-/* Copyright (c) 2013-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2013-2018. 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. */
#include "src/plugins/vm/VirtualMachineImpl.hpp"
-#include "simgrid/s4u/VirtualMachine.hpp"
+#include "src/simix/ActorImpl.hpp"
+#include "src/simix/smx_host_private.hpp"
-#include <xbt/signal.hpp>
-
-#include "src/surf/cpu_cas01.hpp"
+#include <xbt/asserts.h> // xbt_log_no_loc
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_vm, surf, "Logging specific to the SURF VM module");
-simgrid::surf::VMModel* surf_vm_model = nullptr;
+simgrid::vm::VMModel* surf_vm_model = nullptr;
void surf_vm_model_init_HL13()
{
if (surf_cpu_model_vm) {
- surf_vm_model = new simgrid::surf::VMModel();
+ surf_vm_model = new simgrid::vm::VMModel();
all_existing_models->push_back(surf_vm_model);
}
}
-namespace simgrid {
-namespace surf {
/*************
* Callbacks *
*************/
-simgrid::xbt::signal<void(simgrid::surf::VirtualMachineImpl*)> onVmCreation;
-simgrid::xbt::signal<void(simgrid::surf::VirtualMachineImpl*)> onVmDestruction;
-simgrid::xbt::signal<void(simgrid::surf::VirtualMachineImpl*)> onVmStateChange;
+simgrid::xbt::signal<void(simgrid::vm::VirtualMachineImpl*)> simgrid::vm::VirtualMachineImpl::onVmCreation;
+simgrid::xbt::signal<void(simgrid::vm::VirtualMachineImpl*)> simgrid::vm::VirtualMachineImpl::onVmDestruction;
+simgrid::xbt::signal<void(simgrid::vm::VirtualMachineImpl*)> simgrid::vm::VirtualMachineImpl::onVmStateChange;
+namespace simgrid {
+namespace vm {
/*********
* Model *
*********/
-std::deque<VirtualMachineImpl*> VirtualMachineImpl::allVms_;
+std::deque<s4u::VirtualMachine*> VirtualMachineImpl::allVms_;
/* 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;
+ * The total CPU share these processes get is smaller than that of the VM process gets on a host operating system.
+ * FIXME: add a configuration flag for this
+ */
+const double virt_overhead = 1; // 0.95
+
+static void hostStateChange(s4u::Host& host)
+{
+ if (host.isOff()) { // just turned off.
+ std::vector<s4u::VirtualMachine*> trash;
+ /* Find all VMs living on that host */
+ for (s4u::VirtualMachine* const& vm : VirtualMachineImpl::allVms_)
+ if (vm->getPm() == &host)
+ trash.push_back(vm);
+ for (s4u::VirtualMachine* vm : trash)
+ vm->shutdown();
+ }
+}
+VMModel::VMModel()
+{
+ s4u::Host::on_state_change.connect(hostStateChange);
+}
-double VMModel::nextOccuringEvent(double now)
+double VMModel::next_occuring_event(double now)
{
/* TODO: update action's cost with the total cost of processes on the VM. */
*
* 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.
+ * X1 must be passed to the virtual machine layer as a constraint value.
**/
/* iterate for all virtual machines */
- for (VirtualMachineImpl* ws_vm : VirtualMachineImpl::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->piface_->name().c_str(),
- 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);
+ for (s4u::VirtualMachine* const& ws_vm : VirtualMachineImpl::allVms_) {
+ surf::Cpu* cpu = ws_vm->pimpl_cpu;
+
+ double solved_value =
+ ws_vm->getImpl()->action_->get_variable()->get_value(); // this is X1 in comment above, what
+ // this VM got in the sharing on the PM
+ XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value, ws_vm->get_cname(), ws_vm->getPm()->get_cname());
+
+ xbt_assert(cpu->get_model() == surf_cpu_model_vm);
+ kernel::lmm::System* vcpu_system = cpu->get_model()->get_maxmin_system();
+ vcpu_system->update_constraint_bound(cpu->get_constraint(), virt_overhead * solved_value);
}
/* 2. Calculate resource share at the virtual machine layer. */
- adjustWeightOfDummyCpuActions();
+ ignore_empty_vm_in_pm_LMM();
- /* 3. Ready. Get the next occuring event */
- return surf_cpu_model_vm->nextOccuringEvent(now);
+ /* 3. Ready. Get the next occurring event */
+ return surf_cpu_model_vm->next_occuring_event(now);
}
/************
* Resource *
************/
-VirtualMachineImpl::VirtualMachineImpl(simgrid::s4u::Host* piface, simgrid::s4u::Host* host_PM)
