1 /* Copyright (c) 2009-2019. 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/cpu_ti.hpp"
9 #include "src/surf/surf_interface.hpp"
10 #include "surf/surf.hpp"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu, "Logging specific to the SURF CPU module");
18 static simgrid::config::Flag<std::string>
19 cpu_optim_opt("cpu/optim", "Optimization algorithm to use for CPU resources. ", "Lazy",
21 std::map<std::string, std::string>({
22 {"Lazy", "Lazy action management (partial invalidation in lmm + heap in action remaining)."},
23 {"TI", "Trace integration. Highly optimized mode when using availability traces (only available "
24 "for the Cas01 CPU model for now)."},
25 {"Full", "Full update of remaining and variables. Slow but may be useful when debugging."},
28 [](std::string const&) {
29 xbt_assert(_sg_cfg_init_status < 2,
30 "Cannot change the optimization algorithm after the initialization");
36 void surf_cpu_model_init_Cas01()
38 xbt_assert(surf_cpu_model_pm == nullptr, "CPU model already initialized. This should not happen.");
39 xbt_assert(surf_cpu_model_vm == nullptr, "CPU model already initialized. This should not happen.");
41 if (cpu_optim_opt == "TI") {
42 simgrid::surf::CpuTiModel::create_pm_vm_models();
46 simgrid::kernel::resource::Model::UpdateAlgo algo;
47 if (cpu_optim_opt == "Lazy")
48 algo = simgrid::kernel::resource::Model::UpdateAlgo::LAZY;
50 algo = simgrid::kernel::resource::Model::UpdateAlgo::FULL;
52 surf_cpu_model_pm = new simgrid::surf::CpuCas01Model(algo);
53 surf_cpu_model_vm = new simgrid::surf::CpuCas01Model(algo);
59 CpuCas01Model::CpuCas01Model(kernel::resource::Model::UpdateAlgo algo) : simgrid::surf::CpuModel(algo)
61 all_existing_models.push_back(this);
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(kernel::profile::Event* 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 XBT_VERB("Restart processes on host %s", get_host()->get_cname());
135 get_host()->turn_on();
138 kernel::lmm::Constraint* cnst = get_constraint();
139 kernel::lmm::Variable* var = nullptr;
140 const kernel::lmm::Element* elem = nullptr;
141 double date = surf_get_clock();
143 get_host()->turn_off();
145 while ((var = cnst->get_variable(&elem))) {
146 kernel::resource::Action* action = static_cast<kernel::resource::Action*>(var->get_id());
148 if (action->get_state() == kernel::resource::Action::State::INITED ||
149 action->get_state() == kernel::resource::Action::State::STARTED ||
150 action->get_state() == kernel::resource::Action::State::IGNORED) {
151 action->set_finish_time(date);
152 action->set_state(kernel::resource::Action::State::FAILED);
156 tmgr_trace_event_unref(&state_event_);
159 xbt_die("Unknown event!\n");
163 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
164 CpuAction* CpuCas01::execution_start(double size)
166 return new CpuCas01Action(get_model(), size, not is_on(), speed_.scale * speed_.peak, get_constraint());
169 CpuAction* CpuCas01::execution_start(double size, int requested_cores)
171 return new CpuCas01Action(get_model(), size, not is_on(), speed_.scale * speed_.peak, get_constraint(),
175 CpuAction* CpuCas01::sleep(double duration)
178 duration = std::max(duration, sg_surf_precision);
180 XBT_IN("(%s,%g)", get_cname(), duration);
181 CpuCas01Action* action =
182 new CpuCas01Action(get_model(), 1.0, not is_on(), speed_.scale * speed_.peak, get_constraint());
184 // FIXME: sleep variables should not consume 1.0 in System::expand()
185 action->set_max_duration(duration);
186 action->suspended_ = kernel::resource::Action::SuspendStates::sleeping;
187 if (duration == NO_MAX_DURATION)
188 action->set_state(simgrid::kernel::resource::Action::State::IGNORED);
190 get_model()->get_maxmin_system()->update_variable_weight(action->get_variable(), 0.0);
191 if (get_model()->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY) { // remove action from the heap
192 get_model()->get_action_heap().remove(action);
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 get_model()->get_modified_set()->push_front(*action);
205 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
206 kernel::lmm::Constraint* constraint, int requested_core)
207 : CpuAction(model, cost, failed,
208 model->get_maxmin_system()->variable_new(this, 1.0 / requested_core, requested_core * speed, 1))
209 , requested_core_(requested_core)
211 if (model->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY)
213 model->get_maxmin_system()->expand(constraint, get_variable(), 1.0);
216 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
217 kernel::lmm::Constraint* constraint)
218 : CpuCas01Action(model, cost, failed, speed, constraint, /* requested_core */ 1)
222 int CpuCas01Action::requested_core()
224 return requested_core_;
227 CpuCas01Action::~CpuCas01Action()=default;