src/surf/network_vivaldi.c

   1 /* Copyright (c) 2010. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "surf_private.h"
   8 #include "surf/random_mgr.h"
   9 #include "xbt/dict.h"
  10 #include "xbt/str.h"
  11 #include "xbt/log.h"
  12
  13 typedef struct surf_action_network_Vivaldi {
  14   s_surf_action_t generic_action;
  15   double latency;
  16   double lat_init;
  17   int suspended;
  18 } s_surf_action_network_Vivaldi_t, *surf_action_network_Vivaldi_t;
  19
  20 typedef struct s_netviva_coords {
  21   double x, y, h;
  22 } s_netviva_coords_t, *netviva_coords_t;
  23 xbt_dict_t coords;              /* Host name -> coordinates */
  24
  25 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  26 static random_data_t random_latency_viva = NULL;
  27 static int host_number_int_viva = 0;
  28
  29 static void netviva_count_hosts(void)
  30 {
  31   host_number_int_viva++;
  32 }
  33
  34 static void netviva_define_callbacks(const char *file)
  35 {
  36   surfxml_add_callback(STag_surfxml_host_cb_list, &netviva_count_hosts);
  37 }
  38
  39 static int netviva_resource_used(void *resource_id)
  40 {
  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 #ifdef HAVE_TRACING
  51     if (action->category)
  52       xbt_free(action->category);
  53 #endif
  54     free(action);
  55     return 1;
  56   }
  57   return 0;
  58 }
  59
  60 static void netviva_action_cancel(surf_action_t action)
  61 {
  62   return;
  63 }
  64
  65 static void netviva_action_recycle(surf_action_t action)
  66 {
  67   return;
  68 }
  69
  70 static double netviva_action_get_remains(surf_action_t action)
  71 {
  72   return action->remains;
  73 }
  74
  75 /* look for the next event to finish */
  76 static double netviva_share_resources(double now)
  77 {
  78   surf_action_network_Vivaldi_t action = NULL;
  79   xbt_swag_t running_actions =
  80       surf_network_model->states.running_action_set;
  81   double min = -1.0;
  82
  83   xbt_swag_foreach(action, running_actions) {
  84     if (action->latency > 0) {
  85       if (min < 0)
  86         min = action->latency;
  87       else if (action->latency < min)
  88         min = action->latency;
  89     }
  90   }
  91
  92   return min;
  93 }
  94
  95 static void netviva_update_actions_state(double now, double delta)
  96 {
  97   /* Advance the actions by delta seconds */
  98   surf_action_network_Vivaldi_t action = NULL;
  99   surf_action_network_Vivaldi_t next_action = NULL;
 100   xbt_swag_t running_actions =
 101       surf_network_model->states.running_action_set;
 102
 103   xbt_swag_foreach_safe(action, next_action, running_actions) {
 104     if (action->latency > 0) {
 105       if (action->latency > delta) {
 106         double_update(&(action->latency), delta);
 107       } else {
 108         action->latency = 0.0;
 109       }
 110     }
 111     double_update(&(action->generic_action.remains),
 112                   action->generic_action.cost * delta / action->lat_init);
 113     if (action->generic_action.max_duration != NO_MAX_DURATION)
 114       double_update(&(action->generic_action.max_duration), delta);
 115
 116     if (action->generic_action.remains <= 0) {  /* This action is done, inform SURF about it */
 117       action->generic_action.finish = surf_get_clock();
 118       surf_network_model->action_state_set((surf_action_t) action,
 119                                            SURF_ACTION_DONE);
 120     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 121                && (action->generic_action.max_duration <= 0)) {
 122       action->generic_action.finish = surf_get_clock();
 123       surf_network_model->action_state_set((surf_action_t) action,
 124                                            SURF_ACTION_DONE);
 125     }
 126   }
 127 }
 128
 129 static void netviva_update_resource_state(void *id,
 130                                           tmgr_trace_event_t event_type,
 131                                           double value, double time)
 132 {                               /* Called as soon as there is a trace modification */
 133   DIE_IMPOSSIBLE;
 134 }
 135
 136 static surf_action_t netviva_communicate(const char *src_name,
 137                                          const char *dst_name, double size,
 138                                          double rate)
 139 {
 140   surf_action_network_Vivaldi_t action = NULL;
 141   netviva_coords_t c1, c2;
 142   c1 = xbt_dict_get(coords, src_name);
 143   c2 = xbt_dict_get(coords, dst_name);
 144
 145   action =
 146       surf_action_new(sizeof(s_surf_action_network_Vivaldi_t), size,
 147                       surf_network_model, 0);
 148
 149   action->suspended = 0;
 150
 151   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_viva);
 152   action->lat_init = action->latency;
 153
 154   if (action->latency <= 0.0) {
 155     action->generic_action.state_set =
 156         surf_network_model->states.done_action_set;
