1 /* Copyright (c) 2009-2011, 2013-2016. 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_cas01.hpp"
9 #include "maxmin_private.hpp"
10 #include "simgrid/sg_config.h"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu, "Logging specific to the SURF CPU IMPROVED module");
17 void surf_cpu_model_init_Cas01()
19 xbt_assert(not surf_cpu_model_pm);
20 xbt_assert(not surf_cpu_model_vm);
22 char *optim = xbt_cfg_get_string("cpu/optim");
23 if (not strcmp(optim, "TI")) {
24 surf_cpu_model_init_ti();
28 surf_cpu_model_pm = new simgrid::surf::CpuCas01Model();
29 all_existing_models->push_back(surf_cpu_model_pm);
31 surf_cpu_model_vm = new simgrid::surf::CpuCas01Model();
32 all_existing_models->push_back(surf_cpu_model_vm);
38 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
40 char *optim = xbt_cfg_get_string("cpu/optim");
41 bool select = xbt_cfg_get_boolean("cpu/maxmin-selective-update");
43 if (not strcmp(optim, "Full")) {
44 updateMechanism_ = UM_FULL;
45 selectiveUpdate_ = select;
46 } else if (not strcmp(optim, "Lazy")) {
47 updateMechanism_ = UM_LAZY;
48 selectiveUpdate_ = true;
49 xbt_assert(select || (xbt_cfg_is_default_value("cpu/maxmin-selective-update")),
50 "Disabling selective update while using the lazy update mechanism is dumb!");
52 xbt_die("Unsupported optimization (%s) for this model", optim);
55 p_cpuRunningActionSetThatDoesNotNeedBeingChecked = new ActionList();
56 maxminSystem_ = lmm_system_new(selectiveUpdate_);
58 if (getUpdateMechanism() == UM_LAZY) {
59 actionHeap_ = xbt_heap_new(8, nullptr);
60 xbt_heap_set_update_callback(actionHeap_, surf_action_lmm_update_index_heap);
61 modifiedSet_ = new ActionLmmList();
62 maxminSystem_->keep_track = modifiedSet_;
66 CpuCas01Model::~CpuCas01Model()
68 lmm_system_free(maxminSystem_);
69 maxminSystem_ = nullptr;
70 xbt_heap_free(actionHeap_);
73 surf_cpu_model_pm = nullptr;
75 delete p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
78 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
80 return new CpuCas01(this, host, speedPerPstate, core);
86 CpuCas01::CpuCas01(CpuCas01Model *model, simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
87 : Cpu(model, host, lmm_constraint_new(model->getMaxminSystem(), this, core * speedPerPstate->front()),
94 if (model() == surf_cpu_model_pm)
95 speedPerPstate_.clear();
98 std::vector<double> * CpuCas01::getSpeedPeakList(){
99 return &speedPerPstate_;
102 bool CpuCas01::isUsed()
104 return lmm_constraint_used(model()->getMaxminSystem(), constraint());
107 /** @brief take into account changes of speed (either load or max) */
108 void CpuCas01::onSpeedChange() {
109 lmm_variable_t var = nullptr;
110 lmm_element_t elem = nullptr;
112 lmm_update_constraint_bound(model()->getMaxminSystem(), constraint(), coresAmount_ * speed_.scale * speed_.peak);
113 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), constraint(), &elem))) {
114 CpuCas01Action* action = static_cast<CpuCas01Action*>(lmm_variable_id(var));
116 lmm_update_variable_bound(model()->getMaxminSystem(), action->getVariable(),
117 action->requestedCore() * speed_.scale * speed_.peak);
120 Cpu::onSpeedChange();
123 void CpuCas01::apply_event(tmgr_trace_event_t event, double value)
125 if (event == speed_.event) {
126 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
127 xbt_assert(coresAmount_ == 1, "FIXME: add speed scaling code also for constraint_core[i]");
129 speed_.scale = value;
132 tmgr_trace_event_unref(&speed_.event);
133 } else if (event == stateEvent_) {
134 /* TODO (Hypervisor): do the same thing for constraint_core[i] */
135 xbt_assert(coresAmount_ == 1, "FIXME: add state change code also for constraint_core[i]");
139 host_that_restart.push_back(getHost());
142 lmm_constraint_t cnst = constraint();
143 lmm_variable_t var = nullptr;
144 lmm_element_t elem = nullptr;
145 double date = surf_get_clock();
149 while ((var = lmm_get_var_from_cnst(model()->getMaxminSystem(), cnst, &elem))) {
150 Action *action = static_cast<Action*>(lmm_variable_id(var));
152 if (action->getState() == Action::State::running ||
153 action->getState() == Action::State::ready ||
154 action->getState() == Action::State::not_in_the_system) {
155 action->setFinishTime(date);
156 action->setState(Action::State::failed);
160 tmgr_trace_event_unref(&stateEvent_);
163 xbt_die("Unknown event!\n");
167 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
168 CpuAction *CpuCas01::execution_start(double size)
170 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint());
172 CpuAction* CpuCas01::execution_start(double size, int requestedCores)
174 return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint(), requestedCores);
177 CpuAction *CpuCas01::sleep(double duration)
180 duration = MAX(duration, sg_surf_precision);
182 XBT_IN("(%s,%g)", cname(), duration);
183 CpuCas01Action* action = new CpuCas01Action(model(), 1.0, isOff(), speed_.scale * speed_.peak, constraint());
185 // FIXME: sleep variables should not consume 1.0 in lmm_expand
186 action->maxDuration_ = duration;
187 action->suspended_ = 2;
188 if (duration < 0) { // NO_MAX_DURATION
189 /* Move to the *end* of the corresponding action set. This convention is used to speed up update_resource_state */
190 action->getStateSet()->erase(action->getStateSet()->iterator_to(*action));
191 action->stateSet_ = static_cast<CpuCas01Model*>(model())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
192 action->getStateSet()->push_back(*action);
195 lmm_update_variable_weight(model()->getMaxminSystem(), action->getVariable(), 0.0);
196 if (model()->getUpdateMechanism() == UM_LAZY) { // remove action from the heap
197 action->heapRemove(model()->getActionHeap());
198 // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
199 // max_duration correctly at the next call to share_resources
200 model()->getModifiedSet()->push_front(*action);
210 CpuCas01Action::CpuCas01Action(Model* model, double cost, bool failed, double speed, lmm_constraint_t constraint,
212 : CpuAction(model, cost, failed,
213 lmm_variable_new(model->getMaxminSystem(), this, 1.0 / requestedCore, requestedCore * speed, 1))
214 , requestedCore_(requestedCore)
216 if (model->getUpdateMechanism() == UM_LAZY) {
218 lastUpdate_ = surf_get_clock();
221 lmm_expand(model->getMaxminSystem(), constraint, getVariable(), 1.0);
224 CpuCas01Action::CpuCas01Action(Model* model, double cost, bool failed, double speed, lmm_constraint_t constraint)
225 : CpuCas01Action(model, cost, failed, speed, constraint, 1)
229 int CpuCas01Action::requestedCore()
231 return requestedCore_;
234 CpuCas01Action::~CpuCas01Action()=default;