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_sender_gap = 0.0;
  19 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  20 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  21 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  22
  23 double sg_tcp_gamma = 0.0;
  24 int sg_network_fullduplex = 0;
  25
  26 xbt_dict_t gap_lookup = NULL;
  27
  28 static double net_get_link_bandwidth(const void *link);
  29
  30 static void gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
  31    const char* src = link->lmm_resource.generic_resource.name;
  32    xbt_fifo_t fifo;
  33    surf_action_network_CM02_t last_action;
  34    double bw;
  35
  36    if(sg_sender_gap > 0.0) {
  37       if(!gap_lookup) {
  38          gap_lookup = xbt_dict_new();
  39       }
  40       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
  41       action->sender.gap = 0.0;
  42       if(fifo && xbt_fifo_size(fifo) > 0) {
  43          /* Compute gap from last send */
  44          last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
  45          bw = net_get_link_bandwidth(link);
  46          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
  47          action->latency += action->sender.gap;
  48       }
  49       /* Append action as last send */
  50       action->sender.link_name = link->lmm_resource.generic_resource.name;
  51       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
  52       if(!fifo) {
  53          fifo = xbt_fifo_new();
  54          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
  55       }
  56       action->sender.fifo_item = xbt_fifo_push(fifo, action);
  57       action->sender.size = size;
  58    }
  59 }
  60
  61 static void gap_unknown(surf_action_network_CM02_t action) {
  62    action->sender.gap = 0.0;
  63    action->sender.link_name = NULL;
  64    action->sender.fifo_item = NULL;
  65    action->sender.size = 0.0;
  66 }
  67
  68 static void gap_remove(surf_action_network_CM02_t action) {
  69    xbt_fifo_t fifo;
  70    size_t size;
  71
  72    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
  73       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
  74       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
  75       size = xbt_fifo_size(fifo);
  76       if(size == 0) {
  77          xbt_fifo_free(fifo);
  78          xbt_dict_remove(gap_lookup, action->sender.link_name);
  79          size = xbt_dict_size(gap_lookup);
  80          if(size == 0) {
  81             xbt_dict_free(&gap_lookup);
  82          }
  83       }
  84    }
  85 }
  86
  87 /******************************************************************************/
  88 /*                           Factors callbacks                                */
  89 /******************************************************************************/
  90 static double constant_latency_factor(double size)
  91 {
  92   return sg_latency_factor;
  93 }
  94
  95 static double constant_bandwidth_factor(double size)
  96 {
  97   return sg_bandwidth_factor;
  98 }
  99
 100 static double constant_bandwidth_constraint(double rate, double bound,
 101                                             double size)
 102 {
 103   return rate;
 104 }
 105
 106 /**********************/
 107 /*   SMPI callbacks   */
 108 /**********************/
 109 static double smpi_latency_factor(double size)
 110 {
 111   /* 1 B <= size <= 1 KiB */
 112   if (size <= 1024.0) {
 113     return 1.0056;
 114   }
 115
 116   /* 2 KiB <= size <= 32 KiB */
 117   if (size <= 32768.0) {
 118     return 1.8805;
 119   }
 120
 121   /* 64 KiB <= size <= 4 MiB */
 122   return 22.7111;
 123 }
 124
 125 static double smpi_bandwidth_factor(double size)
 126 {
 127   /* 1 B <= size <= 1 KiB */
 128   if (size <= 1024.0) {
 129     return 0.2758;
 130   }
 131
 132   /* 2 KiB <= size <= 32 KiB */
 133   if (size <= 32768.0) {
 134     return 0.5477;
 135   }
 136
 137   /* 64 KiB <= size <= 4 MiB */
 138   return 0.9359;
 139 }
 140
 141 static double smpi_bandwidth_constraint(double rate, double bound,
 142                                         double size)
 143 {
 144   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 145 }
 146
 147
 148 static double (*latency_factor_callback) (double) =
 149     &constant_latency_factor;
 150 static double (*bandwidth_factor_callback) (double) =
 151     &constant_bandwidth_factor;
 152 static double (*bandwidth_constraint_callback) (double, double, double) =
 153     &constant_bandwidth_constraint;
 154
 155
 156 static link_CM02_t net_link_new(char *name,
 157                                 double bw_initial,
 158                                 tmgr_trace_t bw_trace,
 159                                 double lat_initial,
