src/surf/network_gtnets.c

   1 /* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "network_gtnets_private.h"
   8 #include "gtnets/gtnets_interface.h"
   9 #include "xbt/str.h"
  10
  11 static double time_to_next_flow_completion = -1;
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_gtnets, surf,
  14                                 "Logging specific to the SURF network GTNetS module");
  15
  16 extern routing_global_t global_routing;
  17
  18 double sg_gtnets_jitter = 0.0;
  19 int sg_gtnets_jitter_seed = 10;
  20
  21 static void link_new(char *name, double bw, double lat, xbt_dict_t props)
  22 {
  23   static int link_count = -1;
  24   network_link_GTNETS_t gtnets_link;
  25   network_link_GTNETS_t gtnets_link_friend;
  26   int tmp_idsrc = -1;
  27   int tmp_iddst = -1;
  28   char *name_friend;
  29
  30   if (xbt_dict_get_or_null(surf_network_model->resource_set, name)) {
  31     return;
  32   }
  33
  34   DEBUG1("Scanning link name %s", name);
  35   sscanf(name, "%d_%d", &tmp_idsrc, &tmp_iddst);
  36   DEBUG2("Link name split into %d and %d", tmp_idsrc, tmp_iddst);
  37
  38   xbt_assert0((tmp_idsrc != -1)
  39               && (tmp_idsrc != -1),
  40               "You need to respect fullduplex convention x_y for xml link id.");
  41
  42   name_friend = (char *) calloc(strlen(name), sizeof(char));
  43   sprintf(name_friend, "%d_%d", tmp_iddst, tmp_idsrc);
  44
  45   gtnets_link = xbt_new0(s_network_link_GTNETS_t, 1);
  46   gtnets_link->generic_resource.name = name;
  47   gtnets_link->generic_resource.properties = props;
  48   gtnets_link->bw_current = bw;
  49   gtnets_link->lat_current = lat;
  50
  51   if ((gtnets_link_friend =
  52        xbt_dict_get_or_null(surf_network_model->resource_set,
  53                             name_friend))) {
  54     gtnets_link->id = gtnets_link_friend->id;
  55   } else {
  56     link_count++;
  57
  58     DEBUG4("Adding new link, linkid %d, name %s, latency %g, bandwidth %g",
  59            link_count, name, lat, bw);
  60     if (gtnets_add_link(link_count, bw, lat)) {
  61       xbt_assert0(0, "Cannot create GTNetS link");
  62     }
  63     gtnets_link->id = link_count;
  64   }
  65   xbt_dict_set(surf_network_model->resource_set, name, gtnets_link,
  66                surf_resource_free);
  67 #ifdef HAVE_TRACING
  68   TRACE_surf_link_declaration(gtnets_link, name, bw, lat);
  69 #endif
  70 }
  71
  72 static void route_new(int src_id, int dst_id, xbt_dynar_t links,
  73                       int nb_link)
  74 {
  75   network_link_GTNETS_t link;
  76   unsigned int cursor;
  77   int i = 0;
  78   int *gtnets_links;
  79
  80   XBT_IN4("(src_id=%d, dst_id=%d, links=%p, nb_link=%d)",
  81           src_id, dst_id, links, nb_link);
  82
  83   /* Build the list of gtnets link IDs */
  84   gtnets_links = (int *) calloc(nb_link, sizeof(int));
  85   i = 0;
  86   xbt_dynar_foreach(links, cursor, link) {
  87     gtnets_links[i++] = link->id;
  88   }
  89
  90   if (gtnets_add_route(src_id, dst_id, gtnets_links, nb_link)) {
  91     xbt_assert0(0, "Cannot create GTNetS route");
  92   }
  93   XBT_OUT;
  94 }
  95
  96 static void route_onehop_new(int src_id, int dst_id,
  97                              network_link_GTNETS_t link)
  98 {
  99   if (gtnets_add_onehop_route(src_id, dst_id, link->id)) {
 100     xbt_assert0(0, "Cannot create GTNetS route");
 101   }
 102 }
 103
 104 /* Parse the XML for a network link */
 105 static void parse_link_init(void)
 106 {
 107   char *name;
 108   double bw;
 109   double lat;
 110   e_surf_resource_state_t state;
 111
 112   name = xbt_strdup(A_surfxml_link_id);
 113   surf_parse_get_double(&bw, A_surfxml_link_bandwidth);
 114   surf_parse_get_double(&lat, A_surfxml_link_latency);
 115   state = SURF_RESOURCE_ON;
 116
 117   tmgr_trace_t bw_trace;
 118   tmgr_trace_t state_trace;
 119   tmgr_trace_t lat_trace;
 120
