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 "cpu_cas01.hpp"
10 #include "vm_hl13.hpp"
12 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_vm);
14 void surf_vm_model_init_HL13(void){
15 if (surf_cpu_model_vm) {
16 surf_vm_model = new simgrid::surf::VMHL13Model();
17 simgrid::surf::Model *model = surf_vm_model;
18 xbt_dynar_push(all_existing_models, &model);
29 VMHL13Model::VMHL13Model() : VMModel() {}
31 void VMHL13Model::updateActionsState(double /*now*/, double /*delta*/) {}
33 /* ind means ''indirect'' that this is a reference on the whole dict_elm
34 * structure (i.e not on the surf_resource_private infos) */
36 VirtualMachine *VMHL13Model::createVM(const char *name, sg_host_t host_PM)
38 VirtualMachine* vm = new VMHL13(this, name, NULL, host_PM);
39 surf_callback_emit(VMCreatedCallbacks, vm);
43 static inline double get_solved_value(CpuAction *cpu_action)
45 return cpu_action->getVariable()->value;
48 /* In the real world, processes on the guest operating system will be somewhat
49 * degraded due to virtualization overhead. The total CPU share that these
50 * processes get is smaller than that of the VM process gets on a host
51 * operating system. */
52 // const double virt_overhead = 0.95;
53 const double virt_overhead = 1;
55 double VMHL13Model::shareResources(double now)
57 /* TODO: update action's cost with the total cost of processes on the VM. */
59 /* 1. Now we know how many resource should be assigned to each virtual
60 * machine. We update constraints of the virtual machine layer.
63 * If we have two virtual machine (VM1 and VM2) on a physical machine (PM1).
64 * X1 + X2 = C (Equation 1)
66 * the resource share of VM1: X1
67 * the resource share of VM2: X2
68 * the capacity of PM1: C
70 * Then, if we have two process (P1 and P2) on VM1.
71 * X1_1 + X1_2 = X1 (Equation 2)
73 * the resource share of P1: X1_1
74 * the resource share of P2: X1_2
75 * the capacity of VM1: X1
77 * Equation 1 was solved in the physical machine layer.
78 * Equation 2 is solved in the virtual machine layer (here).
79 * X1 must be passed to the virtual machine laye as a constraint value.
83 /* iterate for all virtual machines */
84 for (VMModel::vm_list_t::iterator iter =
85 VMModel::ws_vms.begin();
86 iter != VMModel::ws_vms.end(); ++iter) {
88 VirtualMachine *ws_vm = &*iter;
89 Cpu *cpu = ws_vm->p_cpu;
90 xbt_assert(cpu, "cpu-less host");
92 double solved_value = get_solved_value(ws_vm->p_action);
93 XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value,
94 ws_vm->getName(), ws_vm->p_subWs->getName());
96 // TODO: check lmm_update_constraint_bound() works fine instead of the below manual substitution.
97 // cpu_cas01->constraint->bound = solved_value;
98 xbt_assert(cpu->getModel() == surf_cpu_model_vm);
99 lmm_system_t vcpu_system = cpu->getModel()->getMaxminSystem();
100 lmm_update_constraint_bound(vcpu_system, cpu->getConstraint(), virt_overhead * solved_value);
104 /* 2. Calculate resource share at the virtual machine layer. */
105 adjustWeightOfDummyCpuActions();
107 double min_by_cpu = surf_cpu_model_vm->shareResources(now);
108 double min_by_net = surf_network_model->shareResourcesIsIdempotent() ? surf_network_model->shareResources(now) : -1;
109 // Fixme: take storage into account once it's implemented
110 double min_by_sto = -1;
112 XBT_DEBUG("model %p, %s min_by_cpu %f, %s min_by_net %f, %s min_by_sto %f",
