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, const 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, const std::vector<double>& speed_per_pstate,
89 : Cpu(model, host, model->get_maxmin_system()->constraint_new(this, core * speed_per_pstate.front()),
90 speed_per_pstate, core)
94 CpuCas01::~CpuCas01() = default;
96 bool CpuCas01::is_used()
98 return get_model()->get_maxmin_system()->constraint_used(get_constraint());
101 /** @brief take into account changes of speed (either load or max) */
102 void CpuCas01::on_speed_change()
104 kernel::lmm::Variable* var = nullptr;
105 const kernel::lmm::Element* elem = nullptr;
107 get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(),
108 get_core_count() * speed_.scale * speed_.peak);
109 while ((var = get_constraint()->get_variable(&elem))) {
110 CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
112 get_model()->get_maxmin_system()->update_variable_bound(action->get_variable(),
113 action->requested_core() * speed_.scale * speed_.peak);
116 Cpu::on_speed_change();
119 void CpuCas01::apply_event(kernel::profile::Event* event, double value)
121 if (event == speed_.event) {
122 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
123 xbt_assert(get_core_count() == 1, "FIXME: add speed scaling code also for constraint_core[i]");
125 speed_.scale = value;
128 tmgr_trace_event_unref(&speed_.event);
129 } else if (event == state_event_) {
130 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
131 xbt_assert(get_core_count() == 1, "FIXME: add state change code also for constraint_core[i]");
135 XBT_VERB("Restart processes on host %s", get_host()->get_cname());
136 get_host()->turn_on();
139 kernel::lmm::Constraint* cnst = get_constraint();
140 kernel::lmm::Variable* var = nullptr;
141 const kernel::lmm::Element* elem = nullptr;
142 double date = surf_get_clock();
144 get_host()->turn_off();
146 while ((var = cnst->get_variable(&elem))) {
147 kernel::resource::Action* action = static_cast<kernel::resource::Action*>(var->get_id());
149 if (action->get_state() == kernel::resource::Action::State::INITED ||
150 action->get_state() == kernel::resource::Action::State::STARTED ||
151 action->get_state() == kernel::resource::Action::State::IGNORED) {
152 action->set_finish_time(date);
153 action->set_state(kernel::resource::Action::State::FAILED);
157 tmgr_trace_event_unref(&state_event_);
160 xbt_die("Unknown event!\n");
164 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
165 CpuAction* CpuCas01::execution_start(double size)
167 return new CpuCas01Action(get_model(), size, not is_on(), speed_.scale * speed_.peak, get_constraint());
170 CpuAction* CpuCas01::execution_start(double size, int requested_cores)
172 return new CpuCas01Action(get_model(), size, not is_on(), speed_.scale * speed_.peak, get_constraint(),
176 CpuAction* CpuCas01::sleep(double duration)
179 duration = std::max(duration, sg_surf_precision);
181 XBT_IN("(%s,%g)", get_cname(), duration);
182 CpuCas01Action* action =
183 new CpuCas01Action(get_model(), 1.0, not is_on(), speed_.scale * speed_.peak, get_constraint());
185 // FIXME: sleep variables should not consume 1.0 in System::expand()
186 action->set_max_duration(duration);
187 action->suspended_ = kernel::resource::Action::SuspendStates::sleeping;
188 if (duration == NO_MAX_DURATION)
189 action->set_state(simgrid::kernel::resource::Action::State::IGNORED);
191 get_model()->get_maxmin_system()->update_variable_weight(action->get_variable(), 0.0);
192 if (get_model()->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY) { // remove action from the heap
193 get_model()->get_action_heap().remove(action);
194 // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
195 // max_duration correctly at the next call to share_resources
196 get_model()->get_modified_set()->push_front(*action);
206 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
207 kernel::lmm::Constraint* constraint, int requested_core)
208 : CpuAction(model, cost, failed,
209 model->get_maxmin_system()->variable_new(this, 1.0 / requested_core, requested_core * speed, 1))
210 , requested_core_(requested_core)
212 if (model->get_update_algorithm() == kernel::resource::Model::UpdateAlgo::LAZY)
214 model->get_maxmin_system()->expand(constraint, get_variable(), 1.0);
217 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
218 kernel::lmm::Constraint* constraint)
219 : CpuCas01Action(model, cost, failed, speed, constraint, /* requested_core */ 1)
223 int CpuCas01Action::requested_core()
225 return requested_core_;
228 CpuCas01Action::~CpuCas01Action()=default;