52          action->latency += action->sender.gap;
  53       }
  54       /* Append action as last send */
  55       action->sender.link_name = link->lmm_resource.generic_resource.name;
  56       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
  57       if(!fifo) {
  58          fifo = xbt_fifo_new();
  59          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
  60       }
  61       action->sender.fifo_item = xbt_fifo_push(fifo, action);
  62       action->sender.size = size;
  63    }
  64 }
  65
  66 static void gap_unknown(surf_action_network_CM02_t action) {
  67    action->sender.gap = 0.0;
  68    action->sender.link_name = NULL;
  69    action->sender.fifo_item = NULL;
  70    action->sender.size = 0.0;
  71 }
  72
  73 static void gap_remove(surf_action_network_CM02_t action) {
  74    xbt_fifo_t fifo;
  75    size_t size;
  76
  77    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
  78       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
  79       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
  80       size = xbt_fifo_size(fifo);
  81       if(size == 0) {
  82          xbt_fifo_free(fifo);
  83          xbt_dict_remove(gap_lookup, action->sender.link_name);
  84          size = xbt_dict_size(gap_lookup);
  85          if(size == 0) {
  86             xbt_dict_free(&gap_lookup);
  87          }
  88       }
  89    }
  90 }
  91
  92 /******************************************************************************/
  93 /*                           Factors callbacks                                */
  94 /******************************************************************************/
  95 static double constant_latency_factor(double size)
  96 {
  97   return sg_latency_factor;
  98 }
  99
 100 static double constant_bandwidth_factor(double size)
 101 {
 102   return sg_bandwidth_factor;
 103 }
 104
 105 static double constant_bandwidth_constraint(double rate, double bound,
 106                                             double size)
 107 {
 108   return rate;
 109 }
 110
 111 /**********************/
 112 /*   SMPI callbacks   */
 113 /**********************/
 114 static double smpi_latency_factor(double size)
 115 {
 116   /* 1 B <= size <= 1 KiB */
 117   if (size <= 1024.0) {
 118     return 1.0056;
 119   }
 120
 121   /* 2 KiB <= size <= 32 KiB */
 122   if (size <= 32768.0) {
 123     return 1.8805;
 124   }
 125
 126   /* 64 KiB <= size <= 4 MiB */
 127   return 22.7111;
 128 }
 129
 130 static double smpi_bandwidth_factor(double size)
 131 {
 132   /* 1 B <= size <= 1 KiB */
 133   if (size <= 1024.0) {
 134     return 0.2758;
 135   }
 136
 137   /* 2 KiB <= size <= 32 KiB */
 138   if (size <= 32768.0) {
 139     return 0.5477;
 140   }
 141
 142   /* 64 KiB <= size <= 4 MiB */
 143   return 0.9359;
 144 }
 145
 146 static double smpi_bandwidth_constraint(double rate, double bound,
 147                                         double size)
 148 {
 149   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 150 }
 151
 152
 153 static double (*latency_factor_callback) (double) =
 154     &constant_latency_factor;
 155 static double (*bandwidth_factor_callback) (double) =
 156     &constant_bandwidth_factor;
 157 static double (*bandwidth_constraint_callback) (double, double, double) =
 158     &constant_bandwidth_constraint;
 159
 160
 161 static void* net_create_resource(const char *name,
 162                                 double bw_initial,
 163                                 tmgr_trace_t bw_trace,
 164                                 double lat_initial,
 165                                 tmgr_trace_t lat_trace,
 166                                 e_surf_resource_state_t
 167                                 state_initial,
 168                                 tmgr_trace_t state_trace,
 169                                 e_surf_link_sharing_policy_t
 170                                 policy, xbt_dict_t properties)
 171 {
 172   link_CM02_t nw_link = (link_CM02_t)
 173       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 174                             surf_network_model, name, properties,
 175                             network_maxmin_system,
 176                             sg_bandwidth_factor * bw_initial,
 177                             history,
 178                             state_initial, state_trace,
 179                             bw_initial, bw_trace);
 180
 181   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 182               "Link '%s' declared several times in the platform file.",
 183               name);
 184
 185   nw_link->lat_current = lat_initial;
 186   if (lat_trace)
 187     nw_link->lat_event =
 188         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 189
 190   if (policy == SURF_LINK_FATPIPE)
 191     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 192
 193   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 194
