+ /* 1. Now we know how many resource should be assigned to each virtual
+ * machine. We update constraints of the virtual machine layer.
+ *
+ *
+ * If we have two virtual machine (VM1 and VM2) on a physical machine (PM1).
+ * X1 + X2 = C (Equation 1)
+ * where
+ * the resource share of VM1: X1
+ * the resource share of VM2: X2
+ * the capacity of PM1: C
+ *
+ * Then, if we have two process (P1 and P2) on VM1.
+ * X1_1 + X1_2 = X1 (Equation 2)
+ * where
+ * the resource share of P1: X1_1
+ * the resource share of P2: X1_2
+ * the capacity of VM1: X1
+ *
+ * Equation 1 was solved in the physical machine layer.
+ * Equation 2 is solved in the virtual machine layer (here).
+ * X1 must be passed to the virtual machine laye as a constraint value.
+ *
+ **/
+
+ /* iterate for all hosts including virtual machines */
+ xbt_lib_cursor_t cursor;
+ char *key;
+ void **ind_host;
+ xbt_lib_foreach(host_lib, cursor, key, ind_host) {
+ workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
+ cpu_Cas01_t cpu_cas01 = ind_host[SURF_CPU_LEVEL];
+
+ if (!ws_clm03)
+ continue;
+ /* skip if it is not a virtual machine */
+ if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
+ continue;
+ xbt_assert(cpu_cas01, "cpu-less workstation");
+
+ /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
+ workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
+
+ double solved_value = get_solved_value(ws_vm2013->cpu_action);
+ XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value,
+ ws_clm03->generic_resource.name, ws_vm2013->sub_ws->generic_resource.name);
+
+ // TODO: check lmm_update_constraint_bound() works fine instead of the below manual substitution.
+ // cpu_cas01->constraint->bound = solved_value;
+ surf_model_t cpu_model = cpu_cas01->generic_resource.model;
+ xbt_assert(cpu_model == surf_cpu_model_vm);
+ lmm_system_t vcpu_system = cpu_model->model_private->maxmin_system;
+ lmm_update_constraint_bound(vcpu_system, cpu_cas01->constraint, virt_overhead * solved_value);
+ }
+
+
+ /* 2. Calculate resource share at the virtual machine layer. */
+ double ret = ws_share_resources(workstation_model, now);
+
+
+ /* FIXME: 3. do we have to re-initialize our cpu_action object? */
+#if 0
+ /* iterate for all hosts including virtual machines */
+ xbt_lib_foreach(host_lib, cursor, key, ind_host) {
+ workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
+
+ /* skip if it is not a virtual machine */
+ if (!ws_clm03)
+ continue;
+ if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
+ continue;
+
+ /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
+ {
+#if 0
+ workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
+ XBT_INFO("cost %f remains %f start %f finish %f", ws_vm2013->cpu_action->cost,
+ ws_vm2013->cpu_action->remains,
+ ws_vm2013->cpu_action->start,
+ ws_vm2013->cpu_action->finish
+ );
+#endif
+#if 0
+ void *ind_sub_host = xbt_lib_get_elm_or_null(host_lib, ws_vm2013->sub_ws->generic_resource.name);
+ surf_cpu_model_pm->action_unref(ws_vm2013->cpu_action);
+ /* FIXME: this means busy loop? */
+ // ws_vm2013->cpu_action = surf_cpu_model_pm->extension.cpu.execute(ind_sub_host, GUESTOS_NOISE);
+ ws_vm2013->cpu_action = surf_cpu_model_pm->extension.cpu.execute(ind_sub_host, 0);
+#endif
+
+ }
+ }
+#endif
+
+
+ return ret;