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   /* nothing to do here */
  41   return 0;
  42 }
  43
  44 static int netviva_action_unref(surf_action_t action)
  45 {
  46   action->refcount--;
  47   if (!action->refcount) {
  48     xbt_swag_remove(action, action->state_set);
  49     free(action);
  50     return 1;
  51   }
  52   return 0;
  53 }
  54
  55 static void netviva_action_cancel(surf_action_t action)
  56 {
  57   return;
  58 }
  59
  60 static void netviva_action_recycle(surf_action_t action)
  61 {
  62   return;
  63 }
  64
  65 static double netviva_action_get_remains(surf_action_t action)
  66 {
  67   return action->remains;
  68 }
  69
  70 /* look for the next event to finish */
  71 static double netviva_share_resources(double now)
  72 {
  73   surf_action_network_Vivaldi_t action = NULL;
  74   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  75   double min = -1.0;
  76
  77   xbt_swag_foreach(action, running_actions) {
  78     if (action->latency > 0) {
  79       if (min < 0)
  80         min = action->latency;
  81       else if (action->latency < min)
  82         min = action->latency;
  83     }
  84   }
  85
  86   return min;
  87 }
  88
  89 static void netviva_update_actions_state(double now, double delta) {
  90   /* Advance the actions by delta seconds */
  91   surf_action_network_Vivaldi_t action = NULL;
  92   surf_action_network_Vivaldi_t next_action = NULL;
  93   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  94
  95   xbt_swag_foreach_safe(action, next_action, running_actions) {
  96     if (action->latency > 0) {
  97       if (action->latency > delta) {
  98         double_update(&(action->latency), delta);
  99       } else {
 100         action->latency = 0.0;
 101       }
 102     }
 103     double_update(&(action->generic_action.remains),
 104                   action->generic_action.cost * delta / action->lat_init);
 105     if (action->generic_action.max_duration != NO_MAX_DURATION)
 106       double_update(&(action->generic_action.max_duration), delta);
 107
 108     if (action->generic_action.remains <= 0) { /* This action is done, inform SURF about it */
 109       action->generic_action.finish = surf_get_clock();
 110       surf_network_model->action_state_set((surf_action_t) action,
 111                                            SURF_ACTION_DONE);
 112     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 113                && (action->generic_action.max_duration <= 0)) {
 114       action->generic_action.finish = surf_get_clock();
 115       surf_network_model->action_state_set((surf_action_t) action,
 116                                            SURF_ACTION_DONE);
 117     }
 118   }
 119 }
 120
 121 static void netviva_update_resource_state(void *id,
 122                                   tmgr_trace_event_t event_type,
 123                                   double value, double time)
 124 { /* Called as soon as there is a trace modification */
 125   DIE_IMPOSSIBLE;
 126 }
 127
 128 static surf_action_t netviva_communicate(const char *src_name, const char *dst_name,
 129                                   double size, double rate)
 130 {
 131   surf_action_network_Vivaldi_t action = NULL;
 132   netviva_coords_t c1,c2;
 133   c1 = xbt_dict_get(coords,src_name);
 134   c2 = xbt_dict_get(coords,dst_name);
 135
 136   action = surf_action_new(sizeof(s_surf_action_network_Vivaldi_t), size,surf_network_model, 0);
 137
 138   action->suspended = 0;
 139
 140   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);
 141   action->lat_init = action->latency;
 142
 143   if (action->latency <= 0.0) {
 144     action->generic_action.state_set =
 145       surf_network_model->states.done_action_set;
 146     xbt_swag_insert(action, action->generic_action.state_set);
 147   }
 148
 149   return (surf_action_t) action;
 150 }
 151
 152 /* returns an array of link_Vivaldi_t */
 153 static xbt_dynar_t netviva_get_route(void *src, void *dst)
