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