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[trace] removing obsolete code (host and link declaration is in instr_routing.c)
[simgrid.git] / src / surf / network.c
index 384734d..cfa1139 100644 (file)
@@ -1,6 +1,5 @@
-/*     $Id$     */
-
-/* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
+/* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
+ * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -16,40 +15,173 @@ surf_model_t surf_network_model = NULL;
 static lmm_system_t network_maxmin_system = NULL;
 static void (*network_solve) (lmm_system_t) = NULL;
 
-double latency_factor = 1.0;    /* default value */
-double bandwidth_factor = 1.0;  /* default value */
-double weight_S_parameter = 0.0;        /* default value */
+double sg_sender_gap = 0.0;
+double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
+double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
+double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
 
 double sg_tcp_gamma = 0.0;
+int sg_network_fullduplex = 0;
+
+xbt_dict_t gap_lookup = NULL;
+
+static double net_get_link_bandwidth(const void *link);
+
+static void gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
+   const char* src = link->lmm_resource.generic_resource.name;
+   xbt_fifo_t fifo;
+   surf_action_network_CM02_t last_action;
+   double bw;
+
+   if(sg_sender_gap > 0.0) {
+      if(!gap_lookup) {
+         gap_lookup = xbt_dict_new();
+      }
+      fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
+      action->sender.gap = 0.0;
+      if(fifo && xbt_fifo_size(fifo) > 0) {
+         /* Compute gap from last send */
+         last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
+         bw = net_get_link_bandwidth(link);
+         action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
+         action->latency += action->sender.gap;
+      }
+      /* Append action as last send */
+      action->sender.link_name = link->lmm_resource.generic_resource.name;
+      fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
+      if(!fifo) {
+         fifo = xbt_fifo_new();
+         xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
+      }
+      action->sender.fifo_item = xbt_fifo_push(fifo, action);
+      action->sender.size = size;
+   }
+}
+
+static void gap_unknown(surf_action_network_CM02_t action) {
+   action->sender.gap = 0.0;
+   action->sender.link_name = NULL;
+   action->sender.fifo_item = NULL;
+   action->sender.size = 0.0;
+}
+
+static void gap_remove(surf_action_network_CM02_t action) {
+   xbt_fifo_t fifo;
+   size_t size;
+
+   if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
+      fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
+      xbt_fifo_remove_item(fifo, action->sender.fifo_item);
+      size = xbt_fifo_size(fifo);
+      if(size == 0) {
+         xbt_fifo_free(fifo);
+         xbt_dict_remove(gap_lookup, action->sender.link_name);
+         size = xbt_dict_size(gap_lookup);
+         if(size == 0) {
+            xbt_dict_free(&gap_lookup);
+         }
+      }
+   }
+}
+
+/******************************************************************************/
+/*                           Factors callbacks                                */
+/******************************************************************************/
+static double constant_latency_factor(double size)
+{
+  return sg_latency_factor;
+}
+
+static double constant_bandwidth_factor(double size)
+{
+  return sg_bandwidth_factor;
+}
+
+static double constant_bandwidth_constraint(double rate, double bound,
+                                            double size)
+{
+  return rate;
+}
+
+/**********************/
+/*   SMPI callbacks   */
+/**********************/
+static double smpi_latency_factor(double size)
+{
+  /* 1 B <= size <= 1 KiB */
+  if (size <= 1024.0) {
+    return 1.0056;
+  }
+
+  /* 2 KiB <= size <= 32 KiB */
+  if (size <= 32768.0) {
+    return 1.8805;
+  }
+
+  /* 64 KiB <= size <= 4 MiB */
+  return 22.7111;
+}
+
+static double smpi_bandwidth_factor(double size)
+{
+  /* 1 B <= size <= 1 KiB */
+  if (size <= 1024.0) {
+    return 0.2758;
+  }
+
+  /* 2 KiB <= size <= 32 KiB */
+  if (size <= 32768.0) {
+    return 0.5477;
+  }
+
+  /* 64 KiB <= size <= 4 MiB */
+  return 0.9359;
+}
+
+static double smpi_bandwidth_constraint(double rate, double bound,
+                                        double size)
+{
+  return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
+}
+
+
+static double (*latency_factor_callback) (double) =
+    &constant_latency_factor;
+static double (*bandwidth_factor_callback) (double) =
+    &constant_bandwidth_factor;
+static double (*bandwidth_constraint_callback) (double, double, double) =
+    &constant_bandwidth_constraint;
 
