X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/43d5ef82ce405e8a5b9dee0e51ce0d64051dd2af..900cb23da16eeaad345fd16101f2ea986f2706bd:/src/surf/surf.c

diff --git a/src/surf/surf.c b/src/surf/surf.c
index 29daa326f5..5b603282d2 100644
--- a/src/surf/surf.c
+++ b/src/surf/surf.c
@@ -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. */
@@ -9,49 +8,46 @@
 
 #include "surf_private.h"
 #include "xbt/module.h"
+#include "mc/mc.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_kernel, surf,
-				"Logging specific to SURF (kernel)");
-
-int use_sdp_solver=0;
-int use_lagrange_solver=0;
+                                "Logging specific to SURF (kernel)");
 
 /* Additional declarations for Windows potability. */
 
 #ifndef MAX_DRIVE
 #define MAX_DRIVE 26
-#endif 
+#endif
 
 #ifdef _WIN32
 #include <windows.h>
-static const char* disk_drives_letter_table[MAX_DRIVE] =
-{
-        "A:\\",
-        "B:\\",
-        "C:\\",
-        "D:\\",
-        "E:\\",
-        "F:\\",
-        "G:\\",
-        "H:\\",
-        "I:\\",
-        "J:\\",
-        "K:\\",
-        "L:\\",
-        "M:\\",
-        "N:\\",
-        "O:\\",
-        "P:\\",
-        "Q:\\",
-        "R:\\",
-        "S:\\",
-        "T:\\",
-        "U:\\",
-        "V:\\",
-        "W:\\",
-        "X:\\",
-        "Y:\\",
-        "Z:\\"
+static const char *disk_drives_letter_table[MAX_DRIVE] = {
+  "A:\\",
+  "B:\\",
+  "C:\\",
+  "D:\\",
+  "E:\\",
+  "F:\\",
+  "G:\\",
+  "H:\\",
+  "I:\\",
+  "J:\\",
+  "K:\\",
+  "L:\\",
+  "M:\\",
+  "N:\\",
+  "O:\\",
+  "P:\\",
+  "Q:\\",
+  "R:\\",
+  "S:\\",
+  "T:\\",
+  "U:\\",
+  "V:\\",
+  "W:\\",
+  "X:\\",
+  "Y:\\",
+  "Z:\\"
 };
 #endif /* #ifdef _WIN32 */
 
@@ -61,155 +57,135 @@ static const char* disk_drives_letter_table[MAX_DRIVE] =
  * case the function returns "./" that represents the current
  * directory on Unix/Linux platforms.
  */
-			
-const char* __surf_get_initial_path(void)
+
+const char *__surf_get_initial_path(void)
 {
 
-	#ifdef _WIN32
-	unsigned i;
-	char current_directory[MAX_PATH + 1] = {0};
-	unsigned int len = GetCurrentDirectory(MAX_PATH + 1,current_directory);
-	char root[4] = {0};
+#ifdef _WIN32
+  unsigned i;
+  char current_directory[MAX_PATH + 1] = { 0 };
+  unsigned int len = GetCurrentDirectory(MAX_PATH + 1, current_directory);
+  char root[4] = { 0 };
 
-	if(!len)
-		return NULL;
+  if (!len)
+    return NULL;
 
-	strncpy(root,current_directory,3);
+  strncpy(root, current_directory, 3);
 
-	for(i = 0; i<MAX_DRIVE;i++)
-	{
-		if(toupper(root[0]) == disk_drives_letter_table[i][0])
-			return disk_drives_letter_table[i];
-	}
+  for (i = 0; i < MAX_DRIVE; i++) {
+    if (toupper(root[0]) == disk_drives_letter_table[i][0])
+      return disk_drives_letter_table[i];
+  }
 
-	return NULL;
-	#else
-	return "./";
-	#endif
+  return NULL;
+#else
+  return "./";
+#endif
 }
 
