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  *------------------ <copy/paste C code snippet in surf/network.c> ----------------------
 108  *
 109  * produced by: ./calibrate_piecewise.py griffon_skampi_pt2pt.ski.dat 2 2.4e-5 1.25e8 1024 65536
 110  *
 111  *---------------------------------------------------------------------------------------
 112  **/
 113 static double smpi_bandwidth_factor(double size)
 114 {
 115           /* case 1 Bytes <= size <=1024 Bytes */
 116           if (1 <= size && size <=  1024) {
 117                     return(0.188567);
 118           }
 119           /* case 1536 Bytes <= size <=65536 Bytes */
 120           if (1536 <= size && size <=  65536) {
 121                     return(0.58527);
 122           }
 123           /* case 66560 Bytes <= size */
 124           if (66560 <= size ) {
 125                     return(0.933246);
 126           }
 127 }
 128
 129 static double smpi_latency_factor(double size)
 130 {
 131           /* case 1 Bytes <= size <=1024 Bytes */
 132           if (1 <= size && size <=  1024) {
 133                     return(1.1484);
 134           }
 135           /* case 1536 Bytes <= size <=65536 Bytes */
 136           if (1536 <= size && size <=  65536) {
 137                     return(1.82006);
 138           }
 139           /* case 66560 Bytes <= size */
 140           if (66560 <= size) {
 141                     return(14.6187);
 142           }
 143 }
 144
 145 /**
 146  *------------------ </copy/paste C code snippet in surf/network.c> ---------------------
 147  **/
 148
 149
 150 static double smpi_bandwidth_constraint(double rate, double bound,
 151                                         double size)
 152 {
 153   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 154 }
 155
 156
 157 static double (*latency_factor_callback) (double) =
 158     &constant_latency_factor;
 159 static double (*bandwidth_factor_callback) (double) =
 160     &constant_bandwidth_factor;
 161 static double (*bandwidth_constraint_callback) (double, double, double) =
 162     &constant_bandwidth_constraint;
 163
 164
 165 static link_CM02_t net_link_new(char *name,
 166                                 double bw_initial,
 167                                 tmgr_trace_t bw_trace,
 168                                 double lat_initial,
 169                                 tmgr_trace_t lat_trace,
 170                                 e_surf_resource_state_t
 171                                 state_initial,
 172                                 tmgr_trace_t state_trace,
 173                                 e_surf_link_sharing_policy_t
 174                                 policy, xbt_dict_t properties)
 175 {
 176   link_CM02_t nw_link = (link_CM02_t)
 177       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 178                             surf_network_model, name, properties,
 179                             network_maxmin_system,
 180                             sg_bandwidth_factor * bw_initial,
 181                             history,
 182                             state_initial, state_trace,
 183                             bw_initial, bw_trace);
 184
 185   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 186               "Link '%s' declared several times in the platform file.",
 187               name);
 188
 189   nw_link->lat_current = lat_initial;
 190   if (lat_trace)
 191     nw_link->lat_event =
 192         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 193
 194   if (policy == SURF_LINK_FATPIPE)
 195     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 196
 197   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 198
 199   return nw_link;
 200 }
 201
 202 static void net_parse_link_init(void)
 203 {
 204   char *name_link;
 205   double bw_initial;
 206   tmgr_trace_t bw_trace;
 207   double lat_initial;
 208   tmgr_trace_t lat_trace;
 209   e_surf_resource_state_t state_initial_link = SURF_RESOURCE_ON;
 210   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 211   tmgr_trace_t state_trace;
 212   XBT_DEBUG("link_CM02");
 213   name_link = xbt_strdup(A_surfxml_link_id);
 214   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 215   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
 216   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 217   lat_trace = tmgr_trace_new(A_surfxml_link_latency_file);
 218
 219   xbt_assert((A_surfxml_link_state == A_surfxml_link_state_ON)
 220               || (A_surfxml_link_state ==
 221                   A_surfxml_link_state_OFF), "Invalid state");
 222   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 223     state_initial_link = SURF_RESOURCE_ON;
