src/surf/cpu_cas01.cpp

   1 /* Copyright (c) 2009-2018. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "cpu_cas01.hpp"
   7 #include "cpu_ti.hpp"
   8 #include "simgrid/sg_config.h"
   9 #include "src/kernel/lmm/maxmin.hpp"
  10 #include "xbt/utility.hpp"
  11 #include <algorithm>
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu, "Logging specific to the SURF CPU IMPROVED module");
  14
  15 /*********
  16  * Model *
  17  *********/
  18 void surf_cpu_model_init_Cas01()
  19 {
  20   xbt_assert(not surf_cpu_model_pm);
  21   xbt_assert(not surf_cpu_model_vm);
  22
  23   if (xbt_cfg_get_string("cpu/optim") == "TI") {
  24     surf_cpu_model_init_ti();
  25     return;
  26   }
  27
  28   surf_cpu_model_pm = new simgrid::surf::CpuCas01Model();
  29   all_existing_models->push_back(surf_cpu_model_pm);
  30
  31   surf_cpu_model_vm  = new simgrid::surf::CpuCas01Model();
  32   all_existing_models->push_back(surf_cpu_model_vm);
  33 }
  34
  35 namespace simgrid {
  36 namespace surf {
  37
  38 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
  39 {
  40   std::string optim = xbt_cfg_get_string("cpu/optim");
  41   bool select = xbt_cfg_get_boolean("cpu/maxmin-selective-update");
  42
  43   if (optim == "Full") {
  44     setUpdateMechanism(UM_FULL);
  45   } else if (optim == "Lazy") {
  46     setUpdateMechanism(UM_LAZY);
  47     select = true;
  48     xbt_assert(select || (xbt_cfg_is_default_value("cpu/maxmin-selective-update")),
  49                "Disabling selective update while using the lazy update mechanism is dumb!");
  50   } else {
  51     xbt_die("Unsupported optimization (%s) for this model", optim.c_str());
  52   }
  53
  54   maxmin_system_ = new simgrid::kernel::lmm::System(select);
  55
  56   if (getUpdateMechanism() == UM_LAZY)
  57     maxmin_system_->modified_set_ = new kernel::resource::Action::ModifiedSet();
  58 }
  59
  60 CpuCas01Model::~CpuCas01Model()
  61 {
  62   surf_cpu_model_pm = nullptr;
  63 }
  64
  65 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, std::vector<double> *speedPerPstate, int core)
  66 {
  67   return new CpuCas01(this, host, speedPerPstate, core);
  68 }
  69
  70 /************
  71  * Resource *
  72  ************/
  73 CpuCas01::CpuCas01(CpuCas01Model* model, simgrid::s4u::Host* host, std::vector<double>* speedPerPstate, int core)
  74     : Cpu(model, host, model->getMaxminSystem()->constraint_new(this, core * speedPerPstate->front()), speedPerPstate,
  75           core)
  76 {
  77 }
  78
  79 CpuCas01::~CpuCas01()
  80 {
  81   if (model() == surf_cpu_model_pm)
  82     speedPerPstate_.clear();
  83 }
  84
  85 std::vector<double> * CpuCas01::getSpeedPeakList(){
  86   return &speedPerPstate_;
  87 }
  88
  89 bool CpuCas01::isUsed()
  90 {
  91   return model()->getMaxminSystem()->constraint_used(constraint());
  92 }
  93
  94 /** @brief take into account changes of speed (either load or max) */
  95 void CpuCas01::onSpeedChange() {
  96   kernel::lmm::Variable* var = nullptr;
  97   const_lmm_element_t elem = nullptr;
  98
  99   model()->getMaxminSystem()->update_constraint_bound(constraint(), coresAmount_ * speed_.scale * speed_.peak);
 100   while ((var = constraint()->get_variable(&elem))) {
 101     CpuCas01Action* action = static_cast<CpuCas01Action*>(var->get_id());
 102
 103     model()->getMaxminSystem()->update_variable_bound(action->getVariable(),
 104                                                       action->requestedCore() * speed_.scale * speed_.peak);
 105   }
 106
 107   Cpu::onSpeedChange();
 108 }
 109
 110 void CpuCas01::apply_event(tmgr_trace_event_t event, double value)
 111 {
 112   if (event == speed_.event) {
 113     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 114     xbt_assert(coresAmount_ == 1, "FIXME: add speed scaling code also for constraint_core[i]");
 115
 116     speed_.scale = value;
 117     onSpeedChange();
 118
 119     tmgr_trace_event_unref(&speed_.event);
 120   } else if (event == stateEvent_) {
 121     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 122     xbt_assert(coresAmount_ == 1, "FIXME: add state change code also for constraint_core[i]");
