X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/29d98d1ceb682fbc4c734a92353be4b0bcd5d17b..5f01b2607885913a36ab1c4790079ac5d5c134ac:/src/plugins/vm/s4u_VirtualMachine.cpp diff --git a/src/plugins/vm/s4u_VirtualMachine.cpp b/src/plugins/vm/s4u_VirtualMachine.cpp index 070acd9610..29174e30a2 100644 --- a/src/plugins/vm/s4u_VirtualMachine.cpp +++ b/src/plugins/vm/s4u_VirtualMachine.cpp @@ -1,20 +1,33 @@ -/* Copyright (c) 2015-2016. The SimGrid Team. All rights reserved. */ +/* 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 "src/instr/instr_private.h" +#include "simgrid/s4u/Actor.hpp" +#include "simgrid/vm.h" #include "src/plugins/vm/VirtualMachineImpl.hpp" -#include "src/simix/smx_host_private.h" +#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 VirtualMachine::on_start; +simgrid::xbt::signal VirtualMachine::on_started; +simgrid::xbt::signal VirtualMachine::on_shutdown; +simgrid::xbt::signal VirtualMachine::on_suspend; +simgrid::xbt::signal VirtualMachine::on_resume; VirtualMachine::VirtualMachine(const char* name, s4u::Host* pm, int coreAmount) - : Host(name), pimpl_vm_(new vm::VirtualMachineImpl(this, pm, coreAmount)) + : VirtualMachine(name, pm, coreAmount, 1024) +{ +} + +VirtualMachine::VirtualMachine(const char* name, s4u::Host* pm, int coreAmount, size_t ramsize) + : Host(name), pimpl_vm_(new vm::VirtualMachineImpl(this, pm, coreAmount, ramsize)) { XBT_DEBUG("Create VM %s", name); @@ -23,24 +36,19 @@ VirtualMachine::VirtualMachine(const char* name, s4u::Host* pm, int coreAmount) // Create a VCPU for this VM surf::CpuCas01* sub_cpu = dynamic_cast(pm->pimpl_cpu); - pimpl_cpu = surf_cpu_model_vm->createCpu(this, sub_cpu->getSpeedPeakList(), 1 /*cores*/); + pimpl_cpu = surf_cpu_model_vm->createCpu(this, sub_cpu->getSpeedPeakList(), coreAmount); if (sub_cpu->getPState() != 0) pimpl_cpu->setPState(sub_cpu->getPState()); /* Make a process container */ extension_set(new simgrid::simix::Host()); - - if (TRACE_msg_vm_is_enabled()) { - container_t host_container = PJ_container_get(pm->cname()); - PJ_container_new(name, INSTR_MSG_VM, host_container); - } } VirtualMachine::~VirtualMachine() { onDestruction(*this); - XBT_DEBUG("destroy %s", cname()); + 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... @@ -54,34 +62,233 @@ VirtualMachine::~VirtualMachine() pimpl_netpoint = nullptr; } -bool VirtualMachine::isMigrating() +void VirtualMachine::start() +{ + on_start(*this); + + simgrid::simix::kernelImmediate([this]() { + simgrid::vm::VmHostExt::ensureVmExtInstalled(); + + simgrid::s4u::Host* pm = this->pimpl_vm_->getPm(); + if (pm->extension() == nullptr) + pm->extension_set(new simgrid::vm::VmHostExt()); + + long pm_ramsize = pm->extension()->ramsize; + int pm_overcommit = pm->extension()->overcommit; + long vm_ramsize = this->getRamsize(); + + 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->getPm()) + total_ramsize_of_vms += ws_vm->getRamsize(); + + if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) { + XBT_WARN("cannnot 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_->setState(SURF_VM_STATE_RUNNING); + }); + + on_started(*this); +} + +void VirtualMachine::suspend() { - return pimpl_vm_ && pimpl_vm_->isMigrating; + on_suspend(*this); + smx_actor_t issuer = SIMIX_process_self(); + simgrid::simix::kernelImmediate([this, issuer]() { pimpl_vm_->suspend(issuer); }); } -double VirtualMachine::getRamsize() + +void VirtualMachine::resume() { - return pimpl_vm_->params_.ramsize; + pimpl_vm_->resume(); + on_resume(*this); } -simgrid::s4u::Host* VirtualMachine::pm() + +void VirtualMachine::shutdown() +{ + smx_actor_t issuer = SIMIX_process_self(); + simgrid::simix::kernelImmediate([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::getPm() { return pimpl_vm_->getPm(); } + +void VirtualMachine::setPm(simgrid::s4u::Host* pm) +{ + simgrid::simix::kernelImmediate([this, pm]() { pimpl_vm_->setPm(pm); }); +} + e_surf_vm_state_t VirtualMachine::getState() { - return pimpl_vm_->getState(); + return simgrid::simix::kernelImmediate([this]() { return pimpl_vm_->getState(); }); } -/** @brief Retrieve a copy of the parameters of that VM/PM - * @details The ramsize and overcommit fields are used on the PM too */ -void VirtualMachine::parameters(vm_params_t params) +size_t VirtualMachine::getRamsize() { - pimpl_vm_->getParams(params); + return pimpl_vm_->getRamsize(); } -/** @brief Sets the params of that VM/PM */ -void VirtualMachine::setParameters(vm_params_t params) + +void VirtualMachine::setRamsize(size_t ramsize) { - simgrid::simix::kernelImmediate([&]() { pimpl_vm_->setParams(params); }); + pimpl_vm_->setRamsize(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::setBound(double bound) +{ + simgrid::simix::kernelImmediate([this, bound]() { pimpl_vm_->setBound(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->getPm(); +} + +void sg_vm_set_ramsize(sg_vm_t vm, size_t size) +{ + vm->setRamsize(size); +} + +size_t sg_vm_get_ramsize(sg_vm_t vm) +{ + return vm->getRamsize(); +} + +void sg_vm_set_bound(sg_vm_t vm, double bound) +{ + vm->setBound(bound); +} + +/** @brief Returns whether the given VM has just created, not running. */ +int sg_vm_is_created(sg_vm_t vm) +{ + return vm->getState() == SURF_VM_STATE_CREATED; +} + +/** @brief Returns whether the given VM is currently running */ +int sg_vm_is_running(sg_vm_t vm) +{ + return vm->getState() == SURF_VM_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() == SURF_VM_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(); +}