 224   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
 225     state_initial_link = SURF_RESOURCE_OFF;
 226
 227   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
 228     policy_initial_link = SURF_LINK_SHARED;
 229   else
 230           {
 231           if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FATPIPE)
 232                   policy_initial_link = SURF_LINK_FATPIPE;
 233           else if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FULLDUPLEX)
 234                   policy_initial_link = SURF_LINK_FULLDUPLEX;
 235           }
 236
 237   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 238
 239   if(policy_initial_link == SURF_LINK_FULLDUPLEX)
 240   {
 241           net_link_new(bprintf("%s_UP",name_link), bw_initial, bw_trace,
 242                        lat_initial, lat_trace, state_initial_link, state_trace,
 243                        policy_initial_link, xbt_dict_new());
 244           net_link_new(bprintf("%s_DOWN",name_link), bw_initial, bw_trace,
 245                        lat_initial, lat_trace, state_initial_link, state_trace,
 246                        policy_initial_link, xbt_dict_new());
 247   }
 248   else
 249   {
 250           net_link_new(name_link, bw_initial, bw_trace,
 251                        lat_initial, lat_trace, state_initial_link, state_trace,
 252                        policy_initial_link, xbt_dict_new());
 253   }
 254
 255 }
 256
 257 static void net_create_resource(char *name,
 258                                 double bw_initial,
 259                                 tmgr_trace_t bw_trace,
 260                                 double lat_initial,
 261                                 tmgr_trace_t lat_trace,
 262                                 e_surf_resource_state_t
 263                                 state_initial,
 264                                 tmgr_trace_t state_trace,
 265                                 e_surf_link_sharing_policy_t policy,
 266                                 xbt_dict_t properties)
 267 {
 268   net_link_new(name, bw_initial, bw_trace,
 269                lat_initial, lat_trace, state_initial, state_trace,
 270                policy, xbt_dict_new());
 271 }
 272
 273 static void net_add_traces(void)
 274 {
 275   xbt_dict_cursor_t cursor = NULL;
 276   char *trace_name, *elm;
 277
 278   static int called = 0;
 279   if (called)
 280     return;
 281   called = 1;
 282
 283   /* connect all traces relative to network */
 284   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 285     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 286     link_CM02_t link =
 287         xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 288
 289     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 290                 trace_name, elm);
 291     xbt_assert(trace,
 292                 "Cannot connect trace %s to link %s: trace undefined",
 293                 trace_name, elm);
 294
 295     link->lmm_resource.state_event =
 296         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 297   }
 298
 299   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 300     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 301     link_CM02_t link =
 302                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 303
 304     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 305                 trace_name, elm);
 306     xbt_assert(trace,
 307                 "Cannot connect trace %s to link %s: trace undefined",
 308                 trace_name, elm);
 309
 310     link->lmm_resource.power.event =
 311         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 312   }
 313
 314   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 315     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 316     link_CM02_t link =
 317                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 318
 319     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 320                 trace_name, elm);
 321     xbt_assert(trace,
 322                 "Cannot connect trace %s to link %s: trace undefined",
 323                 trace_name, elm);
 324
 325     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 326   }
 327 }
 328
 329 static void net_define_callbacks(const char *file)
 330 {
 331   /* Figuring out the network links */
 332   surfxml_add_callback(STag_surfxml_link_cb_list, &net_parse_link_init);
 333   surfxml_add_callback(ETag_surfxml_platform_cb_list, &net_add_traces);
 334 }
 335
 336 static int net_resource_used(void *resource_id)
 337 {
 338   return lmm_constraint_used(network_maxmin_system,
 339                              ((surf_resource_lmm_t)
