src/surf/network.c

   1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. 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
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  14                                 "Logging specific to the SURF network module");
  15
  16 surf_model_t surf_network_model = NULL;
  17 static lmm_system_t network_maxmin_system = NULL;
  18 static void (*network_solve) (lmm_system_t) = NULL;
  19
  20 double sg_sender_gap = 0.0;
  21 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  22 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  23 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  24
  25 double sg_tcp_gamma = 0.0;
  26 int sg_network_fullduplex = 0;
  27
  28 xbt_dict_t gap_lookup = NULL;
  29
  30 static double net_get_link_bandwidth(const void *link);
  31
  32 static void gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
  33    const char* src = link->lmm_resource.generic_resource.name;
  34    xbt_fifo_t fifo;
  35    surf_action_network_CM02_t last_action;
  36    double bw;
  37
  38    if(sg_sender_gap > 0.0) {
  39       if(!gap_lookup) {
  40          gap_lookup = xbt_dict_new();
  41       }
  42       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
  43       action->sender.gap = 0.0;
  44       if(fifo && xbt_fifo_size(fifo) > 0) {
  45          /* Compute gap from last send */
  46          last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
  47          bw = net_get_link_bandwidth(link);
  48          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
  49          action->latency += action->sender.gap;
  50       }
  51       /* Append action as last send */
  52       action->sender.link_name = link->lmm_resource.generic_resource.name;
  53       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
  54       if(!fifo) {
  55          fifo = xbt_fifo_new();
  56          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
  57       }
  58       action->sender.fifo_item = xbt_fifo_push(fifo, action);
  59       action->sender.size = size;
  60    }
  61 }
  62
  63 static void gap_unknown(surf_action_network_CM02_t action) {
  64    action->sender.gap = 0.0;
  65    action->sender.link_name = NULL;
  66    action->sender.fifo_item = NULL;
  67    action->sender.size = 0.0;
  68 }
  69
  70 static void gap_remove(surf_action_network_CM02_t action) {
  71    xbt_fifo_t fifo;
  72    size_t size;
  73
  74    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
  75       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
  76       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
  77       size = xbt_fifo_size(fifo);
  78       if(size == 0) {
  79          xbt_fifo_free(fifo);
  80          xbt_dict_remove(gap_lookup, action->sender.link_name);
  81          size = xbt_dict_size(gap_lookup);
  82          if(size == 0) {
  83             xbt_dict_free(&gap_lookup);
  84          }
  85       }
  86    }
  87 }
  88
  89 /******************************************************************************/
  90 /*                           Factors callbacks                                */
  91 /******************************************************************************/
  92 static double constant_latency_factor(double size)
  93 {
  94   return sg_latency_factor;
  95 }
  96
  97 static double constant_bandwidth_factor(double size)
  98 {
  99   return sg_bandwidth_factor;
 100 }
 101
 102 static double constant_bandwidth_constraint(double rate, double bound,
 103                                             double size)
 104 {
 105   return rate;
 106 }
 107
 108 /**********************/
 109 /*   SMPI callbacks   */
 110 /**********************/
 111 static double smpi_latency_factor(double size)
 112 {
 113   /* 1 B <= size <= 1 KiB */
 114   if (size <= 1024.0) {
 115     return 1.0056;
 116   }
 117
 118   /* 2 KiB <= size <= 32 KiB */
 119   if (size <= 32768.0) {
 120     return 1.8805;
 121   }
 122
 123   /* 64 KiB <= size <= 4 MiB */
 124   return 22.7111;
 125 }
 126
 127 static double smpi_bandwidth_factor(double size)
 128 {
 129   /* 1 B <= size <= 1 KiB */
 130   if (size <= 1024.0) {
 131     return 0.2758;
 132   }
 133
 134   /* 2 KiB <= size <= 32 KiB */
 135   if (size <= 32768.0) {
 136     return 0.5477;
 137   }
 138
 139   /* 64 KiB <= size <= 4 MiB */
 140   return 0.9359;
 141 }
 142
 143 static double smpi_bandwidth_constraint(double rate, double bound,
 144                                         double size)
 145 {
 146   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 147 }
 148
 149
 150 static double (*latency_factor_callback) (double) =
 151     &constant_latency_factor;
 152 static double (*bandwidth_factor_callback) (double) =
 153     &constant_bandwidth_factor;
 154 static double (*bandwidth_constraint_callback) (double, double, double) =
 155     &constant_bandwidth_constraint;
