1 /* Copyright (c) 2009-2011, 2013-2017. 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 "cpu_cas01.hpp"
9 #include "simgrid/sg_config.h"
10 #include "src/kernel/lmm/maxmin.hpp"
11 #include "xbt/utility.hpp"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu, "Logging specific to the SURF CPU IMPROVED module");
19 void surf_cpu_model_init_Cas01()
21 xbt_assert(not surf_cpu_model_pm);
22 xbt_assert(not surf_cpu_model_vm);
24 if (xbt_cfg_get_string("cpu/optim") == "TI") {
25 surf_cpu_model_init_ti();
29 surf_cpu_model_pm = new simgrid::surf::CpuCas01Model();
30 all_existing_models->push_back(surf_cpu_model_pm);
32 surf_cpu_model_vm = new simgrid::surf::CpuCas01Model();
33 all_existing_models->push_back(surf_cpu_model_vm);
39 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
41 std::string optim = xbt_cfg_get_string("cpu/optim");
42 bool select = xbt_cfg_get_boolean("cpu/maxmin-selective-update");
44 if (optim == "Full") {
45 setUpdateMechanism(UM_FULL);
46 selectiveUpdate_ = select;
47 } else if (optim == "Lazy") {
48 setUpdateMechanism(UM_LAZY);
49 selectiveUpdate_ = true;
50 xbt_assert(select || (xbt_cfg_is_default_value("cpu/maxmin-selective-update")),
51 "Disabling selective update while using the lazy update mechanism is dumb!");
53 xbt_die("Unsupported optimization (%s) for this model", optim.c_str());
56 maxminSystem_ = new simgrid::kernel::lmm::s_lmm_system_t(selectiveUpdate_);
58 if (getUpdateMechanism() == UM_LAZY) {
59 modifiedSet_ = new ActionLmmList();
60 maxminSystem_->keep_track = modifiedSet_;
64 CpuCas01Model::~CpuCas01Model()
67 maxminSystem_ = nullptr;
70 surf_cpu_model_pm = nullptr;
73 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
75 return new CpuCas01(this, host, speedPerPstate, core);
81 CpuCas01::CpuCas01(CpuCas01Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
82 : Cpu(model, host, model->getMaxminSystem()->constraint_new(this, core * speedPerPstate->front()), speedPerPstate,
89 if (model() == surf_cpu_model_pm)
90 speedPerPstate_.clear();
93 std::vector<double> * CpuCas01::getSpeedPeakList(){
94 return &speedPerPstate_;
97 bool CpuCas01::isUsed()
99 return model()->getMaxminSystem()->constraint_used(constraint());
102 /** @brief take into account changes of speed (either load or max) */
103 void CpuCas01::onSpeedChange() {
104 lmm_variable_t var = nullptr;
105 const_lmm_element_t elem = nullptr;
107 model()->getMaxminSystem()->update_constraint_bound(constraint(), coresAmount_ * speed_.scale * speed_.peak);
108 while ((var = constraint()->get_variable(&elem))) {
109 CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
111 model()->getMaxminSystem()->update_variable_bound(action->getVariable(),
112 action->requestedCore() * speed_.scale * speed_.peak);
115 Cpu::onSpeedChange();
118 void CpuCas01::apply_event(tmgr_trace_event_t event, double value)
120 if (event == speed_.event) {
121 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
122 xbt_assert(coresAmount_ == 1, "FIXME: add speed scaling code also for constraint_core[i]");
124 speed_.scale = value;
127 tmgr_trace_event_unref(&speed_.event);
128 } else if (event == stateEvent_) {
129 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
130 xbt_assert(coresAmount_ == 1, "FIXME: add state change code also for constraint_core[i]");
134 host_that_restart.push_back(getHost());
137 lmm_constraint_t cnst = constraint();
138 lmm_variable_t var = nullptr;
139 const_lmm_element_t elem = nullptr;
140 double date = surf_get_clock();
144 while ((var = cnst->get_variable(&elem))) {
145 Action* action = static_cast<Action*>(var->get_id());
147 if (action->getState() == Action::State::running ||
148 action->getState() == Action::State::ready ||
149 action->getState() == Action::State::not_in_the_system) {
150 action->setFinishTime(date);
151 action->setState(Action::State::failed);
155 tmgr_trace_event_unref(&stateEvent_);
158 xbt_die("Unknown event!\n");
162 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
163 CpuAction *CpuCas01::execution_start(double size)
165 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint());
167 CpuAction* CpuCas01::execution_start(double size, int requestedCores)
169 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint(), requestedCores);
172 CpuAction *CpuCas01::sleep(double duration)
175 duration = std::max(duration, sg_surf_precision);
177 XBT_IN("(%s,%g)", getCname(), duration);
178 CpuCas01Action* action = new CpuCas01Action(model(), 1.0, isOff(), speed_.scale * speed_.peak, constraint());
180 // FIXME: sleep variables should not consume 1.0 in lmm_expand
181 action->setMaxDuration(duration);
182 action->suspended_ = 2;
183 if (duration < 0) { // NO_MAX_DURATION
184 /* Move to the *end* of the corresponding action set. This convention is used to speed up update_resource_state */
185 simgrid::xbt::intrusive_erase(*action->getStateSet(), *action);
186 action->stateSet_ = &static_cast<CpuCas01Model*>(model())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
187 action->getStateSet()->push_back(*action);
190 model()->getMaxminSystem()->update_variable_weight(action->getVariable(), 0.0);
191 if (model()->getUpdateMechanism() == UM_LAZY) { // remove action from the heap
192 action->heapRemove(model()->getActionHeap());
193 // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
194 // max_duration correctly at the next call to share_resources
195 model()->getModifiedSet()->push_front(*action);
205 CpuCas01Action::CpuCas01Action(Model* model, double cost, bool failed, double speed, lmm_constraint_t constraint,
207 : CpuAction(model, cost, failed,
208 model->getMaxminSystem()->variable_new(this, 1.0 / requestedCore, requestedCore * speed, 1))
209 , requestedCore_(requestedCore)
211 if (model->getUpdateMechanism() == UM_LAZY) {
215 model->getMaxminSystem()->expand(constraint, getVariable(), 1.0);
218 CpuCas01Action::CpuCas01Action(Model* model, double cost, bool failed, double speed, lmm_constraint_t constraint)
219 : CpuCas01Action(model, cost, failed, speed, constraint, 1)
223 int CpuCas01Action::requestedCore()
225 return requestedCore_;
228 CpuCas01Action::~CpuCas01Action()=default;