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 "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_Constant {
  15   s_surf_action_t generic_action;
  16   double latency;
  17   double lat_init;
  18   int suspended;
  19 } s_surf_action_network_Constant_t, *surf_action_network_Constant_t;
  20
  21 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  22 static random_data_t random_latency = NULL;
  23 static int host_number = 0;
  24
  25 static void count_hosts(void)
  26 {
  27   host_number++;
  28 }
  29
  30 static void define_callbacks(const char *file)
  31 {
  32   /* Figuring out the network links */
  33   surfxml_add_callback(STag_surfxml_host_cb_list, &count_hosts);
  34 }
  35
  36 static int resource_used(void *resource_id)
  37 {
  38   return 0;
  39 }
  40
  41 static int action_unref(surf_action_t action)
  42 {
  43   action->refcount--;
  44   if (!action->refcount) {
  45     xbt_swag_remove(action, action->state_set);
  46     free(action);
  47     return 1;
  48   }
  49   return 0;
  50 }
  51
  52 static void action_cancel(surf_action_t action)
  53 {
  54   return;
  55 }
  56
  57 static void action_recycle(surf_action_t action)
  58 {
  59   return;
  60 }
  61
  62 static double action_get_remains(surf_action_t action)
  63 {
  64   return action->remains;
  65 }
  66
  67 static double share_resources(double now)
  68 {
  69   surf_action_network_Constant_t action = NULL;
  70   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  71   double min = -1.0;
  72
  73   xbt_swag_foreach(action, running_actions) {
  74     if (action->latency > 0) {
  75       if (min < 0)
  76         min = action->latency;
  77       else if (action->latency < min)
  78         min = action->latency;
  79     }
  80   }
  81
  82   return min;
  83 }
  84
  85 static void update_actions_state(double now, double delta)
  86 {
  87   surf_action_network_Constant_t action = NULL;
  88   surf_action_network_Constant_t next_action = NULL;
  89   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  90
  91   xbt_swag_foreach_safe(action, next_action, running_actions) {
  92     if (action->latency > 0) {
  93       if (action->latency > delta) {
  94         double_update(&(action->latency), delta);
  95       } else {
  96         action->latency = 0.0;
  97       }
  98     }
  99     double_update(&(action->generic_action.remains),
 100                   action->generic_action.cost * delta / action->lat_init);
 101     if (action->generic_action.max_duration != NO_MAX_DURATION)
 102       double_update(&(action->generic_action.max_duration), delta);
 103
 104     if (action->generic_action.remains <= 0) {
 105       action->generic_action.finish = surf_get_clock();
 106       surf_network_model->action_state_set((surf_action_t) action,
 107                                            SURF_ACTION_DONE);
 108     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 109                && (action->generic_action.max_duration <= 0)) {
 110       action->generic_action.finish = surf_get_clock();
 111       surf_network_model->action_state_set((surf_action_t) action,
 112                                            SURF_ACTION_DONE);
 113     }
 114   }
 115 }
 116
 117 static void update_resource_state(void *id,
 118                                   tmgr_trace_event_t event_type,
 119                                   double value, double time)
 120 {
 121   DIE_IMPOSSIBLE;
 122 }
 123
 124 static surf_action_t communicate(const char *src_name, const char *dst_name,
 125                                  int src, int dst, double size, double rate)
 126 {
 127   surf_action_network_Constant_t action = NULL;
 128
 129   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 130
 131   action =
 132     surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
 133                     surf_network_model, 0);
 134
 135   action->suspended = 0;
 136
 137   action->latency = 1;          //random_generate(random_latency);
 138   action->lat_init = action->latency;
 139
 140   if (action->latency <= 0.0) {
 141     action->generic_action.state_set =
 142       surf_network_model->states.done_action_set;
 143     xbt_swag_insert(action, action->generic_action.state_set);
 144   }
 145
 146   XBT_OUT;
 147
 148   return (surf_action_t) action;
 149 }
 150
 151 /* returns an array of link_Constant_t */
 152 static xbt_dynar_t get_route(void *src, void *dst)
 153 {
 154   xbt_die("Calling this function does not make any sense");
 155 }
 156
 157 static double get_link_bandwidth(const void *link)
 158 {
 159   DIE_IMPOSSIBLE;
 160 }
 161
 162 static double get_link_latency(const void *link)
 163 {
 164   DIE_IMPOSSIBLE;
 165 }
 166
 167 static int link_shared(const void *link)
 168 {
 169   DIE_IMPOSSIBLE;
 170 }
 171
 172 static void action_suspend(surf_action_t action)
 173 {
 174   ((surf_action_network_Constant_t) action)->suspended = 1;
 175 }
 176
 177 static void action_resume(surf_action_t action)
 178 {
 179   if (((surf_action_network_Constant_t) action)->suspended)
 180     ((surf_action_network_Constant_t) action)->suspended = 0;
 181 }
 182
 183 static int action_is_suspended(surf_action_t action)
 184 {
 185   return ((surf_action_network_Constant_t) action)->suspended;
 186 }
 187
 188 static void action_set_max_duration(surf_action_t action, double duration)
 189 {
 190   action->max_duration = duration;
 191 }
 192
 193 static void finalize(void)
 194 {
 195   surf_model_exit(surf_network_model);
 196   surf_network_model = NULL;
 197 }
 198
 199
 200
 201 void surf_network_model_init_Constant(const char *filename)
 202 {
 203   xbt_assert(surf_network_model == NULL);
 204   if (surf_network_model)
 205     return;
 206   surf_network_model = surf_model_init();
 207
 208   INFO0("Blah");
 209   surf_network_model->name = "constant time network";
 210   surf_network_model->action_unref = action_unref;
 211   surf_network_model->action_cancel = action_cancel;
 212   surf_network_model->action_recycle = action_recycle;
 213   surf_network_model->get_remains = action_get_remains;
 214
 215   surf_network_model->model_private->resource_used = resource_used;
 216   surf_network_model->model_private->share_resources = share_resources;
 217   surf_network_model->model_private->update_actions_state =
 218     update_actions_state;
 219   surf_network_model->model_private->update_resource_state =
 220     update_resource_state;
 221   surf_network_model->model_private->finalize = finalize;
 222
 223   surf_network_model->suspend = action_suspend;
 224   surf_network_model->resume = action_resume;
 225   surf_network_model->is_suspended = action_is_suspended;
 226   surf_cpu_model->set_max_duration = action_set_max_duration;
 227
 228   surf_network_model->extension.network.communicate = communicate;
 229   surf_network_model->extension.network.get_link_bandwidth =
 230     get_link_bandwidth;
 231   surf_network_model->extension.network.get_link_latency = get_link_latency;
 232   surf_network_model->extension.network.link_shared = link_shared;
 233
 234   if (!random_latency)
 235     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 236   define_callbacks(filename);
 237   xbt_dynar_push(model_list, &surf_network_model);
 238
 239   update_model_description(surf_network_model_description,
 240                            "Constant", surf_network_model);
 241
 242   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 243   routing_model_create(sizeof(double), NULL);
 244 }