X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/93bc0226e3b100b84273204a75a5bbd203ebc880..dd22867177c86db2e9d0b76852cb09e044b1c0c8:/src/surf/cpu_cas01.c

diff --git a/src/surf/cpu_cas01.c b/src/surf/cpu_cas01.c
index dcc738c293..d85dc7374a 100644
--- a/src/surf/cpu_cas01.c
+++ b/src/surf/cpu_cas01.c
@@ -6,13 +6,13 @@
 
 #include "surf_private.h"
 #include "surf/surf_resource.h"
+#include "maxmin_private.h"
+#include "simgrid/sg_config.h"
+#include "surf/cpu_cas01_private.h"
 
-surf_model_t surf_cpu_model = NULL;
-lmm_system_t cpu_maxmin_system = NULL;
-e_UM_t cpu_update_mechanism = UM_UNDEFINED;
-static xbt_swag_t cpu_modified_cpu = NULL;
-static xbt_heap_t cpu_action_heap = NULL;
-extern int sg_maxmin_selective_update;
+/* the model objects for physical machines and virtual machines */
+surf_model_t surf_cpu_model_pm = NULL;
+surf_model_t surf_cpu_model_vm = NULL;
 
 #undef GENERIC_LMM_ACTION
 #undef GENERIC_ACTION
@@ -23,54 +23,37 @@ extern int sg_maxmin_selective_update;
 
 typedef struct surf_action_cpu_cas01 {
   s_surf_action_lmm_t generic_lmm_action;
-  s_xbt_swag_hookup_t cpu_list_hookup;
-  int index_heap;
-  void *cpu;
 } s_surf_action_cpu_Cas01_t, *surf_action_cpu_Cas01_t;
 
-typedef struct cpu_Cas01 {
-  s_surf_resource_t generic_resource;
-  s_xbt_swag_hookup_t modified_cpu_hookup;
-  double power_peak;
-  double power_scale;
-  tmgr_trace_event_t power_event;
-  int core;
-  e_surf_resource_state_t state_current;
-  tmgr_trace_event_t state_event;
-  lmm_constraint_t constraint;
-  xbt_swag_t action_set;
-  double last_update;
-} s_cpu_Cas01_t, *cpu_Cas01_t;
-
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf,
                                 "Logging specific to the SURF CPU IMPROVED module");
 
-
-
 static xbt_swag_t
     cpu_running_action_set_that_does_not_need_being_checked = NULL;
 
-static void* cpu_create_resource(const char *name, double power_peak,
+
+void *cpu_cas01_create_resource(const char *name, double power_peak,
                                  double power_scale,
                                  tmgr_trace_t power_trace,
                                  int core,
                                  e_surf_resource_state_t state_initial,
                                  tmgr_trace_t state_trace,
-                                 xbt_dict_t cpu_properties)
+                                 xbt_dict_t cpu_properties,
+                                 surf_model_t cpu_model)
 {
   cpu_Cas01_t cpu = NULL;
-  s_surf_action_cpu_Cas01_t action;
 
-  xbt_assert(!surf_cpu_resource_by_name(name),
-              "Host '%s' declared several times in the platform file",
-              name);
+  xbt_assert(!surf_cpu_resource_priv(surf_cpu_resource_by_name(name)),
+             "Host '%s' declared several times in the platform file",
+             name);
   cpu = (cpu_Cas01_t) surf_resource_new(sizeof(s_cpu_Cas01_t),
-          surf_cpu_model, name,cpu_properties);
+                                        cpu_model, name,
+                                        cpu_properties);
   cpu->power_peak = power_peak;
   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
   cpu->power_scale = power_scale;
   cpu->core = core;
-  xbt_assert(core>0,"Invalid number of cores %d",core);
+  xbt_assert(core > 0, "Invalid number of cores %d", core);
 
   if (power_trace)
     cpu->power_event =
@@ -82,27 +65,28 @@ static void* cpu_create_resource(const char *name, double power_peak,
         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
 
   cpu->constraint =
-      lmm_constraint_new(cpu_maxmin_system, cpu,
+      lmm_constraint_new(cpu_model->model_private->maxmin_system, cpu,
                          cpu->core * cpu->power_scale * cpu->power_peak);
 
   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
-  if(cpu_update_mechanism == UM_LAZY)
-    cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
 
