src/surf/network.c

   1
   2 /*
   3  * Network with improved management of tasks, IM (Improved Management).
   4  * Uses a heap to store actions so that the share_resources is faster.
   5  * This model automatically sets the selective update flag to 1 and is
   6  * highly dependent on the maxmin lmm module.
   7  */
   8
   9 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
  10  * All rights reserved.                                                     */
  11
  12 /* This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the license (GNU LGPL) which comes with this package. */
  14
  15 #include "network_private.h"
  16 #include "xbt/log.h"
  17 #include "xbt/str.h"
  18
  19 #include "surf_private.h"
  20 #include "xbt/dict.h"
  21 #include "maxmin_private.h"
  22 #include "surf/surfxml_parse_values.h"
  23 #include "surf/surf_resource.h"
  24 #include "surf/surf_resource_lmm.h"
  25 #include "simgrid/sg_config.h"
  26
  27 #undef GENERIC_LMM_ACTION
  28 #undef GENERIC_ACTION
  29 #define GENERIC_LMM_ACTION(action) (action)->generic_lmm_action
  30 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  31
  32
  33 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  34                                 "Logging specific to the SURF network module");
  35
  36 surf_model_t surf_network_model = NULL;
  37 static void (*network_solve) (lmm_system_t) = NULL;
  38
  39 xbt_dynar_t smpi_bw_factor = NULL;
  40 xbt_dynar_t smpi_lat_factor = NULL;
  41
  42 typedef struct s_smpi_factor *smpi_factor_t;
  43 typedef struct s_smpi_factor {
  44   long factor;
  45   double value;
  46 } s_smpi_factor_t;
  47
  48
  49 double sg_sender_gap = 0.0;
  50 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  51 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  52 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  53
  54 double sg_tcp_gamma = 0.0;
  55 int sg_network_crosstraffic = 0;
  56
  57 xbt_dict_t gap_lookup = NULL;
  58
  59 /******************************************************************************/
  60 /*                           Factors callbacks                                */
  61 /******************************************************************************/
  62 static double constant_latency_factor(double size)
  63 {
  64   return sg_latency_factor;
  65 }
  66
  67 static double constant_bandwidth_factor(double size)
  68 {
  69   return sg_bandwidth_factor;
  70 }
  71
  72 static double constant_bandwidth_constraint(double rate, double bound,
  73                                             double size)
  74 {
  75   return rate;
  76 }
  77
  78 /**********************/
  79 /*   SMPI callbacks   */
  80 /**********************/
  81
  82 static int factor_cmp(const void *pa, const void *pb)
  83 {
  84   return (((s_smpi_factor_t*)pa)->factor > ((s_smpi_factor_t*)pb)->factor);
  85 }
  86
  87
  88 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
  89 {
  90   char *value = NULL;
  91   unsigned int iter = 0;
  92   s_smpi_factor_t fact;
  93   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
  94
  95   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
  96   radical_elements = xbt_str_split(smpi_coef_string, ";");
  97   xbt_dynar_foreach(radical_elements, iter, value) {
  98
  99     radical_elements2 = xbt_str_split(value, ":");
 100     if (xbt_dynar_length(radical_elements2) != 2)
 101       xbt_die("Malformed radical for smpi factor!");
 102     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 103     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 104     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 105     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 106     xbt_dynar_free(&radical_elements2);
 107   }
 108   xbt_dynar_free(&radical_elements);
 109   iter=0;
 110   xbt_dynar_sort(smpi_factor, &factor_cmp);
 111   xbt_dynar_foreach(smpi_factor, iter, fact) {
 112     XBT_DEBUG("ordered smpi_factor:\t%ld : %f", fact.factor, fact.value);
 113
 114   }
 115   return smpi_factor;
 116 }
 117
 118 static double smpi_bandwidth_factor(double size)
 119 {
 120   if (!smpi_bw_factor)
 121     smpi_bw_factor =
 122         parse_factor(sg_cfg_get_string("smpi/bw_factor"));
 123
 124   unsigned int iter = 0;
 125   s_smpi_factor_t fact;
 126   double current=1.0;
 127   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 128     if (size <= fact.factor) {
 129       XBT_DEBUG("%lf <= %ld return %f", size, fact.factor, current);
 130       return current;
 131     }else
 132       current=fact.value;
 133   }
 134   XBT_DEBUG("%lf > %ld return %f", size, fact.factor, current);
 135
 136   return current;
 137 }
 138
 139 static double smpi_latency_factor(double size)
 140 {
 141   if (!smpi_lat_factor)