 
 static link_CM02_t net_link_new(char *name,
-                            double bw_initial,
-                            tmgr_trace_t bw_trace,
-                            double lat_initial,
-                            tmgr_trace_t lat_trace,
-                            e_surf_resource_state_t
-                            state_initial,
-                            tmgr_trace_t state_trace,
-                            e_surf_link_sharing_policy_t
-                            policy, xbt_dict_t properties)
+                                double bw_initial,
+                                tmgr_trace_t bw_trace,
+                                double lat_initial,
+                                tmgr_trace_t lat_trace,
+                                e_surf_resource_state_t
+                                state_initial,
+                                tmgr_trace_t state_trace,
+                                e_surf_link_sharing_policy_t
+                                policy, xbt_dict_t properties)
 {
   link_CM02_t nw_link = (link_CM02_t)
-    surf_resource_lmm_new(sizeof(s_link_CM02_t),
-                          surf_network_model, name, properties,
-                          network_maxmin_system,
-                          bandwidth_factor * bw_initial,
-                          history,
-                          state_initial, state_trace,
-                          bw_initial, bw_trace);
-
-  xbt_assert1(!xbt_dict_get_or_null(surf_network_model->resource_set, name),
-              "Link '%s' declared several times in the platform file.", name);
+      surf_resource_lmm_new(sizeof(s_link_CM02_t),
+                            surf_network_model, name, properties,
+                            network_maxmin_system,
+                            sg_bandwidth_factor * bw_initial,
+                            history,
+                            state_initial, state_trace,
+                            bw_initial, bw_trace);
+
+  xbt_assert1(!xbt_dict_get_or_null
+              (surf_network_model->resource_set, name),
+              "Link '%s' declared several times in the platform file.",
+              name);
 
   nw_link->lat_current = lat_initial;
   if (lat_trace)
     nw_link->lat_event =
-      tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
+        tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 
   if (policy == SURF_LINK_FATPIPE)
     lmm_constraint_shared(nw_link->lmm_resource.constraint);
@@ -70,7 +202,7 @@ static void net_parse_link_init(void)
   e_surf_resource_state_t state_initial_link = SURF_RESOURCE_ON;
   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
   tmgr_trace_t state_trace;
-
+  DEBUG0("link_CM02");
   name_link = xbt_strdup(A_surfxml_link_id);
   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
@@ -87,18 +219,50 @@ static void net_parse_link_init(void)
 
   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
     policy_initial_link = SURF_LINK_SHARED;
-  else if (A_surfxml_link_sharing_policy ==
-           A_surfxml_link_sharing_policy_FATPIPE)
-    policy_initial_link = SURF_LINK_FATPIPE;
+  else
+         {
+         if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FATPIPE)
+                 policy_initial_link = SURF_LINK_FATPIPE;
+         else if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_FULLDUPLEX)
+                 policy_initial_link = SURF_LINK_FULLDUPLEX;
+         }
 
