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   s_surf_resource_t generic_resource;
  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 int network_card_new(const char *card_name)
  35 {
  36   network_card_Constant_t card =
  37     surf_model_resource_by_name(surf_network_model, card_name);
  38
  39   if (!card) {
  40     card = xbt_new0(s_network_card_Constant_t, 1);
  41     card->generic_resource.name = xbt_strdup(card_name);
  42     card->id = card_number++;
  43     xbt_dict_set(surf_model_resource_set(surf_network_model), card_name, card,
  44                  surf_resource_free);
  45   }
  46   return card->id;
  47 }
  48
  49 static int src_id = -1;
  50 static int dst_id = -1;
  51
  52 static void parse_route_set_endpoints(void)
  53 {
  54   src_id = network_card_new(A_surfxml_route_src);
  55   dst_id = network_card_new(A_surfxml_route_dst);
  56   route_action = A_surfxml_route_action;
  57 }
  58
  59 static void parse_route_set_route(void)
  60 {
  61   char *name;
  62   if (src_id != -1 && dst_id != -1) {
  63     name = bprintf("%x#%x", src_id, dst_id);
  64     manage_route(route_table, name, route_action, 0);
  65     free(name);
  66   }
  67 }
  68
  69 static void count_hosts(void)
  70 {
  71   host_number++;
  72 }
  73
  74 static void define_callbacks(const char *file)
  75 {
  76   /* Figuring out the network links */
  77   surfxml_add_callback(STag_surfxml_host_cb_list, &count_hosts);
  78   surfxml_add_callback(STag_surfxml_route_cb_list,
  79                        &parse_route_set_endpoints);
  80   surfxml_add_callback(ETag_surfxml_route_cb_list, &parse_route_set_route);
  81 }
  82
  83 static int resource_used(void *resource_id)
  84 {
  85   return 0;
  86 }
  87
  88 static int action_free(surf_action_t action)
  89 {
  90   action->refcount--;
  91   if (!action->refcount) {
  92     xbt_swag_remove(action, action->state_set);
  93     free(action);
  94     return 1;
  95   }
  96   return 0;
  97 }
  98
  99 static void action_use(surf_action_t action)
 100 {
 101   action->refcount++;
 102 }
 103
 104 static void action_cancel(surf_action_t action)
 105 {
 106   return;
 107 }
 108
 109 static void action_recycle(surf_action_t action)
 110 {
 111   return;
 112 }
 113
 114 static double share_resources(double now)
 115 {
 116   surf_action_network_Constant_t action = NULL;
 117   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
 118   double min = -1.0;
 119
 120   xbt_swag_foreach(action, running_actions) {
 121     if (action->latency > 0) {
 122       if (min < 0)
 123         min = action->latency;
 124       else if (action->latency < min)
 125         min = action->latency;
 126     }
 127   }
 128
 129   return min;
 130 }
 131
 132 static void update_actions_state(double now, double delta)
 133 {
 134   surf_action_network_Constant_t action = NULL;
 135   surf_action_network_Constant_t next_action = NULL;
 136   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
 137
 138   xbt_swag_foreach_safe(action, next_action, running_actions) {
 139     if (action->latency > 0) {
 140       if (action->latency > delta) {
 141         double_update(&(action->latency), delta);
 142       } else {
 143         action->latency = 0.0;
 144       }
 145     }
 146     double_update(&(action->generic_action.remains),
 147                   action->generic_action.cost * delta / action->lat_init);
 148     if (action->generic_action.max_duration != NO_MAX_DURATION)
 149       double_update(&(action->generic_action.max_duration), delta);
 150
 151     if (action->generic_action.remains <= 0) {
 152       action->generic_action.finish = surf_get_clock();
 153       surf_network_model->action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 154     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 155                (action->generic_action.max_duration <= 0)) {
 156       action->generic_action.finish = surf_get_clock();
 157       surf_network_model->action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 158     }
 159   }
 160
 161   return;
 162 }
 163
 164 static void update_resource_state(void *id,
 165                                   tmgr_trace_event_t event_type,
 166                                   double value, double time)
 167 {
 168   DIE_IMPOSSIBLE;
 169 }
 170
 171 static surf_action_t communicate(void *src, void *dst, double size,
 172                                  double rate)
 173 {
 174   surf_action_network_Constant_t action = NULL;
 175   network_card_Constant_t card_src = src;
 176   network_card_Constant_t card_dst = dst;
 177
 178   XBT_IN4("(%s,%s,%g,%g)", card_src->generic_resource.name, card_dst->generic_resource.name, size, rate);
