src/surf/cpu_cas01.cpp

   1 /* Copyright (c) 2009-2011, 2013-2016. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   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. */
   6
   7 #include "cpu_cas01.hpp"
   8 #include "cpu_ti.hpp"
   9 #include "maxmin_private.hpp"
  10 #include "simgrid/sg_config.h"
  11
  12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu,
  13                                 "Logging specific to the SURF CPU IMPROVED module");
  14
  15 /*********
  16  * Model *
  17  *********/
  18 void surf_cpu_model_init_Cas01()
  19 {
  20   xbt_assert(!surf_cpu_model_pm);
  21   xbt_assert(!surf_cpu_model_vm);
  22
  23   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  24   if (!strcmp(optim, "TI")) {
  25     surf_cpu_model_init_ti();
  26     return;
  27   }
  28
  29   surf_cpu_model_pm = new simgrid::surf::CpuCas01Model();
  30   xbt_dynar_push(all_existing_models, &surf_cpu_model_pm);
  31
  32   surf_cpu_model_vm  = new simgrid::surf::CpuCas01Model();
  33   xbt_dynar_push(all_existing_models, &surf_cpu_model_vm);
  34 }
  35
  36 namespace simgrid {
  37 namespace surf {
  38
  39 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
  40 {
  41   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  42   int select = xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
  43
  44   if (!strcmp(optim, "Full")) {
  45     updateMechanism_ = UM_FULL;
  46     selectiveUpdate_ = select;
  47   } else if (!strcmp(optim, "Lazy")) {
  48     updateMechanism_ = UM_LAZY;
  49     selectiveUpdate_ = 1;
  50     xbt_assert((select == 1)
  51                ||
  52                (xbt_cfg_is_default_value
  53                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
  54                "Disabling selective update while using the lazy update mechanism is dumb!");
  55   } else {
  56     xbt_die("Unsupported optimization (%s) for this model", optim);
  57   }
  58
  59   p_cpuRunningActionSetThatDoesNotNeedBeingChecked = new ActionList();
  60
  61   maxminSystem_ = lmm_system_new(selectiveUpdate_);
  62
  63   if (getUpdateMechanism() == UM_LAZY) {
  64     actionHeap_ = xbt_heap_new(8, NULL);
  65     xbt_heap_set_update_callback(actionHeap_,  surf_action_lmm_update_index_heap);
  66     modifiedSet_ = new ActionLmmList();
  67     maxminSystem_->keep_track = modifiedSet_;
  68   }
  69 }
  70
  71 CpuCas01Model::~CpuCas01Model()
  72 {
  73   lmm_system_free(maxminSystem_);
  74   maxminSystem_ = NULL;
  75
  76   if (actionHeap_)
  77     xbt_heap_free(actionHeap_);
  78   delete modifiedSet_;
  79
  80   surf_cpu_model_pm = NULL;
  81
  82   delete p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
  83 }
  84
  85 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, xbt_dynar_t speedPerPstate, int core)
  86 {
  87   return new CpuCas01(this, host, speedPerPstate, core);
  88 }
  89
  90 double CpuCas01Model::next_occuring_event_full(double /*now*/)
  91 {
  92   return Model::shareResourcesMaxMin(getRunningActionSet(), maxminSystem_, lmm_solve);
  93 }
  94
  95 /************
  96  * Resource *
  97  ************/
  98 CpuCas01::CpuCas01(CpuCas01Model *model, simgrid::s4u::Host *host, xbt_dynar_t speedPerPstate, int core)
  99 : Cpu(model, host,
 100     lmm_constraint_new(model->getMaxminSystem(), this, core * xbt_dynar_get_as(speedPerPstate, 0/*pstate*/, double)),
 101     speedPerPstate, core)
 102 {
 103   XBT_DEBUG("CPU create: peak=%f, pstate=%d", speed_.peak, pstate_);
 104
 105   coresAmount_ = core;
 106 }
 107
 108 CpuCas01::~CpuCas01()
 109 {
 110   if (getModel() == surf_cpu_model_pm)
 111     xbt_dynar_free(&speedPerPstate_);
 112 }
 113
 114 xbt_dynar_t CpuCas01::getSpeedPeakList(){
 115   return speedPerPstate_;
 116 }
 117
 118 bool CpuCas01::isUsed()
 119 {
 120   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 121 }
 122
 123 /** @brief take into account changes of speed (either load or max) */
 124 void CpuCas01::onSpeedChange() {
 125   lmm_variable_t var = NULL;
 126   lmm_element_t elem = NULL;
 127
 128     lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(),
 129                                 coresAmount_ * speed_.scale * speed_.peak);
 130     while ((var = lmm_get_var_from_cnst