 160                                 tmgr_trace_t lat_trace,
 161                                 e_surf_resource_state_t
 162                                 state_initial,
 163                                 tmgr_trace_t state_trace,
 164                                 e_surf_link_sharing_policy_t
 165                                 policy, xbt_dict_t properties)
 166 {
 167   link_CM02_t nw_link = (link_CM02_t)
 168       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 169                             surf_network_model, name, properties,
 170                             network_maxmin_system,
 171                             sg_bandwidth_factor * bw_initial,
 172                             history,
 173                             state_initial, state_trace,
 174                             bw_initial, bw_trace);
 175
 176   xbt_assert1(!xbt_dict_get_or_null
 177               (surf_network_model->resource_set, name),
 178               "Link '%s' declared several times in the platform file.",
 179               name);
 180
 181   nw_link->lat_current = lat_initial;
 182   if (lat_trace)
 183     nw_link->lat_event =
 184         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 185
 186   if (policy == SURF_LINK_FATPIPE)
 187     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 188
 189   xbt_dict_set(surf_network_model->resource_set, name, nw_link,
 190                surf_resource_free);
 191 #ifdef HAVE_TRACING
 192   TRACE_surf_link_declaration(nw_link, name, bw_initial, lat_initial);
 193 #endif
 194
 195   return nw_link;
 196 }
 197
 198 static void net_parse_link_init(void)
 199 {
 200   char *name_link;
 201   double bw_initial;
 202   tmgr_trace_t bw_trace;
 203   double lat_initial;
 204   tmgr_trace_t lat_trace;
 205   e_surf_resource_state_t state_initial_link = SURF_RESOURCE_ON;
 206   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 207   tmgr_trace_t state_trace;
 208   DEBUG0("link_CM02");
 209   name_link = xbt_strdup(A_surfxml_link_id);
 210   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 211   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
 212   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 213   lat_trace = tmgr_trace_new(A_surfxml_link_latency_file);
 214
 215   xbt_assert0((A_surfxml_link_state == A_surfxml_link_state_ON)
 216               || (A_surfxml_link_state ==
 217                   A_surfxml_link_state_OFF), "Invalid state");
 218   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 219     state_initial_link = SURF_RESOURCE_ON;
 220   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
 221     state_initial_link = SURF_RESOURCE_OFF;
 222
 223   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
 224     policy_initial_link = SURF_LINK_SHARED;
 225   else
 226           {
 227           if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FATPIPE)
 228                   policy_initial_link = SURF_LINK_FATPIPE;
 229           else if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FULLDUPLEX)
 230                   policy_initial_link = SURF_LINK_FULLDUPLEX;
 231           }
 232
 233   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 234
 235   if(policy_initial_link == SURF_LINK_FULLDUPLEX)
 236   {
 237           net_link_new(bprintf("%s_UP",name_link), bw_initial, bw_trace,
 238                        lat_initial, lat_trace, state_initial_link, state_trace,
 239                        policy_initial_link, xbt_dict_new());
 240           net_link_new(bprintf("%s_DOWN",name_link), bw_initial, bw_trace,
 241                        lat_initial, lat_trace, state_initial_link, state_trace,
 242                        policy_initial_link, xbt_dict_new());
 243   }
 244   else
 245   {
 246           net_link_new(name_link, bw_initial, bw_trace,
 247                        lat_initial, lat_trace, state_initial_link, state_trace,
 248                        policy_initial_link, xbt_dict_new());
 249   }
 250
 251 }
 252
 253 static void net_create_resource(char *name,
 254                                 double bw_initial,
 255                                 tmgr_trace_t bw_trace,
 256                                 double lat_initial,
 257                                 tmgr_trace_t lat_trace,
 258                                 e_surf_resource_state_t
 259                                 state_initial,
 260                                 tmgr_trace_t state_trace,
 261                                 e_surf_link_sharing_policy_t policy,
 262                                 xbt_dict_t properties)
 263 {
 264   net_link_new(name, bw_initial, bw_trace,
 265                lat_initial, lat_trace, state_initial, state_trace,
 266                policy, xbt_dict_new());
 267 }