   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
 
-  net_link_new(name_link, bw_initial, bw_trace,
-           lat_initial, lat_trace, state_initial_link, state_trace,
-           policy_initial_link, xbt_dict_new());
+  if(policy_initial_link == SURF_LINK_FULLDUPLEX)
+  {
+         net_link_new(bprintf("%s_UP",name_link), bw_initial, bw_trace,
+                      lat_initial, lat_trace, state_initial_link, state_trace,
+                      policy_initial_link, xbt_dict_new());
+         net_link_new(bprintf("%s_DOWN",name_link), bw_initial, bw_trace,
+                      lat_initial, lat_trace, state_initial_link, state_trace,
+                      policy_initial_link, xbt_dict_new());
+  }
+  else
+  {
+         net_link_new(name_link, bw_initial, bw_trace,
+                      lat_initial, lat_trace, state_initial_link, state_trace,
+                      policy_initial_link, xbt_dict_new());
+  }
 
 }
 
+static void net_create_resource(char *name,
+                                double bw_initial,
+                                tmgr_trace_t bw_trace,
+                                double lat_initial,
+                                tmgr_trace_t lat_trace,
+                                e_surf_resource_state_t
+                                state_initial,
+                                tmgr_trace_t state_trace,
+                                e_surf_link_sharing_policy_t policy,
+                                xbt_dict_t properties)
+{
+  net_link_new(name, bw_initial, bw_trace,
+               lat_initial, lat_trace, state_initial, state_trace,
+               policy, xbt_dict_new());
+}
+
 static void net_add_traces(void)
 {
   xbt_dict_cursor_t cursor = NULL;
@@ -113,39 +277,42 @@ static void net_add_traces(void)
   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
     link_CM02_t link =
-      xbt_dict_get_or_null(surf_network_model->resource_set, elm);
+        xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 
     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
                 trace_name, elm);
-    xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
+    xbt_assert2(trace,
+                "Cannot connect trace %s to link %s: trace undefined",
                 trace_name, elm);
 
     link->lmm_resource.state_event =
-      tmgr_history_add_trace(history, trace, 0.0, 0, link);
+        tmgr_history_add_trace(history, trace, 0.0, 0, link);
   }
 
   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
     link_CM02_t link =
-      xbt_dict_get_or_null(surf_network_model->resource_set, elm);
+        xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 
     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
                 trace_name, elm);
-    xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
+    xbt_assert2(trace,
+                "Cannot connect trace %s to link %s: trace undefined",
                 trace_name, elm);
 
     link->lmm_resource.power.event =
-      tmgr_history_add_trace(history, trace, 0.0, 0, link);
+        tmgr_history_add_trace(history, trace, 0.0, 0, link);
   }
 
   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
     link_CM02_t link =
-      xbt_dict_get_or_null(surf_network_model->resource_set, elm);
+        xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 
     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
                 trace_name, elm);
-    xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
+    xbt_assert2(trace,
+                "Cannot connect trace %s to link %s: trace undefined",
                 trace_name, elm);
 
     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
@@ -162,7 +329,8 @@ static void net_define_callbacks(const char *file)
 static int net_resource_used(void *resource_id)
 {
   return lmm_constraint_used(network_maxmin_system,
-                             ((surf_resource_lmm_t) resource_id)->constraint);
+                             ((surf_resource_lmm_t)
+                              resource_id)->constraint);
 }
 
 static int net_action_unref(surf_action_t action)
@@ -173,6 +341,12 @@ static int net_action_unref(surf_action_t action)
     if (((surf_action_network_CM02_t) action)->variable)
       lmm_variable_free(network_maxmin_system,
                         ((surf_action_network_CM02_t) action)->variable);
+#ifdef HAVE_TRACING
+    xbt_free(((surf_action_network_CM02_t) action)->src_name);
+    xbt_free(((surf_action_network_CM02_t) action)->dst_name);
+    if (action->category)
+      xbt_free(action->category);
+#endif
     free(action);
     return 1;
   }
@@ -181,15 +355,22 @@ static int net_action_unref(surf_action_t action)
 
 static void net_action_cancel(surf_action_t action)
 {
-  return;
+  surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 }
 
-static void net_action_recycle(surf_action_t action)
+void net_action_recycle(surf_action_t action)
 {
   return;
 }
 