 195   return nw_link;
 196 }
 197
 198 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 199 {
 200   XBT_DEBUG("link_CM02");
 201
 202   if(link->policy == SURF_LINK_FULLDUPLEX)
 203   {
 204     net_create_resource(bprintf("%s_UP",link->id), link->bandwidth, link->bandwidth_trace,
 205                        link->latency, link->latency_trace, link->state, link->state_trace,
 206                        link->policy, link->properties);
 207     net_create_resource(bprintf("%s_DOWN",link->id), link->bandwidth, link->bandwidth_trace,
 208             link->latency, link->latency_trace, link->state, link->state_trace,
 209             link->policy, NULL); // FIXME: We need to deep copy the properties or we won't be able to free it
 210   }
 211   else
 212   {
 213     net_create_resource(xbt_strdup(link->id), link->bandwidth, link->bandwidth_trace,
 214                 link->latency, link->latency_trace, link->state, link->state_trace,
 215                        link->policy, link->properties);
 216   }
 217
 218 }
 219
 220 static void net_add_traces(void)
 221 {
 222   xbt_dict_cursor_t cursor = NULL;
 223   char *trace_name, *elm;
 224
 225   static int called = 0;
 226   if (called)
 227     return;
 228   called = 1;
 229
 230   /* connect all traces relative to network */
 231   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 232     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 233     link_CM02_t link =
 234         xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 235
 236     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 237                 trace_name, elm);
 238     xbt_assert(trace,
 239                 "Cannot connect trace %s to link %s: trace undefined",
 240                 trace_name, elm);
 241
 242     link->lmm_resource.state_event =
 243         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 244   }
 245
 246   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 247     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 248     link_CM02_t link =
 249                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 250
 251     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 252                 trace_name, elm);
 253     xbt_assert(trace,
 254                 "Cannot connect trace %s to link %s: trace undefined",
 255                 trace_name, elm);
 256
 257     link->lmm_resource.power.event =
 258         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 259   }
 260
 261   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 262     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 263     link_CM02_t link =
 264                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 265
 266     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 267                 trace_name, elm);
 268     xbt_assert(trace,
 269                 "Cannot connect trace %s to link %s: trace undefined",
 270                 trace_name, elm);
 271
 272     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 273   }
 274 }
 275
 276 static void net_define_callbacks(void)
 277 {
 278   /* Figuring out the network links */
 279   sg_platf_link_add_cb(net_parse_link_init);
 280   sg_platf_postparse_add_cb(net_add_traces);
 281 }
 282
 283 static int net_resource_used(void *resource_id)
 284 {
 285   return lmm_constraint_used(network_maxmin_system,
 286                              ((surf_resource_lmm_t)
 287                               resource_id)->constraint);
 288 }
 289
 290 static int net_action_unref(surf_action_t action)
 291 {
 292   action->refcount--;
 293   if (!action->refcount) {
 294     xbt_swag_remove(action, action->state_set);
 295     if (((surf_action_network_CM02_t) action)->variable)
 296       lmm_variable_free(network_maxmin_system,
 297                         ((surf_action_network_CM02_t) action)->variable);
 298 #ifdef HAVE_TRACING
 299     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 300     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 301     if (action->category)
 302       xbt_free(action->category);
 303 #endif
 304     surf_action_free(&action);
 305     return 1;
 306   }
 307   return 0;
 308 }
 309
 310 static void net_action_cancel(surf_action_t action)
 311 {
 312   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 313 }
 314
 315 void net_action_recycle(surf_action_t action)
 316 {
 317   return;
 318 }
 319
 320 #ifdef HAVE_LATENCY_BOUND_TRACKING
 321 int net_get_link_latency_limited(surf_action_t action)
 322 {
 323   return action->latency_limited;
 324 }
 325 #endif
 326
 327 double net_action_get_remains(surf_action_t action)
 328 {
 329   return action->remains;
 330 }
 331
 332 static double net_share_resources(double now)
 333 {
 334   s_surf_action_network_CM02_t s_action;
 335   surf_action_network_CM02_t action = NULL;
 336   xbt_swag_t running_actions =
