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