 142     smpi_lat_factor =
 143         parse_factor(sg_cfg_get_string("smpi/lat_factor"));
 144
 145   unsigned int iter = 0;
 146   s_smpi_factor_t fact;
 147   double current=1.0;
 148   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 149     if (size <= fact.factor) {
 150       XBT_DEBUG("%lf <= %ld return %f", size, fact.factor, current);
 151       return current;
 152     }else
 153       current=fact.value;
 154   }
 155   XBT_DEBUG("%lf > %ld return %f", size, fact.factor, current);
 156
 157   return current;
 158 }
 159
 160 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 161
 162 static double smpi_bandwidth_constraint(double rate, double bound,
 163                                         double size)
 164 {
 165   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 166 }
 167
 168 static double (*latency_factor_callback) (double) =
 169     &constant_latency_factor;
 170 static double (*bandwidth_factor_callback) (double) =
 171     &constant_bandwidth_factor;
 172 static double (*bandwidth_constraint_callback) (double, double, double) =
 173     &constant_bandwidth_constraint;
 174
 175 static void (*gap_append) (double, const link_CM02_t,
 176                            surf_action_network_CM02_t) = NULL;
 177
 178 static void *net_create_resource(const char *name,
 179                                  double bw_initial,
 180                                  tmgr_trace_t bw_trace,
 181                                  double lat_initial,
 182                                  tmgr_trace_t lat_trace,
 183                                  e_surf_resource_state_t
 184                                  state_initial,
 185                                  tmgr_trace_t state_trace,
 186                                  e_surf_link_sharing_policy_t
 187                                  policy, xbt_dict_t properties)
 188 {
 189   link_CM02_t nw_link = (link_CM02_t)
 190       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 191                             surf_network_model, name, properties,
 192                             surf_network_model->model_private->maxmin_system,
 193                             sg_bandwidth_factor * bw_initial,
 194                             history,
 195                             state_initial, state_trace,
 196                             bw_initial, bw_trace);
 197
 198   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 199              "Link '%s' declared several times in the platform file.",
 200              name);
 201
 202   nw_link->lat_current = lat_initial;
 203   if (lat_trace)
 204     nw_link->lat_event =
 205         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 206
 207   if (policy == SURF_LINK_FATPIPE)
 208     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 209
 210   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 211   XBT_DEBUG("Create link '%s'",name);
 212
 213   return nw_link;
 214 }
 215
 216 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 217 {
 218   if (link->policy == SURF_LINK_FULLDUPLEX) {
 219     char *link_id;
 220     link_id = bprintf("%s_UP", link->id);
 221     net_create_resource(link_id,
 222                         link->bandwidth,
 223                         link->bandwidth_trace,
 224                         link->latency,
 225                         link->latency_trace,
 226                         link->state,
 227                         link->state_trace, link->policy, link->properties);
 228     xbt_free(link_id);
 229     link_id = bprintf("%s_DOWN", link->id);
 230     net_create_resource(link_id,
 231                         link->bandwidth,
 232                         link->bandwidth_trace,
 233                         link->latency,
 234                         link->latency_trace,
 235                         link->state,
 236                         link->state_trace, link->policy, link->properties);
 237     xbt_free(link_id);
 238   } else {
 239     net_create_resource(link->id,
 240                         link->bandwidth,
 241                         link->bandwidth_trace,
 242                         link->latency,
 243                         link->latency_trace,
 244                         link->state,
 245                         link->state_trace, link->policy, link->properties);
 246   }
 247 }
 248
 249 static void net_add_traces(void)
 250 {
 251   xbt_dict_cursor_t cursor = NULL;
 252   char *trace_name, *elm;
 253
 254   static int called = 0;
 255   if (called)
 256     return;
 257   called = 1;
 258
 259   /* connect all traces relative to network */
 260   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 261     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 262     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 263