 337       surf_network_model->states.running_action_set;
 338   double min;
 339
 340   min = generic_maxmin_share_resources(running_actions,
 341                                        xbt_swag_offset(s_action,
 342                                                        variable),
 343                                        network_maxmin_system,
 344                                        network_solve);
 345
 346 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 347
 348   xbt_swag_foreach(action, running_actions) {
 349 #ifdef HAVE_LATENCY_BOUND_TRACKING
 350     if (lmm_is_variable_limited_by_latency(action->variable)) {
 351       (action->generic_action).latency_limited = 1;
 352     } else {
 353       (action->generic_action).latency_limited = 0;
 354     }
 355 #endif
 356     if (action->latency > 0) {
 357       if (min < 0)
 358         min = action->latency;
 359       else if (action->latency < min)
 360         min = action->latency;
 361     }
 362   }
 363
 364   XBT_DEBUG("Min of share resources %f", min);
 365
 366   return min;
 367 }
 368
 369 static void net_update_actions_state(double now, double delta)
 370 {
 371   double deltap = 0.0;
 372   surf_action_network_CM02_t action = NULL;
 373   surf_action_network_CM02_t next_action = NULL;
 374   xbt_swag_t running_actions =
 375       surf_network_model->states.running_action_set;
 376   /*
 377      xbt_swag_t failed_actions =
 378      surf_network_model->states.failed_action_set;
 379    */
 380
 381   xbt_swag_foreach_safe(action, next_action, running_actions) {
 382     deltap = delta;
 383     if (action->latency > 0) {
 384       if (action->latency > deltap) {
 385         double_update(&(action->latency), deltap);
 386         deltap = 0.0;
 387       } else {
 388         double_update(&(deltap), action->latency);
 389         action->latency = 0.0;
 390       }
 391       if ((action->latency == 0.0) && !(action->suspended))
 392         lmm_update_variable_weight(network_maxmin_system, action->variable,
 393                                    action->weight);
 394     }
 395 #ifdef HAVE_TRACING
 396     if (TRACE_is_enabled()) {
 397       xbt_dynar_t route = global_routing->get_route(action->src_name,
 398                                                     action->dst_name);
 399       link_CM02_t link;
 400       unsigned int i;
 401       xbt_dynar_foreach(route, i, link) {
 402         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 403                                         action->generic_action.data,
 404                                         (surf_action_t) action,
 405                                         lmm_variable_getvalue
 406                                         (action->variable), now - delta,
 407                                         delta);
 408       }
 409     }
 410 #endif
 411     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 412                                 /* There is actually no link used, hence an infinite bandwidth.
 413                                  * This happens often when using models like vivaldi.
 414                                  * In such case, just make sure that the action completes immediately.
 415                                  */
 416         double_update(&(action->generic_action.remains),
 417                         action->generic_action.remains);
 418     }
 419     double_update(&(action->generic_action.remains),
 420                   lmm_variable_getvalue(action->variable) * deltap);
 421     if (action->generic_action.max_duration != NO_MAX_DURATION)
 422       double_update(&(action->generic_action.max_duration), delta);
 423
 424     if ((action->generic_action.remains <= 0) &&
 425         (lmm_get_variable_weight(action->variable) > 0)) {
 426       action->generic_action.finish = surf_get_clock();
 427       surf_network_model->action_state_set((surf_action_t) action,
 428                                            SURF_ACTION_DONE);
 429       gap_remove(action);
 430     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 431                && (action->generic_action.max_duration <= 0)) {
 432       action->generic_action.finish = surf_get_clock();
 433       surf_network_model->action_state_set((surf_action_t) action,
 434                                            SURF_ACTION_DONE);
 435       gap_remove(action);
 436     }
 437   }
 438
 439   return;
 440 }
 441
 442 static void net_update_resource_state(void *id,
 443                                       tmgr_trace_event_t event_type,
 444                                       double value, double date)
 445 {
 446   link_CM02_t nw_link = id;
 447   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 448   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 449   /*     value, event_type); */
 450
 451   if (event_type == nw_link->lmm_resource.power.event) {