 268
 269 static void net_add_traces(void)
 270 {
 271   xbt_dict_cursor_t cursor = NULL;
 272   char *trace_name, *elm;
 273
 274   static int called = 0;
 275   if (called)
 276     return;
 277   called = 1;
 278
 279   /* connect all traces relative to network */
 280   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 281     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 282     link_CM02_t link =
 283         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 284
 285     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 286                 trace_name, elm);
 287     xbt_assert2(trace,
 288                 "Cannot connect trace %s to link %s: trace undefined",
 289                 trace_name, elm);
 290
 291     link->lmm_resource.state_event =
 292         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 293   }
 294
 295   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 296     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 297     link_CM02_t link =
 298         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 299
 300     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 301                 trace_name, elm);
 302     xbt_assert2(trace,
 303                 "Cannot connect trace %s to link %s: trace undefined",
 304                 trace_name, elm);
 305
 306     link->lmm_resource.power.event =
 307         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 308   }
 309
 310   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 311     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 312     link_CM02_t link =
 313         xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 314
 315     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 316                 trace_name, elm);
 317     xbt_assert2(trace,
 318                 "Cannot connect trace %s to link %s: trace undefined",
 319                 trace_name, elm);
 320
 321     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 322   }
 323 }
 324
 325 static void net_define_callbacks(const char *file)
 326 {
 327   /* Figuring out the network links */
 328   surfxml_add_callback(STag_surfxml_link_cb_list, &net_parse_link_init);
 329   surfxml_add_callback(ETag_surfxml_platform_cb_list, &net_add_traces);
 330 }
 331
 332 static int net_resource_used(void *resource_id)
 333 {
 334   return lmm_constraint_used(network_maxmin_system,
 335                              ((surf_resource_lmm_t)
 336                               resource_id)->constraint);
 337 }
 338
 339 static int net_action_unref(surf_action_t action)
 340 {
 341   action->refcount--;
 342   if (!action->refcount) {
 343     xbt_swag_remove(action, action->state_set);
 344     if (((surf_action_network_CM02_t) action)->variable)
 345       lmm_variable_free(network_maxmin_system,
 346                         ((surf_action_network_CM02_t) action)->variable);
 347 #ifdef HAVE_TRACING
 348     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 349     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 350     if (action->category)
 351       xbt_free(action->category);
 352 #endif
 353     free(action);
 354     return 1;
 355   }
 356   return 0;
 357 }
 358
 359 static void net_action_cancel(surf_action_t action)
 360 {
 361   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 362 }
 363
 364 void net_action_recycle(surf_action_t action)
 365 {
 366   return;
 367 }
 368
 369 #ifdef HAVE_LATENCY_BOUND_TRACKING
 370 int net_get_link_latency_limited(surf_action_t action)
 371 {
 372   return action->latency_limited;
 373 }
 374 #endif
 375
 376 double net_action_get_remains(surf_action_t action)
 377 {
 378   return action->remains;
 379 }
 380
 381 static double net_share_resources(double now)
 382 {
 383   s_surf_action_network_CM02_t s_action;
 384   surf_action_network_CM02_t action = NULL;
 385   xbt_swag_t running_actions =
 386       surf_network_model->states.running_action_set;
 387   double min;
 388
 389   min = generic_maxmin_share_resources(running_actions,
 390                                        xbt_swag_offset(s_action,
 391                                                        variable),
 392                                        network_maxmin_system,
 393                                        network_solve);
 394
 395 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 396
 397   xbt_swag_foreach(action, running_actions) {
 398 #ifdef HAVE_LATENCY_BOUND_TRACKING
 399     if (lmm_is_variable_limited_by_latency(action->variable)) {
 400       (action->generic_action).latency_limited = 1;
 401     } else {
 402       (action->generic_action).latency_limited = 0;
 403     }
 404 #endif
 405     if (action->latency > 0) {
 406       if (min < 0)
