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