 121   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
 122   lat_trace = tmgr_trace_new(A_surfxml_link_latency_file);
 123   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 124
 125   if (bw_trace)
 126     INFO0
 127         ("The GTNetS network model doesn't support bandwidth state traces");
 128   if (lat_trace)
 129     INFO0("The GTNetS network model doesn't support latency state traces");
 130   if (state_trace)
 131     INFO0("The GTNetS network model doesn't support link state traces");
 132
 133   current_property_set = xbt_dict_new();
 134   link_new(name, bw, lat, current_property_set);
 135 }
 136
 137 /* Create the gtnets topology based on routing strategy */
 138 static void create_gtnets_topology()
 139 {
 140 //  xbt_dict_cursor_t cursor = NULL;
 141 //  char *key, *data;
 142 //   xbt_dict_t onelink_routes = global_routing->get_onelink_routes();
 143 //   xbt_assert0(onelink_routes, "Error onelink_routes was not initialized");
 144 //
 145 //   DEBUG0("Starting topology generation");
 146 // À refaire plus tard. Il faut prendre la liste des hôtes/routeurs (dans routing)
 147 // À partir de cette liste, on les numérote.
 148 // Ensuite, on peut utiliser les id pour refaire les appels GTNets qui suivent.
 149
 150 //   xbt_dict_foreach(onelink_routes, cursor, key, data){
 151 //      s_onelink_t link = (s_onelink_t) data;
 152 //
 153 //      DEBUG3("Link (#%d), src (#%s), dst (#%s)", ((network_link_GTNETS_t)(link->link_ptr))->id , link->src, link->dst);
 154 //     DEBUG0("Calling one link route");
 155 //     if(global_routing->is_router(link->src)){
 156 //      gtnets_add_router(link->src_id);
 157 //     }
 158 //     if(global_routing->is_router(link->dst)){
 159 //      gtnets_add_router(link->dst_id);
 160 //     }
 161 //     route_onehop_new(link->src_id, link->dst_id, (network_link_GTNETS_t)(link->link_ptr));
 162 //   }
 163 //
 164 //   xbt_dict_free(&route_table);
 165 //   if (XBT_LOG_ISENABLED(surf_network_gtnets, xbt_log_priority_debug)) {
 166 //        gtnets_print_topology();
 167 //   }
 168 }
 169
 170 /* Main XML parsing */
 171 static void define_callbacks(const char *file)
 172 {
 173   /* Figuring out the network links */
 174   surfxml_add_callback(STag_surfxml_link_cb_list, &parse_link_init);
 175   surfxml_add_callback(ETag_surfxml_platform_cb_list,
 176                        &create_gtnets_topology);
 177 }
 178
 179 static int resource_used(void *resource_id)
 180 {
 181   xbt_assert0(0,
 182               "The resource_used feature is not implemented in GTNets model");
 183 }
 184
 185 static int action_unref(surf_action_t action)
 186 {
 187   action->refcount--;
 188   if (!action->refcount) {
 189     xbt_swag_remove(action, action->state_set);
 190 #ifdef HAVE_TRACING
 191     if (action->category)
 192       xbt_free(action->category);
 193 #endif
 194     free(action);
 195     return 1;
 196   }
 197   return 0;
 198 }
 199
 200 static void action_cancel(surf_action_t action)
 201 {
 202   xbt_assert0(0, "Cannot cancel GTNetS flow");
 203   return;
 204 }
 205
 206 static void action_recycle(surf_action_t action)
 207 {
 208   xbt_assert0(0, "Cannot recycle GTNetS flow");
 209   return;
 210 }
 211
 212 static double action_get_remains(surf_action_t action)
 213 {
 214   return action->remains;
 215 }
 216
 217 static void action_state_set(surf_action_t action,
 218                              e_surf_action_state_t state)
 219 {
 220   surf_action_state_set(action, state);
 221 }
 222
 223 static double share_resources(double now)
 224 {
 225   xbt_swag_t running_actions =
 226       surf_network_model->states.running_action_set;
 227
 228   //get the first relevant value from the running_actions list
 229   if (!xbt_swag_size(running_actions))
 230     return -1.0;
 231
 232   xbt_assert0(time_to_next_flow_completion,
 233               "Time to next flow completion not initialized!\n");
 234
