src/surf/network_vivaldi.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 "surf/random_mgr.h"
  10 #include "xbt/dict.h"
  11 #include "xbt/str.h"
  12 #include "xbt/log.h"
  13
  14 typedef struct surf_action_network_Vivaldi {
  15   s_surf_action_t generic_action;
  16   double latency;
  17   double lat_init;
  18   int suspended;
  19 } s_surf_action_network_Vivaldi_t, *surf_action_network_Vivaldi_t;
  20
  21 typedef struct s_netviva_coords {
  22   double x,y,h;
  23 } s_netviva_coords_t, *netviva_coords_t;
  24 xbt_dict_t coords; /* Host name -> coordinates */
  25
  26 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  27 static random_data_t random_latency = NULL;
  28 static int host_number_int = 0;
  29
  30 static void netviva_count_hosts(void)
  31 {
  32   host_number_int++;
  33 }
  34
  35 static void netviva_define_callbacks(const char *file)
  36 {
  37   surfxml_add_callback(STag_surfxml_host_cb_list, &netviva_count_hosts);
  38 }
  39
  40 static int netviva_resource_used(void *resource_id) {
  41   /* nothing to do here */
  42   return 0;
  43 }
  44
  45 static int netviva_action_unref(surf_action_t action)
  46 {
  47   action->refcount--;
  48   if (!action->refcount) {
  49     xbt_swag_remove(action, action->state_set);
  50     free(action);
  51     return 1;
  52   }
  53   return 0;
  54 }
  55
  56 static void netviva_action_cancel(surf_action_t action)
  57 {
  58   return;
  59 }
  60
  61 static void netviva_action_recycle(surf_action_t action)
  62 {
  63   return;
  64 }
  65
  66 static double netviva_action_get_remains(surf_action_t action)
  67 {
  68   return action->remains;
  69 }
  70
  71 /* look for the next event to finish */
  72 static double netviva_share_resources(double now)
  73 {
  74   surf_action_network_Vivaldi_t action = NULL;
  75   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  76   double min = -1.0;
  77
  78   xbt_swag_foreach(action, running_actions) {
  79     if (action->latency > 0) {
  80       if (min < 0)
  81         min = action->latency;
  82       else if (action->latency < min)
  83         min = action->latency;
  84     }
  85   }
  86
  87   return min;
  88 }
  89
  90 static void netviva_update_actions_state(double now, double delta) {
  91   /* Advance the actions by delta seconds */
  92   surf_action_network_Vivaldi_t action = NULL;
  93   surf_action_network_Vivaldi_t next_action = NULL;
  94   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  95
  96   xbt_swag_foreach_safe(action, next_action, running_actions) {
  97     if (action->latency > 0) {
  98       if (action->latency > delta) {
  99         double_update(&(action->latency), delta);
 100       } else {
 101         action->latency = 0.0;
 102       }
 103     }
 104     double_update(&(action->generic_action.remains),
 105                   action->generic_action.cost * delta / action->lat_init);
 106     if (action->generic_action.max_duration != NO_MAX_DURATION)
 107       double_update(&(action->generic_action.max_duration), delta);
 108
 109     if (action->generic_action.remains <= 0) { /* This action is done, inform SURF about it */
 110       action->generic_action.finish = surf_get_clock();
 111       surf_network_model->action_state_set((surf_action_t) action,
 112                                            SURF_ACTION_DONE);
 113     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 114                && (action->generic_action.max_duration <= 0)) {
 115       action->generic_action.finish = surf_get_clock();
 116       surf_network_model->action_state_set((surf_action_t) action,
 117                                            SURF_ACTION_DONE);
 118     }
 119   }
 120 }
 121
 122 static void netviva_update_resource_state(void *id,
 123                                   tmgr_trace_event_t event_type,
 124                                   double value, double time)
 125 { /* Called as soon as there is a trace modification */
 126   DIE_IMPOSSIBLE;
 127 }
 128
 129 static surf_action_t netviva_communicate(const char *src_name, const char *dst_name,
 130                                  int src, int dst, double size, double rate)
 131 {
 132   netviva_coords_t c1,c2;
 133   c1 = xbt_dict_get(coords,src_name);
 134   c2 = xbt_dict_get(coords,dst_name);
 135
 136   surf_action_network_Vivaldi_t action = NULL;
 137
 138   action =
 139     surf_action_new(sizeof(s_surf_action_network_Vivaldi_t), size,
 140                     surf_network_model, 0);
 141
 142   action->suspended = 0;
 143