-  return cpu;
+  return xbt_lib_get_elm_or_null(host_lib, name);;
 }
 
 
 static void parse_cpu_init(sg_platf_host_cbarg_t host)
 {
-	cpu_create_resource(host->id,
-			  host->power_peak,
-			  host->power_scale,
-			  host->power_trace,
-			  host->core_amount,
-			  host->initial_state,
-			  host->state_trace,
-			  host->properties);
+  /* This function is called when a platform file is parsed. Physical machines
+   * are defined there. Thus, we use the cpu model object for the physical
+   * machine layer. */
+  cpu_cas01_create_resource(host->id,
+                      host->power_peak,
+                      host->power_scale,
+                      host->power_trace,
+                      host->core_amount,
+                      host->initial_state,
+                      host->state_trace, host->properties,
+                      surf_cpu_model_pm);
 }
 
 static void cpu_add_traces_cpu(void)
@@ -138,7 +122,7 @@ static void cpu_add_traces_cpu(void)
   }
 }
 
-static void cpu_define_callbacks()
+static void cpu_define_callbacks_cas01()
 {
   sg_platf_host_add_cb(parse_cpu_init);
   sg_platf_postparse_add_cb(cpu_add_traces_cpu);
@@ -146,286 +130,66 @@ static void cpu_define_callbacks()
 
 static int cpu_resource_used(void *resource)
 {
-  return lmm_constraint_used(cpu_maxmin_system,
+  surf_model_t cpu_model = ((surf_resource_t) resource)->model;
+
+  return lmm_constraint_used(cpu_model->model_private->maxmin_system,
                              ((cpu_Cas01_t) resource)->constraint);
 }
 
-static int cpu_action_unref(surf_action_t action)
+static double cpu_share_resources_lazy(surf_model_t cpu_model, double now)
 {
-  action->refcount--;
-  if (!action->refcount) {
-    xbt_swag_remove(action, action->state_set);
-    if (((surf_action_lmm_t) action)->variable)
-      lmm_variable_free(cpu_maxmin_system,
-                        ((surf_action_lmm_t) action)->variable);
-    if(cpu_update_mechanism == UM_LAZY){
-    /* remove from heap */
-    xbt_heap_remove(cpu_action_heap,
-                    ((surf_action_cpu_Cas01_t) action)->index_heap);
-    xbt_swag_remove(action,
-                    ((cpu_Cas01_t) ACTION_GET_CPU(action))->action_set);
-    xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
-    }
-#ifdef HAVE_TRACING
-    xbt_free(action->category);
-#endif
-    surf_action_free(&action);
-    return 1;
-  }
-  return 0;
+  return generic_share_resources_lazy(now, cpu_model);
 }
 
-static void cpu_action_cancel(surf_action_t action)
+static double cpu_share_resources_full(surf_model_t cpu_model, double now)
 {
-  surf_action_state_set(action, SURF_ACTION_FAILED);
-  if(cpu_update_mechanism == UM_LAZY){
-  xbt_heap_remove(cpu_action_heap,
-                  ((surf_action_cpu_Cas01_t) action)->index_heap);
-  xbt_swag_remove(action,
-                  ((cpu_Cas01_t) ACTION_GET_CPU(action))->action_set);
-  }
-  return;
+  s_surf_action_cpu_Cas01_t action;
+  return generic_maxmin_share_resources(cpu_model->states.
+                                        running_action_set,
+                                        xbt_swag_offset(action,
+                                                        generic_lmm_action.
+                                                        variable),
+                                        cpu_model->model_private->maxmin_system, lmm_solve);
 }
 
-static void cpu_cpu_action_state_set(surf_action_t action,
-                                        e_surf_action_state_t state)
+static void cpu_update_actions_state_lazy(surf_model_t cpu_model, double now, double delta)
 {
-/*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
-/*     if(((surf_action_lmm_t)action)->variable) { */
-/*       lmm_variable_disable(cpu_maxmin_system, ((surf_action_lmm_t)action)->variable); */
-/*       ((surf_action_lmm_t)action)->variable = NULL; */
-/*     } */
-
-  surf_action_state_set(action, state);
-  return;
+  generic_update_actions_state_lazy(now, delta, cpu_model);
 }
 
