-/* Copyright (c) 2013-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2013-2019. 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 "src/include/surf/surf.hpp"
#include "src/simix/ActorImpl.hpp"
-#include "src/simix/smx_host_private.h"
+#include "src/simix/smx_host_private.hpp"
+#include "src/kernel/activity/ExecImpl.hpp"
+#include "xbt/asserts.h" // xbt_log_no_loc
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_vm, surf, "Logging specific to the SURF VM module");
void surf_vm_model_init_HL13()
{
- if (surf_cpu_model_vm) {
+ if (surf_cpu_model_vm != nullptr)
surf_vm_model = new simgrid::vm::VMModel();
- all_existing_models->push_back(surf_vm_model);
- }
}
namespace simgrid {
namespace vm {
-
/*************
* Callbacks *
*************/
-
-simgrid::xbt::signal<void(simgrid::vm::VirtualMachineImpl*)> onVmCreation;
-simgrid::xbt::signal<void(simgrid::vm::VirtualMachineImpl*)> onVmDestruction;
-simgrid::xbt::signal<void(simgrid::vm::VirtualMachineImpl*)> onVmStateChange;
-
+simgrid::xbt::signal<void(VirtualMachineImpl*)> VirtualMachineImpl::on_creation;
+simgrid::xbt::signal<void(VirtualMachineImpl*)> VirtualMachineImpl::on_destruction;
+simgrid::xbt::signal<void(VirtualMachineImpl*)> VirtualMachineImpl::on_state_change;
/*********
* Model *
*********/
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 host_state_change(s4u::Host& host)
+{
+ if (not host.is_on()) { // just turned off.
+ std::vector<s4u::VirtualMachine*> trash;
+ /* Find all VMs living on that host */
+ for (s4u::VirtualMachine* const& vm : VirtualMachineImpl::allVms_)
+ if (vm->get_pm() == &host)
+ trash.push_back(vm);
+ for (s4u::VirtualMachine* vm : trash)
+ vm->shutdown();
+ }
+}
+
+static s4u::VirtualMachine* get_vm_from_task(kernel::activity::ActivityImplPtr task)
+{
+ kernel::activity::ExecImpl* exec = dynamic_cast<kernel::activity::ExecImpl*>(task.get());
+ return exec != nullptr ? dynamic_cast<s4u::VirtualMachine*>(exec->host_) : nullptr;
+}
+
+static void add_active_task(kernel::activity::ActivityImplPtr task)
+{
+ s4u::VirtualMachine* vm = get_vm_from_task(task);
+ if (vm != nullptr) {
+ VirtualMachineImpl *vm_impl = vm->get_impl();
+ vm_impl->active_tasks_ = vm_impl->active_tasks_ + 1;
+ vm_impl->update_action_weight();
+ }
+}
+
+static void remove_active_task(kernel::activity::ActivityImplPtr task)
+{
+ s4u::VirtualMachine* vm = get_vm_from_task(task);
+ if (vm != nullptr) {
+ VirtualMachineImpl *vm_impl = vm->get_impl();
+ vm_impl->active_tasks_ = vm_impl->active_tasks_ - 1;
+ vm_impl->update_action_weight();
+ }
+}
+
+VMModel::VMModel()
+{
+ all_existing_models.push_back(this);
+ s4u::Host::on_state_change.connect(host_state_change);
+ kernel::activity::ExecImpl::on_creation.connect(add_active_task);
+ kernel::activity::ExecImpl::on_completion.connect(remove_active_task);
+ kernel::activity::ActivityImpl::on_resumed.connect(add_active_task);
+ kernel::activity::ActivityImpl::on_suspended.connect(remove_active_task);
+}
-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 (s4u::VirtualMachine* ws_vm : VirtualMachineImpl::allVms_) {
+ for (s4u::VirtualMachine* const& ws_vm : VirtualMachineImpl::allVms_) {
surf::Cpu* cpu = ws_vm->pimpl_cpu;
- xbt_assert(cpu, "cpu-less host");
- double solved_value = ws_vm->pimpl_vm_->action_->getVariable()->value;
- XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value, ws_vm->cname(), ws_vm->pimpl_vm_->getPm()->cname());
+ double solved_value =
+ ws_vm->get_impl()->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->get_pm()->get_cname());
- // TODO: check lmm_update_constraint_bound() works fine instead of the below manual substitution.
