src/surf/network_constant.c

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "surf_private.h"
   9 #include "network_common.h"
  10 #include "surf/random_mgr.h"
  11 #include "xbt/dict.h"
  12 #include "xbt/str.h"
  13 #include "xbt/log.h"
  14
  15 typedef struct network_card_Constant {
  16   char *name;
  17   int id;
  18 } s_network_card_Constant_t, *network_card_Constant_t;
  19
  20 typedef struct surf_action_network_Constant {
  21   s_surf_action_t generic_action;
  22   double latency;
  23   double lat_init;
  24   int suspended;
  25   network_card_Constant_t src;
  26   network_card_Constant_t dst;
  27 } s_surf_action_network_Constant_t, *surf_action_network_Constant_t;
  28
  29 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  30 static random_data_t random_latency = NULL;
  31 static int card_number = 0;
  32 static int host_number = 0;
  33
  34 static void network_card_free(void *nw_card)
  35 {
  36   free(((network_card_Constant_t) nw_card)->name);
  37   free(nw_card);
  38 }
  39
  40 static int network_card_new(const char *card_name)
  41 {
  42   network_card_Constant_t card =
  43     xbt_dict_get_or_null(network_card_set, card_name);
  44
  45   if (!card) {
  46     card = xbt_new0(s_network_card_Constant_t, 1);
  47     card->name = xbt_strdup(card_name);
  48     card->id = card_number++;
  49     xbt_dict_set(network_card_set, card_name, card, network_card_free);
  50   }
  51   return card->id;
  52 }
  53
  54 static int src_id = -1;
  55 static int dst_id = -1;
  56
  57 static void parse_route_set_endpoints(void)
  58 {
  59   src_id = network_card_new(A_surfxml_route_src);
  60   dst_id = network_card_new(A_surfxml_route_dst);
  61   route_action = A_surfxml_route_action;
  62 }
  63
  64 static void parse_route_set_route(void)
  65 {
  66   char *name;
  67   if (src_id != -1 && dst_id != -1) {
  68     name = bprintf("%x#%x", src_id, dst_id);
  69     manage_route(route_table, name, route_action, 0);
  70     free(name);
  71   }
  72 }
  73
  74 static void count_hosts(void)
  75 {
  76   host_number++;
  77 }
  78
  79 static void define_callbacks(const char *file)
  80 {
  81   /* Figuring out the network links */
  82   surfxml_add_callback(STag_surfxml_host_cb_list, &count_hosts);
  83   surfxml_add_callback(STag_surfxml_route_cb_list,
  84                        &parse_route_set_endpoints);
  85   surfxml_add_callback(ETag_surfxml_route_cb_list, &parse_route_set_route);
  86 }
  87
  88 static void *name_service(const char *name)
  89 {
  90   network_card_Constant_t card = xbt_dict_get_or_null(network_card_set, name);
  91   return card;
  92 }
  93
  94 static const char *get_resource_name(void *resource_id)
  95 {
  96   return ((network_card_Constant_t) resource_id)->name;
  97 }
  98
  99 static int resource_used(void *resource_id)
 100 {
 101   return 0;
 102 }
 103
 104 static int action_free(surf_action_t action)
 105 {
 106   action->refcount--;
 107   if (!action->refcount) {
 108     xbt_swag_remove(action, action->state_set);
 109     free(action);
 110     return 1;
 111   }
 112   return 0;
 113 }
 114
 115 static void action_use(surf_action_t action)
 116 {
 117   action->refcount++;
 118 }
 119
 120 static void action_cancel(surf_action_t action)
 121 {
 122   return;
 123 }
 124
 125 static void action_recycle(surf_action_t action)
 126 {
 127   return;
 128 }
 129
 130 static void action_change_state(surf_action_t action,
 131                                 e_surf_action_state_t state)
 132 {
 133   surf_action_change_state(action, state);
 134   return;
 135 }
 136
 137 static double share_resources(double now)
 138 {
 139   surf_action_network_Constant_t action = NULL;
 140   xbt_swag_t running_actions =
 141     surf_network_model->common_public.states.running_action_set;
 142   double min = -1.0;
 143
 144   xbt_swag_foreach(action, running_actions) {
 145     if (action->latency > 0) {
 146       if (min < 0)
 147         min = action->latency;