 264     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 265                trace_name, elm);
 266     xbt_assert(trace,
 267                "Cannot connect trace %s to link %s: trace undefined",
 268                trace_name, elm);
 269
 270     link->lmm_resource.state_event =
 271         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 272   }
 273
 274   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 275     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 276     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 277
 278     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 279                trace_name, elm);
 280     xbt_assert(trace,
 281                "Cannot connect trace %s to link %s: trace undefined",
 282                trace_name, elm);
 283
 284     link->lmm_resource.power.event =
 285         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 286   }
 287
 288   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 289     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 290     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 291
 292     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 293                trace_name, elm);
 294     xbt_assert(trace,
 295                "Cannot connect trace %s to link %s: trace undefined",
 296                trace_name, elm);
 297
 298     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 299   }
 300 }
 301
 302 static void net_define_callbacks(void)
 303 {
 304   /* Figuring out the network links */
 305   sg_platf_link_add_cb(net_parse_link_init);
 306   sg_platf_postparse_add_cb(net_add_traces);
 307 }
 308
 309 static int net_resource_used(void *resource_id)
 310 {
 311   return lmm_constraint_used(surf_network_model->model_private->maxmin_system, ((surf_resource_lmm_t)
 312                                                      resource_id)->
 313                              constraint);
 314 }
 315
 316 void net_action_recycle(surf_action_t action)
 317 {
 318   return;
 319 }
 320
 321 #ifdef HAVE_LATENCY_BOUND_TRACKING
 322 int net_get_link_latency_limited(surf_action_t action)
 323 {
 324   return action->latency_limited;
 325 }
 326 #endif
 327
 328 static double net_share_resources_full(double now)
 329 {
 330   s_surf_action_lmm_t s_action;
 331   surf_action_network_CM02_t action = NULL;
 332   xbt_swag_t running_actions =
 333       surf_network_model->states.running_action_set;
 334   double min;
 335
 336   min = generic_maxmin_share_resources(running_actions,
 337                                        xbt_swag_offset(s_action,
 338                                                        variable),
 339                                                        surf_network_model->model_private->maxmin_system,
 340                                        network_solve);
 341
 342 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 343
 344   xbt_swag_foreach(action, running_actions) {
 345 #ifdef HAVE_LATENCY_BOUND_TRACKING
 346     if (lmm_is_variable_limited_by_latency(GENERIC_LMM_ACTION(action).variable)) {
 347       action->latency_limited = 1;
 348     } else {
 349       action->latency_limited = 0;
 350     }
 351 #endif
 352     if (action->latency > 0) {
 353       min = (min < 0) ? action->latency : min(min, action->latency);
 354     }
 355   }
 356
 357   XBT_DEBUG("Min of share resources %f", min);
 358
 359   return min;
 360 }
 361
 362 static double net_share_resources_lazy(double now)
 363 {
 364   return generic_share_resources_lazy(now, surf_network_model);
 365 }
 366
 367 static void net_update_actions_state_full(double now, double delta)
 368 {
 369   generic_update_actions_state_full(now, delta, surf_network_model);
 370 }
 371
 372 static void net_update_actions_state_lazy(double now, double delta)
 373 {
 374   generic_update_actions_state_lazy(now, delta, surf_network_model);
 375 }
 376
 377 static void net_update_resource_state(void *id,
 378                                       tmgr_trace_event_t event_type,
 379                                       double value, double date)
 380 {
 381   link_CM02_t nw_link = id;
 382   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 383   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 384   /*     value, event_type); */
 385
 386   if (event_type == nw_link->lmm_resource.power.event) {
 387     double delta =
 388         sg_weight_S_parameter / value - sg_weight_S_parameter /
 389         (nw_link->lmm_resource.power.peak *
 390          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(surf_network_model->model_private->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,
 403                                   (char
 404                                    *) (((nw_link->lmm_resource).
