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 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  12                                 "Logging specific to the SURF network module");
  13
  14 surf_model_t surf_network_model = NULL;
  15 static lmm_system_t network_maxmin_system = NULL;
  16 static void (*network_solve) (lmm_system_t) = NULL;
  17
  18 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  19 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  20 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  21
  22 double sg_tcp_gamma = 0.0;
  23 int sg_network_fullduplex = 0;
  24
  25
  26 /******************************************************************************/
  27 /*                           Factors callbacks                                */
  28 /******************************************************************************/
  29 static double constant_latency_factor(double size)
  30 {
  31   return sg_latency_factor;
  32 }
  33
  34 static double constant_bandwidth_factor(double size)
  35 {
  36   return sg_bandwidth_factor;
  37 }
  38
  39 static double constant_bandwidth_constraint(double rate, double bound,
  40                                             double size)
  41 {
  42   return rate;
  43 }
  44
  45 /**********************/
  46 /*   SMPI callbacks   */
  47 /**********************/
  48 static double smpi_latency_factor(double size)
  49 {
  50   /* 1 B <= size <= 1 KiB */
  51   if (size <= 1024.0) {
  52     return 1.0056;
  53   }
  54
  55   /* 2 KiB <= size <= 32 KiB */
  56   if (size <= 32768.0) {
  57     return 1.8805;
  58   }
  59
  60   /* 64 KiB <= size <= 4 MiB */
  61   return 22.7111;
  62 }
  63
  64 static double smpi_bandwidth_factor(double size)
  65 {
  66   /* 1 B <= size <= 1 KiB */
  67   if (size <= 1024.0) {
  68     return 0.2758;
  69   }
  70
  71   /* 2 KiB <= size <= 32 KiB */
  72   if (size <= 32768.0) {
  73     return 0.5477;
  74   }
  75
  76   /* 64 KiB <= size <= 4 MiB */
  77   return 0.9359;
  78 }
  79
  80 static double smpi_bandwidth_constraint(double rate, double bound,
  81                                         double size)
  82 {
  83   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
  84 }
  85
  86
  87 static double (*latency_factor_callback) (double) =
  88     &constant_latency_factor;
  89 static double (*bandwidth_factor_callback) (double) =
  90     &constant_bandwidth_factor;
  91 static double (*bandwidth_constraint_callback) (double, double, double) =
  92     &constant_bandwidth_constraint;
  93
  94
  95 static link_CM02_t net_link_new(char *name,
  96                                 double bw_initial,
  97                                 tmgr_trace_t bw_trace,
  98                                 double lat_initial,
  99                                 tmgr_trace_t lat_trace,
 100                                 e_surf_resource_state_t
 101                                 state_initial,
 102                                 tmgr_trace_t state_trace,
 103                                 e_surf_link_sharing_policy_t
 104                                 policy, xbt_dict_t properties)
 105 {
 106   link_CM02_t nw_link = (link_CM02_t)
 107       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 108                             surf_network_model, name, properties,
 109                             network_maxmin_system,
 110                             sg_bandwidth_factor * bw_initial,
 111                             history,
 112                             state_initial, state_trace,
 113                             bw_initial, bw_trace);
 114
 115   xbt_assert1(!xbt_dict_get_or_null
 116               (surf_network_model->resource_set, name),
 117               "Link '%s' declared several times in the platform file.",
 118               name);
 119
 120   nw_link->lat_current = lat_initial;
 121   if (lat_trace)
 122     nw_link->lat_event =
 123         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 124
 125   if (policy == SURF_LINK_FATPIPE)
 126     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 127
 128   xbt_dict_set(surf_network_model->resource_set, name, nw_link,
 129                surf_resource_free);
 130 #ifdef HAVE_TRACING
 131   TRACE_surf_link_declaration(nw_link, name, bw_initial, lat_initial);
 132 #endif
 133
 134   return nw_link;
 135 }
 136
 137 static void net_parse_link_init(void)
 138 {
 139   char *name_link;
 140   double bw_initial;
 141   tmgr_trace_t bw_trace;
 142   double lat_initial;
 143   tmgr_trace_t lat_trace;
 144   e_surf_resource_state_t state_initial_link = SURF_RESOURCE_ON;
 145   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 146   tmgr_trace_t state_trace;
 147
 148   name_link = xbt_strdup(A_surfxml_link_id);
