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 #include "src/surf/platform.hpp"
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_cas, surf_cpu,
  14                                 "Logging specific to the SURF CPU IMPROVED module");
  15
  16 /*********
  17  * Model *
  18  *********/
  19 void surf_cpu_model_init_Cas01()
  20 {
  21   xbt_assert(!surf_cpu_model_pm);
  22   xbt_assert(!surf_cpu_model_vm);
  23
  24   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  25   if (!strcmp(optim, "TI")) {
  26     surf_cpu_model_init_ti();
  27     return;
  28   }
  29
  30   surf_cpu_model_pm = new simgrid::surf::CpuCas01Model();
  31   xbt_dynar_push(all_existing_models, &surf_cpu_model_pm);
  32
  33   surf_cpu_model_vm  = new simgrid::surf::CpuCas01Model();
  34   xbt_dynar_push(all_existing_models, &surf_cpu_model_vm);
  35 }
  36
  37 namespace simgrid {
  38 namespace surf {
  39
  40 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
  41 {
  42   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  43   int select = xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
  44
  45   if (!strcmp(optim, "Full")) {
  46     p_updateMechanism = UM_FULL;
  47     m_selectiveUpdate = select;
  48   } else if (!strcmp(optim, "Lazy")) {
  49     p_updateMechanism = UM_LAZY;
  50     m_selectiveUpdate = 1;
  51     xbt_assert((select == 1)
  52                ||
  53                (xbt_cfg_is_default_value
  54                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
  55                "Disabling selective update while using the lazy update mechanism is dumb!");
  56   } else {
  57     xbt_die("Unsupported optimization (%s) for this model", optim);
  58   }
  59
  60   p_cpuRunningActionSetThatDoesNotNeedBeingChecked = new ActionList();
  61
  62   p_maxminSystem = lmm_system_new(m_selectiveUpdate);
  63
  64   if (getUpdateMechanism() == UM_LAZY) {
  65     p_actionHeap = xbt_heap_new(8, NULL);
  66     xbt_heap_set_update_callback(p_actionHeap,  surf_action_lmm_update_index_heap);
  67     p_modifiedSet = new ActionLmmList();
  68     p_maxminSystem->keep_track = p_modifiedSet;
  69   }
  70 }
  71
  72 CpuCas01Model::~CpuCas01Model()
  73 {
  74   lmm_system_free(p_maxminSystem);
  75   p_maxminSystem = NULL;
  76
  77   if (p_actionHeap)
  78     xbt_heap_free(p_actionHeap);
  79   delete p_modifiedSet;
  80
  81   surf_cpu_model_pm = NULL;
  82
  83   delete p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
  84 }
  85
  86 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, xbt_dynar_t speedPeak,
  87                       int pstate, double speedScale,
  88                           tmgr_trace_t speedTrace, int core,
  89                           int initiallyOn,
  90                           tmgr_trace_t state_trace)
  91 {
  92   xbt_assert(xbt_dynar_getfirst_as(speedPeak, double) > 0.0,
  93       "Speed has to be >0.0. Did you forget to specify the mandatory power attribute?");
  94   xbt_assert(core > 0, "Invalid number of cores %d. Must be larger than 0", core);
  95   Cpu *cpu = new CpuCas01(this, host, speedPeak, pstate, speedScale, speedTrace, core, initiallyOn, state_trace);
  96   return cpu;
  97 }
  98
  99 double CpuCas01Model::next_occuring_event_full(double /*now*/)
 100 {
 101   return Model::shareResourcesMaxMin(getRunningActionSet(), p_maxminSystem, lmm_solve);
 102 }
 103
 104 /************
 105  * Resource *
 106  ************/
 107 CpuCas01::CpuCas01(CpuCas01Model *model, simgrid::s4u::Host *host, xbt_dynar_t speedPeak,
 108                          int pstate, double speedScale, tmgr_trace_t speedTrace, int core,
 109                          int initiallyOn, tmgr_trace_t stateTrace)
 110 : Cpu(model, host,
 111   lmm_constraint_new(model->getMaxminSystem(), this, core * speedScale * xbt_dynar_get_as(speedPeak, pstate, double)),
 112   speedPeak, pstate,
 113   core, xbt_dynar_get_as(speedPeak, pstate, double), speedScale,
 114     initiallyOn) {
 115
 116   XBT_DEBUG("CPU create: peak=%f, pstate=%d", p_speed.peak, m_pstate);
 117
 118   m_core = core;
 119   if (speedTrace)
 120     p_speed.event = future_evt_set->add_trace(speedTrace, 0.0, this);
 121
 122   if (stateTrace)
 123     p_stateEvent = future_evt_set->add_trace(stateTrace, 0.0, this);
 124 }
 125
 126 CpuCas01::~CpuCas01()
 127 {
 128   if (getModel() == surf_cpu_model_pm)
 129     xbt_dynar_free(&p_speedPeakList);
 130 }
 131
 132 xbt_dynar_t CpuCas01::getSpeedPeakList(){
 133   return p_speedPeakList;
 134 }
 135
 136 bool CpuCas01::isUsed()
 137 {
 138   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 139 }
 140
 141 /** @brief take into account changes of speed (either load or max) */
