src/surf/sg_platf.cpp

   1 /* Copyright (c) 2006-2014. 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 "xbt/misc.h"
   8 #include "xbt/log.h"
   9 #include "xbt/str.h"
  10 #include "xbt/dict.h"
  11 #include "xbt/RngStream.h"
  12 #include <xbt/signal.hpp>
  13 #include "simgrid/platf_interface.h"
  14 #include "surf/surf.h"
  15
  16 #include "src/simix/smx_private.h"
  17 #include "src/surf/platform.hpp"
  18
  19 #include "surf/surfxml_parse.h"// FIXME: brain dead public header
  20
  21 #include "src/surf/platform.hpp"
  22 #include "src/surf/cpu_interface.hpp"
  23 #include "src/surf/host_interface.hpp"
  24 #include "src/surf/network_interface.hpp"
  25 #include "surf/surf_routing.h" // FIXME: brain dead public header
  26 #include "src/surf/surf_routing_cluster.hpp"
  27 #include "src/surf/surf_routing_cluster_torus.hpp"
  28 #include "src/surf/surf_routing_cluster_fat_tree.hpp"
  29
  30 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
  31
  32 XBT_PRIVATE xbt_dynar_t mount_list = NULL;
  33
  34 namespace simgrid {
  35 namespace surf {
  36
  37 simgrid::xbt::signal<void(sg_platf_link_cbarg_t)> on_link;
  38 simgrid::xbt::signal<void(sg_platf_cluster_cbarg_t)> on_cluster;
  39 simgrid::xbt::signal<void(void)> on_postparse;
  40
  41 }
  42 }
  43
  44 static int surf_parse_models_setup_already_called = 0;
  45
  46 /* one RngStream for the platform, to respect some statistic rules */
  47 static RngStream sg_platf_rng_stream = NULL;
  48
  49 /** Module management function: creates all internal data structures */
  50 void sg_platf_init(void) {
  51 }
  52
  53 /** Module management function: frees all internal data structures */
  54 void sg_platf_exit(void) {
  55   simgrid::surf::on_link.disconnect_all_slots();
  56   simgrid::surf::on_cluster.disconnect_all_slots();
  57   simgrid::surf::on_postparse.disconnect_all_slots();
  58
  59   /* make sure that we will reinit the models while loading the platf once reinited */
  60   surf_parse_models_setup_already_called = 0;
  61 }
  62
  63 /** @brief Add an "host" to the current AS */
  64 void sg_platf_new_host(sg_platf_host_cbarg_t host)
  65 {
  66   xbt_assert(! sg_host_by_name(host->id),
  67       "Refusing to create a second host named '%s'.", host->id);
  68
  69   simgrid::surf::As* current_routing = routing_get_current();
  70   if (current_routing->hierarchy_ == SURF_ROUTING_NULL)
  71     current_routing->hierarchy_ = SURF_ROUTING_BASE;
  72
  73   simgrid::surf::NetCard *netcard =
  74       new simgrid::surf::NetCardImpl(host->id, SURF_NETWORK_ELEMENT_HOST, current_routing);
  75
  76   netcard->setId(current_routing->parsePU(netcard));
  77   sg_host_t h = simgrid::s4u::Host::by_name_or_create(host->id);
  78   h->pimpl_netcard = netcard;
  79   simgrid::surf::netcardCreatedCallbacks(netcard);
  80
  81   if(mount_list){
  82     xbt_lib_set(storage_lib, host->id, ROUTING_STORAGE_HOST_LEVEL, (void *) mount_list);
  83     mount_list = NULL;
  84   }
  85
  86   if (host->coord && strcmp(host->coord, "")) {
  87     unsigned int cursor;
  88     char*str;
  89
  90     if (!COORD_HOST_LEVEL)
  91       xbt_die ("To use host coordinates, please add --cfg=network/coordinates:yes to your command line");
  92     /* Pre-parse the host coordinates -- FIXME factorize with routers by overloading the routing->parse_PU function*/
  93     xbt_dynar_t ctn_str = xbt_str_split_str(host->coord, " ");
  94     xbt_dynar_t ctn = xbt_dynar_new(sizeof(double),NULL);
  95     xbt_dynar_foreach(ctn_str,cursor, str) {
  96       double val = xbt_str_parse_double(str, "Invalid coordinate: %s");
  97       xbt_dynar_push(ctn,&val);
  98     }
