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   DEBUG0("link_CM02");
 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 == A_surfxml_link_sharing_policy_SHARED)
 163     policy_initial_link = SURF_LINK_SHARED;
 164   else
 165           {
 166           if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FATPIPE)
 167                   policy_initial_link = SURF_LINK_FATPIPE;
 168           else if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FULLDUPLEX)
 169                   policy_initial_link = SURF_LINK_FULLDUPLEX;
 170           }
 171
 172   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 173
 174   if(policy_initial_link == SURF_LINK_FULLDUPLEX)
 175   {
 176           net_link_new(bprintf("%s_UP",name_link), bw_initial, bw_trace,
 177                        lat_initial, lat_trace, state_initial_link, state_trace,
 178                        policy_initial_link, xbt_dict_new());
 179           net_link_new(bprintf("%s_DOWN",name_link), bw_initial, bw_trace,
 180                        lat_initial, lat_trace, state_initial_link, state_trace,
 181                        policy_initial_link, xbt_dict_new());
 182   }
 183   else
 184   {
 185           net_link_new(name_link, bw_initial, bw_trace,
 186                        lat_initial, lat_trace, state_initial_link, state_trace,
 187                        policy_initial_link, xbt_dict_new());
 188   }
 189
 190 }
 191
 192 static void net_create_resource(char *name,
 193                                 double bw_initial,
 194                                 tmgr_trace_t bw_trace,
 195                                 double lat_initial,
 196                                 tmgr_trace_t lat_trace,
 197                                 e_surf_resource_state_t
 198                                 state_initial,
 199                                 tmgr_trace_t state_trace,
 200                                 e_surf_link_sharing_policy_t policy,
 201                                 xbt_dict_t properties)
 202 {
 203   net_link_new(name, bw_initial, bw_trace,
 204                lat_initial, lat_trace, state_initial, state_trace,
 205                policy, xbt_dict_new());
 206 }
 207
 208 static void net_add_traces(void)
 209 {
 210   xbt_dict_cursor_t cursor = NULL;
 211   char *trace_name, *elm;
 212
 213   static int called = 0;
 214   if (called)
 215     return;
 216   called = 1;
 217
 218   /* connect all traces relative to network */
 219   xbt_dict_foreach(trace_connect_list_link_avail, 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.state_event =
 231         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 232   }
 233
 234   xbt_dict_foreach(trace_connect_list_bandwidth, 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->lmm_resource.power.event =
 246         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 247   }
 248
 249   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 250     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 251     link_CM02_t link =
 252         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 253
 254     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 255                 trace_name, elm);
 256     xbt_assert2(trace,
 257                 "Cannot connect trace %s to link %s: trace undefined",
 258                 trace_name, elm);
 259
 260     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 261   }
 262 }
 263
 264 static void net_define_callbacks(const char *file)
 265 {
 266   /* Figuring out the network links */
 267   surfxml_add_callback(STag_surfxml_link_cb_list, &net_parse_link_init);
 268   surfxml_add_callback(ETag_surfxml_platform_cb_list, &net_add_traces);
 269 }
 270
 271 static int net_resource_used(void *resource_id)
 272 {
 273   return lmm_constraint_used(network_maxmin_system,
 274                              ((surf_resource_lmm_t)
 275                               resource_id)->constraint);
 276 }
 277
 278 static int net_action_unref(surf_action_t action)
 279 {
 280   action->refcount--;
 281   if (!action->refcount) {
 282     xbt_swag_remove(action, action->state_set);
 283     if (((surf_action_network_CM02_t) action)->variable)
 284       lmm_variable_free(network_maxmin_system,
 285                         ((surf_action_network_CM02_t) action)->variable);
 286 #ifdef HAVE_TRACING
 287     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 288     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 289     if (action->category)
 290       xbt_free(action->category);
 291 #endif
 292     free(action);
 293     return 1;
 294   }
 295   return 0;
 296 }
 297
 298 static void net_action_cancel(surf_action_t action)
 299 {
 300   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 301 }
