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 itNext = it;
68 ActionList::iterator itend(running_actions->end());
69 for (; it != itend; it = itNext) {
71 action = static_cast<CpuAction*>(&*it);
72 if (TRACE_is_enabled()) {
73 Cpu *cpu = static_cast<Cpu*> (lmm_constraint_id(lmm_get_cnst_from_var(getMaxminSystem(), action->getVariable(), 0)) );
75 TRACE_surf_host_set_utilization(cpu->cname(), action->getCategory(), lmm_variable_getvalue(action->getVariable()),
77 TRACE_last_timestamp_to_dump = now - delta;
80 action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
82 if (action->getMaxDuration() != NO_MAX_DURATION)
83 action->updateMaxDuration(delta);
85 if (((action->getRemainsNoUpdate() <= 0) && (lmm_get_variable_weight(action->getVariable()) > 0)) ||
86 ((action->getMaxDuration() != NO_MAX_DURATION) && (action->getMaxDuration() <= 0))) {
88 action->setState(Action::State::done);
96 Cpu::Cpu(Model *model, simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
97 : Cpu(model, host, nullptr/*constraint*/, speedPerPstate, core)
101 Cpu::Cpu(Model* model, simgrid::s4u::Host* host, lmm_constraint_t constraint, std::vector<double>* speedPerPstate,
103 : Resource(model, host->getCname(), constraint), coresAmount_(core), host_(host)
105 xbt_assert(core > 0, "Host %s must have at least one core, not 0.", host->getCname());
107 speed_.peak = speedPerPstate->front();
109 host->pimpl_cpu = this;
110 xbt_assert(speed_.scale > 0, "Speed of host %s must be >0", host->getCname());
112 // Copy the power peak array:
113 for (double value : *speedPerPstate) {
114 speedPerPstate_.push_back(value);
118 Cpu::~Cpu() = default;
120 int Cpu::getNbPStates()
122 return speedPerPstate_.size();
125 void Cpu::setPState(int pstate_index)
127 xbt_assert(pstate_index <= static_cast<int>(speedPerPstate_.size()),
128 "Invalid parameters for CPU %s (pstate %d > length of pstates %d)", cname(), pstate_index,
129 static_cast<int>(speedPerPstate_.size()));
131 double new_peak_speed = speedPerPstate_[pstate_index];
132 pstate_ = pstate_index;
133 speed_.peak = new_peak_speed;
143 double Cpu::getPstateSpeed(int pstate_index)
145 xbt_assert((pstate_index <= static_cast<int>(speedPerPstate_.size())), "Invalid parameters (pstate index out of bounds)");
147 return speedPerPstate_[pstate_index];
150 double Cpu::getSpeed(double load)
152 return load * speed_.peak;
155 double Cpu::getAvailableSpeed()
157 /* number between 0 and 1 */
161 void Cpu::onSpeedChange() {
162 TRACE_surf_host_set_speed(surf_get_clock(), cname(), coresAmount_ * speed_.scale * speed_.peak);
163 s4u::Host::onSpeedChange(*host_);
171 void Cpu::setStateTrace(tmgr_trace_t trace)
173 xbt_assert(stateEvent_ == nullptr, "Cannot set a second state trace to Host %s", host_->getCname());
175 stateEvent_ = future_evt_set->add_trace(trace, this);
177 void Cpu::setSpeedTrace(tmgr_trace_t trace)
179 xbt_assert(speed_.event == nullptr, "Cannot set a second speed trace to Host %s", host_->getCname());
181 speed_.event = future_evt_set->add_trace(trace, this);
189 void CpuAction::updateRemainingLazy(double now)
191 xbt_assert(getStateSet() == getModel()->getRunningActionSet(), "You're updating an action that is not running.");
192 xbt_assert(getPriority() > 0, "You're updating an action that seems suspended.");
194 double delta = now - lastUpdate_;
197 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains was %f, last_update was: %f", this, remains_, lastUpdate_);
198 double_update(&(remains_), lastValue_ * delta, sg_maxmin_precision*sg_surf_precision);
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->cname(), getCategory(), lastValue_, lastUpdate_, now - lastUpdate_);
204 XBT_CDEBUG(surf_kernel, "Updating action(%p): remains is now %f", this, remains_);
208 lastValue_ = lmm_variable_getvalue(getVariable());
211 simgrid::xbt::signal<void(simgrid::surf::CpuAction*, Action::State)> CpuAction::onStateChange;
213 void CpuAction::setState(Action::State state){
214 Action::State previous = getState();
215 Action::setState(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 lmm_system_t sys = getModel()->getMaxminSystem();
222 int llen = lmm_get_number_of_cnst_from_var(sys, getVariable());
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 Resource* resource = static_cast<Resource*>(lmm_constraint_id(lmm_get_cnst_from_var(sys, getVariable(), i)));
228 Cpu* cpu = dynamic_cast<Cpu*>(resource);
230 retlist.push_back(cpu);