  99     xbt_dynar_shrink(ctn, 0);
 100     xbt_dynar_free(&ctn_str);
 101     h->extension_set(COORD_HOST_LEVEL, (void *) ctn);
 102     XBT_DEBUG("Having set host coordinates for '%s'",host->id);
 103   }
 104
 105
 106   simgrid::surf::Cpu *cpu = surf_cpu_model_pm->createCpu( h,
 107       host->speed_peak,
 108       host->pstate,
 109       host->speed_scale, host->speed_trace,
 110       host->core_amount,
 111       host->initiallyOn, host->state_trace);
 112   surf_host_model->createHost(host->id, netcard, cpu, host->properties)->attach(h);
 113   simgrid::s4u::Host::onCreation(*h);
 114
 115   if (TRACE_is_enabled() && TRACE_needs_platform())
 116     sg_instr_new_host(host);
 117 }
 118
 119 /**
 120  * \brief Add a "router" to the network element list
 121  */
 122 void sg_platf_new_router(sg_platf_router_cbarg_t router)
 123 {
 124   simgrid::surf::As* current_routing = routing_get_current();
 125
 126   if (current_routing->hierarchy_ == SURF_ROUTING_NULL)
 127     current_routing->hierarchy_ = SURF_ROUTING_BASE;
 128   xbt_assert(!xbt_lib_get_or_null(as_router_lib, router->id, ROUTING_ASR_LEVEL),
 129              "Reading a router, processing unit \"%s\" already exists",
 130              router->id);
 131
 132   simgrid::surf::NetCard *info = new simgrid::surf::NetCardImpl(router->id, SURF_NETWORK_ELEMENT_ROUTER, current_routing);
 133   info->setId(current_routing->parsePU(info));
 134   xbt_lib_set(as_router_lib, router->id, ROUTING_ASR_LEVEL, (void *) info);
 135   XBT_DEBUG("Having set name '%s' id '%d'", router->id, info->getId());
 136   simgrid::surf::netcardCreatedCallbacks(info);
 137
 138   if (router->coord && strcmp(router->coord, "")) {
 139     unsigned int cursor;
 140     char*str;
 141
 142     if (!COORD_ASR_LEVEL)
 143       xbt_die ("To use host coordinates, please add --cfg=network/coordinates:yes to your command line");
 144     /* Pre-parse the host coordinates */
 145     xbt_dynar_t ctn_str = xbt_str_split_str(router->coord, " ");
 146     xbt_dynar_t ctn = xbt_dynar_new(sizeof(double),NULL);
 147     xbt_dynar_foreach(ctn_str,cursor, str) {
 148       double val = xbt_str_parse_double(str, "Invalid coordinate: %s");
 149       xbt_dynar_push(ctn,&val);
 150     }
 151     xbt_dynar_shrink(ctn, 0);
 152     xbt_dynar_free(&ctn_str);
 153     xbt_lib_set(as_router_lib, router->id, COORD_ASR_LEVEL, (void *) ctn);
 154     XBT_DEBUG("Having set router coordinates for '%s'",router->id);
 155   }
 156
 157   if (TRACE_is_enabled() && TRACE_needs_platform())
 158     sg_instr_new_router(router);
 159 }
 160
 161 void sg_platf_new_link(sg_platf_link_cbarg_t link){
 162   simgrid::surf::on_link(link);
 163 }
 164
 165 void sg_platf_new_cluster(sg_platf_cluster_cbarg_t cluster)
 166 {
 167   using simgrid::surf::AsCluster;
 168   using simgrid::surf::AsClusterTorus;
 169   using simgrid::surf::AsClusterFatTree;
 170
 171   char *host_id, *groups, *link_id = NULL;
 172   xbt_dict_t patterns = NULL;
 173   int rankId=0;
 174
 175   s_sg_platf_host_cbarg_t host = SG_PLATF_HOST_INITIALIZER;
 176   s_sg_platf_link_cbarg_t link = SG_PLATF_LINK_INITIALIZER;
 177
 178   unsigned int iter;
 179
 180   if ((cluster->availability_trace && strcmp(cluster->availability_trace, ""))
 181       || (cluster->state_trace && strcmp(cluster->state_trace, ""))) {
 182     patterns = xbt_dict_new_homogeneous(xbt_free_f);
 183     xbt_dict_set(patterns, "id", xbt_strdup(cluster->id), NULL);
 184     xbt_dict_set(patterns, "prefix", xbt_strdup(cluster->prefix), NULL);
 185     xbt_dict_set(patterns, "suffix", xbt_strdup(cluster->suffix), NULL);
 186   }
 187
 188   /* Parse the topology attributes.