 156
 157
 158 static void* net_create_resource(const char *name,
 159                                 double bw_initial,
 160                                 tmgr_trace_t bw_trace,
 161                                 double lat_initial,
 162                                 tmgr_trace_t lat_trace,
 163                                 e_surf_resource_state_t
 164                                 state_initial,
 165                                 tmgr_trace_t state_trace,
 166                                 e_surf_link_sharing_policy_t
 167                                 policy, xbt_dict_t properties)
 168 {
 169   link_CM02_t nw_link = (link_CM02_t)
 170       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 171                             surf_network_model, name, properties,
 172                             network_maxmin_system,
 173                             sg_bandwidth_factor * bw_initial,
 174                             history,
 175                             state_initial, state_trace,
 176                             bw_initial, bw_trace);
 177
 178   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 179               "Link '%s' declared several times in the platform file.",
 180               name);
 181
 182   nw_link->lat_current = lat_initial;
 183   if (lat_trace)
 184     nw_link->lat_event =
 185         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 186
 187   if (policy == SURF_LINK_FATPIPE)
 188     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 189
 190   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 191
 192   return nw_link;
 193 }
 194
 195 static void net_parse_link_init(void)
 196 {
 197   XBT_DEBUG("link_CM02");
 198
 199   if(struct_lnk->V_policy_initial_link == SURF_LINK_FULLDUPLEX)
 200   {
 201     net_create_resource(bprintf("%s_UP",struct_lnk->V_link_id), struct_lnk->V_link_bandwidth, struct_lnk->V_link_bandwidth_file,
 202                        struct_lnk->V_link_latency, struct_lnk->V_link_latency_file, struct_lnk->V_link_state, struct_lnk->V_link_state_file,
 203                        struct_lnk->V_policy_initial_link, xbt_dict_new());
 204     net_create_resource(bprintf("%s_DOWN",struct_lnk->V_link_id), struct_lnk->V_link_bandwidth, struct_lnk->V_link_bandwidth_file,
 205             struct_lnk->V_link_latency, struct_lnk->V_link_latency_file, struct_lnk->V_link_state, struct_lnk->V_link_state_file,
 206                        struct_lnk->V_policy_initial_link, xbt_dict_new());
 207   }
 208   else
 209   {
 210     net_create_resource(xbt_strdup(struct_lnk->V_link_id), struct_lnk->V_link_bandwidth, struct_lnk->V_link_bandwidth_file,
 211                 struct_lnk->V_link_latency, struct_lnk->V_link_latency_file, struct_lnk->V_link_state, struct_lnk->V_link_state_file,
 212                        struct_lnk->V_policy_initial_link, xbt_dict_new());
 213   }
 214
 215 }
 216
 217 static void net_add_traces(void)
 218 {
 219   xbt_dict_cursor_t cursor = NULL;
 220   char *trace_name, *elm;
 221
 222   static int called = 0;
 223   if (called)
 224     return;
 225   called = 1;
 226
 227   /* connect all traces relative to network */
 228   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 229     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 230     link_CM02_t link =
 231         xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 232
 233     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 234                 trace_name, elm);
 235     xbt_assert(trace,
 236                 "Cannot connect trace %s to link %s: trace undefined",
 237                 trace_name, elm);
 238
 239     link->lmm_resource.state_event =
 240         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 241   }
 242
 243   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 244     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 245     link_CM02_t link =
 246                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 247
 248     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 249                 trace_name, elm);
 250     xbt_assert(trace,
 251                 "Cannot connect trace %s to link %s: trace undefined",
 252                 trace_name, elm);
 253
 254     link->lmm_resource.power.event =
 255         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 256   }
 257
 258   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 259     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 260     link_CM02_t link =
 261                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 262
 263     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 264                 trace_name, elm);
 265     xbt_assert(trace,
 266                 "Cannot connect trace %s to link %s: trace undefined",
 267                 trace_name, elm);
 268
 269     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 270   }
 271 }