 123
 124     if (value > 0) {
 125       if(isOff())
 126         host_that_restart.push_back(getHost());
 127       turnOn();
 128     } else {
 129       kernel::lmm::Constraint* cnst = constraint();
 130       kernel::lmm::Variable* var    = nullptr;
 131       const_lmm_element_t elem = nullptr;
 132       double date              = surf_get_clock();
 133
 134       turnOff();
 135
 136       while ((var = cnst->get_variable(&elem))) {
 137         kernel::resource::Action* action = static_cast<kernel::resource::Action*>(var->get_id());
 138
 139         if (action->get_state() == kernel::resource::Action::State::running ||
 140             action->get_state() == kernel::resource::Action::State::ready ||
 141             action->get_state() == kernel::resource::Action::State::not_in_the_system) {
 142           action->setFinishTime(date);
 143           action->set_state(kernel::resource::Action::State::failed);
 144         }
 145       }
 146     }
 147     tmgr_trace_event_unref(&stateEvent_);
 148
 149   } else {
 150     xbt_die("Unknown event!\n");
 151   }
 152 }
 153
 154 /** @brief Start a new execution on this CPU lasting @param size flops and using one core */
 155 CpuAction* CpuCas01::execution_start(double size)
 156 {
 157   return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint());
 158 }
 159
 160 CpuAction* CpuCas01::execution_start(double size, int requestedCores)
 161 {
 162   return new CpuCas01Action(model(), size, isOff(), speed_.scale * speed_.peak, constraint(), requestedCores);
 163 }
 164
 165 CpuAction *CpuCas01::sleep(double duration)
 166 {
 167   if (duration > 0)
 168     duration = std::max(duration, sg_surf_precision);
 169
 170   XBT_IN("(%s,%g)", getCname(), duration);
 171   CpuCas01Action* action = new CpuCas01Action(model(), 1.0, isOff(), speed_.scale * speed_.peak, constraint());
 172
 173   // FIXME: sleep variables should not consume 1.0 in System::expand()
 174   action->setMaxDuration(duration);
 175   action->suspended_ = kernel::resource::Action::SuspendStates::sleeping;
 176   if (duration < 0) { // NO_MAX_DURATION
 177     /* Move to the *end* of the corresponding action set. This convention is used to speed up update_resource_state */
 178     simgrid::xbt::intrusive_erase(*action->getStateSet(), *action);
 179     action->state_set_ = &static_cast<CpuCas01Model*>(model())->cpuRunningActionSetThatDoesNotNeedBeingChecked_;
 180     action->getStateSet()->push_back(*action);
 181   }
 182
 183   model()->getMaxminSystem()->update_variable_weight(action->getVariable(), 0.0);
 184   if (model()->getUpdateMechanism() == UM_LAZY) { // remove action from the heap
 185     action->heapRemove(model()->getActionHeap());
 186     // this is necessary for a variable with weight 0 since such variables are ignored in lmm and we need to set its
 187     // max_duration correctly at the next call to share_resources
 188     model()->getModifiedSet()->push_front(*action);
 189   }
 190
 191   XBT_OUT();
 192   return action;
 193 }
 194
 195 /**********
 196  * Action *
 197  **********/
 198 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
 199                                kernel::lmm::Constraint* constraint, int requestedCore)
 200     : CpuAction(model, cost, failed,
 201                 model->getMaxminSystem()->variable_new(this, 1.0 / requestedCore, requestedCore * speed, 1))
 202     , requestedCore_(requestedCore)
 203 {
 204   if (model->getUpdateMechanism() == UM_LAZY) {
 205     refreshLastUpdate();
 206     setLastValue(0.0);
 207   }
 208   model->getMaxminSystem()->expand(constraint, getVariable(), 1.0);
 209 }
 210
 211 CpuCas01Action::CpuCas01Action(kernel::resource::Model* model, double cost, bool failed, double speed,
 212                                kernel::lmm::Constraint* constraint)
 213     : CpuCas01Action(model, cost, failed, speed, constraint, 1)
 214 {
 215 }
 216
 217 int CpuCas01Action::requestedCore()
 218 {
 219   return requestedCore_;
 220 }
 221
 222 CpuCas01Action::~CpuCas01Action()=default;
 223
 224 }
 225 }