src/surf/network_ns3.cpp

   1 /* Copyright (c) 2007-2014. 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_ns3.hpp"
   8 #include "surf_private.h"
   9 #include "simgrid/sg_config.h"
  10
  11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_ns3, surf,
  12                                 "Logging specific to the SURF network NS3 module");
  13
  14 extern xbt_lib_t host_lib;
  15 extern xbt_lib_t link_lib;
  16 extern xbt_lib_t as_router_lib;
  17
  18 extern xbt_dict_t dict_socket;
  19
  20 xbt_dynar_t IPV4addr;
  21 static double time_to_next_flow_completion = -1;
  22
  23 /*************
  24  * Callbacks *
  25  *************/
  26
  27 static void replace_bdw_ns3(char ** bdw)
  28 {
  29   char *temp = xbt_strdup(*bdw);
  30   xbt_free(*bdw);
  31   *bdw = bprintf("%fBps",atof(temp));
  32   xbt_free(temp);
  33
  34 }
  35
  36 static void replace_lat_ns3(char ** lat)
  37 {
  38   char *temp = xbt_strdup(*lat);
  39   xbt_free(*lat);
  40   *lat = bprintf("%fs",atof(temp));
  41   xbt_free(temp);
  42 }
  43
  44 static void parse_ns3_add_host(sg_platf_host_cbarg_t host)
  45 {
  46   XBT_DEBUG("NS3_ADD_HOST '%s'",host->id);
  47   xbt_lib_set(host_lib,
  48               host->id,
  49               NS3_HOST_LEVEL,
  50               ns3_add_host(host->id)
  51     );
  52 }
  53
  54 static void parse_ns3_add_link(sg_platf_link_cbarg_t link)
  55 {
  56   XBT_DEBUG("NS3_ADD_LINK '%s'",link->id);
  57
  58   if(!IPV4addr) IPV4addr = xbt_dynar_new(sizeof(char*),free);
  59
  60   NetworkLinkPtr net_link = surf_network_model->createNetworkLink(link->id,
  61                                      link->bandwidth,
  62                                      link->bandwidth_trace,
  63                                      link->latency,
  64                                      link->latency_trace,
  65                                      link->state,
  66                                      link->state_trace,
  67                                      link->policy,
  68                                      link->properties);
  69
  70   xbt_lib_set(link_lib, link->id, SURF_LINK_LEVEL, net_link);
  71 }
  72
  73 static void parse_ns3_add_router(sg_platf_router_cbarg_t router)
  74 {
  75   XBT_DEBUG("NS3_ADD_ROUTER '%s'",router->id);
  76   xbt_lib_set(as_router_lib,
  77               router->id,
  78               NS3_ASR_LEVEL,
  79               ns3_add_router(router->id)
  80     );
  81 }
  82
  83 static void parse_ns3_add_AS(sg_platf_AS_cbarg_t AS)
  84 {
  85   XBT_DEBUG("NS3_ADD_AS '%s'",AS->id);
  86   xbt_lib_set(as_router_lib,
  87               AS->id,
  88               NS3_ASR_LEVEL,
  89               ns3_add_AS(AS->id)
  90     );
  91 }
  92
  93 static void parse_ns3_add_cluster(sg_platf_cluster_cbarg_t cluster)
  94 {
  95   const char *cluster_prefix = cluster->prefix;
  96   const char *cluster_suffix = cluster->suffix;
  97   const char *cluster_radical = cluster->radical;
  98   const char *cluster_bb_bw = bprintf("%f",cluster->bb_bw);
  99   const char *cluster_bb_lat = bprintf("%f",cluster->bb_lat);
 100   const char *cluster_bw = bprintf("%f",cluster->bw);
 101   const char *cluster_lat = bprintf("%f",cluster->lat);
 102   const char *groups = NULL;
 103
 104   int start, end, i;
 105   unsigned int iter;
 106
 107   xbt_dynar_t radical_elements;
 108   xbt_dynar_t radical_ends;
 109   xbt_dynar_t tab_elements_num = xbt_dynar_new(sizeof(int), NULL);
