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     char *link_id;
 204     link_id = bprintf("%s_UP", link->id);
 205     net_create_resource(link_id,
 206                         link->bandwidth,
 207                         link->bandwidth_trace,
 208                         link->latency,
 209                         link->latency_trace,
 210                         link->state,
 211                         link->state_trace,
 212                         link->policy,
 213                         link->properties);
 214     xbt_free(link_id);
 215     link_id = bprintf("%s_DOWN", link->id);
 216     net_create_resource(link_id,
 217                         link->bandwidth,
 218                         link->bandwidth_trace,
 219                         link->latency,
 220                         link->latency_trace,
 221                         link->state,
 222                         link->state_trace,
 223                         link->policy,
 224                         NULL); /* FIXME: We need to deep copy the properties or
 225                                 * we won't be able to free it */
 226     xbt_free(link_id);
 227   } else {
 228     net_create_resource(link->id,
 229                         link->bandwidth,
 230                         link->bandwidth_trace,
 231                         link->latency,
 232                         link->latency_trace,
 233                         link->state,
 234                         link->state_trace,
 235                         link->policy,
 236                         link->properties);
 237   }
 238 }
 239
 240 static void net_add_traces(void)
 241 {
 242   xbt_dict_cursor_t cursor = NULL;
 243   char *trace_name, *elm;
 244
 245   static int called = 0;
 246   if (called)
 247     return;
 248   called = 1;
 249
 250   /* connect all traces relative to network */
 251   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 252     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 253     link_CM02_t link =
 254         xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 255
 256     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 257                 trace_name, elm);
 258     xbt_assert(trace,
 259                 "Cannot connect trace %s to link %s: trace undefined",
 260                 trace_name, elm);
 261
 262     link->lmm_resource.state_event =
 263         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 264   }
 265
 266   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 267     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 268     link_CM02_t link =
 269                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 270
 271     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 272                 trace_name, elm);
 273     xbt_assert(trace,
 274                 "Cannot connect trace %s to link %s: trace undefined",
 275                 trace_name, elm);
 276
 277     link->lmm_resource.power.event =
 278         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 279   }
 280
 281   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 282     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 283     link_CM02_t link =
 284                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 285
 286     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 287                 trace_name, elm);
 288     xbt_assert(trace,
 289                 "Cannot connect trace %s to link %s: trace undefined",
 290                 trace_name, elm);
 291
 292     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 293   }
 294 }
 295
 296 static void net_define_callbacks(void)
 297 {
 298   /* Figuring out the network links */
 299   sg_platf_link_add_cb(net_parse_link_init);
 300   sg_platf_postparse_add_cb(net_add_traces);
 301 }
 302
 303 static int net_resource_used(void *resource_id)
 304 {
 305   return lmm_constraint_used(network_maxmin_system,
 306                              ((surf_resource_lmm_t)
 307                               resource_id)->constraint);
 308 }
 309
 310 static int net_action_unref(surf_action_t action)
 311 {
 312   action->refcount--;
 313   if (!action->refcount) {
 314     xbt_swag_remove(action, action->state_set);
 315     if (((surf_action_network_CM02_t) action)->variable)
 316       lmm_variable_free(network_maxmin_system,
 317                         ((surf_action_network_CM02_t) action)->variable);
 318 #ifdef HAVE_TRACING
 319     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 320     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 321     if (action->category)
 322       xbt_free(action->category);
 323 #endif
 324     surf_action_free(&action);
 325     return 1;
 326   }
 327   return 0;
 328 }
 329
 330 static void net_action_cancel(surf_action_t action)
 331 {
 332   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 333 }
 334
 335 void net_action_recycle(surf_action_t action)
 336 {
 337   return;
 338 }
 339
 340 #ifdef HAVE_LATENCY_BOUND_TRACKING
