1 /* Copyright (c) 2013-2021. 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_interface.hpp"
7 #include "src/kernel/resource/profile/Profile.hpp"
8 #include "src/surf/surf_interface.hpp"
9 #include "surf/surf.hpp"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(cpu, resource, "CPU resource");
13 simgrid::kernel::resource::CpuModel* surf_cpu_model_pm;
14 simgrid::kernel::resource::CpuModel* surf_cpu_model_vm;
24 void CpuModel::update_actions_state_lazy(double now, double /*delta*/)
26 while (not get_action_heap().empty() && double_equals(get_action_heap().top_date(), now, sg_surf_precision)) {
27 auto* action = static_cast<CpuAction*>(get_action_heap().pop());
28 XBT_DEBUG("Something happened to action %p", action);
30 action->finish(kernel::resource::Action::State::FINISHED);
31 XBT_DEBUG("Action %p finished", action);
35 void CpuModel::update_actions_state_full(double /*now*/, double delta)
37 for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
38 auto& action = static_cast<CpuAction&>(*it);
39 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
41 action.update_remains(action.get_variable()->get_value() * delta);
42 action.update_max_duration(delta);
44 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
45 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
46 action.finish(Action::State::FINISHED);
54 Cpu::Cpu(Model* model, s4u::Host* host, const std::vector<double>& speed_per_pstate, int core)
55 : Cpu(model, host, nullptr /*constraint*/, speed_per_pstate, core)
59 Cpu::Cpu(Model* model, s4u::Host* host, lmm::Constraint* constraint, const std::vector<double>& speed_per_pstate,
61 : Resource(model, host->get_cname(), constraint)
64 , speed_per_pstate_(speed_per_pstate)
66 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->get_cname());
68 speed_.peak = speed_per_pstate_.front();
70 host->pimpl_cpu = this;
71 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->get_cname());
74 void Cpu::reset_vcpu(Cpu* that)
76 this->pstate_ = that->pstate_;
77 this->speed_ = that->speed_;
78 this->speed_per_pstate_.clear();
79 this->speed_per_pstate_.assign(that->speed_per_pstate_.begin(), that->speed_per_pstate_.end());
82 int Cpu::get_pstate_count() const
84 return speed_per_pstate_.size();
87 void Cpu::set_pstate(int pstate_index)
89 xbt_assert(pstate_index <= static_cast<int>(speed_per_pstate_.size()),
90 "Invalid parameters for CPU %s (pstate %d > length of pstates %d). Please fix your platform file, or your "
91 "call to change the pstate.",
92 get_cname(), pstate_index, static_cast<int>(speed_per_pstate_.size()));
94 double new_peak_speed = speed_per_pstate_[pstate_index];
95 pstate_ = pstate_index;
96 speed_.peak = new_peak_speed;
101 int Cpu::get_pstate() const
106 double Cpu::get_pstate_peak_speed(int pstate_index) const
108 xbt_assert((pstate_index <= static_cast<int>(speed_per_pstate_.size())),
109 "Invalid parameters (pstate index out of bounds)");
111 return speed_per_pstate_[pstate_index];
114 double Cpu::get_speed(double load) const
116 return load * speed_.peak;
119 double Cpu::get_speed_ratio()
121 /* number between 0 and 1 */
125 void Cpu::on_speed_change()
127 s4u::Host::on_speed_change(*host_);
130 int Cpu::get_core_count()
135 void Cpu::set_speed_profile(kernel::profile::Profile* profile)
137 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->get_cname());
139 speed_.event = profile->schedule(&profile::future_evt_set, this);
147 void CpuAction::update_remains_lazy(double now)
149 xbt_assert(get_state_set() == get_model()->get_started_action_set(),
150 "You're updating an action that is not running.");
151 xbt_assert(get_sharing_penalty() > 0, "You're updating an action that seems suspended.");
153 double delta = now - get_last_update();
155 if (get_remains_no_update() > 0) {
156 XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, get_remains_no_update(),
158 update_remains(get_last_value() * delta);
160 XBT_DEBUG("Updating action(%p): remains is now %f", this, get_remains_no_update());
164 set_last_value(get_variable()->get_value());
167 xbt::signal<void(CpuAction const&, Action::State)> CpuAction::on_state_change;
169 void CpuAction::suspend(){
170 Action::State previous = get_state();
171 on_state_change(*this, previous);
175 void CpuAction::resume(){
176 Action::State previous = get_state();
177 on_state_change(*this, previous);
181 void CpuAction::set_state(Action::State state)
183 Action::State previous = get_state();
184 Action::set_state(state);
185 on_state_change(*this, previous);
188 /** @brief returns a list of all CPUs that this action is using */
189 std::list<Cpu*> CpuAction::cpus() const
191 std::list<Cpu*> retlist;
192 int llen = get_variable()->get_number_of_constraint();
194 for (int i = 0; i < llen; i++) {
195 /* Beware of composite actions: ptasks put links and cpus together */
196 // extra pb: we cannot dynamic_cast from void*...
197 Resource* resource = get_variable()->get_constraint(i)->get_id();
198 auto* cpu = dynamic_cast<Cpu*>(resource);
200 retlist.push_back(cpu);
205 } // namespace resource
206 } // namespace kernel
207 } // namespace simgrid