 235   DEBUG0("Calling gtnets_get_time_to_next_flow_completion");
 236   time_to_next_flow_completion = gtnets_get_time_to_next_flow_completion();
 237   DEBUG1("gtnets_get_time_to_next_flow_completion received %lg",
 238          time_to_next_flow_completion);
 239
 240   return time_to_next_flow_completion;
 241 }
 242
 243 static void update_actions_state(double now, double delta)
 244 {
 245   surf_action_network_GTNETS_t action = NULL;
 246   xbt_swag_t running_actions =
 247       surf_network_model->states.running_action_set;
 248
 249   /* If there are no renning flows, just return */
 250   if (time_to_next_flow_completion < 0.0) {
 251     return;
 252   }
 253
 254   /* if delta == time_to_next_flow_completion, too. */
 255   if (time_to_next_flow_completion <= delta) {  /* run until the first flow completes */
 256     void **metadata;
 257     int i, num_flows;
 258
 259     num_flows = 0;
 260
 261     if (gtnets_run_until_next_flow_completion(&metadata, &num_flows)) {
 262       xbt_assert0(0,
 263                   "Cannot run GTNetS simulation until next flow completion");
 264     }
 265     if (num_flows < 1) {
 266       xbt_assert0(0,
 267                   "GTNetS simulation couldn't find a flow that would complete");
 268     }
 269
 270     xbt_swag_foreach(action, running_actions) {
 271       DEBUG2("Action (%p) remains old value: %f", action,
 272              action->generic_action.remains);
 273       double sent = gtnets_get_flow_rx(action);
 274
 275 #ifdef HAVE_TRACING
 276       double trace_sent = sent;
 277       if (trace_sent == 0) {
 278         //if sent is equals to 0, means that gtnets sent all the bytes
 279         trace_sent = action->generic_action.cost;
 280       }
 281       // tracing resource utilization
 282 // COMMENTED BY DAVID
 283 //       int src = TRACE_surf_gtnets_get_src (action);
 284 //       int dst = TRACE_surf_gtnets_get_dst (action);
 285 //       if (src != -1 && dst != -1){
 286 //         xbt_dynar_t route = used_routing->get_route(src, dst);
 287 //         network_link_GTNETS_t link;
 288 //         unsigned int i;
 289 //         xbt_dynar_foreach(route, i, link) {
 290 //              TRACE_surf_link_set_utilization (link->generic_resource.name,
 291 //             action->generic_action.data, trace_sent/delta, now-delta, delta);
 292 //         }
 293 //       }
 294 #endif
 295
 296       DEBUG1("Sent value returned by GTNetS : %f", sent);
 297       //need to trust this remain value
 298       if (sent == 0) {
 299         action->generic_action.remains = 0;
 300       } else {
 301         action->generic_action.remains =
 302             action->generic_action.cost - sent;
 303       }
 304       DEBUG2("Action (%p) remains new value: %f", action,
 305              action->generic_action.remains);
 306     }
 307
 308     for (i = 0; i < num_flows; i++) {
 309       action = (surf_action_network_GTNETS_t) (metadata[i]);
 310
 311       action->generic_action.finish = now + time_to_next_flow_completion;
 312 #ifdef HAVE_TRACING
 313       TRACE_surf_gtnets_destroy(action);
 314 #endif
 315       action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 316       DEBUG1("----> Action (%p) just terminated", action);
 317     }
 318
 319
 320   } else {                      /* run for a given number of seconds */
 321     if (gtnets_run(delta)) {
 322       xbt_assert0(0, "Cannot run GTNetS simulation");
 323     }
 324   }
 325
 326   return;
 327 }
 328
 329 static void update_resource_state(void *id,
 330                                   tmgr_trace_event_t event_type,
 331                                   double value, double date)
 332 {
 333   xbt_assert0(0, "Cannot update model state for GTNetS simulation");
 334 }
 335
 336 /* Max durations are not supported */
 337 static surf_action_t communicate(const char *src_name,
 338                                  const char *dst_name, double size,
