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);
30 if (TRACE_is_enabled()) {
31 Cpu* cpu = static_cast<Cpu*>(action->get_variable()->get_constraint(0)->get_id());
32 TRACE_surf_host_set_utilization(cpu->get_cname(), action->get_category(), action->get_variable()->get_value(),
33 action->get_last_update(), now - action->get_last_update());
36 action->finish(kernel::resource::Action::State::done);
37 XBT_CDEBUG(surf_kernel, "Action %p finished", action);
39 if (TRACE_is_enabled()) {
40 //defining the last timestamp that we can safely dump to trace file
41 //without losing the event ascending order (considering all CPU's)
43 for (kernel::resource::Action const& action : *get_running_action_set()) {
44 if (smaller < 0 || action.get_last_update() < smaller)
45 smaller = action.get_last_update();
48 TRACE_last_timestamp_to_dump = smaller;
53 void CpuModel::update_actions_state_full(double now, double delta)
55 for (auto it = std::begin(*get_running_action_set()); it != std::end(*get_running_action_set());) {
56 CpuAction& action = static_cast<CpuAction&>(*it);
57 ++it; // increment iterator here since the following calls to action.finish() may invalidate it
58 if (TRACE_is_enabled()) {
59 Cpu* cpu = static_cast<Cpu*>(action.get_variable()->get_constraint(0)->get_id());
60 TRACE_surf_host_set_utilization(cpu->get_cname(), action.get_category(), action.get_variable()->get_value(),
62 TRACE_last_timestamp_to_dump = now - delta;
65 action.update_remains(action.get_variable()->get_value() * delta);
67 if (action.get_max_duration() != NO_MAX_DURATION)
68 action.update_max_duration(delta);
70 if (((action.get_remains_no_update() <= 0) && (action.get_variable()->get_weight() > 0)) ||
71 ((action.get_max_duration() != NO_MAX_DURATION) && (action.get_max_duration() <= 0))) {
72 action.finish(kernel::resource::Action::State::done);
80 Cpu::Cpu(kernel::resource::Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
81 : Cpu(model, host, nullptr /*constraint*/, speedPerPstate, core)
85 Cpu::Cpu(kernel::resource::Model* model, simgrid::s4u::Host* host, kernel::lmm::Constraint* constraint,
86 std::vector<double>* speedPerPstate, int core)
87 : Resource(model, host->get_cname(), constraint), coresAmount_(core), host_(host)
89 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->get_cname());
91 speed_.peak = speedPerPstate->front();
93 host->pimpl_cpu = this;
94 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->get_cname());
96 // Copy the power peak array:
97 for (double const& value : *speedPerPstate) {
98 speedPerPstate_.push_back(value);
102 Cpu::~Cpu() = default;
104 int Cpu::getNbPStates()
106 return speedPerPstate_.size();
109 void Cpu::setPState(int pstate_index)
111 xbt_assert(pstate_index <= static_cast<int>(speedPerPstate_.size()),
112 "Invalid parameters for CPU %s (pstate %d > length of pstates %d). Please fix your platform file, or your "
113 "call to change the pstate.",
114 get_cname(), pstate_index, static_cast<int>(speedPerPstate_.size()));
116 double new_peak_speed = speedPerPstate_[pstate_index];
117 pstate_ = pstate_index;
118 speed_.peak = new_peak_speed;
128 double Cpu::getPstateSpeed(int pstate_index)
130 xbt_assert((pstate_index <= static_cast<int>(speedPerPstate_.size())), "Invalid parameters (pstate index out of bounds)");
132 return speedPerPstate_[pstate_index];
135 double Cpu::getSpeed(double load)
137 return load * speed_.peak;
140 double Cpu::get_available_speed()
142 /* number between 0 and 1 */
146 void Cpu::onSpeedChange() {
147 TRACE_surf_host_set_speed(surf_get_clock(), get_cname(), coresAmount_ * speed_.scale * speed_.peak);
148 s4u::Host::onSpeedChange(*host_);
156 void Cpu::setStateTrace(tmgr_trace_t trace)
158 xbt_assert(stateEvent_ == nullptr, "Cannot set a second state trace to Host %s", host_->get_cname());
160 stateEvent_ = future_evt_set->add_trace(trace, this);
162 void Cpu::set_speed_trace(tmgr_trace_t trace)
164 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->get_cname());
166 speed_.event = future_evt_set->add_trace(trace, this);
174 void CpuAction::update_remains_lazy(double now)
176 xbt_assert(get_state_set() == get_model()->get_running_action_set(),
177 "You're updating an action that is not running.");
178 xbt_assert(get_priority() > 0, "You're updating an action that seems suspended.");
180 double delta = now - get_last_update();
182 if (get_remains_no_update() > 0) {
183 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, get_remains_no_update(),
185 update_remains(get_last_value() * delta);
187 if (TRACE_is_enabled()) {
188 Cpu* cpu = static_cast<Cpu*>(get_variable()->get_constraint(0)->get_id());
189 TRACE_surf_host_set_utilization(cpu->get_cname(), get_category(), get_last_value(), get_last_update(),
190 now - get_last_update());
192 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, get_remains_no_update());
196 set_last_value(get_variable()->get_value());
199 simgrid::xbt::signal<void(simgrid::surf::CpuAction*, kernel::resource::Action::State)> CpuAction::onStateChange;
201 void CpuAction::suspend(){
202 Action::State previous = get_state();
203 onStateChange(this, previous);
207 void CpuAction::resume(){
208 Action::State previous = get_state();
209 onStateChange(this, previous);
213 void CpuAction::set_state(Action::State state)
215 Action::State previous = get_state();
216 Action::set_state(state);
217 onStateChange(this, previous);
219 /** @brief returns a list of all CPUs that this action is using */
220 std::list<Cpu*> CpuAction::cpus() {
221 std::list<Cpu*> retlist;
222 int llen = get_variable()->get_number_of_constraint();
224 for (int i = 0; i < llen; i++) {
225 /* Beware of composite actions: ptasks put links and cpus together */
226 // extra pb: we cannot dynamic_cast from void*...
227 kernel::resource::Resource* resource =
228 static_cast<kernel::resource::Resource*>(get_variable()->get_constraint(i)->get_id());
229 Cpu* cpu = dynamic_cast<Cpu*>(resource);
231 retlist.push_back(cpu);