 /* The __surf_is_absolute_file_path() returns 1 if
  * file_path is a absolute file path, in the other
  * case the function returns 0.
  */
-int __surf_is_absolute_file_path(const char* file_path)
+int __surf_is_absolute_file_path(const char *file_path)
 {
-        #ifdef _WIN32
-        WIN32_FIND_DATA wfd ={0};
-        HANDLE hFile = FindFirstFile(file_path,&wfd);
-
-        if(INVALID_HANDLE_VALUE == hFile)
-                return 0;
-
-        FindClose(hFile);
-        return 1;
-        #else
-        return (file_path[0] == '/');
-        #endif
-}
+#ifdef _WIN32
+  WIN32_FIND_DATA wfd = { 0 };
+  HANDLE hFile = FindFirstFile(file_path, &wfd);
+
+  if (INVALID_HANDLE_VALUE == hFile)
+    return 0;
 
-typedef struct surf_resource_object {
-  surf_resource_t resource;
-} s_surf_resource_object_t, *surf_resource_object_t;
+  FindClose(hFile);
+  return 1;
+#else
+  return (file_path[0] == '/');
+#endif
+}
 
-static double NOW = 0;
+double NOW = 0;
 
-xbt_dynar_t resource_list = NULL;
+xbt_dynar_t model_list = NULL;
 tmgr_history_t history = NULL;
 lmm_system_t maxmin_system = NULL;
 xbt_dynar_t surf_path = NULL;
-const char *surf_action_state_names[6] = {
-  "SURF_ACTION_READY", 
-  "SURF_ACTION_RUNNING", 
-  "SURF_ACTION_FAILED", 
-  "SURF_ACTION_DONE", 
-  "SURF_ACTION_TO_FREE", 
-  "SURF_ACTION_NOT_IN_THE_SYSTEM"
-};
 
-int surf_network_resource_description_size=3
-  #ifdef HAVE_GTNETS
-     +1
-  #endif
-  #ifdef HAVE_SDP
-     +1
-  #endif
-;
-s_surf_resource_description_t surf_network_resource_description[]=
-  {
-    {"CM02",NULL,surf_network_resource_init_CM02},
+/* Don't forget to update the option description in smx_config when you change this */
+s_surf_model_description_t surf_network_model_description[] = {
+    {"Constant", "Simplistic network model where all communication take a constant time (one second)", NULL, surf_network_model_init_Constant},
+    {"Vivaldi", "Scalable network model using the Vivaldi coordinate ideas", NULL, surf_network_model_init_Vivaldi},
+  {"CM02", "Realistic network model with lmm_solve and no correction factors", NULL, surf_network_model_init_CM02},
+  {"LV08", "Realistic network model with lmm_solve and these correction factors: latency*=10.4, bandwidth*=.92, S=8775" , NULL, surf_network_model_init_LegrandVelho},
 #ifdef HAVE_GTNETS
-    {"GTNets",NULL,surf_network_resource_init_GTNETS},
+  {"GTNets", "Network Pseudo-model using the GTNets simulator instead of an analytic model", NULL, surf_network_model_init_GTNETS},
 #endif
-#ifdef HAVE_SDP
-    {"SDP",NULL,surf_network_resource_init_SDP},
-#endif
-    {"Reno",NULL,surf_network_resource_init_Reno},
-    {"Vegas",NULL,surf_network_resource_init_Vegas}
-  };
-
-int surf_cpu_resource_description_size=1;
-s_surf_resource_description_t surf_cpu_resource_description[]=
-  {
-    {"Cas01",NULL,surf_cpu_resource_init_Cas01},
-  };
-
-int surf_workstation_resource_description_size=3;
-s_surf_resource_description_t surf_workstation_resource_description[]=
-  {
-    {"CLM03",NULL,surf_workstation_resource_init_CLM03},
-    {"KCCFLN05",NULL,surf_workstation_resource_init_KCCFLN05},
-    {"compound",NULL,surf_workstation_resource_init_compound}
-  };
-
-void update_resource_description(s_surf_resource_description_t *table,
-				 int table_size,
-				 const char* name, 
-				 surf_resource_t resource
-				 ) 
+  {"Reno", "Model using lagrange_solve instead of lmm_solve (experts only)", NULL, surf_network_model_init_Reno},
+  {"Reno2", "Model using lagrange_solve instead of lmm_solve (experts only)", NULL, surf_network_model_init_Reno2},
+  {"Vegas", "Model using lagrange_solve instead of lmm_solve (experts only)", NULL, surf_network_model_init_Vegas},
+  {NULL, NULL, NULL, NULL}            /* this array must be NULL terminated */
+};
+
+s_surf_model_description_t surf_cpu_model_description[] = {
+  {"Cas01_fullupdate", "CPU classical model time=size/power", NULL, surf_cpu_model_init_Cas01},
+  {"Cas01", "Variation of Cas01_fullupdate with partial invalidation optimization of lmm system. Should produce the same values, only faster", NULL, surf_cpu_model_init_Cas01_im},
+  {"CpuTI", "Variation of Cas01 with also trace integration. Should produce the same values, only faster if you use availability traces", NULL, surf_cpu_model_init_ti},
+  {NULL, NULL, NULL, NULL}            /* this array must be NULL terminated */
+};
+
+s_surf_model_description_t surf_workstation_model_description[] = {
+  {"CLM03", "Default workstation model, using LV08 and CM02 as network and CPU", NULL, surf_workstation_model_init_CLM03, create_workstations},
+  {"compound", "Workstation model allowing you to use other network and CPU models", NULL, surf_workstation_model_init_compound, create_workstations},
+  {"ptask_L07", "Workstation model with better parallel task modeling", NULL, surf_workstation_model_init_ptask_L07, NULL},
+  {NULL, NULL, NULL, NULL}            /* this array must be NULL terminated */
+};
+
+void update_model_description(s_surf_model_description_t * table,
+                              const char *name, surf_model_t model)
 {
-  int i = find_resource_description(table, table_size, name);
-  table[i].resource=resource;
+  int i = find_model_description(table, name);
+  table[i].model = model;
+}
+
+/** Displays the long description of all registered models, and quit */
+void model_help(const char* category, s_surf_model_description_t * table) {
+  int i;
+  printf("Long description of the %s models accepted by this simulator:\n",category);
+  for (i = 0; table[i].name; i++)
+    printf("  %s: %s\n", table[i].name, table[i].description);
 }
 