 110
 111   char *router_id,*host_id;
 112
 113   radical_elements = xbt_str_split(cluster_radical, ",");
 114   xbt_dynar_foreach(radical_elements, iter, groups) {
 115     radical_ends = xbt_str_split(groups, "-");
 116
 117     switch (xbt_dynar_length(radical_ends)) {
 118     case 1:
 119       start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
 120       xbt_dynar_push_as(tab_elements_num, int, start);
 121       router_id = bprintf("ns3_%s%d%s", cluster_prefix, start, cluster_suffix);
 122       xbt_lib_set(host_lib,
 123                   router_id,
 124                   NS3_HOST_LEVEL,
 125                   ns3_add_host_cluster(router_id)
 126         );
 127       XBT_DEBUG("NS3_ADD_ROUTER '%s'",router_id);
 128       free(router_id);
 129       break;
 130
 131     case 2:
 132       start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
 133       end = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 1, char *));
 134       for (i = start; i <= end; i++){
 135         xbt_dynar_push_as(tab_elements_num, int, i);
 136         router_id = bprintf("ns3_%s%d%s", cluster_prefix, i, cluster_suffix);
 137         xbt_lib_set(host_lib,
 138                     router_id,
 139                     NS3_HOST_LEVEL,
 140                     ns3_add_host_cluster(router_id)
 141           );
 142         XBT_DEBUG("NS3_ADD_ROUTER '%s'",router_id);
 143         free(router_id);
 144       }
 145       break;
 146
 147     default:
 148       XBT_DEBUG("Malformed radical");
 149     }
 150   }
 151
 152   //Create links
 153   unsigned int cpt;
 154   int elmts;
 155   char * lat = xbt_strdup(cluster_lat);
 156   char * bw =  xbt_strdup(cluster_bw);
 157   replace_lat_ns3(&lat);
 158   replace_bdw_ns3(&bw);
 159
 160   xbt_dynar_foreach(tab_elements_num,cpt,elmts)
 161   {
 162     host_id   = bprintf("%s%d%s", cluster_prefix, elmts, cluster_suffix);
 163     router_id = bprintf("ns3_%s%d%s", cluster_prefix, elmts, cluster_suffix);
 164     XBT_DEBUG("Create link from '%s' to '%s'",host_id,router_id);
 165
 166     ns3_nodes_t host_src = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,host_id,  NS3_HOST_LEVEL));
 167     ns3_nodes_t host_dst = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,router_id,NS3_HOST_LEVEL));
 168
 169     if(host_src && host_dst){}
 170     else xbt_die("\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
 171
 172     ns3_add_link(host_src->node_num,host_src->type,
 173                  host_dst->node_num,host_dst->type,
 174                  bw,lat);
 175
 176     free(router_id);
 177     free(host_id);
 178   }
 179   xbt_dynar_free(&tab_elements_num);
 180
 181
 182   //Create link backbone
 183   lat = xbt_strdup(cluster_bb_lat);
 184   bw =  xbt_strdup(cluster_bb_bw);
 185   replace_lat_ns3(&lat);
 186   replace_bdw_ns3(&bw);
 187   ns3_add_cluster(bw,lat,cluster->id);
 188   xbt_free(lat);
 189   xbt_free(bw);
 190 }
 191
 192 /* Create the ns3 topology based on routing strategy */
 193 static void create_ns3_topology(void)
 194 {
 195   XBT_DEBUG("Starting topology generation");
 196
 197   xbt_dynar_shrink(IPV4addr,0);
 198
 199   //get the onelinks from the parsed platform
 200   xbt_dynar_t onelink_routes = routing_platf->getOneLinkRoutes();
 201   if (!onelink_routes)
 202     xbt_die("There is no routes!");
 203   XBT_DEBUG("Have get_onelink_routes, found %ld routes",onelink_routes->used);
