src/surf/network_constant.c

   1 /* Copyright (c) 2008, 2009, 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_Constant {
  14   s_surf_action_t generic_action;
  15   double latency;
  16   double lat_init;
  17   int suspended;
  18 } s_surf_action_network_Constant_t, *surf_action_network_Constant_t;
  19
  20 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  21 static random_data_t random_latency = NULL;
  22 static int host_number_int = 0;
  23
  24 static void netcste_count_hosts(void)
  25 {
  26   host_number_int++;
  27 }
  28
  29 static void netcste_define_callbacks(const char *file)
  30 {
  31   surfxml_add_callback(STag_surfxml_host_cb_list, &netcste_count_hosts);
  32 }
  33
  34 static int netcste_resource_used(void *resource_id)
  35 {
  36   return 0;
  37 }
  38
  39 static int netcste_action_unref(surf_action_t action)
  40 {
  41   action->refcount--;
  42   if (!action->refcount) {
  43     xbt_swag_remove(action, action->state_set);
  44     free(action);
  45     return 1;
  46   }
  47   return 0;
  48 }
  49
  50 static void netcste_action_cancel(surf_action_t action)
  51 {
  52   return;
  53 }
  54
  55 static void netcste_action_recycle(surf_action_t action)
  56 {
  57   return;
  58 }
  59
  60 static double netcste_action_get_remains(surf_action_t action)
  61 {
  62   return action->remains;
  63 }
  64
  65 static double netcste_share_resources(double now)
  66 {
  67   surf_action_network_Constant_t action = NULL;
  68   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  69   double min = -1.0;
  70
  71   xbt_swag_foreach(action, running_actions) {
  72     if (action->latency > 0) {
  73       if (min < 0)
  74         min = action->latency;
  75       else if (action->latency < min)
  76         min = action->latency;
  77     }
  78   }
  79
  80   return min;
  81 }
  82
  83 static void netcste_update_actions_state(double now, double delta)
  84 {
  85   surf_action_network_Constant_t action = NULL;
  86   surf_action_network_Constant_t next_action = NULL;
  87   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  88
  89   xbt_swag_foreach_safe(action, next_action, running_actions) {
  90     if (action->latency > 0) {
  91       if (action->latency > delta) {
  92         double_update(&(action->latency), delta);
  93       } else {
  94         action->latency = 0.0;
  95       }
  96     }
  97     double_update(&(action->generic_action.remains),
  98                   action->generic_action.cost * delta / action->lat_init);
  99     if (action->generic_action.max_duration != NO_MAX_DURATION)
 100       double_update(&(action->generic_action.max_duration), delta);
 101
 102     if (action->generic_action.remains <= 0) {
 103       action->generic_action.finish = surf_get_clock();
 104       surf_network_model->action_state_set((surf_action_t) action,
 105                                            SURF_ACTION_DONE);
 106     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 107                && (action->generic_action.max_duration <= 0)) {
 108       action->generic_action.finish = surf_get_clock();
 109       surf_network_model->action_state_set((surf_action_t) action,
 110                                            SURF_ACTION_DONE);
 111     }
 112   }
 113 }
 114
 115 static void netcste_update_resource_state(void *id,
 116                                   tmgr_trace_event_t event_type,
 117                                   double value, double time)
 118 {
 119   DIE_IMPOSSIBLE;
 120 }
 121
 122 static surf_action_t netcste_communicate(const char *src_name, const char *dst_name,
 123                                  int src, int dst, double size, double rate)
 124 {
 125   surf_action_network_Constant_t action = NULL;
 126
 127   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 128
 129   action =
 130     surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
 131                     surf_network_model, 0);
 132
 133   action->suspended = 0;
 134
 135   action->latency = 1;          //random_generate(random_latency);
 136   action->lat_init = action->latency;
 137
 138   if (action->latency <= 0.0) {
 139     action->generic_action.state_set =
 140       surf_network_model->states.done_action_set;
 141     xbt_swag_insert(action, action->generic_action.state_set);
 142   }
 143
 144   XBT_OUT;
 145
 146   return (surf_action_t) action;
 147 }
 148
 149 /* returns an array of link_Constant_t */
 150 static xbt_dynar_t netcste_get_route(void *src, void *dst)
 151 {
 152   xbt_die("Calling this function does not make any sense");
 153 }
 154
 155 static double netcste_get_link_bandwidth(const void *link)
 156 {
 157   DIE_IMPOSSIBLE;
 158 }
 159
 160 static double netcste_get_link_latency(const void *link)
 161 {
 162   DIE_IMPOSSIBLE;
 163 }
 164
 165 static int link_shared(const void *link)
 166 {
 167   DIE_IMPOSSIBLE;
 168 }
 169
 170 static void netcste_action_suspend(surf_action_t action)
 171 {
 172   ((surf_action_network_Constant_t) action)->suspended = 1;
 173 }
 174
 175 static void netcste_action_resume(surf_action_t action)
 176 {
 177   if (((surf_action_network_Constant_t) action)->suspended)
 178     ((surf_action_network_Constant_t) action)->suspended = 0;
 179 }
 180
 181 static int netcste_action_is_suspended(surf_action_t action)
 182 {
 183   return ((surf_action_network_Constant_t) action)->suspended;
 184 }
 185
 186 static void netcste_action_set_max_duration(surf_action_t action, double duration)
 187 {
 188   action->max_duration = duration;
 189 }
 190
 191 static void netcste_finalize(void)
 192 {
 193   surf_model_exit(surf_network_model);
 194   surf_network_model = NULL;
 195 }
 196
 197
 198
 199 void surf_network_model_init_Constant(const char *filename)
 200 {
 201   xbt_assert(surf_network_model == NULL);
 202   if (surf_network_model)
 203     return;
 204   surf_network_model = surf_model_init();
 205
 206   INFO0("Blah");
 207   surf_network_model->name = "constant time network";
 208   surf_network_model->action_unref = netcste_action_unref;
 209   surf_network_model->action_cancel = netcste_action_cancel;
 210   surf_network_model->action_recycle = netcste_action_recycle;
 211   surf_network_model->get_remains = netcste_action_get_remains;
 212
 213   surf_network_model->model_private->resource_used = netcste_resource_used;
 214   surf_network_model->model_private->share_resources = netcste_share_resources;
 215   surf_network_model->model_private->update_actions_state =
 216     netcste_update_actions_state;
 217   surf_network_model->model_private->update_resource_state =
 218     netcste_update_resource_state;
 219   surf_network_model->model_private->finalize = netcste_finalize;
 220
 221   surf_network_model->suspend = netcste_action_suspend;
 222   surf_network_model->resume = netcste_action_resume;
 223   surf_network_model->is_suspended = netcste_action_is_suspended;
 224   surf_cpu_model->set_max_duration = netcste_action_set_max_duration;
 225
 226   surf_network_model->extension.network.communicate = netcste_communicate;
 227   surf_network_model->extension.network.get_link_bandwidth =
 228     netcste_get_link_bandwidth;
 229   surf_network_model->extension.network.get_link_latency = netcste_get_link_latency;
 230   surf_network_model->extension.network.link_shared = link_shared;
 231
 232   if (!random_latency)
 233     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 234   netcste_define_callbacks(filename);
 235   xbt_dynar_push(model_list, &surf_network_model);
 236
 237   update_model_description(surf_network_model_description,
 238                            "Constant", surf_network_model);
 239
 240   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 241   routing_model_create(sizeof(double), NULL);
 242 }