 149   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 150   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
 151   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 152   lat_trace = tmgr_trace_new(A_surfxml_link_latency_file);
 153
 154   xbt_assert0((A_surfxml_link_state == A_surfxml_link_state_ON)
 155               || (A_surfxml_link_state ==
 156                   A_surfxml_link_state_OFF), "Invalid state");
 157   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 158     state_initial_link = SURF_RESOURCE_ON;
 159   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
 160     state_initial_link = SURF_RESOURCE_OFF;
 161
 162   if (A_surfxml_link_sharing_policy ==
 163       A_surfxml_link_sharing_policy_SHARED)
 164     policy_initial_link = SURF_LINK_SHARED;
 165   else if (A_surfxml_link_sharing_policy ==
 166            A_surfxml_link_sharing_policy_FATPIPE)
 167     policy_initial_link = SURF_LINK_FATPIPE;
 168
 169   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 170
 171   net_link_new(name_link, bw_initial, bw_trace,
 172                lat_initial, lat_trace, state_initial_link, state_trace,
 173                policy_initial_link, xbt_dict_new());
 174
 175 }
 176
 177 static void net_create_resource(char *name,
 178                                 double bw_initial,
 179                                 tmgr_trace_t bw_trace,
 180                                 double lat_initial,
 181                                 tmgr_trace_t lat_trace,
 182                                 e_surf_resource_state_t
 183                                 state_initial,
 184                                 tmgr_trace_t state_trace,
 185                                 e_surf_link_sharing_policy_t policy,
 186                                 xbt_dict_t properties)
 187 {
 188   net_link_new(name, bw_initial, bw_trace,
 189                lat_initial, lat_trace, state_initial, state_trace,
 190                policy, xbt_dict_new());
 191 }
 192
 193 static void net_add_traces(void)
 194 {
 195   xbt_dict_cursor_t cursor = NULL;
 196   char *trace_name, *elm;
 197
 198   static int called = 0;
 199   if (called)
 200     return;
 201   called = 1;
 202
 203   /* connect all traces relative to network */
 204   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 205     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 206     link_CM02_t link =
 207         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 208
 209     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 210                 trace_name, elm);
 211     xbt_assert2(trace,
 212                 "Cannot connect trace %s to link %s: trace undefined",
 213                 trace_name, elm);
 214
 215     link->lmm_resource.state_event =
 216         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 217   }
 218
 219   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 220     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 221     link_CM02_t link =
 222         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 223
 224     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 225                 trace_name, elm);
 226     xbt_assert2(trace,
 227                 "Cannot connect trace %s to link %s: trace undefined",
 228                 trace_name, elm);
 229
 230     link->lmm_resource.power.event =
 231         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 232   }
 233
 234   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 235     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 236     link_CM02_t link =
 237         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 238
 239     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 240                 trace_name, elm);
 241     xbt_assert2(trace,
 242                 "Cannot connect trace %s to link %s: trace undefined",
 243                 trace_name, elm);
 244
 245     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 246   }
 247 }
 248
 249 static void net_define_callbacks(const char *file)
 250 {
 251   /* Figuring out the network links */
 252   surfxml_add_callback(STag_surfxml_link_cb_list, &net_parse_link_init);
 253   surfxml_add_callback(ETag_surfxml_platform_cb_list, &net_add_traces);
 254 }
 255
 256 static int net_resource_used(void *resource_id)
 257 {
 258   return lmm_constraint_used(network_maxmin_system,
 259                              ((surf_resource_lmm_t)
 260                               resource_id)->constraint);
 261 }
 262
 263 static int net_action_unref(surf_action_t action)
 264 {
 265   action->refcount--;
 266   if (!action->refcount) {
 267     xbt_swag_remove(action, action->state_set);
 268     if (((surf_action_network_CM02_t) action)->variable)
 269       lmm_variable_free(network_maxmin_system,
 270                         ((surf_action_network_CM02_t) action)->variable);