 341 int net_get_link_latency_limited(surf_action_t action)
 342 {
 343   return action->latency_limited;
 344 }
 345 #endif
 346
 347 double net_action_get_remains(surf_action_t action)
 348 {
 349   return action->remains;
 350 }
 351
 352 static double net_share_resources(double now)
 353 {
 354   s_surf_action_network_CM02_t s_action;
 355   surf_action_network_CM02_t action = NULL;
 356   xbt_swag_t running_actions =
 357       surf_network_model->states.running_action_set;
 358   double min;
 359
 360   min = generic_maxmin_share_resources(running_actions,
 361                                        xbt_swag_offset(s_action,
 362                                                        variable),
 363                                        network_maxmin_system,
 364                                        network_solve);
 365
 366 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 367
 368   xbt_swag_foreach(action, running_actions) {
 369 #ifdef HAVE_LATENCY_BOUND_TRACKING
 370     if (lmm_is_variable_limited_by_latency(action->variable)) {
 371       (action->generic_action).latency_limited = 1;
 372     } else {
 373       (action->generic_action).latency_limited = 0;
 374     }
 375 #endif
 376     if (action->latency > 0) {
 377       if (min < 0)
 378         min = action->latency;
 379       else if (action->latency < min)
 380         min = action->latency;
 381     }
 382   }
 383
 384   XBT_DEBUG("Min of share resources %f", min);
 385
 386   return min;
 387 }
 388
 389 static void net_update_actions_state(double now, double delta)
 390 {
 391   double deltap = 0.0;
 392   surf_action_network_CM02_t action = NULL;
 393   surf_action_network_CM02_t next_action = NULL;
 394   xbt_swag_t running_actions =
 395       surf_network_model->states.running_action_set;
 396   /*
 397      xbt_swag_t failed_actions =
 398      surf_network_model->states.failed_action_set;
 399    */
 400
 401   xbt_swag_foreach_safe(action, next_action, running_actions) {
 402     deltap = delta;
 403     if (action->latency > 0) {
 404       if (action->latency > deltap) {
 405         double_update(&(action->latency), deltap);
 406         deltap = 0.0;
 407       } else {
 408         double_update(&(deltap), action->latency);
 409         action->latency = 0.0;
 410       }
 411       if ((action->latency == 0.0) && !(action->suspended))
 412         lmm_update_variable_weight(network_maxmin_system, action->variable,
 413                                    action->weight);
 414     }
 415 #ifdef HAVE_TRACING
 416     if (TRACE_is_enabled()) {
 417       xbt_dynar_t route = global_routing->get_route(action->src_name,
 418                                                     action->dst_name);
 419       link_CM02_t link;
 420       unsigned int i;
 421       xbt_dynar_foreach(route, i, link) {
 422         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 423                                         action->generic_action.data,
 424                                         (surf_action_t) action,
 425                                         lmm_variable_getvalue
 426                                         (action->variable), now - delta,
 427                                         delta);
 428       }
 429     }
 430 #endif
 431     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 432                                 /* There is actually no link used, hence an infinite bandwidth.
 433                                  * This happens often when using models like vivaldi.
 434                                  * In such case, just make sure that the action completes immediately.
 435                                  */
 436         double_update(&(action->generic_action.remains),
 437                         action->generic_action.remains);
 438     }
 439     double_update(&(action->generic_action.remains),
 440                   lmm_variable_getvalue(action->variable) * deltap);
 441     if (action->generic_action.max_duration != NO_MAX_DURATION)
 442       double_update(&(action->generic_action.max_duration), delta);
 443
 444     if ((action->generic_action.remains <= 0) &&
 445         (lmm_get_variable_weight(action->variable) > 0)) {
 446       action->generic_action.finish = surf_get_clock();
 447       surf_network_model->action_state_set((surf_action_t) action,
 448                                            SURF_ACTION_DONE);
 449       gap_remove(action);
 450     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 451                && (action->generic_action.max_duration <= 0)) {
 452       action->generic_action.finish = surf_get_clock();
 453       surf_network_model->action_state_set((surf_action_t) action,
 454                                            SURF_ACTION_DONE);
 455       gap_remove(action);
 456     }
 457   }
 458
 459   return;
 460 }
 461
 462 static void net_update_resource_state(void *id,
 463                                       tmgr_trace_event_t event_type,
 464                                       double value, double date)