 340                               resource_id)->constraint);
 341 }
 342
 343 static int net_action_unref(surf_action_t action)
 344 {
 345   action->refcount--;
 346   if (!action->refcount) {
 347     xbt_swag_remove(action, action->state_set);
 348     if (((surf_action_network_CM02_t) action)->variable)
 349       lmm_variable_free(network_maxmin_system,
 350                         ((surf_action_network_CM02_t) action)->variable);
 351 #ifdef HAVE_TRACING
 352     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 353     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 354     if (action->category)
 355       xbt_free(action->category);
 356 #endif
 357     surf_action_free(&action);
 358     return 1;
 359   }
 360   return 0;
 361 }
 362
 363 static void net_action_cancel(surf_action_t action)
 364 {
 365   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 366 }
 367
 368 void net_action_recycle(surf_action_t action)
 369 {
 370   return;
 371 }
 372
 373 #ifdef HAVE_LATENCY_BOUND_TRACKING
 374 int net_get_link_latency_limited(surf_action_t action)
 375 {
 376   return action->latency_limited;
 377 }
 378 #endif
 379
 380 double net_action_get_remains(surf_action_t action)
 381 {
 382   return action->remains;
 383 }
 384
 385 static double net_share_resources(double now)
 386 {
 387   s_surf_action_network_CM02_t s_action;
 388   surf_action_network_CM02_t action = NULL;
 389   xbt_swag_t running_actions =
 390       surf_network_model->states.running_action_set;
 391   double min;
 392
 393   min = generic_maxmin_share_resources(running_actions,
 394                                        xbt_swag_offset(s_action,
 395                                                        variable),
 396                                        network_maxmin_system,
 397                                        network_solve);
 398
 399 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 400
 401   xbt_swag_foreach(action, running_actions) {
 402 #ifdef HAVE_LATENCY_BOUND_TRACKING
 403     if (lmm_is_variable_limited_by_latency(action->variable)) {
 404       (action->generic_action).latency_limited = 1;
 405     } else {
 406       (action->generic_action).latency_limited = 0;
 407     }
 408 #endif
 409     if (action->latency > 0) {
 410       if (min < 0)
 411         min = action->latency;
 412       else if (action->latency < min)
 413         min = action->latency;
 414     }
 415   }
 416
 417   XBT_DEBUG("Min of share resources %f", min);
 418
 419   return min;
 420 }
 421
 422 static void net_update_actions_state(double now, double delta)
 423 {
 424   double deltap = 0.0;
 425   surf_action_network_CM02_t action = NULL;
 426   surf_action_network_CM02_t next_action = NULL;
 427   xbt_swag_t running_actions =
 428       surf_network_model->states.running_action_set;
 429   /*
 430      xbt_swag_t failed_actions =
 431      surf_network_model->states.failed_action_set;
 432    */
 433
 434   xbt_swag_foreach_safe(action, next_action, running_actions) {
 435     deltap = delta;
 436     if (action->latency > 0) {
 437       if (action->latency > deltap) {
 438         double_update(&(action->latency), deltap);
 439         deltap = 0.0;
 440       } else {
 441         double_update(&(deltap), action->latency);
 442         action->latency = 0.0;
 443       }
 444       if ((action->latency == 0.0) && !(action->suspended))
 445         lmm_update_variable_weight(network_maxmin_system, action->variable,
 446                                    action->weight);
 447     }
 448 #ifdef HAVE_TRACING
 449     if (TRACE_is_enabled()) {
 450       xbt_dynar_t route = global_routing->get_route(action->src_name,
 451                                                     action->dst_name);
 452       link_CM02_t link;
 453       unsigned int i;
 454       xbt_dynar_foreach(route, i, link) {
 455         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 456                                         action->generic_action.data,
 457                                         (surf_action_t) action,
 458                                         lmm_variable_getvalue
 459                                         (action->variable), now - delta,
 460                                         delta);
 461       }
 462     }
 463 #endif
 464     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 465                                 /* There is actually no link used, hence an infinite bandwidth.
 466                                  * This happens often when using models like vivaldi.
 467                                  * In such case, just make sure that the action completes immediately.