 154 {
 155   xbt_die("Calling this function does not make any sense");
 156 }
 157
 158 static double netviva_get_link_bandwidth(const void *link)
 159 {
 160   DIE_IMPOSSIBLE;
 161 }
 162
 163 static double netviva_get_link_latency(const void *link)
 164 {
 165   DIE_IMPOSSIBLE;
 166 }
 167
 168 static int netviva_link_shared(const void *link)
 169 {
 170   DIE_IMPOSSIBLE;
 171 }
 172
 173 static void netviva_action_suspend(surf_action_t action)
 174 {
 175   ((surf_action_network_Vivaldi_t) action)->suspended = 1;
 176 }
 177
 178 static void netviva_action_resume(surf_action_t action)
 179 {
 180   if (((surf_action_network_Vivaldi_t) action)->suspended)
 181     ((surf_action_network_Vivaldi_t) action)->suspended = 0;
 182 }
 183
 184 static int netviva_action_is_suspended(surf_action_t action)
 185 {
 186   return ((surf_action_network_Vivaldi_t) action)->suspended;
 187 }
 188
 189 static void netviva_action_set_max_duration(surf_action_t action, double duration)
 190 {
 191   action->max_duration = duration;
 192 }
 193
 194 static void netviva_finalize(void)
 195 {
 196   surf_model_exit(surf_network_model);
 197   surf_network_model = NULL;
 198 }
 199
 200 static void netviva_parse_host(void) {
 201   netviva_coords_t coord = xbt_new(s_netviva_coords_t,1);
 202
 203   xbt_dynar_t ctn =xbt_str_split_str(A_surfxml_host_vivaldi," ");
 204
 205   coord->x = atof(xbt_dynar_get_as(ctn, 0, char*));
 206   coord->y = atof(xbt_dynar_get_as(ctn, 1, char*));
 207   coord->h = atof(xbt_dynar_get_as(ctn, 2, char*));
 208
 209 #ifdef HAVE_TRACING
 210   TRACE_surf_host_vivaldi_parse (A_surfxml_host_id, coord->x, coord->y, coord->h);
 211 #endif
 212
 213   xbt_dynar_free(&ctn);
 214   xbt_dict_set(coords, A_surfxml_host_id,coord,NULL);
 215 }
 216
 217 #ifdef HAVE_LATENCY_BOUND_TRACKING
 218 static int netviva_get_latency_limited(surf_action_t action){
 219   return 0;
 220 }
 221 #endif
 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 #ifdef HAVE_LATENCY_BOUND_TRACKING
 238   surf_network_model->get_latency_limited = netviva_get_latency_limited;
 239 #endif
 240
 241   surf_network_model->model_private->resource_used = netviva_resource_used;
 242   surf_network_model->model_private->share_resources = netviva_share_resources;
 243   surf_network_model->model_private->update_actions_state =
 244     netviva_update_actions_state;
 245   surf_network_model->model_private->update_resource_state =
 246     netviva_update_resource_state;
 247   surf_network_model->model_private->finalize = netviva_finalize;
 248
 249   surf_network_model->suspend = netviva_action_suspend;
 250   surf_network_model->resume = netviva_action_resume;
 251   surf_network_model->is_suspended = netviva_action_is_suspended;
 252   surf_cpu_model->set_max_duration = netviva_action_set_max_duration;
 253
 254   surf_network_model->extension.network.communicate = netviva_communicate;
 255   surf_network_model->extension.network.get_link_bandwidth =
 256     netviva_get_link_bandwidth;
 257   surf_network_model->extension.network.get_link_latency = netviva_get_link_latency;
 258   surf_network_model->extension.network.link_shared = netviva_link_shared;
 259
 260   if (!random_latency_viva)
 261     random_latency_viva = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 262   netviva_define_callbacks(filename);
 263   xbt_dynar_push(model_list, &surf_network_model);
 264
 265   /* Callbacks settings */
 266   surfxml_add_callback(STag_surfxml_host_cb_list, &netviva_parse_host);
 267
 268   update_model_description(surf_network_model_description,
 269                            "Vivaldi", surf_network_model);
 270
 271 #ifdef HAVE_TRACING
 272   __TRACE_host_variable(0,"vivaldi_x",0,"declare");
 273   __TRACE_host_variable(0,"vivaldi_y",0,"declare");
 274   __TRACE_host_variable(0,"vivaldi_h",0,"declare");
 275 #endif
 276
 277   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 278   routing_model_create(sizeof(double), NULL);
 279 }
 280