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           surf_model_resource_by_name(surf_network_model,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(surf_model_resource_set(surf_network_model), 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 const char *get_resource_name(void *resource_id)
  89 {
  90   return ((network_card_Constant_t) resource_id)->name;
  91 }
  92
  93 static int resource_used(void *resource_id)
  94 {
  95   return 0;
  96 }
  97
  98 static int action_free(surf_action_t action)
  99 {
 100   action->refcount--;
 101   if (!action->refcount) {
 102     xbt_swag_remove(action, action->state_set);
 103     free(action);
 104     return 1;
 105   }
 106   return 0;
 107 }
 108
 109 static void action_use(surf_action_t action)
 110 {
 111   action->refcount++;
 112 }
 113
 114 static void action_cancel(surf_action_t action)
 115 {
 116   return;
 117 }
 118
 119 static void action_recycle(surf_action_t action)
 120 {
 121   return;
 122 }
 123
 124 static void action_change_state(surf_action_t action,
 125                                 e_surf_action_state_t state)
 126 {
 127   surf_action_change_state(action, state);
 128   return;
 129 }
 130
 131 static double share_resources(double now)
 132 {
 133   surf_action_network_Constant_t action = NULL;
 134   xbt_swag_t running_actions =
 135     surf_network_model->common_public.states.running_action_set;
 136   double min = -1.0;
 137
 138   xbt_swag_foreach(action, running_actions) {
 139     if (action->latency > 0) {
 140       if (min < 0)
 141         min = action->latency;
 142       else if (action->latency < min)
 143         min = action->latency;
 144     }
 145   }
 146
 147   return min;
 148 }
 149
 150 static void update_actions_state(double now, double delta)
 151 {
 152   surf_action_network_Constant_t action = NULL;
 153   surf_action_network_Constant_t next_action = NULL;
 154   xbt_swag_t running_actions =
 155     surf_network_model->common_public.states.running_action_set;
 156
 157   xbt_swag_foreach_safe(action, next_action, running_actions) {
 158     if (action->latency > 0) {
 159       if (action->latency > delta) {
 160         double_update(&(action->latency), delta);
 161       } else {
 162         action->latency = 0.0;
 163       }
 164     }
 165     double_update(&(action->generic_action.remains),
 166                   action->generic_action.cost * delta / action->lat_init);
 167     if (action->generic_action.max_duration != NO_MAX_DURATION)
 168       double_update(&(action->generic_action.max_duration), delta);
 169
 170     if (action->generic_action.remains <= 0) {
 171       action->generic_action.finish = surf_get_clock();
 172       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 173     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 174                (action->generic_action.max_duration <= 0)) {
 175       action->generic_action.finish = surf_get_clock();
 176       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 177     }
 178   }
 179
 180   return;
 181 }
 182
 183 static void update_resource_state(void *id,
 184                                   tmgr_trace_event_t event_type,
 185                                   double value, double time)
 186 {
 187   DIE_IMPOSSIBLE;
 188 }
 189
 190 static surf_action_t communicate(void *src, void *dst, double size,
 191                                  double rate)
 192 {
 193   surf_action_network_Constant_t action = NULL;
 194   network_card_Constant_t card_src = src;
 195   network_card_Constant_t card_dst = dst;
 196
 197   XBT_IN4("(%s,%s,%g,%g)", card_src->name, card_dst->name, size, rate);
 198
 199   action = xbt_new0(s_surf_action_network_Constant_t, 1);
 200
 201   action->generic_action.refcount = 1;
 202   action->generic_action.cost = size;
 203   action->generic_action.remains = size;
 204   action->generic_action.max_duration = NO_MAX_DURATION;
 205   action->generic_action.start = surf_get_clock();
 206   action->generic_action.finish = -1.0;
 207   action->generic_action.model_type = (surf_model_t) surf_network_model;
 208   action->suspended = 0;
 209
 210   action->latency = random_generate(random_latency);
 211   action->lat_init = action->latency;
 212
 213   if (action->latency <= 0.0)
 214     action->generic_action.state_set =
 215       surf_network_model->common_public.states.done_action_set;
 216   else
 217     action->generic_action.state_set =
 218       surf_network_model->common_public.states.running_action_set;
 219
 220   xbt_swag_insert(action, action->generic_action.state_set);
 221
 222
 223   XBT_OUT;
 224
 225   return (surf_action_t) action;
 226 }
 227
 228 /* returns an array of link_Constant_t */