-static double net_action_get_remains(surf_action_t action)
+#ifdef HAVE_LATENCY_BOUND_TRACKING
+int net_get_link_latency_limited(surf_action_t action)
+{
+  return action->latency_limited;
+}
+#endif
+
+double net_action_get_remains(surf_action_t action)
 {
   return action->remains;
 }
@@ -198,17 +379,26 @@ static double net_share_resources(double now)
 {
   s_surf_action_network_CM02_t s_action;
   surf_action_network_CM02_t action = NULL;
-  xbt_swag_t running_actions = surf_network_model->states.running_action_set;
+  xbt_swag_t running_actions =
+      surf_network_model->states.running_action_set;
   double min;
 
   min = generic_maxmin_share_resources(running_actions,
                                        xbt_swag_offset(s_action,
                                                        variable),
-                                       network_maxmin_system, network_solve);
+                                       network_maxmin_system,
+                                       network_solve);
 
 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 
   xbt_swag_foreach(action, running_actions) {
+#ifdef HAVE_LATENCY_BOUND_TRACKING
+    if (lmm_is_variable_limited_by_latency(action->variable)) {
+      (action->generic_action).latency_limited = 1;
+    } else {
+      (action->generic_action).latency_limited = 0;
+    }
+#endif
     if (action->latency > 0) {
       if (min < 0)
         min = action->latency;
@@ -225,7 +415,8 @@ static void net_update_actions_state(double now, double delta)
   double deltap = 0.0;
   surf_action_network_CM02_t action = NULL;
   surf_action_network_CM02_t next_action = NULL;
-  xbt_swag_t running_actions = surf_network_model->states.running_action_set;
+  xbt_swag_t running_actions =
+      surf_network_model->states.running_action_set;
   /*
      xbt_swag_t failed_actions =
      surf_network_model->states.failed_action_set;
@@ -245,6 +436,28 @@ static void net_update_actions_state(double now, double delta)
         lmm_update_variable_weight(network_maxmin_system, action->variable,
                                    action->weight);
     }
+#ifdef HAVE_TRACING
+    xbt_dynar_t route =
+        global_routing->get_route(action->src_name, action->dst_name);
+    link_CM02_t link;
+    unsigned int i;
+    xbt_dynar_foreach(route, i, link) {
+      TRACE_surf_link_set_utilization(link,
+                                      action->generic_action.data,
+                                      (surf_action_t) action,
+                                      lmm_variable_getvalue
+                                      (action->variable), now - delta,
+                                      delta);
+    }
+#endif
+    if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
+                               /* There is actually no link used, hence an infinite bandwidth.
+                                * This happens often when using models like vivaldi.
+                                * In such case, just make sure that the action completes immediately.
+                                */
+       double_update(&(action->generic_action.remains),
+                       action->generic_action.remains);
+    }
     double_update(&(action->generic_action.remains),
                   lmm_variable_getvalue(action->variable) * deltap);
     if (action->generic_action.max_duration != NO_MAX_DURATION)
@@ -255,11 +468,13 @@ static void net_update_actions_state(double now, double delta)
       action->generic_action.finish = surf_get_clock();
       surf_network_model->action_state_set((surf_action_t) action,
                                            SURF_ACTION_DONE);
+      gap_remove(action);
     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
                && (action->generic_action.max_duration <= 0)) {
       action->generic_action.finish = surf_get_clock();
       surf_network_model->action_state_set((surf_action_t) action,
                                            SURF_ACTION_DONE);
+      gap_remove(action);
     }
   }
 