 272
 273 static void net_define_callbacks(void)
 274 {
 275   /* Figuring out the network links */
 276   surfxml_add_callback(STag_surfxml_link_cb_list, &net_parse_link_init);
 277   surfxml_add_callback(ETag_surfxml_platform_cb_list, &net_add_traces);
 278 }
 279
 280 static int net_resource_used(void *resource_id)
 281 {
 282   return lmm_constraint_used(network_maxmin_system,
 283                              ((surf_resource_lmm_t)
 284                               resource_id)->constraint);
 285 }
 286
 287 static int net_action_unref(surf_action_t action)
 288 {
 289   action->refcount--;
 290   if (!action->refcount) {
 291     xbt_swag_remove(action, action->state_set);
 292     if (((surf_action_network_CM02_t) action)->variable)
 293       lmm_variable_free(network_maxmin_system,
 294                         ((surf_action_network_CM02_t) action)->variable);
 295 #ifdef HAVE_TRACING
 296     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 297     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 298     if (action->category)
 299       xbt_free(action->category);
 300 #endif
 301     surf_action_free(&action);
 302     return 1;
 303   }
 304   return 0;
 305 }
 306
 307 static void net_action_cancel(surf_action_t action)
 308 {
 309   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 310 }
 311
 312 void net_action_recycle(surf_action_t action)
 313 {
 314   return;
 315 }
 316
 317 #ifdef HAVE_LATENCY_BOUND_TRACKING
 318 int net_get_link_latency_limited(surf_action_t action)
 319 {
 320   return action->latency_limited;
 321 }
 322 #endif
 323
 324 double net_action_get_remains(surf_action_t action)
 325 {
 326   return action->remains;
 327 }
 328
 329 static double net_share_resources(double now)
 330 {
 331   s_surf_action_network_CM02_t s_action;
 332   surf_action_network_CM02_t action = NULL;
 333   xbt_swag_t running_actions =
 334       surf_network_model->states.running_action_set;
 335   double min;
 336
 337   min = generic_maxmin_share_resources(running_actions,
 338                                        xbt_swag_offset(s_action,
 339                                                        variable),
 340                                        network_maxmin_system,
 341                                        network_solve);
 342
 343 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 344
 345   xbt_swag_foreach(action, running_actions) {
 346 #ifdef HAVE_LATENCY_BOUND_TRACKING
 347     if (lmm_is_variable_limited_by_latency(action->variable)) {
 348       (action->generic_action).latency_limited = 1;
 349     } else {
 350       (action->generic_action).latency_limited = 0;
 351     }
 352 #endif
 353     if (action->latency > 0) {
 354       if (min < 0)
 355         min = action->latency;
 356       else if (action->latency < min)
 357         min = action->latency;
 358     }
 359   }
 360
 361   XBT_DEBUG("Min of share resources %f", min);
 362
 363   return min;
 364 }
 365
 366 static void net_update_actions_state(double now, double delta)
 367 {
 368   double deltap = 0.0;
 369   surf_action_network_CM02_t action = NULL;
 370   surf_action_network_CM02_t next_action = NULL;
 371   xbt_swag_t running_actions =
 372       surf_network_model->states.running_action_set;
 373   /*
 374      xbt_swag_t failed_actions =
 375      surf_network_model->states.failed_action_set;
 376    */
 377
 378   xbt_swag_foreach_safe(action, next_action, running_actions) {
 379     deltap = delta;
 380     if (action->latency > 0) {
 381       if (action->latency > deltap) {
 382         double_update(&(action->latency), deltap);
 383         deltap = 0.0;
 384       } else {
 385         double_update(&(deltap), action->latency);
 386         action->latency = 0.0;
 387       }
 388       if ((action->latency == 0.0) && !(action->suspended))
 389         lmm_update_variable_weight(network_maxmin_system, action->variable,
 390                                    action->weight);
 391     }
 392 #ifdef HAVE_TRACING
 393     if (TRACE_is_enabled()) {
 394       xbt_dynar_t route = global_routing->get_route(action->src_name,
 395                                                     action->dst_name);
 396       link_CM02_t link;
 397       unsigned int i;
 398       xbt_dynar_foreach(route, i, link) {
 399         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 400                                         action->generic_action.data,
 401                                         (surf_action_t) action,
 402                                         lmm_variable_getvalue
 403                                         (action->variable), now - delta,
 404                                         delta);
 405       }
 406     }
 407 #endif
 408     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 409                                 /* There is actually no link used, hence an infinite bandwidth.