 405                                         generic_resource).name),
 406                                   sg_bandwidth_factor *
 407                                   (nw_link->lmm_resource.power.peak *
 408                                    nw_link->lmm_resource.power.scale));
 409 #endif
 410     if (sg_weight_S_parameter > 0) {
 411       while ((var = lmm_get_var_from_cnst
 412               (surf_network_model->model_private->maxmin_system, nw_link->lmm_resource.constraint,
 413                &elem))) {
 414         action = lmm_variable_id(var);
 415         action->weight += delta;
 416         if (!(GENERIC_LMM_ACTION(action).suspended))
 417           lmm_update_variable_weight(surf_network_model->model_private->maxmin_system,
 418                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 419       }
 420     }
 421     if (tmgr_trace_event_free(event_type))
 422       nw_link->lmm_resource.power.event = NULL;
 423   } else if (event_type == nw_link->lat_event) {
 424     double delta = value - nw_link->lat_current;
 425     lmm_variable_t var = NULL;
 426     lmm_element_t elem = NULL;
 427     surf_action_network_CM02_t action = NULL;
 428
 429     nw_link->lat_current = value;
 430     while ((var = lmm_get_var_from_cnst
 431             (surf_network_model->model_private->maxmin_system, nw_link->lmm_resource.constraint,
 432              &elem))) {
 433       action = lmm_variable_id(var);
 434       action->lat_current += delta;
 435       action->weight += delta;
 436       if (action->rate < 0)
 437         lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 438                                   sg_tcp_gamma / (2.0 *
 439                                                   action->lat_current));
 440       else {
 441         lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 442                                   min(action->rate,
 443                                       sg_tcp_gamma / (2.0 *
 444                                                       action->
 445                                                       lat_current)));
 446
 447         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 448           XBT_INFO("Flow is limited BYBANDWIDTH");
 449         } else {
 450           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 451                    action->lat_current);
 452         }
 453       }
 454       if (!(GENERIC_LMM_ACTION(action).suspended))
 455         lmm_update_variable_weight(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 456                                    action->weight);
 457
 458     }
 459     if (tmgr_trace_event_free(event_type))
 460       nw_link->lat_event = NULL;
 461   } else if (event_type == nw_link->lmm_resource.state_event) {
 462     if (value > 0)
 463       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 464     else {
 465       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 466       lmm_variable_t var = NULL;
 467       lmm_element_t elem = NULL;
 468
 469       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 470       while ((var = lmm_get_var_from_cnst
 471               (surf_network_model->model_private->maxmin_system, cnst, &elem))) {
 472         surf_action_t action = lmm_variable_id(var);
 473
 474         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 475             surf_action_state_get(action) == SURF_ACTION_READY) {
 476           action->finish = date;
 477           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 478         }
 479       }
 480     }
 481     if (tmgr_trace_event_free(event_type))
 482       nw_link->lmm_resource.state_event = NULL;
 483   } else {
 484     XBT_CRITICAL("Unknown event ! \n");
 485     xbt_abort();
 486   }
 487
 488   XBT_DEBUG
 489       ("There were a resource state event, need to update actions related to the constraint (%p)",
 490        nw_link->lmm_resource.constraint);
 491   return;
 492 }
 493
 494
 495 static surf_action_t net_communicate(sg_routing_edge_t src,
 496                                      sg_routing_edge_t dst,
 497                                      double size, double rate)
 498 {
 499   unsigned int i;
 500   link_CM02_t link;
 501   int failed = 0;
 502   surf_action_network_CM02_t action = NULL;
