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::System(selectiveUpdate_);
58 if (getUpdateMechanism() == UM_LAZY) {
59 modifiedSet_ = new ActionLmmList();
60 maxminSystem_->keep_track = modifiedSet_;
64 CpuCas01Model::~CpuCas01Model()
66 surf_cpu_model_pm = nullptr;
69 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
71 return new CpuCas01(this, host, speedPerPstate, core);
77 CpuCas01::CpuCas01(CpuCas01Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
78 : Cpu(model, host, model->getMaxminSystem()->constraint_new(this, core * speedPerPstate->front()), speedPerPstate,
85 if (model() == surf_cpu_model_pm)
86 speedPerPstate_.clear();
89 std::vector<double> * CpuCas01::getSpeedPeakList(){
90 return &speedPerPstate_;
93 bool CpuCas01::isUsed()
95 return model()->getMaxminSystem()->constraint_used(constraint());
98 /** @brief take into account changes of speed (either load or max) */
99 void CpuCas01::onSpeedChange() {
100 lmm_variable_t var = nullptr;
101 const_lmm_element_t elem = nullptr;
103 model()->getMaxminSystem()->update_constraint_bound(constraint(), coresAmount_ * speed_.scale * speed_.peak);
104 while ((var = constraint()->get_variable(&elem))) {
105 CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
107 model()->getMaxminSystem()->update_variable_bound(action->getVariable(),
108 action->requestedCore() * speed_.scale * speed_.peak);
111 Cpu::onSpeedChange();
114 void CpuCas01::apply_event(tmgr_trace_event_t event, double value)
116 if (event == speed_.event) {
117 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
118 xbt_assert(coresAmount_ == 1, "FIXME: add speed scaling code also for constraint_core[i]");
120 speed_.scale = value;
123 tmgr_trace_event_unref(&speed_.event);
124 } else if (event == stateEvent_) {
125 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
126 xbt_assert(coresAmount_ == 1, "FIXME: add state change code also for constraint_core[i]");
130 host_that_restart.push_back(getHost());
133 lmm_constraint_t cnst = constraint();
134 lmm_variable_t var = nullptr;
135 const_lmm_element_t elem = nullptr;
136 double date = surf_get_clock();
140 while ((var = cnst->get_variable(&elem))) {
141 Action* action = static_cast<Action*>(var->get_id());
143 if (action->getState() == Action::State::running ||
144 action->getState() == Action::State::ready ||
145 action->getState() == Action::State::not_in_the_system) {
146 action->setFinishTime(date);
147 action->setState(Action::State::failed);
151 tmgr_trace_event_unref(&stateEvent_);
154 xbt_die("Unknown event!\n");
158 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
159 CpuAction* CpuCas01::execution_start(double size)
161 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint());
164 CpuAction* CpuCas01::execution_start(double size, int requestedCores)
166 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint(), requestedCores);
169 CpuAction *CpuCas01::sleep(double duration)
172 duration = std::max(duration, sg_surf_precision);
174 XBT_IN("(%s,%g)", getCname(), duration);
175 CpuCas01Action* action = new CpuCas01Action(model(), 1.0, isOff(), speed_.scale * speed_.peak, constraint());
177 // FIXME: sleep variables should not consume 1.0 in System::expand()
178 action->setMaxDuration(duration);
179 action->suspended_ = Action::SuspendStates::sleeping;
180 if (duration < 0) { // NO_MAX_DURATION
181 /* Move to the *end* of the corresponding action set. This convention is used to speed up update_resource_state */
182 simgrid::xbt::intrusive_erase(*action->getStateSet(), *action);
183 action->stateSet_ = &static_cast<CpuCas01Model*>(model())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
184 action->getStateSet()->push_back(*action);
187 model()->getMaxminSystem()->update_variable_weight(action->getVariable(), 0.0);
188 if (model()->getUpdateMechanism() == UM_LAZY) { // remove action from the heap
189 action->heapRemove(model()->getActionHeap());
190 // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
191 // max_duration correctly at the next call to share_resources
192 model()->getModifiedSet()->push_front(*action);
202 CpuCas01Action::CpuCas01Action(Model* model, double cost, bool failed, double speed, lmm_constraint_t constraint,
204 : CpuAction(model, cost, failed,
205 model->getMaxminSystem()->variable_new(this, 1.0 / requestedCore, requestedCore * speed, 1))
206 , requestedCore_(requestedCore)
208 if (model->getUpdateMechanism() == UM_LAZY) {
212 model->getMaxminSystem()->expand(constraint, getVariable(), 1.0);
215 CpuCas01Action::CpuCas01Action(Model* model, double cost, bool failed, double speed, lmm_constraint_t constraint)
216 : CpuCas01Action(model, cost, failed, speed, constraint, 1)
220 int CpuCas01Action::requestedCore()
222 return requestedCore_;
225 CpuCas01Action::~CpuCas01Action()=default;