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