 204   //save them in trace file
 205   OnelinkPtr onelink;
 206   unsigned int iter;
 207   xbt_dynar_foreach(onelink_routes, iter, onelink) {
 208     char *src = onelink->p_src->getName();
 209     char *dst = onelink->p_dst->getName();
 210     NetworkNS3LinkPtr link = static_cast<NetworkNS3LinkPtr>(onelink->p_link);
 211
 212     if (strcmp(src,dst) && link->m_created){
 213       XBT_DEBUG("Route from '%s' to '%s' with link '%s'", src, dst, link->getName());
 214       char * link_bdw = xbt_strdup(link->p_bdw);
 215       char * link_lat = xbt_strdup(link->p_lat);
 216       replace_lat_ns3(&link_lat);
 217       replace_bdw_ns3(&link_bdw);
 218       link->m_created = 0;
 219
 220       //   XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
 221       XBT_DEBUG("\tLink (%s) bdw:%s lat:%s", link->getName(), link_bdw, link_lat);
 222
 223       //create link ns3
 224       ns3_nodes_t host_src = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,src,NS3_HOST_LEVEL));
 225       if(!host_src) host_src = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(as_router_lib,src,NS3_ASR_LEVEL));
 226       ns3_nodes_t host_dst = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,dst,NS3_HOST_LEVEL));
 227       if(!host_dst) host_dst = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(as_router_lib,dst,NS3_ASR_LEVEL));
 228
 229       if(host_src && host_dst){}
 230       else xbt_die("\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
 231
 232       ns3_add_link(host_src->node_num,host_src->type,host_dst->node_num,host_dst->type,link_bdw,link_lat);
 233
 234       xbt_free(link_bdw);
 235       xbt_free(link_lat);
 236     }
 237   }
 238 }
 239
 240 static void parse_ns3_end_platform(void)
 241 {
 242   ns3_end_platform();
 243 }
 244
 245 static void define_callbacks_ns3(void)
 246 {
 247   sg_platf_host_add_cb (&parse_ns3_add_host);
 248   sg_platf_router_add_cb (&parse_ns3_add_router);
 249   sg_platf_link_add_cb (&parse_ns3_add_link);
 250   sg_platf_cluster_add_cb (&parse_ns3_add_cluster);
 251   sg_platf_AS_begin_add_cb (&parse_ns3_add_AS);
 252   sg_platf_postparse_add_cb(&create_ns3_topology); //get_one_link_routes
 253   sg_platf_postparse_add_cb(&parse_ns3_end_platform); //InitializeRoutes
 254 }
 255
 256 /*********
 257  * Model *
 258  *********/
 259 static void free_ns3_link(void * elmts)
 260 {
 261   delete static_cast<NetworkNS3LinkPtr>(elmts);
 262 }
 263
 264 static void free_ns3_host(void * elmts)
 265 {
 266   ns3_nodes_t host = static_cast<ns3_nodes_t>(elmts);
 267   free(host);
 268 }
 269
 270 void surf_network_model_init_NS3()
 271 {
 272   if (surf_network_model)
 273     return;
 274
 275   surf_network_model = new NetworkNS3Model();
 276
 277   xbt_dynar_push(model_list, &surf_network_model);
 278 }
 279
 280 NetworkNS3Model::NetworkNS3Model() : NetworkModel("network NS3") {
 281   if (ns3_initialize(xbt_cfg_get_string(_sg_cfg_set, "ns3/TcpModel"))) {
 282     xbt_die("Impossible to initialize NS3 interface");
 283   }
 284   routing_model_create(NULL);
 285   define_callbacks_ns3();
 286
 287   NS3_HOST_LEVEL = xbt_lib_add_level(host_lib,(void_f_pvoid_t)free_ns3_host);
 288   NS3_ASR_LEVEL  = xbt_lib_add_level(as_router_lib,(void_f_pvoid_t)free_ns3_host);
 289 }
 290
 291 NetworkNS3Model::~NetworkNS3Model() {
 292   ns3_finalize();
 293   xbt_dynar_free_container(&IPV4addr);