 410                                  * This happens often when using models like vivaldi.
 411                                  * In such case, just make sure that the action completes immediately.
 412                                  */
 413         double_update(&(action->generic_action.remains),
 414                         action->generic_action.remains);
 415     }
 416     double_update(&(action->generic_action.remains),
 417                   lmm_variable_getvalue(action->variable) * deltap);
 418     if (action->generic_action.max_duration != NO_MAX_DURATION)
 419       double_update(&(action->generic_action.max_duration), delta);
 420
 421     if ((action->generic_action.remains <= 0) &&
 422         (lmm_get_variable_weight(action->variable) > 0)) {
 423       action->generic_action.finish = surf_get_clock();
 424       surf_network_model->action_state_set((surf_action_t) action,
 425                                            SURF_ACTION_DONE);
 426       gap_remove(action);
 427     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 428                && (action->generic_action.max_duration <= 0)) {
 429       action->generic_action.finish = surf_get_clock();
 430       surf_network_model->action_state_set((surf_action_t) action,
 431                                            SURF_ACTION_DONE);
 432       gap_remove(action);
 433     }
 434   }
 435
 436   return;
 437 }
 438
 439 static void net_update_resource_state(void *id,
 440                                       tmgr_trace_event_t event_type,
 441                                       double value, double date)
 442 {
 443   link_CM02_t nw_link = id;
 444   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 445   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 446   /*     value, event_type); */
 447
 448   if (event_type == nw_link->lmm_resource.power.event) {
 449     double delta =
 450         sg_weight_S_parameter / value - sg_weight_S_parameter /
 451         (nw_link->lmm_resource.power.peak *
 452          nw_link->lmm_resource.power.scale);
 453     lmm_variable_t var = NULL;
 454     lmm_element_t elem = NULL;
 455     surf_action_network_CM02_t action = NULL;
 456
 457     nw_link->lmm_resource.power.peak = value;
 458     lmm_update_constraint_bound(network_maxmin_system,
 459                                 nw_link->lmm_resource.constraint,
 460                                 sg_bandwidth_factor *
 461                                 (nw_link->lmm_resource.power.peak *
 462                                  nw_link->lmm_resource.power.scale));
 463 #ifdef HAVE_TRACING
 464     TRACE_surf_link_set_bandwidth(date, nw_link->lmm_resource.generic_resource.name,
 465                                   sg_bandwidth_factor *
 466                                   (nw_link->lmm_resource.power.peak *
 467                                    nw_link->lmm_resource.power.scale));
 468 #endif
 469     if (sg_weight_S_parameter > 0) {
 470       while ((var = lmm_get_var_from_cnst
 471               (network_maxmin_system, nw_link->lmm_resource.constraint,
 472                &elem))) {
 473         action = lmm_variable_id(var);
 474         action->weight += delta;
 475         if (!(action->suspended))
 476           lmm_update_variable_weight(network_maxmin_system,
 477                                      action->variable, action->weight);
 478       }
 479     }
 480     if (tmgr_trace_event_free(event_type))
 481       nw_link->lmm_resource.power.event = NULL;
 482   } else if (event_type == nw_link->lat_event) {
 483     double delta = value - nw_link->lat_current;
 484     lmm_variable_t var = NULL;
 485     lmm_element_t elem = NULL;
 486     surf_action_network_CM02_t action = NULL;
 487
 488     nw_link->lat_current = value;
 489     while ((var = lmm_get_var_from_cnst
 490             (network_maxmin_system, nw_link->lmm_resource.constraint,
 491              &elem))) {
 492       action = lmm_variable_id(var);
 493       action->lat_current += delta;
 494       action->weight += delta;
 495       if (action->rate < 0)
 496         lmm_update_variable_bound(network_maxmin_system, action->variable,
 497                                   sg_tcp_gamma / (2.0 *
 498                                                   action->lat_current));