 157     xbt_swag_insert(action, action->generic_action.state_set);
 158   }
 159
 160   return (surf_action_t) action;
 161 }
 162
 163 /* returns an array of link_Vivaldi_t */
 164 static xbt_dynar_t netviva_get_route(void *src, void *dst)
 165 {
 166   xbt_die("Calling this function does not make any sense");
 167 }
 168
 169 static double netviva_get_link_bandwidth(const void *link)
 170 {
 171   DIE_IMPOSSIBLE;
 172 }
 173
 174 static double netviva_get_link_latency(const void *link)
 175 {
 176   DIE_IMPOSSIBLE;
 177 }
 178
 179 static int netviva_link_shared(const void *link)
 180 {
 181   DIE_IMPOSSIBLE;
 182 }
 183
 184 static void netviva_action_suspend(surf_action_t action)
 185 {
 186   ((surf_action_network_Vivaldi_t) action)->suspended = 1;
 187 }
 188
 189 static void netviva_action_resume(surf_action_t action)
 190 {
 191   if (((surf_action_network_Vivaldi_t) action)->suspended)
 192     ((surf_action_network_Vivaldi_t) action)->suspended = 0;
 193 }
 194
 195 static int netviva_action_is_suspended(surf_action_t action)
 196 {
 197   return ((surf_action_network_Vivaldi_t) action)->suspended;
 198 }
 199
 200 static void netviva_action_set_max_duration(surf_action_t action,
 201                                             double duration)
 202 {
 203   action->max_duration = duration;
 204 }
 205
 206 static void netviva_finalize(void)
 207 {
 208   surf_model_exit(surf_network_model);
 209   surf_network_model = NULL;
 210 }
 211
 212 static void netviva_parse_host(void)
 213 {
 214   netviva_coords_t coord = xbt_new(s_netviva_coords_t, 1);
 215
 216   xbt_dynar_t ctn = xbt_str_split_str(A_surfxml_host_vivaldi, " ");
 217
 218   coord->x = atof(xbt_dynar_get_as(ctn, 0, char *));
 219   coord->y = atof(xbt_dynar_get_as(ctn, 1, char *));
 220   coord->h = atof(xbt_dynar_get_as(ctn, 2, char *));
 221
 222 #ifdef HAVE_TRACING
 223   TRACE_surf_host_vivaldi_parse(A_surfxml_host_id, coord->x, coord->y,
 224                                 coord->h);
 225 #endif
 226
 227   xbt_dynar_free(&ctn);
 228   xbt_dict_set(coords, A_surfxml_host_id, coord, NULL);
 229 }
 230
 231 #ifdef HAVE_LATENCY_BOUND_TRACKING
 232 static int netviva_get_latency_limited(surf_action_t action)
 233 {
 234   return 0;
 235 }
 236 #endif
 237
 238 void surf_network_model_init_Vivaldi(const char *filename)
 239 {
 240   xbt_assert(surf_network_model == NULL);
 241   if (surf_network_model)
 242     return;
 243   surf_network_model = surf_model_init();
 244   coords = xbt_dict_new();
 245
 246   INFO0("Blih");
 247   surf_network_model->name = "Vivaldi time network";
 248   surf_network_model->action_unref = netviva_action_unref;
 249   surf_network_model->action_cancel = netviva_action_cancel;
 250   surf_network_model->action_recycle = netviva_action_recycle;
 251   surf_network_model->get_remains = netviva_action_get_remains;
 252 #ifdef HAVE_LATENCY_BOUND_TRACKING
 253   surf_network_model->get_latency_limited = netviva_get_latency_limited;
 254 #endif
 255
 256   surf_network_model->model_private->resource_used = netviva_resource_used;
 257   surf_network_model->model_private->share_resources =
 258       netviva_share_resources;
 259   surf_network_model->model_private->update_actions_state =
 260       netviva_update_actions_state;
 261   surf_network_model->model_private->update_resource_state =
 262       netviva_update_resource_state;
 263   surf_network_model->model_private->finalize = netviva_finalize;
 264
 265   surf_network_model->suspend = netviva_action_suspend;
 266   surf_network_model->resume = netviva_action_resume;
 267   surf_network_model->is_suspended = netviva_action_is_suspended;
 268   surf_cpu_model->set_max_duration = netviva_action_set_max_duration;
 269
 270   surf_network_model->extension.network.communicate = netviva_communicate;
 271   surf_network_model->extension.network.get_link_bandwidth =
 272       netviva_get_link_bandwidth;
 273   surf_network_model->extension.network.get_link_latency =
 274       netviva_get_link_latency;
 275   surf_network_model->extension.network.link_shared = netviva_link_shared;
 276
 277   if (!random_latency_viva)
 278     random_latency_viva = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 279   netviva_define_callbacks(filename);
 280   xbt_dynar_push(model_list, &surf_network_model);
 281
 282   /* Callbacks settings */
 283   surfxml_add_callback(STag_surfxml_host_cb_list, &netviva_parse_host);
 284
 285   update_model_description(surf_network_model_description,
 286                            "Vivaldi", surf_network_model);
 287
 288 #ifdef HAVE_TRACING
 289   TRACE_user_host_variable(0, "vivaldi_x", 0, "declare");
 290   TRACE_user_host_variable(0, "vivaldi_y", 0, "declare");
 291   TRACE_user_host_variable(0, "vivaldi_h", 0, "declare");
 292 #endif
 293
 294   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 295   routing_model_create(sizeof(double), NULL);
 296 }