 452     double delta =
 453         sg_weight_S_parameter / value - sg_weight_S_parameter /
 454         (nw_link->lmm_resource.power.peak *
 455          nw_link->lmm_resource.power.scale);
 456     lmm_variable_t var = NULL;
 457     lmm_element_t elem = NULL;
 458     surf_action_network_CM02_t action = NULL;
 459
 460     nw_link->lmm_resource.power.peak = value;
 461     lmm_update_constraint_bound(network_maxmin_system,
 462                                 nw_link->lmm_resource.constraint,
 463                                 sg_bandwidth_factor *
 464                                 (nw_link->lmm_resource.power.peak *
 465                                  nw_link->lmm_resource.power.scale));
 466 #ifdef HAVE_TRACING
 467     TRACE_surf_link_set_bandwidth(date, nw_link->lmm_resource.generic_resource.name,
 468                                   sg_bandwidth_factor *
 469                                   (nw_link->lmm_resource.power.peak *
 470                                    nw_link->lmm_resource.power.scale));
 471 #endif
 472     if (sg_weight_S_parameter > 0) {
 473       while ((var = lmm_get_var_from_cnst
 474               (network_maxmin_system, nw_link->lmm_resource.constraint,
 475                &elem))) {
 476         action = lmm_variable_id(var);
 477         action->weight += delta;
 478         if (!(action->suspended))
 479           lmm_update_variable_weight(network_maxmin_system,
 480                                      action->variable, action->weight);
 481       }
 482     }
 483     if (tmgr_trace_event_free(event_type))
 484       nw_link->lmm_resource.power.event = NULL;
 485   } else if (event_type == nw_link->lat_event) {
 486     double delta = value - nw_link->lat_current;
 487     lmm_variable_t var = NULL;
 488     lmm_element_t elem = NULL;
 489     surf_action_network_CM02_t action = NULL;
 490
 491     nw_link->lat_current = value;
 492     while ((var = lmm_get_var_from_cnst
 493             (network_maxmin_system, nw_link->lmm_resource.constraint,
 494              &elem))) {
 495       action = lmm_variable_id(var);
 496       action->lat_current += delta;
 497       action->weight += delta;
 498       if (action->rate < 0)
 499         lmm_update_variable_bound(network_maxmin_system, action->variable,
 500                                   sg_tcp_gamma / (2.0 *
 501                                                   action->lat_current));
 502       else {
 503         lmm_update_variable_bound(network_maxmin_system, action->variable,
 504                                   min(action->rate,
 505                                       sg_tcp_gamma / (2.0 *
 506                                                       action->lat_current)));
 507
 508         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 509           XBT_INFO("Flow is limited BYBANDWIDTH");
 510         } else {
 511           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 512                 action->lat_current);
 513         }
 514       }
 515       if (!(action->suspended))
 516         lmm_update_variable_weight(network_maxmin_system, action->variable,
 517                                    action->weight);
 518
 519     }
 520     if (tmgr_trace_event_free(event_type))
 521       nw_link->lat_event = NULL;
 522   } else if (event_type == nw_link->lmm_resource.state_event) {
 523     if (value > 0)
 524       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 525     else {
 526       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 527       lmm_variable_t var = NULL;
 528       lmm_element_t elem = NULL;
 529
 530       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 531       while ((var = lmm_get_var_from_cnst
 532               (network_maxmin_system, cnst, &elem))) {
 533         surf_action_t action = lmm_variable_id(var);
 534
 535         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 536             surf_action_state_get(action) == SURF_ACTION_READY) {
 537           action->finish = date;
 538           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 539         }
 540       }
 541     }
 542     if (tmgr_trace_event_free(event_type))
 543       nw_link->lmm_resource.state_event = NULL;
 544   } else {
 545     XBT_CRITICAL("Unknown event ! \n");
 546     xbt_abort();
 547   }
 548
 549   return;
 550 }
 551
 552
 553 static surf_action_t net_communicate(const char *src_name,
 554                                      const char *dst_name, double size,
 555                                      double rate)
 556 {
 557   unsigned int i;
 558   link_CM02_t link;
 559   int failed = 0;
 560   surf_action_network_CM02_t action = NULL;
 561   double bandwidth_bound;
 562   double latency=0.0;
 563   /* LARGE PLATFORMS HACK:
 564      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 565      Use the cluster_id for ->id */
 566
 567   xbt_dynar_t back_route = NULL;
