simgrid::surf::VMModel *surf_vm_model = nullptr;
+void surf_vm_model_init_HL13(){
+ if (surf_cpu_model_vm) {
+ surf_vm_model = new simgrid::surf::VMModel();
+ all_existing_models->push_back(surf_vm_model);
+ }
+}
+
namespace simgrid {
namespace surf {
+
/*************
* Callbacks *
*************/
std::deque<VirtualMachine*> VirtualMachine::allVms_;
+s4u::Host *VMModel::createVM(const char *name, sg_host_t host_PM)
+{
+ VirtualMachine* vm = new VirtualMachine(this, name, host_PM);
+ onVmCreation(vm);
+ return vm->piface_;
+}
+
+/* In the real world, processes on the guest operating system will be somewhat degraded due to virtualization overhead.
+ * The total CPU share these processes get is smaller than that of the VM process gets on a host operating system. */
+// const double virt_overhead = 0.95;
+const double virt_overhead = 1;
+
+double VMModel::nextOccuringEvent(double now)
+{
+ /* TODO: update action's cost with the total cost of processes on the VM. */
+
+ /* 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 virtual machines */
+ for (VirtualMachine *ws_vm : VirtualMachine::allVms_) {
+ Cpu* cpu = ws_vm->piface_->pimpl_cpu;
+ xbt_assert(cpu, "cpu-less host");
+
+ double solved_value = ws_vm->action_->getVariable()->value;
+ XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value, ws_vm->getName(), ws_vm->getPm()->name().c_str());
+
+ // TODO: check lmm_update_constraint_bound() works fine instead of the below manual substitution.
+ // cpu_cas01->constraint->bound = solved_value;
+ xbt_assert(cpu->getModel() == surf_cpu_model_vm);
+ lmm_system_t vcpu_system = cpu->getModel()->getMaxminSystem();
+ lmm_update_constraint_bound(vcpu_system, cpu->getConstraint(), virt_overhead * solved_value);
+ }
+
+ /* 2. Calculate resource share at the virtual machine layer. */
+ adjustWeightOfDummyCpuActions();
+
+ /* 3. Ready. Get the next occuring event */
+ return surf_cpu_model_vm->nextOccuringEvent(now);
+}
+
+
/************
* Resource *
************/
-VirtualMachine::VirtualMachine(HostModel *model, const char *name, simgrid::s4u::Host *hostPM)
-: HostImpl(model, name, nullptr, nullptr, nullptr)
-, hostPM_(hostPM)
+VirtualMachine::VirtualMachine(HostModel* model, const char* name, simgrid::s4u::Host* host_PM)
+ : HostImpl(model, name, nullptr /*constraint*/, nullptr /*storage*/), hostPM_(host_PM)
{
+ /* Register this VM to the list of all VMs */
allVms_.push_back(this);
- piface = simgrid::s4u::Host::by_name_or_create(name);
- piface->extension_set<simgrid::surf::HostImpl>(this);
+
+ piface_ = new simgrid::s4u::Host(name);
+ piface_->pimpl_ = this;
+
+ /* Currently, a VM uses the network resource of its physical host. In
+ * host_lib, this network resource object is referred from two different keys.
+ * When deregistering the reference that points the network resource object
+ * from the VM name, we have to make sure that the system does not call the
+ * free callback for the network resource object. The network resource object
+ * is still used by the physical machine. */
+ piface_->pimpl_netcard = host_PM->pimpl_netcard;
+
+ // //// CPU RELATED STUFF ////
+ // Roughly, create a vcpu resource by using the values of the sub_cpu one.
+ CpuCas01 *sub_cpu = dynamic_cast<CpuCas01*>(host_PM->pimpl_cpu);
+
+ piface_->pimpl_cpu = surf_cpu_model_vm->createCpu(piface_, sub_cpu->getSpeedPeakList(), 1 /*cores*/);
+ if (sub_cpu->getPState() != 0)
+ piface_->pimpl_cpu->setPState(sub_cpu->getPState());
+
+ /* We create cpu_action corresponding to a VM process on the host operating system. */
+ /* FIXME: TODO: we have to periodically input GUESTOS_NOISE to the system? how ? */
+ action_ = sub_cpu->execution_start(0);
+
+ XBT_VERB("Create VM(%s)@PM(%s) with %ld mounted disks", name, hostPM_->name().c_str(), xbt_dynar_length(storage_));
}
/*
}
e_surf_vm_state_t VirtualMachine::getState() {
- return p_vm_state;
+ return vmState_;
}
-void VirtualMachine::setState(e_surf_vm_state_t state) {
- p_vm_state = state;
+void VirtualMachine::setState(e_surf_vm_state_t state)
+{
+ vmState_ = state;
}
-void VirtualMachine::turnOn() {
- if (isOff()) {
- Resource::turnOn();
- onVmStateChange(this);
- }
+void VirtualMachine::suspend()
+{
+ action_->suspend();
+ vmState_ = SURF_VM_STATE_SUSPENDED;
}
-void VirtualMachine::turnOff() {
- if (isOn()) {
- Resource::turnOff();
- onVmStateChange(this);
- }
+
+void VirtualMachine::resume()
+{
+ action_->resume();
+ vmState_ = SURF_VM_STATE_RUNNING;
+}
+
+void VirtualMachine::save()
+{
+ vmState_ = SURF_VM_STATE_SAVING;
+ action_->suspend();
+ vmState_ = SURF_VM_STATE_SAVED;
+}
+
+void VirtualMachine::restore()
+{
+ vmState_ = SURF_VM_STATE_RESTORING;
+ action_->resume();
+ vmState_ = SURF_VM_STATE_RUNNING;
}
/** @brief returns the physical machine on which the VM is running **/
return hostPM_;
}
+/* Update the physical host of the given VM */
+void VirtualMachine::migrate(sg_host_t host_dest)
+{
+ HostImpl* surfHost_dst = host_dest->pimpl_;
+ const char* vm_name = getName();
+ const char* pm_name_src = hostPM_->name().c_str();
+ const char* pm_name_dst = surfHost_dst->getName();
+
+ /* update net_elm with that of the destination physical host */
+ sg_host_by_name(vm_name)->pimpl_netcard = sg_host_by_name(pm_name_dst)->pimpl_netcard;
+
+ hostPM_ = host_dest;
+
+ /* Update vcpu's action for the new pm */
+ /* create a cpu action bound to the pm model at the destination. */
+ CpuAction* new_cpu_action = static_cast<CpuAction*>(host_dest->pimpl_cpu->execution_start(0));
+
+ Action::State state = action_->getState();
+ if (state != Action::State::done)
+ XBT_CRITICAL("FIXME: may need a proper handling, %d", static_cast<int>(state));
+ if (action_->getRemainsNoUpdate() > 0)
+ XBT_CRITICAL("FIXME: need copy the state(?), %f", action_->getRemainsNoUpdate());
+
+ /* keep the bound value of the cpu action of the VM. */
+ double old_bound = action_->getBound();
+ if (old_bound != 0) {
+ XBT_DEBUG("migrate VM(%s): set bound (%f) at %s", vm_name, old_bound, pm_name_dst);
+ new_cpu_action->setBound(old_bound);
+ }
+
+ XBT_ATTRIB_UNUSED int ret = action_->unref();
+ xbt_assert(ret == 1, "Bug: some resource still remains");
+
+ action_ = new_cpu_action;
+
+ XBT_DEBUG("migrate VM(%s): change PM (%s to %s)", vm_name, pm_name_src, pm_name_dst);
+}
+
+void VirtualMachine::setBound(double bound){
+ action_->setBound(bound);
+}
+
+
}
}
