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     surf_action_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 =
  59       surf_network_model->states.running_action_set;
  60   double min = -1.0;
  61
  62   xbt_swag_foreach(action, running_actions) {
  63     if (action->latency > 0) {
  64       if (min < 0)
  65         min = action->latency;
  66       else if (action->latency < min)
  67         min = action->latency;
  68     }
  69   }
  70
  71   return min;
  72 }
  73
  74 static void netcste_update_actions_state(double now, double delta)
  75 {
  76   surf_action_network_Constant_t action = NULL;
  77   surf_action_network_Constant_t next_action = NULL;
  78   xbt_swag_t running_actions =
  79       surf_network_model->states.running_action_set;
  80
  81   xbt_swag_foreach_safe(action, next_action, running_actions) {
  82     if (action->latency > 0) {
  83       if (action->latency > delta) {
  84         double_update(&(action->latency), delta);
  85       } else {
  86         action->latency = 0.0;
  87       }
  88     }
  89     double_update(&(action->generic_action.remains),
  90                   action->generic_action.cost * delta / action->lat_init);
  91     if (action->generic_action.max_duration != NO_MAX_DURATION)
  92       double_update(&(action->generic_action.max_duration), delta);
  93
  94     if (action->generic_action.remains <= 0) {
  95       action->generic_action.finish = surf_get_clock();
  96       surf_network_model->action_state_set((surf_action_t) action,
  97                                            SURF_ACTION_DONE);
  98     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
  99                && (action->generic_action.max_duration <= 0)) {
 100       action->generic_action.finish = surf_get_clock();
 101       surf_network_model->action_state_set((surf_action_t) action,
 102                                            SURF_ACTION_DONE);
 103     }
 104   }
 105 }
 106
 107 static void netcste_update_resource_state(void *id,
 108                                           tmgr_trace_event_t event_type,
 109                                           double value, double time)
 110 {
 111   DIE_IMPOSSIBLE;
 112 }
 113
 114 static surf_action_t netcste_communicate(const char *src_name,
 115                                          const char *dst_name, double size,
 116                                          double rate)
 117 {
 118   surf_action_network_Constant_t action = NULL;
 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 = 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 #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 /* returns an array of link_Constant_t */
 150 static xbt_dynar_t netcste_get_route(void *src, void *dst)
 151 {
 152   xbt_die("Calling this function does not make any sense");
 153 }
 154
 155 static double netcste_get_link_bandwidth(const void *link)
 156 {
 157   DIE_IMPOSSIBLE;
 158 }
 159
 160 static double netcste_get_link_latency(const void *link)
 161 {
 162   DIE_IMPOSSIBLE;
 163 }
 164
 165 static int link_shared(const void *link)
 166 {
 167   DIE_IMPOSSIBLE;
 168 }
 169
 170 static void netcste_action_suspend(surf_action_t action)
 171 {
 172   ((surf_action_network_Constant_t) action)->suspended = 1;
 173 }
 174
 175 static void netcste_action_resume(surf_action_t action)
 176 {
 177   if (((surf_action_network_Constant_t) action)->suspended)
 178     ((surf_action_network_Constant_t) action)->suspended = 0;
 179 }
 180
 181 static int netcste_action_is_suspended(surf_action_t action)
 182 {
 183   return ((surf_action_network_Constant_t) action)->suspended;
 184 }
 185
 186 static void netcste_finalize(void)
 187 {
 188   surf_model_exit(surf_network_model);
 189   surf_network_model = NULL;
 190 }
 191
 192
 193
 194 void surf_network_model_init_Constant(const char *filename)
 195 {
 196   xbt_assert(surf_network_model == NULL);
 197   if (surf_network_model)
 198     return;
 199   surf_network_model = surf_model_init();
 200
 201   surf_network_model->name = "constant time network";
 202   surf_network_model->action_unref = netcste_action_unref;
 203   surf_network_model->action_cancel = netcste_action_cancel;
 204   surf_network_model->action_recycle = net_action_recycle;
 205   surf_network_model->get_remains = net_action_get_remains;
 206 #ifdef HAVE_LATENCY_BOUND_TRACKING
 207   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 208 #endif
 209
 210   surf_network_model->model_private->resource_used = netcste_resource_used;
 211   surf_network_model->model_private->share_resources =
 212       netcste_share_resources;
 213   surf_network_model->model_private->update_actions_state =
 214       netcste_update_actions_state;
 215   surf_network_model->model_private->update_resource_state =
 216       netcste_update_resource_state;
 217   surf_network_model->model_private->finalize = netcste_finalize;
 218
 219   surf_network_model->suspend = netcste_action_suspend;
 220   surf_network_model->resume = netcste_action_resume;
 221   surf_network_model->is_suspended = netcste_action_is_suspended;
 222   surf_cpu_model->set_max_duration = net_action_set_max_duration;
 223
 224   surf_network_model->extension.network.communicate = netcste_communicate;
 225   surf_network_model->extension.network.get_link_bandwidth =
 226       netcste_get_link_bandwidth;
 227   surf_network_model->extension.network.get_link_latency =
 228       netcste_get_link_latency;
 229   surf_network_model->extension.network.link_shared = link_shared;
 230 #ifdef HAVE_TRACING
 231   surf_network_model->set_category = netcste_action_set_category;
 232 #endif
 233
 234   if (!random_latency)
 235     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 236   netcste_define_callbacks(filename);
 237   xbt_dynar_push(model_list, &surf_network_model);
 238
 239   update_model_description(surf_network_model_description,
 240                            "Constant", surf_network_model);
 241
 242   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 243   routing_model_create(sizeof(double), NULL, netcste_get_link_latency);
 244 }