 302
 303 void net_action_recycle(surf_action_t action)
 304 {
 305   return;
 306 }
 307
 308 #ifdef HAVE_LATENCY_BOUND_TRACKING
 309 int net_get_link_latency_limited(surf_action_t action)
 310 {
 311   return action->latency_limited;
 312 }
 313 #endif
 314
 315 double net_action_get_remains(surf_action_t action)
 316 {
 317   return action->remains;
 318 }
 319
 320 static double net_share_resources(double now)
 321 {
 322   s_surf_action_network_CM02_t s_action;
 323   surf_action_network_CM02_t action = NULL;
 324   xbt_swag_t running_actions =
 325       surf_network_model->states.running_action_set;
 326   double min;
 327
 328   min = generic_maxmin_share_resources(running_actions,
 329                                        xbt_swag_offset(s_action,
 330                                                        variable),
 331                                        network_maxmin_system,
 332                                        network_solve);
 333
 334 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 335
 336   xbt_swag_foreach(action, running_actions) {
 337 #ifdef HAVE_LATENCY_BOUND_TRACKING
 338     if (lmm_is_variable_limited_by_latency(action->variable)) {
 339       (action->generic_action).latency_limited = 1;
 340     } else {
 341       (action->generic_action).latency_limited = 0;
 342     }
 343 #endif
 344     if (action->latency > 0) {
 345       if (min < 0)
 346         min = action->latency;
 347       else if (action->latency < min)
 348         min = action->latency;
 349     }
 350   }
 351
 352   return min;
 353 }
 354
 355 static void net_update_actions_state(double now, double delta)
 356 {
 357   double deltap = 0.0;
 358   surf_action_network_CM02_t action = NULL;
 359   surf_action_network_CM02_t next_action = NULL;
 360   xbt_swag_t running_actions =
 361       surf_network_model->states.running_action_set;
 362   /*
 363      xbt_swag_t failed_actions =
 364      surf_network_model->states.failed_action_set;
 365    */
 366
 367   xbt_swag_foreach_safe(action, next_action, running_actions) {
 368     deltap = delta;
 369     if (action->latency > 0) {
 370       if (action->latency > deltap) {
 371         double_update(&(action->latency), deltap);
 372         deltap = 0.0;
 373       } else {
 374         double_update(&(deltap), action->latency);
 375         action->latency = 0.0;
 376       }
 377       if ((action->latency == 0.0) && !(action->suspended))
 378         lmm_update_variable_weight(network_maxmin_system, action->variable,
 379                                    action->weight);
 380     }
 381 #ifdef HAVE_TRACING
 382     xbt_dynar_t route =
 383         global_routing->get_route(action->src_name, action->dst_name);
 384     link_CM02_t link;
 385     unsigned int i;
 386     xbt_dynar_foreach(route, i, link) {
 387       TRACE_surf_link_set_utilization(link,
 388                                       action->generic_action.data,
 389                                       (surf_action_t) action,
 390                                       lmm_variable_getvalue
 391                                       (action->variable), now - delta,
 392                                       delta);
 393     }
 394 #endif
 395     double_update(&(action->generic_action.remains),
 396                   lmm_variable_getvalue(action->variable) * deltap);
 397     if (action->generic_action.max_duration != NO_MAX_DURATION)
 398       double_update(&(action->generic_action.max_duration), delta);
 399
 400     if ((action->generic_action.remains <= 0) &&
 401         (lmm_get_variable_weight(action->variable) > 0)) {
 402       action->generic_action.finish = surf_get_clock();
 403       surf_network_model->action_state_set((surf_action_t) action,
 404                                            SURF_ACTION_DONE);
 405     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 406                && (action->generic_action.max_duration <= 0)) {
 407       action->generic_action.finish = surf_get_clock();
 408       surf_network_model->action_state_set((surf_action_t) action,
 409                                            SURF_ACTION_DONE);
 410     }
 411   }
 412
 413   return;
 414 }
 415
 416 static void net_update_resource_state(void *id,
 417                                       tmgr_trace_event_t event_type,
 418                                       double value, double date)
 419 {
 420   link_CM02_t nw_link = id;
 421   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 422   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 423   /*     value, event_type); */
 424
 425   if (event_type == nw_link->lmm_resource.power.event) {
 426     double delta =
 427         sg_weight_S_parameter / value - sg_weight_S_parameter /