 179
 180   action = xbt_new0(s_surf_action_network_Constant_t, 1);
 181
 182   action->generic_action.refcount = 1;
 183   action->generic_action.cost = size;
 184   action->generic_action.remains = size;
 185   action->generic_action.max_duration = NO_MAX_DURATION;
 186   action->generic_action.start = surf_get_clock();
 187   action->generic_action.finish = -1.0;
 188   action->generic_action.model_type = surf_network_model;
 189   action->suspended = 0;
 190
 191   action->latency = random_generate(random_latency);
 192   action->lat_init = action->latency;
 193
 194   if (action->latency <= 0.0)
 195     action->generic_action.state_set =
 196       surf_network_model->states.done_action_set;
 197   else
 198     action->generic_action.state_set =
 199       surf_network_model->states.running_action_set;
 200
 201   xbt_swag_insert(action, action->generic_action.state_set);
 202
 203
 204   XBT_OUT;
 205
 206   return (surf_action_t) action;
 207 }
 208
 209 /* returns an array of link_Constant_t */
 210 static const void **get_route(void *src, void *dst)
 211 {
 212   xbt_assert0(0, "Calling this function does not make any sense");
 213   return (const void **) NULL;
 214 }
 215
 216 static int get_route_size(void *src, void *dst)
 217 {
 218   xbt_assert0(0, "Calling this function does not make any sense");
 219   return 0;
 220 }
 221
 222 static double get_link_bandwidth(const void *link)
 223 {
 224   DIE_IMPOSSIBLE;
 225 }
 226
 227 static double get_link_latency(const void *link)
 228 {
 229   DIE_IMPOSSIBLE;
 230 }
 231
 232 static int link_shared(const void *link)
 233 {
 234   DIE_IMPOSSIBLE;
 235 }
 236
 237 static xbt_dict_t get_properties(void *link)
 238 {
 239   DIE_IMPOSSIBLE;
 240 }
 241
 242 static void action_suspend(surf_action_t action)
 243 {
 244   ((surf_action_network_Constant_t) action)->suspended = 1;
 245 }
 246
 247 static void action_resume(surf_action_t action)
 248 {
 249   if (((surf_action_network_Constant_t) action)->suspended)
 250     ((surf_action_network_Constant_t) action)->suspended = 0;
 251 }
 252
 253 static int action_is_suspended(surf_action_t action)
 254 {
 255   return ((surf_action_network_Constant_t) action)->suspended;
 256 }
 257
 258 static void action_set_max_duration(surf_action_t action, double duration)
 259 {
 260   action->max_duration = duration;
 261 }
 262
 263 static void finalize(void)
 264 {
 265   surf_model_exit(surf_network_model);
 266   surf_network_model = NULL;
 267
 268   card_number = 0;
 269 }
 270
 271 static void surf_network_model_init_internal(void)
 272 {
 273   surf_network_model = surf_model_init();
 274
 275   surf_network_model->name = "network constant";
 276   surf_network_model->action_free = action_free;
 277   surf_network_model->action_use = action_use;
 278   surf_network_model->action_cancel = action_cancel;
 279   surf_network_model->action_recycle = action_recycle;
 280
 281   surf_network_model->model_private->resource_used = resource_used;
 282   surf_network_model->model_private->share_resources = share_resources;
 283   surf_network_model->model_private->update_actions_state =
 284     update_actions_state;
 285   surf_network_model->model_private->update_resource_state =
 286     update_resource_state;
 287   surf_network_model->model_private->finalize = finalize;
 288
 289   surf_network_model->suspend = action_suspend;
 290   surf_network_model->resume = action_resume;
 291   surf_network_model->is_suspended = action_is_suspended;
 292   surf_cpu_model->set_max_duration = action_set_max_duration;
 293
 294   surf_network_model->extension.network.communicate = communicate;
 295   surf_network_model->extension.network.get_route = get_route;
 296   surf_network_model->extension.network.get_route_size = get_route_size;
 297   surf_network_model->extension.network.get_link_bandwidth =
 298     get_link_bandwidth;
 299   surf_network_model->extension.network.get_link_latency = get_link_latency;
 300   surf_network_model->extension.network.link_shared = link_shared;
 301
 302   surf_network_model->get_properties = get_properties;
 303
 304   if (!random_latency)
 305     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 306 }
 307
 308 void surf_network_model_init_Constant(const char *filename)
 309 {
 310
 311   if (surf_network_model)
 312     return;
 313   surf_network_model_init_internal();
 314   define_callbacks(filename);
 315   xbt_dynar_push(model_list, &surf_network_model);
 316
 317   update_model_description(surf_network_model_description,
 318                            "Constant", surf_network_model);
 319 }