 407         min = action->latency;
 408       else if (action->latency < min)
 409         min = action->latency;
 410     }
 411   }
 412
 413   return min;
 414 }
 415
 416 static void net_update_actions_state(double now, double delta)
 417 {
 418   double deltap = 0.0;
 419   surf_action_network_CM02_t action = NULL;
 420   surf_action_network_CM02_t next_action = NULL;
 421   xbt_swag_t running_actions =
 422       surf_network_model->states.running_action_set;
 423   /*
 424      xbt_swag_t failed_actions =
 425      surf_network_model->states.failed_action_set;
 426    */
 427
 428   xbt_swag_foreach_safe(action, next_action, running_actions) {
 429     deltap = delta;
 430     if (action->latency > 0) {
 431       if (action->latency > deltap) {
 432         double_update(&(action->latency), deltap);
 433         deltap = 0.0;
 434       } else {
 435         double_update(&(deltap), action->latency);
 436         action->latency = 0.0;
 437       }
 438       if ((action->latency == 0.0) && !(action->suspended))
 439         lmm_update_variable_weight(network_maxmin_system, action->variable,
 440                                    action->weight);
 441     }
 442 #ifdef HAVE_TRACING
 443     xbt_dynar_t route =
 444         global_routing->get_route(action->src_name, action->dst_name);
 445     link_CM02_t link;
 446     unsigned int i;
 447     xbt_dynar_foreach(route, i, link) {
 448       TRACE_surf_link_set_utilization(link,
 449                                       action->generic_action.data,
 450                                       (surf_action_t) action,
 451                                       lmm_variable_getvalue
 452                                       (action->variable), now - delta,
 453                                       delta);
 454     }
 455 #endif
 456     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 457                                 /* There is actually no link used, hence an infinite bandwidth.
 458                                  * This happens often when using models like vivaldi.
 459                                  * In such case, just make sure that the action completes immediately.
 460                                  */
 461         double_update(&(action->generic_action.remains),
 462                         action->generic_action.remains);
 463     }
 464     double_update(&(action->generic_action.remains),
 465                   lmm_variable_getvalue(action->variable) * deltap);
 466     if (action->generic_action.max_duration != NO_MAX_DURATION)
 467       double_update(&(action->generic_action.max_duration), delta);
 468
 469     if ((action->generic_action.remains <= 0) &&
 470         (lmm_get_variable_weight(action->variable) > 0)) {
 471       action->generic_action.finish = surf_get_clock();
 472       surf_network_model->action_state_set((surf_action_t) action,
 473                                            SURF_ACTION_DONE);
 474       gap_remove(action);
 475     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 476                && (action->generic_action.max_duration <= 0)) {
 477       action->generic_action.finish = surf_get_clock();
 478       surf_network_model->action_state_set((surf_action_t) action,
 479                                            SURF_ACTION_DONE);
 480       gap_remove(action);
 481     }
 482   }
 483
 484   return;
 485 }
 486
 487 static void net_update_resource_state(void *id,
 488                                       tmgr_trace_event_t event_type,
 489                                       double value, double date)
 490 {
 491   link_CM02_t nw_link = id;
 492   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 493   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 494   /*     value, event_type); */
 495
 496   if (event_type == nw_link->lmm_resource.power.event) {
 497     double delta =
 498         sg_weight_S_parameter / value - sg_weight_S_parameter /
 499         (nw_link->lmm_resource.power.peak *
 500          nw_link->lmm_resource.power.scale);
 501     lmm_variable_t var = NULL;
 502     lmm_element_t elem = NULL;
 503     surf_action_network_CM02_t action = NULL;
 504
 505     nw_link->lmm_resource.power.peak = value;
 506     lmm_update_constraint_bound(network_maxmin_system,
 507                                 nw_link->lmm_resource.constraint,
 508                                 sg_bandwidth_factor *
 509                                 (nw_link->lmm_resource.power.peak *
 510                                  nw_link->lmm_resource.power.scale));
 511 #ifdef HAVE_TRACING
 512     TRACE_surf_link_set_bandwidth(date, nw_link,
 513                                   sg_bandwidth_factor *
 514                                   (nw_link->lmm_resource.power.peak *