-static void cpu_update_remains(cpu_Cas01_t cpu, double now)
+static void cpu_update_actions_state_full(surf_model_t cpu_model, double now, double delta)
 {
-  surf_action_cpu_Cas01_t action;
-
-  if (cpu->last_update >= now)
-    return;
-  xbt_swag_foreach(action, cpu->action_set) {
-    if (GENERIC_ACTION(action).state_set !=
-        surf_cpu_model->states.running_action_set)
-      continue;
-
-    /* bogus priority, skip it */
-    if (GENERIC_ACTION(action).priority <= 0)
-      continue;
-
-    if (GENERIC_ACTION(action).remains > 0) {
-      double_update(&(GENERIC_ACTION(action).remains),
-                    lmm_variable_getvalue(GENERIC_LMM_ACTION
-                                          (action).variable) * (now -
-                                                                cpu->last_update));
-#ifdef HAVE_TRACING
-      if (TRACE_is_enabled()) {
-        TRACE_surf_host_set_utilization(cpu->generic_resource.name,
-                                        action->
-                                        generic_lmm_action.generic_action.
-                                        data, (surf_action_t) action,
-                                        lmm_variable_getvalue
-                                        (GENERIC_LMM_ACTION
-                                         (action).variable),
-                                        cpu->last_update,
-                                        now - cpu->last_update);
-      }
-#endif
-      XBT_DEBUG("Update action(%p) remains %lf", action,
-             GENERIC_ACTION(action).remains);
-    }
-  }
-  cpu->last_update = now;
-}
-
-static double cpu_share_resources_lazy(double now)
-{
-  surf_action_cpu_Cas01_t action;
-  double min;
-  double value;
-  cpu_Cas01_t cpu, cpu_next;
-
-  xbt_swag_foreach(cpu, cpu_modified_cpu)
-      cpu_update_remains(cpu, now);
-
-  lmm_solve(cpu_maxmin_system);
-
-  xbt_swag_foreach_safe(cpu, cpu_next, cpu_modified_cpu) {
-    xbt_swag_foreach(action, cpu->action_set) {
-      if (GENERIC_ACTION(action).state_set !=
-          surf_cpu_model->states.running_action_set)
-        continue;
-
-      /* bogus priority, skip it */
-      if (GENERIC_ACTION(action).priority <= 0)
-        continue;
-
-      min = -1;
-      value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
-      if (value > 0) {
-        if (GENERIC_ACTION(action).remains > 0) {
-          value = GENERIC_ACTION(action).remains / value;
-          min = now + value;
-        } else {
-          value = 0.0;
-          min = now;
-        }
-      }
-
-      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
-          && (min == -1
-              || GENERIC_ACTION(action).start +
-              GENERIC_ACTION(action).max_duration < min))
-        min =
-            GENERIC_ACTION(action).start +
-            GENERIC_ACTION(action).max_duration;
-
-      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
-             GENERIC_ACTION(action).start, now + value,
-             GENERIC_ACTION(action).max_duration);
-
-      if (action->index_heap >= 0) {
-        surf_action_cpu_Cas01_t heap_act =
-            xbt_heap_remove(cpu_action_heap, action->index_heap);
-        if (heap_act != action)
-          DIE_IMPOSSIBLE;
-      }
-      if (min != -1) {
-        xbt_heap_push(cpu_action_heap, action, min);
-        XBT_DEBUG("Insert at heap action(%p) min %lf", action, min);
-      }
-    }
-    xbt_swag_remove(cpu, cpu_modified_cpu);
-  }
-  return xbt_heap_size(cpu_action_heap) >
-      0 ? xbt_heap_maxkey(cpu_action_heap) - now : -1;
-}
-
-static double cpu_share_resources_full(double now) {
-  surf_action_cpu_Cas01_t action;
-  return generic_maxmin_share_resources(surf_cpu_model->states.running_action_set,
-      xbt_swag_offset(*action, generic_lmm_action.variable),
-      cpu_maxmin_system, lmm_solve);
-}
-
-static void cpu_update_actions_state_lazy(double now, double delta)
-{
-  surf_action_cpu_Cas01_t action;
-  while ((xbt_heap_size(cpu_action_heap) > 0)
-         && (double_equals(xbt_heap_maxkey(cpu_action_heap), now))) {
-    action = xbt_heap_pop(cpu_action_heap);
-    XBT_DEBUG("Action %p: finish", action);
-    GENERIC_ACTION(action).finish = surf_get_clock();
-    /* set the remains to 0 due to precision problems when updating the remaining amount */
-#ifdef HAVE_TRACING
-    if (TRACE_is_enabled()) {
-      cpu_Cas01_t cpu = ((cpu_Cas01_t)(action->cpu));
-      TRACE_surf_host_set_utilization(cpu->generic_resource.name,
-          GENERIC_LMM_ACTION(action).generic_action.data,
-          (surf_action_t) action,
-          lmm_variable_getvalue (GENERIC_LMM_ACTION(action).variable),
-          cpu->last_update,
-          now - cpu->last_update);
-    }
-#endif
-    GENERIC_ACTION(action).remains = 0;
-    cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
-    cpu_update_remains(action->cpu, surf_get_clock());
-  }
-#ifdef HAVE_TRACING
-  if (TRACE_is_enabled()) {
-    //defining the last timestamp that we can safely dump to trace file
-    //without losing the event ascending order (considering all CPU's)
-    void **data;
-    cpu_Cas01_t cpu;
-    xbt_lib_cursor_t cursor;
-    char *key;
-    double smaller = -1;
-    xbt_lib_foreach(host_lib, cursor, key, data){
-      if(data[SURF_CPU_LEVEL]){
-        cpu = data[SURF_CPU_LEVEL];
-        if (smaller < 0){
-          smaller = cpu->last_update;
-          continue;
-        }
-        if (cpu->last_update < smaller){
-          smaller = cpu->last_update;
-        }
-      }
-    }
-    if (smaller > 0) {
-      TRACE_last_timestamp_to_dump = smaller;
-    }
-  }
-#endif
-  return;
-}
-
-static void cpu_update_actions_state_full(double now, double delta)
-{
-  surf_action_cpu_Cas01_t action = NULL;
-  surf_action_cpu_Cas01_t next_action = NULL;
-  xbt_swag_t running_actions = surf_cpu_model->states.running_action_set;
-  xbt_swag_foreach_safe(action, next_action, running_actions) {
-#ifdef HAVE_TRACING
-    if (TRACE_is_enabled()) {
-      cpu_Cas01_t x =
-        lmm_constraint_id(lmm_get_cnst_from_var
-                          (cpu_maxmin_system, GENERIC_LMM_ACTION(action).variable, 0));
-
-      TRACE_surf_host_set_utilization(x->generic_resource.name,
-                                      GENERIC_ACTION(action).data,
-                                      (surf_action_t) action,
-                                      lmm_variable_getvalue
-                                      (GENERIC_LMM_ACTION(action).variable), now - delta,
-                                      delta);
-      TRACE_last_timestamp_to_dump = now-delta;
-    }
-#endif
-    double_update(&(GENERIC_ACTION(action).remains),
-                  lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * delta);
-    if (GENERIC_LMM_ACTION(action).generic_action.max_duration != NO_MAX_DURATION)
-      double_update(&(GENERIC_ACTION(action).max_duration), delta);
-    if ((GENERIC_ACTION(action).remains <= 0) &&
-        (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
-      GENERIC_ACTION(action).finish = surf_get_clock();
-      cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
-    } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
-               (GENERIC_ACTION(action).max_duration <= 0)) {
-      GENERIC_ACTION(action).finish = surf_get_clock();
-      cpu_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
-    }
-  }
-
-  return;
+  generic_update_actions_state_full(now, delta, cpu_model);
 }
 