- // cpu_cas01->constraint->bound = solved_value;
- xbt_assert(cpu->model() == surf_cpu_model_vm);
- lmm_system_t vcpu_system = cpu->model()->getMaxminSystem();
- lmm_update_constraint_bound(vcpu_system, cpu->constraint(), virt_overhead * solved_value);
+ 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();
-
- /* 3. Ready. Get the next occuring event */
- return surf_cpu_model_vm->nextOccuringEvent(now);
+ /* 2. Ready. Get the next occurring event */
+ return surf_cpu_model_vm->next_occuring_event(now);
}
/************
* Resource *
************/
-VirtualMachineImpl::VirtualMachineImpl(simgrid::s4u::VirtualMachine* piface, simgrid::s4u::Host* host_PM)
- : HostImpl(piface), hostPM_(host_PM)
+VirtualMachineImpl::VirtualMachineImpl(simgrid::s4u::VirtualMachine* piface, simgrid::s4u::Host* host_PM,
+ int core_amount, size_t ramsize)
+ : HostImpl(piface), physical_host_(host_PM), core_amount_(core_amount), user_bound_(std::numeric_limits<double>::max()), ramsize_(ramsize)
{
/* Register this VM to the list of all VMs */
allVms_.push_back(piface);
/* We create cpu_action corresponding to a VM process on the host operating system. */
/* TODO: we have to periodically input GUESTOS_NOISE to the system? how ? */
- action_ = host_PM->pimpl_cpu->execution_start(0);
+ action_ = host_PM->pimpl_cpu->execution_start(0, core_amount);
- /* Initialize the VM parameters */
- params_.ramsize = 0;
+ // It's empty for now, so it should not request resources in the PM
+ update_action_weight();
- XBT_VERB("Create VM(%s)@PM(%s)", piface->cname(), hostPM_->cname());
+ XBT_VERB("Create VM(%s)@PM(%s)", piface->get_cname(), physical_host_->get_cname());
+ on_creation(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);
+ on_destruction(this);
/* 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);
- /* dirty page tracking */
- unsigned int size = xbt_dict_size(dp_objs);
- static bool already_warned = false;
- if (size > 0 && not 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);
-
/* Free the cpu_action of the VM. */
- XBT_ATTRIB_UNUSED int ret = action_->unref();
- xbt_assert(ret == 1, "Bug: some resource still remains");
+ XBT_ATTRIB_UNUSED bool ret = action_->unref();
+ xbt_assert(ret, "Bug: some resource still remains");
}
-e_surf_vm_state_t VirtualMachineImpl::getState()
-{
- return vmState_;
-}
-
-void VirtualMachineImpl::setState(e_surf_vm_state_t state)
-{
- vmState_ = state;
-}
void VirtualMachineImpl::suspend(smx_actor_t issuer)
{
- if (isMigrating)
- THROWF(vm_error, 0, "Cannot suspend VM '%s': it is migrating", piface_->cname());
- if (getState() != SURF_VM_STATE_RUNNING)
- THROWF(vm_error, 0, "Cannot suspend VM %s: it is not running.", piface_->cname());
- if (issuer->host == piface_)
- THROWF(vm_error, 0, "Actor %s cannot suspend the VM %s in which it runs", issuer->cname(), piface_->cname());
+ if (get_state() != s4u::VirtualMachine::state::RUNNING)
+ THROWF(vm_error, 0, "Cannot suspend VM %s: it is not running.", piface_->get_cname());
+ if (issuer->get_host() == piface_)
+ THROWF(vm_error, 0, "Actor %s cannot suspend the VM %s in which it runs", issuer->get_cname(),
+ piface_->get_cname());
- xbt_swag_t process_list = piface_->extension<simgrid::simix::Host>()->process_list;
- XBT_DEBUG("suspend VM(%s), where %d processes exist", piface_->cname(), xbt_swag_size(process_list));
+ XBT_DEBUG("suspend VM(%s), where %zu processes exist", piface_->get_cname(), process_list_.size());
action_->suspend();
- smx_actor_t smx_process;
- smx_actor_t smx_process_safe;
- xbt_swag_foreach_safe(smx_process, smx_process_safe, process_list) {
- XBT_DEBUG("suspend %s", smx_process->name.c_str());
- SIMIX_process_suspend(smx_process, issuer);
+ for (auto& smx_process : process_list_) {
+ XBT_DEBUG("suspend %s", smx_process.get_cname());
+ smx_process.suspend(issuer);
}
XBT_DEBUG("suspend all processes on the VM done done");
- vmState_ = SURF_VM_STATE_SUSPENDED;
+ vm_state_ = s4u::VirtualMachine::state::SUSPENDED;
}
void VirtualMachineImpl::resume()
{
- if (getState() != SURF_VM_STATE_SUSPENDED)
- THROWF(vm_error, 0, "Cannot resume VM %s: it was not suspended", piface_->cname());
+ if (get_state() != s4u::VirtualMachine::state::SUSPENDED)
+ THROWF(vm_error, 0, "Cannot resume VM %s: it was not suspended", piface_->get_cname());
- xbt_swag_t process_list = piface_->extension<simgrid::simix::Host>()->process_list;
- XBT_DEBUG("Resume VM %s, containing %d processes.", piface_->cname(), xbt_swag_size(process_list));
+ XBT_DEBUG("Resume VM %s, containing %zu processes.", piface_->get_cname(), process_list_.size());
action_->resume();
- smx_actor_t smx_process;
- smx_actor_t smx_process_safe;
- xbt_swag_foreach_safe(smx_process, smx_process_safe, process_list) {
- XBT_DEBUG("resume %s", smx_process->cname());
- SIMIX_process_resume(smx_process);
+ for (auto& smx_process : process_list_) {
+ XBT_DEBUG("resume %s", smx_process.get_cname());
+ smx_process.resume();
}
- vmState_ = SURF_VM_STATE_RUNNING;
+ vm_state_ = s4u::VirtualMachine::state::RUNNING;
}
/** @brief Power off a VM.