 515                                    nw_link->lmm_resource.power.scale));
 516 #endif
 517     if (sg_weight_S_parameter > 0) {
 518       while ((var = lmm_get_var_from_cnst
 519               (network_maxmin_system, nw_link->lmm_resource.constraint,
 520                &elem))) {
 521         action = lmm_variable_id(var);
 522         action->weight += delta;
 523         if (!(action->suspended))
 524           lmm_update_variable_weight(network_maxmin_system,
 525                                      action->variable, action->weight);
 526       }
 527     }
 528     if (tmgr_trace_event_free(event_type))
 529       nw_link->lmm_resource.power.event = NULL;
 530   } else if (event_type == nw_link->lat_event) {
 531     double delta = value - nw_link->lat_current;
 532     lmm_variable_t var = NULL;
 533     lmm_element_t elem = NULL;
 534     surf_action_network_CM02_t action = NULL;
 535
 536     nw_link->lat_current = value;
 537     while ((var = lmm_get_var_from_cnst
 538             (network_maxmin_system, nw_link->lmm_resource.constraint,
 539              &elem))) {
 540       action = lmm_variable_id(var);
 541       action->lat_current += delta;
 542       action->weight += delta;
 543       if (action->rate < 0)
 544         lmm_update_variable_bound(network_maxmin_system, action->variable,
 545                                   sg_tcp_gamma / (2.0 *
 546                                                   action->lat_current));
 547       else {
 548         lmm_update_variable_bound(network_maxmin_system, action->variable,
 549                                   min(action->rate,
 550                                       sg_tcp_gamma / (2.0 *
 551                                                       action->lat_current)));
 552
 553         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 554           INFO0("Flow is limited BYBANDWIDTH");
 555         } else {
 556           INFO1("Flow is limited BYLATENCY, latency of flow is %f",
 557                 action->lat_current);
 558         }
 559       }
 560       if (!(action->suspended))
 561         lmm_update_variable_weight(network_maxmin_system, action->variable,
 562                                    action->weight);
 563
 564     }
 565     if (tmgr_trace_event_free(event_type))
 566       nw_link->lat_event = NULL;
 567   } else if (event_type == nw_link->lmm_resource.state_event) {
 568     if (value > 0)
 569       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 570     else {
 571       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 572       lmm_variable_t var = NULL;
 573       lmm_element_t elem = NULL;
 574
 575       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 576       while ((var = lmm_get_var_from_cnst
 577               (network_maxmin_system, cnst, &elem))) {
 578         surf_action_t action = lmm_variable_id(var);
 579
 580         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 581             surf_action_state_get(action) == SURF_ACTION_READY) {
 582           action->finish = date;
 583           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 584         }
 585       }
 586     }
 587     if (tmgr_trace_event_free(event_type))
 588       nw_link->lmm_resource.state_event = NULL;
 589   } else {
 590     CRITICAL0("Unknown event ! \n");
 591     xbt_abort();
 592   }
 593
 594   return;
 595 }
 596
 597
 598 static surf_action_t net_communicate(const char *src_name,
 599                                      const char *dst_name, double size,
 600                                      double rate)
 601 {
 602   unsigned int i;
 603   link_CM02_t link;
 604   int failed = 0;
 605   surf_action_network_CM02_t action = NULL;
 606   double bandwidth_bound;
 607   double latency=0.0;
 608   /* LARGE PLATFORMS HACK:
 609      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 610      Use the cluster_id for ->id */
 611
 612   xbt_dynar_t back_route = NULL;
 613   int constraints_per_variable = 0;
 614   // I will need this route for some time so let's call get_route_no_cleanup
 615   xbt_dynar_t route = global_routing->get_route_no_cleanup(src_name, dst_name);
 616
 617
 618   if (sg_network_fullduplex == 1) {
 619     back_route = global_routing->get_route(dst_name, src_name);
 620   }
 621
 622   /* LARGE PLATFORMS HACK:
 623      total_route_size = route_size + src->link_nb + dst->nb */
 624
 625   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 626   /* LARGE PLATFORMS HACK:
 627      assert on total_route_size */
 628   latency = global_routing->get_latency(src_name,dst_name);
 629   xbt_assert2(xbt_dynar_length(route) || latency,
 630               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 631               src_name, dst_name);