 static void cpu_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)
 {
   cpu_Cas01_t cpu = id;
   lmm_variable_t var = NULL;
   lmm_element_t elem = NULL;
+  surf_model_t cpu_model = ((surf_resource_t) cpu)->model;
+
+  surf_watched_hosts();
 
   if (event_type == cpu->power_event) {
     cpu->power_scale = value;
-    lmm_update_constraint_bound(cpu_maxmin_system, cpu->constraint,
-                                cpu->core * cpu->power_scale * cpu->power_peak);
+    lmm_update_constraint_bound(cpu_model->model_private->maxmin_system, cpu->constraint,
+                                cpu->core * cpu->power_scale *
+                                cpu->power_peak);
 #ifdef HAVE_TRACING
     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
-                              cpu->core * cpu->power_scale * cpu->power_peak);
+                              cpu->core * cpu->power_scale *
+                              cpu->power_peak);
 #endif
     while ((var = lmm_get_var_from_cnst
-            (cpu_maxmin_system, cpu->constraint, &elem))) {
-    	surf_action_cpu_Cas01_t action = lmm_variable_id(var);
-    	lmm_update_variable_bound(cpu_maxmin_system, GENERIC_LMM_ACTION(action).variable,
-                                  cpu->power_scale * cpu->power_peak);
+            (cpu_model->model_private->maxmin_system, cpu->constraint, &elem))) {
+      surf_action_cpu_Cas01_t action = lmm_variable_id(var);
+      lmm_update_variable_bound(cpu_model->model_private->maxmin_system,
+                                GENERIC_LMM_ACTION(action).variable,
+                                cpu->power_scale * cpu->power_peak);
     }
-    if(cpu_update_mechanism == UM_LAZY)
-      xbt_swag_insert(cpu, cpu_modified_cpu);
     if (tmgr_trace_event_free(event_type))
       cpu->power_event = NULL;
   } else if (event_type == cpu->state_event) {
@@ -433,13 +197,10 @@ static void cpu_update_resource_state(void *id,
       cpu->state_current = SURF_RESOURCE_ON;
     else {
       lmm_constraint_t cnst = cpu->constraint;
-      lmm_variable_t var = NULL;
-      lmm_element_t elem = NULL;
 
       cpu->state_current = SURF_RESOURCE_OFF;
 
-      while ((var =
-              lmm_get_var_from_cnst(cpu_maxmin_system, cnst, &elem))) {
+      while ((var = lmm_get_var_from_cnst(cpu_model->model_private->maxmin_system, cnst, &elem))) {
         surf_action_t action = lmm_variable_id(var);
 