 503   double bandwidth_bound;
 504   double latency = 0.0;
 505   xbt_dynar_t back_route = NULL;
 506   int constraints_per_variable = 0;
 507
 508   xbt_dynar_t route = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
 509
 510   XBT_IN("(%s,%s,%g,%g)", src->name, dst->name, size, rate);
 511
 512   routing_get_route_and_latency(src, dst, &route, &latency);
 513   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 514              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 515              src->name, dst->name);
 516
 517   xbt_dynar_foreach(route, i, link) {
 518     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 519       failed = 1;
 520       break;
 521     }
 522   }
 523   if (sg_network_crosstraffic == 1) {
 524     routing_get_route_and_latency(dst, src, &back_route, NULL);
 525     xbt_dynar_foreach(back_route, i, link) {
 526       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 527         failed = 1;
 528         break;
 529       }
 530     }
 531   }
 532
 533   action =
 534       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 535                       surf_network_model, failed);
 536 #ifdef HAVE_LATENCY_BOUND_TRACKING
 537   action->latency_limited = 0;
 538 #endif
 539   action->weight = action->latency = latency;
 540
 541   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 542   action->rate = rate;
 543   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 544     GENERIC_LMM_ACTION(action).index_heap = -1;
 545     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 546   }
 547
 548   bandwidth_bound = -1.0;
 549   if (sg_weight_S_parameter > 0) {
 550     xbt_dynar_foreach(route, i, link) {
 551       action->weight +=
 552           sg_weight_S_parameter /
 553           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 554     }
 555   }
 556   xbt_dynar_foreach(route, i, link) {
 557     double bb = bandwidth_factor_callback(size) *
 558         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 559     bandwidth_bound =
 560         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 561   }
 562
 563   action->lat_current = action->latency;
 564   action->latency *= latency_factor_callback(size);
 565   action->rate =
 566       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 567   if (gap_append) {
 568     xbt_assert(!xbt_dynar_is_empty(route),
 569                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 570
 571     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 572     gap_append(size, link, action);
 573     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 574               action, src->name, dst->name, action->sender.gap,
 575               action->latency);
 576   }
 577
 578   constraints_per_variable = xbt_dynar_length(route);
 579   if (back_route != NULL)
 580     constraints_per_variable += xbt_dynar_length(back_route);
 581
 582   if (action->latency > 0) {
 583     GENERIC_LMM_ACTION(action).variable =
 584         lmm_variable_new(surf_network_model->model_private->maxmin_system, action, 0.0, -1.0,
 585                          constraints_per_variable);
 586     if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 587       // add to the heap the event when the latency is payed
 588       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 589                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 590       surf_action_lmm_heap_insert(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action, action->latency + GENERIC_LMM_ACTION(action).last_update,
 591                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 592     }
 593   } else
 594     GENERIC_LMM_ACTION(action).variable =
 595         lmm_variable_new(surf_network_model->model_private->maxmin_system, action, 1.0, -1.0,
 596                          constraints_per_variable);
 597
 598   if (action->rate < 0) {
 599     lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 600                               (action->lat_current > 0) ?
 601                               sg_tcp_gamma / (2.0 *
 602                                               action->lat_current) : -1.0);
 603   } else {
 604     lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 605                               (action->lat_current > 0) ?