 339                                  double rate)
 340 {
 341   int src, dst;
 342
 343   // Utiliser le dictionnaire définit dans create_gtnets_topology pour initialiser correctement src et dst
 344   src = dst = -1;
 345   surf_action_network_GTNETS_t action = NULL;
 346
 347   xbt_assert0((src >= 0
 348                && dst >= 0), "Either src or dst have invalid id (id<0)");
 349
 350   DEBUG4("Setting flow src %d \"%s\", dst %d \"%s\"", src, src_name, dst,
 351          dst_name);
 352
 353   xbt_dynar_t links = global_routing->get_route(src_name, dst_name);
 354   route_new(src, dst, links, xbt_dynar_length(links));
 355
 356   action =
 357       surf_action_new(sizeof(s_surf_action_network_GTNETS_t), size,
 358                       surf_network_model, 0);
 359
 360   /* Add a flow to the GTNets Simulation, associated to this action */
 361   if (gtnets_create_flow(src, dst, size, (void *) action) < 0) {
 362     xbt_assert2(0, "Not route between host %s and host %s", src_name,
 363                 dst_name);
 364   }
 365 #ifdef HAVE_TRACING
 366   TRACE_surf_gtnets_communicate(action, src, dst);
 367 #endif
 368
 369   return (surf_action_t) action;
 370 }
 371
 372 /* Suspend a flow() */
 373 static void action_suspend(surf_action_t action)
 374 {
 375   THROW_UNIMPLEMENTED;
 376 }
 377
 378 /* Resume a flow() */
 379 static void action_resume(surf_action_t action)
 380 {
 381   THROW_UNIMPLEMENTED;
 382 }
 383
 384 /* Test whether a flow is suspended */
 385 static int action_is_suspended(surf_action_t action)
 386 {
 387   return 0;
 388 }
 389
 390 static void finalize(void)
 391 {
 392   gtnets_finalize();
 393 }
 394
 395 static void surf_network_model_init_internal(void)
 396 {
 397   surf_network_model = surf_model_init();
 398
 399   surf_network_model->name = "network GTNetS";
 400   surf_network_model->action_unref = action_unref;
 401   surf_network_model->action_cancel = action_cancel;
 402   surf_network_model->action_recycle = action_recycle;
 403   surf_network_model->action_state_set = action_state_set;
 404   surf_network_model->get_remains = action_get_remains;
 405
 406   surf_network_model->model_private->resource_used = resource_used;
 407   surf_network_model->model_private->share_resources = share_resources;
 408   surf_network_model->model_private->update_actions_state =
 409       update_actions_state;
 410   surf_network_model->model_private->update_resource_state =
 411       update_resource_state;
 412   surf_network_model->model_private->finalize = finalize;
 413
 414   surf_network_model->suspend = action_suspend;
 415   surf_network_model->resume = action_resume;
 416   surf_network_model->is_suspended = action_is_suspended;
 417
 418   surf_network_model->extension.network.communicate = communicate;
 419
 420   /* Added the initialization for GTNetS interface */
 421   if (gtnets_initialize(sg_tcp_gamma)) {
 422     xbt_assert0(0, "Impossible to initialize GTNetS interface");
 423   }
 424
 425   routing_model_create(sizeof(network_link_GTNETS_t), NULL);
 426 }
 427
 428 #ifdef HAVE_LATENCY_BOUND_TRACKING
 429 static int get_latency_limited(surf_action_t action)
 430 {
 431   return 0;
 432 }
 433 #endif
 434
 435 #ifdef HAVE_GTNETS
 436 void surf_network_model_init_GTNETS(const char *filename)
 437 {
 438   if (surf_network_model)
 439     return;
 440   surf_network_model_init_internal();
 441   define_callbacks(filename);
 442   xbt_dynar_push(model_list, &surf_network_model);
 443
 444 #ifdef HAVE_LATENCY_BOUND_TRACKING
 445   surf_network_model->get_latency_limited = get_latency_limited;
 446 #endif
 447
 448   if (sg_gtnets_jitter > 0.0) {
 449     gtnets_set_jitter(sg_gtnets_jitter);
 450     gtnets_set_jitter_seed(sg_gtnets_jitter_seed);
 451   }
 452
 453   update_model_description(surf_network_model_description,
 454                            "GTNets", surf_network_model);
 455 }
 456 #endif