 632
 633   xbt_dynar_foreach(route, i, link) {
 634     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 635       failed = 1;
 636       break;
 637     }
 638   }
 639   action =
 640       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 641                       surf_network_model, failed);
 642 #ifdef HAVE_LATENCY_BOUND_TRACKING
 643   (action->generic_action).latency_limited = 0;
 644 #endif
 645   action->weight = action->latency = latency;
 646
 647   xbt_swag_insert(action, action->generic_action.state_set);
 648   action->rate = rate;
 649
 650   bandwidth_bound = -1.0;
 651
 652   xbt_dynar_foreach(route, i, link) {
 653     action->weight +=
 654         sg_weight_S_parameter /
 655         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 656     if (bandwidth_bound < 0.0)
 657       bandwidth_bound =
 658           (*bandwidth_factor_callback) (size) *
 659           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 660     else
 661       bandwidth_bound =
 662           min(bandwidth_bound,
 663               (*bandwidth_factor_callback) (size) *
 664               (link->lmm_resource.power.peak *
 665                link->lmm_resource.power.scale));
 666   }
 667   /* LARGE PLATFORMS HACK:
 668      Add src->link and dst->link latencies */
 669   action->lat_current = action->latency;
 670   action->latency *= (*latency_factor_callback) (size);
 671   action->rate =
 672       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 673                                         size);
 674
 675   if(xbt_dynar_length(route) > 0) {
 676     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 677     gap_append(size, link, action);
 678     DEBUG5("Comm %p: %s -> %s gap=%f (lat=%f)",
 679            action, src_name, dst_name, action->sender.gap, action->latency);
 680   } else {
 681     gap_unknown(action);
 682   }
 683
 684
 685   /* LARGE PLATFORMS HACK:
 686      lmm_variable_new(..., total_route_size) */
 687   if (back_route != NULL) {
 688     constraints_per_variable =
 689         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 690   } else {
 691     constraints_per_variable = xbt_dynar_length(route);
 692   }
 693
 694   if (action->latency > 0)
 695     action->variable =
 696         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 697                          constraints_per_variable);
 698   else
 699     action->variable =
 700         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 701                          constraints_per_variable);
 702
 703   if (action->rate < 0) {
 704     if (action->lat_current > 0)
 705       lmm_update_variable_bound(network_maxmin_system, action->variable,
 706                                 sg_tcp_gamma / (2.0 *
 707                                                 action->lat_current));
 708     else
 709       lmm_update_variable_bound(network_maxmin_system, action->variable,
 710                                 -1.0);
 711   } else {
 712     if (action->lat_current > 0)
 713       lmm_update_variable_bound(network_maxmin_system, action->variable,
 714                                 min(action->rate,
 715                                     sg_tcp_gamma / (2.0 *
 716                                                     action->lat_current)));
 717     else
 718       lmm_update_variable_bound(network_maxmin_system, action->variable,
 719                                 action->rate);
 720   }
 721
 722   xbt_dynar_foreach(route, i, link) {
 723     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 724                action->variable, 1.0);
 725   }
 726
 727   if (sg_network_fullduplex == 1) {
 728     DEBUG1("Fullduplex active adding backward flow using 5%c", '%');
 729     xbt_dynar_foreach(back_route, i, link) {
 730       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 731                  action->variable, .05);
 732     }
 733   }
 734   /* LARGE PLATFORMS HACK:
 735      expand also with src->link and dst->link */
 736 #ifdef HAVE_TRACING
 737   action->src_name = xbt_new(char, strlen(src_name) + 1);
 738   strncpy(action->src_name, src_name, strlen(src_name) + 1);
 739
 740   action->dst_name = xbt_new(char, strlen(dst_name) + 1);
 741   strncpy(action->dst_name, dst_name, strlen(dst_name) + 1);
 742 #endif
 743
 744   xbt_dynar_free(&route);
 745   XBT_OUT;
 746
 747   return (surf_action_t) action;
 748 }
 749
 750 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 751 {
 752   return global_routing->get_route(src, dst);
 753 }
 754
 755 static double net_get_link_bandwidth(const void *link)
 756 {
 757   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 758   return lmm->power.peak * lmm->power.scale;
 759 }
 760