 468                                  */
 469         double_update(&(action->generic_action.remains),
 470                         action->generic_action.remains);
 471     }
 472     double_update(&(action->generic_action.remains),
 473                   lmm_variable_getvalue(action->variable) * deltap);
 474     if (action->generic_action.max_duration != NO_MAX_DURATION)
 475       double_update(&(action->generic_action.max_duration), delta);
 476
 477     if ((action->generic_action.remains <= 0) &&
 478         (lmm_get_variable_weight(action->variable) > 0)) {
 479       action->generic_action.finish = surf_get_clock();
 480       surf_network_model->action_state_set((surf_action_t) action,
 481                                            SURF_ACTION_DONE);
 482       gap_remove(action);
 483     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 484                && (action->generic_action.max_duration <= 0)) {
 485       action->generic_action.finish = surf_get_clock();
 486       surf_network_model->action_state_set((surf_action_t) action,
 487                                            SURF_ACTION_DONE);
 488       gap_remove(action);
 489     }
 490   }
 491
 492   return;
 493 }
 494
 495 static void net_update_resource_state(void *id,
 496                                       tmgr_trace_event_t event_type,
 497                                       double value, double date)
 498 {
 499   link_CM02_t nw_link = id;
 500   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 501   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 502   /*     value, event_type); */
 503
 504   if (event_type == nw_link->lmm_resource.power.event) {
 505     double delta =
 506         sg_weight_S_parameter / value - sg_weight_S_parameter /
 507         (nw_link->lmm_resource.power.peak *
 508          nw_link->lmm_resource.power.scale);
 509     lmm_variable_t var = NULL;
 510     lmm_element_t elem = NULL;
 511     surf_action_network_CM02_t action = NULL;
 512
 513     nw_link->lmm_resource.power.peak = value;
 514     lmm_update_constraint_bound(network_maxmin_system,
 515                                 nw_link->lmm_resource.constraint,
 516                                 sg_bandwidth_factor *
 517                                 (nw_link->lmm_resource.power.peak *
 518                                  nw_link->lmm_resource.power.scale));
 519 #ifdef HAVE_TRACING
 520     TRACE_surf_link_set_bandwidth(date, nw_link->lmm_resource.generic_resource.name,
 521                                   sg_bandwidth_factor *
 522                                   (nw_link->lmm_resource.power.peak *
 523                                    nw_link->lmm_resource.power.scale));
 524 #endif
 525     if (sg_weight_S_parameter > 0) {
 526       while ((var = lmm_get_var_from_cnst
 527               (network_maxmin_system, nw_link->lmm_resource.constraint,
 528                &elem))) {
 529         action = lmm_variable_id(var);
 530         action->weight += delta;
 531         if (!(action->suspended))
 532           lmm_update_variable_weight(network_maxmin_system,
 533                                      action->variable, action->weight);
 534       }
 535     }
 536     if (tmgr_trace_event_free(event_type))
 537       nw_link->lmm_resource.power.event = NULL;
 538   } else if (event_type == nw_link->lat_event) {
 539     double delta = value - nw_link->lat_current;
 540     lmm_variable_t var = NULL;
 541     lmm_element_t elem = NULL;
 542     surf_action_network_CM02_t action = NULL;
 543
 544     nw_link->lat_current = value;
 545     while ((var = lmm_get_var_from_cnst
 546             (network_maxmin_system, nw_link->lmm_resource.constraint,
 547              &elem))) {
 548       action = lmm_variable_id(var);
 549       action->lat_current += delta;
 550       action->weight += delta;
 551       if (action->rate < 0)
 552         lmm_update_variable_bound(network_maxmin_system, action->variable,
 553                                   sg_tcp_gamma / (2.0 *
 554                                                   action->lat_current));
 555       else {
 556         lmm_update_variable_bound(network_maxmin_system, action->variable,
 557                                   min(action->rate,
 558                                       sg_tcp_gamma / (2.0 *
 559                                                       action->lat_current)));
 560
 561         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 562           XBT_INFO("Flow is limited BYBANDWIDTH");
 563         } else {
 564           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 565                 action->lat_current);
 566         }
 567       }
 568       if (!(action->suspended))
 569         lmm_update_variable_weight(network_maxmin_system, action->variable,
 570                                    action->weight);
 571
 572     }
 573     if (tmgr_trace_event_free(event_type))
 574       nw_link->lat_event = NULL;
 575   } else if (event_type == nw_link->lmm_resource.state_event) {
 576     if (value > 0)
 577       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 578     else {
 579       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 580       lmm_variable_t var = NULL;
 581       lmm_element_t elem = NULL;
 582
 583       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 584       while ((var = lmm_get_var_from_cnst
