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