 189    * Nothing to do in a vanilla cluster, but that's another story for torus and flat_trees */
 190   s_sg_platf_AS_cbarg_t AS = SG_PLATF_AS_INITIALIZER;
 191   AS.id = cluster->id;
 192
 193   switch (cluster->topology) {
 194   case SURF_CLUSTER_TORUS:
 195     AS.routing = A_surfxml_AS_routing_ClusterTorus;
 196     break;
 197   case SURF_CLUSTER_FAT_TREE:
 198     AS.routing = A_surfxml_AS_routing_ClusterFatTree;
 199     break;
 200   default:
 201     AS.routing = A_surfxml_AS_routing_Cluster;
 202     break;
 203   }
 204
 205   // What an inventive way of initializing the AS that I have as ancestor :-(
 206   sg_platf_new_AS_begin(&AS);
 207   simgrid::surf::As *current_routing = routing_get_current();
 208   static_cast<AsCluster*>(current_routing)->parse_specific_arguments(cluster);
 209
 210   if(cluster->loopback_bw!=0 || cluster->loopback_lat!=0){
 211       ((AsCluster*)current_routing)->p_nb_links_per_node++;
 212       ((AsCluster*)current_routing)->p_has_loopback=1;
 213   }
 214
 215   if(cluster->limiter_link!=0){
 216       ((AsCluster*)current_routing)->p_nb_links_per_node++;
 217       ((AsCluster*)current_routing)->p_has_limiter=1;
 218   }
 219
 220
 221   //Make all hosts
 222   xbt_dynar_t radical_elements = xbt_str_split(cluster->radical, ",");
 223   xbt_dynar_foreach(radical_elements, iter, groups) {
 224
 225     xbt_dynar_t radical_ends = xbt_str_split(groups, "-");
 226     int start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
 227     int end;
 228
 229     switch (xbt_dynar_length(radical_ends)) {
 230     case 1:
 231       end = start;
 232       break;
 233     case 2:
 234       end = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 1, char *));
 235       break;
 236     default:
 237       surf_parse_error("Malformed radical");
 238       break;
 239     }
 240     for (int i = start; i <= end; i++) {
 241       host_id = bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
 242       link_id = bprintf("%s_link_%d", cluster->id, i);
 243
 244       XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id, cluster->speed);
 245
 246       memset(&host, 0, sizeof(host));
 247       host.id = host_id;
 248       if ((cluster->properties != NULL) && (!xbt_dict_is_empty(cluster->properties))) {
 249         xbt_dict_cursor_t cursor=NULL;
 250         char *key,*data;
 251         host.properties = xbt_dict_new();
 252
 253         xbt_dict_foreach(cluster->properties,cursor,key,data) {
 254           xbt_dict_set(host.properties, key, xbt_strdup(data),free);
 255         }
 256       }
 257       if (cluster->availability_trace && strcmp(cluster->availability_trace, "")) {
 258         xbt_dict_set(patterns, "radical", bprintf("%d", i), NULL);
 259         char *avail_file = xbt_str_varsubst(cluster->availability_trace, patterns);
 260         XBT_DEBUG("\tavailability_file=\"%s\"", avail_file);
 261         host.speed_trace = tmgr_trace_new_from_file(avail_file);
 262         xbt_free(avail_file);
 263       } else {
 264         XBT_DEBUG("\tavailability_file=\"\"");
 265       }
 266
 267       if (cluster->state_trace && strcmp(cluster->state_trace, "")) {
 268         char *avail_file = xbt_str_varsubst(cluster->state_trace, patterns);
 269         XBT_DEBUG("\tstate_file=\"%s\"", avail_file);
 270         host.state_trace = tmgr_trace_new_from_file(avail_file);
 271         xbt_free(avail_file);
 272       } else {
 273         XBT_DEBUG("\tstate_file=\"\"");
 274       }
 275
 276       host.speed_peak = xbt_dynar_new(sizeof(double), NULL);
