1 /* Copyright (c) 2013-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "cpu_interface.hpp"
9 #include "src/instr/instr_private.h" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
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::updateActionsStateLazy(double now, double /*delta*/)
26 while ((xbt_heap_size(getActionHeap()) > 0)
27 && (double_equals(xbt_heap_maxkey(getActionHeap()), now, sg_surf_precision))) {
29 CpuAction *action = static_cast<CpuAction*>(xbt_heap_pop(getActionHeap()));
30 XBT_CDEBUG(surf_kernel, "Something happened to action %p", action);
31 if (TRACE_is_enabled()) {
32 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)));
33 TRACE_surf_host_set_utilization(cpu->cname(), action->getCategory(), lmm_variable_getvalue(action->getVariable()),
34 action->getLastUpdate(), now - action->getLastUpdate());
38 XBT_CDEBUG(surf_kernel, "Action %p finished", action);
40 /* set the remains to 0 due to precision problems when updating the remaining amount */
41 action->setRemains(0);
42 action->setState(Action::State::done);
44 if (TRACE_is_enabled()) {
45 //defining the last timestamp that we can safely dump to trace file
46 //without losing the event ascending order (considering all CPU's)
48 ActionList *actionSet = getRunningActionSet();
49 for(ActionList::iterator it(actionSet->begin()), itend(actionSet->end())
50 ; it != itend ; ++it) {
51 CpuAction *action = static_cast<CpuAction*>(&*it);
53 smaller = action->getLastUpdate();
56 if (action->getLastUpdate() < smaller) {
57 smaller = action->getLastUpdate();
61 TRACE_last_timestamp_to_dump = smaller;
66 void CpuModel::updateActionsStateFull(double now, double delta)
68 CpuAction *action = nullptr;
69 ActionList *running_actions = getRunningActionSet();
71 for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
72 ; it != itend ; it=itNext) {
74 action = static_cast<CpuAction*>(&*it);
75 if (TRACE_is_enabled()) {
76 Cpu *cpu = static_cast<Cpu*> (lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)) );
78 TRACE_surf_host_set_utilization(cpu->cname(), action->getCategory(), lmm_variable_getvalue(action->getVariable()),
80 TRACE_last_timestamp_to_dump = now - delta;
83 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
86 if (action->getMaxDuration() != NO_MAX_DURATION)
87 action->updateMaxDuration(delta);
90 if ((action->getRemainsNoUpdate() <= 0) &&
91 (lmm_get_variable_weight(action->getVariable()) > 0)) {
93 action->setState(Action::State::done);
94 } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
95 (action->getMaxDuration() <= 0)) {
97 action->setState(Action::State::done);
105 Cpu::Cpu(Model *model, simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
106 : Cpu(model, host, nullptr/*constraint*/, speedPerPstate, core)
110 Cpu::Cpu(Model* model, simgrid::s4u::Host* host, lmm_constraint_t constraint, std::vector<double>* speedPerPstate,
112 : Resource(model, host->cname(), constraint), coresAmount_(core), host_(host)
114 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->cname());
116 speed_.peak = speedPerPstate->front();
118 host->pimpl_cpu = this;
119 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->cname());
121 // Copy the power peak array:
122 for (double value : *speedPerPstate) {
123 speedPerPstate_.push_back(value);
126 xbt_assert(model == surf_cpu_model_pm || core==1, "Currently, VM cannot be multicore");
129 Cpu::~Cpu() = default;
131 /** @brief The amount of flop per second that this CPU can compute at its current DVFS level */
132 double Cpu::getPstateSpeedCurrent()
137 int Cpu::getNbPStates()
139 return speedPerPstate_.size();
142 void Cpu::setPState(int pstate_index)
144 xbt_assert(pstate_index <= static_cast<int>(speedPerPstate_.size()),
145 "Invalid parameters for CPU %s (pstate %d > length of pstates %d)", cname(), pstate_index,
146 static_cast<int>(speedPerPstate_.size()));
148 double new_peak_speed = speedPerPstate_[pstate_index];
149 pstate_ = pstate_index;
150 speed_.peak = new_peak_speed;
160 double Cpu::getPstateSpeed(int pstate_index)
162 xbt_assert((pstate_index <= static_cast<int>(speedPerPstate_.size())), "Invalid parameters (pstate index out of bounds)");
164 return speedPerPstate_[pstate_index];
167 double Cpu::getSpeed(double load)
169 return load * speed_.peak;
172 double Cpu::getAvailableSpeed()
174 /* number between 0 and 1 */
178 void Cpu::onSpeedChange() {
179 TRACE_surf_host_set_speed(surf_get_clock(), cname(), coresAmount_ * speed_.scale * speed_.peak);
180 s4u::Host::onSpeedChange(*host_);
188 void Cpu::setStateTrace(tmgr_trace_t trace)
190 xbt_assert(stateEvent_ == nullptr, "Cannot set a second state trace to Host %s", host_->cname());
192 stateEvent_ = future_evt_set->add_trace(trace, 0.0, this);
194 void Cpu::setSpeedTrace(tmgr_trace_t trace)
196 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->cname());
198 speed_.event = future_evt_set->add_trace(trace, 0.0, this);
206 void CpuAction::updateRemainingLazy(double now)
208 xbt_assert(getStateSet() == getModel()->getRunningActionSet(), "You're updating an action that is not running.");
209 xbt_assert(getPriority() > 0, "You're updating an action that seems suspended.");
211 double delta = now - lastUpdate_;
214 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, remains_, lastUpdate_);
215 double_update(&(remains_), lastValue_ * delta, sg_maxmin_precision*sg_surf_precision);
217 if (TRACE_is_enabled()) {
218 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getModel()->getMaxminSystem(), getVariable(), 0)));
219 TRACE_surf_host_set_utilization(cpu->cname(), getCategory(), lastValue_, lastUpdate_, now - lastUpdate_);
221 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, remains_);
225 lastValue_ = lmm_variable_getvalue(getVariable());
228 simgrid::xbt::signal<void(simgrid::surf::CpuAction*, Action::State)> CpuAction::onStateChange;
230 void CpuAction::setState(Action::State state){
231 Action::State previous = getState();
232 Action::setState(state);
233 onStateChange(this, previous);
235 /** @brief returns a list of all CPUs that this action is using */
236 std::list<Cpu*> CpuAction::cpus() {
237 std::list<Cpu*> retlist;
238 lmm_system_t sys = getModel()->getMaxminSystem();
239 int llen = lmm_get_number_of_cnst_from_var(sys, getVariable());
241 for (int i = 0; i < llen; i++) {
242 /* Beware of composite actions: ptasks put links and cpus together */
243 // extra pb: we cannot dynamic_cast from void*...
244 Resource* resource = static_cast<Resource*>(lmm_constraint_id(lmm_get_cnst_from_var(sys, getVariable(), i)));
245 Cpu* cpu = dynamic_cast<Cpu*>(resource);
247 retlist.push_back(cpu);