+++ /dev/null
-/* Copyright (c) 2015-2021. 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 "simgrid/Exception.hpp"
-#include "simgrid/kernel/routing/NetPoint.hpp"
-#include "simgrid/s4u/Actor.hpp"
-#include "simgrid/vm.h"
-#include "src/include/surf/surf.hpp"
-#include "src/plugins/vm/VirtualMachineImpl.hpp"
-#include "src/plugins/vm/VmHostExt.hpp"
-#include "src/surf/cpu_cas01.hpp"
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_vm, s4u, "S4U virtual machines");
-
-namespace simgrid {
-namespace s4u {
-simgrid::xbt::signal<void(VirtualMachine const&)> VirtualMachine::on_start;
-simgrid::xbt::signal<void(VirtualMachine const&)> VirtualMachine::on_started;
-simgrid::xbt::signal<void(VirtualMachine const&)> VirtualMachine::on_shutdown;
-simgrid::xbt::signal<void(VirtualMachine const&)> VirtualMachine::on_suspend;
-simgrid::xbt::signal<void(VirtualMachine const&)> VirtualMachine::on_resume;
-simgrid::xbt::signal<void(VirtualMachine const&)> VirtualMachine::on_migration_start;
-simgrid::xbt::signal<void(VirtualMachine const&)> VirtualMachine::on_migration_end;
-
-VirtualMachine::VirtualMachine(const std::string& name, s4u::Host* physical_host, int core_amount)
- : VirtualMachine(name, physical_host, core_amount, 1024)
-{
-}
-
-VirtualMachine::VirtualMachine(const std::string& name, s4u::Host* physical_host, int core_amount, size_t ramsize)
- : Host(name), pimpl_vm_(new vm::VirtualMachineImpl(this, physical_host, core_amount, ramsize))
-{
- XBT_DEBUG("Create VM %s", get_cname());
-
- /* Currently, a VM uses the network resource of its physical host */
- set_netpoint(physical_host->get_netpoint());
-
- // Create a VCPU for this VM
- std::vector<double> speeds;
- for (int i = 0; i < physical_host->get_pstate_count(); i++)
- speeds.push_back(physical_host->get_pstate_speed(i));
-
- // FIXME[donassolo]: shoud this be done at the Impl class???
- physical_host->get_netpoint()->get_englobing_zone()->get_cpu_vm_model()->create_cpu(this, speeds)->set_core_count(core_amount)->seal();
- if (physical_host->get_pstate() != 0)
- set_pstate(physical_host->get_pstate());
-
- // Real hosts are (only) created through NetZone::create_host(), and this where the on_creation signal is fired.
- // VMs are created directly, thus firing the signal here. The right solution is probably to separate Host and VM.
- simgrid::s4u::Host::on_creation(*this);
-}
-
-VirtualMachine::~VirtualMachine()
-{
- on_destruction(*this);
-
- XBT_DEBUG("destroy %s", get_cname());
-
- /* Don't free these things twice: they are the ones of my physical host */
- set_netpoint(nullptr);
-}
-
-void VirtualMachine::start()
-{
- on_start(*this);
-
- kernel::actor::simcall([this]() {
- vm::VmHostExt::ensureVmExtInstalled();
-
- Host* pm = this->pimpl_vm_->get_physical_host();
- if (pm->extension<vm::VmHostExt>() == nullptr)
- pm->extension_set(new vm::VmHostExt());
-
- long pm_ramsize = pm->extension<vm::VmHostExt>()->ramsize;
- int pm_overcommit = pm->extension<vm::VmHostExt>()->overcommit;
- long vm_ramsize = this->get_ramsize();
-
- if (pm_ramsize && not pm_overcommit) { /* Only verify that we don't overcommit on need */
- /* Retrieve the memory occupied by the VMs on that host. Yep, we have to traverse all VMs of all hosts for that */
- long total_ramsize_of_vms = 0;
- for (VirtualMachine* const& ws_vm : vm::VirtualMachineImpl::allVms_)
- if (pm == ws_vm->get_pm())
- total_ramsize_of_vms += ws_vm->get_ramsize();
-
- if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) {
- XBT_WARN("cannot start %s@%s due to memory shortage: vm_ramsize %ld, free %ld, pm_ramsize %ld (bytes).",
- this->get_cname(), pm->get_cname(), vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
- throw VmFailureException(XBT_THROW_POINT,
- xbt::string_printf("Memory shortage on host '%s', VM '%s' cannot be started",
- pm->get_cname(), this->get_cname()));
- }
- }
-
- this->pimpl_vm_->set_state(VirtualMachine::state::RUNNING);
- });
-
- on_started(*this);
-}
-
-void VirtualMachine::suspend()
-{
- on_suspend(*this);
- kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
- kernel::actor::simcall([this, issuer]() { pimpl_vm_->suspend(issuer); });
-}
-
-void VirtualMachine::resume()
-{
- pimpl_vm_->resume();
- on_resume(*this);
-}
-
-void VirtualMachine::shutdown()
-{
- kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
- kernel::actor::simcall([this, issuer]() { pimpl_vm_->shutdown(issuer); });
- on_shutdown(*this);
-}
-
-void VirtualMachine::destroy()
-{
- /* First, terminate all processes on the VM if necessary */
- shutdown();
-
- /* Then, destroy the VM object */
- Host::destroy();
-}
-
-simgrid::s4u::Host* VirtualMachine::get_pm() const
-{
- return pimpl_vm_->get_physical_host();
-}
-
-VirtualMachine* VirtualMachine::set_pm(simgrid::s4u::Host* pm)
-{
- kernel::actor::simcall([this, pm]() { pimpl_vm_->set_physical_host(pm); });
- return this;
-}
-
-VirtualMachine::state VirtualMachine::get_state() const
-{
- return kernel::actor::simcall([this]() { return pimpl_vm_->get_state(); });
-}
-
-size_t VirtualMachine::get_ramsize() const
-{
- return pimpl_vm_->get_ramsize();
-}
-
-VirtualMachine* VirtualMachine::set_ramsize(size_t ramsize)
-{
- pimpl_vm_->set_ramsize(ramsize);
- return this;
-}
-/** @brief Set a CPU bound for a given VM.