 131             (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 132       CpuCas01Action *action = static_cast<CpuCas01Action*>(lmm_variable_id(var));
 133
 134       lmm_update_variable_bound(getModel()->getMaxminSystem(),
 135                                 action->getVariable(),
 136                                 speed_.scale * speed_.peak);
 137     }
 138
 139   Cpu::onSpeedChange();
 140 }
 141
 142 void CpuCas01::apply_event(tmgr_trace_iterator_t event, double value)
 143 {
 144   if (event == speed_.event) {
 145     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 146     xbt_assert(coresAmount_ == 1, "FIXME: add speed scaling code also for constraint_core[i]");
 147
 148     speed_.scale = value;
 149     onSpeedChange();
 150
 151     tmgr_trace_event_unref(&speed_.event);
 152   } else if (event == stateEvent_) {
 153     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 154     xbt_assert(coresAmount_ == 1, "FIXME: add state change code also for constraint_core[i]");
 155
 156     if (value > 0) {
 157       if(isOff())
 158         xbt_dynar_push_as(host_that_restart, char*, (char *)getName());
 159       turnOn();
 160     } else {
 161       lmm_constraint_t cnst = getConstraint();
 162       lmm_variable_t var = NULL;
 163       lmm_element_t elem = NULL;
 164       double date = surf_get_clock();
 165
 166       turnOff();
 167
 168       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 169         Action *action = static_cast<Action*>(lmm_variable_id(var));
 170
 171         if (action->getState() == SURF_ACTION_RUNNING ||
 172             action->getState() == SURF_ACTION_READY ||
 173             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 174           action->setFinishTime(date);
 175           action->setState(SURF_ACTION_FAILED);
 176         }
 177       }
 178     }
 179     tmgr_trace_event_unref(&stateEvent_);
 180
 181   } else {
 182     xbt_die("Unknown event!\n");
 183   }
 184 }
 185
 186 CpuAction *CpuCas01::execution_start(double size)
 187 {
 188
 189   XBT_IN("(%s,%g)", getName(), size);
 190   CpuCas01Action *action = new CpuCas01Action(getModel(), size, isOff(),
 191       speed_.scale * speed_.peak, getConstraint());
 192
 193   XBT_OUT();
 194   return action;
 195 }
 196
 197 CpuAction *CpuCas01::sleep(double duration)
 198 {
 199   if (duration > 0)
 200     duration = MAX(duration, sg_surf_precision);
 201
 202   XBT_IN("(%s,%g)", getName(), duration);
 203   CpuCas01Action *action = new CpuCas01Action(getModel(), 1.0, isOff(),
 204       speed_.scale * speed_.peak, getConstraint());
 205
 206
 207   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 208   action->m_maxDuration = duration;
 209   action->m_suspended = 2;
 210   if (duration == NO_MAX_DURATION) {
 211     /* Move to the *end* of the corresponding action set. This convention
 212        is used to speed up update_resource_state  */
 213     action->getStateSet()->erase(action->getStateSet()->iterator_to(*action));
 214     action->p_stateSet = static_cast<CpuCas01Model*>(getModel())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 215     action->getStateSet()->push_back(*action);
 216   }
 217
 218   lmm_update_variable_weight(getModel()->getMaxminSystem(),
 219       action->getVariable(), 0.0);
 220   if (getModel()->getUpdateMechanism() == UM_LAZY) {     // remove action from the heap
 221     action->heapRemove(getModel()->getActionHeap());
 222     // this is necessary for a variable with weight 0 since such
 223     // variables are ignored in lmm and we need to set its max_duration
 224     // correctly at the next call to share_resources
 225     getModel()->getModifiedSet()->push_front(*action);
 226   }
 227
 228   XBT_OUT();
 229   return action;
 230 }
 231
 232 /**********
 233  * Action *
 234  **********/
 235
 236 CpuCas01Action::CpuCas01Action(Model *model, double cost, bool failed, double speed, lmm_constraint_t constraint)
 237  : CpuAction(model, cost, failed,
 238          lmm_variable_new(model->getMaxminSystem(), this,
 239          1.0, speed, 1))
 240 {
 241   if (model->getUpdateMechanism() == UM_LAZY) {
 242     m_indexHeap = -1;
 243     m_lastUpdate = surf_get_clock();
 244     m_lastValue = 0.0;
 245   }
 246   lmm_expand(model->getMaxminSystem(), constraint, getVariable(), 1.0);
 247 }
 248
 249 }
 250 }