 277       xbt_dynar_push(host.speed_peak,&cluster->speed);
 278       host.pstate = 0;
 279
 280       //host.power_peak = cluster->power;
 281       host.speed_scale = 1.0;
 282       host.core_amount = cluster->core_amount;
 283       host.initiallyOn = 1;
 284       host.coord = "";
 285       sg_platf_new_host(&host);
 286       xbt_dynar_free(&host.speed_peak);
 287       XBT_DEBUG("</host>");
 288
 289       XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id,
 290                 cluster->bw, cluster->lat);
 291
 292
 293       s_surf_parsing_link_up_down_t info_lim, info_loop;
 294       // All links are saved in a matrix;
 295       // every row describes a single node; every node
 296       // may have multiple links.
 297       // the first column may store a link from x to x if p_has_loopback is set
 298       // the second column may store a limiter link if p_has_limiter is set
 299       // other columns are to store one or more link for the node
 300
 301       //add a loopback link
 302       if(cluster->loopback_bw!=0 || cluster->loopback_lat!=0){
 303         char *tmp_link = bprintf("%s_loopback", link_id);
 304         XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link,
 305                 cluster->limiter_link);
 306
 307
 308         memset(&link, 0, sizeof(link));
 309         link.id        = tmp_link;
 310         link.bandwidth = cluster->loopback_bw;
 311         link.latency   = cluster->loopback_lat;
 312         link.initiallyOn = 1;
 313         link.policy    = SURF_LINK_FATPIPE;
 314         sg_platf_new_link(&link);
 315         info_loop.link_up   = Link::byName(tmp_link);
 316         info_loop.link_down = info_loop.link_up;
 317         free(tmp_link);
 318         xbt_dynar_set(current_routing->upDownLinks,
 319           rankId*(static_cast<AsCluster*>(current_routing))->p_nb_links_per_node, &info_loop);
 320       }
 321
 322       //add a limiter link (shared link to account for maximal bandwidth of the node)
 323       if(cluster->limiter_link!=0){
 324         char *tmp_link = bprintf("%s_limiter", link_id);
 325         XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link,
 326                 cluster->limiter_link);
 327
 328
 329         memset(&link, 0, sizeof(link));
 330         link.id = tmp_link;
 331         link.bandwidth = cluster->limiter_link;
 332         link.latency = 0;
 333         link.initiallyOn = 1;
 334         link.policy = SURF_LINK_SHARED;
 335         sg_platf_new_link(&link);
 336         info_lim.link_up = Link::byName(tmp_link);
 337         info_lim.link_down = info_lim.link_up;
 338         free(tmp_link);
 339         auto as_cluster = static_cast<AsCluster*>(current_routing);
 340         xbt_dynar_set(current_routing->upDownLinks,
 341             rankId*(as_cluster)->p_nb_links_per_node + as_cluster->p_has_loopback ,
 342             &info_lim);
 343
 344       }
 345
 346
 347       //call the cluster function that adds the others links
 348       if (cluster->topology == SURF_CLUSTER_FAT_TREE) {
 349         ((AsClusterFatTree*) current_routing)->addProcessingNode(i);
 350       }
 351       else {
 352       static_cast<AsCluster*>(current_routing)->create_links_for_node(cluster, i, rankId, rankId*
 353           static_cast<AsCluster*>(current_routing)->p_nb_links_per_node
 354           + static_cast<AsCluster*>(current_routing)->p_has_loopback
 355           + static_cast<AsCluster*>(current_routing)->p_has_limiter );
 356       }
 357       xbt_free(link_id);
 358       xbt_free(host_id);
 359       rankId++;
 360     }