 144   action->latency = sqrt((c1->x-c2->x)*(c1->x-c2->x) + (c1->y-c2->y)*(c1->y-c2->y)) + fabs(c1->h)+ fabs(c2->h) ;          //random_generate(random_latency);
 145   action->lat_init = action->latency;
 146
 147   if (action->latency <= 0.0) {
 148     action->generic_action.state_set =
 149       surf_network_model->states.done_action_set;
 150     xbt_swag_insert(action, action->generic_action.state_set);
 151   }
 152
 153   return (surf_action_t) action;
 154 }
 155
 156 /* returns an array of link_Vivaldi_t */
 157 static xbt_dynar_t netviva_get_route(void *src, void *dst)
 158 {
 159   xbt_die("Calling this function does not make any sense");
 160 }
 161
 162 static double netviva_get_link_bandwidth(const void *link)
 163 {
 164   DIE_IMPOSSIBLE;
 165 }
 166
 167 static double netviva_get_link_latency(const void *link)
 168 {
 169   DIE_IMPOSSIBLE;
 170 }
 171
 172 static int link_shared(const void *link)
 173 {
 174   DIE_IMPOSSIBLE;
 175 }
 176
 177 static void netviva_action_suspend(surf_action_t action)
 178 {
 179   ((surf_action_network_Vivaldi_t) action)->suspended = 1;
 180 }
 181
 182 static void netviva_action_resume(surf_action_t action)
 183 {
 184   if (((surf_action_network_Vivaldi_t) action)->suspended)
 185     ((surf_action_network_Vivaldi_t) action)->suspended = 0;
 186 }
 187
 188 static int netviva_action_is_suspended(surf_action_t action)
 189 {
 190   return ((surf_action_network_Vivaldi_t) action)->suspended;
 191 }
 192
 193 static void netviva_action_set_max_duration(surf_action_t action, double duration)
 194 {
 195   action->max_duration = duration;
 196 }
 197
 198 static void netviva_finalize(void)
 199 {
 200   surf_model_exit(surf_network_model);
 201   surf_network_model = NULL;
 202 }
 203
 204
 205 static void net_define_callbacks(const char *file)
 206 {
 207   /* Figuring out the network links */
 208 }
 209
 210 static void netviva_parse_host(void) {
 211   netviva_coords_t coord = xbt_new(s_netviva_coords_t,1);
 212
 213   xbt_dynar_t ctn =xbt_str_split_str(A_surfxml_host_vivaldi," ");
 214
 215   coord->x = atof(xbt_dynar_get_as(ctn, 0, char*));
 216   coord->y = atof(xbt_dynar_get_as(ctn, 1, char*));
 217   coord->h = atof(xbt_dynar_get_as(ctn, 2, char*));
 218
 219   xbt_dynar_free(&ctn);
 220   xbt_dict_set(coords, A_surfxml_host_id,coord,NULL);
 221 }
 222
 223 void surf_network_model_init_Vivaldi(const char *filename)
 224 {
 225   xbt_assert(surf_network_model == NULL);
 226   if (surf_network_model)
 227     return;
 228   surf_network_model = surf_model_init();
 229   coords = xbt_dict_new();
 230
 231   INFO0("Blih");
 232   surf_network_model->name = "Vivaldi time network";
 233   surf_network_model->action_unref = netviva_action_unref;
 234   surf_network_model->action_cancel = netviva_action_cancel;
 235   surf_network_model->action_recycle = netviva_action_recycle;
 236   surf_network_model->get_remains = netviva_action_get_remains;
 237
 238   surf_network_model->model_private->resource_used = netviva_resource_used;
 239   surf_network_model->model_private->share_resources = netviva_share_resources;
 240   surf_network_model->model_private->update_actions_state =
 241     netviva_update_actions_state;
 242   surf_network_model->model_private->update_resource_state =
 243     netviva_update_resource_state;
 244   surf_network_model->model_private->finalize = netviva_finalize;
 245
 246   surf_network_model->suspend = netviva_action_suspend;
 247   surf_network_model->resume = netviva_action_resume;
 248   surf_network_model->is_suspended = netviva_action_is_suspended;
 249   surf_cpu_model->set_max_duration = netviva_action_set_max_duration;
 250
 251   surf_network_model->extension.network.communicate = netviva_communicate;
 252   surf_network_model->extension.network.get_link_bandwidth =
 253     netviva_get_link_bandwidth;
 254   surf_network_model->extension.network.get_link_latency = netviva_get_link_latency;
 255   surf_network_model->extension.network.link_shared = link_shared;
 256
 257   if (!random_latency)
 258     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 259   netviva_define_callbacks(filename);
 260   xbt_dynar_push(model_list, &surf_network_model);
 261
 262   /* Callbacks settings */
 263   surfxml_add_callback(STag_surfxml_host_cb_list, &netviva_parse_host);
 264
 265   update_model_description(surf_network_model_description,
 266                            "Vivaldi", surf_network_model);
 267
 268   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 269   routing_model_create(sizeof(double), NULL);
 270 }
 271