1 /* Copyright (c) 2013-2018. 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/instr/instr_private.hpp" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
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::surf::CpuModel *surf_cpu_model_pm;
15 simgrid::surf::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)) {
28 CpuAction* action = static_cast<CpuAction*>(get_action_heap().pop());
29 XBT_CDEBUG(surf_kernel, "Something happened to action %p", action);
31 action->finish(kernel::resource::Action::State::done);
32 XBT_CDEBUG(surf_kernel, "Action %p finished", action);
34 if (TRACE_is_enabled()) {
35 //defining the last timestamp that we can safely dump to trace file
36 //without losing the event ascending order (considering all CPU's)
38 for (kernel::resource::Action const& action : *get_running_action_set()) {
39 if (smaller < 0 || action.get_last_update() < smaller)
40 smaller = action.get_last_update();
43 TRACE_last_timestamp_to_dump = smaller;
48 void CpuModel::update_actions_state_full(double now, double delta)
50 for (auto it = std::begin(*get_running_action_set()); it != std::end(*get_running_action_set());) {
51 CpuAction& action = static_cast<CpuAction&>(*it);
52 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
54 action.update_remains(action.get_variable()->get_value() * delta);
56 if (action.get_max_duration() != NO_MAX_DURATION)
57 action.update_max_duration(delta);
59 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_weight() > 0)) ||
60 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
61 action.finish(kernel::resource::Action::State::done);
69 Cpu::Cpu(kernel::resource::Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
70 : Cpu(model, host, nullptr /*constraint*/, speedPerPstate, core)
74 Cpu::Cpu(kernel::resource::Model* model, simgrid::s4u::Host* host, kernel::lmm::Constraint* constraint,
75 std::vector<double>* speedPerPstate, int core)
76 : Resource(model, host->get_cname(), constraint), coresAmount_(core), host_(host)
78 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->get_cname());
80 speed_.peak = speedPerPstate->front();
82 host->pimpl_cpu = this;
83 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->get_cname());
85 // Copy the power peak array:
86 for (double const& value : *speedPerPstate) {
87 speedPerPstate_.push_back(value);
91 Cpu::~Cpu() = default;
93 int Cpu::getNbPStates()
95 return speedPerPstate_.size();
98 void Cpu::setPState(int pstate_index)
100 xbt_assert(pstate_index <= static_cast<int>(speedPerPstate_.size()),
101 "Invalid parameters for CPU %s (pstate %d > length of pstates %d). Please fix your platform file, or your "
102 "call to change the pstate.",
103 get_cname(), pstate_index, static_cast<int>(speedPerPstate_.size()));
105 double new_peak_speed = speedPerPstate_[pstate_index];
106 pstate_ = pstate_index;
107 speed_.peak = new_peak_speed;
117 double Cpu::getPstateSpeed(int pstate_index)
119 xbt_assert((pstate_index <= static_cast<int>(speedPerPstate_.size())), "Invalid parameters (pstate index out of bounds)");
121 return speedPerPstate_[pstate_index];
124 double Cpu::getSpeed(double load)
126 return load * speed_.peak;
129 double Cpu::get_available_speed()
131 /* number between 0 and 1 */
135 void Cpu::onSpeedChange() {
136 s4u::Host::on_speed_change(*host_);
144 void Cpu::setStateTrace(tmgr_trace_t trace)
146 xbt_assert(stateEvent_ == nullptr, "Cannot set a second state trace to Host %s", host_->get_cname());
148 stateEvent_ = future_evt_set->add_trace(trace, this);
150 void Cpu::set_speed_trace(tmgr_trace_t trace)
152 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->get_cname());
154 speed_.event = future_evt_set->add_trace(trace, this);
162 void CpuAction::update_remains_lazy(double now)
164 xbt_assert(get_state_set() == get_model()->get_running_action_set(),
165 "You're updating an action that is not running.");
166 xbt_assert(get_priority() > 0, "You're updating an action that seems suspended.");
168 double delta = now - get_last_update();
170 if (get_remains_no_update() > 0) {
171 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, get_remains_no_update(),
173 update_remains(get_last_value() * delta);
175 if (TRACE_is_enabled()) {
176 Cpu* cpu = static_cast<Cpu*>(get_variable()->get_constraint(0)->get_id());
177 TRACE_surf_resource_set_utilization("HOST", "power_used", cpu->get_cname(), get_category(), get_last_value(),
178 get_last_update(), now - get_last_update());
180 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, get_remains_no_update());
184 set_last_value(get_variable()->get_value());
187 simgrid::xbt::signal<void(simgrid::surf::CpuAction*, kernel::resource::Action::State)> CpuAction::onStateChange;
189 void CpuAction::suspend(){
190 Action::State previous = get_state();
191 onStateChange(this, previous);
195 void CpuAction::resume(){
196 Action::State previous = get_state();
197 onStateChange(this, previous);
201 void CpuAction::set_state(Action::State state)
203 Action::State previous = get_state();
204 Action::set_state(state);
205 onStateChange(this, previous);
207 /** @brief returns a list of all CPUs that this action is using */
208 std::list<Cpu*> CpuAction::cpus() {
209 std::list<Cpu*> retlist;
210 int llen = get_variable()->get_number_of_constraint();
212 for (int i = 0; i < llen; i++) {
213 /* Beware of composite actions: ptasks put links and cpus together */
214 // extra pb: we cannot dynamic_cast from void*...
215 kernel::resource::Resource* resource =
216 static_cast<kernel::resource::Resource*>(get_variable()->get_constraint(i)->get_id());
217 Cpu* cpu = dynamic_cast<Cpu*>(resource);
219 retlist.push_back(cpu);