 361
 362     xbt_dynar_free(&radical_ends);
 363   }
 364   xbt_dynar_free(&radical_elements);
 365
 366   // For fat trees, the links must be created once all nodes have been added
 367   if(cluster->topology == SURF_CLUSTER_FAT_TREE) {
 368     static_cast<simgrid::surf::AsClusterFatTree*>(current_routing)->create_links();
 369   }
 370   // Add a router. It is magically used thanks to the way in which surf_routing_cluster is written,
 371   // and it's very useful to connect clusters together
 372   XBT_DEBUG(" ");
 373   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id);
 374   char *newid = NULL;
 375   s_sg_platf_router_cbarg_t router = SG_PLATF_ROUTER_INITIALIZER;
 376   memset(&router, 0, sizeof(router));
 377   router.id = cluster->router_id;
 378   router.coord = "";
 379   if (!router.id || !strcmp(router.id, ""))
 380     router.id = newid =
 381         bprintf("%s%s_router%s", cluster->prefix, cluster->id,
 382                 cluster->suffix);
 383   sg_platf_new_router(&router);
 384   ((AsCluster*)current_routing)->p_router = (simgrid::surf::NetCard*) xbt_lib_get_or_null(as_router_lib, router.id, ROUTING_ASR_LEVEL);
 385   free(newid);
 386
 387   //Make the backbone
 388   if ((cluster->bb_bw != 0) || (cluster->bb_lat != 0)) {
 389     char *link_backbone = bprintf("%s_backbone", cluster->id);
 390     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link_backbone,
 391               cluster->bb_bw, cluster->bb_lat);
 392
 393     memset(&link, 0, sizeof(link));
 394     link.id        = link_backbone;
 395     link.bandwidth = cluster->bb_bw;
 396     link.latency   = cluster->bb_lat;
 397     link.initiallyOn = 1;
 398     link.policy    = cluster->bb_sharing_policy;
 399
 400     sg_platf_new_link(&link);
 401
 402     routing_cluster_add_backbone(Link::byName(link_backbone));
 403
 404     free(link_backbone);
 405   }
 406
 407   XBT_DEBUG("</AS>");
 408   sg_platf_new_AS_end();
 409   XBT_DEBUG(" ");
 410   xbt_dict_free(&patterns); // no op if it were never set
 411
 412   simgrid::surf::on_cluster(cluster);
 413 }
 414
 415 void sg_platf_new_storage(sg_platf_storage_cbarg_t storage)
 416 {
 417   xbt_assert(!xbt_lib_get_or_null(storage_lib, storage->id,ROUTING_STORAGE_LEVEL),
 418                "Refusing to add a second storage named \"%s\"", storage->id);
 419
 420   void* stype = xbt_lib_get_or_null(storage_type_lib, storage->type_id,ROUTING_STORAGE_TYPE_LEVEL);
 421   xbt_assert(stype,"No storage type '%s'", storage->type_id);
 422
 423   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'",
 424       storage->id,
 425       storage->type_id,
 426       storage->content);
 427
 428   xbt_lib_set(storage_lib,
 429       storage->id,
 430       ROUTING_STORAGE_LEVEL,
 431       (void *) xbt_strdup(storage->type_id));
 432
 433   // if storage content is not specified use the content of storage_type if any
 434   if(!strcmp(storage->content,"") && strcmp(((storage_type_t) stype)->content,"")){
 435     storage->content = ((storage_type_t) stype)->content;
 436     storage->content_type = ((storage_type_t) stype)->content_type;
 437     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s) from storage type '%s' ",
 438         storage->id,((storage_type_t) stype)->content_type,
 439         ((storage_type_t) stype)->type_id);
 440   }
 441
 442   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
 443       "\n\t\tmodel '%s' \n\t\tcontent '%s'\n\t\tcontent_type '%s' "
 444       "\n\t\tproperties '%p''\n",
 445       storage->id,
 446       ((storage_type_t) stype)->model,