         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
@@ -447,7 +208,7 @@ static void cpu_update_resource_state(void *id,
             surf_action_state_get(action) ==
             SURF_ACTION_NOT_IN_THE_SYSTEM) {
           action->finish = date;
-          cpu_cpu_action_state_set(action, SURF_ACTION_FAILED);
+          surf_action_state_set(action, SURF_ACTION_FAILED);
         }
       }
     }
@@ -464,27 +225,28 @@ static void cpu_update_resource_state(void *id,
 static surf_action_t cpu_execute(void *cpu, double size)
 {
   surf_action_cpu_Cas01_t action = NULL;
-  cpu_Cas01_t CPU = cpu;
+  cpu_Cas01_t CPU = surf_cpu_resource_priv(cpu);
+  surf_model_t cpu_model = ((surf_resource_t) CPU)->model;
 
   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
   action =
       surf_action_new(sizeof(s_surf_action_cpu_Cas01_t), size,
-                      surf_cpu_model,
+                      cpu_model,
                       CPU->state_current != SURF_RESOURCE_ON);
 
   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
                                                    calloc but it seems to help valgrind... */
 
   GENERIC_LMM_ACTION(action).variable =
-      lmm_variable_new(cpu_maxmin_system, action,
-                       GENERIC_ACTION(action).priority, CPU->power_scale * CPU->power_peak, 1);
-  if(cpu_update_mechanism == UM_LAZY){
-    action->index_heap = -1;
-    action->cpu = CPU;
-    xbt_swag_insert(CPU, cpu_modified_cpu);
-    xbt_swag_insert(action, CPU->action_set);
+      lmm_variable_new(cpu_model->model_private->maxmin_system, action,
+                       GENERIC_ACTION(action).priority,
+                       CPU->power_scale * CPU->power_peak, 1);
+  if (cpu_model->model_private->update_mechanism == UM_LAZY) {
+    GENERIC_LMM_ACTION(action).index_heap = -1;
+    GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
+    GENERIC_LMM_ACTION(action).last_value = 0.0;
   }
-  lmm_expand(cpu_maxmin_system, CPU->constraint,
+  lmm_expand(cpu_model->model_private->maxmin_system, CPU->constraint,
              GENERIC_LMM_ACTION(action).variable, 1.0);
   XBT_OUT();
   return (surf_action_t) action;
@@ -493,12 +255,15 @@ static surf_action_t cpu_execute(void *cpu, double size)
 static surf_action_t cpu_action_sleep(void *cpu, double duration)
 {
   surf_action_cpu_Cas01_t action = NULL;
+  cpu_Cas01_t CPU = surf_cpu_resource_priv(cpu);
+  surf_model_t cpu_model = ((surf_resource_t) CPU)->model;
 
   if (duration > 0)
     duration = MAX(duration, MAXMIN_PRECISION);
 
-  XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
+  XBT_IN("(%s,%g)", surf_resource_name(surf_cpu_resource_priv(cpu)), duration);
   action = (surf_action_cpu_Cas01_t) cpu_execute(cpu, 1.0);
+  // FIXME: sleep variables should not consume 1.0 in lmm_expand
   GENERIC_ACTION(action).max_duration = duration;
   GENERIC_LMM_ACTION(action).suspended = 2;
   if (duration == NO_MAX_DURATION) {
@@ -510,207 +275,140 @@ static surf_action_t cpu_action_sleep(void *cpu, double duration)
     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
   }
 