 271 #ifdef HAVE_TRACING
 272     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 273     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 274     if (action->category)
 275       xbt_free(action->category);
 276 #endif
 277     free(action);
 278     return 1;
 279   }
 280   return 0;
 281 }
 282
 283 static void net_action_cancel(surf_action_t action)
 284 {
 285   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 286 }
 287
 288 void net_action_recycle(surf_action_t action)
 289 {
 290   return;
 291 }
 292
 293 #ifdef HAVE_LATENCY_BOUND_TRACKING
 294 int net_get_link_latency_limited(surf_action_t action)
 295 {
 296   return action->latency_limited;
 297 }
 298 #endif
 299
 300 double net_action_get_remains(surf_action_t action)
 301 {
 302   return action->remains;
 303 }
 304
 305 static double net_share_resources(double now)
 306 {
 307   s_surf_action_network_CM02_t s_action;
 308   surf_action_network_CM02_t action = NULL;
 309   xbt_swag_t running_actions =
 310       surf_network_model->states.running_action_set;
 311   double min;
 312
 313   min = generic_maxmin_share_resources(running_actions,
 314                                        xbt_swag_offset(s_action,
 315                                                        variable),
 316                                        network_maxmin_system,
 317                                        network_solve);
 318
 319 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 320
 321   xbt_swag_foreach(action, running_actions) {
 322 #ifdef HAVE_LATENCY_BOUND_TRACKING
 323     if (lmm_is_variable_limited_by_latency(action->variable)) {
 324       (action->generic_action).latency_limited = 1;
 325     } else {
 326       (action->generic_action).latency_limited = 0;
 327     }
 328 #endif
 329     if (action->latency > 0) {
 330       if (min < 0)
 331         min = action->latency;
 332       else if (action->latency < min)
 333         min = action->latency;
 334     }
 335   }
 336
 337   return min;
 338 }
 339
 340 static void net_update_actions_state(double now, double delta)
 341 {
 342   double deltap = 0.0;
 343   surf_action_network_CM02_t action = NULL;
 344   surf_action_network_CM02_t next_action = NULL;
 345   xbt_swag_t running_actions =
 346       surf_network_model->states.running_action_set;
 347   /*
 348      xbt_swag_t failed_actions =
 349      surf_network_model->states.failed_action_set;
 350    */
 351
 352   xbt_swag_foreach_safe(action, next_action, running_actions) {
 353     deltap = delta;
 354     if (action->latency > 0) {
 355       if (action->latency > deltap) {
 356         double_update(&(action->latency), deltap);
 357         deltap = 0.0;
 358       } else {
 359         double_update(&(deltap), action->latency);
 360         action->latency = 0.0;
 361       }
 362       if ((action->latency == 0.0) && !(action->suspended))
 363         lmm_update_variable_weight(network_maxmin_system, action->variable,
 364                                    action->weight);
 365     }
 366 #ifdef HAVE_TRACING
 367     xbt_dynar_t route =
 368         global_routing->get_route(action->src_name, action->dst_name);
 369     link_CM02_t link;
 370     unsigned int i;
 371     xbt_dynar_foreach(route, i, link) {
 372       TRACE_surf_link_set_utilization(link,
 373                                       action->generic_action.data,
 374                                       (surf_action_t) action,
 375                                       lmm_variable_getvalue
 376                                       (action->variable), now - delta,
 377                                       delta);
 378     }
 379 #endif
 380     double_update(&(action->generic_action.remains),
 381                   lmm_variable_getvalue(action->variable) * deltap);
 382     if (action->generic_action.max_duration != NO_MAX_DURATION)
 383       double_update(&(action->generic_action.max_duration), delta);
 384
 385     if ((action->generic_action.remains <= 0) &&
 386         (lmm_get_variable_weight(action->variable) > 0)) {
 387       action->generic_action.finish = surf_get_clock();
 388       surf_network_model->action_state_set((surf_action_t) action,
 389                                            SURF_ACTION_DONE);
 390     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 391                && (action->generic_action.max_duration <= 0)) {
 392       action->generic_action.finish = surf_get_clock();
 393       surf_network_model->action_state_set((surf_action_t) action,
 394                                            SURF_ACTION_DONE);
 395     }
 396   }
 397
 398   return;
 399 }
 400
 401 static void net_update_resource_state(void *id,
 402                                       tmgr_trace_event_t event_type,
 403                                       double value, double date)