*/
void VirtualMachineImpl::shutdown(smx_actor_t issuer)
{
- if (getState() != SURF_VM_STATE_RUNNING)
- THROWF(vm_error, 0, "Cannot shutdown VM %s: it is not running", piface_->cname());
+ if (get_state() != s4u::VirtualMachine::state::RUNNING) {
+ const char* stateName = "(unknown state)";
+ switch (get_state()) {
+ case s4u::VirtualMachine::state::CREATED:
+ stateName = "created, but not yet started";
+ break;
+ case s4u::VirtualMachine::state::SUSPENDED:
+ stateName = "suspended";
+ break;
+ case s4u::VirtualMachine::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);
+ }
- xbt_swag_t process_list = piface_->extension<simgrid::simix::Host>()->process_list;
- XBT_DEBUG("shutdown VM %s, that contains %d processes", piface_->cname(), xbt_swag_size(process_list));
+ XBT_DEBUG("shutdown VM %s, that contains %zu processes", piface_->get_cname(), process_list_.size());
- smx_actor_t smx_process;
- smx_actor_t smx_process_safe;
- xbt_swag_foreach_safe(smx_process, smx_process_safe, process_list) {
- XBT_DEBUG("kill %s", smx_process->cname());
- SIMIX_process_kill(smx_process, issuer);
+ 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.get_host()->get_cname(), issuer->get_cname());
+ issuer->kill(&smx_process);
}
- setState(SURF_VM_STATE_DESTROYED);
+ set_state(s4u::VirtualMachine::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 **/
-s4u::Host* VirtualMachineImpl::getPm()
-{
- return hostPM_;
-}
-
/** @brief Change the physical host on which the given VM is running
*
* This is an instantaneous migration.
*/
-void VirtualMachineImpl::setPm(s4u::Host* destination)
+void VirtualMachineImpl::set_physical_host(s4u::Host* destination)
{
- const char* vm_name = piface_->cname();
- const char* pm_name_src = hostPM_->cname();
- const char* pm_name_dst = destination->cname();
+ std::string vm_name = piface_->get_name();
+ std::string pm_name_src = physical_host_->get_name();
+ std::string pm_name_dst = destination->get_name();
/* update net_elm with that of the destination physical host */
piface_->pimpl_netpoint = destination->pimpl_netpoint;
- hostPM_ = destination;
+ physical_host_ = destination;
/* Update vcpu's action for the new pm */
/* create a cpu action bound to the pm model at the destination. */
- surf::CpuAction* new_cpu_action = static_cast<surf::CpuAction*>(destination->pimpl_cpu->execution_start(0));
+ surf::CpuAction* new_cpu_action =
+ static_cast<surf::CpuAction*>(destination->pimpl_cpu->execution_start(0, this->core_amount_));
- 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();
+ 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);
+ XBT_DEBUG("migrate VM(%s): set bound (%f) at %s", vm_name.c_str(), old_bound, pm_name_dst.c_str());
+ new_cpu_action->set_bound(old_bound);
}
- XBT_ATTRIB_UNUSED int ret = action_->unref();
- xbt_assert(ret == 1, "Bug: some resource still remains");
+ XBT_ATTRIB_UNUSED bool ret = action_->unref();
+ xbt_assert(ret, "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);
+ XBT_DEBUG("migrate VM(%s): change PM (%s to %s)", vm_name.c_str(), pm_name_src.c_str(), pm_name_dst.c_str());
}
-sg_size_t VirtualMachineImpl::getRamsize()
+void VirtualMachineImpl::set_bound(double bound)
{
- return params_.ramsize;
+ user_bound_ = bound;
+ update_action_weight();
}
-void VirtualMachineImpl::setBound(double bound)
-{
- action_->setBound(bound);
-}
+void VirtualMachineImpl::update_action_weight(){
+ /* The impact of the VM over its PM is the min between its vCPU amount and the amount of tasks it contains */
+ int impact = std::min(active_tasks_, get_core_amount());
-void VirtualMachineImpl::getParams(vm_params_t params)
-{
- *params = params_;
-}
+ XBT_DEBUG("set the weight of the dummy CPU action of VM%p on PM to %d (#tasks: %d)", this, impact, active_tasks_);
-void VirtualMachineImpl::setParams(vm_params_t params)
-{
- /* may check something here. */
- params_ = *params;
+ if (impact > 0)
+ action_->set_priority(1. / impact);
+ else
+ action_->set_priority(0.);
+
+ action_->set_bound(std::min(impact * physical_host_->get_speed(), user_bound_));
}
+
}
}
