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(sg_platf_host_cbarg_t h) {
  25   host_number_int++;
  26 }
  27
  28 static void netcste_define_callbacks(void) {
  29   sg_platf_host_add_cb(netcste_count_hosts);
  30 }
  31
  32 static int netcste_resource_used(void *resource_id)
  33 {
  34   return 0;
  35 }
  36
  37 static int netcste_action_unref(surf_action_t action)
  38 {
  39   action->refcount--;
  40   if (!action->refcount) {
  41     xbt_swag_remove(action, action->state_set);
  42     surf_action_free(&action);
  43     return 1;
  44   }
  45   return 0;
  46 }
  47
  48 static void netcste_action_cancel(surf_action_t action)
  49 {
  50   return;
  51 }
  52
  53 static double netcste_share_resources(double now)
  54 {
  55   surf_action_network_Constant_t action = NULL;
  56   xbt_swag_t running_actions =
  57       surf_network_model->states.running_action_set;
  58   double min = -1.0;
  59
  60   xbt_swag_foreach(action, running_actions) {
  61     if (action->latency > 0) {
  62       if (min < 0)
  63         min = action->latency;
  64       else if (action->latency < min)
  65         min = action->latency;
  66     }
  67   }
  68
  69   return min;
  70 }
  71
  72 static void netcste_update_actions_state(double now, double delta)
  73 {
  74   surf_action_network_Constant_t action = NULL;
  75   surf_action_network_Constant_t next_action = NULL;
  76   xbt_swag_t running_actions =
  77       surf_network_model->states.running_action_set;
  78
  79   xbt_swag_foreach_safe(action, next_action, running_actions) {
  80     if (action->latency > 0) {
  81       if (action->latency > delta) {
  82         double_update(&(action->latency), delta);
  83       } else {
  84         action->latency = 0.0;
  85       }
  86     }
  87     double_update(&(action->generic_action.remains),
  88                   action->generic_action.cost * delta / action->lat_init);
  89     if (action->generic_action.max_duration != NO_MAX_DURATION)
  90       double_update(&(action->generic_action.max_duration), delta);
  91
  92     if (action->generic_action.remains <= 0) {
  93       action->generic_action.finish = surf_get_clock();
  94       surf_network_model->action_state_set((surf_action_t) action,
  95                                            SURF_ACTION_DONE);
  96     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
  97                && (action->generic_action.max_duration <= 0)) {
  98       action->generic_action.finish = surf_get_clock();
  99       surf_network_model->action_state_set((surf_action_t) action,
 100                                            SURF_ACTION_DONE);
 101     }
 102   }
 103 }
 104
 105 static void netcste_update_resource_state(void *id,
 106                                           tmgr_trace_event_t event_type,
 107                                           double value, double time)
 108 {
 109   DIE_IMPOSSIBLE;
 110 }
 111
 112 static surf_action_t netcste_communicate(sg_routing_edge_t src,
 113                                          sg_routing_edge_t dst,
 114                                          double size, double rate)
 115 {
 116   surf_action_network_Constant_t action = NULL;
 117
 118   char *src_name = src->name;
 119   char *dst_name = dst->name;
 120
 121   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 122
 123   action =
 124       surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
 125                       surf_network_model, 0);
 126
 127   action->suspended = 0;
 128
 129   action->latency = sg_latency_factor;          //random_generate(random_latency);
 130   action->lat_init = action->latency;
 131
 132   if (action->latency <= 0.0) {
 133     action->generic_action.state_set =
 134         surf_network_model->states.done_action_set;
 135     xbt_swag_insert(action, action->generic_action.state_set);
 136   }
 137
 138   XBT_OUT();
 139
 140   return (surf_action_t) action;
 141 }
 142
 143 #ifdef HAVE_TRACING
 144 static void netcste_action_set_category(surf_action_t action, const char *category)
 145 {
 146   //ignore completely the categories in constant model, they are not traced
 147 }
 148 #endif
 149
 150 static double netcste_get_link_bandwidth(const void *link)
 151 {
 152   DIE_IMPOSSIBLE;
 153   return -1.0; /* useless since DIE actually abort(), but eclipse prefer to have a useless and harmless return */
 154 }
 155
 156 static double netcste_get_link_latency(const void *link)
 157 {
 158   DIE_IMPOSSIBLE;
 159   return -1.0; /* useless since DIE actually abort(), but eclipse prefer to have a useless and harmless return */
 160 }
 161
 162 static int link_shared(const void *link)
 163 {
 164   DIE_IMPOSSIBLE;
 165   return -1; /* useless since DIE actually abort(), but eclipse prefer to have a useless and harmless return */
 166 }
 167
 168 static void netcste_action_suspend(surf_action_t action)
 169 {
 170   ((surf_action_network_Constant_t) action)->suspended = 1;
 171 }
 172
 173 static void netcste_action_resume(surf_action_t action)
 174 {
 175   if (((surf_action_network_Constant_t) action)->suspended)
 176     ((surf_action_network_Constant_t) action)->suspended = 0;
 177 }
 178
 179 static int netcste_action_is_suspended(surf_action_t action)
 180 {
 181   return ((surf_action_network_Constant_t) action)->suspended;
 182 }
 183
 184 static void netcste_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()
 193 {
 194   xbt_assert(surf_network_model == NULL);
 195   if (surf_network_model)
 196     return;
 197   surf_network_model = surf_model_init();
 198
 199   surf_network_model->name = "constant time network";
 200   surf_network_model->action_unref = netcste_action_unref;
 201   surf_network_model->action_cancel = netcste_action_cancel;
 202   surf_network_model->action_recycle = net_action_recycle;
 203   surf_network_model->get_remains = surf_action_get_remains;
 204 #ifdef HAVE_LATENCY_BOUND_TRACKING
 205   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 206 #endif
 207
 208   surf_network_model->model_private->resource_used = netcste_resource_used;
 209   surf_network_model->model_private->share_resources =
 210       netcste_share_resources;
 211   surf_network_model->model_private->update_actions_state =
 212       netcste_update_actions_state;
 213   surf_network_model->model_private->update_resource_state =
 214       netcste_update_resource_state;
 215   surf_network_model->model_private->finalize = netcste_finalize;
 216
 217   surf_network_model->suspend = netcste_action_suspend;
 218   surf_network_model->resume = netcste_action_resume;
 219   surf_network_model->is_suspended = netcste_action_is_suspended;
 220   surf_cpu_model->set_max_duration = surf_action_set_max_duration;
 221
 222   surf_network_model->extension.network.communicate = netcste_communicate;
 223   surf_network_model->extension.network.get_link_bandwidth =
 224       netcste_get_link_bandwidth;
 225   surf_network_model->extension.network.get_link_latency =
 226       netcste_get_link_latency;
 227   surf_network_model->extension.network.link_shared = link_shared;
 228 #ifdef HAVE_TRACING
 229   surf_network_model->set_category = netcste_action_set_category;
 230 #endif
 231
 232   if (!random_latency)
 233     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 234   netcste_define_callbacks();
 235   xbt_dynar_push(model_list, &surf_network_model);
 236
 237   routing_model_create(NULL);
 238 }