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
10 XBT_LOG_EXTERNAL_CATEGORY(surf_kernel);
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu, surf, "Logging specific to the SURF cpu module");
13 simgrid::surf::CpuModel *surf_cpu_model_pm;
14 simgrid::surf::CpuModel *surf_cpu_model_vm;
23 void CpuModel::update_actions_state_lazy(double now, double /*delta*/)
25 while (not actionHeapIsEmpty() && double_equals(actionHeapTopDate(), now, sg_surf_precision)) {
27 CpuAction* action = static_cast<CpuAction*>(actionHeapPop());
28 XBT_CDEBUG(surf_kernel, "Something happened to action %p", action);
29 if (TRACE_is_enabled()) {
30 Cpu* cpu = static_cast<Cpu*>(action->get_variable()->get_constraint(0)->get_id());
31 TRACE_surf_host_set_utilization(cpu->getCname(), action->get_category(), action->get_variable()->get_value(),
32 action->get_last_update(), now - action->get_last_update());
35 action->finish(kernel::resource::Action::State::done);
36 XBT_CDEBUG(surf_kernel, "Action %p finished", action);
38 if (TRACE_is_enabled()) {
39 //defining the last timestamp that we can safely dump to trace file
40 //without losing the event ascending order (considering all CPU's)
42 for (kernel::resource::Action const& action : *get_running_action_set()) {
43 if (smaller < 0 || action.get_last_update() < smaller)
44 smaller = action.get_last_update();
47 TRACE_last_timestamp_to_dump = smaller;
52 void CpuModel::update_actions_state_full(double now, double delta)
54 for (auto it = std::begin(*get_running_action_set()); it != std::end(*get_running_action_set());) {
55 CpuAction& action = static_cast<CpuAction&>(*it);
56 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
57 if (TRACE_is_enabled()) {
58 Cpu* cpu = static_cast<Cpu*>(action.get_variable()->get_constraint(0)->get_id());
59 TRACE_surf_host_set_utilization(cpu->getCname(), action.get_category(), action.get_variable()->get_value(),
61 TRACE_last_timestamp_to_dump = now - delta;
64 action.update_remains(action.get_variable()->get_value() * delta);
66 if (action.get_max_duration() != NO_MAX_DURATION)
67 action.update_max_duration(delta);
69 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_weight() > 0)) ||
70 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
71 action.finish(kernel::resource::Action::State::done);
79 Cpu::Cpu(kernel::resource::Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
80 : Cpu(model, host, nullptr /*constraint*/, speedPerPstate, core)
84 Cpu::Cpu(kernel::resource::Model* model, simgrid::s4u::Host* host, kernel::lmm::Constraint* constraint,
85 std::vector<double>* speedPerPstate, int core)
86 : Resource(model, host->getCname(), constraint), coresAmount_(core), host_(host)
88 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->getCname());
90 speed_.peak = speedPerPstate->front();
92 host->pimpl_cpu = this;
93 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->getCname());
95 // Copy the power peak array:
96 for (double const& value : *speedPerPstate) {
97 speedPerPstate_.push_back(value);
101 Cpu::~Cpu() = default;
103 int Cpu::getNbPStates()
105 return speedPerPstate_.size();
108 void Cpu::setPState(int pstate_index)
110 xbt_assert(pstate_index <= static_cast<int>(speedPerPstate_.size()),
111 "Invalid parameters for CPU %s (pstate %d > length of pstates %d). Please fix your platform file, or your "
112 "call to change the pstate.",
113 getCname(), pstate_index, static_cast<int>(speedPerPstate_.size()));
115 double new_peak_speed = speedPerPstate_[pstate_index];
116 pstate_ = pstate_index;
117 speed_.peak = new_peak_speed;
127 double Cpu::getPstateSpeed(int pstate_index)
129 xbt_assert((pstate_index <= static_cast<int>(speedPerPstate_.size())), "Invalid parameters (pstate index out of bounds)");
131 return speedPerPstate_[pstate_index];
134 double Cpu::getSpeed(double load)
136 return load * speed_.peak;
139 double Cpu::getAvailableSpeed()
141 /* number between 0 and 1 */
145 void Cpu::onSpeedChange() {
146 TRACE_surf_host_set_speed(surf_get_clock(), getCname(), coresAmount_ * speed_.scale * speed_.peak);
147 s4u::Host::onSpeedChange(*host_);
155 void Cpu::setStateTrace(tmgr_trace_t trace)
157 xbt_assert(stateEvent_ == nullptr, "Cannot set a second state trace to Host %s", host_->getCname());
159 stateEvent_ = future_evt_set->add_trace(trace, this);
161 void Cpu::setSpeedTrace(tmgr_trace_t trace)
163 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->getCname());
165 speed_.event = future_evt_set->add_trace(trace, this);
173 void CpuAction::update_remains_lazy(double now)
175 xbt_assert(get_state_set() == get_model()->get_running_action_set(),
176 "You're updating an action that is not running.");
177 xbt_assert(get_priority() > 0, "You're updating an action that seems suspended.");
179 double delta = now - get_last_update();
181 if (get_remains_no_update() > 0) {
182 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, get_remains_no_update(),
184 update_remains(get_last_value() * delta);
186 if (TRACE_is_enabled()) {
187 Cpu* cpu = static_cast<Cpu*>(get_variable()->get_constraint(0)->get_id());
188 TRACE_surf_host_set_utilization(cpu->getCname(), get_category(), get_last_value(), get_last_update(),
189 now - get_last_update());
191 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, get_remains_no_update());
195 set_last_value(get_variable()->get_value());
198 simgrid::xbt::signal<void(simgrid::surf::CpuAction*, kernel::resource::Action::State)> CpuAction::onStateChange;
200 void CpuAction::suspend(){
201 Action::State previous = get_state();
202 onStateChange(this, previous);
206 void CpuAction::resume(){
207 Action::State previous = get_state();
208 onStateChange(this, previous);
212 void CpuAction::set_state(Action::State state)
214 Action::State previous = get_state();
215 Action::set_state(state);
216 onStateChange(this, previous);
218 /** @brief returns a list of all CPUs that this action is using */
219 std::list<Cpu*> CpuAction::cpus() {
220 std::list<Cpu*> retlist;
221 int llen = get_variable()->get_number_of_constraint();
223 for (int i = 0; i < llen; i++) {
224 /* Beware of composite actions: ptasks put links and cpus together */
225 // extra pb: we cannot dynamic_cast from void*...
226 kernel::resource::Resource* resource =
227 static_cast<kernel::resource::Resource*>(get_variable()->get_constraint(i)->get_id());
228 Cpu* cpu = dynamic_cast<Cpu*>(resource);
230 retlist.push_back(cpu);