1 /* Copyright (c) 2013-2019. 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_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_EXTERNAL_CATEGORY(surf_kernel);
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf, "Logging specific to the SURF cpu module");
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)) {
29 auto* action = static_cast<CpuAction*>(get_action_heap().pop());
30 XBT_CDEBUG(surf_kernel, "Something happened to action %p", action);
32 action->finish(kernel::resource::Action::State::FINISHED);
33 XBT_CDEBUG(surf_kernel, "Action %p finished", action);
37 void CpuModel::update_actions_state_full(double /*now*/, double delta)
39 for (auto it = std::begin(*get_started_action_set()); it != std::end(*get_started_action_set());) {
40 auto& action = static_cast<CpuAction&>(*it);
41 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
43 action.update_remains(action.get_variable()->get_value() * delta);
44 action.update_max_duration(delta);
46 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_penalty() > 0)) ||
47 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
48 action.finish(Action::State::FINISHED);
56 Cpu::Cpu(Model* model, s4u::Host* host, const std::vector<double>& speed_per_pstate, int core)
57 : Cpu(model, host, nullptr /*constraint*/, speed_per_pstate, core)
61 Cpu::Cpu(Model* model, s4u::Host* host, lmm::Constraint* constraint, const std::vector<double>& speed_per_pstate,
63 : Resource(model, host->get_cname(), constraint)
66 , speed_per_pstate_(speed_per_pstate)
68 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->get_cname());
70 speed_.peak = speed_per_pstate_.front();
72 host->pimpl_cpu = this;
73 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->get_cname());
76 int Cpu::get_pstate_count() const
78 return speed_per_pstate_.size();
81 void Cpu::set_pstate(int pstate_index)
83 xbt_assert(pstate_index <= static_cast<int>(speed_per_pstate_.size()),
84 "Invalid parameters for CPU %s (pstate %d > length of pstates %d). Please fix your platform file, or your "
85 "call to change the pstate.",
86 get_cname(), pstate_index, static_cast<int>(speed_per_pstate_.size()));
88 double new_peak_speed = speed_per_pstate_[pstate_index];
89 pstate_ = pstate_index;
90 speed_.peak = new_peak_speed;
95 int Cpu::get_pstate() const
100 double Cpu::get_pstate_peak_speed(int pstate_index) const
102 xbt_assert((pstate_index <= static_cast<int>(speed_per_pstate_.size())),
103 "Invalid parameters (pstate index out of bounds)");
105 return speed_per_pstate_[pstate_index];
108 double Cpu::get_speed(double load) const
110 return load * speed_.peak;
113 double Cpu::get_speed_ratio()
115 /* number between 0 and 1 */
119 void Cpu::on_speed_change()
121 s4u::Host::on_speed_change(*host_);
124 int Cpu::get_core_count()
129 void Cpu::set_speed_profile(kernel::profile::Profile* profile)
131 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->get_cname());
133 speed_.event = profile->schedule(&profile::future_evt_set, this);
141 void CpuAction::update_remains_lazy(double now)
143 xbt_assert(get_state_set() == get_model()->get_started_action_set(),
144 "You're updating an action that is not running.");
145 xbt_assert(get_sharing_penalty() > 0, "You're updating an action that seems suspended.");
147 double delta = now - get_last_update();
149 if (get_remains_no_update() > 0) {
150 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, get_remains_no_update(),
152 update_remains(get_last_value() * delta);
154 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, get_remains_no_update());
158 set_last_value(get_variable()->get_value());
161 xbt::signal<void(CpuAction const&, Action::State)> CpuAction::on_state_change;
163 void CpuAction::suspend(){
164 Action::State previous = get_state();
165 on_state_change(*this, previous);
169 void CpuAction::resume(){
170 Action::State previous = get_state();
171 on_state_change(*this, previous);
175 void CpuAction::set_state(Action::State state)
177 Action::State previous = get_state();
178 Action::set_state(state);
179 on_state_change(*this, previous);
182 /** @brief returns a list of all CPUs that this action is using */
183 std::list<Cpu*> CpuAction::cpus() const
185 std::list<Cpu*> retlist;
186 int llen = get_variable()->get_number_of_constraint();
188 for (int i = 0; i < llen; i++) {
189 /* Beware of composite actions: ptasks put links and cpus together */
190 // extra pb: we cannot dynamic_cast from void*...
191 Resource* resource = get_variable()->get_constraint(i)->get_id();
192 Cpu* cpu = dynamic_cast<Cpu*>(resource);
194 retlist.push_back(cpu);
199 } // namespace resource
200 } // namespace kernel
201 } // namespace simgrid