 148       else if (action->latency < min)
 149         min = action->latency;
 150     }
 151   }
 152
 153   return min;
 154 }
 155
 156 static void update_actions_state(double now, double delta)
 157 {
 158   surf_action_network_Constant_t action = NULL;
 159   surf_action_network_Constant_t next_action = NULL;
 160   xbt_swag_t running_actions =
 161     surf_network_model->common_public.states.running_action_set;
 162
 163   xbt_swag_foreach_safe(action, next_action, running_actions) {
 164     if (action->latency > 0) {
 165       if (action->latency > delta) {
 166         double_update(&(action->latency), delta);
 167       } else {
 168         action->latency = 0.0;
 169       }
 170     }
 171     double_update(&(action->generic_action.remains),
 172                   action->generic_action.cost * delta / action->lat_init);
 173     if (action->generic_action.max_duration != NO_MAX_DURATION)
 174       double_update(&(action->generic_action.max_duration), delta);
 175
 176     if (action->generic_action.remains <= 0) {
 177       action->generic_action.finish = surf_get_clock();
 178       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 179     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 180                (action->generic_action.max_duration <= 0)) {
 181       action->generic_action.finish = surf_get_clock();
 182       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 183     }
 184   }
 185
 186   return;
 187 }
 188
 189 static void update_resource_state(void *id,
 190                                   tmgr_trace_event_t event_type,
 191                                   double value, double time)
 192 {
 193   DIE_IMPOSSIBLE;
 194 }
 195
 196 static surf_action_t communicate(void *src, void *dst, double size,
 197                                  double rate)
 198 {
 199   surf_action_network_Constant_t action = NULL;
 200   network_card_Constant_t card_src = src;
 201   network_card_Constant_t card_dst = dst;
 202
 203   XBT_IN4("(%s,%s,%g,%g)", card_src->name, card_dst->name, size, rate);
 204
 205   action = xbt_new0(s_surf_action_network_Constant_t, 1);
 206
 207   action->generic_action.refcount = 1;
 208   action->generic_action.cost = size;
 209   action->generic_action.remains = size;
 210   action->generic_action.max_duration = NO_MAX_DURATION;
 211   action->generic_action.start = surf_get_clock();
 212   action->generic_action.finish = -1.0;
 213   action->generic_action.model_type = (surf_model_t) surf_network_model;
 214   action->suspended = 0;
 215
 216   action->latency = random_generate(random_latency);
 217   action->lat_init = action->latency;
 218
 219   if (action->latency <= 0.0)
 220     action->generic_action.state_set =
 221       surf_network_model->common_public.states.done_action_set;
 222   else
 223     action->generic_action.state_set =
 224       surf_network_model->common_public.states.running_action_set;
 225
 226   xbt_swag_insert(action, action->generic_action.state_set);
 227
 228
 229   XBT_OUT;
 230
 231   return (surf_action_t) action;
 232 }
 233
 234 /* returns an array of link_Constant_t */
 235 static const void **get_route(void *src, void *dst)
 236 {
 237   xbt_assert0(0, "Calling this function does not make any sense");
 238   return (const void **) NULL;
 239 }
 240
 241 static int get_route_size(void *src, void *dst)
 242 {
 243   xbt_assert0(0, "Calling this function does not make any sense");
 244   return 0;
 245 }
 246
 247 static const char *get_link_name(const void *link)
 248 {
 249   DIE_IMPOSSIBLE;
 250 }
 251
 252 static double get_link_bandwidth(const void *link)
 253 {
 254   DIE_IMPOSSIBLE;
 255 }
 256
 257 static double get_link_latency(const void *link)
 258 {
 259   DIE_IMPOSSIBLE;
 260 }
 261
 262 static int link_shared(const void *link)
 263 {
 264   DIE_IMPOSSIBLE;
 265 }
 266
 267 static xbt_dict_t get_properties(void *link)
 268 {
 269   DIE_IMPOSSIBLE;
 270 }
 271
 272 static void action_suspend(surf_action_t action)
 273 {
