+++ /dev/null
-/* Copyright (c) 2015-2018. 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 "simgrid/s4u/Actor.hpp"
-#include "simgrid/vm.h"
-#include "src/plugins/vm/VirtualMachineImpl.hpp"
-#include "src/plugins/vm/VmHostExt.hpp"
-#include "src/simix/smx_host_private.hpp"
-#include "src/surf/cpu_cas01.hpp"
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_vm, "S4U virtual machines");
-
-
-namespace simgrid {
-namespace s4u {
-simgrid::xbt::signal<void(VirtualMachine&)> VirtualMachine::on_start;
-simgrid::xbt::signal<void(VirtualMachine&)> VirtualMachine::on_started;
-simgrid::xbt::signal<void(VirtualMachine&)> VirtualMachine::on_shutdown;
-simgrid::xbt::signal<void(VirtualMachine&)> VirtualMachine::on_suspend;
-simgrid::xbt::signal<void(VirtualMachine&)> VirtualMachine::on_resume;
-
-VirtualMachine::VirtualMachine(const char* name, s4u::Host* physical_host, int core_amount)
- : VirtualMachine(name, physical_host, core_amount, 1024)
-{
-}
-
-VirtualMachine::VirtualMachine(const char* 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", name);
-
- /* Currently, a VM uses the network resource of its physical host */
- pimpl_netpoint = physical_host->pimpl_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->getPstateSpeed(i));
-
- surf_cpu_model_vm->create_cpu(this, &speeds, physical_host->get_core_count());
- if (physical_host->get_pstate() != 0)
- set_pstate(physical_host->get_pstate());
-
- /* Make a process container */
- extension_set<simgrid::simix::Host>(new simgrid::simix::Host());
-}
-
-VirtualMachine::~VirtualMachine()
-{
- on_destruction(*this);
-
- XBT_DEBUG("destroy %s", get_cname());
-
- /* FIXME: this is really strange that everything fails if the next line is removed.
- * This is as if we shared these data with the PM, which definitely should not be the case...
- *
- * We need to test that suspending a VM does not suspends the processes running on its PM, for example.
- * Or we need to simplify this code enough to make it actually readable (but this sounds harder than testing)
- */
- extension_set<simgrid::simix::Host>(nullptr);
-
- /* Don't free these things twice: they are the ones of my physical host */
- pimpl_netpoint = nullptr;
-}
-
-void VirtualMachine::start()
-{
- on_start(*this);
-
- simgrid::simix::simcall([this]() {
- simgrid::vm::VmHostExt::ensureVmExtInstalled();
-
- simgrid::s4u::Host* pm = this->pimpl_vm_->get_physical_host();
- if (pm->extension<simgrid::vm::VmHostExt>() == nullptr)
- pm->extension_set(new simgrid::vm::VmHostExt());
-
- long pm_ramsize = pm->extension<simgrid::vm::VmHostExt>()->ramsize;
- int pm_overcommit = pm->extension<simgrid::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 (simgrid::s4u::VirtualMachine* const& ws_vm : simgrid::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);
- THROWF(vm_error, 0, "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);
- smx_actor_t issuer = SIMIX_process_self();
- simgrid::simix::simcall([this, issuer]() { pimpl_vm_->suspend(issuer); });
-}
-
-void VirtualMachine::resume()
-{
- pimpl_vm_->resume();
- on_resume(*this);
-}
-
-void VirtualMachine::shutdown()
-{
- smx_actor_t issuer = SIMIX_process_self();
- simgrid::simix::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()
-{
- return pimpl_vm_->get_physical_host();
-}
-
-void VirtualMachine::set_pm(simgrid::s4u::Host* pm)
-{
- simgrid::simix::simcall([this, pm]() { pimpl_vm_->set_physical_host(pm); });
-}
-
-VirtualMachine::state VirtualMachine::getState()
-{
- return simgrid::simix::simcall([this]() { return pimpl_vm_->get_state(); });
-}
-
-size_t VirtualMachine::get_ramsize()
-{
- return pimpl_vm_->get_ramsize();
-}
-
-void VirtualMachine::set_ramsize(size_t ramsize)
-{
- pimpl_vm_->set_ramsize(ramsize);
-}
-/** @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.
- */
-void VirtualMachine::set_bound(double bound)
-{
- simgrid::simix::simcall([this, bound]() { pimpl_vm_->set_bound(bound); });
-}
-
-} // 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)
-{
- xbt_assert(sg_host_by_name(name) == nullptr,
- "Cannot create a VM named %s: this name is already used by an host or a VM", name);
-
- return new simgrid::s4u::VirtualMachine(name, pm, coreAmount);
-}
-
-const char* sg_vm_get_name(sg_vm_t vm)
-{
- return vm->get_cname();
-}
-
-/** @brief Get the physical host of a given VM. */
-sg_host_t sg_vm_get_pm(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(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(sg_vm_t vm)
-{
- return vm->getState() == simgrid::s4u::VirtualMachine::state::CREATED;
-}
-
-/** @brief Returns whether the given VM is currently running */
-int sg_vm_is_running(sg_vm_t vm)
-{
- return vm->getState() == simgrid::s4u::VirtualMachine::state::RUNNING;
-}
-
-/** @brief Returns whether the given VM is currently suspended, not running. */
-int sg_vm_is_suspended(sg_vm_t vm)
-{
- return vm->getState() == 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.
- * Any memory that they allocated will be leaked, unless you used #MSG_process_on_exit().
- *
- * No extra delay occurs. If you want to simulate this too, you want to use a #MSG_process_sleep().
- */
-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();
-}
