+/* Each VM has a dummy CPU action on the PM layer. This CPU action works as the
+ * constraint (capacity) of the VM in the PM layer. If the VM does not have any
+ * active task, the dummy CPU action must be deactivated, so that the VM does
+ * not get any CPU share in the PM layer. */
+void WorkstationModel::adjustWeightOfDummyCpuActions()
+{
+ /* 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) {
+ WorkstationCLM03Ptr ws_clm03 = dynamic_cast<WorkstationCLM03Ptr>(
+ static_cast<ResourcePtr>(ind_host[SURF_WKS_LEVEL]));
+ CpuCas01LmmPtr cpu_cas01 = dynamic_cast<CpuCas01LmmPtr>(
+ static_cast<ResourcePtr>(ind_host[SURF_CPU_LEVEL]));
+
+ if (!ws_clm03)
+ continue;
+ /* skip if it is not a virtual machine */
+ if (ws_clm03->p_model != static_cast<ModelPtr>(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 */
+ WorkstationVM2013Ptr ws_vm2013 = dynamic_cast<WorkstationVM2013Ptr>(ws_clm03);
+
+ int is_active = lmm_constraint_used(cpu_cas01->p_model->p_maxminSystem, cpu_cas01->p_constraint);
+ // int is_active_old = constraint_is_active(cpu_cas01);
+
+ // {
+ // xbt_assert(is_active == is_active_old, "%d %d", is_active, is_active_old);
+ // }
+
+ if (is_active) {
+ /* some tasks exist on this VM */
+ XBT_DEBUG("set the weight of the dummy CPU action on PM to 1");
+
+ /* FIXME: we shoud use lmm_update_variable_weight() ? */
+ /* FIXME: If we assgign 1.05 and 0.05, the system makes apparently wrong values. */
+ surf_action_set_priority(ws_vm2013->p_action, 1);
+
+ } else {
+ /* no task exits on this VM */
+ XBT_DEBUG("set the weight of the dummy CPU action on PM to 0");
+
+ surf_action_set_priority(ws_vm2013->p_action, 0);
+ }
+ }
+}
+