 404 {
 405   link_CM02_t nw_link = id;
 406   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 407   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 408   /*     value, event_type); */
 409
 410   if (event_type == nw_link->lmm_resource.power.event) {
 411     double delta =
 412         sg_weight_S_parameter / value - sg_weight_S_parameter /
 413         (nw_link->lmm_resource.power.peak *
 414          nw_link->lmm_resource.power.scale);
 415     lmm_variable_t var = NULL;
 416     lmm_element_t elem = NULL;
 417     surf_action_network_CM02_t action = NULL;
 418
 419     nw_link->lmm_resource.power.peak = value;
 420     lmm_update_constraint_bound(network_maxmin_system,
 421                                 nw_link->lmm_resource.constraint,
 422                                 sg_bandwidth_factor *
 423                                 (nw_link->lmm_resource.power.peak *
 424                                  nw_link->lmm_resource.power.scale));
 425 #ifdef HAVE_TRACING
 426     TRACE_surf_link_set_bandwidth(date, nw_link,
 427                                   sg_bandwidth_factor *
 428                                   (nw_link->lmm_resource.power.peak *
 429                                    nw_link->lmm_resource.power.scale));
 430 #endif
 431     if (sg_weight_S_parameter > 0) {
 432       while ((var = lmm_get_var_from_cnst
 433               (network_maxmin_system, nw_link->lmm_resource.constraint,
 434                &elem))) {
 435         action = lmm_variable_id(var);
 436         action->weight += delta;
 437         if (!(action->suspended))
 438           lmm_update_variable_weight(network_maxmin_system,
 439                                      action->variable, action->weight);
 440       }
 441     }
 442     if (tmgr_trace_event_free(event_type))
 443       nw_link->lmm_resource.power.event = NULL;
 444   } else if (event_type == nw_link->lat_event) {
 445     double delta = value - nw_link->lat_current;
 446     lmm_variable_t var = NULL;
 447     lmm_element_t elem = NULL;
 448     surf_action_network_CM02_t action = NULL;
 449
 450     nw_link->lat_current = value;
 451     while ((var = lmm_get_var_from_cnst
 452             (network_maxmin_system, nw_link->lmm_resource.constraint,
 453              &elem))) {
 454       action = lmm_variable_id(var);
 455       action->lat_current += delta;
 456       action->weight += delta;
 457       if (action->rate < 0)
 458         lmm_update_variable_bound(network_maxmin_system, action->variable,
 459                                   sg_tcp_gamma / (2.0 *
 460                                                   action->lat_current));
 461       else {
 462         lmm_update_variable_bound(network_maxmin_system, action->variable,
 463                                   min(action->rate,
 464                                       sg_tcp_gamma / (2.0 *
 465                                                       action->lat_current)));
 466
 467         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 468           INFO0("Flow is limited BYBANDWIDTH");
 469         } else {
 470           INFO1("Flow is limited BYLATENCY, latency of flow is %f",
 471                 action->lat_current);
 472         }
 473       }
 474       if (!(action->suspended))
 475         lmm_update_variable_weight(network_maxmin_system, action->variable,
 476                                    action->weight);
 477
 478     }
 479     if (tmgr_trace_event_free(event_type))
 480       nw_link->lat_event = NULL;
 481   } else if (event_type == nw_link->lmm_resource.state_event) {
 482     if (value > 0)
 483       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 484     else {
 485       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 486       lmm_variable_t var = NULL;
 487       lmm_element_t elem = NULL;
 488
 489       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 490       while ((var = lmm_get_var_from_cnst
 491               (network_maxmin_system, cnst, &elem))) {
 492         surf_action_t action = lmm_variable_id(var);
 493
 494         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 495             surf_action_state_get(action) == SURF_ACTION_READY) {
 496           action->finish = date;
 497           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 498         }
 499       }
 500     }
 501     if (tmgr_trace_event_free(event_type))
 502       nw_link->lmm_resource.state_event = NULL;
 503   } else {
 504     CRITICAL0("Unknown event ! \n");
 505     xbt_abort();
 506   }
 507
 508   return;
 509 }
 510
 511
 512 static surf_action_t net_communicate(const char *src_name,
 513                                      const char *dst_name, double size,
 514                                      double rate)
 515 {