 229 static const void **get_route(void *src, void *dst)
 230 {
 231   xbt_assert0(0, "Calling this function does not make any sense");
 232   return (const void **) NULL;
 233 }
 234
 235 static int get_route_size(void *src, void *dst)
 236 {
 237   xbt_assert0(0, "Calling this function does not make any sense");
 238   return 0;
 239 }
 240
 241 static const char *get_link_name(const void *link)
 242 {
 243   DIE_IMPOSSIBLE;
 244 }
 245
 246 static double get_link_bandwidth(const void *link)
 247 {
 248   DIE_IMPOSSIBLE;
 249 }
 250
 251 static double get_link_latency(const void *link)
 252 {
 253   DIE_IMPOSSIBLE;
 254 }
 255
 256 static int link_shared(const void *link)
 257 {
 258   DIE_IMPOSSIBLE;
 259 }
 260
 261 static xbt_dict_t get_properties(void *link)
 262 {
 263   DIE_IMPOSSIBLE;
 264 }
 265
 266 static void action_suspend(surf_action_t action)
 267 {
 268   ((surf_action_network_Constant_t) action)->suspended = 1;
 269 }
 270
 271 static void action_resume(surf_action_t action)
 272 {
 273   if (((surf_action_network_Constant_t) action)->suspended)
 274     ((surf_action_network_Constant_t) action)->suspended = 0;
 275 }
 276
 277 static int action_is_suspended(surf_action_t action)
 278 {
 279   return ((surf_action_network_Constant_t) action)->suspended;
 280 }
 281
 282 static void action_set_max_duration(surf_action_t action, double duration)
 283 {
 284   action->max_duration = duration;
 285 }
 286
 287 static void finalize(void)
 288 {
 289   surf_model_exit((surf_model_t)surf_network_model);
 290
 291   free(surf_network_model->extension_public);
 292
 293   free(surf_network_model);
 294   surf_network_model = NULL;
 295
 296   card_number = 0;
 297 }
 298
 299 static void surf_network_model_init_internal(void)
 300 {
 301   surf_network_model = xbt_new0(s_surf_network_model_t, 1);
 302
 303   surf_model_init((surf_model_t)surf_network_model);
 304
 305   surf_network_model->extension_public =
 306     xbt_new0(s_surf_network_model_extension_public_t, 1);
 307
 308   surf_network_model->common_public.get_resource_name = get_resource_name;
 309   surf_network_model->common_public.action_get_state = surf_action_get_state;
 310   surf_network_model->common_public.action_get_start_time =
 311     surf_action_get_start_time;
 312   surf_network_model->common_public.action_get_finish_time =
 313     surf_action_get_finish_time;
 314   surf_network_model->common_public.action_free = action_free;
 315   surf_network_model->common_public.action_use = action_use;
 316   surf_network_model->common_public.action_cancel = action_cancel;
 317   surf_network_model->common_public.action_recycle = action_recycle;
 318   surf_network_model->common_public.action_change_state =
 319     action_change_state;
 320   surf_network_model->common_public.action_set_data = surf_action_set_data;
 321   surf_network_model->common_public.name = "network";
 322
 323   surf_network_model->common_private->resource_used = resource_used;
 324   surf_network_model->common_private->share_resources = share_resources;
 325   surf_network_model->common_private->update_actions_state =
 326     update_actions_state;
 327   surf_network_model->common_private->update_resource_state =
 328     update_resource_state;
 329   surf_network_model->common_private->finalize = finalize;
 330
 331   surf_network_model->common_public.suspend = action_suspend;
 332   surf_network_model->common_public.resume = action_resume;
 333   surf_network_model->common_public.is_suspended = action_is_suspended;
 334   surf_cpu_model->common_public.set_max_duration = action_set_max_duration;
 335
 336   surf_network_model->extension_public->communicate = communicate;
 337   surf_network_model->extension_public->get_route = get_route;
 338   surf_network_model->extension_public->get_route_size = get_route_size;
 339   surf_network_model->extension_public->get_link_name = get_link_name;
 340   surf_network_model->extension_public->get_link_bandwidth =
 341     get_link_bandwidth;
 342   surf_network_model->extension_public->get_link_latency = get_link_latency;
 343   surf_network_model->extension_public->link_shared = link_shared;
 344
 345   surf_network_model->common_public.get_properties = get_properties;
 346
 347   if (!random_latency)
 348     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 349 }
 350
 351 void surf_network_model_init_Constant(const char *filename)
 352 {
 353
 354   if (surf_network_model)
 355     return;
 356   surf_network_model_init_internal();
 357   define_callbacks(filename);
 358   xbt_dynar_push(model_list, &surf_network_model);
 359
 360   update_model_description(surf_network_model_description,
 361                            "Constant", (surf_model_t) surf_network_model);
 362 }