 294   xbt_dict_free(&dict_socket);
 295 }
 296
 297 NetworkLinkPtr NetworkNS3Model::createNetworkLink(const char *name,
 298                                          double bw_initial,
 299                                          tmgr_trace_t bw_trace,
 300                                          double lat_initial,
 301                                          tmgr_trace_t lat_trace,
 302                                          e_surf_resource_state_t state_initial,
 303                                          tmgr_trace_t state_trace,
 304                                          e_surf_link_sharing_policy_t policy,
 305                                          xbt_dict_t properties){
 306   if (bw_trace)
 307     XBT_INFO("The NS3 network model doesn't support bandwidth state traces");
 308   if (lat_trace)
 309     XBT_INFO("The NS3 network model doesn't support latency state traces");
 310   if (state_trace)
 311     XBT_INFO("The NS3 network model doesn't support link state traces");
 312   return new NetworkNS3Link(this, name, properties, bw_initial, lat_initial);
 313 }
 314
 315 xbt_dynar_t NetworkNS3Model::getRoute(RoutingEdgePtr src, RoutingEdgePtr dst)
 316 {
 317   xbt_dynar_t route = NULL;
 318   routing_get_route_and_latency(src, dst, &route, NULL);
 319   //routing_platf->getRouteAndLatency(src, dst, &route, NULL);
 320   return route;
 321 }
 322
 323 ActionPtr NetworkNS3Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 324                                                double size, double rate)
 325 {
 326   XBT_DEBUG("Communicate from %s to %s", src->getName(), dst->getName());
 327   NetworkNS3ActionPtr action = new NetworkNS3Action(this, size, 0);
 328
 329   ns3_create_flow(src->getName(), dst->getName(), surf_get_clock(), size, action);
 330
 331   action->m_lastSent = 0;
 332   action->p_srcElm = src;
 333   action->p_dstElm = dst;
 334   surf_callback_emit(networkCommunicateCallbacks, action, src, dst, size, rate);
 335
 336   return (surf_action_t) action;
 337 }
 338
 339 double NetworkNS3Model::shareResources(double now)
 340 {
 341   XBT_DEBUG("ns3_share_resources");
 342
 343   //get the first relevant value from the running_actions list
 344   if (!getRunningActionSet()->size() || now == 0.0)
 345     return -1.0;
 346   else
 347     do {
 348       ns3_simulator(now);
 349       time_to_next_flow_completion = ns3_time() - surf_get_clock();//FIXME: use now instead ?
 350     } while(double_equals(time_to_next_flow_completion, 0, sg_surf_precision));
 351
 352   XBT_DEBUG("min       : %f", now);
 353   XBT_DEBUG("ns3  time : %f", ns3_time());
 354   XBT_DEBUG("surf time : %f", surf_get_clock());
 355   XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
 356
 357   return time_to_next_flow_completion;
 358 }
 359
 360 void NetworkNS3Model::updateActionsState(double now, double delta)
 361 {
 362   xbt_dict_cursor_t cursor = NULL;
 363   char *key;
 364   void *data;
 365
 366   static xbt_dynar_t socket_to_destroy = NULL;
 367   if(!socket_to_destroy) socket_to_destroy = xbt_dynar_new(sizeof(char*),NULL);
 368
 369   /* If there are no running flows, just return */
 370   if (!getRunningActionSet()->size()) {
 371     while(double_positive(now-ns3_time(), sg_surf_precision)) {
 372       ns3_simulator(now-ns3_time());
 373     }
 374     return;
 375   }
 376
 377   NetworkNS3ActionPtr action;