-int find_resource_description(s_surf_resource_description_t *table,
-			       int table_size,
-			       const char* name)
+int find_model_description(s_surf_model_description_t * table,
+                           const char *name)
 {
   int i;
-  char *name_list=NULL;
+  char *name_list = NULL;
 
-  for(i=0;i<table_size;i++)
-    if(!strcmp(name,table[i].name)) {
+  for (i = 0; table[i].name; i++)
+    if (!strcmp(name, table[i].name)) {
       return i;
     }
-  name_list=strdup(table[0].name);
-  for(i=1;i<table_size;i++) {
-    name_list = xbt_realloc(name_list,strlen(name_list)+strlen(table[i].name)+2);
-    strcat(name_list,", ");
-    strcat(name_list,table[i].name);
+  name_list = strdup(table[0].name);
+  for (i = 1; table[i].name; i++) {
+    name_list =
+      xbt_realloc(name_list, strlen(name_list) + strlen(table[i].name) + 2);
+    strcat(name_list, ", ");
+    strcat(name_list, table[i].name);
   }
-  xbt_assert2(0, "Model '%s' is invalid! Valid models are: %s.",name,name_list);
+  xbt_assert2(0, "Model '%s' is invalid! Valid models are: %s.", name,
+              name_list);
 }
 
 double generic_maxmin_share_resources(xbt_swag_t running_actions,
-				       size_t offset)
-{
-  return  generic_maxmin_share_resources2(running_actions, offset,
-					  maxmin_system, lmm_solve);
-}
-
-double generic_maxmin_share_resources2(xbt_swag_t running_actions,
-				       size_t offset,
-				       lmm_system_t sys,
-				       void (*solve)(lmm_system_t))
+                                      size_t offset,
+                                      lmm_system_t sys,
+                                      void (*solve) (lmm_system_t))
 {
   surf_action_t action = NULL;
   double min = -1;
   double value = -1;
 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
 