@@ -267,8 +482,8 @@ static void net_update_actions_state(double now, double delta)
 }
 
 static void net_update_resource_state(void *id,
-                                  tmgr_trace_event_t event_type,
-                                  double value, double date)
+                                      tmgr_trace_event_t event_type,
+                                      double value, double date)
 {
   link_CM02_t nw_link = id;
   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
@@ -277,8 +492,9 @@ static void net_update_resource_state(void *id,
 
   if (event_type == nw_link->lmm_resource.power.event) {
     double delta =
-      weight_S_parameter / value - weight_S_parameter /
-      (nw_link->lmm_resource.power.peak * nw_link->lmm_resource.power.scale);
+        sg_weight_S_parameter / value - sg_weight_S_parameter /
+        (nw_link->lmm_resource.power.peak *
+         nw_link->lmm_resource.power.scale);
     lmm_variable_t var = NULL;
     lmm_element_t elem = NULL;
     surf_action_network_CM02_t action = NULL;
@@ -286,18 +502,24 @@ static void net_update_resource_state(void *id,
     nw_link->lmm_resource.power.peak = value;
     lmm_update_constraint_bound(network_maxmin_system,
                                 nw_link->lmm_resource.constraint,
-                                bandwidth_factor *
+                                sg_bandwidth_factor *
                                 (nw_link->lmm_resource.power.peak *
                                  nw_link->lmm_resource.power.scale));
-    if (weight_S_parameter > 0) {
+#ifdef HAVE_TRACING
+    TRACE_surf_link_set_bandwidth(date, nw_link,
+                                  sg_bandwidth_factor *
+                                  (nw_link->lmm_resource.power.peak *
+                                   nw_link->lmm_resource.power.scale));
+#endif
+    if (sg_weight_S_parameter > 0) {
       while ((var = lmm_get_var_from_cnst
               (network_maxmin_system, nw_link->lmm_resource.constraint,
                &elem))) {
         action = lmm_variable_id(var);
         action->weight += delta;
         if (!(action->suspended))
-          lmm_update_variable_weight(network_maxmin_system, action->variable,
-                                     action->weight);
+          lmm_update_variable_weight(network_maxmin_system,
+                                     action->variable, action->weight);
       }
     }
     if (tmgr_trace_event_free(event_type))
@@ -317,12 +539,21 @@ static void net_update_resource_state(void *id,
       action->weight += delta;
       if (action->rate < 0)
         lmm_update_variable_bound(network_maxmin_system, action->variable,
-                                  sg_tcp_gamma / (2.0 * action->lat_current));
-      else
+                                  sg_tcp_gamma / (2.0 *
+                                                  action->lat_current));
+      else {
         lmm_update_variable_bound(network_maxmin_system, action->variable,
                                   min(action->rate,
                                       sg_tcp_gamma / (2.0 *
                                                       action->lat_current)));
+
+        if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
+          INFO0("Flow is limited BYBANDWIDTH");
+        } else {
+          INFO1("Flow is limited BYLATENCY, latency of flow is %f",
+                action->lat_current);
+        }
+      }
       if (!(action->suspended))
         lmm_update_variable_weight(network_maxmin_system, action->variable,
                                    action->weight);
@@ -360,27 +591,42 @@ static void net_update_resource_state(void *id,
   return;
 }
 
-static surf_action_t net_communicate(const char *src_name, const char *dst_name,
-                                 int src, int dst, double size, double rate)
+
+static surf_action_t net_communicate(const char *src_name,
+                                     const char *dst_name, double size,
+                                     double rate)
 {
+  unsigned int i;
+  link_CM02_t link;
+  int failed = 0;
   surf_action_network_CM02_t action = NULL;
+  double bandwidth_bound;
+  double latency=0.0;
   /* LARGE PLATFORMS HACK:
      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
      Use the cluster_id for ->id */
-  xbt_dynar_t route = used_routing->get_route(src, dst);
+
+  xbt_dynar_t back_route = NULL;
+  int constraints_per_variable = 0;
+  // I will need this route for some time so let's call get_route_no_cleanup
+  xbt_dynar_t route = global_routing->get_route_no_cleanup(src_name, dst_name);
+
+
+  if (sg_network_fullduplex == 1) {
+    back_route = global_routing->get_route(dst_name, src_name);
+  }
+
   /* LARGE PLATFORMS HACK:
      total_route_size = route_size + src->link_nb + dst->nb */
-  unsigned int i;
 