 465 {
 466   link_CM02_t nw_link = id;
 467   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 468   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 469   /*     value, event_type); */
 470
 471   if (event_type == nw_link->lmm_resource.power.event) {
 472     double delta =
 473         sg_weight_S_parameter / value - sg_weight_S_parameter /
 474         (nw_link->lmm_resource.power.peak *
 475          nw_link->lmm_resource.power.scale);
 476     lmm_variable_t var = NULL;
 477     lmm_element_t elem = NULL;
 478     surf_action_network_CM02_t action = NULL;
 479
 480     nw_link->lmm_resource.power.peak = value;
 481     lmm_update_constraint_bound(network_maxmin_system,
 482                                 nw_link->lmm_resource.constraint,
 483                                 sg_bandwidth_factor *
 484                                 (nw_link->lmm_resource.power.peak *
 485                                  nw_link->lmm_resource.power.scale));
 486 #ifdef HAVE_TRACING
 487     TRACE_surf_link_set_bandwidth(date, nw_link->lmm_resource.generic_resource.name,
 488                                   sg_bandwidth_factor *
 489                                   (nw_link->lmm_resource.power.peak *
 490                                    nw_link->lmm_resource.power.scale));
 491 #endif
 492     if (sg_weight_S_parameter > 0) {
 493       while ((var = lmm_get_var_from_cnst
 494               (network_maxmin_system, nw_link->lmm_resource.constraint,
 495                &elem))) {
 496         action = lmm_variable_id(var);
 497         action->weight += delta;
 498         if (!(action->suspended))
 499           lmm_update_variable_weight(network_maxmin_system,
 500                                      action->variable, action->weight);
 501       }
 502     }
 503     if (tmgr_trace_event_free(event_type))
 504       nw_link->lmm_resource.power.event = NULL;
 505   } else if (event_type == nw_link->lat_event) {
 506     double delta = value - nw_link->lat_current;
 507     lmm_variable_t var = NULL;
 508     lmm_element_t elem = NULL;
 509     surf_action_network_CM02_t action = NULL;
 510
 511     nw_link->lat_current = value;
 512     while ((var = lmm_get_var_from_cnst
 513             (network_maxmin_system, nw_link->lmm_resource.constraint,
 514              &elem))) {
 515       action = lmm_variable_id(var);
 516       action->lat_current += delta;
 517       action->weight += delta;
 518       if (action->rate < 0)
 519         lmm_update_variable_bound(network_maxmin_system, action->variable,
 520                                   sg_tcp_gamma / (2.0 *
 521                                                   action->lat_current));
 522       else {
 523         lmm_update_variable_bound(network_maxmin_system, action->variable,
 524                                   min(action->rate,
 525                                       sg_tcp_gamma / (2.0 *
 526                                                       action->lat_current)));
 527
 528         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 529           XBT_INFO("Flow is limited BYBANDWIDTH");
 530         } else {
 531           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 532                 action->lat_current);
 533         }
 534       }
 535       if (!(action->suspended))
 536         lmm_update_variable_weight(network_maxmin_system, action->variable,
 537                                    action->weight);
 538
 539     }
 540     if (tmgr_trace_event_free(event_type))
 541       nw_link->lat_event = NULL;
 542   } else if (event_type == nw_link->lmm_resource.state_event) {
 543     if (value > 0)
 544       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 545     else {
 546       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 547       lmm_variable_t var = NULL;
 548       lmm_element_t elem = NULL;
 549
 550       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 551       while ((var = lmm_get_var_from_cnst
 552               (network_maxmin_system, cnst, &elem))) {
 553         surf_action_t action = lmm_variable_id(var);
 554
 555         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 556             surf_action_state_get(action) == SURF_ACTION_READY) {
 557           action->finish = date;
 558           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 559         }
 560       }
 561     }
 562     if (tmgr_trace_event_free(event_type))
 563       nw_link->lmm_resource.state_event = NULL;
 564   } else {
 565     XBT_CRITICAL("Unknown event ! \n");
 566     xbt_abort();
 567   }
 568
 569   return;
 570 }
 571
 572
 573 static surf_action_t net_communicate(const char *src_name,
 574                                      const char *dst_name, double size,
 575                                      double rate)
 576 {
 577   unsigned int i;
 578   link_CM02_t link;
 579   int failed = 0;
 580   surf_action_network_CM02_t action = NULL;
 581   double bandwidth_bound;