-  lmm_update_variable_weight(cpu_maxmin_system,
+  lmm_update_variable_weight(cpu_model->model_private->maxmin_system,
                              GENERIC_LMM_ACTION(action).variable, 0.0);
-  if(cpu_update_mechanism == UM_LAZY)
-    xbt_swag_insert(cpu, cpu_modified_cpu);
-  XBT_OUT();
-  return (surf_action_t) action;
-}
-
-static void cpu_action_suspend(surf_action_t action)
-{
-  XBT_IN("(%p)", action);
-  if (((surf_action_lmm_t) action)->suspended != 2) {
-    lmm_update_variable_weight(cpu_maxmin_system,
-                               ((surf_action_lmm_t) action)->variable,
-                               0.0);
-    ((surf_action_lmm_t) action)->suspended = 1;
-    if(cpu_update_mechanism == UM_LAZY){
-      xbt_heap_remove(cpu_action_heap,
-                      ((surf_action_cpu_Cas01_t) action)->index_heap);
-      xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
-    }
-  }
-  XBT_OUT();
-}
-
-static void cpu_action_resume(surf_action_t action)
-{
-
-  XBT_IN("(%p)", action);
-  if (((surf_action_lmm_t) action)->suspended != 2) {
-    lmm_update_variable_weight(cpu_maxmin_system,
-                               ((surf_action_lmm_t) action)->variable,
-                               action->priority);
-    ((surf_action_lmm_t) action)->suspended = 0;
-    if(cpu_update_mechanism == UM_LAZY)
-      xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
+  if (cpu_model->model_private->update_mechanism == UM_LAZY) {     // remove action from the heap
+    surf_action_lmm_heap_remove(cpu_model->model_private->action_heap,(surf_action_lmm_t)action);
+    // this is necessary for a variable with weight 0 since such
+    // variables are ignored in lmm and we need to set its max_duration
+    // correctly at the next call to share_resources
+    xbt_swag_insert_at_head(action, cpu_model->model_private->modified_set);
   }
-  XBT_OUT();
-}
-
-static int cpu_action_is_suspended(surf_action_t action)
-{
-  return (((surf_action_lmm_t) action)->suspended == 1);
-}
-
-static void cpu_action_set_max_duration(surf_action_t action,
-                                           double duration)
-{
-  XBT_IN("(%p,%g)", action, duration);
-
-  action->max_duration = duration;
-  /* insert cpu in modified_cpu set to notice the max duration change */
-  if(cpu_update_mechanism == UM_LAZY)
-    xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
-  XBT_OUT();
-}
-
-static void cpu_action_set_priority(surf_action_t action,
-                                       double priority)
-{
-  XBT_IN("(%p,%g)", action, priority);
-  action->priority = priority;
-  lmm_update_variable_weight(cpu_maxmin_system,
-                             ((surf_action_lmm_t) action)->variable,
-                             priority);
-
-  if(cpu_update_mechanism == UM_LAZY)
-    xbt_swag_insert(ACTION_GET_CPU(action), cpu_modified_cpu);
-  XBT_OUT();
-}
 
-#ifdef HAVE_TRACING
-static void cpu_action_set_category(surf_action_t action,
-                                       const char *category)
-{
-  XBT_IN("(%p,%s)", action, category);
-  action->category = xbt_strdup (category);
-  XBT_OUT();
-}
-#endif
-
-static double cpu_action_get_remains(surf_action_t action)
-{
-  XBT_IN("(%p)", action);
-  /* update remains before return it */
-  if(cpu_update_mechanism == UM_LAZY)
-    cpu_update_remains(ACTION_GET_CPU(action), surf_get_clock());
-  return action->remains;
   XBT_OUT();
+  return (surf_action_t) action;
 }
 
 static e_surf_resource_state_t cpu_get_state(void *cpu)
 {
-  return ((cpu_Cas01_t) cpu)->state_current;
+  return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->state_current;
 }
 
 static double cpu_get_speed(void *cpu, double load)
 {
-  return load * (((cpu_Cas01_t) cpu)->power_peak);
+  return load * ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_peak;
 }
 
 static double cpu_get_available_speed(void *cpu)
 {
   /* number between 0 and 1 */
-  return ((cpu_Cas01_t) cpu)->power_scale;
+  return ((cpu_Cas01_t)surf_cpu_resource_priv(cpu))->power_scale;
 }
 
-static void cpu_action_update_index_heap(void *action, int i)
+static void cpu_finalize(surf_model_t cpu_model)
 {
-  ((surf_action_cpu_Cas01_t) action)->index_heap = i;
-}
+  lmm_system_free(cpu_model->model_private->maxmin_system);
+  cpu_model->model_private->maxmin_system = NULL;
 
-static void cpu_finalize(void)
-{
-  void **cpu;
-  xbt_lib_cursor_t cursor;
-  char *key;
-
-  xbt_lib_foreach(host_lib, cursor, key, cpu){
-    if(cpu[SURF_CPU_LEVEL])
-    {
-        cpu_Cas01_t CPU = cpu[SURF_CPU_LEVEL];
-        xbt_swag_free(CPU->action_set);
-    }
-  }
+  if (cpu_model->model_private->action_heap)
+    xbt_heap_free(cpu_model->model_private->action_heap);
+  xbt_swag_free(cpu_model->model_private->modified_set);
 
-  lmm_system_free(cpu_maxmin_system);
-  cpu_maxmin_system = NULL;
+  surf_model_exit(cpu_model);
+  cpu_model = NULL;
 
-  surf_model_exit(surf_cpu_model);
-  surf_cpu_model = NULL;
-
-  xbt_swag_free
-      (cpu_running_action_set_that_does_not_need_being_checked);
+  xbt_swag_free(cpu_running_action_set_that_does_not_need_being_checked);
   cpu_running_action_set_that_does_not_need_being_checked = NULL;
-  if(cpu_action_heap)  xbt_heap_free(cpu_action_heap);
-  if(cpu_modified_cpu) xbt_swag_free(cpu_modified_cpu);
 }
 