   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
   /* LARGE PLATFORMS HACK:
      assert on total_route_size */
-  xbt_assert2(xbt_dynar_length(route),
-              "You're trying to send data from %s to %s but there is no connection between these two hosts.",
+  latency = global_routing->get_latency(src_name,dst_name);
+  xbt_assert2(xbt_dynar_length(route) || latency,
+              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
               src_name, dst_name);
 
-  link_CM02_t link;
-  int failed = 0;
   xbt_dynar_foreach(route, i, link) {
     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
       failed = 1;
@@ -388,41 +634,74 @@ static surf_action_t net_communicate(const char *src_name, const char *dst_name,
     }
   }
   action =
-    surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
-                    surf_network_model, failed);
+      surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
+                      surf_network_model, failed);
+#ifdef HAVE_LATENCY_BOUND_TRACKING
+  (action->generic_action).latency_limited = 0;
+#endif
+  action->weight = action->latency = latency;
 
   xbt_swag_insert(action, action->generic_action.state_set);
   action->rate = rate;
 
-  action->latency = 0.0;
-  action->weight = 0.0;
+  bandwidth_bound = -1.0;
+
   xbt_dynar_foreach(route, i, link) {
-    action->latency += link->lat_current;
     action->weight +=
-      link->lat_current +
-      weight_S_parameter /
-      (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
+        sg_weight_S_parameter /
+        (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
+    if (bandwidth_bound < 0.0)
+      bandwidth_bound =
+          (*bandwidth_factor_callback) (size) *
+          (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
+    else
+      bandwidth_bound =
+          min(bandwidth_bound,
+              (*bandwidth_factor_callback) (size) *
+              (link->lmm_resource.power.peak *
+               link->lmm_resource.power.scale));
   }
   /* LARGE PLATFORMS HACK:
      Add src->link and dst->link latencies */
   action->lat_current = action->latency;
-  action->latency *= latency_factor;
+  action->latency *= (*latency_factor_callback) (size);
+  action->rate =
+      (*bandwidth_constraint_callback) (action->rate, bandwidth_bound,
+                                        size);
+
+  if(xbt_dynar_length(route) > 0) {
+    link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
+    gap_append(size, link, action);
+    DEBUG5("Comm %p: %s -> %s gap=%f (lat=%f)",
+           action, src_name, dst_name, action->sender.gap, action->latency);
+  } else {
+    gap_unknown(action);
+  }
+
 
   /* LARGE PLATFORMS HACK:
      lmm_variable_new(..., total_route_size) */
+  if (back_route != NULL) {
+    constraints_per_variable =
+        xbt_dynar_length(route) + xbt_dynar_length(back_route);
+  } else {
+    constraints_per_variable = xbt_dynar_length(route);
+  }
+
   if (action->latency > 0)
     action->variable =
-      lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
-                       xbt_dynar_length(route));
+        lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
+                         constraints_per_variable);
   else
     action->variable =
-      lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
-                       xbt_dynar_length(route));
+        lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
+                         constraints_per_variable);
 
   if (action->rate < 0) {
     if (action->lat_current > 0)
       lmm_update_variable_bound(network_maxmin_system, action->variable,
-                                sg_tcp_gamma / (2.0 * action->lat_current));
+                                sg_tcp_gamma / (2.0 *
+                                                action->lat_current));
     else
       lmm_update_variable_bound(network_maxmin_system, action->variable,
                                 -1.0);
@@ -441,14 +720,35 @@ static surf_action_t net_communicate(const char *src_name, const char *dst_name,
     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
                action->variable, 1.0);
   }
+
+  if (sg_network_fullduplex == 1) {
+    DEBUG1("Fullduplex active adding backward flow using 5%c", '%');
+    xbt_dynar_foreach(back_route, i, link) {
+      lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
+                 action->variable, .05);
+    }
+  }
   /* LARGE PLATFORMS HACK:
      expand also with src->link and dst->link */
+#ifdef HAVE_TRACING
+  action->src_name = xbt_new(char, strlen(src_name) + 1);
+  strncpy(action->src_name, src_name, strlen(src_name) + 1);
+
+  action->dst_name = xbt_new(char, strlen(dst_name) + 1);
+  strncpy(action->dst_name, dst_name, strlen(dst_name) + 1);
+#endif
 