 585               (network_maxmin_system, cnst, &elem))) {
 586         surf_action_t action = lmm_variable_id(var);
 587
 588         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 589             surf_action_state_get(action) == SURF_ACTION_READY) {
 590           action->finish = date;
 591           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 592         }
 593       }
 594     }
 595     if (tmgr_trace_event_free(event_type))
 596       nw_link->lmm_resource.state_event = NULL;
 597   } else {
 598     XBT_CRITICAL("Unknown event ! \n");
 599     xbt_abort();
 600   }
 601
 602   return;
 603 }
 604
 605
 606 static surf_action_t net_communicate(const char *src_name,
 607                                      const char *dst_name, double size,
 608                                      double rate)
 609 {
 610   unsigned int i;
 611   link_CM02_t link;
 612   int failed = 0;
 613   surf_action_network_CM02_t action = NULL;
 614   double bandwidth_bound;
 615   double latency=0.0;
 616   /* LARGE PLATFORMS HACK:
 617      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 618      Use the cluster_id for ->id */
 619
 620   xbt_dynar_t back_route = NULL;
 621   int constraints_per_variable = 0;
 622   xbt_dynar_t route;
 623   // I will need this route for some time so require for no cleanup
 624   global_routing->get_route_latency(src_name, dst_name, &route, &latency, 0);
 625
 626   if (sg_network_fullduplex == 1) {
 627     back_route = global_routing->get_route(dst_name, src_name);
 628   }
 629
 630   /* LARGE PLATFORMS HACK:
 631      total_route_size = route_size + src->link_nb + dst->nb */
 632
 633   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 634   /* LARGE PLATFORMS HACK:
 635      assert on total_route_size */
 636   xbt_assert(xbt_dynar_length(route) || latency,
 637               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 638               src_name, dst_name);
 639
 640   xbt_dynar_foreach(route, i, link) {
 641     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 642       failed = 1;
 643       break;
 644     }
 645   }
 646   action =
 647       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 648                       surf_network_model, failed);
 649 #ifdef HAVE_LATENCY_BOUND_TRACKING
 650   (action->generic_action).latency_limited = 0;
 651 #endif
 652   action->weight = action->latency = latency;
 653
 654   xbt_swag_insert(action, action->generic_action.state_set);
 655   action->rate = rate;
 656
 657   bandwidth_bound = -1.0;
 658
 659   xbt_dynar_foreach(route, i, link) {
 660     action->weight +=
 661         sg_weight_S_parameter /
 662         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 663     if (bandwidth_bound < 0.0)
 664       bandwidth_bound =
 665           (*bandwidth_factor_callback) (size) *
 666           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 667     else
 668       bandwidth_bound =
 669           min(bandwidth_bound,
 670               (*bandwidth_factor_callback) (size) *
 671               (link->lmm_resource.power.peak *
 672                link->lmm_resource.power.scale));
 673   }
 674   /* LARGE PLATFORMS HACK:
 675      Add src->link and dst->link latencies */
 676   action->lat_current = action->latency;
 677   action->latency *= (*latency_factor_callback) (size);
 678   action->rate =
 679       (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
 680                                         size);
 681
 682   if(xbt_dynar_length(route) > 0) {
 683     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 684     gap_append(size, link, action);
 685     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 686            action, src_name, dst_name, action->sender.gap, action->latency);
 687   } else {
 688     gap_unknown(action);
 689   }
 690
 691
 692   /* LARGE PLATFORMS HACK:
 693      lmm_variable_new(..., total_route_size) */
 694   if (back_route != NULL) {
 695     constraints_per_variable =
 696         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 697   } else {
 698     constraints_per_variable = xbt_dynar_length(route);
 699   }
 700
 701   if (action->latency > 0)
 702     action->variable =
 703         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 704                          constraints_per_variable);
 705   else
 706     action->variable =
 707         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 708                          constraints_per_variable);
 709
 710   if (action->rate < 0) {
 711     if (action->lat_current > 0)
 712       lmm_update_variable_bound(network_maxmin_system, action->variable,
 713                                 sg_tcp_gamma / (2.0 *
 714                                                 action->lat_current));
 715     else
 716       lmm_update_variable_bound(network_maxmin_system, action->variable,
 717                                 -1.0);
 718   } else {
 719     if (action->lat_current > 0)
 720       lmm_update_variable_bound(network_maxmin_system, action->variable,
 721                                 min(action->rate,
 722                                     sg_tcp_gamma / (2.0 *
 723                                                     action->lat_current)));
 724     else
 725       lmm_update_variable_bound(network_maxmin_system, action->variable,