 568   int constraints_per_variable = 0;
 569   xbt_dynar_t route;
 570   // I will need this route for some time so require for no cleanup
 571   global_routing->get_route_latency(src_name, dst_name, &route, &latency, 0);
 572
 573   if (sg_network_fullduplex == 1) {
 574     back_route = global_routing->get_route(dst_name, src_name);
 575   }
 576
 577   /* LARGE PLATFORMS HACK:
 578      total_route_size = route_size + src->link_nb + dst->nb */
 579
 580   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 581   /* LARGE PLATFORMS HACK:
 582      assert on total_route_size */
 583   xbt_assert(xbt_dynar_length(route) || latency,
 584               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 585               src_name, dst_name);
 586
 587   xbt_dynar_foreach(route, i, link) {
 588     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 589       failed = 1;
 590       break;
 591     }
 592   }
 593   action =
 594       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 595                       surf_network_model, failed);
 596 #ifdef HAVE_LATENCY_BOUND_TRACKING
 597   (action->generic_action).latency_limited = 0;
 598 #endif
 599   action->weight = action->latency = latency;
 600
 601   xbt_swag_insert(action, action->generic_action.state_set);
 602   action->rate = rate;
 603
 604   bandwidth_bound = -1.0;
 605
 606   xbt_dynar_foreach(route, i, link) {
 607     action->weight +=
 608         sg_weight_S_parameter /
 609         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 610     if (bandwidth_bound < 0.0)
 611       bandwidth_bound =
 612           (*bandwidth_factor_callback) (size) *
 613           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 614     else
 615       bandwidth_bound =
 616           min(bandwidth_bound,
 617               (*bandwidth_factor_callback) (size) *
 618               (link->lmm_resource.power.peak *
 619                link->lmm_resource.power.scale));
 620   }
 621   /* LARGE PLATFORMS HACK:
 622      Add src->link and dst->link latencies */
 623   action->lat_current = action->latency;
 624   action->latency *= (*latency_factor_callback) (size);
 625   action->rate =
 626       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 627                                         size);
 628
 629   if(xbt_dynar_length(route) > 0) {
 630     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 631     gap_append(size, link, action);
 632     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 633            action, src_name, dst_name, action->sender.gap, action->latency);
 634   } else {
 635     gap_unknown(action);
 636   }
 637
 638
 639   /* LARGE PLATFORMS HACK:
 640      lmm_variable_new(..., total_route_size) */
 641   if (back_route != NULL) {
 642     constraints_per_variable =
 643         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 644   } else {
 645     constraints_per_variable = xbt_dynar_length(route);
 646   }
 647
 648   if (action->latency > 0)
 649     action->variable =
 650         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 651                          constraints_per_variable);
 652   else
 653     action->variable =
 654         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 655                          constraints_per_variable);
 656
 657   if (action->rate < 0) {
 658     if (action->lat_current > 0)
 659       lmm_update_variable_bound(network_maxmin_system, action->variable,
 660                                 sg_tcp_gamma / (2.0 *
 661                                                 action->lat_current));
 662     else
 663       lmm_update_variable_bound(network_maxmin_system, action->variable,
 664                                 -1.0);
 665   } else {
 666     if (action->lat_current > 0)
 667       lmm_update_variable_bound(network_maxmin_system, action->variable,
 668                                 min(action->rate,
 669                                     sg_tcp_gamma / (2.0 *
 670                                                     action->lat_current)));
 671     else
 672       lmm_update_variable_bound(network_maxmin_system, action->variable,
 673                                 action->rate);
 674   }
 675
 676   xbt_dynar_foreach(route, i, link) {
 677     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 678                action->variable, 1.0);
 679   }
 680
 681   if (sg_network_fullduplex == 1) {
 682     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 683     xbt_dynar_foreach(back_route, i, link) {
 684       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 685                  action->variable, .05);
 686     }
 687   }
 688   /* LARGE PLATFORMS HACK:
 689      expand also with src->link and dst->link */
 690 #ifdef HAVE_TRACING
 691   if (TRACE_is_enabled()) {
 692     action->src_name = xbt_strdup(src_name);
 693     action->dst_name = xbt_strdup(dst_name);