 428         (nw_link->lmm_resource.power.peak *
 429          nw_link->lmm_resource.power.scale);
 430     lmm_variable_t var = NULL;
 431     lmm_element_t elem = NULL;
 432     surf_action_network_CM02_t action = NULL;
 433
 434     nw_link->lmm_resource.power.peak = value;
 435     lmm_update_constraint_bound(network_maxmin_system,
 436                                 nw_link->lmm_resource.constraint,
 437                                 sg_bandwidth_factor *
 438                                 (nw_link->lmm_resource.power.peak *
 439                                  nw_link->lmm_resource.power.scale));
 440 #ifdef HAVE_TRACING
 441     TRACE_surf_link_set_bandwidth(date, nw_link,
 442                                   sg_bandwidth_factor *
 443                                   (nw_link->lmm_resource.power.peak *
 444                                    nw_link->lmm_resource.power.scale));
 445 #endif
 446     if (sg_weight_S_parameter > 0) {
 447       while ((var = lmm_get_var_from_cnst
 448               (network_maxmin_system, nw_link->lmm_resource.constraint,
 449                &elem))) {
 450         action = lmm_variable_id(var);
 451         action->weight += delta;
 452         if (!(action->suspended))
 453           lmm_update_variable_weight(network_maxmin_system,
 454                                      action->variable, action->weight);
 455       }
 456     }
 457     if (tmgr_trace_event_free(event_type))
 458       nw_link->lmm_resource.power.event = NULL;
 459   } else if (event_type == nw_link->lat_event) {
 460     double delta = value - nw_link->lat_current;
 461     lmm_variable_t var = NULL;
 462     lmm_element_t elem = NULL;
 463     surf_action_network_CM02_t action = NULL;
 464
 465     nw_link->lat_current = value;
 466     while ((var = lmm_get_var_from_cnst
 467             (network_maxmin_system, nw_link->lmm_resource.constraint,
 468              &elem))) {
 469       action = lmm_variable_id(var);
 470       action->lat_current += delta;
 471       action->weight += delta;
 472       if (action->rate < 0)
 473         lmm_update_variable_bound(network_maxmin_system, action->variable,
 474                                   sg_tcp_gamma / (2.0 *
 475                                                   action->lat_current));
 476       else {
 477         lmm_update_variable_bound(network_maxmin_system, action->variable,
 478                                   min(action->rate,
 479                                       sg_tcp_gamma / (2.0 *
 480                                                       action->lat_current)));
 481
 482         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 483           INFO0("Flow is limited BYBANDWIDTH");
 484         } else {
 485           INFO1("Flow is limited BYLATENCY, latency of flow is %f",
 486                 action->lat_current);
 487         }
 488       }
 489       if (!(action->suspended))
 490         lmm_update_variable_weight(network_maxmin_system, action->variable,
 491                                    action->weight);
 492
 493     }
 494     if (tmgr_trace_event_free(event_type))
 495       nw_link->lat_event = NULL;
 496   } else if (event_type == nw_link->lmm_resource.state_event) {
 497     if (value > 0)
 498       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 499     else {
 500       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 501       lmm_variable_t var = NULL;
 502       lmm_element_t elem = NULL;
 503
 504       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 505       while ((var = lmm_get_var_from_cnst
 506               (network_maxmin_system, cnst, &elem))) {
 507         surf_action_t action = lmm_variable_id(var);
 508
 509         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 510             surf_action_state_get(action) == SURF_ACTION_READY) {
 511           action->finish = date;
 512           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 513         }
 514       }
 515     }
 516     if (tmgr_trace_event_free(event_type))
 517       nw_link->lmm_resource.state_event = NULL;
 518   } else {
 519     CRITICAL0("Unknown event ! \n");
 520     xbt_abort();
 521   }
 522
 523   return;
 524 }
 525
 526
 527 static surf_action_t net_communicate(const char *src_name,
 528                                      const char *dst_name, double size,
 529                                      double rate)
 530 {
 531   unsigned int i;
 532   link_CM02_t link;
 533   int failed = 0;
 534   surf_action_network_CM02_t action = NULL;
 535   double bandwidth_bound;
 536   /* LARGE PLATFORMS HACK:
 537      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 538      Use the cluster_id for ->id */
 539
 540   xbt_dynar_t back_route = NULL;
