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