 499       else {
 500         lmm_update_variable_bound(network_maxmin_system, action->variable,
 501                                   min(action->rate,
 502                                       sg_tcp_gamma / (2.0 *
 503                                                       action->lat_current)));
 504
 505         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 506           XBT_INFO("Flow is limited BYBANDWIDTH");
 507         } else {
 508           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 509                 action->lat_current);
 510         }
 511       }
 512       if (!(action->suspended))
 513         lmm_update_variable_weight(network_maxmin_system, action->variable,
 514                                    action->weight);
 515
 516     }
 517     if (tmgr_trace_event_free(event_type))
 518       nw_link->lat_event = NULL;
 519   } else if (event_type == nw_link->lmm_resource.state_event) {
 520     if (value > 0)
 521       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 522     else {
 523       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 524       lmm_variable_t var = NULL;
 525       lmm_element_t elem = NULL;
 526
 527       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 528       while ((var = lmm_get_var_from_cnst
 529               (network_maxmin_system, cnst, &elem))) {
 530         surf_action_t action = lmm_variable_id(var);
 531
 532         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 533             surf_action_state_get(action) == SURF_ACTION_READY) {
 534           action->finish = date;
 535           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 536         }
 537       }
 538     }
 539     if (tmgr_trace_event_free(event_type))
 540       nw_link->lmm_resource.state_event = NULL;
 541   } else {
 542     XBT_CRITICAL("Unknown event ! \n");
 543     xbt_abort();
 544   }
 545
 546   return;
 547 }
 548
 549
 550 static surf_action_t net_communicate(const char *src_name,
 551                                      const char *dst_name, double size,
 552                                      double rate)
 553 {
 554   unsigned int i;
 555   link_CM02_t link;
 556   int failed = 0;
 557   surf_action_network_CM02_t action = NULL;
 558   double bandwidth_bound;
 559   double latency=0.0;
 560   /* LARGE PLATFORMS HACK:
 561      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 562      Use the cluster_id for ->id */
 563
 564   xbt_dynar_t back_route = NULL;
 565   int constraints_per_variable = 0;
 566   xbt_dynar_t route;
 567   // I will need this route for some time so require for no cleanup
 568   global_routing->get_route_latency(src_name, dst_name, &route, &latency, 0);
 569
 570   if (sg_network_fullduplex == 1) {
 571     back_route = global_routing->get_route(dst_name, src_name);
 572   }
 573
 574   /* LARGE PLATFORMS HACK:
 575      total_route_size = route_size + src->link_nb + dst->nb */
 576
 577   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 578   /* LARGE PLATFORMS HACK:
 579      assert on total_route_size */
 580   xbt_assert(xbt_dynar_length(route) || latency,
 581               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 582               src_name, dst_name);
 583
 584   xbt_dynar_foreach(route, i, link) {
 585     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 586       failed = 1;
 587       break;
 588     }
 589   }
 590   action =
 591       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 592                       surf_network_model, failed);
 593 #ifdef HAVE_LATENCY_BOUND_TRACKING
 594   (action->generic_action).latency_limited = 0;
 595 #endif
 596   action->weight = action->latency = latency;
 597
 598   xbt_swag_insert(action, action->generic_action.state_set);
 599   action->rate = rate;
 600
 601   bandwidth_bound = -1.0;
 602
 603   xbt_dynar_foreach(route, i, link) {
 604     action->weight +=
 605         sg_weight_S_parameter /
 606         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 607     if (bandwidth_bound < 0.0)
 608       bandwidth_bound =
 609           (*bandwidth_factor_callback) (size) *
 610           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 611     else
 612       bandwidth_bound =
 613           min(bandwidth_bound,
