1 /* Copyright (c) 2009-2018. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "cpu_cas01.hpp"
8 #include "simgrid/sg_config.h"
9 #include "src/kernel/lmm/maxmin.hpp"
10 #include "xbt/utility.hpp"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu, "Logging specific to the SURF CPU IMPROVED module");
18 void surf_cpu_model_init_Cas01()
20 xbt_assert(not surf_cpu_model_pm);
21 xbt_assert(not surf_cpu_model_vm);
23 if (xbt_cfg_get_string("cpu/optim") == "TI") {
24 surf_cpu_model_init_ti();
28 surf_cpu_model_pm = new simgrid::surf::CpuCas01Model();
29 all_existing_models->push_back(surf_cpu_model_pm);
31 surf_cpu_model_vm = new simgrid::surf::CpuCas01Model();
32 all_existing_models->push_back(surf_cpu_model_vm);
38 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
40 std::string optim = xbt_cfg_get_string("cpu/optim");
41 bool select = xbt_cfg_get_boolean("cpu/maxmin-selective-update");
43 if (optim == "Full") {
44 setUpdateMechanism(UM_FULL);
45 selectiveUpdate_ = select;
46 } else if (optim == "Lazy") {
47 setUpdateMechanism(UM_LAZY);
48 selectiveUpdate_ = true;
49 xbt_assert(select || (xbt_cfg_is_default_value("cpu/maxmin-selective-update")),
50 "Disabling selective update while using the lazy update mechanism is dumb!");
52 xbt_die("Unsupported optimization (%s) for this model", optim.c_str());
55 maxminSystem_ = new simgrid::kernel::lmm::System(selectiveUpdate_);
57 if (getUpdateMechanism() == UM_LAZY) {
58 modifiedSet_ = new kernel::resource::ActionLmmList();
59 maxminSystem_->keep_track = modifiedSet_;
63 CpuCas01Model::~CpuCas01Model()
65 surf_cpu_model_pm = nullptr;
68 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
70 return new CpuCas01(this, host, speedPerPstate, core);
76 CpuCas01::CpuCas01(CpuCas01Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
77 : Cpu(model, host, model->getMaxminSystem()->constraint_new(this, core * speedPerPstate->front()), speedPerPstate,
84 if (model() == surf_cpu_model_pm)
85 speedPerPstate_.clear();
88 std::vector<double> * CpuCas01::getSpeedPeakList(){
89 return &speedPerPstate_;
92 bool CpuCas01::isUsed()
94 return model()->getMaxminSystem()->constraint_used(constraint());
97 /** @brief take into account changes of speed (either load or max) */
98 void CpuCas01::onSpeedChange() {
99 kernel::lmm::Variable* var = nullptr;
100 const_lmm_element_t elem = nullptr;
102 model()->getMaxminSystem()->update_constraint_bound(constraint(), coresAmount_ * speed_.scale * speed_.peak);
103 while ((var = constraint()->get_variable(&elem))) {
104 CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
106 model()->getMaxminSystem()->update_variable_bound(action->getVariable(),
107 action->requestedCore() * speed_.scale * speed_.peak);
110 Cpu::onSpeedChange();
113 void CpuCas01::apply_event(tmgr_trace_event_t event, double value)
115 if (event == speed_.event) {
116 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
117 xbt_assert(coresAmount_ == 1, "FIXME: add speed scaling code also for constraint_core[i]");
119 speed_.scale = value;
122 tmgr_trace_event_unref(&speed_.event);
123 } else if (event == stateEvent_) {
124 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
125 xbt_assert(coresAmount_ == 1, "FIXME: add state change code also for constraint_core[i]");
129 host_that_restart.push_back(getHost());
132 kernel::lmm::Constraint* cnst = constraint();
133 kernel::lmm::Variable* var = nullptr;
134 const_lmm_element_t elem = nullptr;
135 double date = surf_get_clock();
139 while ((var = cnst->get_variable(&elem))) {
140 kernel::resource::Action* action = static_cast<kernel::resource::Action*>(var->get_id());
142 if (action->getState() == kernel::resource::Action::State::running ||
143 action->getState() == kernel::resource::Action::State::ready ||
144 action->getState() == kernel::resource::Action::State::not_in_the_system) {
145 action->setFinishTime(date);
146 action->setState(kernel::resource::Action::State::failed);
150 tmgr_trace_event_unref(&stateEvent_);
153 xbt_die("Unknown event!\n");
157 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
158 CpuAction* CpuCas01::execution_start(double size)
160 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint());
163 CpuAction* CpuCas01::execution_start(double size, int requestedCores)
165 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint(), requestedCores);
168 CpuAction *CpuCas01::sleep(double duration)
171 duration = std::max(duration, sg_surf_precision);
173 XBT_IN("(%s,%g)", getCname(), duration);
174 CpuCas01Action* action = new CpuCas01Action(model(), 1.0, isOff(), speed_.scale * speed_.peak, constraint());
176 // FIXME: sleep variables should not consume 1.0 in System::expand()
177 action->setMaxDuration(duration);
178 action->suspended_ = kernel::resource::Action::SuspendStates::sleeping;
179 if (duration < 0) { // NO_MAX_DURATION
180 /* Move to the *end* of the corresponding action set. This convention is used to speed up update_resource_state */
181 simgrid::xbt::intrusive_erase(*action->getStateSet(), *action);
182 action->stateSet_ = &static_cast<CpuCas01Model*>(model())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
183 action->getStateSet()->push_back(*action);
186 model()->getMaxminSystem()->update_variable_weight(action->getVariable(), 0.0);
187 if (model()->getUpdateMechanism() == UM_LAZY) { // remove action from the heap
188 action->heapRemove(model()->getActionHeap());
189 // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
190 // max_duration correctly at the next call to share_resources
191 model()->getModifiedSet()->push_front(*action);
201 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
202 kernel::lmm::Constraint* constraint, int requestedCore)
203 : CpuAction(model, cost, failed,
204 model->getMaxminSystem()->variable_new(this, 1.0 / requestedCore, requestedCore * speed, 1))
205 , requestedCore_(requestedCore)
207 if (model->getUpdateMechanism() == UM_LAZY) {
211 model->getMaxminSystem()->expand(constraint, getVariable(), 1.0);
214 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
215 kernel::lmm::Constraint* constraint)
216 : CpuCas01Action(model, cost, failed, speed, constraint, 1)
220 int CpuCas01Action::requestedCore()
222 return requestedCore_;
225 CpuCas01Action::~CpuCas01Action()=default;