 606                               min(action->rate,
 607                                   sg_tcp_gamma / (2.0 *
 608                                                   action->lat_current))
 609                               : action->rate);
 610   }
 611
 612   xbt_dynar_foreach(route, i, link) {
 613     lmm_expand(surf_network_model->model_private->maxmin_system, link->lmm_resource.constraint,
 614                GENERIC_LMM_ACTION(action).variable, 1.0);
 615   }
 616
 617   if (sg_network_crosstraffic == 1) {
 618     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 619     xbt_dynar_foreach(back_route, i, link) {
 620       lmm_expand(surf_network_model->model_private->maxmin_system, link->lmm_resource.constraint,
 621                  GENERIC_LMM_ACTION(action).variable, .05);
 622     }
 623   }
 624
 625   xbt_dynar_free(&route);
 626   XBT_OUT();
 627
 628   return (surf_action_t) action;
 629 }
 630
 631 static xbt_dynar_t net_get_route(void *src, void *dst)
 632 {
 633   xbt_dynar_t route = NULL;
 634   routing_get_route_and_latency(src, dst, &route, NULL);
 635   return route;
 636 }
 637
 638 static double net_get_link_bandwidth(const void *link)
 639 {
 640   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 641   return lmm->power.peak * lmm->power.scale;
 642 }
 643
 644 static double net_get_link_latency(const void *link)
 645 {
 646   return ((link_CM02_t) link)->lat_current;
 647 }
 648
 649 static int net_link_shared(const void *link)
 650 {
 651   return
 652       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 653 }
 654
 655 static void net_finalize(void)
 656 {
 657   lmm_system_free(surf_network_model->model_private->maxmin_system);
 658   surf_network_model->model_private->maxmin_system = NULL;
 659
 660   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 661     xbt_heap_free(surf_network_model->model_private->action_heap);
 662     xbt_swag_free(surf_network_model->model_private->modified_set);
 663   }
 664
 665   surf_model_exit(surf_network_model);
 666   surf_network_model = NULL;
 667
 668   xbt_dict_free(&gap_lookup);
 669   xbt_dynar_free(&smpi_bw_factor);
 670   xbt_dynar_free(&smpi_lat_factor);
 671 }
 672
 673 static void smpi_gap_append(double size, const link_CM02_t link,
 674                             surf_action_network_CM02_t action)
 675 {
 676   const char *src = link->lmm_resource.generic_resource.name;
 677   xbt_fifo_t fifo;
 678   //surf_action_network_CM02_t last_action;
 679   //double bw;
 680
 681   if (sg_sender_gap > 0.0) {
 682     if (!gap_lookup) {
 683       gap_lookup = xbt_dict_new();
 684     }
 685     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
 686     action->sender.gap = 0.0;
 687     if (fifo && xbt_fifo_size(fifo) > 0) {
 688       /* Compute gap from last send */
 689       /*last_action =
 690           (surf_action_network_CM02_t)
 691           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));*/
 692      // bw = net_get_link_bandwidth(link);
 693       action->sender.gap = sg_sender_gap;
 694         /*  max(sg_sender_gap,last_action->sender.size / bw);*/
 695       action->latency += action->sender.gap;
 696     }
 697     /* Append action as last send */
 698     /*action->sender.link_name = link->lmm_resource.generic_resource.name;
 699     fifo =
 700         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
 701                                           action->sender.link_name);
 702     if (!fifo) {
 703       fifo = xbt_fifo_new();
 704       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
 705     }
 706     action->sender.fifo_item = xbt_fifo_push(fifo, action);*/
 707     action->sender.size = size;
 708   }
 709 }
 710
 711 static void smpi_gap_remove(surf_action_lmm_t lmm_action)
 712 {
 713   xbt_fifo_t fifo;
 714   size_t size;
 715   surf_action_network_CM02_t action = (surf_action_network_CM02_t)(lmm_action);
 716
 717   if (sg_sender_gap > 0.0 && action->sender.link_name
 718       && action->sender.fifo_item) {
 719     fifo =
 720         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
 721                                           action->sender.link_name);
 722     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
 723     size = xbt_fifo_size(fifo);
 724     if (size == 0) {
 725       xbt_fifo_free(fifo);
 726       xbt_dict_remove(gap_lookup, action->sender.link_name);
 727       size = xbt_dict_length(gap_lookup);
 728       if (size == 0) {
 729         xbt_dict_free(&gap_lookup);
 730       }
 731     }
 732   }
 733 }
 734
 735 static void set_update_mechanism(void)
 736 {
 737   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 738   int select =
 739       xbt_cfg_get_int(_sg_cfg_set, "network/maxmin_selective_update");
 740
 741   if (!strcmp(optim, "Full")) {
 742     surf_network_model->model_private->update_mechanism = UM_FULL;
 743     surf_network_model->model_private->selective_update = select;
 744   } else if (!strcmp(optim, "Lazy")) {
 745     surf_network_model->model_private->update_mechanism = UM_LAZY;
 746     surf_network_model->model_private->selective_update = 1;
