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::create_cpu(simgrid::s4u::Host* host, std::vector<double>* speed_per_pstate, int core)
81 return new CpuCas01(this, host, speed_per_pstate, 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,
93 CpuCas01::~CpuCas01() = default;
95 bool CpuCas01::is_used()
97 return get_model()->get_maxmin_system()->constraint_used(get_constraint());
100 /** @brief take into account changes of speed (either load or max) */
101 void CpuCas01::on_speed_change()
103 kernel::lmm::Variable* var = nullptr;
104 const kernel::lmm::Element* elem = nullptr;
106 get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(),
107 get_core_count() * speed_.scale * speed_.peak);
108 while ((var = get_constraint()->get_variable(&elem))) {
109 CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
111 get_model()->get_maxmin_system()->update_variable_bound(action->get_variable(),
112 action->requested_core() * speed_.scale * speed_.peak);
115 Cpu::on_speed_change();
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(get_core_count() == 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 == state_event_) {
129 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
130 xbt_assert(get_core_count() == 1, "FIXME: add state change code also for constraint_core[i]");
134 host_that_restart.push_back(get_host());
137 kernel::lmm::Constraint* cnst = get_constraint();
138 kernel::lmm::Variable* var = nullptr;
139 const kernel::lmm::Element* elem = nullptr;
140 double date = surf_get_clock();
144 while ((var = cnst->get_variable(&elem))) {
145 kernel::resource::Action* action = static_cast<kernel::resource::Action*>(var->get_id());
147 if (action->get_state() == kernel::resource::Action::State::INITED ||
148 action->get_state() == kernel::resource::Action::State::STARTED ||
149 action->get_state() == kernel::resource::Action::State::IGNORED) {
150 action->set_finish_time(date);
151 action->set_state(kernel::resource::Action::State::FAILED);
155 tmgr_trace_event_unref(&state_event_);
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(get_model(), size, is_off(), speed_.scale * speed_.peak, get_constraint());
168 CpuAction* CpuCas01::execution_start(double size, int requested_cores)
170 return new CpuCas01Action(get_model(), size, is_off(), speed_.scale * speed_.peak, get_constraint(), requested_cores);
173 CpuAction *CpuCas01::sleep(double duration)
176 duration = std::max(duration, sg_surf_precision);
178 XBT_IN("(%s,%g)", get_cname(), duration);
179 CpuCas01Action* action = new CpuCas01Action(get_model(), 1.0, is_off(), speed_.scale * speed_.peak, get_constraint());
181 // FIXME: sleep variables should not consume 1.0 in System::expand()
182 action->set_max_duration(duration);
183 action->suspended_ = kernel::resource::Action::SuspendStates::sleeping;
184 if (duration < 0) // NO_MAX_DURATION
185 action->set_state(simgrid::kernel::resource::Action::State::IGNORED);
187 get_model()->get_maxmin_system()->update_variable_weight(action->get_variable(), 0.0);
188 if (get_model()->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY) { // remove action from the heap
189 get_model()->get_action_heap().remove(action);
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 get_model()->get_modified_set()->push_front(*action);
202 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
203 kernel::lmm::Constraint* constraint, int requested_core)
204 : CpuAction(model, cost, failed,
205 model->get_maxmin_system()->variable_new(this, 1.0 / requested_core, requested_core * speed, 1))
206 , requested_core_(requested_core)
208 if (model->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY)
210 model->get_maxmin_system()->expand(constraint, get_variable(), 1.0);
213 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
214 kernel::lmm::Constraint* constraint)
215 : CpuCas01Action(model, cost, failed, speed, constraint, /* requested_core */ 1)
219 int CpuCas01Action::requested_core()
221 return requested_core_;
224 CpuCas01Action::~CpuCas01Action()=default;