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