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 ActionList::iterator it(actionSet->begin());
50 ActionList::iterator itend(actionSet->end());
51 for (; it != itend; ++it) {
52 CpuAction *action = static_cast<CpuAction*>(&*it);
53 if (smaller < 0 || action->getLastUpdate() < smaller)
54 smaller = action->getLastUpdate();
57 TRACE_last_timestamp_to_dump = smaller;
62 void CpuModel::updateActionsStateFull(double now, double delta)
64 CpuAction *action = nullptr;
65 ActionList *running_actions = getRunningActionSet();
66 ActionList::iterator it(running_actions->begin());
67 ActionList::iterator itend(running_actions->end()) for (; it != itend; ++it)
69 action = static_cast<CpuAction*>(&*it);
70 if (TRACE_is_enabled()) {
71 Cpu *cpu = static_cast<Cpu*> (lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)) );
73 TRACE_surf_host_set_utilization(cpu->cname(), action->getCategory(), lmm_variable_getvalue(action->getVariable()),
75 TRACE_last_timestamp_to_dump = now - delta;
78 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
81 if (action->getMaxDuration() != NO_MAX_DURATION)
82 action->updateMaxDuration(delta);
85 if ((action->getRemainsNoUpdate() <= 0) &&
86 (lmm_get_variable_weight(action->getVariable()) > 0)) {
88 action->setState(Action::State::done);
89 } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
90 (action->getMaxDuration() <= 0)) {
92 action->setState(Action::State::done);
100 Cpu::Cpu(Model *model, simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
101 : Cpu(model, host, nullptr/*constraint*/, speedPerPstate, core)
105 Cpu::Cpu(Model* model, simgrid::s4u::Host* host, lmm_constraint_t constraint, std::vector<double>* speedPerPstate,
107 : Resource(model, host->cname(), constraint), coresAmount_(core), host_(host)
109 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->cname());
111 speed_.peak = speedPerPstate->front();
113 host->pimpl_cpu = this;
114 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->cname());
116 // Copy the power peak array:
117 for (double value : *speedPerPstate) {
118 speedPerPstate_.push_back(value);
121 xbt_assert(model == surf_cpu_model_pm || core==1, "Currently, VM cannot be multicore");
124 Cpu::~Cpu() = default;
126 /** @brief The amount of flop per second that this CPU can compute at its current DVFS level */
127 double Cpu::getPstateSpeedCurrent()
132 int Cpu::getNbPStates()
134 return speedPerPstate_.size();
137 void Cpu::setPState(int pstate_index)
139 xbt_assert(pstate_index <= static_cast<int>(speedPerPstate_.size()),
140 "Invalid parameters for CPU %s (pstate %d > length of pstates %d)", cname(), pstate_index,
141 static_cast<int>(speedPerPstate_.size()));
143 double new_peak_speed = speedPerPstate_[pstate_index];
144 pstate_ = pstate_index;
145 speed_.peak = new_peak_speed;
155 double Cpu::getPstateSpeed(int pstate_index)
157 xbt_assert((pstate_index <= static_cast<int>(speedPerPstate_.size())), "Invalid parameters (pstate index out of bounds)");
159 return speedPerPstate_[pstate_index];
162 double Cpu::getSpeed(double load)
164 return load * speed_.peak;
167 double Cpu::getAvailableSpeed()
169 /* number between 0 and 1 */
173 void Cpu::onSpeedChange() {
174 TRACE_surf_host_set_speed(surf_get_clock(), cname(), coresAmount_ * speed_.scale * speed_.peak);
175 s4u::Host::onSpeedChange(*host_);
183 void Cpu::setStateTrace(tmgr_trace_t trace)
185 xbt_assert(stateEvent_ == nullptr, "Cannot set a second state trace to Host %s", host_->cname());
187 stateEvent_ = future_evt_set->add_trace(trace, 0.0, this);
189 void Cpu::setSpeedTrace(tmgr_trace_t trace)
191 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->cname());
193 speed_.event = future_evt_set->add_trace(trace, 0.0, this);
201 void CpuAction::updateRemainingLazy(double now)
203 xbt_assert(getStateSet() == getModel()->getRunningActionSet(), "You're updating an action that is not running.");
204 xbt_assert(getPriority() > 0, "You're updating an action that seems suspended.");
206 double delta = now - lastUpdate_;
209 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, remains_, lastUpdate_);
210 double_update(&(remains_), lastValue_ * delta, sg_maxmin_precision*sg_surf_precision);
212 if (TRACE_is_enabled()) {
213 Cpu *cpu = static_cast<Cpu*>(lmm_constraint_id(lmm_get_cnst_from_var(getModel()->getMaxminSystem(), getVariable(), 0)));
214 TRACE_surf_host_set_utilization(cpu->cname(), getCategory(), lastValue_, lastUpdate_, now - lastUpdate_);
216 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, remains_);
220 lastValue_ = lmm_variable_getvalue(getVariable());
223 simgrid::xbt::signal<void(simgrid::surf::CpuAction*, Action::State)> CpuAction::onStateChange;
225 void CpuAction::setState(Action::State state){
226 Action::State previous = getState();
227 Action::setState(state);
228 onStateChange(this, previous);
230 /** @brief returns a list of all CPUs that this action is using */
231 std::list<Cpu*> CpuAction::cpus() {
232 std::list<Cpu*> retlist;
233 lmm_system_t sys = getModel()->getMaxminSystem();
234 int llen = lmm_get_number_of_cnst_from_var(sys, getVariable());
236 for (int i = 0; i < llen; i++) {
237 /* Beware of composite actions: ptasks put links and cpus together */
238 // extra pb: we cannot dynamic_cast from void*...
239 Resource* resource = static_cast<Resource*>(lmm_constraint_id(lmm_get_cnst_from_var(sys, getVariable(), i)));
240 Cpu* cpu = dynamic_cast<Cpu*>(resource);
242 retlist.push_back(cpu);