113 this, typeid(surf_cpu_model_pm ).name(), min_by_cpu,
114 typeid(surf_network_model).name(), min_by_net,
115 typeid(surf_storage_model).name(), min_by_sto);
117 double ret = std::max(std::max(min_by_cpu, min_by_net), min_by_sto);
118 if (min_by_cpu >= 0.0 && min_by_cpu < ret)
120 if (min_by_net >= 0.0 && min_by_net < ret)
122 if (min_by_sto >= 0.0 && min_by_sto < ret)
128 Action *VMHL13Model::executeParallelTask(int host_nb,
129 sg_host_t *host_list,
130 double *flops_amount,
131 double *bytes_amount,
133 #define cost_or_zero(array,pos) ((array)?(array)[pos]:0.0)
135 && (cost_or_zero(bytes_amount, 0) == 0.0))
136 return surf_host_execute(host_list[0], flops_amount[0]);
137 else if ((host_nb == 1)
138 && (cost_or_zero(flops_amount, 0) == 0.0))
139 return surf_network_model_communicate(surf_network_model, host_list[0], host_list[0],bytes_amount[0], rate);
140 else if ((host_nb == 2)
141 && (cost_or_zero(flops_amount, 0) == 0.0)
142 && (cost_or_zero(flops_amount, 1) == 0.0)) {
146 for (i = 0; i < host_nb * host_nb; i++) {
147 if (cost_or_zero(bytes_amount, i) > 0.0) {
149 value = cost_or_zero(bytes_amount, i);
153 return surf_network_model_communicate(surf_network_model, host_list[0], host_list[1], value, rate);
157 THROW_UNIMPLEMENTED; /* This model does not implement parallel tasks for more than 2 hosts. */
165 VMHL13::VMHL13(VMModel *model, const char* name, xbt_dict_t props,
167 : VirtualMachine(model, name, props, NULL, NULL)
169 Host *sub_ws = surf_host_resource_priv(host_PM);
171 /* Currently, we assume a VM has no storage. */
174 /* Currently, a VM uses the network resource of its physical host. In
175 * host_lib, this network resource object is referred from two different keys.
176 * When deregistering the reference that points the network resource object
177 * from the VM name, we have to make sure that the system does not call the
178 * free callback for the network resource object. The network resource object
179 * is still used by the physical machine. */
180 sg_host_t sg_sub_ws = sg_host_by_name_or_create(sub_ws->getName());
181 p_netElm = new RoutingEdgeWrapper(sg_host_edge(sg_sub_ws));
182 sg_host_edge_set(sg_host_by_name_or_create(name), p_netElm);
185 p_currentState = SURF_VM_STATE_CREATED;
187 // //// CPU RELATED STUFF ////
188 // Roughly, create a vcpu resource by using the values of the sub_cpu one.
189 CpuCas01 *sub_cpu = static_cast<CpuCas01*>(sg_host_surfcpu(host_PM));
191 p_cpu = surf_cpu_model_vm->createCpu(name, // name
192 sub_cpu->getSpeedPeakList(), // host->power_peak,
193 sub_cpu->getPState(),
194 1, // host->power_scale,
195 NULL, // host->power_trace,
196 1, // host->core_amount,
197 SURF_RESOURCE_ON, // host->initial_state,
198 NULL, // host->state_trace,
199 NULL); // host->properties,
201 /* We create cpu_action corresponding to a VM process on the host operating system. */
202 /* FIXME: TODO: we have to periodically input GUESTOS_NOISE to the system? how ? */
203 // vm_ws->cpu_action = surf_cpu_model_pm->extension.cpu.execute(host_PM, GUESTOS_NOISE);
204 p_action = sub_cpu->execute(0);
206 XBT_INFO("Create VM(%s)@PM(%s) with %ld mounted disks", name, sub_ws->getName(), xbt_dynar_length(p_storage));
210 * A physical host does not disappear in the current SimGrid code, but a VM may
211 * disappear during a simulation.