-  xbt_assert0(solve,"Give me a real solver function!");
+  xbt_assert0(solve, "Give me a real solver function!");
   solve(sys);
 
   xbt_swag_foreach(action, running_actions) {
@@ -222,181 +198,131 @@ double generic_maxmin_share_resources2(xbt_swag_t running_actions,
     return -1.0;
 
   if (value > 0) {
-    min = action->remains / value;
+    if (action->remains > 0)
+      min = action->remains / value;
+    else
+      min = 0.0;
     if ((action->max_duration >= 0) && (action->max_duration < min))
       min = action->max_duration;
   } else
     min = action->max_duration;
 
-  DEBUG5("Found an action (%p: duration = %f, remains = %f, value = %f) ! %f",action, action->max_duration, action->remains, value, min); 
 
   for (action = xbt_swag_getNext(action, running_actions->offset);
-       action;
-       action = xbt_swag_getNext(action, running_actions->offset)) {
+       action; action = xbt_swag_getNext(action, running_actions->offset)) {
     value = lmm_variable_getvalue(VARIABLE(action));
     if (value > 0) {
-      value = action->remains / value;
+      if (action->remains > 0)
+        value = action->remains / value;
+      else
+        value = 0.0;
       if (value < min) {
-	min = value;
-	DEBUG2("Updating min (value) with %p: %f",action, min);
+        min = value;
+        DEBUG2("Updating min (value) with %p: %f", action, min);
       }
     }
     if ((action->max_duration >= 0) && (action->max_duration < min)) {
       min = action->max_duration;
-      DEBUG2("Updating min (duration) with %p: %f",action, min);
+      DEBUG2("Updating min (duration) with %p: %f", action, min);
     }
   }
-  DEBUG1("min value : %f",min);
+  DEBUG1("min value : %f", min);
 
 #undef VARIABLE
   return min;
 }
 
-e_surf_action_state_t surf_action_get_state(surf_action_t action)
-{
-  surf_action_state_t action_state =
-      &(action->resource_type->common_public->states);
-
-  if (action->state_set == action_state->ready_action_set)
-    return SURF_ACTION_READY;
-  if (action->state_set == action_state->running_action_set)
-    return SURF_ACTION_RUNNING;
-  if (action->state_set == action_state->failed_action_set)
-    return SURF_ACTION_FAILED;
-  if (action->state_set == action_state->done_action_set)
-    return SURF_ACTION_DONE;
-  return SURF_ACTION_NOT_IN_THE_SYSTEM;
-}
-
-double surf_action_get_start_time(surf_action_t action) {
-  return action->start;
-}
-
-double surf_action_get_finish_time(surf_action_t action) {
-  return action->finish;
-}
 
-void surf_action_free(surf_action_t * action)
-{
-  (*action)->resource_type->common_public->action_cancel(*action);
-  free(*action);
-  *action = NULL;
-}
+XBT_LOG_EXTERNAL_CATEGORY(surf_cpu);
+XBT_LOG_EXTERNAL_CATEGORY(surf_kernel);
+XBT_LOG_EXTERNAL_CATEGORY(surf_lagrange);
+XBT_LOG_EXTERNAL_CATEGORY(surf_lagrange_dichotomy);
+XBT_LOG_EXTERNAL_CATEGORY(surf_maxmin);
+XBT_LOG_EXTERNAL_CATEGORY(surf_network);
+XBT_LOG_EXTERNAL_CATEGORY(surf_trace);
+XBT_LOG_EXTERNAL_CATEGORY(surf_parse);
+XBT_LOG_EXTERNAL_CATEGORY(surf_timer);
+XBT_LOG_EXTERNAL_CATEGORY(surf_workstation);
+XBT_LOG_EXTERNAL_CATEGORY(surf_config);
+XBT_LOG_EXTERNAL_CATEGORY(surf_routing);
 
