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   simgrid::surf::on_postparse.connect([]() {
  37     surf_cpu_model_pm->addTraces();
  38   });
  39 }
  40
  41 namespace simgrid {
  42 namespace surf {
  43
  44 CpuCas01Model::CpuCas01Model() : simgrid::surf::CpuModel()
  45 {
  46   char *optim = xbt_cfg_get_string(_sg_cfg_set, "cpu/optim");
  47   int select = xbt_cfg_get_boolean(_sg_cfg_set, "cpu/maxmin_selective_update");
  48
  49   if (!strcmp(optim, "Full")) {
  50     p_updateMechanism = UM_FULL;
  51     m_selectiveUpdate = select;
  52   } else if (!strcmp(optim, "Lazy")) {
  53     p_updateMechanism = UM_LAZY;
  54     m_selectiveUpdate = 1;
  55     xbt_assert((select == 1)
  56                ||
  57                (xbt_cfg_is_default_value
  58                 (_sg_cfg_set, "cpu/maxmin_selective_update")),
  59                "Disabling selective update while using the lazy update mechanism is dumb!");
  60   } else {
  61     xbt_die("Unsupported optimization (%s) for this model", optim);
  62   }
  63
  64   p_cpuRunningActionSetThatDoesNotNeedBeingChecked = new ActionList();
  65
  66   p_maxminSystem = lmm_system_new(m_selectiveUpdate);
  67
  68   if (getUpdateMechanism() == UM_LAZY) {
  69     p_actionHeap = xbt_heap_new(8, NULL);
  70     xbt_heap_set_update_callback(p_actionHeap,  surf_action_lmm_update_index_heap);
  71     p_modifiedSet = new ActionLmmList();
  72     p_maxminSystem->keep_track = p_modifiedSet;
  73   }
  74 }
  75
  76 CpuCas01Model::~CpuCas01Model()
  77 {
  78   lmm_system_free(p_maxminSystem);
  79   p_maxminSystem = NULL;
  80
  81   if (p_actionHeap)
  82     xbt_heap_free(p_actionHeap);
  83   delete p_modifiedSet;
  84
  85   surf_cpu_model_pm = NULL;
  86
  87   delete p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
  88 }
  89
  90 Cpu *CpuCas01Model::createCpu(simgrid::s4u::Host *host, xbt_dynar_t speedPeak,
  91                                   int pstate, double speedScale,
  92                           tmgr_trace_t speedTrace, int core,
  93                           int initiallyOn,
  94                           tmgr_trace_t state_trace)
  95 {
  96   xbt_assert(xbt_dynar_getfirst_as(speedPeak, double) > 0.0,
  97       "Speed has to be >0.0. Did you forget to specify the mandatory power attribute?");
  98   xbt_assert(core > 0, "Invalid number of cores %d. Must be larger than 0", core);
  99   Cpu *cpu = new CpuCas01(this, host, speedPeak, pstate, speedScale, speedTrace, core, initiallyOn, state_trace);
 100   return cpu;
 101 }
 102
 103 double CpuCas01Model::shareResourcesFull(double /*now*/)
 104 {
 105   return Model::shareResourcesMaxMin(getRunningActionSet(),
 106                              p_maxminSystem, lmm_solve);
 107 }
 108
 109 void CpuCas01Model::addTraces()
 110 {
 111   xbt_dict_cursor_t cursor = NULL;
 112   char *trace_name, *elm;
 113   static int called = 0;
 114   if (called)
 115     return;
 116   called = 1;
 117
 118   /* connect all traces relative to hosts */
 119   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 120     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 121     CpuCas01 *host = static_cast<CpuCas01*>(sg_host_by_name(elm)->pimpl_cpu);
 122
 123     xbt_assert(host, "Host %s undefined", elm);
 124     xbt_assert(trace, "Trace %s undefined", trace_name);
 125
 126     host->p_stateEvent = future_evt_set->add_trace(trace, 0.0, host);
 127   }
 128
 129   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 130     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 131     CpuCas01 *host = static_cast<CpuCas01*>(sg_host_by_name(elm)->pimpl_cpu);
 132
 133     xbt_assert(host, "Host %s undefined", elm);
 134     xbt_assert(trace, "Trace %s undefined", trace_name);
 135
 136     host->p_speedEvent = future_evt_set->add_trace(trace, 0.0, host);
 137   }
 138 }
 139
 140 /************
 141  * Resource *
 142  ************/
 143 CpuCas01::CpuCas01(CpuCas01Model *model, simgrid::s4u::Host *host, xbt_dynar_t speedPeak,
 144                          int pstate, double speedScale, tmgr_trace_t speedTrace, int core,
 145                          int initiallyOn, tmgr_trace_t stateTrace)
 146 : Cpu(model, host,
 147         lmm_constraint_new(model->getMaxminSystem(), this, core * speedScale * xbt_dynar_get_as(speedPeak, pstate, double)),
 148         speedPeak, pstate,
 149         core, xbt_dynar_get_as(speedPeak, pstate, double), speedScale,
 150     initiallyOn) {
 151
 152   XBT_DEBUG("CPU create: peak=%f, pstate=%d", m_speedPeak, m_pstate);
 153
 154   m_core = core;
 155   if (speedTrace)
 156     p_speedEvent = future_evt_set->add_trace(speedTrace, 0.0, this);
 157
 158   if (stateTrace)
 159     p_stateEvent = future_evt_set->add_trace(stateTrace, 0.0, this);
 160 }
 161
 162 CpuCas01::~CpuCas01()
 163 {
 164   if (getModel() == surf_cpu_model_pm)
 165     xbt_dynar_free(&p_speedPeakList);
 166 }
 167
 168 xbt_dynar_t CpuCas01::getSpeedPeakList(){
 169   return p_speedPeakList;