- : HostImpl(piface, nullptr /*storage*/), hostPM_(host_PM)
+VirtualMachineImpl::VirtualMachineImpl(simgrid::s4u::VirtualMachine* piface, simgrid::s4u::Host* host_PM,
+ int coreAmount, size_t ramsize)
+ : HostImpl(piface), hostPM_(host_PM), coreAmount_(coreAmount), ramsize_(ramsize)
{
/* Register this VM to the list of all VMs */
- allVms_.push_back(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());
+ allVms_.push_back(piface);
/* 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);
-
- /* Initialize the VM parameters */
- params_.ramsize = 0;
+ /* TODO: we have to periodically input GUESTOS_NOISE to the system? how ? */
+ action_ = host_PM->pimpl_cpu->execution_start(0, coreAmount);
- XBT_VERB("Create VM(%s)@PM(%s) with %ld mounted disks", piface->name().c_str(), hostPM_->name().c_str(),
- xbt_dynar_length(storage_));
+ XBT_VERB("Create VM(%s)@PM(%s)", piface->get_cname(), hostPM_->get_cname());
+ onVmCreation(this);
}
-extern "C" int
- xbt_log_no_loc; /* ugly pimpl to ensure that the debug info in the known issue below don't break the test */
/** @brief A physical host does not disappear in the current SimGrid code, but a VM may disappear during a simulation */
VirtualMachineImpl::~VirtualMachineImpl()
{
onVmDestruction(this);
- allVms_.erase(find(allVms_.begin(), allVms_.end(), this));
-
- /* dirty page tracking */
- unsigned int size = xbt_dict_size(dp_objs);
- static bool already_warned = false;
- if (size > 0 && !already_warned) {
- xbt_dict_cursor_t cursor = nullptr;
- xbt_dict_cursor_first(dp_objs, &cursor);
- XBT_WARN("Dirty page tracking: %u pending task(s) on a destroyed VM (first one is %s).\n"
- "If you don't understand why your task was not properly removed, please report that bug.\n"
- "This is a known bug if you turned the host off during the VM execution.\n"
- "Please remind us of that problem at some point: our code base is not ready to fix this harmless issue in "
- "2016, sorry.",
- size, (xbt_log_no_loc ? "(name hidden)" : xbt_dict_cursor_get_key(cursor)));
- xbt_dict_cursor_free(&cursor);
- already_warned = true;
- }
- xbt_dict_free(&dp_objs);
+ /* I was already removed from the allVms set if the VM was destroyed cleanly */
+ auto iter = find(allVms_.begin(), allVms_.end(), piface_);
+ if (iter != allVms_.end())
+ allVms_.erase(iter);
/* Free the cpu_action of the VM. */
XBT_ATTRIB_UNUSED int ret = action_->unref();
xbt_assert(ret == 1, "Bug: some resource still remains");
-
- delete piface_->pimpl_cpu;
}
e_surf_vm_state_t VirtualMachineImpl::getState()
{
vmState_ = state;
}
-void VirtualMachineImpl::suspend()
+
+void VirtualMachineImpl::suspend(smx_actor_t issuer)
{
+ if (getState() != SURF_VM_STATE_RUNNING)
+ THROWF(vm_error, 0, "Cannot suspend VM %s: it is not running.", piface_->get_cname());
+ if (issuer->host == piface_)
+ THROWF(vm_error, 0, "Actor %s cannot suspend the VM %s in which it runs", issuer->get_cname(),
+ piface_->get_cname());
+
+ auto& process_list = piface_->extension<simgrid::simix::Host>()->process_list;
+ XBT_DEBUG("suspend VM(%s), where %zu processes exist", piface_->get_cname(), process_list.size());
+
action_->suspend();
+
+ for (auto& smx_process : process_list) {
+ XBT_DEBUG("suspend %s", smx_process.name.c_str());
+ smx_process.suspend(issuer);
+ }
+
+ XBT_DEBUG("suspend all processes on the VM done done");
+
vmState_ = SURF_VM_STATE_SUSPENDED;
}
void VirtualMachineImpl::resume()
{
+ if (getState() != SURF_VM_STATE_SUSPENDED)
+ THROWF(vm_error, 0, "Cannot resume VM %s: it was not suspended", piface_->get_cname());
+
+ auto& process_list = piface_->extension<simgrid::simix::Host>()->process_list;
+ XBT_DEBUG("Resume VM %s, containing %zu processes.", piface_->get_cname(), process_list.size());
+
action_->resume();
+
+ for (auto& smx_process : process_list) {
+ XBT_DEBUG("resume %s", smx_process.get_cname());
+ smx_process.resume();
+ }
+
vmState_ = SURF_VM_STATE_RUNNING;
}
-void VirtualMachineImpl::save()
+/** @brief Power off a VM.
