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. */
9 #include <simgrid/host.h>
11 #include "cpu_cas01.hpp"
12 #include "vm_hl13.hpp"
14 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_vm);
16 void surf_vm_model_init_HL13(void){
17 if (surf_cpu_model_vm) {
18 surf_vm_model = new simgrid::surf::VMHL13Model();
19 simgrid::surf::Model *model = surf_vm_model;
20 xbt_dynar_push(all_existing_models, &model);
31 VMHL13Model::VMHL13Model() : VMModel() {}
33 void VMHL13Model::updateActionsState(double /*now*/, double /*delta*/) {}
35 /* ind means ''indirect'' that this is a reference on the whole dict_elm
36 * structure (i.e not on the surf_resource_private infos) */
38 VirtualMachine *VMHL13Model::createVM(const char *name, sg_host_t host_PM)
40 VirtualMachine* vm = new VMHL13(this, name, NULL, host_PM);
41 VMCreatedCallbacks(vm);
45 static inline double get_solved_value(CpuAction *cpu_action)
47 return cpu_action->getVariable()->value;
50 /* In the real world, processes on the guest operating system will be somewhat
51 * degraded due to virtualization overhead. The total CPU share that these
52 * processes get is smaller than that of the VM process gets on a host
53 * operating system. */
54 // const double virt_overhead = 0.95;
55 const double virt_overhead = 1;
57 double VMHL13Model::shareResources(double now)
59 /* TODO: update action's cost with the total cost of processes on the VM. */
61 /* 1. Now we know how many resource should be assigned to each virtual
62 * machine. We update constraints of the virtual machine layer.
65 * If we have two virtual machine (VM1 and VM2) on a physical machine (PM1).
66 * X1 + X2 = C (Equation 1)
68 * the resource share of VM1: X1
69 * the resource share of VM2: X2
70 * the capacity of PM1: C
72 * Then, if we have two process (P1 and P2) on VM1.
73 * X1_1 + X1_2 = X1 (Equation 2)
75 * the resource share of P1: X1_1
76 * the resource share of P2: X1_2
77 * the capacity of VM1: X1
79 * Equation 1 was solved in the physical machine layer.
80 * Equation 2 is solved in the virtual machine layer (here).
81 * X1 must be passed to the virtual machine laye as a constraint value.
85 /* iterate for all virtual machines */
86 for (VMModel::vm_list_t::iterator iter =
87 VMModel::ws_vms.begin();
88 iter != VMModel::ws_vms.end(); ++iter) {
90 VirtualMachine *ws_vm = &*iter;
91 Cpu *cpu = ws_vm->p_cpu;
92 xbt_assert(cpu, "cpu-less host");
94 double solved_value = get_solved_value(ws_vm->p_action);
95 XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value,
96 ws_vm->getName(), ws_vm->p_hostPM->name().c_str());
98 // TODO: check lmm_update_constraint_bound() works fine instead of the below manual substitution.
99 // cpu_cas01->constraint->bound = solved_value;
100 xbt_assert(cpu->getModel() == surf_cpu_model_vm);
101 lmm_system_t vcpu_system = cpu->getModel()->getMaxminSystem();
102 lmm_update_constraint_bound(vcpu_system, cpu->getConstraint(), virt_overhead * solved_value);
106 /* 2. Calculate resource share at the virtual machine layer. */
107 adjustWeightOfDummyCpuActions();
109 double min_by_cpu = surf_cpu_model_vm->shareResources(now);
110 double min_by_net = surf_network_model->shareResourcesIsIdempotent() ? surf_network_model->shareResources(now) : -1;
111 // Fixme: take storage into account once it's implemented
112 double min_by_sto = -1;
114 XBT_DEBUG("model %p, %s min_by_cpu %f, %s min_by_net %f, %s min_by_sto %f",
115 this, typeid(surf_cpu_model_pm ).name(), min_by_cpu,
116 typeid(surf_network_model).name(), min_by_net,
117 typeid(surf_storage_model).name(), min_by_sto);
119 double ret = std::max(std::max(min_by_cpu, min_by_net), min_by_sto);
120 if (min_by_cpu >= 0.0 && min_by_cpu < ret)
122 if (min_by_net >= 0.0 && min_by_net < ret)
124 if (min_by_sto >= 0.0 && min_by_sto < ret)
134 VMHL13::VMHL13(VMModel *model, const char* name, xbt_dict_t props, sg_host_t host_PM)
135 : VirtualMachine(model, name, props, host_PM)
137 /* Currently, we assume a VM has no storage. */
140 /* Currently, a VM uses the network resource of its physical host. In
141 * host_lib, this network resource object is referred from two different keys.