-void surf_action_change_state(surf_action_t action,
-			      e_surf_action_state_t state)
-{
-  surf_action_state_t action_state =
-      &(action->resource_type->common_public->states);
-  XBT_IN2("(%p,%s)", action, surf_action_state_names[state]);
-  xbt_swag_remove(action, action->state_set);
-
-  if (state == SURF_ACTION_READY)
-    action->state_set = action_state->ready_action_set;
-  else if (state == SURF_ACTION_RUNNING)
-    action->state_set = action_state->running_action_set;
-  else if (state == SURF_ACTION_FAILED)
-    action->state_set = action_state->failed_action_set;
-  else if (state == SURF_ACTION_DONE)
-    action->state_set = action_state->done_action_set;
-  else
-    action->state_set = NULL;
-
-  if (action->state_set)
-    xbt_swag_insert(action, action->state_set);
-  XBT_OUT;
-}
 
-void surf_action_set_data(surf_action_t action,
-			  void *data)
-{
-  action->data=data;
-}
+#ifdef HAVE_GTNETS
+XBT_LOG_EXTERNAL_CATEGORY(surf_network_gtnets);
+#endif
 
 void surf_init(int *argc, char **argv)
-{
-  int i,j;
-  char *opt;
-  
-  const char* initial_path;
+{ 
+  /* Connect our log channels: that must be done manually under windows */
+  XBT_LOG_CONNECT(surf_cpu, surf);
+  XBT_LOG_CONNECT(surf_kernel, surf);
+  XBT_LOG_CONNECT(surf_lagrange, surf);
+  XBT_LOG_CONNECT(surf_lagrange_dichotomy, surf_lagrange);
+  XBT_LOG_CONNECT(surf_maxmin, surf);
+  XBT_LOG_CONNECT(surf_network, surf);
+  XBT_LOG_CONNECT(surf_trace, surf);
+  XBT_LOG_CONNECT(surf_parse, surf);
+  XBT_LOG_CONNECT(surf_timer, surf);
+  XBT_LOG_CONNECT(surf_workstation, surf);
+  XBT_LOG_CONNECT(surf_config, surf);
+  XBT_LOG_CONNECT(surf_routing, surf);
+
+#ifdef HAVE_GTNETS
+  XBT_LOG_CONNECT(surf_network_gtnets, surf);
+#endif
 
   xbt_init(argc, argv);
-  if (!surf_path) {
-    
-    /* retrieves the current directory of the current process*/
-    initial_path = __surf_get_initial_path();
-		
-	xbt_assert0((initial_path), "__surf_get_initial_path() failed! Can't resolves current Windows directory");
-    
-    surf_path = xbt_dynar_new(sizeof(char*), NULL);
-    xbt_dynar_push(surf_path,&initial_path);
-
-    for (i=1; i<*argc; i++) {
-      if (!strncmp(argv[i],"--surf-path=",strlen("--surf-path="))) {
-	opt=strchr(argv[i],'=');
-	opt++;
-	xbt_dynar_push(surf_path,&opt);
-	/*remove this from argv*/
-	for (j=i+1; j<*argc; j++) {
-	  argv[j-1] = argv[j];
-	} 
-	argv[j-1] = NULL;
-	(*argc)--;
-	i--; /* compensate effect of next loop incrementation */
-      }
-    }
-  }
-  if (!resource_list)
-    resource_list = xbt_dynar_new(sizeof(surf_resource_private_t), NULL);
+  if (!model_list)
+    model_list = xbt_dynar_new(sizeof(surf_model_private_t), NULL);
   if (!history)
     history = tmgr_history_new();
-  if (!maxmin_system)
-    maxmin_system = lmm_system_new();
+
+  surf_config_init(argc, argv);
+
+  if (_surf_do_model_check)
+    MC_memory_init();
 }
 
