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"
8 #include "src/kernel/resource/profile/Profile.hpp"
9 #include "src/surf/surf_interface.hpp"
10 #include "surf/surf.hpp"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_cpu, ker_resource, "CPU resource, fueling execution activites");
14 simgrid::kernel::resource::CpuModel* surf_cpu_model_pm;
15 simgrid::kernel::resource::CpuModel* surf_cpu_model_vm;
25 void CpuModel::update_actions_state_lazy(double now, double /*delta*/)
27 while (not get_action_heap().empty() && double_equals(get_action_heap().top_date(), now, sg_surf_precision)) {
28 auto* action = static_cast<CpuAction*>(get_action_heap().pop());
29 XBT_DEBUG("Something happened to action %p", action);
31 action->finish(kernel::resource::Action::State::FINISHED);
32 XBT_DEBUG("Action %p finished", action);
36 void CpuModel::update_actions_state_full(double /*now*/, double delta)
38 for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
39 auto& action = static_cast<CpuAction&>(*it);
40 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
42 action.update_remains(action.get_variable()->get_value() * delta);
43 action.update_max_duration(delta);
45 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
46 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
47 action.finish(Action::State::FINISHED);
55 Cpu::Cpu(s4u::Host* host, const std::vector<double>& speed_per_pstate)
56 : Resource_T(host->get_cname()), piface_(host), speed_per_pstate_(speed_per_pstate)
59 speed_.peak = speed_per_pstate_.front();
60 host->pimpl_cpu = this;
63 void Cpu::reset_vcpu(Cpu* that)
65 this->pstate_ = that->pstate_;
66 this->speed_ = that->speed_;
67 this->speed_per_pstate_.clear();
68 this->speed_per_pstate_.assign(that->speed_per_pstate_.begin(), that->speed_per_pstate_.end());
71 void Cpu::set_pstate(int pstate_index)
73 xbt_assert(pstate_index <= static_cast<int>(speed_per_pstate_.size()),
74 "Invalid parameters for CPU %s (pstate %d > length of pstates %d). Please fix your platform file, or your "
75 "call to change the pstate.",
76 get_cname(), pstate_index, static_cast<int>(speed_per_pstate_.size()));
78 double new_peak_speed = speed_per_pstate_[pstate_index];
79 pstate_ = pstate_index;
80 speed_.peak = new_peak_speed;
85 double Cpu::get_pstate_peak_speed(int pstate_index) const
87 xbt_assert((pstate_index <= static_cast<int>(speed_per_pstate_.size())),
88 "Invalid parameters (pstate index out of bounds)");
90 return speed_per_pstate_[pstate_index];
93 void Cpu::on_speed_change()
95 s4u::Host::on_speed_change(*piface_);
98 Cpu* Cpu::set_core_count(int core_count)
100 xbt_assert(not is_sealed(), "Core count cannot be changed once CPU has been sealed");
101 xbt_assert(core_count > 0, "Host %s must have at least one core, not 0.", piface_->get_cname());
102 if (dynamic_cast<CpuTiModel*>(get_model()) != nullptr)
103 xbt_assert(core_count == 1, "Multi-core not handled by this model yet");
105 core_count_ = core_count;
109 int Cpu::get_core_count()
114 void Cpu::set_speed_profile(kernel::profile::Profile* profile)
116 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", piface_->get_cname());
118 speed_.event = profile->schedule(&profile::future_evt_set, this);
123 lmm::System* lmm = get_model()->get_maxmin_system();
124 if (dynamic_cast<CpuTiModel*>(get_model()) == nullptr)
125 this->set_constraint(lmm->constraint_new(this, core_count_ * speed_per_pstate_.front()));
133 void CpuAction::update_remains_lazy(double now)
135 xbt_assert(get_state_set() == get_model()->get_started_action_set(),
136 "You're updating an action that is not running.");
137 xbt_assert(get_sharing_penalty() > 0, "You're updating an action that seems suspended.");
139 double delta = now - get_last_update();
141 if (get_remains_no_update() > 0) {
142 XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, get_remains_no_update(),
144 update_remains(get_last_value() * delta);
146 XBT_DEBUG("Updating action(%p): remains is now %f", this, get_remains_no_update());
150 set_last_value(get_variable()->get_value());
153 xbt::signal<void(CpuAction const&, Action::State)> CpuAction::on_state_change;
155 void CpuAction::suspend(){
156 Action::State previous = get_state();
157 on_state_change(*this, previous);
161 void CpuAction::resume(){
162 Action::State previous = get_state();
163 on_state_change(*this, previous);
167 void CpuAction::set_state(Action::State state)
169 Action::State previous = get_state();
170 Action::set_state(state);
171 on_state_change(*this, previous);
174 /** @brief returns a list of all CPUs that this action is using */
175 std::list<Cpu*> CpuAction::cpus() const
177 std::list<Cpu*> retlist;
178 int llen = get_variable()->get_number_of_constraint();
180 for (int i = 0; i < llen; i++) {
181 /* Beware of composite actions: ptasks put links and cpus together */
182 // extra pb: we cannot dynamic_cast from void*...
183 Resource* resource = get_variable()->get_constraint(i)->get_id();
184 auto* cpu = dynamic_cast<Cpu*>(resource);
186 retlist.push_back(cpu);
191 } // namespace resource
192 } // namespace kernel
193 } // namespace simgrid