 614               (*bandwidth_factor_callback) (size) *
 615               (link->lmm_resource.power.peak *
 616                link->lmm_resource.power.scale));
 617   }
 618   /* LARGE PLATFORMS HACK:
 619      Add src->link and dst->link latencies */
 620   action->lat_current = action->latency;
 621   action->latency *= (*latency_factor_callback) (size);
 622   action->rate =
 623       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 624                                         size);
 625
 626   if(xbt_dynar_length(route) > 0) {
 627     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 628     gap_append(size, link, action);
 629     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 630            action, src_name, dst_name, action->sender.gap, action->latency);
 631   } else {
 632     gap_unknown(action);
 633   }
 634
 635
 636   /* LARGE PLATFORMS HACK:
 637      lmm_variable_new(..., total_route_size) */
 638   if (back_route != NULL) {
 639     constraints_per_variable =
 640         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 641   } else {
 642     constraints_per_variable = xbt_dynar_length(route);
 643   }
 644
 645   if (action->latency > 0)
 646     action->variable =
 647         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 648                          constraints_per_variable);
 649   else
 650     action->variable =
 651         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 652                          constraints_per_variable);
 653
 654   if (action->rate < 0) {
 655     if (action->lat_current > 0)
 656       lmm_update_variable_bound(network_maxmin_system, action->variable,
 657                                 sg_tcp_gamma / (2.0 *
 658                                                 action->lat_current));
 659     else
 660       lmm_update_variable_bound(network_maxmin_system, action->variable,
 661                                 -1.0);
 662   } else {
 663     if (action->lat_current > 0)
 664       lmm_update_variable_bound(network_maxmin_system, action->variable,
 665                                 min(action->rate,
 666                                     sg_tcp_gamma / (2.0 *
 667                                                     action->lat_current)));
 668     else
 669       lmm_update_variable_bound(network_maxmin_system, action->variable,
 670                                 action->rate);
 671   }
 672
 673   xbt_dynar_foreach(route, i, link) {
 674     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 675                action->variable, 1.0);
 676   }
 677
 678   if (sg_network_fullduplex == 1) {
 679     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 680     xbt_dynar_foreach(back_route, i, link) {
 681       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 682                  action->variable, .05);
 683     }
 684   }
 685   /* LARGE PLATFORMS HACK:
 686      expand also with src->link and dst->link */
 687 #ifdef HAVE_TRACING
 688   if (TRACE_is_enabled()) {
 689     action->src_name = xbt_strdup(src_name);
 690     action->dst_name = xbt_strdup(dst_name);
 691   } else {
 692     action->src_name = action->dst_name = NULL;
 693   }
 694 #endif
 695
 696   xbt_dynar_free(&route);
 697   XBT_OUT();
 698
 699   return (surf_action_t) action;
 700 }
 701
 702 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 703 {
 704   return global_routing->get_route(src, dst);
 705 }
 706
 707 static double net_get_link_bandwidth(const void *link)
 708 {
 709   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 710   return lmm->power.peak * lmm->power.scale;
 711 }
 712
 713 static double net_get_link_latency(const void *link)
 714 {
 715   return ((link_CM02_t) link)->lat_current;
 716 }
 717
 718 static int net_link_shared(const void *link)
 719 {
 720   return
 721       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 722 }
 723
 724 static void net_action_suspend(surf_action_t action)
 725 {
 726   ((surf_action_network_CM02_t) action)->suspended = 1;
 727   lmm_update_variable_weight(network_maxmin_system,
 728                              ((surf_action_network_CM02_t)
 729                               action)->variable, 0.0);
 730 }
 731
 732 static void net_action_resume(surf_action_t action)
 733 {
