1 /* Copyright (c) 2013-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include <simgrid/host.h>
9 #include "cpu_cas01.hpp"
10 #include "vm_hl13.hpp"
12 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_vm);
14 void surf_vm_model_init_HL13(){
15 if (surf_cpu_model_vm) {
16 surf_vm_model = new simgrid::surf::VMHL13Model();
17 all_existing_models->push_back(surf_vm_model);
27 VMHL13Model::VMHL13Model() : VMModel() {}
29 void VMHL13Model::updateActionsState(double /*now*/, double /*delta*/) {}
31 VirtualMachine *VMHL13Model::createVM(const char *name, sg_host_t host_PM)
33 VirtualMachine* vm = new VMHL13(this, name, host_PM);
34 VMCreatedCallbacks(vm);
38 /* In the real world, processes on the guest operating system will be somewhat degraded due to virtualization overhead.
39 * The total CPU share these processes get is smaller than that of the VM process gets on a host operating system. */
40 // const double virt_overhead = 0.95;
41 const double virt_overhead = 1;
43 double VMHL13Model::next_occuring_event(double now)
45 /* TODO: update action's cost with the total cost of processes on the VM. */
47 /* 1. Now we know how many resource should be assigned to each virtual
48 * machine. We update constraints of the virtual machine layer.
50 * If we have two virtual machine (VM1 and VM2) on a physical machine (PM1).
51 * X1 + X2 = C (Equation 1)
53 * the resource share of VM1: X1
54 * the resource share of VM2: X2
55 * the capacity of PM1: C
57 * Then, if we have two process (P1 and P2) on VM1.
58 * X1_1 + X1_2 = X1 (Equation 2)
60 * the resource share of P1: X1_1
61 * the resource share of P2: X1_2
62 * the capacity of VM1: X1
64 * Equation 1 was solved in the physical machine layer.
65 * Equation 2 is solved in the virtual machine layer (here).
66 * X1 must be passed to the virtual machine laye as a constraint value.
69 /* iterate for all virtual machines */
70 for (VMModel::vm_list_t::iterator iter = VMModel::ws_vms.begin(); iter != VMModel::ws_vms.end(); ++iter) {
71 VirtualMachine *ws_vm = &*iter;
72 Cpu *cpu = ws_vm->p_cpu;
73 xbt_assert(cpu, "cpu-less host");
75 double solved_value = ws_vm->action_->getVariable()->value;
76 XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value, ws_vm->getName(), ws_vm->getPm()->name().c_str());
78 // TODO: check lmm_update_constraint_bound() works fine instead of the below manual substitution.
79 // cpu_cas01->constraint->bound = solved_value;
80 xbt_assert(cpu->getModel() == surf_cpu_model_vm);
81 lmm_system_t vcpu_system = cpu->getModel()->getMaxminSystem();
82 lmm_update_constraint_bound(vcpu_system, cpu->getConstraint(), virt_overhead * solved_value);
85 /* 2. Calculate resource share at the virtual machine layer. */
86 adjustWeightOfDummyCpuActions();
88 /* 3. Ready. Get the next occuring event */
89 return surf_cpu_model_vm->next_occuring_event(now);
95 VMHL13::VMHL13(VMModel *model, const char* name, sg_host_t host_PM)
96 : VirtualMachine(model, name, host_PM)
98 /* Currently, we assume a VM has no storage. */
101 /* Currently, a VM uses the network resource of its physical host. In
102 * host_lib, this network resource object is referred from two different keys.
103 * When deregistering the reference that points the network resource object
104 * from the VM name, we have to make sure that the system does not call the
105 * free callback for the network resource object. The network resource object
106 * is still used by the physical machine. */
107 sg_host_t host_VM = simgrid::s4u::Host::by_name_or_create(name);
108 host_VM->pimpl_netcard = host_PM->pimpl_netcard;
110 p_vm_state = SURF_VM_STATE_CREATED;
112 // //// CPU RELATED STUFF ////
113 // Roughly, create a vcpu resource by using the values of the sub_cpu one.
114 CpuCas01 *sub_cpu = static_cast<CpuCas01*>(host_PM->pimpl_cpu);
116 p_cpu = surf_cpu_model_vm->createCpu(host_VM, // the machine hosting the VM
117 sub_cpu->getSpeedPeakList(), 1 /*cores*/);
118 if (sub_cpu->getPState() != 0)
119 p_cpu->setPState(sub_cpu->getPState());
121 /* We create cpu_action corresponding to a VM process on the host operating system. */
122 /* FIXME: TODO: we have to periodically input GUESTOS_NOISE to the system? how ? */
123 action_ = sub_cpu->execution_start(0);
125 XBT_VERB("Create VM(%s)@PM(%s) with %ld mounted disks", name, hostPM_->name().c_str(), xbt_dynar_length(p_storage));
131 void VMHL13::suspend()
134 p_vm_state = SURF_VM_STATE_SUSPENDED;
137 void VMHL13::resume()
140 p_vm_state = SURF_VM_STATE_RUNNING;
145 p_vm_state = SURF_VM_STATE_SAVING;
147 /* FIXME: do something here */
149 p_vm_state = SURF_VM_STATE_SAVED;
152 void VMHL13::restore()
154 p_vm_state = SURF_VM_STATE_RESTORING;
156 /* FIXME: do something here */
158 p_vm_state = SURF_VM_STATE_RUNNING;
161 /* Update the physical host of the given VM */
162 void VMHL13::migrate(sg_host_t host_dest)
164 HostImpl *surfHost_dst = host_dest->extension<HostImpl>();
165 const char *vm_name = getName();
166 const char *pm_name_src = hostPM_->name().c_str();
167 const char *pm_name_dst = surfHost_dst->getName();
169 /* update net_elm with that of the destination physical host */
170 sg_host_by_name(vm_name)->pimpl_netcard = sg_host_by_name(pm_name_dst)->pimpl_netcard;
174 /* Update vcpu's action for the new pm */
176 /* create a cpu action bound to the pm model at the destination. */
177 CpuAction *new_cpu_action = static_cast<CpuAction*>(host_dest->pimpl_cpu->execution_start(0));
179 Action::State state = action_->getState();
180 if (state != Action::State::done)
181 XBT_CRITICAL("FIXME: may need a proper handling, %d", static_cast<int>(state));
182 if (action_->getRemainsNoUpdate() > 0)
183 XBT_CRITICAL("FIXME: need copy the state(?), %f", action_->getRemainsNoUpdate());
185 /* keep the bound value of the cpu action of the VM. */
186 double old_bound = action_->getBound();
187 if (old_bound != 0) {
188 XBT_DEBUG("migrate VM(%s): set bound (%f) at %s", vm_name, old_bound, pm_name_dst);
189 new_cpu_action->setBound(old_bound);
192 XBT_ATTRIB_UNUSED int ret = action_->unref();
193 xbt_assert(ret == 1, "Bug: some resource still remains");
195 action_ = new_cpu_action;
198 XBT_DEBUG("migrate VM(%s): change PM (%s to %s)", vm_name, pm_name_src, pm_name_dst);
201 void VMHL13::setBound(double bound){
202 action_->setBound(bound);