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_unref(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_cancel(surf_action_t action)
 100 {
 101   return;
 102 }
 103
 104 static void action_recycle(surf_action_t action)
 105 {
 106   return;
 107 }
 108
 109 static double share_resources(double now)
 110 {
 111   surf_action_network_Constant_t action = NULL;
 112   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
 113   double min = -1.0;
 114
 115   xbt_swag_foreach(action, running_actions) {
 116     if (action->latency > 0) {
 117       if (min < 0)
 118         min = action->latency;
 119       else if (action->latency < min)
 120         min = action->latency;
 121     }
 122   }
 123
 124   return min;
 125 }
 126
 127 static void update_actions_state(double now, double delta)
 128 {
 129   surf_action_network_Constant_t action = NULL;
 130   surf_action_network_Constant_t next_action = NULL;
 131   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
 132
 133   xbt_swag_foreach_safe(action, next_action, running_actions) {
 134     if (action->latency > 0) {
 135       if (action->latency > delta) {
 136         double_update(&(action->latency), delta);
 137       } else {
 138         action->latency = 0.0;
 139       }
 140     }
 141     double_update(&(action->generic_action.remains),
 142                   action->generic_action.cost * delta / action->lat_init);
 143     if (action->generic_action.max_duration != NO_MAX_DURATION)
 144       double_update(&(action->generic_action.max_duration), delta);
 145
 146     if (action->generic_action.remains <= 0) {
 147       action->generic_action.finish = surf_get_clock();
 148       surf_network_model->action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 149     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 150                (action->generic_action.max_duration <= 0)) {
 151       action->generic_action.finish = surf_get_clock();
 152       surf_network_model->action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 153     }
 154   }
 155
 156   return;
 157 }
 158
 159 static void update_resource_state(void *id,
 160                                   tmgr_trace_event_t event_type,
 161                                   double value, double time)
 162 {
 163   DIE_IMPOSSIBLE;
 164 }
 165
 166 static surf_action_t communicate(const char *src_name,const char *dst_name,int src, int dst, double size,
 167     double rate)
 168 {
 169   surf_action_network_Constant_t action = NULL;
 170
 171   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 172
 173   action = xbt_new0(s_surf_action_network_Constant_t, 1);
 174
 175   action->generic_action.refcount = 1;
 176   action->generic_action.cost = size;
 177   action->generic_action.remains = size;
 178   action->generic_action.max_duration = NO_MAX_DURATION;
 179   action->generic_action.start = surf_get_clock();
 180   action->generic_action.finish = -1.0;
 181   action->generic_action.model_type = surf_network_model;
 182   action->suspended = 0;
 183
 184   action->latency = random_generate(random_latency);
 185   action->lat_init = action->latency;
 186
 187   if (action->latency <= 0.0)
 188     action->generic_action.state_set =
 189       surf_network_model->states.done_action_set;
 190   else
 191     action->generic_action.state_set =
 192       surf_network_model->states.running_action_set;
 193
 194   xbt_swag_insert(action, action->generic_action.state_set);
 195
 196
 197   XBT_OUT;
 198
 199   return (surf_action_t) action;
 200 }
 201
 202 /* returns an array of link_Constant_t */
 203 static xbt_dynar_t get_route(void *src, void *dst)
 204 {
 205   xbt_die("Calling this function does not make any sense");
 206 }
 207
 208 static double get_link_bandwidth(const void *link)
 209 {
 210   DIE_IMPOSSIBLE;
 211 }
 212
 213 static double get_link_latency(const void *link)
 214 {
 215   DIE_IMPOSSIBLE;
 216 }
 217
 218 static int link_shared(const void *link)
 219 {
 220   DIE_IMPOSSIBLE;
 221 }
 222
 223 static xbt_dict_t get_properties(void *link)
 224 {
 225   DIE_IMPOSSIBLE;
 226 }
 227
 228 static void action_suspend(surf_action_t action)
 229 {
 230   ((surf_action_network_Constant_t) action)->suspended = 1;
 231 }
 232
 233 static void action_resume(surf_action_t action)
 234 {
 235   if (((surf_action_network_Constant_t) action)->suspended)
 236     ((surf_action_network_Constant_t) action)->suspended = 0;
 237 }
 238
 239 static int action_is_suspended(surf_action_t action)
 240 {
 241   return ((surf_action_network_Constant_t) action)->suspended;
 242 }
 243
 244 static void action_set_max_duration(surf_action_t action, double duration)
 245 {
 246   action->max_duration = duration;
 247 }
 248
 249 static void finalize(void)
 250 {
 251   surf_model_exit(surf_network_model);
 252   surf_network_model = NULL;
 253
 254   card_number = 0;
 255 }
 256
 257 static void surf_network_model_init_internal(void)
 258 {
 259   surf_network_model = surf_model_init();
 260
 261   surf_network_model->name = "network constant";
 262   surf_network_model->action_unref = action_unref;
 263   surf_network_model->action_cancel = action_cancel;
 264   surf_network_model->action_recycle = action_recycle;
 265
 266   surf_network_model->model_private->resource_used = resource_used;
 267   surf_network_model->model_private->share_resources = share_resources;
 268   surf_network_model->model_private->update_actions_state =
 269     update_actions_state;
 270   surf_network_model->model_private->update_resource_state =
 271     update_resource_state;
 272   surf_network_model->model_private->finalize = finalize;
 273
 274   surf_network_model->suspend = action_suspend;
 275   surf_network_model->resume = action_resume;
 276   surf_network_model->is_suspended = action_is_suspended;
 277   surf_cpu_model->set_max_duration = action_set_max_duration;
 278
 279   surf_network_model->extension.network.communicate = communicate;
 280   surf_network_model->extension.network.get_link_bandwidth =
 281     get_link_bandwidth;
 282   surf_network_model->extension.network.get_link_latency = get_link_latency;
 283   surf_network_model->extension.network.link_shared = link_shared;
 284
 285   surf_network_model->get_properties = get_properties;
 286
 287   if (!random_latency)
 288     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 289 }
 290
 291 void surf_network_model_init_Constant(const char *filename)
 292 {
 293
 294   if (surf_network_model)
 295     return;
 296   surf_network_model_init_internal();
 297   define_callbacks(filename);
 298   xbt_dynar_push(model_list, &surf_network_model);
 299
 300   update_model_description(surf_network_model_description,
 301                            "Constant", surf_network_model);
 302 }