 447       ((storage_type_t) stype)->type_id,
 448       storage->content,
 449       storage->content_type,
 450     storage->properties);
 451
 452   surf_storage_model->createStorage(storage->id,
 453                                      ((storage_type_t) stype)->type_id,
 454                                      storage->content,
 455                                      storage->content_type,
 456                    storage->properties,
 457                                      storage->attach);
 458 }
 459 void sg_platf_new_storage_type(sg_platf_storage_type_cbarg_t storage_type){
 460
 461   xbt_assert(!xbt_lib_get_or_null(storage_type_lib, storage_type->id,ROUTING_STORAGE_TYPE_LEVEL),
 462                "Reading a storage type, processing unit \"%s\" already exists", storage_type->id);
 463
 464   storage_type_t stype = xbt_new0(s_storage_type_t, 1);
 465   stype->model = xbt_strdup(storage_type->model);
 466   stype->properties = storage_type->properties;
 467   stype->content = xbt_strdup(storage_type->content);
 468   stype->content_type = xbt_strdup(storage_type->content_type);
 469   stype->type_id = xbt_strdup(storage_type->id);
 470   stype->size = storage_type->size;
 471   stype->model_properties = storage_type->model_properties;
 472
 473   XBT_DEBUG("ROUTING Create a storage type id '%s' with model '%s', "
 474       "content '%s', and content_type '%s'",
 475       stype->type_id,
 476       stype->model,
 477       storage_type->content,
 478       storage_type->content_type);
 479
 480   xbt_lib_set(storage_type_lib,
 481       stype->type_id,
 482       ROUTING_STORAGE_TYPE_LEVEL,
 483       (void *) stype);
 484 }
 485 void sg_platf_new_mstorage(sg_platf_mstorage_cbarg_t mstorage)
 486 {
 487   THROW_UNIMPLEMENTED;
 488 }
 489
 490 static void mount_free(void *p)
 491 {
 492   mount_t mnt = (mount_t) p;
 493   xbt_free(mnt->name);
 494 }
 495
 496 void sg_platf_new_mount(sg_platf_mount_cbarg_t mount){
 497   // Verification of an existing storage
 498   xbt_assert(xbt_lib_get_or_null(storage_lib, mount->storageId, ROUTING_STORAGE_LEVEL),
 499       "Cannot mount non-existent disk \"%s\"", mount->storageId);
 500
 501   XBT_DEBUG("ROUTING Mount '%s' on '%s'",mount->storageId, mount->name);
 502
 503   s_mount_t mnt;
 504   mnt.storage = surf_storage_resource_priv(surf_storage_resource_by_name(mount->storageId));
 505   mnt.name = xbt_strdup(mount->name);
 506
 507   if(!mount_list){
 508     XBT_DEBUG("Create a Mount list for %s",A_surfxml_host_id);
 509     mount_list = xbt_dynar_new(sizeof(s_mount_t), mount_free);
 510   }
 511   xbt_dynar_push(mount_list, &mnt);
 512 }
 513
 514 void sg_platf_new_route(sg_platf_route_cbarg_t route)
 515 {
 516   routing_get_current()->parseRoute(route);
 517 }
 518
 519 void sg_platf_new_ASroute(sg_platf_route_cbarg_t ASroute)
 520 {
 521   routing_get_current()->parseASroute(ASroute);
 522 }
 523
 524 void sg_platf_new_bypassRoute(sg_platf_route_cbarg_t bypassRoute)
 525 {
 526   routing_get_current()->parseBypassroute(bypassRoute);
 527 }
 528
 529 void sg_platf_new_bypassASroute(sg_platf_route_cbarg_t bypassASroute)
 530 {
 531   routing_get_current()->parseBypassroute(bypassASroute);
 532 }
 533
 534 void sg_platf_new_process(sg_platf_process_cbarg_t process)
 535 {
 536   if (!simix_global)
 537     xbt_die("Cannot create process without SIMIX.");
 538
 539   sg_host_t host = sg_host_by_name(process->host);
 540   if (!host) {
 541     // The requested host does not exist. Do a nice message to the user