 378   xbt_dict_foreach(dict_socket,cursor,key,data){
 379     action = static_cast<NetworkNS3ActionPtr>(ns3_get_socket_action(data));
 380     XBT_DEBUG("Processing socket %p (action %p)",data,action);
 381     action->setRemains(action->getCost() - ns3_get_socket_sent(data));
 382
 383     if (TRACE_is_enabled() &&
 384                 action->getState() == SURF_ACTION_RUNNING){
 385         double data_sent = ns3_get_socket_sent(data);
 386         double data_delta_sent = data_sent - action->m_lastSent;
 387
 388         xbt_dynar_t route = NULL;
 389
 390         routing_get_route_and_latency (action->p_srcElm, action->p_dstElm, &route, NULL);
 391         unsigned int i;
 392         for (i = 0; i < xbt_dynar_length (route); i++){
 393                 NetworkNS3LinkPtr link = ((NetworkNS3LinkPtr)xbt_dynar_get_ptr (route, i));
 394                 TRACE_surf_link_set_utilization (link->getName(),
 395                                 action->getCategory(),
 396                                         (data_delta_sent)/delta,
 397                                         now-delta,
 398                                         delta);
 399         }
 400         action->m_lastSent = data_sent;
 401     }
 402
 403     if(ns3_get_socket_is_finished(data) == 1){
 404       xbt_dynar_push(socket_to_destroy,&key);
 405       XBT_DEBUG("Destroy socket %p of action %p", key, action);
 406       action->finish();
 407       action->setState(SURF_ACTION_DONE);
 408     }
 409   }
 410
 411   while (!xbt_dynar_is_empty(socket_to_destroy)){
 412     xbt_dynar_pop(socket_to_destroy,&key);
 413
 414     void *data = xbt_dict_get (dict_socket, key);
 415     action = static_cast<NetworkNS3ActionPtr>(ns3_get_socket_action(data));
 416     XBT_DEBUG ("Removing socket %p of action %p", key, action);
 417     xbt_dict_remove(dict_socket, key);
 418   }
 419   return;
 420 }
 421
 422 /************
 423  * Resource *
 424  ************/
 425
 426 NetworkNS3Link::NetworkNS3Link(NetworkNS3ModelPtr model, const char *name, xbt_dict_t props,
 427                                        double bw_initial, double lat_initial)
 428  : NetworkLink(model, name, props)
 429  , p_lat(bprintf("%f", lat_initial))
 430  , p_bdw(bprintf("%f", bw_initial))
 431  , m_created(1)
 432 {
 433 }
 434
 435 NetworkNS3Link::~NetworkNS3Link()
 436 {
 437 }
 438
 439 void NetworkNS3Link::updateState(tmgr_trace_event_t event_type, double value, double date)
 440 {
 441
 442 }
 443
 444 /**********
 445  * Action *
 446  **********/
 447
 448 NetworkNS3Action::NetworkNS3Action(ModelPtr model, double cost, bool failed)
 449 : NetworkAction(model, cost, failed)
 450 {}
 451
 452 #ifdef HAVE_LATENCY_BOUND_TRACKING
 453   int NetworkNS3Action::getLatencyLimited() {
 454     return m_latencyLimited;
 455   }
 456 #endif
 457
 458  void NetworkNS3Action::suspend()
 459 {
 460   THROW_UNIMPLEMENTED;
 461 }
 462
 463 void NetworkNS3Action::resume()
 464 {
 465   THROW_UNIMPLEMENTED;
 466 }
 467
 468   /* Test whether a flow is suspended */
 469 bool NetworkNS3Action::isSuspended()
 470 {
 471   return 0;
 472 }
 473
 474 int NetworkNS3Action::unref()
 475 {
 476   m_refcount--;
 477   if (!m_refcount) {
 478         if (actionHook::is_linked())
 479           p_stateSet->erase(p_stateSet->iterator_to(*this));
 480     XBT_DEBUG ("Removing action %p", this);
 481         delete this;
 482     return 1;
 483   }
 484   return 0;
 485 }