 274   ((surf_action_network_Constant_t) action)->suspended = 1;
 275 }
 276
 277 static void action_resume(surf_action_t action)
 278 {
 279   if (((surf_action_network_Constant_t) action)->suspended)
 280     ((surf_action_network_Constant_t) action)->suspended = 0;
 281 }
 282
 283 static int action_is_suspended(surf_action_t action)
 284 {
 285   return ((surf_action_network_Constant_t) action)->suspended;
 286 }
 287
 288 static void action_set_max_duration(surf_action_t action, double duration)
 289 {
 290   action->max_duration = duration;
 291 }
 292
 293 static void finalize(void)
 294 {
 295   xbt_dict_free(&network_card_set);
 296
 297   surf_model_exit((surf_model_t)surf_network_model);
 298
 299   free(surf_network_model->extension_public);
 300
 301   free(surf_network_model);
 302   surf_network_model = NULL;
 303
 304   card_number = 0;
 305 }
 306
 307 static void surf_network_model_init_internal(void)
 308 {
 309   surf_network_model = xbt_new0(s_surf_network_model_t, 1);
 310
 311   surf_model_init((surf_model_t)surf_network_model);
 312
 313   surf_network_model->extension_public =
 314     xbt_new0(s_surf_network_model_extension_public_t, 1);
 315
 316   surf_network_model->common_public.name_service = name_service;
 317   surf_network_model->common_public.get_resource_name = get_resource_name;
 318   surf_network_model->common_public.action_get_state = surf_action_get_state;
 319   surf_network_model->common_public.action_get_start_time =
 320     surf_action_get_start_time;
 321   surf_network_model->common_public.action_get_finish_time =
 322     surf_action_get_finish_time;
 323   surf_network_model->common_public.action_free = action_free;
 324   surf_network_model->common_public.action_use = action_use;
 325   surf_network_model->common_public.action_cancel = action_cancel;
 326   surf_network_model->common_public.action_recycle = action_recycle;
 327   surf_network_model->common_public.action_change_state =
 328     action_change_state;
 329   surf_network_model->common_public.action_set_data = surf_action_set_data;
 330   surf_network_model->common_public.name = "network";
 331
 332   surf_network_model->common_private->resource_used = resource_used;
 333   surf_network_model->common_private->share_resources = share_resources;
 334   surf_network_model->common_private->update_actions_state =
 335     update_actions_state;
 336   surf_network_model->common_private->update_resource_state =
 337     update_resource_state;
 338   surf_network_model->common_private->finalize = finalize;
 339
 340   surf_network_model->common_public.suspend = action_suspend;
 341   surf_network_model->common_public.resume = action_resume;
 342   surf_network_model->common_public.is_suspended = action_is_suspended;
 343   surf_cpu_model->common_public.set_max_duration = action_set_max_duration;
 344
 345   surf_network_model->extension_public->communicate = communicate;
 346   surf_network_model->extension_public->get_route = get_route;
 347   surf_network_model->extension_public->get_route_size = get_route_size;
 348   surf_network_model->extension_public->get_link_name = get_link_name;
 349   surf_network_model->extension_public->get_link_bandwidth =
 350     get_link_bandwidth;
 351   surf_network_model->extension_public->get_link_latency = get_link_latency;
 352   surf_network_model->extension_public->link_shared = link_shared;
 353
 354   surf_network_model->common_public.get_properties = get_properties;
 355
 356   network_card_set = xbt_dict_new();
 357
 358   if (!random_latency)
 359     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 360 }
 361
 362 void surf_network_model_init_Constant(const char *filename)
 363 {
 364
 365   if (surf_network_model)
 366     return;
 367   surf_network_model_init_internal();
 368   define_callbacks(filename);
 369   xbt_dynar_push(model_list, &surf_network_model);
 370
 371   update_model_description(surf_network_model_description,
 372                            "Constant", (surf_model_t) surf_network_model);
 373 }