+ *
+ * All hosted processes will be killed, but the VM state is preserved on memory.
+ * It can later be restarted.
+ *
+ * @param issuer the actor requesting the shutdown
+ */
+void VirtualMachineImpl::shutdown(smx_actor_t issuer)
{
- vmState_ = SURF_VM_STATE_SAVING;
- action_->suspend();
- vmState_ = SURF_VM_STATE_SAVED;
-}
+ if (getState() != SURF_VM_STATE_RUNNING) {
+ const char* stateName = "(unknown state)";
+ switch (getState()) {
+ case SURF_VM_STATE_CREATED:
+ stateName = "created, but not yet started";
+ break;
+ case SURF_VM_STATE_SUSPENDED:
+ stateName = "suspended";
+ break;
+ case SURF_VM_STATE_DESTROYED:
+ stateName = "destroyed";
+ break;
+ default: /* SURF_VM_STATE_RUNNING or unexpected values */
+ THROW_IMPOSSIBLE;
+ break;
+ }
+ XBT_VERB("Shutting down the VM %s even if it's not running but %s", piface_->get_cname(), stateName);
+ }
-void VirtualMachineImpl::restore()
-{
- vmState_ = SURF_VM_STATE_RESTORING;
- action_->resume();
- vmState_ = SURF_VM_STATE_RUNNING;
+ auto& process_list = piface_->extension<simgrid::simix::Host>()->process_list;
+ XBT_DEBUG("shutdown VM %s, that contains %zu processes", piface_->get_cname(), process_list.size());
+
+ for (auto& smx_process : process_list) {
+ XBT_DEBUG("kill %s@%s on behalf of %s which shutdown that VM.", smx_process.get_cname(),
+ smx_process.host->get_cname(), issuer->get_cname());
+ SIMIX_process_kill(&smx_process, issuer);
+ }
+
+ setState(SURF_VM_STATE_DESTROYED);
+
+ /* FIXME: we may have to do something at the surf layer, e.g., vcpu action */
}
/** @brief returns the physical machine on which the VM is running **/
return hostPM_;
}
-/* Update the physical host of the given VM */
-void VirtualMachineImpl::migrate(s4u::Host* host_dest)
+/** @brief Change the physical host on which the given VM is running
+ *
+ * This is an instantaneous migration.
+ */
+void VirtualMachineImpl::setPm(s4u::Host* destination)
{
- const char* vm_name = piface_->name().c_str();
- const char* pm_name_src = hostPM_->name().c_str();
- const char* pm_name_dst = host_dest->name().c_str();
+ const char* vm_name = piface_->get_cname();
+ const char* pm_name_src = hostPM_->get_cname();
+ const char* pm_name_dst = destination->get_cname();
/* update net_elm with that of the destination physical host */
- piface_->pimpl_netcard = host_dest->pimpl_netcard;
+ piface_->pimpl_netpoint = destination->pimpl_netpoint;
- hostPM_ = host_dest;
+ hostPM_ = destination;
/* 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));
+ surf::CpuAction* new_cpu_action =
+ static_cast<surf::CpuAction*>(destination->pimpl_cpu->execution_start(0, this->coreAmount_));
- 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());
+ if (action_->get_remains_no_update() > 0)
+ XBT_CRITICAL("FIXME: need copy the state(?), %f", action_->get_remains_no_update());
/* keep the bound value of the cpu action of the VM. */
- double old_bound = action_->getBound();
- if (old_bound != 0) {
+ double old_bound = action_->get_bound();
+ 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);
+ new_cpu_action->set_bound(old_bound);
}
XBT_ATTRIB_UNUSED int ret = action_->unref();
XBT_DEBUG("migrate VM(%s): change PM (%s to %s)", vm_name, pm_name_src, pm_name_dst);
}
-sg_size_t VirtualMachineImpl::getRamsize()
-{
- return params_.ramsize;
-}
-
void VirtualMachineImpl::setBound(double bound)
{
- action_->setBound(bound);
+ action_->set_bound(bound);
}
-void VirtualMachineImpl::getParams(vm_params_t params)
-{
- *params = params_;
-}
-
-void VirtualMachineImpl::setParams(vm_params_t params)
-{
- /* may check something here. */
- params_ = *params;
-}
}
}
