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"
7 #include "simgrid/sg_config.hpp"
8 #include "src/surf/surf_interface.hpp"
9 #include "surf/surf.hpp"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu, "Logging specific to the SURF CPU module");
17 static simgrid::config::Flag<std::string>
18 cpu_optim_opt("cpu/optim", "Optimization algorithm to use for CPU resources. ", "Lazy",
20 std::map<std::string, std::string>({
21 {"Lazy", "Lazy action management (partial invalidation in lmm + heap in action remaining)."},
22 {"TI", "Trace integration. Highly optimized mode when using availability traces (only available "
23 "for the Cas01 CPU model for now)."},
24 {"Full", "Full update of remaining and variables. Slow but may be useful when debugging."},
27 [](std::string const& val) {
28 xbt_assert(_sg_cfg_init_status < 2,
29 "Cannot change the optimization algorithm after the initialization");
35 void surf_cpu_model_init_Cas01()
37 xbt_assert(not surf_cpu_model_pm);
38 xbt_assert(not surf_cpu_model_vm);
40 if (cpu_optim_opt == "TI") {
41 surf_cpu_model_init_ti();
45 simgrid::kernel::resource::Model::UpdateAlgo algo;
46 if (cpu_optim_opt == "Lazy")
47 algo = simgrid::kernel::resource::Model::UpdateAlgo::Lazy;
49 algo = simgrid::kernel::resource::Model::UpdateAlgo::Full;
51 surf_cpu_model_pm = new simgrid::surf::CpuCas01Model(algo);
52 all_existing_models->push_back(surf_cpu_model_pm);
54 surf_cpu_model_vm = new simgrid::surf::CpuCas01Model(algo);
55 all_existing_models->push_back(surf_cpu_model_vm);
61 CpuCas01Model::CpuCas01Model(kernel::resource::Model::UpdateAlgo algo) : simgrid::surf::CpuModel(algo)
63 bool select = simgrid::config::get_value<bool>("cpu/maxmin-selective-update");
65 if (algo == Model::UpdateAlgo::Lazy) {
66 xbt_assert(select || simgrid::config::is_default("cpu/maxmin-selective-update"),
67 "You cannot disable cpu selective update when using the lazy update mechanism");
71 set_maxmin_system(new simgrid::kernel::lmm::System(select));
74 CpuCas01Model::~CpuCas01Model()
76 surf_cpu_model_pm = nullptr;
79 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
81 return new CpuCas01(this, host, speedPerPstate, core);
87 CpuCas01::CpuCas01(CpuCas01Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
88 : Cpu(model, host, model->get_maxmin_system()->constraint_new(this, core * speedPerPstate->front()), speedPerPstate,
95 if (get_model() == surf_cpu_model_pm)
96 speedPerPstate_.clear();
99 std::vector<double> * CpuCas01::getSpeedPeakList(){
100 return &speedPerPstate_;
103 bool CpuCas01::is_used()
105 return get_model()->get_maxmin_system()->constraint_used(get_constraint());
108 /** @brief take into account changes of speed (either load or max) */
109 void CpuCas01::onSpeedChange() {
110 kernel::lmm::Variable* var = nullptr;
111 const kernel::lmm::Element* elem = nullptr;
113 get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(),
114 coresAmount_ * speed_.scale * speed_.peak);
115 while ((var = get_constraint()->get_variable(&elem))) {
116 CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
118 get_model()->get_maxmin_system()->update_variable_bound(action->get_variable(),
119 action->requestedCore() * speed_.scale * speed_.peak);
122 Cpu::onSpeedChange();
125 void CpuCas01::apply_event(tmgr_trace_event_t event, double value)
127 if (event == speed_.event) {
128 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
129 xbt_assert(coresAmount_ == 1, "FIXME: add speed scaling code also for constraint_core[i]");
131 speed_.scale = value;
134 tmgr_trace_event_unref(&speed_.event);
135 } else if (event == stateEvent_) {
136 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
137 xbt_assert(coresAmount_ == 1, "FIXME: add state change code also for constraint_core[i]");
141 host_that_restart.push_back(getHost());
144 kernel::lmm::Constraint* cnst = get_constraint();
145 kernel::lmm::Variable* var = nullptr;
146 const kernel::lmm::Element* elem = nullptr;
147 double date = surf_get_clock();
151 while ((var = cnst->get_variable(&elem))) {
152 kernel::resource::Action* action = static_cast<kernel::resource::Action*>(var->get_id());
154 if (action->get_state() == kernel::resource::Action::State::running ||
155 action->get_state() == kernel::resource::Action::State::ready ||
156 action->get_state() == kernel::resource::Action::State::not_in_the_system) {
157 action->set_finish_time(date);
158 action->set_state(kernel::resource::Action::State::failed);
162 tmgr_trace_event_unref(&stateEvent_);
165 xbt_die("Unknown event!\n");
169 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
170 CpuAction* CpuCas01::execution_start(double size)
172 return new CpuCas01Action(get_model(), size, is_off(), speed_.scale * speed_.peak, get_constraint());
175 CpuAction* CpuCas01::execution_start(double size, int requestedCores)
177 return new CpuCas01Action(get_model(), size, is_off(), speed_.scale * speed_.peak, get_constraint(), requestedCores);
180 CpuAction *CpuCas01::sleep(double duration)
183 duration = std::max(duration, sg_surf_precision);
185 XBT_IN("(%s,%g)", get_cname(), duration);
186 CpuCas01Action* action = new CpuCas01Action(get_model(), 1.0, is_off(), speed_.scale * speed_.peak, get_constraint());
188 // FIXME: sleep variables should not consume 1.0 in System::expand()
189 action->set_max_duration(duration);
190 action->suspended_ = kernel::resource::Action::SuspendStates::sleeping;
191 if (duration < 0) { // NO_MAX_DURATION
192 /* Move to the *end* of the corresponding action set. This convention is used to speed up update_resource_state */
193 simgrid::xbt::intrusive_erase(*action->get_state_set(), *action);
194 action->state_set_ = &static_cast<CpuCas01Model*>(get_model())->cpuRunningActionSetThatDoesNotNeedBeingChecked_;
195 action->get_state_set()->push_back(*action);
198 get_model()->get_maxmin_system()->update_variable_weight(action->get_variable(), 0.0);
199 if (get_model()->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::Lazy) { // remove action from the heap
200 get_model()->get_action_heap().remove(action);
201 // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
202 // max_duration correctly at the next call to share_resources
203 get_model()->get_modified_set()->push_front(*action);
213 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
214 kernel::lmm::Constraint* constraint, int requestedCore)
215 : CpuAction(model, cost, failed,
216 model->get_maxmin_system()->variable_new(this, 1.0 / requestedCore, requestedCore * speed, 1))
217 , requestedCore_(requestedCore)
219 if (model->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::Lazy) {
223 model->get_maxmin_system()->expand(constraint, get_variable(), 1.0);
226 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
227 kernel::lmm::Constraint* constraint)
228 : CpuCas01Action(model, cost, failed, speed, constraint, 1)
232 int CpuCas01Action::requestedCore()
234 return requestedCore_;
237 CpuCas01Action::~CpuCas01Action()=default;