 734   if (((surf_action_network_CM02_t) action)->suspended) {
 735     lmm_update_variable_weight(network_maxmin_system,
 736                                ((surf_action_network_CM02_t)
 737                                 action)->variable,
 738                                ((surf_action_network_CM02_t)
 739                                 action)->weight);
 740     ((surf_action_network_CM02_t) action)->suspended = 0;
 741   }
 742 }
 743
 744 static int net_action_is_suspended(surf_action_t action)
 745 {
 746   return ((surf_action_network_CM02_t) action)->suspended;
 747 }
 748
 749 void net_action_set_max_duration(surf_action_t action, double duration)
 750 {
 751   action->max_duration = duration;
 752 }
 753
 754 #ifdef HAVE_TRACING
 755 static void net_action_set_category(surf_action_t action, const char *category)
 756 {
 757   action->category = xbt_strdup (category);
 758 }
 759 #endif
 760
 761 static void net_finalize(void)
 762 {
 763   surf_model_exit(surf_network_model);
 764   surf_network_model = NULL;
 765
 766   global_routing->finalize();
 767
 768   lmm_system_free(network_maxmin_system);
 769   network_maxmin_system = NULL;
 770 }
 771
 772 static void surf_network_model_init_internal(void)
 773 {
 774   surf_network_model = surf_model_init();
 775
 776   surf_network_model->name = "network";
 777   surf_network_model->action_unref = net_action_unref;
 778   surf_network_model->action_cancel = net_action_cancel;
 779   surf_network_model->action_recycle = net_action_recycle;
 780   surf_network_model->get_remains = net_action_get_remains;
 781 #ifdef HAVE_LATENCY_BOUND_TRACKING
 782   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 783 #endif
 784
 785   surf_network_model->model_private->resource_used = net_resource_used;
 786   surf_network_model->model_private->share_resources = net_share_resources;
 787   surf_network_model->model_private->update_actions_state =
 788       net_update_actions_state;
 789   surf_network_model->model_private->update_resource_state =
 790       net_update_resource_state;
 791   surf_network_model->model_private->finalize = net_finalize;
 792
 793   surf_network_model->suspend = net_action_suspend;
 794   surf_network_model->resume = net_action_resume;
 795   surf_network_model->is_suspended = net_action_is_suspended;
 796   surf_network_model->set_max_duration = net_action_set_max_duration;
 797 #ifdef HAVE_TRACING
 798   surf_network_model->set_category = net_action_set_category;
 799 #endif
 800
 801   surf_network_model->extension.network.communicate = net_communicate;
 802   surf_network_model->extension.network.get_route = net_get_route;
 803   surf_network_model->extension.network.get_link_bandwidth =
 804       net_get_link_bandwidth;
 805   surf_network_model->extension.network.get_link_latency =
 806       net_get_link_latency;
 807   surf_network_model->extension.network.link_shared = net_link_shared;
 808   surf_network_model->extension.network.add_traces = net_add_traces;
 809   surf_network_model->extension.network.create_resource =
 810       net_create_resource;
 811
 812   if (!network_maxmin_system)
 813     network_maxmin_system = lmm_system_new();
 814
 815   routing_model_create(sizeof(link_CM02_t),
 816       net_create_resource(xbt_strdup("__loopback__"),
 817           498000000, NULL, 0.000015, NULL,
 818             SURF_RESOURCE_ON, NULL,
 819             SURF_LINK_FATPIPE, NULL),
 820             net_get_link_latency);
 821 }
 822
 823
 824
 825 /************************************************************************/
 826 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 827 /************************************************************************/
 828 void surf_network_model_init_SMPI(void)
 829 {
 830
 831   if (surf_network_model)
 832     return;
 833   surf_network_model_init_internal();
 834   latency_factor_callback = &smpi_latency_factor;
 835   bandwidth_factor_callback = &smpi_bandwidth_factor;
 836   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 837   net_define_callbacks();
 838   xbt_dynar_push(model_list, &surf_network_model);
 839   network_solve = lmm_solve;
 840
 841   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
 842   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 843
 844   update_model_description(surf_network_model_description,