+  xbt_dynar_free(&route);
   XBT_OUT;
 
   return (surf_action_t) action;
 }
 
+static xbt_dynar_t net_get_route(const char *src, const char *dst)
+{
+  return global_routing->get_route(src, dst);
+}
+
 static double net_get_link_bandwidth(const void *link)
 {
   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
@@ -462,15 +762,16 @@ static double net_get_link_latency(const void *link)
 
 static int net_link_shared(const void *link)
 {
-  return lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
+  return
+      lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 }
 
 static void net_action_suspend(surf_action_t action)
 {
   ((surf_action_network_CM02_t) action)->suspended = 1;
   lmm_update_variable_weight(network_maxmin_system,
-                             ((surf_action_network_CM02_t) action)->variable,
-                             0.0);
+                             ((surf_action_network_CM02_t)
+                              action)->variable, 0.0);
 }
 
 static void net_action_resume(surf_action_t action)
@@ -479,7 +780,8 @@ static void net_action_resume(surf_action_t action)
     lmm_update_variable_weight(network_maxmin_system,
                                ((surf_action_network_CM02_t)
                                 action)->variable,
-                               ((surf_action_network_CM02_t) action)->weight);
+                               ((surf_action_network_CM02_t)
+                                action)->weight);
     ((surf_action_network_CM02_t) action)->suspended = 0;
   }
 }
@@ -489,17 +791,25 @@ static int net_action_is_suspended(surf_action_t action)
   return ((surf_action_network_CM02_t) action)->suspended;
 }
 
-static void net_action_set_max_duration(surf_action_t action, double duration)
+void net_action_set_max_duration(surf_action_t action, double duration)
 {
   action->max_duration = duration;
 }
 
+#ifdef HAVE_TRACING
+static void net_action_set_category(surf_action_t action, const char *category)
+{
+  action->category = xbt_strdup (category);
+}
+#endif
+
 static void net_finalize(void)
 {
   surf_model_exit(surf_network_model);
   surf_network_model = NULL;
 
-  used_routing->finalize();
+  global_routing->finalize();
+
   lmm_system_free(network_maxmin_system);
   network_maxmin_system = NULL;
 }
@@ -513,34 +823,71 @@ static void surf_network_model_init_internal(void)
   surf_network_model->action_cancel = net_action_cancel;
   surf_network_model->action_recycle = net_action_recycle;
   surf_network_model->get_remains = net_action_get_remains;
+#ifdef HAVE_LATENCY_BOUND_TRACKING
+  surf_network_model->get_latency_limited = net_get_link_latency_limited;
+#endif
 
   surf_network_model->model_private->resource_used = net_resource_used;
   surf_network_model->model_private->share_resources = net_share_resources;
   surf_network_model->model_private->update_actions_state =
-    net_update_actions_state;
+      net_update_actions_state;
   surf_network_model->model_private->update_resource_state =
-    net_update_resource_state;
+      net_update_resource_state;
   surf_network_model->model_private->finalize = net_finalize;
 
   surf_network_model->suspend = net_action_suspend;
   surf_network_model->resume = net_action_resume;
   surf_network_model->is_suspended = net_action_is_suspended;
-  surf_cpu_model->set_max_duration = net_action_set_max_duration;
+  surf_network_model->set_max_duration = net_action_set_max_duration;
+#ifdef HAVE_TRACING
+  surf_network_model->set_category = net_action_set_category;
+#endif
 