142 * When deregistering the reference that points the network resource object
143 * from the VM name, we have to make sure that the system does not call the
144 * free callback for the network resource object. The network resource object
145 * is still used by the physical machine. */
146 sg_host_t host_VM = sg_host_by_name_or_create(name);
147 host_VM->pimpl_netcard = host_PM->pimpl_netcard;
149 p_vm_state = SURF_VM_STATE_CREATED;
151 // //// CPU RELATED STUFF ////
152 // Roughly, create a vcpu resource by using the values of the sub_cpu one.
153 CpuCas01 *sub_cpu = static_cast<CpuCas01*>(host_PM->pimpl_cpu);
155 p_cpu = surf_cpu_model_vm->createCpu(host_VM, // the machine hosting the VM
156 sub_cpu->getSpeedPeakList(), // host->power_peak,
157 sub_cpu->getPState(),
158 1, // host->power_scale,
159 NULL, // host->power_trace,
160 1, // host->core_amount,
161 1/*ON*/, // host->initiallyOn,
162 NULL); // host->state_trace,
164 /* We create cpu_action corresponding to a VM process on the host operating system. */
165 /* FIXME: TODO: we have to periodically input GUESTOS_NOISE to the system? how ? */
166 // vm_ws->cpu_action = surf_cpu_model_pm->extension.cpu.execute(host_PM, GUESTOS_NOISE);
167 p_action = sub_cpu->execute(0);
169 XBT_INFO("Create VM(%s)@PM(%s) with %ld mounted disks",
170 name, p_hostPM->name().c_str(), xbt_dynar_length(p_storage));
173 void VMHL13::suspend()
176 p_vm_state = SURF_VM_STATE_SUSPENDED;
179 void VMHL13::resume()
182 p_vm_state = SURF_VM_STATE_RUNNING;
187 p_vm_state = SURF_VM_STATE_SAVING;
189 /* FIXME: do something here */
191 p_vm_state = SURF_VM_STATE_SAVED;
194 void VMHL13::restore()
196 p_vm_state = SURF_VM_STATE_RESTORING;
198 /* FIXME: do something here */
200 p_vm_state = SURF_VM_STATE_RUNNING;
204 * Update the physical host of the given VM
206 void VMHL13::migrate(sg_host_t host_dest)
208 Host *surfHost_dst = host_dest->extension<Host>();
209 const char *vm_name = getName();
210 const char *pm_name_src = p_hostPM->name().c_str();
211 const char *pm_name_dst = surfHost_dst->getName();
213 /* update net_elm with that of the destination physical host */
214 sg_host_by_name(vm_name)->pimpl_netcard = sg_host_by_name(pm_name_dst)->pimpl_netcard;
216 p_hostPM = host_dest;
218 /* Update vcpu's action for the new pm */
220 /* create a cpu action bound to the pm model at the destination. */
221 CpuAction *new_cpu_action = static_cast<CpuAction*>(host_dest->pimpl_cpu->execute(0));
223 e_surf_action_state_t state = p_action->getState();
224 if (state != SURF_ACTION_DONE)
225 XBT_CRITICAL("FIXME: may need a proper handling, %d", state);
226 if (p_action->getRemainsNoUpdate() > 0)
227 XBT_CRITICAL("FIXME: need copy the state(?), %f", p_action->getRemainsNoUpdate());
229 /* keep the bound value of the cpu action of the VM. */
230 double old_bound = p_action->getBound();
231 if (old_bound != 0) {
232 XBT_DEBUG("migrate VM(%s): set bound (%f) at %s", vm_name, old_bound, pm_name_dst);
233 new_cpu_action->setBound(old_bound);
236 XBT_ATTRIB_UNUSED int ret = p_action->unref();
237 xbt_assert(ret == 1, "Bug: some resource still remains");
239 p_action = new_cpu_action;
242 XBT_DEBUG("migrate VM(%s): change PM (%s to %s)", vm_name, pm_name_src, pm_name_dst);
245 void VMHL13::setBound(double bound){
246 p_action->setBound(bound);
249 void VMHL13::setAffinity(Cpu *cpu, unsigned long mask){
250 p_action->setAffinity(cpu, mask);