- * @ingroup msg_VMs
- *
- * 1. Note that in some cases MSG_task_set_bound() may not intuitively work for VMs.
- *
- * For example,
- * On PM0, there are Task1 and VM0.
- * On VM0, there is Task2.
- * Now we bound 75% to Task1\@PM0 and bound 25% to Task2\@VM0.
- * Then,
- * Task1\@PM0 gets 50%.
- * Task2\@VM0 gets 25%.
- * This is NOT 75% for Task1\@PM0 and 25% for Task2\@VM0, respectively.
- *
- * This is because a VM has the dummy CPU action in the PM layer. Putting a task on the VM does not affect the bound of
- * the dummy CPU action. The bound of the dummy CPU action is unlimited.
- *
- * There are some solutions for this problem. One option is to update the bound of the dummy CPU action automatically.
- * It should be the sum of all tasks on the VM. But, this solution might be costly, because we have to scan all tasks
- * on the VM in share_resource() or we have to trap both the start and end of task execution.
- *
- * The current solution is to use setBound(), which allows us to directly set the bound of the dummy CPU action.
- *
- * 2. Note that bound == 0 means no bound (i.e., unlimited). But, if a host has multiple CPU cores, the CPU share of a
- * computation task (or a VM) never exceeds the capacity of a CPU core.
- */
-VirtualMachine* VirtualMachine::set_bound(double bound)
-{
- kernel::actor::simcall([this, bound]() { pimpl_vm_->set_bound(bound); });
- return this;
-}
-
-} // namespace simgrid
-} // namespace s4u
-
-/* **************************** Public C interface *************************** */
-
-/** @brief Create a new VM object with the default parameters
- * A VM is treated as a host. The name of the VM must be unique among all hosts.
- */
-sg_vm_t sg_vm_create_core(sg_host_t pm, const char* name)
-{
- return sg_vm_create_multicore(pm, name, 1);
-}
-/** @brief Create a new VM object with the default parameters, but with a specified amount of cores
- * A VM is treated as a host. The name of the VM must be unique among all hosts.
- */
-sg_vm_t sg_vm_create_multicore(sg_host_t pm, const char* name, int coreAmount)
-{
- return new simgrid::s4u::VirtualMachine(name, pm, coreAmount);
-}
-
-const char* sg_vm_get_name(const_sg_vm_t vm)
-{
- return vm->get_cname();
-}
-
-/** @brief Get the physical host of a given VM. */
-sg_host_t sg_vm_get_pm(const_sg_vm_t vm)
-{
- return vm->get_pm();
-}
-
-void sg_vm_set_ramsize(sg_vm_t vm, size_t size)
-{
- vm->set_ramsize(size);
-}
-
-size_t sg_vm_get_ramsize(const_sg_vm_t vm)
-{
- return vm->get_ramsize();
-}
-
-void sg_vm_set_bound(sg_vm_t vm, double bound)
-{
- vm->set_bound(bound);
-}
-
-/** @brief Returns whether the given VM has just created, not running. */
-int sg_vm_is_created(const_sg_vm_t vm)
-{
- return vm->get_state() == simgrid::s4u::VirtualMachine::state::CREATED;
-}
-
-/** @brief Returns whether the given VM is currently running */
-int sg_vm_is_running(const_sg_vm_t vm)
-{
- return vm->get_state() == simgrid::s4u::VirtualMachine::state::RUNNING;
-}
-
-/** @brief Returns whether the given VM is currently suspended, not running. */
-int sg_vm_is_suspended(const_sg_vm_t vm)
-{
- return vm->get_state() == simgrid::s4u::VirtualMachine::state::SUSPENDED;
-}
-
-/** @brief Start a vm (i.e., boot the guest operating system)
- * If the VM cannot be started (because of memory over-provisioning), an exception is generated.
- */
-void sg_vm_start(sg_vm_t vm)
-{
- vm->start();
-}
-
-/** @brief Immediately suspend the execution of all processes within the given VM.
- *
- * This function stops the execution of the VM. All the processes on this VM
- * will pause. The state of the VM is preserved. We can later resume it again.
- *
- * No suspension cost occurs.
- */
-void sg_vm_suspend(sg_vm_t vm)
-{
- vm->suspend();
-}
-
-/** @brief Resume the execution of the VM. All processes on the VM run again.
- * No resume cost occurs.
- */
-void sg_vm_resume(sg_vm_t vm)
-{
- vm->resume();
-}
-
-/** @brief Immediately kills all processes within the given VM.
- *
- @beginrst
-
- The memory allocated by these actors is leaked, unless you used :cpp:func:`simgrid::s4u::Actor::on_exit`.
-
- @endrst
- *
- * No extra delay occurs by default. You may let your actor sleep by a specific amount to simulate any extra delay that you want.
- */
-void sg_vm_shutdown(sg_vm_t vm)
-{
- vm->shutdown();
-}
-
-/** @brief Destroy a VM. Destroy the VM object from the simulation. */
-void sg_vm_destroy(sg_vm_t vm)
-{
- vm->destroy();
-}