   surf_network_model->extension.network.communicate = net_communicate;
+  surf_network_model->extension.network.get_route = net_get_route;
   surf_network_model->extension.network.get_link_bandwidth =
-    net_get_link_bandwidth;
-  surf_network_model->extension.network.get_link_latency = net_get_link_latency;
+      net_get_link_bandwidth;
+  surf_network_model->extension.network.get_link_latency =
+      net_get_link_latency;
   surf_network_model->extension.network.link_shared = net_link_shared;
+  surf_network_model->extension.network.add_traces = net_add_traces;
+  surf_network_model->extension.network.create_resource =
+      net_create_resource;
 
   if (!network_maxmin_system)
     network_maxmin_system = lmm_system_new();
 
   routing_model_create(sizeof(link_CM02_t),
                        net_link_new(xbt_strdup("__loopback__"),
-                                498000000, NULL, 0.000015, NULL,
-                                SURF_RESOURCE_ON, NULL, SURF_LINK_FATPIPE,
-                                NULL));
+                                    498000000, NULL, 0.000015, NULL,
+                                    SURF_RESOURCE_ON, NULL,
+                                    SURF_LINK_FATPIPE, NULL),
+                      net_get_link_latency);
+}
+
+
+
+/************************************************************************/
+/* New model based on LV08 and experimental results of MPI ping-pongs   */
+/************************************************************************/
+void surf_network_model_init_SMPI(const char *filename)
+{
+
+  if (surf_network_model)
+    return;
+  surf_network_model_init_internal();
+  latency_factor_callback = &smpi_latency_factor;
+  bandwidth_factor_callback = &smpi_bandwidth_factor;
+  bandwidth_constraint_callback = &smpi_bandwidth_constraint;
+  net_define_callbacks(filename);
+  xbt_dynar_push(model_list, &surf_network_model);
+  network_solve = lmm_solve;
+
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
+
+  update_model_description(surf_network_model_description,
+                           "SMPI", surf_network_model);
 }
 
 /************************************************************************/
@@ -556,9 +903,10 @@ void surf_network_model_init_LegrandVelho(const char *filename)
   xbt_dynar_push(model_list, &surf_network_model);
   network_solve = lmm_solve;
 
-  latency_factor = 10.4;
-  bandwidth_factor = 0.92;
-  weight_S_parameter = 8775;
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
+                            0.92);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 
   update_model_description(surf_network_model_description,
                            "LV08", surf_network_model);
@@ -597,12 +945,14 @@ void surf_network_model_init_Reno(const char *filename)
   net_define_callbacks(filename);
 
   xbt_dynar_push(model_list, &surf_network_model);
-  lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
+  lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
+                                    func_reno_fpi);
   network_solve = lagrange_solve;
 
-  latency_factor = 10.4;
-  bandwidth_factor = 0.92;
-  weight_S_parameter = 8775;
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
+                            0.92);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 
   update_model_description(surf_network_model_description,
                            "Reno", surf_network_model);
@@ -621,9 +971,11 @@ void surf_network_model_init_Reno2(const char *filename)
                                     func_reno2_fpi);
   network_solve = lagrange_solve;
 
-  latency_factor = 10.4;
-  bandwidth_factor = 0.92;
-  weight_S_parameter = 8775;
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
+                            0.92);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
+                            8775);
 
   update_model_description(surf_network_model_description,
                            "Reno2", surf_network_model);
@@ -641,9 +993,10 @@ void surf_network_model_init_Vegas(const char *filename)
                                     func_vegas_fpi);
   network_solve = lagrange_solve;
 
-  latency_factor = 10.4;
-  bandwidth_factor = 0.92;
-  weight_S_parameter = 8775;
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
+                            0.92);
+  xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
 
   update_model_description(surf_network_model_description,
                            "Vegas", surf_network_model);