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   if (!xbt_swag_size(surf_network_model->states.running_action_set)) {
  56     return -1.0;
  57   }
  58   return sg_latency_factor;
  59 }
  60
  61 static void netcste_update_actions_state(double now, double delta)
  62 {
  63   surf_action_network_Constant_t action = NULL;
  64   surf_action_network_Constant_t next_action = NULL;
  65   xbt_swag_t running_actions =
  66       surf_network_model->states.running_action_set;
  67
  68   xbt_swag_foreach_safe(action, next_action, running_actions) {
  69     if (action->latency > 0) {
  70       if (action->latency > delta) {
  71         double_update(&(action->latency), delta);
  72       } else {
  73         action->latency = 0.0;
  74       }
  75     }
  76     double_update(&(action->generic_action.remains),
  77                   action->generic_action.cost * delta / action->lat_init);
  78     if (action->generic_action.max_duration != NO_MAX_DURATION)
  79       double_update(&(action->generic_action.max_duration), delta);
  80
  81     if (action->generic_action.remains <= 0) {
  82       action->generic_action.finish = surf_get_clock();
  83       surf_network_model->action_state_set((surf_action_t) action,
  84                                            SURF_ACTION_DONE);
  85     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
  86                && (action->generic_action.max_duration <= 0)) {
  87       action->generic_action.finish = surf_get_clock();
  88       surf_network_model->action_state_set((surf_action_t) action,
  89                                            SURF_ACTION_DONE);
  90     }
  91   }
  92 }
  93
  94 static void netcste_update_resource_state(void *id,
  95                                           tmgr_trace_event_t event_type,
  96                                           double value, double time)
  97 {
  98   DIE_IMPOSSIBLE;
  99 }
 100
 101 static surf_action_t netcste_communicate(const char *src_name,
 102                                          const char *dst_name, double size,
 103                                          double rate)
 104 {
 105   surf_action_network_Constant_t action = NULL;
 106
 107   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 108
 109   action =
 110       surf_action_new(sizeof(s_surf_action_network_Constant_t), size,
 111                       surf_network_model, 0);
 112
 113   action->suspended = 0;
 114
 115   action->latency = sg_latency_factor;          //random_generate(random_latency);
 116   action->lat_init = action->latency;
 117
 118   if (action->latency <= 0.0) {
 119     action->generic_action.state_set =
 120         surf_network_model->states.done_action_set;
 121     xbt_swag_insert(action, action->generic_action.state_set);
 122   }
 123
 124   XBT_OUT();
 125
 126   return (surf_action_t) action;
 127 }
 128
 129 #ifdef HAVE_TRACING
 130 static void netcste_action_set_category(surf_action_t action, const char *category)
 131 {
 132   //ignore completely the categories in constant model, they are not traced
 133 }
 134 #endif
 135
 136 static double netcste_get_link_bandwidth(const void *link)
 137 {
 138   DIE_IMPOSSIBLE;
 139 }
 140
 141 static double netcste_get_link_latency(const void *link)
 142 {
 143   DIE_IMPOSSIBLE;
 144 }
 145
 146 static int link_shared(const void *link)
 147 {
 148   DIE_IMPOSSIBLE;
 149 }
 150
 151 static void netcste_action_suspend(surf_action_t action)
 152 {
 153   ((surf_action_network_Constant_t) action)->suspended = 1;
 154 }
 155
 156 static void netcste_action_resume(surf_action_t action)
 157 {
 158   if (((surf_action_network_Constant_t) action)->suspended)
 159     ((surf_action_network_Constant_t) action)->suspended = 0;
 160 }
 161
 162 static int netcste_action_is_suspended(surf_action_t action)
 163 {
 164   return ((surf_action_network_Constant_t) action)->suspended;
 165 }
 166
 167 static void netcste_finalize(void)
 168 {
 169   surf_model_exit(surf_network_model);
 170   surf_network_model = NULL;
 171 }
 172
 173
 174
 175 void surf_network_model_init_Constant()
 176 {
 177   xbt_assert(surf_network_model == NULL);
 178   if (surf_network_model)
 179     return;
 180   surf_network_model = surf_model_init();
 181
 182   surf_network_model->name = "constant time network";
 183   surf_network_model->action_unref = netcste_action_unref;
 184   surf_network_model->action_cancel = netcste_action_cancel;
 185   surf_network_model->action_recycle = net_action_recycle;
 186   surf_network_model->get_remains = net_action_get_remains;
 187 #ifdef HAVE_LATENCY_BOUND_TRACKING
 188   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 189 #endif
 190
 191   surf_network_model->model_private->resource_used = netcste_resource_used;
 192   surf_network_model->model_private->share_resources =
 193       netcste_share_resources;
 194   surf_network_model->model_private->update_actions_state =
 195       netcste_update_actions_state;
 196   surf_network_model->model_private->update_resource_state =
 197       netcste_update_resource_state;
 198   surf_network_model->model_private->finalize = netcste_finalize;
 199
 200   surf_network_model->suspend = netcste_action_suspend;
 201   surf_network_model->resume = netcste_action_resume;
 202   surf_network_model->is_suspended = netcste_action_is_suspended;
 203   surf_cpu_model->set_max_duration = net_action_set_max_duration;
 204
 205   surf_network_model->extension.network.communicate = netcste_communicate;
 206   surf_network_model->extension.network.get_link_bandwidth =
 207       netcste_get_link_bandwidth;
 208   surf_network_model->extension.network.get_link_latency =
 209       netcste_get_link_latency;
 210   surf_network_model->extension.network.link_shared = link_shared;
 211 #ifdef HAVE_TRACING
 212   surf_network_model->set_category = netcste_action_set_category;
 213 #endif
 214
 215   if (!random_latency)
 216     random_latency = random_new(RAND, 100, 0.0, 1.0, .125, .034);
 217   netcste_define_callbacks();
 218   xbt_dynar_push(model_list, &surf_network_model);
 219
 220   xbt_cfg_set_string(_surf_cfg_set, "routing", "none");
 221   routing_model_create(sizeof(double), NULL);
 222 }