 541   int constraints_per_variable = 0;
 542   // I will need this route for some time so let's call get_route_no_cleanup
 543   xbt_dynar_t route = global_routing->get_route_no_cleanup(src_name, dst_name);
 544
 545
 546   if (sg_network_fullduplex == 1) {
 547     back_route = global_routing->get_route(dst_name, src_name);
 548   }
 549
 550   /* LARGE PLATFORMS HACK:
 551      total_route_size = route_size + src->link_nb + dst->nb */
 552
 553   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 554   /* LARGE PLATFORMS HACK:
 555      assert on total_route_size */
 556   xbt_assert2(xbt_dynar_length(route),
 557               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 558               src_name, dst_name);
 559
 560   xbt_dynar_foreach(route, i, link) {
 561     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 562       failed = 1;
 563       break;
 564     }
 565   }
 566   action =
 567       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 568                       surf_network_model, failed);
 569 #ifdef HAVE_LATENCY_BOUND_TRACKING
 570   (action->generic_action).latency_limited = 0;
 571 #endif
 572
 573   xbt_swag_insert(action, action->generic_action.state_set);
 574   action->rate = rate;
 575
 576   action->latency = 0.0;
 577   action->weight = 0.0;
 578   bandwidth_bound = -1.0;
 579   xbt_dynar_foreach(route, i, link) {
 580     action->latency += link->lat_current;
 581     action->weight +=
 582         link->lat_current +
 583         sg_weight_S_parameter /
 584         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 585     if (bandwidth_bound < 0.0)
 586       bandwidth_bound =
 587           (*bandwidth_factor_callback) (size) *
 588           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 589     else
 590       bandwidth_bound =
 591           min(bandwidth_bound,
 592               (*bandwidth_factor_callback) (size) *
 593               (link->lmm_resource.power.peak *
 594                link->lmm_resource.power.scale));
 595   }
 596   /* LARGE PLATFORMS HACK:
 597      Add src->link and dst->link latencies */
 598   action->lat_current = action->latency;
 599   action->latency *= (*latency_factor_callback) (size);
 600   action->rate =
 601       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 602                                         size);
 603
 604   /* LARGE PLATFORMS HACK:
 605      lmm_variable_new(..., total_route_size) */
 606   if (back_route != NULL) {
 607     constraints_per_variable =
 608         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 609   } else {
 610     constraints_per_variable = xbt_dynar_length(route);
 611   }
 612
 613   if (action->latency > 0)
 614     action->variable =
 615         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 616                          constraints_per_variable);
 617   else
 618     action->variable =
 619         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 620                          constraints_per_variable);
 621
 622   if (action->rate < 0) {
 623     if (action->lat_current > 0)
 624       lmm_update_variable_bound(network_maxmin_system, action->variable,
 625                                 sg_tcp_gamma / (2.0 *
 626                                                 action->lat_current));
 627     else
 628       lmm_update_variable_bound(network_maxmin_system, action->variable,
 629                                 -1.0);
 630   } else {
 631     if (action->lat_current > 0)
 632       lmm_update_variable_bound(network_maxmin_system, action->variable,
 633                                 min(action->rate,
 634                                     sg_tcp_gamma / (2.0 *
 635                                                     action->lat_current)));
 636     else
 637       lmm_update_variable_bound(network_maxmin_system, action->variable,
 638                                 action->rate);
 639   }
 640
 641   xbt_dynar_foreach(route, i, link) {
 642     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 643                action->variable, 1.0);
 644   }
 645
 646   if (sg_network_fullduplex == 1) {
 647     DEBUG1("Fullduplex active adding backward flow using 5%c", '%');
 648     xbt_dynar_foreach(back_route, i, link) {
 649       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 650                  action->variable, .05);
 651     }
 652   }
 653   /* LARGE PLATFORMS HACK:
 654      expand also with src->link and dst->link */
 655 #ifdef HAVE_TRACING
 656   action->src_name = xbt_new(char, strlen(src_name) + 1);
 657   strncpy(action->src_name, src_name, strlen(src_name) + 1);
 658
 659   action->dst_name = xbt_new(char, strlen(dst_name) + 1);
 660   strncpy(action->dst_name, dst_name, strlen(dst_name) + 1);
 661 #endif
