X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c7b463c9c17665403d001fc59cb649551e93d950..ccedb07575381e28a3143247e9028fe4f73bcd96:/src/surf/maxmin.c

diff --git a/src/surf/maxmin.c b/src/surf/maxmin.c
index 9598be29a1..dc00903ec1 100644
--- a/src/surf/maxmin.c
+++ b/src/surf/maxmin.c
@@ -15,7 +15,13 @@
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_maxmin, surf,
                                 "Logging specific to SURF (maxmin)");
 
-double sg_maxmin_precision = 0.00001;
+typedef struct s_dyn_light {
+  int *data;
+  int pos;
+  int size;
+} s_dyn_light_t, *dyn_light_t;
+
+XBT_PUBLIC(double) sg_maxmin_precision = 0.00001;
 
 static void *lmm_variable_mallocator_new_f(void);
 static void lmm_variable_mallocator_free_f(void *var);
@@ -26,6 +32,10 @@ static void lmm_remove_all_modified_set(lmm_system_t sys);
 static int Global_debug_id = 1;
 static int Global_const_debug_id = 1;
 
+static void lmm_var_free(lmm_system_t sys, lmm_variable_t var);
+static XBT_INLINE void lmm_cnst_free(lmm_system_t sys,
+                                     lmm_constraint_t cnst);
+
 lmm_system_t lmm_system_new(int selective_update)
 {
   lmm_system_t l = NULL;
@@ -364,53 +374,46 @@ XBT_INLINE void *lmm_variable_id(lmm_variable_t var)
   return var->id;
 }
 
-static XBT_INLINE int saturated_constraint_set_update(lmm_system_t sys,
-                                                      lmm_constraint_t
-                                                      cnst,
+static XBT_INLINE void saturated_constraint_set_update(double usage,
+                                                      int cnst_light_num,
+                                                      dyn_light_t saturated_constraint_set,
                                                       double *min_usage)
 {
-  volatile double usage;
+  xbt_assert(usage > 0,"Impossible");
 
-  XBT_IN("sys=%p, cnst=%p, min_usage=%f", sys, cnst, *min_usage);
-  if (cnst->usage <= 0) {
-    XBT_OUT();
-    return 1;
-  }
-  if (cnst->remaining <= 0) {
-    XBT_OUT();
-    return 1;
-  }
-  usage = cnst->remaining / cnst->usage;
   if (*min_usage < 0 || *min_usage > usage) {
     *min_usage = usage;
-    XBT_HERE(" min_usage=%f (cnst->remaining=%f, cnst->usage=%f)",
-             *min_usage, cnst->remaining, cnst->usage);
-    xbt_swag_reset(&sys->saturated_constraint_set);
-    xbt_swag_insert(cnst, &sys->saturated_constraint_set);
+    // XBT_HERE(" min_usage=%f (cnst->remaining / cnst->usage =%f)", *min_usage, usage);
+    saturated_constraint_set->data[0] = cnst_light_num;
+    saturated_constraint_set->pos = 1;
   } else if (*min_usage == usage) {
-    xbt_swag_insert(cnst, &sys->saturated_constraint_set);
+    if(saturated_constraint_set->pos == saturated_constraint_set->size) { // realloc the size
+      saturated_constraint_set->size *= 2;
+      saturated_constraint_set->data = realloc(saturated_constraint_set->data, (saturated_constraint_set->size) * sizeof(int));
+    }
+    saturated_constraint_set->data[saturated_constraint_set->pos] = cnst_light_num;
+    saturated_constraint_set->pos++;
   }
-  XBT_OUT();
-  return 0;
 }
 
-static XBT_INLINE void saturated_variable_set_update(lmm_system_t sys)
+static XBT_INLINE void saturated_variable_set_update(
+    s_lmm_constraint_light_t *cnst_light_tab,
+    dyn_light_t saturated_constraint_set,
+    lmm_system_t sys)
 {
-  lmm_constraint_t cnst = NULL;
-  xbt_swag_t cnst_list = NULL;
+  lmm_constraint_light_t cnst = NULL;
   lmm_element_t elem = NULL;
   xbt_swag_t elem_list = NULL;
-
-  cnst_list = &(sys->saturated_constraint_set);
-  while ((cnst = xbt_swag_getFirst(cnst_list))) {
-    elem_list = &(cnst->active_element_set);
+  int i;
+  for(i = 0; i< saturated_constraint_set->pos; i++){
+    cnst = &cnst_light_tab[saturated_constraint_set->data[i]];
+    elem_list = &(cnst->cnst->active_element_set);
     xbt_swag_foreach(elem, elem_list) {
       if (elem->variable->weight <= 0)
         break;
       if ((elem->value > 0))
         xbt_swag_insert(elem->variable, &(sys->saturated_variable_set));
     }
-    xbt_swag_remove(cnst, cnst_list);
   }
 }
 