 761 static double net_get_link_latency(const void *link)
 762 {
 763   return ((link_CM02_t) link)->lat_current;
 764 }
 765
 766 static int net_link_shared(const void *link)
 767 {
 768   return
 769       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 770 }
 771
 772 static void net_action_suspend(surf_action_t action)
 773 {
 774   ((surf_action_network_CM02_t) action)->suspended = 1;
 775   lmm_update_variable_weight(network_maxmin_system,
 776                              ((surf_action_network_CM02_t)
 777                               action)->variable, 0.0);
 778 }
 779
 780 static void net_action_resume(surf_action_t action)
 781 {
 782   if (((surf_action_network_CM02_t) action)->suspended) {
 783     lmm_update_variable_weight(network_maxmin_system,
 784                                ((surf_action_network_CM02_t)
 785                                 action)->variable,
 786                                ((surf_action_network_CM02_t)
 787                                 action)->weight);
 788     ((surf_action_network_CM02_t) action)->suspended = 0;
 789   }
 790 }
 791
 792 static int net_action_is_suspended(surf_action_t action)
 793 {
 794   return ((surf_action_network_CM02_t) action)->suspended;
 795 }
 796
 797 void net_action_set_max_duration(surf_action_t action, double duration)
 798 {
 799   action->max_duration = duration;
 800 }
 801
 802 #ifdef HAVE_TRACING
 803 static void net_action_set_category(surf_action_t action, const char *category)
 804 {
 805   action->category = xbt_strdup (category);
 806 }
 807 #endif
 808
 809 static void net_finalize(void)
 810 {
 811   surf_model_exit(surf_network_model);
 812   surf_network_model = NULL;
 813
 814   global_routing->finalize();
 815
 816   lmm_system_free(network_maxmin_system);
 817   network_maxmin_system = NULL;
 818 }
 819
 820 static void surf_network_model_init_internal(void)
 821 {
 822   surf_network_model = surf_model_init();
 823
 824   surf_network_model->name = "network";
 825   surf_network_model->action_unref = net_action_unref;
 826   surf_network_model->action_cancel = net_action_cancel;
 827   surf_network_model->action_recycle = net_action_recycle;
 828   surf_network_model->get_remains = net_action_get_remains;
 829 #ifdef HAVE_LATENCY_BOUND_TRACKING
 830   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 831 #endif
 832
 833   surf_network_model->model_private->resource_used = net_resource_used;
 834   surf_network_model->model_private->share_resources = net_share_resources;
 835   surf_network_model->model_private->update_actions_state =
 836       net_update_actions_state;
 837   surf_network_model->model_private->update_resource_state =
 838       net_update_resource_state;
 839   surf_network_model->model_private->finalize = net_finalize;
 840
 841   surf_network_model->suspend = net_action_suspend;
 842   surf_network_model->resume = net_action_resume;
 843   surf_network_model->is_suspended = net_action_is_suspended;
 844   surf_network_model->set_max_duration = net_action_set_max_duration;
 845 #ifdef HAVE_TRACING
 846   surf_network_model->set_category = net_action_set_category;
 847 #endif
 848
 849   surf_network_model->extension.network.communicate = net_communicate;
 850   surf_network_model->extension.network.get_route = net_get_route;
 851   surf_network_model->extension.network.get_link_bandwidth =
 852       net_get_link_bandwidth;
 853   surf_network_model->extension.network.get_link_latency =
 854       net_get_link_latency;
 855   surf_network_model->extension.network.link_shared = net_link_shared;
 856   surf_network_model->extension.network.add_traces = net_add_traces;
 857   surf_network_model->extension.network.create_resource =
 858       net_create_resource;
 859
 860   if (!network_maxmin_system)
 861     network_maxmin_system = lmm_system_new();
 862
 863   routing_model_create(sizeof(link_CM02_t),
 864                        net_link_new(xbt_strdup("__loopback__"),
 865                                     498000000, NULL, 0.000015, NULL,
 866                                     SURF_RESOURCE_ON, NULL,
 867                                     SURF_LINK_FATPIPE, NULL),
 868                        net_get_link_latency);
 869 }
 870
 871
 872
 873 /************************************************************************/
 874 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 875 /************************************************************************/
 876 void surf_network_model_init_SMPI(const char *filename)
 877 {
 878
 879   if (surf_network_model)
 880     return;
 881   surf_network_model_init_internal();
 882   latency_factor_callback = &smpi_latency_factor;
 883   bandwidth_factor_callback = &smpi_bandwidth_factor;