 516   unsigned int i;
 517   link_CM02_t link;
 518   int failed = 0;
 519   surf_action_network_CM02_t action = NULL;
 520   double bandwidth_bound;
 521   /* LARGE PLATFORMS HACK:
 522      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 523      Use the cluster_id for ->id */
 524
 525   xbt_dynar_t route = global_routing->get_route(src_name, dst_name);
 526   xbt_dynar_t back_route = NULL;
 527   int constraints_per_variable = 0;
 528
 529   if (sg_network_fullduplex == 1) {
 530     back_route = global_routing->get_route(src_name, dst_name);
 531   }
 532
 533   /* LARGE PLATFORMS HACK:
 534      total_route_size = route_size + src->link_nb + dst->nb */
 535
 536   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 537   /* LARGE PLATFORMS HACK:
 538      assert on total_route_size */
 539   xbt_assert2(xbt_dynar_length(route),
 540               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 541               src_name, dst_name);
 542
 543   xbt_dynar_foreach(route, i, link) {
 544     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 545       failed = 1;
 546       break;
 547     }
 548   }
 549   action =
 550       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 551                       surf_network_model, failed);
 552 #ifdef HAVE_LATENCY_BOUND_TRACKING
 553   (action->generic_action).latency_limited = 0;
 554 #endif
 555
 556   xbt_swag_insert(action, action->generic_action.state_set);
 557   action->rate = rate;
 558
 559   action->latency = 0.0;
 560   action->weight = 0.0;
 561   bandwidth_bound = -1.0;
 562   xbt_dynar_foreach(route, i, link) {
 563     action->latency += link->lat_current;
 564     action->weight +=
 565         link->lat_current +
 566         sg_weight_S_parameter /
 567         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 568     if (bandwidth_bound < 0.0)
 569       bandwidth_bound =
 570           (*bandwidth_factor_callback) (size) *
 571           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 572     else
 573       bandwidth_bound =
 574           min(bandwidth_bound,
 575               (*bandwidth_factor_callback) (size) *
 576               (link->lmm_resource.power.peak *
 577                link->lmm_resource.power.scale));
 578   }
 579   /* LARGE PLATFORMS HACK:
 580      Add src->link and dst->link latencies */
 581   action->lat_current = action->latency;
 582   action->latency *= (*latency_factor_callback) (size);
 583   action->rate =
 584       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 585                                         size);
 586
 587   /* LARGE PLATFORMS HACK:
 588      lmm_variable_new(..., total_route_size) */
 589   if (back_route != NULL) {
 590     constraints_per_variable =
 591         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 592   } else {
 593     constraints_per_variable = xbt_dynar_length(route);
 594   }
 595
 596   if (action->latency > 0)
 597     action->variable =
 598         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 599                          constraints_per_variable);
 600   else
 601     action->variable =
 602         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 603                          constraints_per_variable);
 604
 605   if (action->rate < 0) {
 606     if (action->lat_current > 0)
 607       lmm_update_variable_bound(network_maxmin_system, action->variable,
 608                                 sg_tcp_gamma / (2.0 *
 609                                                 action->lat_current));
 610     else
 611       lmm_update_variable_bound(network_maxmin_system, action->variable,
 612                                 -1.0);
 613   } else {
 614     if (action->lat_current > 0)
 615       lmm_update_variable_bound(network_maxmin_system, action->variable,
 616                                 min(action->rate,
 617                                     sg_tcp_gamma / (2.0 *
 618                                                     action->lat_current)));
 619     else
 620       lmm_update_variable_bound(network_maxmin_system, action->variable,
 621                                 action->rate);
 622   }
 623
 624   xbt_dynar_foreach(route, i, link) {
 625     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 626                action->variable, 1.0);
 627   }
 628
 629   if (sg_network_fullduplex == 1) {
 630     DEBUG1("Fullduplex active adding backward flow using 5%c", '%');
 631     xbt_dynar_foreach(back_route, i, link) {
 632       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 633                  action->variable, .05);
 634     }
 635   }
 636   /* LARGE PLATFORMS HACK:
 637      expand also with src->link and dst->link */
 638 #ifdef HAVE_TRACING
 639   action->src_name = xbt_new(char, strlen(src_name) + 1);
 640   strncpy(action->src_name, src_name, strlen(src_name) + 1);