 582   double latency=0.0;
 583   /* LARGE PLATFORMS HACK:
 584      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 585      Use the cluster_id for ->id */
 586
 587   xbt_dynar_t back_route = NULL;
 588   int constraints_per_variable = 0;
 589   xbt_dynar_t route;
 590   // I will need this route for some time so require for no cleanup
 591   global_routing->get_route_latency(src_name, dst_name, &route, &latency, 0);
 592
 593   if (sg_network_fullduplex == 1) {
 594     back_route = global_routing->get_route(dst_name, src_name);
 595   }
 596
 597   /* LARGE PLATFORMS HACK:
 598      total_route_size = route_size + src->link_nb + dst->nb */
 599
 600   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 601   /* LARGE PLATFORMS HACK:
 602      assert on total_route_size */
 603   xbt_assert(xbt_dynar_length(route) || latency,
 604               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 605               src_name, dst_name);
 606
 607   xbt_dynar_foreach(route, i, link) {
 608     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 609       failed = 1;
 610       break;
 611     }
 612   }
 613   action =
 614       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 615                       surf_network_model, failed);
 616 #ifdef HAVE_LATENCY_BOUND_TRACKING
 617   (action->generic_action).latency_limited = 0;
 618 #endif
 619   action->weight = action->latency = latency;
 620
 621   xbt_swag_insert(action, action->generic_action.state_set);
 622   action->rate = rate;
 623
 624   bandwidth_bound = -1.0;
 625
 626   xbt_dynar_foreach(route, i, link) {
 627     action->weight +=
 628         sg_weight_S_parameter /
 629         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 630     if (bandwidth_bound < 0.0)
 631       bandwidth_bound =
 632           (*bandwidth_factor_callback) (size) *
 633           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 634     else
 635       bandwidth_bound =
 636           min(bandwidth_bound,
 637               (*bandwidth_factor_callback) (size) *
 638               (link->lmm_resource.power.peak *
 639                link->lmm_resource.power.scale));
 640   }
 641   /* LARGE PLATFORMS HACK:
 642      Add src->link and dst->link latencies */
 643   action->lat_current = action->latency;
 644   action->latency *= (*latency_factor_callback) (size);
 645   action->rate =
 646       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 647                                         size);
 648
 649   if(xbt_dynar_length(route) > 0) {
 650     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 651     gap_append(size, link, action);
 652     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 653            action, src_name, dst_name, action->sender.gap, action->latency);
 654   } else {
 655     gap_unknown(action);
 656   }
 657
 658
 659   /* LARGE PLATFORMS HACK:
 660      lmm_variable_new(..., total_route_size) */
 661   if (back_route != NULL) {
 662     constraints_per_variable =
 663         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 664   } else {
 665     constraints_per_variable = xbt_dynar_length(route);
 666   }
 667
 668   if (action->latency > 0)
 669     action->variable =
 670         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 671                          constraints_per_variable);
 672   else
 673     action->variable =
 674         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 675                          constraints_per_variable);
 676
 677   if (action->rate < 0) {
 678     if (action->lat_current > 0)
 679       lmm_update_variable_bound(network_maxmin_system, action->variable,
 680                                 sg_tcp_gamma / (2.0 *
 681                                                 action->lat_current));
 682     else
 683       lmm_update_variable_bound(network_maxmin_system, action->variable,
 684                                 -1.0);
 685   } else {
 686     if (action->lat_current > 0)
 687       lmm_update_variable_bound(network_maxmin_system, action->variable,
 688                                 min(action->rate,
 689                                     sg_tcp_gamma / (2.0 *
 690                                                     action->lat_current)));
 691     else
 692       lmm_update_variable_bound(network_maxmin_system, action->variable,
 693                                 action->rate);
 694   }
 695
 696   xbt_dynar_foreach(route, i, link) {
 697     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 698                action->variable, 1.0);
 699   }
 700
 701   if (sg_network_fullduplex == 1) {
 702     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 703     xbt_dynar_foreach(back_route, i, link) {
 704       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 705                  action->variable, .05);
 706     }
 707   }
 708   /* LARGE PLATFORMS HACK:
 709      expand also with src->link and dst->link */
 710 #ifdef HAVE_TRACING
 711   if (TRACE_is_enabled()) {