-static char* path_name = NULL;
+#ifdef WIN32
+# define FILE_DELIM "\\"
+#else
+# define FILE_DELIM "/"         /* FIXME: move to better location */
+#endif
+
 FILE *surf_fopen(const char *name, const char *mode)
 {
-  int i; 
-  char* path = NULL;
+  unsigned int cpt;
+  char *path_elm = NULL;
+  char *buff;
   FILE *file = NULL;
-  int path_name_len = 0; /* don't count '\0' */
-
-  xbt_assert0(name, "Need a non-NULL file name");
-
-  xbt_assert0(surf_path,"surf_init has to be called before using surf_fopen");
-   
-  if (__surf_is_absolute_file_path(name)) { /* don't mess with absolute file names */
-    return fopen(name,mode);
-     
-  } else { /* search relative files in the path */
-   
-    if(!path_name) {
-       path_name_len = strlen(name);
-       path_name=xbt_new0(char,path_name_len+1);
-    }
 
-    xbt_dynar_foreach(surf_path,i,path) {
-      if(path_name_len < strlen(path)+strlen(name)+1) {
-	 path_name_len = strlen(path)+strlen(name)+1; /* plus '/' */
-	 path_name=xbt_realloc(path_name,path_name_len+1);
-      }
-      sprintf(path_name,"%s/%s",path, name);
-      file = fopen(path_name,mode);
-      if (file) return file;
-    }
+  xbt_assert(name);
+
+  if (__surf_is_absolute_file_path(name))       /* don't mess with absolute file names */
+    return fopen(name, mode);
+
+  /* search relative files in the path */
+  xbt_dynar_foreach(surf_path, cpt, path_elm) {
+    buff = bprintf("%s" FILE_DELIM "%s", path_elm, name);
+    file = fopen(buff, mode);
+    free(buff);
+
+    if (file)
+      return file;
   }
-  return file;
+  return NULL;
 }
 
 void surf_exit(void)
 {
-  int i;
-  surf_resource_t resource = NULL;
+  unsigned int iter;
+  surf_model_t model = NULL;
 
-  xbt_dynar_foreach(resource_list, i, resource) {
-    resource->common_private->finalize();
-  }
+  surf_config_finalize();
+
+  xbt_dynar_foreach(model_list, iter, model)
+    model->model_private->finalize();
+  xbt_dynar_free(&model_list);
 
   if (maxmin_system) {
     lmm_system_free(maxmin_system);
@@ -406,101 +332,103 @@ void surf_exit(void)
     tmgr_history_free(history);
     history = NULL;
   }
-  if (resource_list)
-    xbt_dynar_free(&resource_list);
 
-  if(surf_path) 
+  if (surf_path)
     xbt_dynar_free(&surf_path);
 
   tmgr_finalize();
   surf_parse_lex_destroy();
-  if(path_name) {
-    free(path_name);
-    path_name = NULL;
+  surf_parse_free_callbacks();
+  xbt_dict_free(&route_table);
+  NOW = 0;                      /* Just in case the user plans to restart the simulation afterward */
+}
+
+void surf_presolve(void)
+{
+  double next_event_date = -1.0;
+  tmgr_trace_event_t event = NULL;
+  double value = -1.0;
+  surf_resource_t resource = NULL;
+  surf_model_t model = NULL;
+  unsigned int iter;
+
+  DEBUG0
+    ("First Run! Let's \"purge\" events and put models in the right state");
+  while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
+    if (next_event_date > NOW)
+      break;
+    while ((event =
+            tmgr_history_get_next_event_leq(history, next_event_date,
+                                            &value, (void **) &resource))) {
+      resource->model->model_private->update_resource_state(resource,
+                                                            event, value,
+                                                            NOW);
+    }
   }
-  xbt_exit();
+  xbt_dynar_foreach(model_list, iter, model)
+    model->model_private->update_actions_state(NOW, 0.0);
 }
 