 641
 642   action->dst_name = xbt_new(char, strlen(dst_name) + 1);
 643   strncpy(action->dst_name, dst_name, strlen(dst_name) + 1);
 644 #endif
 645
 646   XBT_OUT;
 647
 648   return (surf_action_t) action;
 649 }
 650
 651 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 652 {
 653   return global_routing->get_route(src, dst);
 654 }
 655
 656 static double net_get_link_bandwidth(const void *link)
 657 {
 658   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 659   return lmm->power.peak * lmm->power.scale;
 660 }
 661
 662 static double net_get_link_latency(const void *link)
 663 {
 664   return ((link_CM02_t) link)->lat_current;
 665 }
 666
 667 static int net_link_shared(const void *link)
 668 {
 669   return
 670       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 671 }
 672
 673 static void net_action_suspend(surf_action_t action)
 674 {
 675   ((surf_action_network_CM02_t) action)->suspended = 1;
 676   lmm_update_variable_weight(network_maxmin_system,
 677                              ((surf_action_network_CM02_t)
 678                               action)->variable, 0.0);
 679 }
 680
 681 static void net_action_resume(surf_action_t action)
 682 {
 683   if (((surf_action_network_CM02_t) action)->suspended) {
 684     lmm_update_variable_weight(network_maxmin_system,
 685                                ((surf_action_network_CM02_t)
 686                                 action)->variable,
 687                                ((surf_action_network_CM02_t)
 688                                 action)->weight);
 689     ((surf_action_network_CM02_t) action)->suspended = 0;
 690   }
 691 }
 692
 693 static int net_action_is_suspended(surf_action_t action)
 694 {
 695   return ((surf_action_network_CM02_t) action)->suspended;
 696 }
 697
 698 void net_action_set_max_duration(surf_action_t action, double duration)
 699 {
 700   action->max_duration = duration;
 701 }
 702
 703 static void net_finalize(void)
 704 {
 705   surf_model_exit(surf_network_model);
 706   surf_network_model = NULL;
 707
 708   global_routing->finalize();
 709
 710   lmm_system_free(network_maxmin_system);
 711   network_maxmin_system = NULL;
 712 }
 713
 714 static void surf_network_model_init_internal(void)
 715 {
 716   surf_network_model = surf_model_init();
 717
 718   surf_network_model->name = "network";
 719   surf_network_model->action_unref = net_action_unref;
 720   surf_network_model->action_cancel = net_action_cancel;
 721   surf_network_model->action_recycle = net_action_recycle;
 722   surf_network_model->get_remains = net_action_get_remains;
 723 #ifdef HAVE_LATENCY_BOUND_TRACKING
 724   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 725 #endif
 726
 727   surf_network_model->model_private->resource_used = net_resource_used;
 728   surf_network_model->model_private->share_resources = net_share_resources;
 729   surf_network_model->model_private->update_actions_state =
 730       net_update_actions_state;
 731   surf_network_model->model_private->update_resource_state =
 732       net_update_resource_state;
 733   surf_network_model->model_private->finalize = net_finalize;
 734
 735   surf_network_model->suspend = net_action_suspend;
 736   surf_network_model->resume = net_action_resume;
 737   surf_network_model->is_suspended = net_action_is_suspended;
 738   surf_cpu_model->set_max_duration = net_action_set_max_duration;
 739
 740   surf_network_model->extension.network.communicate = net_communicate;
 741   surf_network_model->extension.network.get_route = net_get_route;
 742   surf_network_model->extension.network.get_link_bandwidth =
 743       net_get_link_bandwidth;
 744   surf_network_model->extension.network.get_link_latency =
 745       net_get_link_latency;
 746   surf_network_model->extension.network.link_shared = net_link_shared;
 747   surf_network_model->extension.network.add_traces = net_add_traces;
 748   surf_network_model->extension.network.create_resource =
 749       net_create_resource;
 750
 751   if (!network_maxmin_system)
 752     network_maxmin_system = lmm_system_new();
 753
 754   routing_model_create(sizeof(link_CM02_t),
 755                        net_link_new(xbt_strdup("__loopback__"),
 756                                     498000000, NULL, 0.000015, NULL,
 757                                     SURF_RESOURCE_ON, NULL,
 758                                     SURF_LINK_FATPIPE, NULL));
 759 }
 760
 761
 762
 763 /************************************************************************/
 764 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 765 /************************************************************************/
 766 void surf_network_model_init_SMPI(const char *filename)
 767 {
 768
 769   if (surf_network_model)
 770     return;
 771   surf_network_model_init_internal();