 712     action->src_name = xbt_strdup(src_name);
 713     action->dst_name = xbt_strdup(dst_name);
 714   } else {
 715     action->src_name = action->dst_name = NULL;
 716   }
 717 #endif
 718
 719   xbt_dynar_free(&route);
 720   XBT_OUT();
 721
 722   return (surf_action_t) action;
 723 }
 724
 725 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 726 {
 727   return global_routing->get_route(src, dst);
 728 }
 729
 730 static double net_get_link_bandwidth(const void *link)
 731 {
 732   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 733   return lmm->power.peak * lmm->power.scale;
 734 }
 735
 736 static double net_get_link_latency(const void *link)
 737 {
 738   return ((link_CM02_t) link)->lat_current;
 739 }
 740
 741 static int net_link_shared(const void *link)
 742 {
 743   return
 744       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 745 }
 746
 747 static void net_action_suspend(surf_action_t action)
 748 {
 749   ((surf_action_network_CM02_t) action)->suspended = 1;
 750   lmm_update_variable_weight(network_maxmin_system,
 751                              ((surf_action_network_CM02_t)
 752                               action)->variable, 0.0);
 753 }
 754
 755 static void net_action_resume(surf_action_t action)
 756 {
 757   if (((surf_action_network_CM02_t) action)->suspended) {
 758     lmm_update_variable_weight(network_maxmin_system,
 759                                ((surf_action_network_CM02_t)
 760                                 action)->variable,
 761                                ((surf_action_network_CM02_t)
 762                                 action)->weight);
 763     ((surf_action_network_CM02_t) action)->suspended = 0;
 764   }
 765 }
 766
 767 static int net_action_is_suspended(surf_action_t action)
 768 {
 769   return ((surf_action_network_CM02_t) action)->suspended;
 770 }
 771
 772 void net_action_set_max_duration(surf_action_t action, double duration)
 773 {
 774   action->max_duration = duration;
 775 }
 776
 777 #ifdef HAVE_TRACING
 778 static void net_action_set_category(surf_action_t action, const char *category)
 779 {
 780   action->category = xbt_strdup (category);
 781 }
 782 #endif
 783
 784 static void net_finalize(void)
 785 {
 786   surf_model_exit(surf_network_model);
 787   surf_network_model = NULL;
 788
 789   global_routing->finalize();
 790
 791   lmm_system_free(network_maxmin_system);
 792   network_maxmin_system = NULL;
 793 }
 794
 795 static void surf_network_model_init_internal(void)
 796 {
 797   surf_network_model = surf_model_init();
 798
 799   surf_network_model->name = "network";
 800   surf_network_model->action_unref = net_action_unref;
 801   surf_network_model->action_cancel = net_action_cancel;
 802   surf_network_model->action_recycle = net_action_recycle;
 803   surf_network_model->get_remains = net_action_get_remains;
 804 #ifdef HAVE_LATENCY_BOUND_TRACKING
 805   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 806 #endif
 807
 808   surf_network_model->model_private->resource_used = net_resource_used;
 809   surf_network_model->model_private->share_resources = net_share_resources;
 810   surf_network_model->model_private->update_actions_state =
 811       net_update_actions_state;
 812   surf_network_model->model_private->update_resource_state =
 813       net_update_resource_state;
 814   surf_network_model->model_private->finalize = net_finalize;
 815
 816   surf_network_model->suspend = net_action_suspend;
 817   surf_network_model->resume = net_action_resume;
 818   surf_network_model->is_suspended = net_action_is_suspended;
 819   surf_network_model->set_max_duration = net_action_set_max_duration;
 820 #ifdef HAVE_TRACING
 821   surf_network_model->set_category = net_action_set_category;
 822 #endif
 823
 824   surf_network_model->extension.network.communicate = net_communicate;
 825   surf_network_model->extension.network.get_route = net_get_route;
 826   surf_network_model->extension.network.get_link_bandwidth =
 827       net_get_link_bandwidth;
 828   surf_network_model->extension.network.get_link_latency =
 829       net_get_link_latency;
 830   surf_network_model->extension.network.link_shared = net_link_shared;
 831   surf_network_model->extension.network.add_traces = net_add_traces;
 832   surf_network_model->extension.network.create_resource =
 833       net_create_resource;
 834
 835   if (!network_maxmin_system)
 836     network_maxmin_system = lmm_system_new();
 837
 838   routing_model_create(sizeof(link_CM02_t),
 839                        net_create_resource("__loopback__",
 840                                            498000000, NULL,
 841                                            0.000015, NULL,
 842                                            SURF_RESOURCE_ON, NULL,
 843                                            SURF_LINK_FATPIPE, NULL),
 844                        net_get_link_latency);
 845 }
 846
 847
 848
 849 /************************************************************************/
