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(void *src, void *dst, double size,
 167                                  double rate)
 168 {
 169   surf_action_network_Constant_t action = NULL;
 170   network_card_Constant_t card_src = src;
 171   network_card_Constant_t card_dst = dst;
 172
 173   XBT_IN4("(%s,%s,%g,%g)", card_src->generic_resource.name, card_dst->generic_resource.name, size, rate);
 174
 175   action = xbt_new0(s_surf_action_network_Constant_t, 1);
 176
 177   action->generic_action.refcount = 1;
 178   action->generic_action.cost = size;
 179   action->generic_action.remains = size;
 180   action->generic_action.max_duration = NO_MAX_DURATION;
 181   action->generic_action.start = surf_get_clock();
 182   action->generic_action.finish = -1.0;
 183   action->generic_action.model_type = surf_network_model;
 184   action->suspended = 0;
 185
 186   action->latency = random_generate(random_latency);
 187   action->lat_init = action->latency;
 188
 189   if (action->latency <= 0.0)
 190     action->generic_action.state_set =
 191       surf_network_model->states.done_action_set;
 192   else
 193     action->generic_action.state_set =
 194       surf_network_model->states.running_action_set;
 195
 196   xbt_swag_insert(action, action->generic_action.state_set);
 197
 198
 199   XBT_OUT;
 200
 201   return (surf_action_t) action;
 202 }
 203
 204 /* returns an array of link_Constant_t */
 205 static xbt_dynar_t get_route(void *src, void *dst)
 206 {
 207   xbt_die("Calling this function does not make any sense");
 208 }
 209
 210 static double get_link_bandwidth(const void *link)
 211 {
 212   DIE_IMPOSSIBLE;
 213 }
 214
 215 static double get_link_latency(const void *link)
 216 {
 217   DIE_IMPOSSIBLE;
 218 }
 219
 220 static int link_shared(const void *link)
 221 {
 222   DIE_IMPOSSIBLE;
 223 }
 224
 225 static xbt_dict_t get_properties(void *link)
 226 {
 227   DIE_IMPOSSIBLE;
 228 }
 229
 230 static void action_suspend(surf_action_t action)
 231 {
 232   ((surf_action_network_Constant_t) action)->suspended = 1;
 233 }
 234
 235 static void action_resume(surf_action_t action)
 236 {
 237   if (((surf_action_network_Constant_t) action)->suspended)
 238     ((surf_action_network_Constant_t) action)->suspended = 0;
 239 }
 240
 241 static int action_is_suspended(surf_action_t action)
 242 {
 243   return ((surf_action_network_Constant_t) action)->suspended;
 244 }
 245
 246 static void action_set_max_duration(surf_action_t action, double duration)
 247 {
 248   action->max_duration = duration;
 249 }
 250
 251 static void finalize(void)
 252 {
 253   surf_model_exit(surf_network_model);
 254   surf_network_model = NULL;
 255
 256   card_number = 0;
 257 }
 258
 259 static void surf_network_model_init_internal(void)
 260 {
 261   surf_network_model = surf_model_init();
 262
 263   surf_network_model->name = "network constant";
 264   surf_network_model->action_unref = action_unref;
 265   surf_network_model->action_cancel = action_cancel;
 266   surf_network_model->action_recycle = action_recycle;
 267
 268   surf_network_model->model_private->resource_used = resource_used;
 269   surf_network_model->model_private->share_resources = share_resources;
 270   surf_network_model->model_private->update_actions_state =
 271     update_actions_state;
 272   surf_network_model->model_private->update_resource_state =
 273     update_resource_state;
 274   surf_network_model->model_private->finalize = finalize;
 275
 276   surf_network_model->suspend = action_suspend;
 277   surf_network_model->resume = action_resume;
 278   surf_network_model->is_suspended = action_is_suspended;
 279   surf_cpu_model->set_max_duration = action_set_max_duration;
 280
 281   surf_network_model->extension.network.communicate = communicate;
 282   surf_network_model->extension.network.get_route = get_route;
 283   surf_network_model->extension.network.get_link_bandwidth =
 284     get_link_bandwidth;
 285   surf_network_model->extension.network.get_link_latency = get_link_latency;
 286   surf_network_model->extension.network.link_shared = link_shared;
 287
 288   surf_network_model->get_properties = get_properties;
 289
 290   if (!random_latency)
 291     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 292 }
 293
 294 void surf_network_model_init_Constant(const char *filename)
 295 {
 296
 297   if (surf_network_model)
 298     return;
 299   surf_network_model_init_internal();
 300   define_callbacks(filename);
 301   xbt_dynar_push(model_list, &surf_network_model);
 302
 303   update_model_description(surf_network_model_description,
 304                            "Constant", surf_network_model);
 305 }