-/* 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 "src/simix/ActorImpl.hpp"
-#include "src/simix/smx_host_private.h"
+#include "src/simix/smx_host_private.hpp"
+
+#include <xbt/asserts.h> // xbt_log_no_loc
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_vm, surf, "Logging specific to the SURF VM module");
}
}
-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(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<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
-double VMModel::nextOccuringEvent(double now)
+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::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->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());
- // 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();
+ 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::VirtualMachine* piface, simgrid::s4u::Host* host_PM)
- : HostImpl(piface), 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(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);
-
- /* Initialize the VM parameters */
- params_.ramsize = 0;
+ action_ = host_PM->pimpl_cpu->execution_start(0, coreAmount);
- XBT_VERB("Create VM(%s)@PM(%s)", piface->cname(), hostPM_->cname());
+ 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()
{
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 && !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");
{
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());
+ 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->cname(), piface_->cname());
+ 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));
+ 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();
- 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.name.c_str());
+ smx_process.suspend(issuer);
}
XBT_DEBUG("suspend all processes on the VM done done");
void VirtualMachineImpl::resume()
{
if (getState() != SURF_VM_STATE_SUSPENDED)
- THROWF(vm_error, 0, "Cannot resume VM %s: it was not suspended", piface_->cname());
+ 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));
+ 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();
- 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;
*/
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 (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);
+ }
- 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));
+ 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());
- 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.host->get_cname(), issuer->get_cname());
+ SIMIX_process_kill(&smx_process, issuer);
}
setState(SURF_VM_STATE_DESTROYED);
*/
void VirtualMachineImpl::setPm(s4u::Host* destination)
{
- const char* vm_name = piface_->cname();
- const char* pm_name_src = hostPM_->cname();
- const char* pm_name_dst = destination->cname();
+ 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_netpoint = destination->pimpl_netpoint;
/* 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->coreAmount_));
- 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);
+ 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);
-}
-
-void VirtualMachineImpl::getParams(vm_params_t params)
-{
- *params = params_;
+ action_->set_bound(bound);
}
-void VirtualMachineImpl::setParams(vm_params_t params)
-{
- /* may check something here. */
- params_ = *params;
-}
}
}