 845                            "SMPI", surf_network_model);
 846 }
 847
 848 /************************************************************************/
 849 /* New model based on optimizations discussed during this thesis        */
 850 /************************************************************************/
 851 void surf_network_model_init_LegrandVelho(void)
 852 {
 853
 854   if (surf_network_model)
 855     return;
 856   surf_network_model_init_internal();
 857   net_define_callbacks();
 858   xbt_dynar_push(model_list, &surf_network_model);
 859   network_solve = lmm_solve;
 860
 861   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 862   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 863                             0.92);
 864   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 865
 866   update_model_description(surf_network_model_description,
 867                            "LV08_fullupdate", surf_network_model);
 868 }
 869
 870 /***************************************************************************/
 871 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 872 /***************************************************************************/
 873 /* @TechReport{      rr-lip2002-40, */
 874 /*   author        = {Henri Casanova and Loris Marchal}, */
 875 /*   institution   = {LIP}, */
 876 /*   title         = {A Network Model for Simulation of Grid Application}, */
 877 /*   number        = {2002-40}, */
 878 /*   month         = {oct}, */
 879 /*   year          = {2002} */
 880 /* } */
 881 void surf_network_model_init_CM02(void)
 882 {
 883
 884   if (surf_network_model)
 885     return;
 886   surf_network_model_init_internal();
 887   net_define_callbacks();
 888   xbt_dynar_push(model_list, &surf_network_model);
 889   network_solve = lmm_solve;
 890
 891   update_model_description(surf_network_model_description,
 892                            "CM02", surf_network_model);
 893 }
 894
 895 void surf_network_model_init_Reno(void)
 896 {
 897   if (surf_network_model)
 898     return;
 899   surf_network_model_init_internal();
 900   net_define_callbacks();
 901
 902   xbt_dynar_push(model_list, &surf_network_model);
 903   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 904                                     func_reno_fpi);
 905   network_solve = lagrange_solve;
 906
 907   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 908   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 909                             0.92);
 910   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 911
 912   update_model_description(surf_network_model_description,
 913                            "Reno", surf_network_model);
 914 }
 915
 916
 917 void surf_network_model_init_Reno2(void)
 918 {
 919   if (surf_network_model)
 920     return;
 921   surf_network_model_init_internal();
 922   net_define_callbacks();
 923
 924   xbt_dynar_push(model_list, &surf_network_model);
 925   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 926                                     func_reno2_fpi);
 927   network_solve = lagrange_solve;
 928
 929   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 930   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 931                             0.92);
 932   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
 933                             8775);
 934
 935   update_model_description(surf_network_model_description,
 936                            "Reno2", surf_network_model);
 937 }
 938
 939 void surf_network_model_init_Vegas(void)
 940 {
 941   if (surf_network_model)
 942     return;
 943   surf_network_model_init_internal();
 944   net_define_callbacks();
 945
 946   xbt_dynar_push(model_list, &surf_network_model);
 947   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 948                                     func_vegas_fpi);
 949   network_solve = lagrange_solve;
 950
 951   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 952   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 953                             0.92);
 954   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 955
 956   update_model_description(surf_network_model_description,
 957                            "Vegas", surf_network_model);
 958 }