 747     xbt_assert((select == 1)
 748                ||
 749                (xbt_cfg_is_default_value
 750                 (_sg_cfg_set, "network/maxmin_selective_update")),
 751                "Disabling selective update while using the lazy update mechanism is dumb!");
 752   } else {
 753     xbt_die("Unsupported optimization (%s) for this model", optim);
 754   }
 755 }
 756
 757 static void surf_network_model_init_internal(void)
 758 {
 759   s_surf_action_network_CM02_t comm;
 760   surf_network_model = surf_model_init();
 761
 762   set_update_mechanism();
 763
 764   surf_network_model->name = "network";
 765   surf_network_model->action_unref = surf_action_unref;
 766   surf_network_model->action_cancel = surf_action_cancel;
 767   surf_network_model->action_recycle = net_action_recycle;
 768
 769   surf_network_model->get_remains = surf_action_get_remains;
 770
 771 #ifdef HAVE_LATENCY_BOUND_TRACKING
 772   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 773 #endif
 774 #ifdef HAVE_TRACING
 775   surf_network_model->set_category = surf_action_set_category;
 776 #endif
 777
 778   surf_network_model->model_private->resource_used = net_resource_used;
 779   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 780     surf_network_model->model_private->share_resources =
 781         net_share_resources_lazy;
 782     surf_network_model->model_private->update_actions_state =
 783         net_update_actions_state_lazy;
 784   } else if (surf_network_model->model_private->update_mechanism == UM_FULL) {
 785     surf_network_model->model_private->share_resources =
 786         net_share_resources_full;
 787     surf_network_model->model_private->update_actions_state =
 788         net_update_actions_state_full;
 789   }
 790
 791   surf_network_model->model_private->update_resource_state =
 792       net_update_resource_state;
 793   surf_network_model->model_private->finalize = net_finalize;
 794
 795   surf_network_model->suspend = surf_action_suspend;
 796   surf_network_model->resume = surf_action_resume;
 797   surf_network_model->is_suspended = surf_action_is_suspended;
 798   surf_cpu_model->set_max_duration = surf_action_set_max_duration;
 799
 800   surf_network_model->extension.network.communicate = net_communicate;
 801   surf_network_model->extension.network.get_route = net_get_route;
 802   surf_network_model->extension.network.get_link_bandwidth =
 803       net_get_link_bandwidth;
 804   surf_network_model->extension.network.get_link_latency =
 805       net_get_link_latency;
 806   surf_network_model->extension.network.link_shared = net_link_shared;
 807   surf_network_model->extension.network.add_traces = net_add_traces;
 808
 809   if (!surf_network_model->model_private->maxmin_system)
 810     surf_network_model->model_private->maxmin_system = lmm_system_new(surf_network_model->model_private->selective_update);
 811
 812   routing_model_create(net_create_resource("__loopback__",
 813                                            498000000, NULL, 0.000015, NULL,
 814                                            SURF_RESOURCE_ON, NULL,
 815                                            SURF_LINK_FATPIPE, NULL));
 816
 817   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 818     surf_network_model->model_private->action_heap = xbt_heap_new(8, NULL);
 819     xbt_heap_set_update_callback(surf_network_model->model_private->action_heap,
 820                                  surf_action_lmm_update_index_heap);
 821     surf_network_model->model_private->modified_set =
 822         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
 823     surf_network_model->model_private->maxmin_system->keep_track = surf_network_model->model_private->modified_set;
 824   }
 825
 826   surf_network_model->gap_remove = NULL;
 827 }
 828
 829 /************************************************************************/
 830 /* New model based on LV08 and experimental results of MPI ping-pongs   */
 831 /************************************************************************/
 832 /* @Inproceedings{smpi_ipdps, */
 833 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
 834 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
 835 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
 836 /*  address={Anchorage (Alaska) USA}, */
 837 /*  month=may, */
 838 /*  year={2011} */
 839 /*  } */
 840 void surf_network_model_init_SMPI(void)
 841 {
 842
 843   if (surf_network_model)
 844     return;
 845
 846   surf_network_model_init_internal();
 847   latency_factor_callback = &smpi_latency_factor;
 848   bandwidth_factor_callback = &smpi_bandwidth_factor;
 849   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
 850   gap_append = &smpi_gap_append;
 851   surf_network_model->gap_remove = &smpi_gap_remove;
 852   net_define_callbacks();
 853   xbt_dynar_push(model_list, &surf_network_model);
 854   network_solve = lmm_solve;
 855
 856   xbt_cfg_setdefault_double(_sg_cfg_set, "network/sender_gap", 10e-6);
 857   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 858 }
 859