 726                                 action->rate);
 727   }
 728
 729   xbt_dynar_foreach(route, i, link) {
 730     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 731                action->variable, 1.0);
 732   }
 733
 734   if (sg_network_fullduplex == 1) {
 735     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 736     xbt_dynar_foreach(back_route, i, link) {
 737       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 738                  action->variable, .05);
 739     }
 740   }
 741   /* LARGE PLATFORMS HACK:
 742      expand also with src->link and dst->link */
 743 #ifdef HAVE_TRACING
 744   if (TRACE_is_enabled()) {
 745     action->src_name = xbt_strdup(src_name);
 746     action->dst_name = xbt_strdup(dst_name);
 747   } else {
 748     action->src_name = action->dst_name = NULL;
 749   }
 750 #endif
 751
 752   xbt_dynar_free(&route);
 753   XBT_OUT();
 754
 755   return (surf_action_t) action;
 756 }
 757
 758 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 759 {
 760   return global_routing->get_route(src, dst);
 761 }
 762
 763 static double net_get_link_bandwidth(const void *link)
 764 {
 765   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 766   return lmm->power.peak * lmm->power.scale;
 767 }
 768
 769 static double net_get_link_latency(const void *link)
 770 {
 771   return ((link_CM02_t) link)->lat_current;
 772 }
 773
 774 static int net_link_shared(const void *link)
 775 {
 776   return
 777       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 778 }
 779
 780 static void net_action_suspend(surf_action_t action)
 781 {
 782   ((surf_action_network_CM02_t) action)->suspended = 1;
 783   lmm_update_variable_weight(network_maxmin_system,
 784                              ((surf_action_network_CM02_t)
 785                               action)->variable, 0.0);
 786 }
 787
 788 static void net_action_resume(surf_action_t action)
 789 {
 790   if (((surf_action_network_CM02_t) action)->suspended) {
 791     lmm_update_variable_weight(network_maxmin_system,
 792                                ((surf_action_network_CM02_t)
 793                                 action)->variable,
 794                                ((surf_action_network_CM02_t)
 795                                 action)->weight);
 796     ((surf_action_network_CM02_t) action)->suspended = 0;
 797   }
 798 }
 799
 800 static int net_action_is_suspended(surf_action_t action)
 801 {
 802   return ((surf_action_network_CM02_t) action)->suspended;
 803 }
 804
 805 void net_action_set_max_duration(surf_action_t action, double duration)
 806 {
 807   action->max_duration = duration;
 808 }
 809
 810 #ifdef HAVE_TRACING
 811 static void net_action_set_category(surf_action_t action, const char *category)
 812 {
 813   action->category = xbt_strdup (category);
 814 }
 815 #endif
 816
 817 static void net_finalize(void)
 818 {
 819   surf_model_exit(surf_network_model);
 820   surf_network_model = NULL;
 821
 822   global_routing->finalize();
 823
 824   lmm_system_free(network_maxmin_system);
 825   network_maxmin_system = NULL;
 826 }
 827
 828 static void surf_network_model_init_internal(void)
 829 {
 830   surf_network_model = surf_model_init();
 831
 832   surf_network_model->name = "network";
 833   surf_network_model->action_unref = net_action_unref;
 834   surf_network_model->action_cancel = net_action_cancel;
 835   surf_network_model->action_recycle = net_action_recycle;
 836   surf_network_model->get_remains = net_action_get_remains;
 837 #ifdef HAVE_LATENCY_BOUND_TRACKING
 838   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 839 #endif
 840
 841   surf_network_model->model_private->resource_used = net_resource_used;
 842   surf_network_model->model_private->share_resources = net_share_resources;
 843   surf_network_model->model_private->update_actions_state =
 844       net_update_actions_state;
 845   surf_network_model->model_private->update_resource_state =
 846       net_update_resource_state;
 847   surf_network_model->model_private->finalize = net_finalize;
 848
 849   surf_network_model->suspend = net_action_suspend;
 850   surf_network_model->resume = net_action_resume;
 851   surf_network_model->is_suspended = net_action_is_suspended;
 852   surf_network_model->set_max_duration = net_action_set_max_duration;
 853 #ifdef HAVE_TRACING
 854   surf_network_model->set_category = net_action_set_category;
 855 #endif
 856
 857   surf_network_model->extension.network.communicate = net_communicate;
 858   surf_network_model->extension.network.get_route = net_get_route;
 859   surf_network_model->extension.network.get_link_bandwidth =
 860       net_get_link_bandwidth;
 861   surf_network_model->extension.network.get_link_latency =
 862       net_get_link_latency;
 863   surf_network_model->extension.network.link_shared = net_link_shared;
 864   surf_network_model->extension.network.add_traces = net_add_traces;
 865   surf_network_model->extension.network.create_resource =
 866       net_create_resource;
 867
 868   if (!network_maxmin_system)
 869     network_maxmin_system = lmm_system_new();
 870
 871   routing_model_create(sizeof(link_CM02_t),
 872                        net_link_new(xbt_strdup("__loopback__"),
 873                                     498000000, NULL, 0.000015, NULL,
 874                                     SURF_RESOURCE_ON, NULL,