-static void surf_cpu_model_init_internal(const char* name)
+static surf_model_t surf_cpu_model_init_cas01(void)
 {
   s_surf_action_t action;
-  s_cpu_Cas01_t cpu;
-
-  surf_cpu_model = surf_model_init();
+  s_surf_action_cpu_Cas01_t comp;
+
+  char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
+  int select =
+      xbt_cfg_get_int(_sg_cfg_set, "cpu/maxmin_selective_update");
+
+  surf_model_t cpu_model = surf_model_init();
+
+  if (!strcmp(optim, "Full")) {
+    cpu_model->model_private->update_mechanism = UM_FULL;
+    cpu_model->model_private->selective_update = select;
+  } else if (!strcmp(optim, "Lazy")) {
+    cpu_model->model_private->update_mechanism = UM_LAZY;
+    cpu_model->model_private->selective_update = 1;
+    xbt_assert((select == 1)
+               ||
+               (xbt_cfg_is_default_value
+                (_sg_cfg_set, "cpu/maxmin_selective_update")),
+               "Disabling selective update while using the lazy update mechanism is dumb!");
+  } else {
+    xbt_die("Unsupported optimization (%s) for this model", optim);
+  }
 
   cpu_running_action_set_that_does_not_need_being_checked =
       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 
-  surf_cpu_model->name = name;
-
-  surf_cpu_model->action_unref = cpu_action_unref;
-  surf_cpu_model->action_cancel = cpu_action_cancel;
-  surf_cpu_model->action_state_set = cpu_cpu_action_state_set;
-
-  surf_cpu_model->model_private->resource_used = cpu_resource_used;
-
-  if(cpu_update_mechanism == UM_LAZY) {
-    surf_cpu_model->model_private->share_resources = cpu_share_resources_lazy;
-    surf_cpu_model->model_private->update_actions_state = cpu_update_actions_state_lazy;
-  } else if (cpu_update_mechanism == UM_FULL) {
-    surf_cpu_model->model_private->share_resources = cpu_share_resources_full;
-    surf_cpu_model->model_private->update_actions_state = cpu_update_actions_state_full;
+  cpu_model->name = "cpu";
+  cpu_model->type = SURF_MODEL_TYPE_CPU;
+
+  cpu_model->action_unref = surf_action_unref;
+  cpu_model->action_cancel = surf_action_cancel;
+  cpu_model->action_state_set = surf_action_state_set;
+
+  cpu_model->model_private->resource_used = cpu_resource_used;
+
+  if (cpu_model->model_private->update_mechanism == UM_LAZY) {
+    cpu_model->model_private->share_resources =
+        cpu_share_resources_lazy;
+    cpu_model->model_private->update_actions_state =
+        cpu_update_actions_state_lazy;
+  } else if (cpu_model->model_private->update_mechanism == UM_FULL) {
+    cpu_model->model_private->share_resources =
+        cpu_share_resources_full;
+    cpu_model->model_private->update_actions_state =
+        cpu_update_actions_state_full;
   } else
-    xbt_die("Invalid update mechanism!");
+    xbt_die("Invalid cpu update mechanism!");
 
-  surf_cpu_model->model_private->update_resource_state =
+  cpu_model->model_private->update_resource_state =
       cpu_update_resource_state;
-  surf_cpu_model->model_private->finalize = cpu_finalize;
-
-  surf_cpu_model->suspend = cpu_action_suspend;
-  surf_cpu_model->resume = cpu_action_resume;
-  surf_cpu_model->is_suspended = cpu_action_is_suspended;
-  surf_cpu_model->set_max_duration = cpu_action_set_max_duration;
-  surf_cpu_model->set_priority = cpu_action_set_priority;
+  cpu_model->model_private->finalize = cpu_finalize;
+
+  cpu_model->suspend = surf_action_suspend;
+  cpu_model->resume = surf_action_resume;
+  cpu_model->is_suspended = surf_action_is_suspended;
+  cpu_model->set_max_duration = surf_action_set_max_duration;
+  cpu_model->set_priority = surf_action_set_priority;
+  cpu_model->set_bound = surf_action_set_bound;
 #ifdef HAVE_TRACING
-  surf_cpu_model->set_category = cpu_action_set_category;
+  cpu_model->set_category = surf_action_set_category;
 #endif
-  surf_cpu_model->get_remains = cpu_action_get_remains;
+  cpu_model->get_remains = surf_action_get_remains;
 
-  surf_cpu_model->extension.cpu.execute = cpu_execute;
-  surf_cpu_model->extension.cpu.sleep = cpu_action_sleep;
+  cpu_model->extension.cpu.execute = cpu_execute;
+  cpu_model->extension.cpu.sleep = cpu_action_sleep;
 