 850 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 851 /************************************************************************/
 852 void surf_network_model_init_SMPI(void)
 853 {
 854
 855   if (surf_network_model)
 856     return;
 857   surf_network_model_init_internal();
 858   latency_factor_callback = &smpi_latency_factor;
 859   bandwidth_factor_callback = &smpi_bandwidth_factor;
 860   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 861   net_define_callbacks();
 862   xbt_dynar_push(model_list, &surf_network_model);
 863   network_solve = lmm_solve;
 864
 865   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
 866   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 867
 868   update_model_description(surf_network_model_description,
 869                            "SMPI", surf_network_model);
 870 }
 871
 872 /************************************************************************/
 873 /* New model based on optimizations discussed during this thesis        */
 874 /************************************************************************/
 875 void surf_network_model_init_LegrandVelho(void)
 876 {
 877
 878   if (surf_network_model)
 879     return;
 880   surf_network_model_init_internal();
 881   net_define_callbacks();
 882   xbt_dynar_push(model_list, &surf_network_model);
 883   network_solve = lmm_solve;
 884
 885   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 886   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 887                             0.92);
 888   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 889
 890   update_model_description(surf_network_model_description,
 891                            "LV08_fullupdate", surf_network_model);
 892 }
 893
 894 /***************************************************************************/
 895 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 896 /***************************************************************************/
 897 /* @TechReport{      rr-lip2002-40, */
 898 /*   author        = {Henri Casanova and Loris Marchal}, */
 899 /*   institution   = {LIP}, */
 900 /*   title         = {A Network Model for Simulation of Grid Application}, */
 901 /*   number        = {2002-40}, */
 902 /*   month         = {oct}, */
 903 /*   year          = {2002} */
 904 /* } */
 905 void surf_network_model_init_CM02(void)
 906 {
 907
 908   if (surf_network_model)
 909     return;
 910   surf_network_model_init_internal();
 911   net_define_callbacks();
 912   xbt_dynar_push(model_list, &surf_network_model);
 913   network_solve = lmm_solve;
 914
 915   update_model_description(surf_network_model_description,
 916                            "CM02", surf_network_model);
 917 }
 918
 919 void surf_network_model_init_Reno(void)
 920 {
 921   if (surf_network_model)
 922     return;
 923   surf_network_model_init_internal();
 924   net_define_callbacks();
 925
 926   xbt_dynar_push(model_list, &surf_network_model);
 927   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 928                                     func_reno_fpi);
 929   network_solve = lagrange_solve;
 930
 931   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 932   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 933                             0.92);
 934   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 935
 936   update_model_description(surf_network_model_description,
 937                            "Reno", surf_network_model);
 938 }
 939
 940
 941 void surf_network_model_init_Reno2(void)
 942 {
 943   if (surf_network_model)
 944     return;
 945   surf_network_model_init_internal();
 946   net_define_callbacks();
 947
 948   xbt_dynar_push(model_list, &surf_network_model);
 949   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 950                                     func_reno2_fpi);
 951   network_solve = lagrange_solve;
 952
 953   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 954   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 955                             0.92);
 956   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
 957                             8775);
 958
 959   update_model_description(surf_network_model_description,
 960                            "Reno2", surf_network_model);
 961 }
 962
 963 void surf_network_model_init_Vegas(void)
 964 {
 965   if (surf_network_model)
 966     return;
 967   surf_network_model_init_internal();
 968   net_define_callbacks();
 969
 970   xbt_dynar_push(model_list, &surf_network_model);
 971   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 972                                     func_vegas_fpi);
 973   network_solve = lagrange_solve;
 974
 975   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 976   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 977                             0.92);
 978   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 979
 980   update_model_description(surf_network_model_description,
 981                            "Vegas", surf_network_model);
 982 }