 694   } else {
 695     action->src_name = action->dst_name = NULL;
 696   }
 697 #endif
 698
 699   xbt_dynar_free(&route);
 700   XBT_OUT();
 701
 702   return (surf_action_t) action;
 703 }
 704
 705 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 706 {
 707   return global_routing->get_route(src, dst);
 708 }
 709
 710 static double net_get_link_bandwidth(const void *link)
 711 {
 712   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 713   return lmm->power.peak * lmm->power.scale;
 714 }
 715
 716 static double net_get_link_latency(const void *link)
 717 {
 718   return ((link_CM02_t) link)->lat_current;
 719 }
 720
 721 static int net_link_shared(const void *link)
 722 {
 723   return
 724       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 725 }
 726
 727 static void net_action_suspend(surf_action_t action)
 728 {
 729   ((surf_action_network_CM02_t) action)->suspended = 1;
 730   lmm_update_variable_weight(network_maxmin_system,
 731                              ((surf_action_network_CM02_t)
 732                               action)->variable, 0.0);
 733 }
 734
 735 static void net_action_resume(surf_action_t action)
 736 {
 737   if (((surf_action_network_CM02_t) action)->suspended) {
 738     lmm_update_variable_weight(network_maxmin_system,
 739                                ((surf_action_network_CM02_t)
 740                                 action)->variable,
 741                                ((surf_action_network_CM02_t)
 742                                 action)->weight);
 743     ((surf_action_network_CM02_t) action)->suspended = 0;
 744   }
 745 }
 746
 747 static int net_action_is_suspended(surf_action_t action)
 748 {
 749   return ((surf_action_network_CM02_t) action)->suspended;
 750 }
 751
 752 void net_action_set_max_duration(surf_action_t action, double duration)
 753 {
 754   action->max_duration = duration;
 755 }
 756
 757 #ifdef HAVE_TRACING
 758 static void net_action_set_category(surf_action_t action, const char *category)
 759 {
 760   action->category = xbt_strdup (category);
 761 }
 762 #endif
 763
 764 static void net_finalize(void)
 765 {
 766   surf_model_exit(surf_network_model);
 767   surf_network_model = NULL;
 768
 769   global_routing->finalize();
 770
 771   lmm_system_free(network_maxmin_system);
 772   network_maxmin_system = NULL;
 773 }
 774
 775 static void surf_network_model_init_internal(void)
 776 {
 777   surf_network_model = surf_model_init();
 778
 779   surf_network_model->name = "network";
 780   surf_network_model->action_unref = net_action_unref;
 781   surf_network_model->action_cancel = net_action_cancel;
 782   surf_network_model->action_recycle = net_action_recycle;
 783   surf_network_model->get_remains = net_action_get_remains;
 784 #ifdef HAVE_LATENCY_BOUND_TRACKING
 785   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 786 #endif
 787
 788   surf_network_model->model_private->resource_used = net_resource_used;
 789   surf_network_model->model_private->share_resources = net_share_resources;
 790   surf_network_model->model_private->update_actions_state =
 791       net_update_actions_state;
 792   surf_network_model->model_private->update_resource_state =
 793       net_update_resource_state;
 794   surf_network_model->model_private->finalize = net_finalize;
 795
 796   surf_network_model->suspend = net_action_suspend;
 797   surf_network_model->resume = net_action_resume;
 798   surf_network_model->is_suspended = net_action_is_suspended;
 799   surf_network_model->set_max_duration = net_action_set_max_duration;
 800 #ifdef HAVE_TRACING
 801   surf_network_model->set_category = net_action_set_category;
 802 #endif
 803
 804   surf_network_model->extension.network.communicate = net_communicate;
 805   surf_network_model->extension.network.get_route = net_get_route;
 806   surf_network_model->extension.network.get_link_bandwidth =
 807       net_get_link_bandwidth;
 808   surf_network_model->extension.network.get_link_latency =
 809       net_get_link_latency;
 810   surf_network_model->extension.network.link_shared = net_link_shared;
 811   surf_network_model->extension.network.add_traces = net_add_traces;
 812   surf_network_model->extension.network.create_resource =
 813       net_create_resource;
 814
 815   if (!network_maxmin_system)
 816     network_maxmin_system = lmm_system_new();
 817
 818   routing_model_create(sizeof(link_CM02_t),
 819       net_create_resource(xbt_strdup("__loopback__"),
 820           498000000, NULL, 0.000015, NULL,
 821             SURF_RESOURCE_ON, NULL,
 822             SURF_LINK_FATPIPE, NULL),
 823             net_get_link_latency);
 824 }
 825
 826
 827
 828 /************************************************************************/
 829 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 830 /************************************************************************/
