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 double netcste_share_resources(double now)
  56 {
  57   surf_action_network_Constant_t action = NULL;
  58   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
  59   double min = -1.0;
  60
  61   xbt_swag_foreach(action, running_actions) {
  62     if (action->latency > 0) {
  63       if (min < 0)
  64         min = action->latency;
  65       else if (action->latency < min)
  66         min = action->latency;
  67     }
  68   }
  69
  70   return min;
  71 }
  72
  73 static void netcste_update_actions_state(double now, double delta)
  74 {
  75   surf_action_network_Constant_t action = NULL;
  76   surf_action_network_Constant_t next_action = NULL;
  77   xbt_swag_t running_actions = 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(const char *src_name, const char *dst_name,
 113                                  int src, int dst, double size, double rate)
 114 {
 115   surf_action_network_Constant_t action = NULL;
 116
 117   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 118
 119   action =
 120     surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
 121                     surf_network_model, 0);
 122
 123   action->suspended = 0;
 124
 125   action->latency = 1;          //random_generate(random_latency);
 126   action->lat_init = action->latency;
 127
 128   if (action->latency <= 0.0) {
 129     action->generic_action.state_set =
 130       surf_network_model->states.done_action_set;
 131     xbt_swag_insert(action, action->generic_action.state_set);
 132   }
 133
 134   XBT_OUT;
 135
 136   return (surf_action_t) action;
 137 }
 138
 139 /* returns an array of link_Constant_t */
 140 static xbt_dynar_t netcste_get_route(void *src, void *dst)
 141 {
 142   xbt_die("Calling this function does not make any sense");
 143 }
 144
 145 static double netcste_get_link_bandwidth(const void *link)
 146 {
 147   DIE_IMPOSSIBLE;
 148 }
 149
 150 static double netcste_get_link_latency(const void *link)
 151 {
 152   DIE_IMPOSSIBLE;
 153 }
 154
 155 static int link_shared(const void *link)
 156 {
 157   DIE_IMPOSSIBLE;
 158 }
 159
 160 static void netcste_action_suspend(surf_action_t action)
 161 {
 162   ((surf_action_network_Constant_t) action)->suspended = 1;
 163 }
 164
 165 static void netcste_action_resume(surf_action_t action)
 166 {
 167   if (((surf_action_network_Constant_t) action)->suspended)
 168     ((surf_action_network_Constant_t) action)->suspended = 0;
 169 }
 170
 171 static int netcste_action_is_suspended(surf_action_t action)
 172 {
 173   return ((surf_action_network_Constant_t) action)->suspended;
 174 }
 175
 176 static void netcste_finalize(void)
 177 {
 178   surf_model_exit(surf_network_model);
 179   surf_network_model = NULL;
 180 }
 181
 182
 183
 184 void surf_network_model_init_Constant(const char *filename)
 185 {
 186   xbt_assert(surf_network_model == NULL);
 187   if (surf_network_model)
 188     return;
 189   surf_network_model = surf_model_init();
 190
 191   INFO0("Blah");
 192   surf_network_model->name = "constant time network";
 193   surf_network_model->action_unref = netcste_action_unref;
 194   surf_network_model->action_cancel = netcste_action_cancel;
 195   surf_network_model->action_recycle = net_action_recycle;
 196   surf_network_model->get_remains = net_action_get_remains;
 197   surf_network_model->get_latency_limited = net_get_link_latency;
 198
 199   surf_network_model->model_private->resource_used = netcste_resource_used;
 200   surf_network_model->model_private->share_resources = netcste_share_resources;
 201   surf_network_model->model_private->update_actions_state =
 202     netcste_update_actions_state;
 203   surf_network_model->model_private->update_resource_state =
 204     netcste_update_resource_state;
 205   surf_network_model->model_private->finalize = netcste_finalize;
 206
 207   surf_network_model->suspend = netcste_action_suspend;
 208   surf_network_model->resume = netcste_action_resume;
 209   surf_network_model->is_suspended = netcste_action_is_suspended;
 210   surf_cpu_model->set_max_duration = net_action_set_max_duration;
 211
 212   surf_network_model->extension.network.communicate = netcste_communicate;
 213   surf_network_model->extension.network.get_link_bandwidth =
 214     netcste_get_link_bandwidth;
 215   surf_network_model->extension.network.get_link_latency = netcste_get_link_latency;
 216   surf_network_model->extension.network.link_shared = link_shared;
 217
 218   if (!random_latency)
 219     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 220   netcste_define_callbacks(filename);
 221   xbt_dynar_push(model_list, &surf_network_model);
 222
 223   update_model_description(surf_network_model_description,
 224                            "Constant", surf_network_model);
 225
 226   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 227   routing_model_create(sizeof(double), NULL);
 228 }