 142 void CpuCas01::onSpeedChange() {
 143   lmm_variable_t var = NULL;
 144   lmm_element_t elem = NULL;
 145
 146     lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(),
 147                                 m_core * p_speed.scale * p_speed.peak);
 148     while ((var = lmm_get_var_from_cnst
 149             (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 150       CpuCas01Action *action = static_cast<CpuCas01Action*>(lmm_variable_id(var));
 151
 152       lmm_update_variable_bound(getModel()->getMaxminSystem(),
 153                                 action->getVariable(),
 154                                 p_speed.scale * p_speed.peak);
 155     }
 156
 157   Cpu::onSpeedChange();
 158 }
 159
 160 void CpuCas01::apply_event(tmgr_trace_iterator_t event, double value)
 161 {
 162   if (event == p_speed.event) {
 163     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 164     xbt_assert(m_core == 1, "FIXME: add speed scaling code also for constraint_core[i]");
 165
 166     p_speed.scale = value;
 167     onSpeedChange();
 168
 169     tmgr_trace_event_unref(&p_speed.event);
 170   } else if (event == p_stateEvent) {
 171     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 172     xbt_assert(m_core == 1, "FIXME: add state change code also for constraint_core[i]");
 173
 174     if (value > 0) {
 175       if(isOff())
 176         xbt_dynar_push_as(host_that_restart, char*, (char *)getName());
 177       turnOn();
 178     } else {
 179       lmm_constraint_t cnst = getConstraint();
 180       lmm_variable_t var = NULL;
 181       lmm_element_t elem = NULL;
 182       double date = surf_get_clock();
 183
 184       turnOff();
 185
 186       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 187         Action *action = static_cast<Action*>(lmm_variable_id(var));
 188
 189         if (action->getState() == SURF_ACTION_RUNNING ||
 190             action->getState() == SURF_ACTION_READY ||
 191             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 192           action->setFinishTime(date);
 193           action->setState(SURF_ACTION_FAILED);
 194         }
 195       }
 196     }
 197     tmgr_trace_event_unref(&p_stateEvent);
 198
 199   } else {
 200     xbt_die("Unknown event!\n");
 201   }
 202 }
 203
 204 CpuAction *CpuCas01::execution_start(double size)
 205 {
 206
 207   XBT_IN("(%s,%g)", getName(), size);
 208   CpuCas01Action *action = new CpuCas01Action(getModel(), size, isOff(),
 209       p_speed.scale * p_speed.peak, getConstraint());
 210
 211   XBT_OUT();
 212   return action;
 213 }
 214
 215 CpuAction *CpuCas01::sleep(double duration)
 216 {
 217   if (duration > 0)
 218     duration = MAX(duration, sg_surf_precision);
 219
 220   XBT_IN("(%s,%g)", getName(), duration);
 221   CpuCas01Action *action = new CpuCas01Action(getModel(), 1.0, isOff(),
 222       p_speed.scale * p_speed.peak, getConstraint());
 223
 224
 225   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 226   action->m_maxDuration = duration;
 227   action->m_suspended = 2;
 228   if (duration == NO_MAX_DURATION) {
 229     /* Move to the *end* of the corresponding action set. This convention
 230        is used to speed up update_resource_state  */
 231     action->getStateSet()->erase(action->getStateSet()->iterator_to(*action));
 232     action->p_stateSet = static_cast<CpuCas01Model*>(getModel())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 233     action->getStateSet()->push_back(*action);
 234   }
 235
 236   lmm_update_variable_weight(getModel()->getMaxminSystem(),
 237       action->getVariable(), 0.0);
 238   if (getModel()->getUpdateMechanism() == UM_LAZY) {     // remove action from the heap
 239     action->heapRemove(getModel()->getActionHeap());
 240     // this is necessary for a variable with weight 0 since such
 241     // variables are ignored in lmm and we need to set its max_duration
 242     // correctly at the next call to share_resources
 243     getModel()->getModifiedSet()->push_front(*action);
 244   }
 245
 246   XBT_OUT();
 247   return action;
 248 }
 249
 250 /**********
 251  * Action *
 252  **********/
 253
 254 CpuCas01Action::CpuCas01Action(Model *model, double cost, bool failed, double speed, lmm_constraint_t constraint)
 255  : CpuAction(model, cost, failed,
 256          lmm_variable_new(model->getMaxminSystem(), this,
 257          1.0, speed, 1))
 258 {
 259   if (model->getUpdateMechanism() == UM_LAZY) {
 260     m_indexHeap = -1;
 261     m_lastUpdate = surf_get_clock();
 262     m_lastValue = 0.0;
 263   }
 264   lmm_expand(model->getMaxminSystem(), constraint, getVariable(), 1.0);
 265 }
 266
 267 }
 268 }