src/surf/network_constant.c

   1 /* Copyright (c) 2008-2013. 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 int host_number_int = 0;
  22
  23 static void netcste_count_hosts(sg_platf_host_cbarg_t h) {
  24   host_number_int++;
  25 }
  26
  27 static void netcste_define_callbacks(void) {
  28   sg_platf_host_add_cb(netcste_count_hosts);
  29 }
  30
  31 static int netcste_resource_used(void *resource_id)
  32 {
  33   return 0;
  34 }
  35
  36 static int netcste_action_unref(surf_action_t action)
  37 {
  38   action->refcount--;
  39   if (!action->refcount) {
  40     xbt_swag_remove(action, action->state_set);
  41     surf_action_free(&action);
  42     return 1;
  43   }
  44   return 0;
  45 }
  46
  47 static void netcste_action_cancel(surf_action_t action)
  48 {
  49   return;
  50 }
  51
  52 static double netcste_share_resources(double now)
  53 {
  54   surf_action_network_Constant_t action = NULL;
  55   xbt_swag_t running_actions =
  56       surf_network_model->states.running_action_set;
  57   double min = -1.0;
  58
  59   xbt_swag_foreach(action, running_actions) {
  60     if (action->latency > 0) {
  61       if (min < 0)
  62         min = action->latency;
  63       else if (action->latency < min)
  64         min = action->latency;
  65     }
  66   }
  67
  68   return min;
  69 }
  70
  71 static void netcste_update_actions_state(double now, double delta)
  72 {
  73   surf_action_network_Constant_t action = NULL;
  74   surf_action_network_Constant_t next_action = NULL;
  75   xbt_swag_t running_actions =
  76       surf_network_model->states.running_action_set;
  77
  78   xbt_swag_foreach_safe(action, next_action, running_actions) {
  79     if (action->latency > 0) {
  80       if (action->latency > delta) {
  81         double_update(&(action->latency), delta);
  82       } else {
  83         action->latency = 0.0;
  84       }
  85     }
  86     double_update(&(action->generic_action.remains),
  87                   action->generic_action.cost * delta / action->lat_init);
  88     if (action->generic_action.max_duration != NO_MAX_DURATION)
  89       double_update(&(action->generic_action.max_duration), delta);
  90
  91     if (action->generic_action.remains <= 0) {
  92       action->generic_action.finish = surf_get_clock();
  93       surf_network_model->action_state_set((surf_action_t) action,
  94                                            SURF_ACTION_DONE);
  95     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
  96                && (action->generic_action.max_duration <= 0)) {
  97       action->generic_action.finish = surf_get_clock();
  98       surf_network_model->action_state_set((surf_action_t) action,
  99                                            SURF_ACTION_DONE);
 100     }
 101   }
 102 }
 103
 104 static void netcste_update_resource_state(void *id,
 105                                           tmgr_trace_event_t event_type,
 106                                           double value, double time)
 107 {
 108   DIE_IMPOSSIBLE;
 109 }
 110
 111 static surf_action_t netcste_communicate(sg_routing_edge_t src,
 112                                          sg_routing_edge_t dst,
 113                                          double size, double rate)
 114 {
 115   surf_action_network_Constant_t action = NULL;
 116
 117   char *src_name = src->name;
 118   char *dst_name = dst->name;
 119
 120   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 121
 122   action =
 123       surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
 124                       surf_network_model, 0);
 125
 126   action->suspended = 0;
 127
 128   action->latency = sg_latency_factor;
 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 #ifdef HAVE_TRACING
 143 static void netcste_action_set_category(surf_action_t action, const char *category)
 144 {
 145   //ignore completely the categories in constant model, they are not traced
 146 }
 147 #endif
 148
 149 static double netcste_get_link_bandwidth(const void *link)
 150 {
 151   DIE_IMPOSSIBLE;
 152   return -1.0; /* useless since DIE actually abort(), but eclipse prefer to have a useless and harmless return */
 153 }
 154
 155 static double netcste_get_link_latency(const void *link)
 156 {
 157   DIE_IMPOSSIBLE;
 158   return -1.0; /* useless since DIE actually abort(), but eclipse prefer to have a useless and harmless return */
 159 }
 160
 161 static int link_shared(const void *link)
 162 {
 163   DIE_IMPOSSIBLE;
 164   return -1; /* useless since DIE actually abort(), but eclipse prefer to have a useless and harmless return */
 165 }
 166
 167 static void netcste_action_suspend(surf_action_t action)
 168 {
 169   ((surf_action_network_Constant_t) action)->suspended = 1;
 170 }
 171
 172 static void netcste_action_resume(surf_action_t action)
 173 {
 174   if (((surf_action_network_Constant_t) action)->suspended)
 175     ((surf_action_network_Constant_t) action)->suspended = 0;
 176 }
 177
 178 static int netcste_action_is_suspended(surf_action_t action)
 179 {
 180   return ((surf_action_network_Constant_t) action)->suspended;
 181 }
 182
 183 static void netcste_finalize(void)
 184 {
 185   surf_model_exit(surf_network_model);
 186   surf_network_model = NULL;
 187 }
 188
 189
 190
 191 void surf_network_model_init_Constant()
 192 {
 193   xbt_assert(surf_network_model == NULL);
 194   if (surf_network_model)
 195     return;
 196   surf_network_model = surf_model_init();
 197
 198   surf_network_model->name = "constant time network";
 199   surf_network_model->action_unref = netcste_action_unref;
 200   surf_network_model->action_cancel = netcste_action_cancel;
 201   surf_network_model->action_recycle = net_action_recycle;
 202   surf_network_model->get_remains = surf_action_get_remains;
 203 #ifdef HAVE_LATENCY_BOUND_TRACKING
 204   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 205 #endif
 206
 207   surf_network_model->model_private->resource_used = netcste_resource_used;
 208   surf_network_model->model_private->share_resources =
 209       netcste_share_resources;
 210   surf_network_model->model_private->update_actions_state =
 211       netcste_update_actions_state;
 212   surf_network_model->model_private->update_resource_state =
 213       netcste_update_resource_state;
 214   surf_network_model->model_private->finalize = netcste_finalize;
 215
 216   surf_network_model->suspend = netcste_action_suspend;
 217   surf_network_model->resume = netcste_action_resume;
 218   surf_network_model->is_suspended = netcste_action_is_suspended;
 219   surf_cpu_model->set_max_duration = surf_action_set_max_duration;
 220
 221   surf_network_model->extension.network.communicate = netcste_communicate;
 222   surf_network_model->extension.network.get_link_bandwidth =
 223       netcste_get_link_bandwidth;
 224   surf_network_model->extension.network.get_link_latency =
 225       netcste_get_link_latency;
 226   surf_network_model->extension.network.link_shared = link_shared;
 227 #ifdef HAVE_TRACING
 228   surf_network_model->set_category = netcste_action_set_category;
 229 #endif
 230
 231   netcste_define_callbacks();
 232   xbt_dynar_push(model_list, &surf_network_model);
 233
 234   routing_model_create(NULL);
 235 }