 662
 663   xbt_dynar_free(&route);
 664   XBT_OUT;
 665
 666   return (surf_action_t) action;
 667 }
 668
 669 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 670 {
 671   return global_routing->get_route(src, dst);
 672 }
 673
 674 static double net_get_link_bandwidth(const void *link)
 675 {
 676   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 677   return lmm->power.peak * lmm->power.scale;
 678 }
 679
 680 static double net_get_link_latency(const void *link)
 681 {
 682   return ((link_CM02_t) link)->lat_current;
 683 }
 684
 685 static int net_link_shared(const void *link)
 686 {
 687   return
 688       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 689 }
 690
 691 static void net_action_suspend(surf_action_t action)
 692 {
 693   ((surf_action_network_CM02_t) action)->suspended = 1;
 694   lmm_update_variable_weight(network_maxmin_system,
 695                              ((surf_action_network_CM02_t)
 696                               action)->variable, 0.0);
 697 }
 698
 699 static void net_action_resume(surf_action_t action)
 700 {
 701   if (((surf_action_network_CM02_t) action)->suspended) {
 702     lmm_update_variable_weight(network_maxmin_system,
 703                                ((surf_action_network_CM02_t)
 704                                 action)->variable,
 705                                ((surf_action_network_CM02_t)
 706                                 action)->weight);
 707     ((surf_action_network_CM02_t) action)->suspended = 0;
 708   }
 709 }
 710
 711 static int net_action_is_suspended(surf_action_t action)
 712 {
 713   return ((surf_action_network_CM02_t) action)->suspended;
 714 }
 715
 716 void net_action_set_max_duration(surf_action_t action, double duration)
 717 {
 718   action->max_duration = duration;
 719 }
 720
 721 static void net_finalize(void)
 722 {
 723   surf_model_exit(surf_network_model);
 724   surf_network_model = NULL;
 725
 726   global_routing->finalize();
 727
 728   lmm_system_free(network_maxmin_system);
 729   network_maxmin_system = NULL;
 730 }
 731
 732 static void surf_network_model_init_internal(void)
 733 {
 734   surf_network_model = surf_model_init();
 735
 736   surf_network_model->name = "network";
 737   surf_network_model->action_unref = net_action_unref;
 738   surf_network_model->action_cancel = net_action_cancel;
 739   surf_network_model->action_recycle = net_action_recycle;
 740   surf_network_model->get_remains = net_action_get_remains;
 741 #ifdef HAVE_LATENCY_BOUND_TRACKING
 742   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 743 #endif
 744
 745   surf_network_model->model_private->resource_used = net_resource_used;
 746   surf_network_model->model_private->share_resources = net_share_resources;
 747   surf_network_model->model_private->update_actions_state =
 748       net_update_actions_state;
 749   surf_network_model->model_private->update_resource_state =
 750       net_update_resource_state;
 751   surf_network_model->model_private->finalize = net_finalize;
 752
 753   surf_network_model->suspend = net_action_suspend;
 754   surf_network_model->resume = net_action_resume;
 755   surf_network_model->is_suspended = net_action_is_suspended;
 756   surf_cpu_model->set_max_duration = net_action_set_max_duration;
 757
 758   surf_network_model->extension.network.communicate = net_communicate;
 759   surf_network_model->extension.network.get_route = net_get_route;
 760   surf_network_model->extension.network.get_link_bandwidth =
 761       net_get_link_bandwidth;
 762   surf_network_model->extension.network.get_link_latency =
 763       net_get_link_latency;
 764   surf_network_model->extension.network.link_shared = net_link_shared;
 765   surf_network_model->extension.network.add_traces = net_add_traces;
 766   surf_network_model->extension.network.create_resource =
 767       net_create_resource;
 768
 769   if (!network_maxmin_system)
 770     network_maxmin_system = lmm_system_new();
 771
 772   routing_model_create(sizeof(link_CM02_t),
 773                        net_link_new(xbt_strdup("__loopback__"),
 774                                     498000000, NULL, 0.000015, NULL,
 775                                     SURF_RESOURCE_ON, NULL,
 776                                     SURF_LINK_FATPIPE, NULL));
 777 }
 778
 779
 780
 781 /************************************************************************/
 782 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 783 /************************************************************************/
 784 void surf_network_model_init_SMPI(const char *filename)
 785 {
 786
 787   if (surf_network_model)
 788     return;
 789   surf_network_model_init_internal();
 790   latency_factor_callback = &smpi_latency_factor;