 double surf_solve(void)
 {
-  static int first_run = 1;
-
   double min = -1.0;
   double next_event_date = -1.0;
-  double resource_next_action_end = -1.0;
+  double model_next_action_end = -1.0;
   double value = -1.0;
-  surf_resource_object_t resource_obj = NULL;
   surf_resource_t resource = NULL;
+  surf_model_t model = NULL;
   tmgr_trace_event_t event = NULL;
-  int i;
-
-  if (first_run) {
-    DEBUG0("First Run! Let's \"purge\" events and put resources in the right state");
-    while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
-      if (next_event_date > NOW)
-	break;
-      while ((event =
-	      tmgr_history_get_next_event_leq(history, next_event_date,
-					      &value,
-					      (void **) &resource_obj))) {
-	resource_obj->resource->common_private->
-	    update_resource_state(resource_obj, event, value);
-      }
-    }
-    xbt_dynar_foreach(resource_list, i, resource) {
-      resource->common_private->update_actions_state(NOW, 0.0);
-    }
-    first_run = 0;
-    return 0.0;
-  }
+  unsigned int iter;
 
   min = -1.0;
 
   DEBUG0("Looking for next action end");
-  xbt_dynar_foreach(resource_list, i, resource) {
-    DEBUG1("Running for Resource [%s]",resource->common_public->name);
-    resource_next_action_end =
-	resource->common_private->share_resources(NOW);
-    DEBUG2("Resource [%s] : next action end = %f",resource->common_public->name,
-	   resource_next_action_end);
-    if (((min < 0.0) || (resource_next_action_end < min))
-	&& (resource_next_action_end >= 0.0))
-      min = resource_next_action_end;
+  xbt_dynar_foreach(model_list, iter, model) {
+    DEBUG1("Running for Resource [%s]", model->name);
+    model_next_action_end = model->model_private->share_resources(NOW);
+    DEBUG2("Resource [%s] : next action end = %f",
+           model->name, model_next_action_end);
+    if (((min < 0.0) || (model_next_action_end < min))
+        && (model_next_action_end >= 0.0))
+      min = model_next_action_end;
   }
   DEBUG1("Next action end : %f", min);
 
-  if (min < 0.0)
-    return -1.0;
-
   DEBUG0("Looking for next event");
   while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
-    DEBUG1("Next event : %f",next_event_date);
-    if (next_event_date > NOW + min)
+    DEBUG1("Next TRACE event : %f", next_event_date);
+    if ((min != -1.0) && (next_event_date > NOW + min))
       break;
-    DEBUG0("Updating resources");
+    DEBUG0("Updating models");
     while ((event =
-	    tmgr_history_get_next_event_leq(history, next_event_date,
-					    &value,
-					    (void **) &resource_obj))) {
-      if (resource_obj->resource->common_private->
-	  resource_used(resource_obj)) {
-	min = next_event_date - NOW;
-	DEBUG1("This event will modify resource state. Next event set to %f", min);
+            tmgr_history_get_next_event_leq(history, next_event_date,
+                                            &value, (void **) &resource))) {
+      if (resource->model->model_private->resource_used(resource)) {
+        min = next_event_date - NOW;
+        DEBUG1
+          ("This event will modify model state. Next event set to %f", min);
       }
-      /* update state of resource_obj according to new value. Does not touch lmm.
+      /* update state of model_obj according to new value. Does not touch lmm.
          It will be modified if needed when updating actions */
-      resource_obj->resource->common_private->
-	  update_resource_state(resource_obj, event, value);
+      DEBUG2("Calling update_resource_state for resource %s with min %lf",
+             resource->model->name, min);
+      resource->model->model_private->update_resource_state(resource, event,
+                                                            value, NOW + min);
     }
   }
 
+  /* FIXME: Moved this test to here to avoid stoping simulation if there are actions running on cpus and all cpus are with availability = 0. 
+   * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
+   * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
+  if (min < 0.0)
+    return -1.0;
+
   DEBUG1("Duration set to %f", min);
 
   NOW = NOW + min;
 
-  xbt_dynar_foreach(resource_list, i, resource) {
-    resource->common_private->update_actions_state(NOW, min);
-  }
+  xbt_dynar_foreach(model_list, iter, model)
+    model->model_private->update_actions_state(NOW, min);
 
   return min;
 }