 542     char *tmp = bprintf("Cannot create process '%s': host '%s' does not exist\nExisting hosts: '",process->function, process->host);
 543     xbt_strbuff_t msg = xbt_strbuff_new_from(tmp);
 544     free(tmp);
 545     xbt_dynar_t all_hosts = xbt_dynar_sort_strings(sg_hosts_as_dynar());
 546     simgrid::s4u::Host* host;
 547     unsigned int cursor;
 548     xbt_dynar_foreach(all_hosts,cursor, host) {
 549       xbt_strbuff_append(msg,host->name().c_str());
 550       xbt_strbuff_append(msg,"', '");
 551       if (msg->used > 1024) {
 552         msg->data[msg->used-3]='\0';
 553         msg->used -= 3;
 554
 555         xbt_strbuff_append(msg," ...(list truncated)......");// That will be shortened by 3 chars when existing the loop
 556       }
 557     }
 558     msg->data[msg->used-3]='\0';
 559     xbt_die("%s", msg->data);
 560   }
 561   xbt_main_func_t parse_code = SIMIX_get_registered_function(process->function);
 562   xbt_assert(parse_code, "Function '%s' unknown", process->function);
 563
 564   double start_time = process->start_time;
 565   double kill_time  = process->kill_time;
 566   int auto_restart = process->on_failure == SURF_PROCESS_ON_FAILURE_DIE ? 0 : 1;
 567
 568   smx_process_arg_t arg = NULL;
 569   smx_process_t process_created = NULL;
 570
 571   arg = xbt_new0(s_smx_process_arg_t, 1);
 572   arg->code = parse_code;
 573   arg->data = NULL;
 574   arg->hostname = sg_host_get_name(host);
 575   arg->argc = process->argc;
 576   arg->argv = xbt_new(char *,process->argc);
 577   int i;
 578   for (i=0; i<process->argc; i++)
 579     arg->argv[i] = xbt_strdup(process->argv[i]);
 580   arg->name = xbt_strdup(arg->argv[0]);
 581   arg->kill_time = kill_time;
 582   arg->properties = current_property_set;
 583   if (!sg_host_simix(host)->boot_processes) {
 584     sg_host_simix(host)->boot_processes = xbt_dynar_new(sizeof(smx_process_arg_t), _SIMIX_host_free_process_arg);
 585   }
 586   xbt_dynar_push_as(sg_host_simix(host)->boot_processes,smx_process_arg_t,arg);
 587
 588   if (start_time > SIMIX_get_clock()) {
 589     arg = xbt_new0(s_smx_process_arg_t, 1);
 590     arg->name = (char*)(process->argv)[0];
 591     arg->code = parse_code;
 592     arg->data = NULL;
 593     arg->hostname = sg_host_get_name(host);
 594     arg->argc = process->argc;
 595     arg->argv = (char**)(process->argv);
 596     arg->kill_time = kill_time;
 597     arg->properties = current_property_set;
 598
 599     XBT_DEBUG("Process %s(%s) will be started at time %f", arg->name,
 600            arg->hostname, start_time);
 601     SIMIX_timer_set(start_time, [](void* arg) {
 602       SIMIX_process_create_from_wrapper((smx_process_arg_t) arg);
 603     }, arg);
 604   } else {                      // start_time <= SIMIX_get_clock()
 605     XBT_DEBUG("Starting Process %s(%s) right now", arg->name, sg_host_get_name(host));
 606
 607     if (simix_global->create_process_function)
 608       process_created = simix_global->create_process_function(
 609           arg->name,
 610                                             parse_code,
 611                                             NULL,
 612                                             sg_host_get_name(host),
 613                                             kill_time,
 614                                             process->argc,
 615                                             (char**)(process->argv),
 616                                             current_property_set,
 617                                             auto_restart, NULL);
 618     else