@@ -546,6 +549,12 @@ void lmm_solve(lmm_system_t sys)
     }
   }
 
+  s_lmm_constraint_light_t *cnst_light_tab = (s_lmm_constraint_light_t *)xbt_malloc0(xbt_swag_size(cnst_list)*sizeof(s_lmm_constraint_light_t));
+  int cnst_light_num = 0;
+  dyn_light_t saturated_constraint_set = xbt_new0(s_dyn_light_t,1);
+  saturated_constraint_set->size = 5;
+  saturated_constraint_set->data = xbt_new0(int, saturated_constraint_set->size);
+
   xbt_swag_foreach_safe(cnst, cnst_next, cnst_list) {
     /* INIT */
     cnst->remaining = cnst->bound;
@@ -570,23 +579,20 @@ void lmm_solve(lmm_system_t sys)
     }
     XBT_DEBUG("Constraint Usage '%d' : %f", cnst->id_int, cnst->usage);
     /* Saturated constraints update */
-    if(cnst->usage>0) {
-      // TODO Créer une contrainte light
-      // À partir de maintenant, usage et remaining sont dans cnst_light uniquement.
-      // En fait, usage et remaining doivent disparaitre complètement de cnst pour n'être que dans cnst_light.
-      xbt_swag_remove(cnst, cnst_list);
-      xbt_swag_insert_at_head(cnst, cnst_list);
+
+    if(cnst->usage > 0) {
+      cnst_light_tab[cnst_light_num].cnst = cnst;
+      cnst->cnst_light = &(cnst_light_tab[cnst_light_num]);
+      cnst_light_tab[cnst_light_num].remaining_over_usage = cnst->remaining / cnst->usage;
+      saturated_constraint_set_update(cnst_light_tab[cnst_light_num].remaining_over_usage,
+        cnst_light_num, saturated_constraint_set, &min_usage);
+      cnst_light_num++;
     }
-    // On a deux dynars:
-    //    - Celui de cnst_list avec les csnt_light
-    //    - saturated_constraint_set, celui des indexes de cnst_list qui sont saturées
-    // Si la cnst_light est un minimum_usage on la met dans saturated_constraint_set
-    saturated_constraint_set_update(sys, cnst, &min_usage);
   }
-  // On parcours saturated_constraint_set (le tableau d'index) dans le sens décroissant
-  //   - on accède aux contraintes correspondantes pour mettre les variables dans saturated_variable_set
-  //   - on se permutte si besoin avec le dernier élément; on enlève le dernier élément de cnst_list
-  saturated_variable_set_update(sys);
+
+  saturated_variable_set_update(  cnst_light_tab,
+                                  saturated_constraint_set,
+                                  sys);
 
   /* Saturated variables update */
 
@@ -639,26 +645,41 @@ void lmm_solve(lmm_system_t sys)
           double_update(&(cnst->remaining), elem->value * var->value);
           double_update(&(cnst->usage), elem->value / var->weight);
           if(cnst->usage<=0 || cnst->remaining<=0) {
-            xbt_swag_remove(cnst, cnst_list);
-            xbt_swag_insert_at_tail(cnst, cnst_list);
+            if (cnst->cnst_light) {
+              int index = (cnst->cnst_light-cnst_light_tab);
+              XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p \t cnst_light_tab: %p ",
+                  index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab);
+              cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
+              cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
+              cnst_light_num--;
+              cnst->cnst_light = NULL;
+            }
+          } else {
+            cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
           }
           make_elem_inactive(elem);
-        } else {                /* FIXME one day: We recompute usage.... :( */
+        } else {
           cnst->usage = 0.0;
           make_elem_inactive(elem);
           elem_list = &(cnst->element_set);
           xbt_swag_foreach(elem, elem_list) {
-            if (elem->variable->weight <= 0)
+            if (elem->variable->weight <= 0 || elem->variable->value > 0)
               break;
-            if (elem->variable->value > 0)
-              break;
-            if ((elem->value > 0)) {
-              cnst->usage =
-                  MAX(cnst->usage, elem->value / elem->variable->weight);
-              XBT_DEBUG("Constraint Usage %d : %f", cnst->id_int,
-                     cnst->usage);
-              make_elem_active(elem);
+            if (elem->value > 0)
+              cnst->usage = MAX(cnst->usage, elem->value / elem->variable->weight);
+          }
+          if (cnst->usage<=0 || cnst->remaining<=0) {
+            if(cnst->cnst_light) {
+              int index = (cnst->cnst_light-cnst_light_tab);
+              XBT_DEBUG("index: %d \t cnst_light_num: %d \t || \t cnst: %p \t cnst->cnst_light: %p \t cnst_light_tab: %p ",
+                  index,cnst_light_num, cnst, cnst->cnst_light, cnst_light_tab);
+              cnst_light_tab[index]=cnst_light_tab[cnst_light_num-1];
+              cnst_light_tab[index].cnst->cnst_light = &cnst_light_tab[index];
+              cnst_light_num--;
+              cnst->cnst_light = NULL;
             }
+          } else {
+            cnst->cnst_light->remaining_over_usage = cnst->remaining / cnst->usage;
           }
         }
       }
@@ -668,13 +689,20 @@ void lmm_solve(lmm_system_t sys)
     /* Find out which variables reach the maximum */
     min_usage = -1;
     min_bound = -1;
+    saturated_constraint_set->pos = 0;
+    int pos;
+    for(pos=0; pos<cnst_light_num; pos++)
+      saturated_constraint_set_update(
+          cnst_light_tab[pos].remaining_over_usage,
+          pos,
+          saturated_constraint_set,
+          &min_usage);
 
-    xbt_swag_foreach(cnst, cnst_list) {
-      if(saturated_constraint_set_update(sys, cnst, &min_usage)) break;
-    }
-    saturated_variable_set_update(sys);
+    saturated_variable_set_update(  cnst_light_tab,
+                                    saturated_constraint_set,
+                                    sys);
 
-  } while (xbt_swag_size(&(sys->saturated_variable_set)));
+  } while (cnst_light_num > 0);
 
   sys->modified = 0;
   if (sys->selective_update_active)
@@ -683,6 +711,10 @@ void lmm_solve(lmm_system_t sys)
   if (XBT_LOG_ISENABLED(surf_maxmin, xbt_log_priority_debug)) {
     lmm_print(sys);
   }
+
+  xbt_free(saturated_constraint_set->data);
+  xbt_free(saturated_constraint_set);
+  xbt_free(cnst_light_tab);
   XBT_OUT();
 }