215 /* Free the cpu_action of the VM. */
216 XBT_ATTRIB_UNUSED int ret = p_action->unref();
217 xbt_assert(ret == 1, "Bug: some resource still remains");
220 void VMHL13::updateState(tmgr_trace_event_t /*event_type*/, double /*value*/, double /*date*/) {
221 THROW_IMPOSSIBLE; /* This model does not implement parallel tasks */
224 bool VMHL13::isUsed() {
225 THROW_IMPOSSIBLE; /* This model does not implement parallel tasks */
229 e_surf_resource_state_t VMHL13::getState()
231 return (e_surf_resource_state_t) p_currentState;
234 void VMHL13::setState(e_surf_resource_state_t state)
236 p_currentState = (e_surf_vm_state_t) state;
239 void VMHL13::suspend()
242 p_currentState = SURF_VM_STATE_SUSPENDED;
245 void VMHL13::resume()
248 p_currentState = SURF_VM_STATE_RUNNING;
253 p_currentState = SURF_VM_STATE_SAVING;
255 /* FIXME: do something here */
257 p_currentState = SURF_VM_STATE_SAVED;
260 void VMHL13::restore()
262 p_currentState = SURF_VM_STATE_RESTORING;
264 /* FIXME: do something here */
266 p_currentState = SURF_VM_STATE_RUNNING;
270 * Update the physical host of the given VM
272 void VMHL13::migrate(sg_host_t ind_dst_pm)
274 /* ind_dst_pm equals to smx_host_t */
275 Host *ws_dst = static_cast<Host*>(surf_host_resource_priv(ind_dst_pm));
276 const char *vm_name = getName();
277 const char *pm_name_src = p_subWs->getName();
278 const char *pm_name_dst = ws_dst->getName();
282 /* update net_elm with that of the destination physical host */
283 RoutingEdge *old_net_elm = p_netElm;
284 RoutingEdge *new_net_elm = new RoutingEdgeWrapper(sg_host_edge(sg_host_by_name(pm_name_dst)));
285 xbt_assert(new_net_elm);
287 /* Unregister the current net_elm from host_lib. Do not call the free callback. */
288 sg_host_edge_destroy(sg_host_by_name(vm_name), 0);
290 /* Then, resister the new one. */
291 p_netElm = new_net_elm;
292 sg_host_edge_set(sg_host_by_name(vm_name), p_netElm);
296 /* Update vcpu's action for the new pm */
298 /* create a cpu action bound to the pm model at the destination. */
299 CpuAction *new_cpu_action = static_cast<CpuAction*>(
300 static_cast<Cpu*>(sg_host_surfcpu(ind_dst_pm))->execute(0));
302 e_surf_action_state_t state = p_action->getState();
303 if (state != SURF_ACTION_DONE)
304 XBT_CRITICAL("FIXME: may need a proper handling, %d", state);
305 if (p_action->getRemainsNoUpdate() > 0)
306 XBT_CRITICAL("FIXME: need copy the state(?), %f", p_action->getRemainsNoUpdate());
308 /* keep the bound value of the cpu action of the VM. */
309 double old_bound = p_action->getBound();
310 if (old_bound != 0) {
311 XBT_DEBUG("migrate VM(%s): set bound (%f) at %s", vm_name, old_bound, pm_name_dst);
312 new_cpu_action->setBound(old_bound);
315 XBT_ATTRIB_UNUSED int ret = p_action->unref();
316 xbt_assert(ret == 1, "Bug: some resource still remains");
318 p_action = new_cpu_action;
321 XBT_DEBUG("migrate VM(%s): change net_elm (%p to %p)", vm_name, old_net_elm, new_net_elm);
322 XBT_DEBUG("migrate VM(%s): change PM (%s to %s)", vm_name, pm_name_src, pm_name_dst);
326 void VMHL13::setBound(double bound){
327 p_action->setBound(bound);
330 void VMHL13::setAffinity(Cpu *cpu, unsigned long mask){
331 p_action->setAffinity(cpu, mask);
335 * A surf level object will be useless in the upper layer. Returning the
336 * dict_elm of the host.
338 sg_host_t VMHL13::getPm()
340 // TODO, store pointer to the PM?
341 return simgrid::Host::find_host(p_subWs->getName());
344 /* Adding a task to a VM updates the VCPU task on its physical machine. */
345 Action *VMHL13::execute(double size)
347 double old_cost = p_action->getCost();
348 double new_cost = old_cost + size;
350 XBT_DEBUG("VM(%s)@PM(%s): update dummy action's cost (%f -> %f)",
351 getName(), p_subWs->getName(),
354 p_action->setCost(new_cost);
356 return p_cpu->execute(size);
359 Action *VMHL13::sleep(double duration) {
360 return p_cpu->sleep(duration);