1 /* Copyright (c) 2013-2017. 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. */
7 #include "cpu_interface.hpp"
8 #include "src/instr/instr_private.hpp" // 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 (not actionHeapIsEmpty() && double_equals(actionHeapTopDate(), now, sg_surf_precision)) {
28 CpuAction* action = static_cast<CpuAction*>(actionHeapPop());
29 XBT_CDEBUG(surf_kernel, "Something happened to action %p", action);
30 if (TRACE_is_enabled()) {
31 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)));
32 TRACE_surf_host_set_utilization(cpu->getCname(), action->getCategory(),
33 lmm_variable_getvalue(action->getVariable()), action->getLastUpdate(),
34 now - action->getLastUpdate());
37 action->finish(Action::State::done);
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);
43 if (TRACE_is_enabled()) {
44 //defining the last timestamp that we can safely dump to trace file
45 //without losing the event ascending order (considering all CPU's)
47 ActionList *actionSet = getRunningActionSet();
48 ActionList::iterator it(actionSet->begin());
49 ActionList::iterator itend(actionSet->end());
50 for (; it != itend; ++it) {
51 CpuAction *action = static_cast<CpuAction*>(&*it);
52 if (smaller < 0 || action->getLastUpdate() < smaller)
53 smaller = action->getLastUpdate();
56 TRACE_last_timestamp_to_dump = smaller;
61 void CpuModel::updateActionsStateFull(double now, double delta)
63 CpuAction *action = nullptr;
64 ActionList *running_actions = getRunningActionSet();
65 ActionList::iterator it(running_actions->begin());
66 ActionList::iterator itNext = it;
67 ActionList::iterator itend(running_actions->end());
68 for (; it != itend; it = itNext) {
70 action = static_cast<CpuAction*>(&*it);
71 if (TRACE_is_enabled()) {
72 Cpu *cpu = static_cast<Cpu*> (lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)) );
74 TRACE_surf_host_set_utilization(cpu->getCname(), action->getCategory(),
75 lmm_variable_getvalue(action->getVariable()), now - delta, delta);
76 TRACE_last_timestamp_to_dump = now - delta;
79 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
81 if (action->getMaxDuration() != NO_MAX_DURATION)
82 action->updateMaxDuration(delta);
84 if (((action->getRemainsNoUpdate() <= 0) && (lmm_get_variable_weight(action->getVariable()) > 0)) ||
85 ((action->getMaxDuration() != NO_MAX_DURATION) && (action->getMaxDuration() <= 0))) {
86 action->finish(Action::State::done);
94 Cpu::Cpu(Model *model, simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
95 : Cpu(model, host, nullptr/*constraint*/, speedPerPstate, core)
99 Cpu::Cpu(Model* model, simgrid::s4u::Host* host, lmm_constraint_t constraint, std::vector<double>* speedPerPstate,
101 : Resource(model, host->getCname(), constraint), coresAmount_(core), host_(host)
103 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->getCname());
105 speed_.peak = speedPerPstate->front();
107 host->pimpl_cpu = this;
108 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->getCname());
110 // Copy the power peak array:
111 for (double const& value : *speedPerPstate) {
112 speedPerPstate_.push_back(value);
116 Cpu::~Cpu() = default;
118 int Cpu::getNbPStates()
120 return speedPerPstate_.size();
123 void Cpu::setPState(int pstate_index)
125 xbt_assert(pstate_index <= static_cast<int>(speedPerPstate_.size()),
126 "Invalid parameters for CPU %s (pstate %d > length of pstates %d). Please fix your platform file, or your "
127 "call to change the pstate.",
128 getCname(), pstate_index, static_cast<int>(speedPerPstate_.size()));
130 double new_peak_speed = speedPerPstate_[pstate_index];
131 pstate_ = pstate_index;
132 speed_.peak = new_peak_speed;
142 double Cpu::getPstateSpeed(int pstate_index)
144 xbt_assert((pstate_index <= static_cast<int>(speedPerPstate_.size())), "Invalid parameters (pstate index out of bounds)");
146 return speedPerPstate_[pstate_index];
149 double Cpu::getSpeed(double load)
151 return load * speed_.peak;
154 double Cpu::getAvailableSpeed()
156 /* number between 0 and 1 */
160 void Cpu::onSpeedChange() {
161 TRACE_surf_host_set_speed(surf_get_clock(), getCname(), coresAmount_ * speed_.scale * speed_.peak);
162 s4u::Host::onSpeedChange(*host_);
170 void Cpu::setStateTrace(tmgr_trace_t trace)
172 xbt_assert(stateEvent_ == nullptr, "Cannot set a second state trace to Host %s", host_->getCname());
174 stateEvent_ = future_evt_set->add_trace(trace, this);
176 void Cpu::setSpeedTrace(tmgr_trace_t trace)
178 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->getCname());
180 speed_.event = future_evt_set->add_trace(trace, this);
188 void CpuAction::updateRemainingLazy(double now)
190 xbt_assert(getStateSet() == getModel()->getRunningActionSet(), "You're updating an action that is not running.");
191 xbt_assert(getPriority() > 0, "You're updating an action that seems suspended.");
193 double delta = now - getLastUpdate();
195 if (getRemainsNoUpdate() > 0) {
196 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, getRemainsNoUpdate(),
198 updateRemains(getLastValue() * delta);
200 if (TRACE_is_enabled()) {
201 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getModel()->getMaxminSystem(), getVariable(), 0)));
202 TRACE_surf_host_set_utilization(cpu->getCname(), getCategory(), getLastValue(), getLastUpdate(),
203 now - getLastUpdate());
205 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, getRemainsNoUpdate());
209 setLastValue(lmm_variable_getvalue(getVariable()));
212 simgrid::xbt::signal<void(simgrid::surf::CpuAction*, Action::State)> CpuAction::onStateChange;
214 void CpuAction::suspend(){
215 Action::State previous = getState();
216 onStateChange(this, previous);
220 void CpuAction::resume(){
221 Action::State previous = getState();
222 onStateChange(this, previous);
226 void CpuAction::setState(Action::State state){
227 Action::State previous = getState();
228 Action::setState(state);
229 onStateChange(this, previous);
231 /** @brief returns a list of all CPUs that this action is using */
232 std::list<Cpu*> CpuAction::cpus() {
233 std::list<Cpu*> retlist;
234 lmm_system_t sys = getModel()->getMaxminSystem();
235 int llen = lmm_get_number_of_cnst_from_var(sys, getVariable());
237 for (int i = 0; i < llen; i++) {
238 /* Beware of composite actions: ptasks put links and cpus together */
239 // extra pb: we cannot dynamic_cast from void*...
240 Resource* resource = static_cast<Resource*>(lmm_constraint_id(lmm_get_cnst_from_var(sys, getVariable(), i)));
241 Cpu* cpu = dynamic_cast<Cpu*>(resource);
243 retlist.push_back(cpu);