 860 /************************************************************************/
 861 /* New model based on optimizations discussed during Pedro Velho's thesis*/
 862 /************************************************************************/
 863 /* @techreport{VELHO:2011:HAL-00646896:1, */
 864 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
 865 /*      title = {{Flow-level network models: have we reached the limits?}}, */
 866 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
 867 /*      type = {Rapport de recherche}, */
 868 /*      institution = {INRIA}, */
 869 /*      number = {RR-7821}, */
 870 /*      year = {2011}, */
 871 /*      month = Nov, */
 872 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
 873 /*  } */
 874 void surf_network_model_init_LegrandVelho(void)
 875 {
 876   if (surf_network_model)
 877     return;
 878
 879   surf_network_model_init_internal();
 880   net_define_callbacks();
 881   xbt_dynar_push(model_list, &surf_network_model);
 882   network_solve = lmm_solve;
 883
 884   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
 885                             13.01);
 886   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 887                             0.97);
 888   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
 889 }
 890
 891 /***************************************************************************/
 892 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 893 /***************************************************************************/
 894 /* @TechReport{      rr-lip2002-40, */
 895 /*   author        = {Henri Casanova and Loris Marchal}, */
 896 /*   institution   = {LIP}, */
 897 /*   title         = {A Network Model for Simulation of Grid Application}, */
 898 /*   number        = {2002-40}, */
 899 /*   month         = {oct}, */
 900 /*   year          = {2002} */
 901 /* } */
 902 void surf_network_model_init_CM02(void)
 903 {
 904
 905   if (surf_network_model)
 906     return;
 907
 908   surf_network_model_init_internal();
 909   net_define_callbacks();
 910   xbt_dynar_push(model_list, &surf_network_model);
 911   network_solve = lmm_solve;
 912
 913   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
 914   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 915                             1.0);
 916   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
 917 }
 918
 919 /***************************************************************************/
 920 /* The models from Steven H. Low                                           */
 921 /***************************************************************************/
 922 /* @article{Low03,                                                         */
 923 /*   author={Steven H. Low},                                               */
 924 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 925 /*   year={2003},                                                          */
 926 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 927 /*    volume={11}, number={4},                                             */
 928 /*  }                                                                      */
 929 void surf_network_model_init_Reno(void)
 930 {
 931   if (surf_network_model)
 932     return;
 933
 934   surf_network_model_init_internal();
 935   net_define_callbacks();
 936
 937   xbt_dynar_push(model_list, &surf_network_model);
 938   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 939                                     func_reno_fpi);
 940   network_solve = lagrange_solve;
 941
 942   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 943   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 944                             0.92);
 945   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 946 }
 947
 948
 949 void surf_network_model_init_Reno2(void)
 950 {
 951   if (surf_network_model)
 952     return;
 953
 954   surf_network_model_init_internal();
 955   net_define_callbacks();
 956
 957   xbt_dynar_push(model_list, &surf_network_model);
 958   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 959                                     func_reno2_fpi);
 960   network_solve = lagrange_solve;
 961
 962   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 963   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 964                             0.92);
 965   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S_parameter",
 966                             8775);
 967 }
 968
 969 void surf_network_model_init_Vegas(void)
 970 {
 971   if (surf_network_model)
 972     return;
 973
 974   surf_network_model_init_internal();
 975   net_define_callbacks();
 976
 977   xbt_dynar_push(model_list, &surf_network_model);
 978   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 979                                     func_vegas_fpi);
 980   network_solve = lagrange_solve;
 981
 982   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 983   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 984                             0.92);
 985   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 986 }