 875                                     SURF_LINK_FATPIPE, NULL),
 876                        net_get_link_latency);
 877 }
 878
 879
 880
 881 /************************************************************************/
 882 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 883 /************************************************************************/
 884 void surf_network_model_init_SMPI(const char *filename)
 885 {
 886
 887   if (surf_network_model)
 888     return;
 889   surf_network_model_init_internal();
 890   latency_factor_callback = &smpi_latency_factor;
 891   bandwidth_factor_callback = &smpi_bandwidth_factor;
 892   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 893   net_define_callbacks(filename);
 894   xbt_dynar_push(model_list, &surf_network_model);
 895   network_solve = lmm_solve;
 896
 897   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
 898   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 899
 900   update_model_description(surf_network_model_description,
 901                            "SMPI", surf_network_model);
 902 }
 903
 904 /************************************************************************/
 905 /* New model based on optimizations discussed during this thesis        */
 906 /************************************************************************/
 907 void surf_network_model_init_LegrandVelho(const char *filename)
 908 {
 909
 910   if (surf_network_model)
 911     return;
 912   surf_network_model_init_internal();
 913   net_define_callbacks(filename);
 914   xbt_dynar_push(model_list, &surf_network_model);
 915   network_solve = lmm_solve;
 916
 917   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 918   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 919                             0.92);
 920   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 921
 922   update_model_description(surf_network_model_description,
 923                            "LV08", surf_network_model);
 924 }
 925
 926 /***************************************************************************/
 927 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 928 /***************************************************************************/
 929 /* @TechReport{      rr-lip2002-40, */
 930 /*   author        = {Henri Casanova and Loris Marchal}, */
 931 /*   institution   = {LIP}, */
 932 /*   title         = {A Network Model for Simulation of Grid Application}, */
 933 /*   number        = {2002-40}, */
 934 /*   month         = {oct}, */
 935 /*   year          = {2002} */
 936 /* } */
 937 void surf_network_model_init_CM02(const char *filename)
 938 {
 939
 940   if (surf_network_model)
 941     return;
 942   surf_network_model_init_internal();
 943   net_define_callbacks(filename);
 944   xbt_dynar_push(model_list, &surf_network_model);
 945   network_solve = lmm_solve;
 946
 947   update_model_description(surf_network_model_description,
 948                            "CM02", surf_network_model);
 949 }
 950
 951 void surf_network_model_init_Reno(const char *filename)
 952 {
 953   if (surf_network_model)
 954     return;
 955   surf_network_model_init_internal();
 956   net_define_callbacks(filename);
 957
 958   xbt_dynar_push(model_list, &surf_network_model);
 959   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 960                                     func_reno_fpi);
 961   network_solve = lagrange_solve;
 962
 963   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 964   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 965                             0.92);
 966   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 967
 968   update_model_description(surf_network_model_description,
 969                            "Reno", surf_network_model);
 970 }
 971
 972
 973 void surf_network_model_init_Reno2(const char *filename)
 974 {
 975   if (surf_network_model)
 976     return;
 977   surf_network_model_init_internal();
 978   net_define_callbacks(filename);
 979
 980   xbt_dynar_push(model_list, &surf_network_model);
 981   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 982                                     func_reno2_fpi);
 983   network_solve = lagrange_solve;
 984
 985   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
 986   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
 987                             0.92);
 988   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
 989                             8775);
 990
 991   update_model_description(surf_network_model_description,
 992                            "Reno2", surf_network_model);
 993 }
 994
 995 void surf_network_model_init_Vegas(const char *filename)
 996 {
 997   if (surf_network_model)
 998     return;
 999   surf_network_model_init_internal();
1000   net_define_callbacks(filename);
1001
1002   xbt_dynar_push(model_list, &surf_network_model);
1003   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1004                                     func_vegas_fpi);
1005   network_solve = lagrange_solve;
1006
1007   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1008   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1009                             0.92);
1010   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1011
1012   update_model_description(surf_network_model_description,
1013                            "Vegas", surf_network_model);
1014 }