 831 void surf_network_model_init_SMPI(void)
 832 {
 833
 834   if (surf_network_model)
 835     return;
 836   surf_network_model_init_internal();
 837   latency_factor_callback = &smpi_latency_factor;
 838   bandwidth_factor_callback = &smpi_bandwidth_factor;
 839   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 840   net_define_callbacks();
 841   xbt_dynar_push(model_list, &surf_network_model);
 842   network_solve = lmm_solve;
 843
 844   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
 845   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 846
 847   update_model_description(surf_network_model_description,
 848                            "SMPI", surf_network_model);
 849 }
 850
 851 /************************************************************************/
 852 /* New model based on optimizations discussed during this thesis        */
 853 /************************************************************************/
 854 void surf_network_model_init_LegrandVelho(void)
 855 {
 856
 857   if (surf_network_model)
 858     return;
 859   surf_network_model_init_internal();
 860   net_define_callbacks();
 861   xbt_dynar_push(model_list, &surf_network_model);
 862   network_solve = lmm_solve;
 863
 864   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 865   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 866                             0.92);
 867   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 868
 869   update_model_description(surf_network_model_description,
 870                            "LV08_fullupdate", surf_network_model);
 871 }
 872
 873 /***************************************************************************/
 874 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 875 /***************************************************************************/
 876 /* @TechReport{      rr-lip2002-40, */
 877 /*   author        = {Henri Casanova and Loris Marchal}, */
 878 /*   institution   = {LIP}, */
 879 /*   title         = {A Network Model for Simulation of Grid Application}, */
 880 /*   number        = {2002-40}, */
 881 /*   month         = {oct}, */
 882 /*   year          = {2002} */
 883 /* } */
 884 void surf_network_model_init_CM02(void)
 885 {
 886
 887   if (surf_network_model)
 888     return;
 889   surf_network_model_init_internal();
 890   net_define_callbacks();
 891   xbt_dynar_push(model_list, &surf_network_model);
 892   network_solve = lmm_solve;
 893
 894   update_model_description(surf_network_model_description,
 895                            "CM02", surf_network_model);
 896 }
 897
 898 void surf_network_model_init_Reno(void)
 899 {
 900   if (surf_network_model)
 901     return;
 902   surf_network_model_init_internal();
 903   net_define_callbacks();
 904
 905   xbt_dynar_push(model_list, &surf_network_model);
 906   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 907                                     func_reno_fpi);
 908   network_solve = lagrange_solve;
 909
 910   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 911   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 912                             0.92);
 913   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 914
 915   update_model_description(surf_network_model_description,
 916                            "Reno", surf_network_model);
 917 }
 918
 919
 920 void surf_network_model_init_Reno2(void)
 921 {
 922   if (surf_network_model)
 923     return;
 924   surf_network_model_init_internal();
 925   net_define_callbacks();
 926
 927   xbt_dynar_push(model_list, &surf_network_model);
 928   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 929                                     func_reno2_fpi);
 930   network_solve = lagrange_solve;
 931
 932   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 933   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 934                             0.92);
 935   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
 936                             8775);
 937
 938   update_model_description(surf_network_model_description,
 939                            "Reno2", surf_network_model);
 940 }
 941
 942 void surf_network_model_init_Vegas(void)
 943 {
 944   if (surf_network_model)
 945     return;
 946   surf_network_model_init_internal();
 947   net_define_callbacks();
 948
 949   xbt_dynar_push(model_list, &surf_network_model);
 950   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 951                                     func_vegas_fpi);
 952   network_solve = lagrange_solve;
 953
 954   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 955   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 956                             0.92);
 957   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 958
 959   update_model_description(surf_network_model_description,
 960                            "Vegas", surf_network_model);
 961 }