 619       process_created = simcall_process_create(arg->name, parse_code, NULL, sg_host_get_name(host), kill_time, process->argc,
 620           (char**)process->argv, current_property_set,auto_restart);
 621
 622     /* verify if process has been created (won't be the case if the host is currently dead, but that's fine) */
 623     if (!process_created) {
 624       return;
 625     }
 626   }
 627   current_property_set = NULL;
 628 }
 629
 630 void sg_platf_route_begin (sg_platf_route_cbarg_t route){
 631   route->link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
 632 }
 633 void sg_platf_ASroute_begin (sg_platf_route_cbarg_t ASroute){
 634   ASroute->link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
 635 }
 636
 637 void sg_platf_route_end (sg_platf_route_cbarg_t route){
 638   sg_platf_new_route(route);
 639 }
 640 void sg_platf_ASroute_end (sg_platf_route_cbarg_t ASroute){
 641   sg_platf_new_ASroute(ASroute);
 642 }
 643
 644 void sg_platf_route_add_link (const char* link_id, sg_platf_route_cbarg_t route){
 645   char *link_name = xbt_strdup(link_id);
 646   xbt_dynar_push(route->link_list, &link_name);
 647 }
 648 void sg_platf_ASroute_add_link (const char* link_id, sg_platf_route_cbarg_t ASroute){
 649   char *link_name = xbt_strdup(link_id);
 650   xbt_dynar_push(ASroute->link_list, &link_name);
 651 }
 652
 653 void sg_platf_begin() { /* Do nothing: just for symmetry of user code */ }
 654
 655 void sg_platf_end() {
 656   simgrid::surf::on_postparse();
 657 }
 658
 659 void sg_platf_new_AS_begin(sg_platf_AS_cbarg_t AS)
 660 {
 661   if (!surf_parse_models_setup_already_called) {
 662     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
 663      * That is, after the last <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
 664      *
 665      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
 666      * (FIXME: check it out by creating a file beginning with one of these tags)
 667      * but cluster and peer create ASes internally, so putting the code in there is ok.
 668      *
 669      * TODO, There used to be a guard protecting here against
 670      * xbt_dynar_length(sg_platf_AS_begin_cb_list) because we don't want to
 671      * initialize the models if we are parsing the file to get the deployment.
 672      * That could happen if the same file would be used for platf and deploy:
 673      * it'd contain AS tags even during the deploy parsing. Removing that guard
 674      * would result of the models to get re-inited when parsing for deploy.
 675      * Currently using the same file for platform and deployment is broken
 676      * however. This guard will have to ba adapted in order to make this feature
 677      * work again.
 678      */
 679     surf_parse_models_setup_already_called = 1;
 680     surf_config_models_setup();
 681   }
 682
 683   routing_AS_begin(AS);
 684   if (TRACE_is_enabled())
 685     sg_instr_AS_begin(AS);
 686 }
 687
 688 void sg_platf_new_AS_end()
 689 {
 690   routing_AS_end();
 691   if (TRACE_is_enabled())
 692     sg_instr_AS_end();
 693 }
 694 /* ***************************************** */
 695
 696 void sg_platf_rng_stream_init(unsigned long seed[6]) {
 697   RngStream_SetPackageSeed(seed);
 698   sg_platf_rng_stream = RngStream_CreateStream(NULL);
 699 }
 700
 701 RngStream sg_platf_rng_stream_get(const char* id) {
 702   RngStream stream = NULL;
 703   unsigned int id_hash;
 704
 705   stream = RngStream_CopyStream(sg_platf_rng_stream);
 706   id_hash = xbt_str_hash(id);
 707   RngStream_AdvanceState(stream, 0, (long)id_hash);
 708
 709   return stream;
 710 }