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