 170 }
 171
 172 bool CpuCas01::isUsed()
 173 {
 174   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 175 }
 176
 177 /** @brief take into account changes of speed (either load or max) */
 178 void CpuCas01::onSpeedChange() {
 179         lmm_variable_t var = NULL;
 180         lmm_element_t elem = NULL;
 181
 182     lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(),
 183                                 m_core * m_speedScale * m_speedPeak);
 184     while ((var = lmm_get_var_from_cnst
 185             (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 186       CpuCas01Action *action = static_cast<CpuCas01Action*>(lmm_variable_id(var));
 187
 188       lmm_update_variable_bound(getModel()->getMaxminSystem(),
 189                                 action->getVariable(),
 190                                 m_speedScale * m_speedPeak);
 191     }
 192
 193         Cpu::onSpeedChange();
 194 }
 195
 196 void CpuCas01::updateState(tmgr_trace_iterator_t event_type, double value, double date)
 197 {
 198   lmm_variable_t var = NULL;
 199   lmm_element_t elem = NULL;
 200
 201   if (event_type == p_speedEvent) {
 202     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 203     xbt_assert(m_core == 1, "FIXME: add speed scaling code also for constraint_core[i]");
 204
 205     m_speedScale = value;
 206     onSpeedChange();
 207
 208     if (tmgr_trace_event_free(event_type))
 209       p_speedEvent = nullptr;
 210   } else if (event_type == p_stateEvent) {
 211     /* TODO (Hypervisor): do the same thing for constraint_core[i] */
 212     xbt_assert(m_core == 1, "FIXME: add state change code also for constraint_core[i]");
 213
 214     if (value > 0) {
 215       if(isOff())
 216         xbt_dynar_push_as(host_that_restart, char*, (char *)getName());
 217       turnOn();
 218     } else {
 219       lmm_constraint_t cnst = getConstraint();
 220
 221       turnOff();
 222
 223       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 224         Action *action = static_cast<Action*>(lmm_variable_id(var));
 225
 226         if (action->getState() == SURF_ACTION_RUNNING ||
 227             action->getState() == SURF_ACTION_READY ||
 228             action->getState() == SURF_ACTION_NOT_IN_THE_SYSTEM) {
 229           action->setFinishTime(date);
 230           action->setState(SURF_ACTION_FAILED);
 231         }
 232       }
 233     }
 234     if (tmgr_trace_event_free(event_type))
 235       p_stateEvent = nullptr;
 236   } else {
 237     xbt_die("Unknown event!\n");
 238   }
 239
 240   return;
 241 }
 242
 243 CpuAction *CpuCas01::execute(double size)
 244 {
 245
 246   XBT_IN("(%s,%g)", getName(), size);
 247   CpuCas01Action *action = new CpuCas01Action(getModel(), size, isOff(),
 248       m_speedScale * m_speedPeak, getConstraint());
 249
 250   XBT_OUT();
 251   return action;
 252 }
 253
 254 CpuAction *CpuCas01::sleep(double duration)
 255 {
 256   if (duration > 0)
 257     duration = MAX(duration, sg_surf_precision);
 258
 259   XBT_IN("(%s,%g)", getName(), duration);
 260   CpuCas01Action *action = new CpuCas01Action(getModel(), 1.0, isOff(),
 261       m_speedScale * m_speedPeak, getConstraint());
 262
 263
 264   // FIXME: sleep variables should not consume 1.0 in lmm_expand
 265   action->m_maxDuration = duration;
 266   action->m_suspended = 2;
 267   if (duration == NO_MAX_DURATION) {
 268     /* Move to the *end* of the corresponding action set. This convention
 269        is used to speed up update_resource_state  */
 270     action->getStateSet()->erase(action->getStateSet()->iterator_to(*action));
 271     action->p_stateSet = static_cast<CpuCas01Model*>(getModel())->p_cpuRunningActionSetThatDoesNotNeedBeingChecked;
 272     action->getStateSet()->push_back(*action);
 273   }
 274
 275   lmm_update_variable_weight(getModel()->getMaxminSystem(),
 276       action->getVariable(), 0.0);
 277   if (getModel()->getUpdateMechanism() == UM_LAZY) {     // remove action from the heap
 278     action->heapRemove(getModel()->getActionHeap());
 279     // this is necessary for a variable with weight 0 since such
 280     // variables are ignored in lmm and we need to set its max_duration
 281     // correctly at the next call to share_resources
 282     getModel()->getModifiedSet()->push_front(*action);
 283   }
 284
 285   XBT_OUT();
 286   return action;
 287 }
 288
 289 /**********
 290  * Action *
 291  **********/
 292
 293 CpuCas01Action::CpuCas01Action(Model *model, double cost, bool failed, double speed, lmm_constraint_t constraint)
 294  : CpuAction(model, cost, failed,
 295                      lmm_variable_new(model->getMaxminSystem(), this,
 296                      1.0, speed, 1))
 297 {
 298   if (model->getUpdateMechanism() == UM_LAZY) {
 299     m_indexHeap = -1;
 300     m_lastUpdate = surf_get_clock();
 301     m_lastValue = 0.0;
 302   }
 303   lmm_expand(model->getMaxminSystem(), constraint, getVariable(), 1.0);
 304 }
 305
 306 }
 307 }