 884   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 885   net_define_callbacks(filename);
 886   xbt_dynar_push(model_list, &surf_network_model);
 887   network_solve = lmm_solve;
 888
 889   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
 890   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 891
 892   update_model_description(surf_network_model_description,
 893                            "SMPI", surf_network_model);
 894 }
 895
 896 /************************************************************************/
 897 /* New model based on optimizations discussed during this thesis        */
 898 /************************************************************************/
 899 void surf_network_model_init_LegrandVelho(const char *filename)
 900 {
 901
 902   if (surf_network_model)
 903     return;
 904   surf_network_model_init_internal();
 905   net_define_callbacks(filename);
 906   xbt_dynar_push(model_list, &surf_network_model);
 907   network_solve = lmm_solve;
 908
 909   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 910   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 911                             0.92);
 912   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 913
 914   update_model_description(surf_network_model_description,
 915                            "LV08", surf_network_model);
 916 }
 917
 918 /***************************************************************************/
 919 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 920 /***************************************************************************/
 921 /* @TechReport{      rr-lip2002-40, */
 922 /*   author        = {Henri Casanova and Loris Marchal}, */
 923 /*   institution   = {LIP}, */
 924 /*   title         = {A Network Model for Simulation of Grid Application}, */
 925 /*   number        = {2002-40}, */
 926 /*   month         = {oct}, */
 927 /*   year          = {2002} */
 928 /* } */
 929 void surf_network_model_init_CM02(const char *filename)
 930 {
 931
 932   if (surf_network_model)
 933     return;
 934   surf_network_model_init_internal();
 935   net_define_callbacks(filename);
 936   xbt_dynar_push(model_list, &surf_network_model);
 937   network_solve = lmm_solve;
 938
 939   update_model_description(surf_network_model_description,
 940                            "CM02", surf_network_model);
 941 }
 942
 943 void surf_network_model_init_Reno(const char *filename)
 944 {
 945   if (surf_network_model)
 946     return;
 947   surf_network_model_init_internal();
 948   net_define_callbacks(filename);
 949
 950   xbt_dynar_push(model_list, &surf_network_model);
 951   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 952                                     func_reno_fpi);
 953   network_solve = lagrange_solve;
 954
 955   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 956   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 957                             0.92);
 958   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 959
 960   update_model_description(surf_network_model_description,
 961                            "Reno", surf_network_model);
 962 }
 963
 964
 965 void surf_network_model_init_Reno2(const char *filename)
 966 {
 967   if (surf_network_model)
 968     return;
 969   surf_network_model_init_internal();
 970   net_define_callbacks(filename);
 971
 972   xbt_dynar_push(model_list, &surf_network_model);
 973   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 974                                     func_reno2_fpi);
 975   network_solve = lagrange_solve;
 976
 977   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 978   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 979                             0.92);
 980   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
 981                             8775);
 982
 983   update_model_description(surf_network_model_description,
 984                            "Reno2", surf_network_model);
 985 }
 986
 987 void surf_network_model_init_Vegas(const char *filename)
 988 {
 989   if (surf_network_model)
 990     return;
 991   surf_network_model_init_internal();
 992   net_define_callbacks(filename);
 993
 994   xbt_dynar_push(model_list, &surf_network_model);
 995   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 996                                     func_vegas_fpi);
 997   network_solve = lagrange_solve;
 998
 999   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1000   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1001                             0.92);
1002   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1003
1004   update_model_description(surf_network_model_description,
1005                            "Vegas", surf_network_model);
1006 }