 791   bandwidth_factor_callback = &smpi_bandwidth_factor;
 792   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 793   net_define_callbacks(filename);
 794   xbt_dynar_push(model_list, &surf_network_model);
 795   network_solve = lmm_solve;
 796
 797   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 798
 799   update_model_description(surf_network_model_description,
 800                            "SMPI", surf_network_model);
 801 }
 802
 803 /************************************************************************/
 804 /* New model based on optimizations discussed during this thesis        */
 805 /************************************************************************/
 806 void surf_network_model_init_LegrandVelho(const char *filename)
 807 {
 808
 809   if (surf_network_model)
 810     return;
 811   surf_network_model_init_internal();
 812   net_define_callbacks(filename);
 813   xbt_dynar_push(model_list, &surf_network_model);
 814   network_solve = lmm_solve;
 815
 816   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 817   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 818                             0.92);
 819   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 820
 821   update_model_description(surf_network_model_description,
 822                            "LV08", surf_network_model);
 823 }
 824
 825 /***************************************************************************/
 826 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 827 /***************************************************************************/
 828 /* @TechReport{      rr-lip2002-40, */
 829 /*   author        = {Henri Casanova and Loris Marchal}, */
 830 /*   institution   = {LIP}, */
 831 /*   title         = {A Network Model for Simulation of Grid Application}, */
 832 /*   number        = {2002-40}, */
 833 /*   month         = {oct}, */
 834 /*   year          = {2002} */
 835 /* } */
 836 void surf_network_model_init_CM02(const char *filename)
 837 {
 838
 839   if (surf_network_model)
 840     return;
 841   surf_network_model_init_internal();
 842   net_define_callbacks(filename);
 843   xbt_dynar_push(model_list, &surf_network_model);
 844   network_solve = lmm_solve;
 845
 846   update_model_description(surf_network_model_description,
 847                            "CM02", surf_network_model);
 848 }
 849
 850 void surf_network_model_init_Reno(const char *filename)
 851 {
 852   if (surf_network_model)
 853     return;
 854   surf_network_model_init_internal();
 855   net_define_callbacks(filename);
 856
 857   xbt_dynar_push(model_list, &surf_network_model);
 858   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 859                                     func_reno_fpi);
 860   network_solve = lagrange_solve;
 861
 862   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 863   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 864                             0.92);
 865   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 866
 867   update_model_description(surf_network_model_description,
 868                            "Reno", surf_network_model);
 869 }
 870
 871
 872 void surf_network_model_init_Reno2(const char *filename)
 873 {
 874   if (surf_network_model)
 875     return;
 876   surf_network_model_init_internal();
 877   net_define_callbacks(filename);
 878
 879   xbt_dynar_push(model_list, &surf_network_model);
 880   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 881                                     func_reno2_fpi);
 882   network_solve = lagrange_solve;
 883
 884   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 885   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 886                             0.92);
 887   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
 888                             8775);
 889
 890   update_model_description(surf_network_model_description,
 891                            "Reno2", surf_network_model);
 892 }
 893
 894 void surf_network_model_init_Vegas(const char *filename)
 895 {
 896   if (surf_network_model)
 897     return;
 898   surf_network_model_init_internal();
 899   net_define_callbacks(filename);
 900
 901   xbt_dynar_push(model_list, &surf_network_model);
 902   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 903                                     func_vegas_fpi);
 904   network_solve = lagrange_solve;
 905
 906   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 907   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 908                             0.92);
 909   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 910
 911   update_model_description(surf_network_model_description,
 912                            "Vegas", surf_network_model);
 913 }