-  surf_cpu_model->extension.cpu.get_state = cpu_get_state;
-  surf_cpu_model->extension.cpu.get_speed = cpu_get_speed;
-  surf_cpu_model->extension.cpu.get_available_speed =
+  cpu_model->extension.cpu.get_state = cpu_get_state;
+  cpu_model->extension.cpu.get_speed = cpu_get_speed;
+  cpu_model->extension.cpu.get_available_speed =
       cpu_get_available_speed;
-  surf_cpu_model->extension.cpu.create_resource = cpu_create_resource;
-  surf_cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
+  cpu_model->extension.cpu.add_traces = cpu_add_traces_cpu;
 
-  if (!cpu_maxmin_system) {
-    sg_maxmin_selective_update = 1;
-    cpu_maxmin_system = lmm_system_new();
+  if (!cpu_model->model_private->maxmin_system) {
+    cpu_model->model_private->maxmin_system = lmm_system_new(cpu_model->model_private->selective_update);
   }
-  if(cpu_update_mechanism == UM_LAZY){
-    cpu_action_heap = xbt_heap_new(8, NULL);
-    xbt_heap_set_update_callback(cpu_action_heap,
-                                 cpu_action_update_index_heap);
-    cpu_modified_cpu =
-        xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
+  if (cpu_model->model_private->update_mechanism == UM_LAZY) {
+    cpu_model->model_private->action_heap = xbt_heap_new(8, NULL);
+    xbt_heap_set_update_callback(cpu_model->model_private->action_heap,
+        surf_action_lmm_update_index_heap);
+    cpu_model->model_private->modified_set =
+        xbt_swag_new(xbt_swag_offset(comp, generic_lmm_action.action_list_hookup));
+    cpu_model->model_private->maxmin_system->keep_track = cpu_model->model_private->modified_set;
   }
+
+  return cpu_model;
 }
 
 /*********************************************************************/
@@ -729,31 +427,38 @@ static void surf_cpu_model_init_internal(const char* name)
 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 /* } */
 
-void surf_cpu_model_init_Cas01()
+
+void surf_cpu_model_init_Cas01(void)
 {
-  char *optim = xbt_cfg_get_string(_surf_cfg_set, "cpu/optim");
-  char *model = xbt_cfg_get_string(_surf_cfg_set, "cpu/model");
+  char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
 
-  if(!strcmp(model,"Cas01_fullupdate")) {
-    XBT_WARN("[*Deprecated*. Use --cfg=cpu/model:Cas01 with option --cfg=cpu/optim:Full instead.]");
-  } else if(!strcmp(model,"CpuTI")) {
-    XBT_WARN("[*Deprecated*. Use --cfg=cpu/model:Cas01 with option --cfg=cpu/optim:TI instead.]");
-  }
+  xbt_assert(!surf_cpu_model_pm);
+  xbt_assert(!surf_cpu_model_vm);
 
-  if(!strcmp(optim,"Full")) {
-    cpu_update_mechanism = UM_FULL;
-  } else if (!strcmp(optim,"Lazy")) {
-    cpu_update_mechanism = UM_LAZY;
-  } else if (!strcmp(optim,"TI")) {
-    surf_cpu_model_init_ti();
-    return;
+  if (strcmp(optim, "TI") == 0) {
+    /* FIXME: do we have to supprot TI? for VM */
+    surf_cpu_model_pm = surf_cpu_model_init_ti();
+    XBT_INFO("TI model is used (it will crashed since this is the hypervisor branch)");
   } else {
-    xbt_die("Unsupported optimization (%s) for this model",optim);
+    surf_cpu_model_pm  = surf_cpu_model_init_cas01();
+    surf_cpu_model_vm  = surf_cpu_model_init_cas01();
+
+    /* cpu_model is registered only to model_list, and not to
+     * model_list_invoke. The shared_resource callback function will be called
+     * from that of the workstation model. */
+    xbt_dynar_push(model_list, &surf_cpu_model_pm);
+    xbt_dynar_push(model_list, &surf_cpu_model_vm);
+
+    cpu_define_callbacks_cas01();
   }
+}
 
-  if (surf_cpu_model)
-    return;
-  surf_cpu_model_init_internal("CPU");
-  cpu_define_callbacks();
-  xbt_dynar_push(model_list, &surf_cpu_model);
+/* TODO: do we address nested virtualization later? */
+#if 0
+surf_model_t cpu_model_cas01(int level){
+	// TODO this table should be allocated
+	if(!surf_cpu_model[level])
+	 // allocate it
+	return surf_cpu_model[level];
 }
+#endif