 772   latency_factor_callback = &smpi_latency_factor;
 773   bandwidth_factor_callback = &smpi_bandwidth_factor;
 774   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 775   net_define_callbacks(filename);
 776   xbt_dynar_push(model_list, &surf_network_model);
 777   network_solve = lmm_solve;
 778
 779   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 780
 781   update_model_description(surf_network_model_description,
 782                            "SMPI", surf_network_model);
 783 }
 784
 785 /************************************************************************/
 786 /* New model based on optimizations discussed during this thesis        */
 787 /************************************************************************/
 788 void surf_network_model_init_LegrandVelho(const char *filename)
 789 {
 790
 791   if (surf_network_model)
 792     return;
 793   surf_network_model_init_internal();
 794   net_define_callbacks(filename);
 795   xbt_dynar_push(model_list, &surf_network_model);
 796   network_solve = lmm_solve;
 797
 798   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 799   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 800                             0.92);
 801   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 802
 803   update_model_description(surf_network_model_description,
 804                            "LV08", surf_network_model);
 805 }
 806
 807 /***************************************************************************/
 808 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 809 /***************************************************************************/
 810 /* @TechReport{      rr-lip2002-40, */
 811 /*   author        = {Henri Casanova and Loris Marchal}, */
 812 /*   institution   = {LIP}, */
 813 /*   title         = {A Network Model for Simulation of Grid Application}, */
 814 /*   number        = {2002-40}, */
 815 /*   month         = {oct}, */
 816 /*   year          = {2002} */
 817 /* } */
 818 void surf_network_model_init_CM02(const char *filename)
 819 {
 820
 821   if (surf_network_model)
 822     return;
 823   surf_network_model_init_internal();
 824   net_define_callbacks(filename);
 825   xbt_dynar_push(model_list, &surf_network_model);
 826   network_solve = lmm_solve;
 827
 828   update_model_description(surf_network_model_description,
 829                            "CM02", surf_network_model);
 830 }
 831
 832 void surf_network_model_init_Reno(const char *filename)
 833 {
 834   if (surf_network_model)
 835     return;
 836   surf_network_model_init_internal();
 837   net_define_callbacks(filename);
 838
 839   xbt_dynar_push(model_list, &surf_network_model);
 840   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 841                                     func_reno_fpi);
 842   network_solve = lagrange_solve;
 843
 844   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 845   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 846                             0.92);
 847   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 848
 849   update_model_description(surf_network_model_description,
 850                            "Reno", surf_network_model);
 851 }
 852
 853
 854 void surf_network_model_init_Reno2(const char *filename)
 855 {
 856   if (surf_network_model)
 857     return;
 858   surf_network_model_init_internal();
 859   net_define_callbacks(filename);
 860
 861   xbt_dynar_push(model_list, &surf_network_model);
 862   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 863                                     func_reno2_fpi);
 864   network_solve = lagrange_solve;
 865
 866   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 867   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 868                             0.92);
 869   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
 870                             8775);
 871
 872   update_model_description(surf_network_model_description,
 873                            "Reno2", surf_network_model);
 874 }
 875
 876 void surf_network_model_init_Vegas(const char *filename)
 877 {
 878   if (surf_network_model)
 879     return;
 880   surf_network_model_init_internal();
 881   net_define_callbacks(filename);
 882
 883   xbt_dynar_push(model_list, &surf_network_model);
 884   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 885                                     func_vegas_fpi);
 886   network_solve = lagrange_solve;
 887
 888   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 889   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 890                             0.92);
 891   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 892
 893   update_model_description(surf_network_model_description,
 894                            "Vegas", surf_network_model);
 895 }